专利摘要:
Inflatable protective device (14) inflatable between a vehicle surface (36) and an occupant. A vent (110) has an opening (114) for releasing fluid from the device (14). A guide clip (113) is connected to the vent door (120). A vent clip (112) is connected to the clip device (14) and includes a guide (123) connected to the guide clip (113) for the guide (123) and the guide clip ( 113) can slide relative to each other. A voltage on the vent clip (112) applies tension to the guide clip (113) to actuate the vent (110). The vent (110) is configured to be initially in a non-actuated state upon initial deployment of the device (14), a subsequent deployment (14) to a predefined degree causing the vent clip (112) to act on the guide clip (113) to turn the vent (110) into an activated state.
公开号:FR3019510A1
申请号:FR1552772
申请日:2015-03-31
公开日:2015-10-09
发明作者:Kurt F Fischer；Norcy Yohann Le；Oscar Ugarte
申请人:TRW Vehicle Safety Systems Inc；
IPC主号:

专利说明:

[0001] Field of the Invention The present invention relates to apparatus for helping to protect an occupant of a vehicle and, in particular, relates to an inflatable airbag inflatable between a dashboard and an airbag. a front seat occupant of a vehicle. BACKGROUND OF THE INVENTION It is known to provide an inflatable vehicle occupant protection device, such as an airbag, to help protect an occupant of a vehicle. A specific type of airbag is a front airbag between an occupant of a front seat of the vehicle and a dashboard of the vehicle. Such airbags may be driver airbags or passenger airbags. When inflated, the driver and passenger airbags help protect the occupant from shocks with vehicle parts, such as the dashboard and / or a steering wheel of the vehicle. Passenger airbags are usually stored in a deflated condition in a case that is mounted on the dashboard of the vehicle. An airbag door can be connected to the housing and / or dashboard to help lock and conceal the airbag in a stored state. When deploying the passenger airbag, the airbag door opens to allow the airbag to move to an inflated position. The airbag door opens as a result of forces exerted on the door by the inflating airbag. Driver airbags are usually stored in a deflated condition in a case that is mounted on the vehicle steering wheel. An airbag cover may be connected to the housing and / or the steering wheel to assist in locking and concealing the airbag in a stored condition. When deploying the driver airbag, the airbag cover opens to allow the airbag to move to an inflated position. The airbag cover opens as a result of forces exerted on the lid by the inflating driver airbag. Another type of airbag is an airbag for side impacts that can be inflated between a side structure of a vehicle and a vehicle occupant. Side impact airbags may, for example, be mounted on the seat, mounted on the side structure or mounted on the door. Another type of airbag is an inflatable bolster for the knees that can be inflated between a dashboard and / or a steering column of a vehicle and a vehicle occupant. The inflatable bolsters for the knees can, for example, be mounted in the dashboard or on the steering column. SUMMARY OF THE INVENTION The present invention relates to an apparatus for helping to protect an occupant of a vehicle. The apparatus includes an inflatable vehicle occupant protection device that can be inflated between a vehicle surface and the occupant of the vehicle. The protection device comprises a panel having a portion presented towards the occupant when the protective device is in an inflated state. A vent has at least one opening for releasing the inflation fluid from the protection device and has an actuated state and a non-actuated state. A guide clip is connected to the vent door and a vent clip is connected to the guard. The vent clip includes a guide which is connected to the guide clip so that the guide and the guide clip can slide relative to each other. A voltage on the vent clip applies tension to the guide clip to actuate the vent. The vent is configured to be initially in the non-actuated state upon initial deployment of the protection device, subsequent deployment of the protection device to a predefined degree causing the vent clip to act on the airbag attachment. guiding to put the vent in the activated state. The present invention also relates to an apparatus for helping to protect an occupant of a vehicle. The apparatus includes an inflatable vehicle occupant protection device that can be inflated between a vehicle surface and the occupant of the vehicle. The protection device comprises a panel having a portion presented towards the occupant when the protective device is in an inflated state. A vent has at least one opening for releasing the inflation fluid from the protection device and has an actuated state and a non-actuated state. A guide is located on the vent door. A vent is connected to the guard and extends through the guide so that the vent clip and the guide can slide relative to each other. A voltage on the vent clip applies tension on the guide to actuate the vent. The vent is configured to be initially in the non-actuated state upon initial deployment of the guard, subsequent deployment of the guard to a predefined degree causing the vent clamp to act on the guide to engage the vent in the activated state.
[0002] BRIEF DESCRIPTION OF THE DRAWINGS The above and other features of the present invention will be apparent to those skilled in the art to which the present invention is directed in light of the following description of the invention when read with reference to the accompanying drawings, in which: Figures 1 and 2 are schematic side views illustrating different states of an apparatus, to help protect an occupant of a vehicle, according to one aspect of the invention.
[0003] Fig. 3 is a graph illustrating certain occupant characteristics under different vehicle operating conditions. Figure 4 is a schematic illustration of an adaptive fastener of the apparatus of Figure 1.
[0004] Figs. 5A to 5C are enlarged rear views of a portion of the apparatus of Figs. 1 and 2, respectively. Figures 6 and 7 are schematic side views illustrating an apparatus for assisting in protecting an occupant of a vehicle, according to another aspect of the invention. Figs. 8A to 8C are schematic views illustrating different states of the apparatus of Figs. 6 and 7 having a different configuration. Fig. 9 is a graph illustrating certain occupant characteristics under different vehicle operating conditions and corresponding vent states associated with the vent configuration of Figs. 8A-8C. Figs. 10A to 10C are enlarged views of a portion of the apparatus of Figs. 6 and 7 in different states, according to one aspect of the invention. Figs. 11A to 11C are enlarged views of a portion of the apparatus of Figs. 6 and 7 in different states, according to another aspect of the invention. Fig. 12 is a schematic side view illustrating an apparatus for helping to protect an occupant of a vehicle, according to another aspect of the invention. Figs. 13A-13C are schematic views illustrating different states of the apparatus of Fig. 12 having a different configuration.
[0005] Figs. 14A-14C are enlarged views of a portion of the apparatus of Fig. 12 in different states, according to one aspect of the invention. Figs. 15A to 15C are enlarged views of a portion of the apparatus of Fig. 12 in different states according to another aspect of the invention. DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for helping to protect an occupant of a vehicle and, in particular, relates to an inflatable airbag inflatable between a dashboard and a front seat occupant. of a vehicle. Figures 1 and 2 illustrate an example of an apparatus 10 for helping to protect an occupant 20 of a vehicle 12 which includes an inflatable vehicle occupant protection device 14 in the form of an airbag. In the embodiment illustrated in FIGS. 1 and 2, the airbag 14 is a front passenger airbag to help protect an occupant 20 of a seat 22 on a passenger side 24 of the vehicle 12. As shown in FIGS. Figures 1 and 2, the vehicle 12 also includes a seat belt 18 to help protect the occupant 20 of the vehicle. The airbag 14 may be part of an airbag module 30 which includes an inflator 32 and a housing 34. The airbag 14 has a stored state, shown in dashed lines in Figure 1, in which the airbag is folded and placed in the housing 34. The module 30 is mounted on a dashboard or dashboard 36 of the vehicle 12. The housing 34 helps to contain and support the airbag 14 and the inflator 32 in the dashboard 36. An airbag door 40 is removably connected to the dashboard 36 and / or the housing 34. In a closed state (not shown), the inflatable cushion door 40 forms a cover for the module 30. and helps to enclose the airbag 14 in the state stored in the housing 34. The door 40 is able to move to an open state, shown in Figure 1, to discover an opening 44 through which the airbag 14 can be deployed since state stored in the housing 34. The door 40 may be connected to the vehicle 12, for example to the dashboard 36, either directly or through the housing 34, by means (not shown), such as a part plastic hinge, band or tie. The inflator 32 is operable to bring the inflation fluid to an inflatable volume 54 of the airbag 14 to deploy the airbag to the inflated state. The inflator 32 can be of any known type, such as a stored gas, a solid propellant, increased or hybrid. The apparatus 10 includes a sensor, schematically shown at 50, for detecting an event for which inflation of the airbag 14 is desired, such as a collision. The inflator 32 is operatively connected to the sensor 50 through conductive wires 52. The airbag 14 may be made of any suitable material, such as nylon (eg 6-6 woven nylon), and may to be constructed in any appropriate manner. For example, the airbag 14 may comprise one or more pieces or panels of material. If more than one piece or panel is used, the pieces or panels may be connected to each other by known means, such as sewing, ultrasonic welding, heat sealing or adhesives, to form the airbag. The airbag 14 may be uncoated, coated with a material, such as a gas impermeable urethane, or laminated with a material, such as a gas impermeable film. The airbag 14 may therefore have a gas-tight or substantially gas-tight construction. It will be apparent to those skilled in the art that other materials, such as polyester yarn, and other coatings, such as silicone, may also be employed for the construction of the airbag 14. Upon occurrence of an event for which inflation of the airbag 14 is desired, such as a collision of the vehicle, the sensor 50 provides a signal to the inflator 32 via the leads 52. Upon receipt of the signal from the sensor 50 the inflator 32 is actuated and supplies the inflating fluid to the inflatable volume 54 of the airbag 14 in a known manner. The inflating airbag 14 exerts a force on the door 40, which moves the door to the open state. The airbag 14 inflates, from the stored state to an expanded state, such as the fully inflated, expanded, and pressurized state, shown in solid lines in FIG. 1. The airbag 14, when inflated, helps to protecting the occupant 20 of the vehicle from shocks with portions of the vehicle 12, such as the dashboard 36. The airbag 14, when deployed in response to an event for which occupant protection is desired, helps protecting the occupant 20 by helping to absorb the impact force placed on the airbag by the occupant. When occupant strikes airbag 14, the occupant enters the airbag, which absorbs and distributes impact forces throughout the entire high area and volume of the airbag. By "penetrates" into the airbag 14, reference is made to the case where, in the case of a frontal impact on the vehicle 12, the occupant 20 is moved forward, as indicated by the arrow marked 42 on FIGS. 1 and 2 until contacting the airbag 14. The "penetration" of the occupant into the airbag 14 is the distance or degree on which the occupant 20 moves in the inflation depth. of the airbag. In other words, the degree of penetration could be measured as the distance over which a given point on the front panel 74 is moved to the dashboard 36 by the occupant 20 penetrating the cushion. For example, the degree of penetration in Fig. 2 can be calculated as the difference between the marked inflation depth D1 in Fig. 1 and the marked inflation depth D2 in Fig. 2. Alternatively, the penetration could be measured as the distance between a point on the front panel 74 and a fixed point on the dashboard 36 or between a point on the occupant 20 (for example the occupant's bust) and a fixed point on the dashboard . Several factors determine the degree to which an occupant 14 enters the airbag 14. For example, the size or weight of the occupant 20, the speed at which the occupant strikes the airbag 14, the pressurization of the airbag and whether or not the occupant is restrained by the seat belt 18, all of these factors help to determine the degree to which the occupant enters the airbag in a given deployment scenario. Some of these determining factors are illustrated in Figure 3, which illustrates the inflow of the chest from the chest to the dashboard for occupants who have different sizes, who have attached their belts or not, and who hit the cushion inflatable 14 at different speeds. Figure 3 illustrates penetration values for two occupants of different sizes - a male occupant at the 50th percentile (50% value) and a female occupant at the 5th percentile (5% value). The value of 50% for men is derived from statistical values for the American male population. The 50% value for men represents the average size and weight of the American male population, which means that about half of the American male population is larger / more cumbersome and about half of the US population. American male population is smaller / lighter. The value of 50% for men therefore represents a male occupant of average or median size. The value of 5% for women is derived from statistical values for the US female population. The value of 5% 5 for women represents an average height and average weight that is only about 5% of that of the US female population. Conversely, this means that about 95% of the US female population is larger / heavier. The value of 5% for 10 women therefore represents a small female occupant. Figure 3 illustrates that whether or not the occupant wears his seat belt affects the occupant's penetration into the airbag. As shown in Fig. 3, a sex occupant with a value of 5%, not attached, moving (40.23 km / h) enters the airbag 200 mm more than a female occupant at 5. %, tied up, moving at 35 mph (56.32 20 similarly, a male to female occupant at around 25 mph from the km / h value). A value of 50%, unattached, traveling at 25 mph (40.23 km / h) penetrates the airbag much more than 200 mm (about 225 mm) more than a male occupant at the 50% value, attached, moving at 35 mph (56.32 km / h). In fact, the female occupant at the 50% unattached value, traveling at 25 mph (40.23 km / h) enters the airbag approximately 150 mm more than the male occupant at the value of 50%, attached, moving at 35 mph (56.32 km / h). It will be apparent to those skilled in the art that many lessons can be drawn from the data concerning the wearing or non-wearing of seatbelts, illustrated in FIG. 3. For example, a male occupant at the 50% value, unattached, at 25 mph (40.23 km / h), 35 hits and passes through the airbag and hits the dashboard. A female occupant at the value of 5%, unattached, traveling at 25 mph (40.23 km / h) is 50 mm to cross the airbag and hit the dashboard. Due to different seating positions for occupants, male occupants at the value of 50%, tied, and female occupants, at the value of 5%, tied, moving at 35 mph (56, 32 km / h) are about 200 mm to cross the airbag and hit the dashboard. It will be noted that the difference between crossing and damping can be a question of relatively short distances / positions. For example, if the seating position of the male occupant, at the value of 50%, is close to 100 mm, the difference between the crossing and the absence of airbag crossing is 100 mm, and can be easily canceled depending on whether the occupant is a little bigger or heavier, the belt is a bit loose, or the vehicle is moving at a slightly higher speed. It then becomes very difficult to respond actively to the large number of size / weight combinations of the occupant, sitting position, vehicle speed, and seat belt, which may exist at the time of deployment of the airbag. To take this into account, the airbag 14 may include one or more actuatable elements to help control or customize the inflation, deployment, and pressurization of the airbag in response to vehicle conditions, occupant conditions, or conditions of both vehicle and occupant. These elements are passively operable in response to vehicle and occupant conditions at the time of inflation. Therefore, in the illustrated embodiments, these elements are operable without the use of active sensors and / or actuators, such as electric or pyrotechnic actuators. According to the present invention, these elements are passively operable in response to vehicle and occupant conditions at the time of inflation. Thus, in the illustrated embodiment, these elements can be actuated without using active sensors and / or actuators, such as electric or pyrotechnic actuators. It will be apparent to those skilled in the art that some of these elements could be actively operated, for example in response to conditions determined by active sensors. With reference to Figures 1 and 2, the airbag 14 includes an adaptive clip 60 to adapt the configuration of the airbag 14 according to one or more vehicle or occupant conditions in the vehicle 12. In the embodiment 1 and 2, the adaptive fastener 60 is a three-legged fastener having a first segment which serves as a release fastener 62, a second segment which serves as a forming fastener 64, and a third segment which serves as a Anchoring Fastener 66. The trigger fastener 62, the shaping fastener 64, and the anchor tie 66 intersect and are interconnected at a common point 68 from which they extend. The anchor clip 66 has a first end portion 70 attached to the airbag 14 (e.g., a rear panel 41 of the airbag) or a vehicle structure 12, such as the airbag module 30 (for example For example, the housing 34) or the dashboard 36, at an anchorage point 88. The shaping fastener 64 has a first end portion 72 fixed to the airbag 14, for example to the front panel 74 of the airbag 14 In the embodiment illustrated in FIGS. 1 and 2, the first end portion 72 of the shaping fastener 64 is connected to an upper portion 76 of the front panel 74 of the airbag 14. The trigger fastener 62 comprises a first end portion 78 fixed to the airbag 14, for example to the front panel 74 of the airbag 14. In the embodiment illustrated in FIGS. 1 and 2, the first end portion 78 of the airbag anchor 66 is r attached to a medial or lower portion 80 of the front panel 74 of the airbag 14. The middle / lower portion 80 of the front panel 74 to which the anchor clip 62 is connected has a large area and a large radius of curvature (see FIG. 1) compared with the area and radius of curvature of the upper portion 76 of the front panel to which the shaping fastener 64 is connected (see FIG. 2). The area and radius of curvature of the upper portion 76 may be several times smaller than the area and radius of curvature of the middle / lower portion 80. For the construction shown in Figures 1 and 2, the middle / lower portion 80 the front panel 74 exerts a force on the trigger fastener 62 which is greater than the force exerted on the shaping fastener 64 by the upper portion 76 of the front panel. As the airbag 14 inflates and expands, the gas pressure in the cushion acts perpendicular to the surface of the panels defining the inflatable volume 54 of the cushion. The gas pressure in the airbag 14, acting on the relatively large area of the middle / lower portion 80, exerts a proportionally large force on the trigger fastener 62. Conversely, the gas pressure acting on the relatively small area of the the upper portion 76 exerts a proportionately small force on the shaping fastener 64. For this reason, and given the three-legged configuration of the clip 60, as shown in FIG. 1, the clip becomes stretched between the panel before 74 and the anchor point 88 on a substantially straight line along the anchor clip 66 and the release clip 62. Accordingly, the force exerted on the shaping fastener 64 by the upper portion 76 is substantially overcome by the tension of the anchor clip 66 and the release clip 62, causing the forming clip to restrict the deployment of the top portion 76, which i gives the airbag 14 the shape shown in Figure 1.
[0006] According to the present invention, the adaptive fastener 60 responds to vehicle conditions, occupant conditions, or both vehicle and occupant conditions to accommodate the inflated condition of the airbag 14. In particular, 60 can adapt the inflation, deployment, configuration, shape, pressurization, or a combination thereof, the airbag 14. According to the embodiment of Figures 1 and 2, this command is implemented passively by means of the physical construction and configuration of the airbag 14 and the adaptive tie 60. In particular, in the embodiment of FIGS. 1 and 2, the airbag 14 and the adaptive tie 60 are constructed, configured , and arranged to adapt the inflated state of the airbag 14 according to whether the occupant 20 is retained, or not, by the seat belt 18 at the moment the airbag 14 is deployed. This is beneficial because, as described above and with reference to the data shown in Fig. 3, an unlapped occupant further penetrates the airbag 14 and at a different location on the cushion than an attached occupant. As shown in FIG. 1, in the case of an attached occupant, the seat belt 18 serves to help restrain the occupant 20. As a result, the attached occupant 20, particularly its lower trunk 90 and its hips 92, are retained to advance to the dashboard 36. This allows the airbag 14 to inflate and unfold with a relatively low resistance or opposition of the occupant 20. As shown dashed at 20 ', 35 the head 94 and the upper trunk 96 of the attached occupant penetrate into a central portion 100 of the airbag 14. The central portion 100 is disposed below an upper portion 102 of the airbag in the area where the portion of end 72 of the shaping fastener 64 is connected to the front panel 74. The central portion 100 is also disposed above a lower portion 104 of the air bag 14, in the area where the end portion 78 of the trigger clip It is connected to the front panel 74. As shown in FIG. 1, the degree to which, or the distance over, the occupant 20 'enters the air bag 14 may be comparatively or relatively small. As shown in FIG. 2, in the case of an unrestrained occupant 20, the seat belt 18 does not assist in restraining the occupant 20. As a result, the unattached occupant 15 and its lower trunk 90 and its hips 92, are not retained to advance towards the dashboard 36. Therefore, when the airbag 14 inflates and deploys in response to the collision of the vehicle, the entire body of the occupant moves without As shown in dotted line at 20 ', when this occurs, the unattached occupant 20 can also move upward as it moves toward the dashboard 36. This can occur for several reasons. The seating of the seat can be inclined upward from the rear to the front, therefore the occupant 20, moving forward on the seat cushion, also moves upwards. In addition, the occupant 20, moving forward, can also move from an inclined position to a straight position. In addition, the occupant 20 may take off from the seat (not shown) as it moves forward in the vehicle. As shown in dashed lines in FIG. 2, the occupant's head 94 enters the upper portion 102 of the airbag 14. The upper trunk 96 of the occupant enters the central portion 100 of the airbag 14. The lower trunk 90 of the occupant enters the lower portion 104 of the airbag 14. The degree to which, or the distance over, the occupant 20 'enters the airbag 14 may be comparatively or relatively large or substantial compared to the Attached occupant (see Figure 1). In view of the foregoing, it will be apparent to those skilled in the art that the clip 60 of the embodiment of Figs. 1 and 2 customizes the inflated condition of the airbag 14 depending on the wearing or non-wearing of the seatbelt. safety by the occupant 20 of the vehicle. In the case where the occupant 20 is attached, the clip 60 helps to maintain the configuration shown in FIG. 1, preventing the top portion 102 from expanding completely while allowing the lower portion 104 to fully deploy. As a result, the airbag 14 is initially deployed and maintained in the configuration of FIG. 1, which is a low volume configuration compared to the configuration of FIG. 2. The low volume configuration of the airbag 14 of FIG. requires a smaller volume of inflation fluid to achieve the desired inflation, deployment, and pressurization characteristics. This can help reduce the size and cost of the inflator and also help to ensure reliable inflation and deployment. With the unattached occupant being the worst case scenario, the inflator 32 is sized to produce a sufficient volume of inflation fluid to inflate, deploy, and pressurize the airbag 14 to the large volume inflated state of FIG. according to the desired performance parameters. Under these conditions, the volume of inflation fluid supplied by the inflator 32 is certainly sufficient to inflate, deploy, and pre.assure the airbag 14 to the small volume inflated state of Figure 1 according to the performance parameters. desired. Since the attached occupant is the expected condition, the attachment configuration of Figures 1 and 2 helps to enhance the reliability of the apparatus. In the case of the unfastened occupant, the airbag 14 initially inflates to the configuration in which the clip 60 retains the basic configuration shown in FIG. 1. The non-attached occupant 20, however, is not retained by the safety belt 18, moves to contact the lower portion 104, moves the lower portion to the dashboard 36, which relieves the force exerted on the release fastener 62 by the middle portion This causes the tension in the release clip 62 and the shaping fastener 64 between the front panel 74 and the anchor point 88 to drop. and the anchoring clip 66 to flex, which allows the force exerted on the shaping fastener 64 by the upper portion 76 of the front panel 74 to move the clip 60 to the state shown in the figure 2.
[0007] When this occurs, the clip 60 releases the upper portion 102 of the airbag 14 for full deployment to the position shown in FIG. 2. The upper portion 102, when in this position, is in place. to receive and cushion the occupant 20 'not attached. It will be apparent to those skilled in the art that the degree of release of the upper portion 102 of the inflatable cushion for deployment by the clip 60 is proportional to the degree with which the occupant 20 enters the airbag 14.
[0008] It will therefore be apparent to those skilled in the art that, advantageously, the fastener 60 of the present invention adapts the configuration of the airbag 14 according to whether the occupant 20 is retained, or not, by the safety belt 18. L Attach 60 customizes the configuration of the airbag 14 so that the airbag has a relatively small volume while covering the space where the attached occupant (Figure 1) strikes the airbag. In addition, the clip 60 personalizes the configuration of the airbag 14 so that the airbag has a relatively large volume while covering the space where the unrestrained occupant 20 (Figure 2) strikes the airbag. The airbag 14 of the embodiment of Figs. 1 and 2 also includes a vent 110 which is selectively operable to release the inflation fluid from the inflatable volume 54 of the airbag 14. The vent 110 includes a vent clip 112 and a guide clip 113 which cooperate to actuate the vent 110 in response to at least one vehicle or occupant condition at the time the airbag is deployed. The vent 110 can therefore selectively release the inflation fluid of the airbag 14 according to these conditions. The vent clip 112 has a first end portion 122 attached to the guide clip 113 and a second end portion 124 attached to the airbag 14. The first end portion 122 of the clip vent 112 includes a guide 123 formed integrally therewith in the form of a loop of material which defines an opening 125 (see Figure 5A). Alternatively, the guide 123 may have a metal or plastic construction and may be attached to the first end portion 122 of the vent clip 112 by ultrasonic welding, adhesives, heat sealing, or mechanical fasteners ( not shown). In another example, the guide 123 is in the form of a metal / plastic D-ring or a metal / plastic grommet or grommet reinforcing a hole or opening in the first end portion 122 of the In the embodiment of Figures 1 and 2, the second end portion 124 of the vent clip 112 is attached to the upper portion 76 of the front panel 74 of the air bag 14. More particularly, the second end portion 124 of the vent clip 112 may be connected to the upper portion 76 of the front panel 74 at or near the location where the end portion of the shaping fastener 64 is connected to the upper part. The vent 110 may have various configurations. Vent 110 of the embodiment illustrated in FIGS. 1 and 2 is detailed in FIGS. 5A to 5C. With reference to FIGS. 5A to 5C, the vent 110 includes a base 111 having one or more vent openings 114 formed in a panel 116, such as a side panel, of the airbag 14. A vent door 120 is attached to the side panel 116 of the airbag 14. The guide clip 113 has a first end portion 115 attached to the vent door 120 and a second end portion 117 attached to the base 111. The tie Guide 113 passes through the opening 125 of the guide 123 of the vent clip 112 so that the guide clip and the guide can slide relative to each other in the opening.
[0009] In other words, the guide clip 113 loops into the opening 125 of the guide 123 and is fixed at its two end portions 115, 117 to the vent 110. The vent door 120 is attached to panel 116 by known means (not shown), such as sewing, ultrasonic welding, heat sealing or adhesives. The vent 110 has an open state (Figure 1) in which the vent door 120 is spaced from the vent openings 114 and thus allows the inflation fluid to evacuate, that is to say flow through the vent openings. In the open state, the vent door 120 is bent away from the vent openings 114 and held in place by removable means (not shown), for example a tear seam. When the tension on the vent clip 112 and the attached guide clip 113 reaches a threshold level, the tear seam breaks, releasing the vent door 120 to allow the door to open. In the closed state, the vent door 120 covers the vent openings 114 and thus prevents the inflation fluid from evacuating the volume. inflatable 54.
[0010] The vent 110 is constructed and arranged to accommodate vehicle conditions, occupant conditions, or both vehicle and occupant conditions in the vehicle 12 as the air bag 14 is deployed. More particularly, the vent 110 is constructed and arranged to adapt to the occupant 20, depending on whether it is attached, OR not, at the time of an event for which inflation of the airbag 14 is desired. is because the vent clip 112, being connected to the upper portion 76 of the front panel 74 at or near the connection of the shaping fastener 64, is configured to be tensioned in response to the deployment of the upper portion. Therefore, this voltage is transferred to the vent door 120 by the guide clip 113 connecting the vent clip 112 to the vent door.
[0011] The actuation of the vent 110 is therefore dependent on the deployment of the upper part 76. The degree of actuation of the vent 110 depends on the degree of deployment of the upper part 76. The degree of deployment of the upper part 76 is different depending on whether occupant 20 blocks / allows deployment, which, in turn, depends on occupant position / size, seating position, and wearing or non-wearing of seat belt the occupant. According to the embodiment of Figs. 1 and 2, the vent 110 remains open and discharges the inflation fluid from the inflatable volume 54 in response to an attached occupant (Fig. 1). Keeping the vent 110 in the open state in the case where the occupant 20 is attached may be desirable. For example, since the attached occupant is retained by the seat belt 18, it may be desirable to produce a lower degree of airbag pressurization to achieve the necessary degree of energy dissipation and absorption. In addition, according to the embodiment of Figures 1 and 2, the vent 110 closes and prevents the inflation fluid 5 from evacuating the inflatable volume 54 in response to an unrestrained occupant 20 (Figure 2). Maintaining the vent 110 in the closed state in the event that the occupant 20 is not attached may also be desirable. For example, since the unrestrained occupant is not restrained by the seat belt 18, it may be desirable to produce a greater degree of airbag pressurization to achieve the necessary degree of dissipation and absorption of the airbag. 'energy. In view of the foregoing, it will be apparent to those skilled in the art that, in accordance with the present invention, the adaptive tie 60 and the vent 110, combined, serve to shape the airbag 14 and to evacuate the fluid. inflating the airbag in the case of an attached occupant, and serve to shape the airbag and prevent the inflation fluid from escaping in the case of an unattached occupant. Advantageously, the adaptive shaping and evacuation performed through the adaptive fastener 60 and the vent 110 are passively controlled and responsive without the need for active control of the occupant or the vehicle and without the need for active control. it is necessary to actively operate the fastener or the vent. The adaptive tie 60 and the vent 110 respond to the deployment of the airbag and how the occupant 20 hits the cushion. As another advantage, adjust the relative lengths of the adaptive clip 60 and the vent clip 112 or adjust the relative positions at which the adaptive clip and the vent clip are connected to the airbag 14, allows the airbag to be adapted to evacuate the inflation fluid from the airbag when the cushion has a predetermined shape defined by the shaping fastener 64. For example, the relative lengths of the fasteners 60 and 112, the relative positions at which the fasteners are connected to the airbag 14, or both the relative lengths and the relative connection positions of the fasteners, could be adapted so that the vent 110 prevents the evacuation of the inflation fluid at any time before, or up to that the airbag reaches the fully inflated and deployed state of Figure 2. Therefore, although the vent 110 is illustrated as preventing the evacuation of flu Inflating inflation when the airbag reaches the large volume state of Figure 2, the vent 110 could be adapted to prevent the evacuation of the inflation fluid when the airbag reaches any degree of inflation between the small state of inflation. FIG. 4 illustrates an adaptive fastener configuration that can be implemented in the embodiment of FIGS. 1 and 2 and, therefore, is Representative of fastener 60. As shown in FIG. 4, fastener 300 is a three-legged fastener which includes a first segment which serves as a release fastener 302, a second segment which serves as a fastener 304, and a third segment which serves as an anchor clip 306. The trigger clip 302, the form tie 304 and the anchor clip 306 intersect and are interconnected at a common point 308 from which they are connected. extend. The anchor clip 306 has a first end portion 310 for attachment to the airbag 14 or a vehicle structure 12, such as the airbag module 30 or the dashboard 36, at a point anchor. The trigger clip 302 has a first end portion 312 attached to the inflatable pad 14, for example to a lower portion of a front panel of the airbag. The shaping fastener 304 has a first end portion 314 for attachment to the airbag, for example an upper portion of the airbag front panel. As shown in FIG. 4, the first end portion 312 of the release fastener 302 and the first end portion 314 of the form fastener 304 have tapered configurations in which the end portions go into position. magnifying outward to extended end end edges 316 and 318, respectively. The enlarged end end portions 316 and 318 connect the trigger and shaping fasteners 302 and 304 to a wide portion of the front panel 74 of the air bag 14. This helps to distribute the forces applied to the front panel 74 by Trigger clip 302 and forming clip 304 over a large area of the front panel so that the fasteners fashion airbag 14 in a desired manner. Referring to FIGS. 5A-5C, as the airbag 14 expands, the vent clip 112 extends and tenses, as previously described, depending on vehicle conditions, occupant conditions, or conditions to both vehicle and occupant. The guide clip 113, being connected to the guide 123, is stretched when the vent clip 112 is stretched. In particular, as the airbag 14 expands, the guide clip 113 slides into the guide 123 and, finally, the vent clip 112 and the guide clip are stretched. The vent 110 is actuated and the vent door 120 is closed when the tension on the guide clip 113 reaches the threshold level. In the embodiment of Figures 1 and 2, the guide clip 113 cooperates with the guide 123 to increase the sensitivity with which the vent 110 is actuated while helping to prevent premature vent operation. With reference to FIG. 5A, the vent clip 112 is in a loose state prior to actuation of the airbag 14. This may, for example, be the condition of the airbag 14 and the vent 110 in the airbag. stored state of Figure 1. In this state, the guide 123 is placed adjacent to the connection of the guide clip 113 with the vent door 120. Upon actuation of the airbag 14, the cushion unfolding moves in the direction generally indicated at A. In response to this movement, the vent clip 112 is tensioned and the guide 123 slides along the guide clip 113 away from the vent door 120 in the direction A to the state shown in Figure 5B. Once the guide 123 reaches the position of FIG. 5B, the further deployment of the airbag 14 tends to both the vent clip 112 and the guide clip 113, and this tension acts on the seam of the airbag. tear that holds the vent door 120 in the open state. When the tension on the guide clip 113 reaches the predefined magnitude, the tear seam breaks, and the guide clip slides into the guide 123, allowing the guide clip, tie vent 112, and the vent door 120 to move to the closed state of Figure 5C. In this configuration, the guide clip 113 cooperates with the guide 123 to increase the sensitivity of the vent 110 to the deployment of the airbag 110. This sensitivity, referred to herein as "actuation sensitivity", relates specifically to the degree or at the air bag deployment distance which is necessary to actuate the vent 110. Thus, in the "closed actuated" configuration of the vent illustrated in FIGS. 5A to 5C, the actuation sensitivity of the vent 110 refers to the degree or distance of airbag deployment that is required to close the vent 110.
[0012] In the present description, the "actuating distance" for a vent refers to the distance that a vent element, such as a vent door, must travel in order to actuate the vent to the vent. state 5 completely open and / or completely closed. With reference to FIGS. 5B and 5C, the operating distance of the vent 110 is indicated generally at L1, and this distance refers to the distance over which the vent gate 120 moves from the non-actuated state (FIG. 5B) in the actuated state (FIG. 5C). In the embodiment of Figs. 5A to 5C, the movement of the vent door 120 over the actuating distance L1 is produced by the operation of the vent clip 112 and the guide clip 113 as described. above. In the configuration of Figs. 5A-5C, the guide clip 113 loops in the guide 123 in a manner similar to that of a tie or rope wrapped around a pulley. Operating in a very similar manner to a pulley, the movement or path of the vent clip 112 and guide 123 over a given distance in the A direction, here called "stroke", consumes or absorbs a length of the first segment. 115 of the guide clip 113 which is equal to twice the stroke. The actuation sensitivity of the vent 110 may thus be expressed as a ratio of the actuation distance of the vent to the stroke required to fully actuate the vent. In the embodiment illustrated in FIGS. 5A to 5C, the actuating distance is L1 and the stroke is L1 / 2, which is generally indicated at L2. The ratio of the actuating distance to the stroke, i.e. the actuation sensitivity, is therefore 2: 1. In other words, a distance of 2 vent door closing units 120 is produced by a distance of 1 stroke tie unit 112. Because of this decrease in actuation sensitivity, the stroke of Vent connector 112 necessary to produce sufficient guide clip consumption 113 to close vent 110 is less than half the operating distance. Since actuation of the vent 110 is unnecessary until the airbag 14 reaches a state completely, or substantially completely, deployed, the guide clamp consumption 113 can be delayed until the airbag reaches a degree of deployment which is higher than if the vent door 120 was actuated by a direct attachment connection to the inflating airbag. In other words, since the guide combination 123 / guide clip 113 requires a halved stroke to actuate the vent 110, the guide clip consumption can be delayed until the airbag 14 and the airbag attachment vent 112 extend further over a distance, that is, about half of the stroke. This delay results in a delay for the start of closure of the vent door 120 without this having an effect on the deployment time of the airbag 14. The airbag 14 is deployed as quickly and the vent closure can be realized at the same stage of deployment of the airbag. The vent 110 is actuated at a later stage of the deployment of the airbag 14, but closes twice as fast due to the doubling effect that the guide 123 has on the guide clip consumption 113. The sensitivity of Increased actuation of the vent 110 and the resulting delay have several advantages, namely that the length of the guide clip 113 is increased to delay the start of the guide clip consumption 113. This maximizes the indicated distance. generally at L3 in FIGS. 5A and 5B, that the guide 123 travels over the guide clip 113 before being stretched by, the airbag 14 being deployed. This distance is referred to herein as the "slack length" of the vent 110. Maximizing the slack length reduces the risk that the guide clip 113 will be stretched prematurely, for example during the initial phases of airbag deployment 14 when the folded and stored airbag, the vent clip 112, and the guide clip begin to unfold and expand. In addition, the increased operating sensitivity of the vent 110 increases the accuracy with which the airbag 14 and the vent can passively discriminate between different vehicle and / or occupant conditions. Since the increased actuation sensitivity reduces the stroke of the vent clip 112 required for actuation, the vent 110 and the airbag 14 may be configured to passively respond to smaller changes in the operating conditions. vehicle and / or occupant in the vehicle. For example, in a configuration in which the vent clip 112 is connected to an airbag panel, such as a front panel (see FIGS. 1 and 2), the vent 110 being actuated in response to the busting distance / dashboard (see graph of Figure 3), the difference between a vent operation and a non-venting operation would be halved compared to a configuration not including the increased actuation sensitivity configuration described here . Thus, for example, the vent 110 could respond to a difference in bust / dash distance of 50 mm instead of 100 mm, which, given the graph of Figure 3, is important since the difference between the crossing and the absence of crossing of the cushion is less than 50 mm at 25 mph (40.23 km / h) for a male occupant at the value of 50% and a female occupant at the value of 5% . Similar benefits could be gained to discern occupants sitting in front or at the back, attached or unattached occupants, and occupants who are in an incorrect sitting position.
[0013] In addition, the loop or pulley-like configuration of the guide clip 113 and the guide 123 advantageously increases the tension force on the vent clip 112 required to actuate the vent 110, which helps prevent premature operation of the vent. With reference to FIG. 5B, it is clear that when the vent clip 112 is stretched in the direction A by a force F, the tension force is evenly distributed between the two end portions 115, 117 of the fastener. in the direction A. In other words, half of the tension force F applied to the vent clip 112 acts on the first end portion 115, which acts on the vent door tear seam. 120, and half of the tension force F acts on the second end portion 117 attached to the base 111. Therefore, the degree of force F on the vent fastener 112 necessary to break the tear seam is multiplied by two compared to a configuration in which the vent clip is attached directly to the vent door 120. This construction is advantageous in that it helps to ensure that the vent door 120 does not operate. not until, or unless, the airbag ble 14 unfolds completely. In other words, the tear stitch and the pulley-like connection of the guide clip 113 and the guide 123 are configured such that any tension applied to the vent clip 112 before the full deployment of the pad Inflatable 14 is insufficient to break the tear seam of the vent door 120. Accordingly, premature actuation of the vent 110 can be avoided. The spatial orientation of the guide clip 113 and / or the vent clip 112 relative to the vent 110 may be adjusted to adjust the actuation sensitivity and / or the degree of tension force F on the vent fastener needed to operate the vent. Figure 5B illustrates that the end portions 115, 117 of the guide clip 113 extend at an angle θ with respect to each other. The angle θ imposes the manner in which the displacement of the vent clip 112, and the forces acting on it, are transferred to the guide clip 113 and, therefore, adjusting the angle θ varies the sensitivity of the actuation and / or the force F of vent actuation. Therefore, although the end portions 115, 117 are illustrated as being substantially parallel, i.e., the angle θ is approximately zero, it will be apparent to those skilled in the art that the angle 0 can be changed to meet the performance criteria. For example, the second end portion 117 of the guide clip 113 may be attached to the panel 116 at a left or right location relative to the position shown in FIG. 5B to increase the angle θ. Embodiment of the present invention is illustrated in FIGS. 6 and 7. Certain elements of FIGS. 6 and 7 are identical or similar to elements of FIGS. 1 and 2. The suffix "a" is added to the numerical references of these identical or similar elements. Figures 1 and 2 to avoid confusion. The embodiment of FIGS. 6 and 7 differs from the embodiment of FIGS. 1 and 2 in that the adaptive fastener 60 is omitted and the vent fastener and guide fastener for the airbag of FIGS. 7 cooperate to throttle the vent. Referring to Figures 6 and 7, the airbag 14a includes the vent attachment 112a for actuating a vent 160 to release the inflation fluid from the inflatable volume 54a of the airbag 14a. The vent clip 112a is operable to operate the vent 160 depending on the vehicle or occupant conditions in the vehicle 12a both at the time of deployment and during deployment of the airbag 14a. In the embodiment of FIGS. 6 and 7, the vent clip 112a comprises a single length of fastener material having a first end portion 122a connected to the guide clip 113a and a second end portion 124a connected to the airbag 14a at a connection 162. The second end portion 124a may, for example, be connected to the central portion 80a of the front panel 74a of the airbag 14a. The clip 112a operates in cooperation with the guide clip 113a and the front panel 74a to meet vehicle conditions, occupant conditions, or both vehicle and occupant conditions to control the vehicle. actuating the vent 160. In particular, the guide 123a on the vent clip 112a acts on the guide clip 113a, which throttles the vent 160 to help adjust the inflation, deployment, configuration, the shape, the pressurization, or a combination thereof, of the airbag 14a. In the embodiment of Figures 6 and 7, this control is implemented passively by means of the physical construction and configuration of the airbag 14a, the vent clip 112a, and the guide clip 113a. In particular, in the embodiment of FIGS. 6 and 7, the airbag 14a, the vent clip 112a, the guide clip 113a, and the vent 160 are constructed, configured, and arranged to throttle the airbag. vent and therefore adapt the inflation, deployment, and pressurization of the airbag 14a according to the penetration of the occupant in the airbag 14a. This is beneficial because the vehicle / occupant conditions, such as occupant size / weight, wearing or non-wearing the seat belt, seating position of the occupant (forward / rear, right / inclined), and vehicle speed all have an impact on the degree of penetration of the occupant into the airbag 14a. By adapting the airbag 14 passively in response to occupant penetration, it is not necessary to actively determine all of these factors because all of these factors are accounted for intrinsically and automatically by means of the configuration and construction of the airbag. In the description of the function of the vent 160, the terms "actuated", "not actuated", and "throttled" are used to identify different conditions of the vent. The actuated state of the vent 160 refers to the state of the vent when the fasteners 112a, 113a are fully tensioned due to, for example, the complete, or almost complete, deployment of the airbag 14a. The non-actuated state of the vent 160 refers to the condition of the vent when neither the vent clip 112a nor the guide clip 113a has been stretched by the deployment of the airbag 14a to a point sufficient to cause any significant change in the inflation fluid flow through the vent. The throttled state of the vent 160 refers to the state of the vent when the movement of the airbag has been prevented, for example due to an incorrect position of the occupant 20a, or has been altered by example because of the penetration into the airbag of an occupant, so that the flow of inflation fluid through the vent is changed. FIG. 6 illustrates (in solid lines) an occupant 20a, such as a male occupant, at the value of 50%, in a condition in a normal sitting position and attached, the vehicle seat 12a being in a condition in the middle position, (ie between a position completely forward and fully backward), right. As shown in FIG. 6, in the illustrated case of a male occupant, at the value of 50%, attached, the seat belt 18a serves to help restrain the occupant 20. As a result, the occupant 20 attached, is prevented from advancing towards the dashboard 36a. This allows the airbag 14a to inflate and deploy with relatively little resistance or opposition from the occupant 20a to a fully inflated and expanded state. The vent clip 112a is thus tensioned, which tends the guide clip 113a to place the vent 160a in its actuated state. In Fig. 6, as generally shown at 20a ', the attached occupant can lean forward and penetrate somewhat into the central portion 100a or upper portion 102a of the airbag 14a. The connection 162 does not move significantly in response to the penetration into the cushion of the upper part of the body of the male occupant 20a, at the value of 50%, attached in the middle position. As shown in FIG. 6, however, the degree to which or the distance over which the occupant 20a 'enters the airbag 14a may be comparatively or relatively small. If circumstances, such as the severity of the event, seatbelt tension 18a or occupant position 20a at the time the event occurs, result in greater penetration of the occupant, the connection 162 can move to the dashboard 36a and the vent 160 can be throttled. Otherwise, the vent 160 may remain in its (fully) actuated state and the airbag 14 has its desired effect of damping and lengthening the occupant downtime. In the illustration of Figure 6, the occupant 20a does not significantly penetrate the central portion 100a of the airbag 14a where the connection 162 of the vent clip 112a is located. Therefore, in the case of a male occupant, at 50%, illustrated in Figure 6, the central portion 100a of the airbag 14a including the connection 162 is fully deployed, the fasteners 112a and 113a are tend, and the tensioned fasteners actuate the vent 160. This can be compared with the small occupant, for example the female occupant, at the value of 5%, which is indicated dotted at 20a ".
[0014] FIG. 7 illustrates (in solid lines) an occupant 20a, such as a female occupant, at the value of 5%, in a condition in a normal sitting position and attached, the vehicle seat 22a being in a condition in position forward, right. The conditions of FIG. 7 are identical to those of FIG. 6, except that the occupant is smaller and the vehicle seat 22a is in the forward position. In Fig. 7, the seat belt 18a serves to help prevent the occupant 20a from moving towards the dashboard 36a. As shown in dotted line at 20a ', similarly to FIG. 6, the female occupant, at the 5% value, attached, can lean forward and enter the airbag 14a.
[0015] Figure 7 illustrates that the forward position of the vehicle seat 22a can significantly change the deployment of the airbag 14a. The forward position of the vehicle seat 22a places the occupant 20a closer to the dashboard 36a so that the occupant prevents the airbag 14a from reaching the fully inflated and deployed position. As a result, other conditions being equal, the female occupant, at the 5% value, in Figure 7 can penetrate relatively more into the cushion than the male occupant, at a value of 50% ( illustrated in dotted line in 26). Therefore, in the case of the female occupant, at the value of 5%, illustrated in Figure 7, the airbag 14a and the connection 162 can not achieve full deployment. Consequently, the fasteners 112a, 113a can not completely operate the vent 160. The vent 160 is therefore passively throttled according to the vehicle and occupant conditions which place the occupant 20a as shown in FIG. 7. It will appear to the art man that the difference in sitting position forwards / backwards between the male occupant, at the value of 50%, and the female occupant, at the value of 5% in Figure 7 may not be high. The difference may, for example, be as little as 50 mm. Given, however, that it is the small, 5% forward-facing female occupant (Figure 7) that further penetrates the airbag 14a, it is desirable to ensure that the vent 160 is strangled efficiently and reliably. It is also desirable for the vent 160 to be throttled differently in the case of the male occupant, 50% tall, in the medial / aft position (Figure 6) which does not significantly penetrate the airbag. 14a. This can be difficult, given the small difference in positions of the two occupants.
[0016] To account for this, the guide clip combination 113a / vent clip 112a and the position of the connection 162 not only allow the throttle 160 to be throttled, but also to adjust the throttle sensitivity. The vent 160 has an open state (for example completely open), a closed state (for example completely closed), and states between these two extremes in which the vent is partially open / closed. The term "throttling" as used herein is meant to refer to the degree to which the vent clip 112a and the guide clip 113a are configured for displacement and / or response voltage settings. at the penetration of the occupant into the cushion, control, that is to say, strangling, in correspondence, the degree to which the vent 160 is open / closed. As the vent 160 moves between the fully open and fully closed state, and vice versa, the degree to which the vent is actuated (i.e., the opening percentage or the closing percentage) changes. The term "actuating sensitivity" as used herein means the degree to which, or the rate at which, the vent 160 is throttled in response to a given change in displacement / tension of the fasteners 112a, 113a. As described above, the movement of the fasteners 112a, 113a corresponds to the degree of occupant penetration into the airbag 14a at the location where the connection 162 is located on the first panel 74a. Therefore, a vent attachment 112a, guide clip 113a, and vent configuration 160 with a relatively high actuation sensitivity would result in a relatively large change in the throttling of the vent in response to a change. given displacement / tension of the fasteners. Similarly, a vent attachment 112a, guide clip 113a, and vent configuration 160 with a relatively small throttling sensitivity would result in a relatively small change in the throttling of the vent in response to the same given change of displacement / tension of the fasteners. In the present description, the throttle sensitivity is quantified by a ratio of the displacement of the vent clip 112a and the guide clip 113a to the penetration distance into the airbag 14a by the occupant 20a (DT: dp). In the embodiment of FIGS. 6 and 7, it will be noted that the fasteners 112a, 113a remain tensioned even if, in FIG. 7, the occupant 20a enters the airbag 14a and moves the connection 162. This is due the vent 160 itself absorbs the slack in the vent fastener 112a and the guide fastener 113a while the occupant 20a enters the airbag 14a and the vent is throttled between the fully open position and the position completely closed. The vent 160 may be configured such that the actuated state of the vent is an open state or a closed state. In the present description, a vent 160 "open-actuated" is closed at the time of deployment, and an unhindered deployment of the airbag tends the vent clip 112a and the guide clip 113a to actuate the vent (substantially or completely) open. The penetration of the occupant into the protective device again throttles the vent 160 to the closed state. In addition, in the present description, a "closed-actuated" vent 160 is open at the time of deployment, and unimpeded deployment of the airbag tends the fasteners 112a, 113a to actuate the vent (substantially or completely) closed. The penetration of the occupant into the protection device again throttles the vent 160 to the open state. It will be apparent to those skilled in the art that the selection of an open or closed actuated vent configuration can be based on various factors, such as the position of the airbag (passenger frontal cushion / driver's front cushion) and the desired characteristics of damping and lengthening of the dwell time of the occupant. In other words, the vent 160 can have any configuration "actuated open" or "actuated closed" which is adapted to perform, with the vent attachment 112a and the guide clip 113a, a constricted evacuation as described above. Referring to Figure 8A, when the airbag 14a is fully inflated and deployed, the fasteners 112a, 113a are fully tensioned and fully actuate the vent 160. The vent 160 is configured such that an operable vent portion (Not shown in Figs. 8A-8C), which controls the flow of fluid through the vent, is biased to move in response to inflation fluid pressure in the airbag 14a. The inflation fluid pressure in the airbag 14a urges the vent 160a to the non-actuated state. The fasteners 112a, 113a are configured such that the tension on the vent clip acts on the guide clip to bias the actuable vent portion toward the actuated state against the inflation fluid pressure. in the airbag 14a. Therefore, when the airbag 14a is fully inflated and deployed, the fasteners 112a, 113a overcome the stress that the inflation fluid pressure places on the vent portion and set the vent 160 to the fully actuated state.
[0017] In this actuated state, the occupant 20a is spaced from the airbag 14a and must move forwardly to contact the airbag 14a and enter the cushion. This distance can be measured in terms of occupant bust / instrument panel distance, which is indicated in D1 in FIG. 8A. The distance that the occupant 20a must travel before this contact takes place may vary depending on the seating position / occupant prior to deployment of the airbag. When the vent 160 is throttled due to the penetration of the occupant into the cushion, the fasteners 112a, 113a are stretched directly between the front panel of the airbag 14a and the vent 160. Referring to FIG. occupant 20a has moved forward from the position illustrated in FIG. 8A. The bust / dash distance, when this occurs, is indicated at D2 in Figure 8B. The occupant 20a enters the airbag 14a and begins to move the fasteners 112a, 113a, which allows the operable vent element to move in response to the fluid pressure in the airbag 14a, thus strangling the airbag. Vent 160. When the vent 160 is throttled between the actuated and non-actuated states, the tension on the vent clip 112a and the guide clip 113a is maintained. As the degree of penetration into the occupant's cushion increases, the constriction of the vent 160 adjusts accordingly. Referring to Figure 8C, the occupant 20a has fully penetrated airbag 14a, having moved forward from the position shown in Figure 8B. The bust / dash distance, when this occurs, is indicated at D3 in FIG. 8C. Once the occupant 20a enters the airbag 14a to such a degree that the vent 160 is completely throttled to the non-actuated state, the tension on the fasteners 112a, 113a is released, i.e. that the vent clip 112a and the guide clip 113a are loose. At this point, since the vent 160 is in the non-actuated state, further penetration into the cushion has no effect on the vent. If, for one reason or another, the occupant 20a moves in a direction that reverses the penetration, and the inflation fluid pressure in the airbag 14a remains sufficient, the fasteners 112a, 113a could again be strained and the throttling of the vent could resume. The vent 160a may be an open vented vent or a closed vented vent. Examples of open and closed operated actuated vent types are illustrated and described herein with reference to Figs. 10A-10C and 11A-11C, respectively. The selection of an open or closed actuated vent configuration may be based on various factors, such as the position of the airbag (driver's front cushion / passenger's front cushion) and the desired characteristics of damping and elongation downtime of the occupant. The actuated, un-actuated, and throttled states of the vents of FIGS. 10A-10C and 11A-11C correspond to the vehicle and occupant conditions illustrated in FIGS. 8A-8C according to Table 1: Table 1 State of Vent Vent Actuated Figure 9A to 9C Open Actuated Closed Figure Figure 10A to 10C Actuated Open Closed Figure 8A Strangled Between Open and Closed Between Open and Closed Figure 8B Not Actuated Closed Open Figure 8C In accordance with the present invention, air bag configurations 14a, The vent port 112a, vent terminal 112a, and guide clip 113a described herein are advantageously configured and customized for adaptive multiphase evacuation. The construction of the vent 160 (see, for example, the vent 200 of Figs. 10A-10C or the vent 260 of Figs. 11A-11C), in combination with the various vent attachment configurations 112a and attachment of 113a illustrated and described here, allow adaptation not only with respect to the degree of constriction of the vent in response to the penetration of the occupant into the cushion but also with respect to the response of the vent before the penetration of the occupant in the cushion, the throttle response time once the occupant enters the cushion, and the vent response as a function of vehicle / occupant conditions prior to penetration. The apparatus 10a has a plurality of configurable elements that assist in providing multi-phase adaptive evacuation functionality. Figure 9 illustrates the multi-phase adaptive evacuation feature of the apparatus 10a of 8A-8C, which includes a single segment vent attachment 112a. The graph of Figure 9 illustrates the occupant's penetration into the cushion in terms of occupant bust / dash distance versus time, where time equals zero at the beginning of the collision event that triggers. the deployment of the airbag 14a. The various areas of the graph, which are delineated by bold lines, indicate the various states of vent which, once the airbag 14 has deployed, depend on the occupant bust / dash distance. At time = 0, vent 160 is in the non-actuated state. Unimpeded, the vent 160 is configured to switch to the actuated state in 20 ms. Figure 9 illustrates how the apparatus 10a of the present invention is configured between the three states / phases of vent actuation - unpowered, powered, and throttling - in response to the vehicle and occupant conditions that are calibrated relatively at the penetration of the occupant into the cushion, i.e., relative to the occupant bust / instrument panel distance. The graph of Fig. 9 and the illustrated graph areas are therefore specific to the configuration shown in Figs. 8A-8C. Thus, as shown in FIG. 9, once the airbag 14a is deployed, the occupant penetration into the cushion (i.e., the bust / dash distance) from 600 mm to about 330 mm has no effect on the vent 160a, and the vent remains in the actuated state. The penetration of the occupant into the cushion from about 330 mm to about 220 mm throttles the vent 160a from the actuated state to the non-actuated state. Once the occupant penetration into the cushion reaches about 220 mm, the vent 160a reaches the non-actuated state and remains in the un-actuated state as long as the occupant penetration into the cushion is approximately less than or equal to 220 mm. The various lines indicated A through G in Fig. 9 illustrate the operation of the apparatus 10a in response to various vehicle and occupant conditions at the time of deployment of the airbag 14a of Figs. 8A-8C. The indicated line A in FIG. 9 corresponds to an attached occupant 20a with a fully forward seating position which produces an initial bust / dash distance (see FIG. 8A) of about 380 mm. It corresponds to a female occupant, at the value of 5%, attached. As shown in Fig. 9, the apparatus 10a is configured to respond to the occupant fully forwardly attached, the vent 160 rapidly passing to the throttling state (i.e., 15ms approximately, at time -35 ms, see FIG. 8B). The vent 160 is throttled and reaches the non-actuated state in 35 ms, at time -70 ms). The occupant enters the airbag 14a, reaching a maximum penetration of about 220 mm, bust / dash distance, at -75 ms (see Figure 8C). The occupant 20a then bounces and the vent 160a is again throttled at -90 msec time-actuated state -125 ms time. If there is sufficient pressure in the airbag 14a, the vent 160 can be throttled again to the actuated state. Any further impact with the airbag 14a would therefore take place with the vent 160 in the activated state, and any further extension of the occupant stopping time would continue with the vent choke to the state not actuated to the penetration values imposed by the configuration of the apparatus 10a (i.e., throttling at the bust / instrument panel distance of 330 mm, and the non-actuated state at -220 mm). The indicated line B in Fig. 9 corresponds to an unattached occupant 20a in a fully forward seating position which produces an initial bust / dash distance of about 380mm. It corresponds to a female occupant at the value of 5%, not attached. As shown in Fig. 9, the apparatus 10a is configured to respond to the unbonded occupant fully forward, the vent 160a rapidly passing to the throttling state (i.e. ms about, at time -30 ms). The vent 160 is throttled and reaches the non-actuated state in about 20 ms, at time -50 ms). The occupant enters the airbag 14a, reaching a maximum penetration of about 40 mm, bust / dash distance, at -90 ms. The occupant 20a then bounces and the vent 160 is again throttled at time -160 ms to the state activated at time -200 ms. If there is sufficient pressure in the airbag 14a, the vent 160 can be throttled again to the actuated state.
[0018] The indicated line C in FIG. 9 corresponds to an attached occupant 20a with a medial seating position, between a completely forward position and a fully backward position, which produces an initial bust / dash distance (see FIG. 8A) of about 470 mm. It corresponds to a male occupant, at the value of 50%, attached. As shown in Fig. 9, the apparatus 10a is configured to respond to the centrally attached occupant, the vent 160 passing to the throttling state (i.e., in about 35ms, at time -55 ms, see Figure 8B). The vent 160 is throttled and reaches the non-actuated state in about 25 ms, at time -80 ms). The occupant enters the airbag 14a, reaching a maximum penetration of about 200 mm, bust / dash distance, at -90 ms (see Figure 8C). The occupant 20a then bounces and the vent 160 is again throttled at time -110 ms until the state activated at time -140 ms. If there is sufficient pressure in the airbag 14a, the vent 160 can be throttled again to the actuated state. Any further impact with the airbag 14a would therefore take place with the vent 160 in the activated state, and any further extension of the occupant stopping time would continue with the vent choke to the state not actuated to the penetration values imposed by the configuration of the apparatus 10a (i.e., throttling at the bust / instrument panel distance of -330 mm, and non-actuated state at -220 mm). The indicated line D in FIG. 9 corresponds to an unattached occupant 20a with a medial seating position, between a completely forward position and a fully backward position, which produces an initial bust / dash distance of about 470 mm. It corresponds to a male occupant, at the value of 50%, not attached. As shown in Fig. 9, the apparatus 10a is configured to respond to the unattached occupant in the middle position, the vent 160 passing to the throttling state (i.e., in about 30ms, at time -50 ms). The vent 160 is throttled and reaches the non-actuated state in about 10 ms, at the time -60 ms). The occupant 5 enters the airbag 14a, reaching a maximum penetration of about -30 mm, bust / dash distance, at time -110 ms. Penetration of -30 mm indicates that the unattached occupant 20a hits the dashboard 36a. The occupant 20a then rebounds and the vent 160 is again throttled at time> 200 ms to the actuated state. If there is sufficient pressure in the airbag 14a, the vent 160 can be throttled again to the actuated state. The indicated line E in Fig. 9 corresponds to an attached occupant 20a with a fully backward seating position, which produces an initial bust / dash distance (see Fig. 8A) of about 560 mm. It corresponds to a male occupant, at the value of 50%, attached. As shown in FIG. 9, the apparatus 10a is configured to respond to the centrally attached occupant, the vent 160 passing to the throttling state (i.e., in about 50ms, at time -70 ms, see Figure 8B). The vent 160 is throttled and reaches the non-actuated state in about 20 ms at -90 msec. The occupant enters the airbag 14a, reaching a maximum penetration of about 200 mm, bust / dash distance, at -110 ms (see Figure 8C). The occupant 20a then bounces and the vent 160 is again throttled at time -125 ms to the state 30 activated at time -150 ms. If there is sufficient pressure in the airbag 14a, the vent 160 can be throttled again to the actuated state. Any further impact with the airbag 14a would therefore take place with the vent 160 in the activated state, and any further extension of the occupant stopping time would continue with the vent throat to the state not actuated to the penetration values imposed by the configuration of the apparatus 10a (ie throttling at the bust / instrument panel distance of -330 mm, and non-actuated state at -220 mm).
[0019] The indicated line F in Fig. 9 corresponds to an unattached occupant 20a with a fully backward seating position which produces an initial bust / dash distance of about 560 mm. It corresponds to a male occupant, at the value of 50%, not attached. As shown in Fig. 9, the apparatus 10a is configured to respond to the unrestrained occupant in a rearward position, the vent 160 passing to the strangling state (i.e. ms about, at time -60 ms). The vent 160 is throttled and reaches the non-actuated state in about 10 ms at time -75 ms). The occupant enters the airbag 14a, reaching a maximum penetration of about -100 mm, bust distance / dashboard, time -120 ms. The penetration of -100 mm indicates that the unattached occupant 20a hits the dashboard 36a. The occupant 20a then bounces and the vent 160 is again throttled at time> 200 ms to the actuated state. If there is sufficient pressure in the airbag 14a, the vent 160 can be throttled again to the actuated state.
[0020] The line indicated G in Figure 9 corresponds to an occupant 20a leaning forward against the dashboard 36a at time = 0. As shown in Figure 9, the apparatus 10a responds to the incorrect position of the occupant with the vent 160 remaining in the non-actuated state of the time = 0 at -25 ms, the incorrect position preventing the deployment of the airbag. At time -25 ms, the vent 160 is throttled due to the deployment of the airbag and the occupant is removed from the dashboard 36a. At the time. -50 ms, the vent 160 reaches the actuated state and remains in this state beyond time = 200 ms. Any additional impact with the airbag 14a would therefore occur with the vent 160 in the activated state, and any further extension of the occupant stopping time would continue with the vent choke to the state not actuated to the penetration values imposed by the configuration of the apparatus 10a (i.e., throttling at the bust / instrument panel distance of -330 mm, and non-actuated state at -220 mm). The configuration of the apparatus 10a may have an effect on the functionality of the vent 160. The effective area of the vent openings in the vent 160 determines the volumetric discharge rate of inflation fluid per unit of distance. penetration / throttling and, therefore, the construction of the vent itself customizes the throttling effect on the evacuation. This customization includes an adjustment of when the vent restriction begins and ends, the degree of penetration required to begin throttling, the degree of penetration required to completely constrict the vent, and the rate at which the fluid inflation flows through the vent during throttling. Examples of specific vent constructions 160 for use with the airbag 14a of Figures 6 and 7 are shown in Figures 10A-10C and Figures 11A-11C, respectively. With reference to FIGS. 10A-10C, the vent 160 is an open-actuated vent 200 that is operable to release the inflation fluid from the airbag 14a. In this embodiment, the inflation fluid pressure in the airbag 14a serves to place / maintain the vent 200 in the closed state at the time of deployment. The structure of the open actuated vent 200 is schematically illustrated in Figs. 10A-10C. The vent 200 has a generally conical configuration, forming a duct extending through an opening 216 in a panel or wall 214 of the airbag 14a, such as the side panel. The opening 216 has a shape that fits with the cross-sectional shape of the vent 200 at its interface with the wall 214. Therefore, in the embodiment of Figs. 10A through 10C, the opening 216 in the airbag wall 214 is circular.
[0021] With reference to FIGS. 10A to 10C, the vent 200 comprises a first part comprising a conical inner wall 202 forming a venting door or a venting element and a second part comprising a frustoconical outer wall 204. The inner and outer walls 202 and 204 share a common central axis 206. As shown in FIGS. 10A-10C, respective base portions 210 and 212 of the inner and outer walls 202 and 204 meet at the airbag wall 214 where they are located. connected to the airbag 14a around the periphery of the opening 216 in the wall 214. As shown in FIGS. 10A-10C, the inner and outer walls 202 and 204 may have congruent, or substantially congruent, configurations in which their respective base portions 210 and 212 have equal or substantially equal diameters, and the respective walls extend at equal or substantially equal angles relative to each other. The inner wall 202 tapers from the base portion 210 and extends away from the airbag wall 214 into the inflatable volume of the airbag 14a. The outer wall 204 tapers from the base portion 212 and extends away from the airbag wall 214 and away from the airbag 14a outside the inflatable volume 30 of the airbag 14a, ending at level of a closed end portion 224. The frustoconical outer wall 204 has an open end portion 220 which defines an outlet 222 of the vent 200. The outer wall 204 defines a passage or discharge chamber 234 through which the inflation fluid can flow in the path of the outlet 222.
[0022] The inner wall 202 includes a plurality of vent openings 232 spaced apart around the circumference of the inner wall. In the embodiment illustrated in FIGS. 10A-10C, the openings 232 have a generally circular shape. The openings 232 could, however, have other configurations. For example, the apertures could include elongate slots, X-slots, cross slots, T-slots, Y-slots, or other appropriately shaped openings.
[0023] The guide clip 113a connects the first end 122a of the vent clip 112a to the vent 200. More particularly, the first end portion 115a of the guide clip 113a is attached to the base portion 212. The second end portion 117a is attached to the closed end portion 224. The guide clip 113a extends, and is slidably received, into the opening 125a in the first end 122a of the clip 112a. . The guide clip 113a therefore loops into the opening 125a of the guide 123a on the vent clip 112a and is secured at its two end portions 115a, 117a to the vent 200. Opened vent 200 has an open actuated state illustrated in Fig. 10A, a throttled intermediate state shown in Fig. 10B, and a closed non-actuated state illustrated in Fig. 10C. As the airbag 14a expands, the vent clip 112a extends and tenses as previously described with respect to vehicle conditions, occupant conditions, or both vehicle and occupant conditions. The guide clip 113a, being connected to the guide 123a, is tensioned when the vent clip 112a is stretched. In particular, as the airbag 14a deploys, the guide 123a moves the loose length L3 on the guide clip 113a before an ultimate tension. The vent 200 is throttled when the vent door 202 moves over the actuating distance L1 due to the displacement of the vent fastener 112a on the stroke L2. The vent 200 is actuated to the open state when the vent door 202 reaches the end of the actuating distance L1 due to the movement of the vent fastener 112a until the end of the stroke. L2. In the open actuated state of Fig. 10A, the vent clip 112a acts on the guide clip 113a to actuate the vent 200, otherwise tending or otherwise exerting traction / holding on the inner wall 202 in the open state, being, at least in part, within the inflatable volume 54a of the airbag 14a. The tensioned fasteners 112a, 113a act against the inflation fluid pressure in the airbag 14a, which urges the inner wall out towards the closed state of FIG. 10C. The fasteners 112a, 113a are completely stretched and are not displaced by a penetrating occupant in the cushion. The state of the vent 200 illustrated in FIG. 10A thus corresponds to the fully inflated and deployed state illustrated in FIG. 8A and described with reference to FIGS. 8A to 8C. In this state, the fasteners 112a, 113a substantially or completely prevent the inner wall 202 from entering the discharge chamber 234. In the open state, fluid communication is established between the inflatable volume 54a and the atmosphere surrounding the airbag 14a through the vent openings 232, the discharge chamber 234, and the outlet 222. In the strangled state of Figure 10B, the tension on the fasteners 112a, 113a is maintained but, due to the penetration of an occupant into the cushion, the airbag 14a did not reach the fully inflated and deployed state. The state of the vent 200 illustrated in FIG. 10B thus corresponds to the state of partial penetration of the occupant, illustrated in FIG. 8B and described with reference to FIGS. 8A to 8C. Given the configuration of the vent 200, the pressure of the inflation fluid in the airbag 14a brings the inner wall 202 into the discharge chamber 234. In the state of FIG. 8B, the inner wall 202 is put into a a throttled state in which the inner wall is partially inverted in the discharge chamber 234, closing off a portion of the vent openings 232 (shown in dotted lines) and leaving open the remaining vent openings (shown in solid lines). The vent 200 thus throttles the inflating fluid flow through the partially fluid openings 232 of the wall and prevents it from becoming clogged / partially open. The inflation pressure in the airbag 14a internal press 202 against the sealed openings 232 thus an effective seal for the flow through these openings.
[0024] In the closed state of FIG. 10C, the fasteners 112a, 113a do not tense or otherwise do not pull / hold on the inner wall 202 in the open state within the inflatable volume 54a of the cushion inflatable 14a. In this state, the guide 123a can be placed along the loose length L3. The non-actuated state of the vent 200 illustrated in FIG. 10C thus corresponds to the high penetration state of the occupant in the cushion, illustrated in FIG. 8C and described with reference to FIGS. 8A to 8C. The inner wall 202 is therefore free to move in response to the inflation fluid pressure in the inflatable volume 54a of the airbag 14a. Under the pressure of the inflation fluid in the inflatable volume 54a, the inner wall 202 moves to a closed state located, at least in part, within the discharge chamber 234 delimited by the outer wall 204. In FIG. closed state, the inner wall 202 is inverted from the open state. Since the inner wall 202 and the outer wall 204 have congruent, or substantially congruent, configurations, the inner wall 202, when in the closed state, snaps, covers, and follows the contour of the outer wall 204, which forms a tight and narrow fit between the walls. The pressure of the inflation fluid in the airbag 14a maintains this adjustment and the resulting seal which prevents the flow of inflation fluid through the openings 232. In the closed state of the vent 200, the openings vent 232 are placed against corresponding portions of the outer wall 204. Since the conical inner wall 202 is closed at the end portion 224, the inflation fluid pressure in the airbag presses the wall portions. internal wall 202 surrounding the vent openings 232 against the corresponding portions of the outer wall 204. Accordingly, the outer wall 204 constrains the inner wall 202 and blocks, or substantially blocks, the fluid communication between the inflatable volume and the surrounding atmosphere the airbag 14a. The inflation fluid discharge is thus prevented in the closed, non-actuated state of the vent 200. Referring to FIGS. 11A to 11C, the vent 160 is a closed, activated vent 260 which is operable to retain the inflation fluid in the airbag 14a. In this embodiment, the inflation fluid pressure in the airbag 14a serves to place / maintain the vent 260 in the closed state at the time of deployment. The structure of the closed actuated vent 260 is schematically illustrated in FIGS. 11A-11C. The vent 260 includes one or more vent openings 262 formed in a panel 264, such as a side panel, of the air bag 14a. A vent door 266 is attached to the side panel 264 and covers the openings 262. The vent door 266 has one or more vent openings 272 therein. In the embodiment illustrated in FIGS. 11A to 11C, vent door 266 includes two vent openings. 272. A web 274 of the vent door 266 material placed between the vent openings 272 mutually connects opposed louver flaps 276 of the vent door. The vent door 266 thus serves as an operable vent element. The first end portion 115a of the guide clip 113a is attached to the band 274. The second end portion 117a of the guide clip 113a is attached to the side panel 264, which serves as the base of the vent. 260. The guide clip 113a loops through the guide 123a on the first end portion 122a of the vent clip 112a to slidably connect the fasteners to each other. The vent door 266 is attached to the panel 264 by known means, such as sewing, ultrasonic welding, heat sealing or adhesives. In the illustrated embodiment, the vent gate 266 itself comprises separate panels 270 of material which are secured to each other by known means, for example by stitching, to give the vent door the illustrated configuration. It will be apparent to those skilled in the art that the vent door 266 could have single panel or multiple panel construction variants. The closed actuated vent 260 has a closed actuated state illustrated in Fig. 11A, an intermediate throttled state shown in Fig. 11B, and an open non-actuated state illustrated in Fig. 11C. As the airbag 14a expands, the vent clip 112a extends and tenses, as previously described, depending on vehicle conditions, occupant conditions, or both vehicle and occupant conditions. . The guide clip 113a, being connected to the guide 123a, is tensioned when the vent clip 112a is stretched. In particular, as airbag 14a unfurls, guide 123a moves loose length L3 on guide clip 113a before ultimate tension, vent clip 112a and tie guidance being finally both strained. The vent 260 is throttled when the vent door 266 moves over the actuating distance L1 due to the displacement of the vent fastener 112a on the stroke L2. The vent 260 is actuated to the open state when the vent door 266 reaches the end of the actuating distance L1 due to the movement of the vent clip 112a until the end of the stroke. L2. In the closed state of Figure 11A, the vent 260 has a closed state in which the fasteners 112a, 113a are tensioned and are not displaced by a penetrating occupant in the cushion. In this state, the guide 123a can be placed along the loose length L3. The state of the vent 260 illustrated in FIG. 11A thus corresponds to the fully inflated and deployed state illustrated in FIG. 8A and described with reference to FIGS. 8A to 8C. In the closed state of Fig. 11A, the tensioned fasteners 112a, 113a extend along the airbag panel 264. In this state, the cover flap portions 276 of the vent door 266 are tensioned, for example along the airbag panel 264. The shape and size of the cover flap portions 276 are configured so that, when tensioned, they close the vent openings 272 of the vent door 266 and cover the opening 262 in the airbag panel 264. In the closed state of the vent 260, the vent door 266 thus prevents the inflation fluid from leaving the airbag 14a. In the strangled state of FIG. 11B, the fasteners 112a, 113a are stretched but somewhat displaced by an occupant penetrating the cushion. The state of the vent 260 illustrated in FIG. 11B thus corresponds to the partial penetration state of the occupant in the cushion illustrated in FIG. 8B and described with reference to FIGS. 8A to 8C. In this strangled state, the movement of the fasteners 112a, 113a caused by the partial penetration of the occupant into the cushion, indicated generally by the arrow B, allows the flap portions forming lids 276 of the vent door 266 to bulge into position. part and adopt a somewhat convex configuration. This allows the cover flap portions 276 of the vent door 266 to partially open the vent openings 272 under the pressure of the inflation fluid in the airbag 14a. Therefore, in the throttled state of Fig. 11B, the vent 260 discharges the inflation fluid at a reduced flow rate, i.e., throttling. In the open state of Fig. 11C, due to displacement by a penetrating occupant in the cushion in the direction B, the vent clip 112a and the guide clip 113a are not stretched. In this state, the guide 123a can be placed along the loose length L3. The state of the vent 260 illustrated in FIG. 11C thus corresponds to the high penetration state of the occupant in the cushion, illustrated in FIG. 8C and described with reference to FIGS. 8A to 8C. In the open state of Fig. 11C, the fasteners 112a, 113a are slackened or slack, allowing the cover flap portions 276 of the vent door 266 to bend completely and to assume a convex configuration. In this state, the vent openings 272 are open due to the inflation fluid pressure in the airbag 14a and thus release the inflating fluid of the airbag 14a through the openings 262 and 272.
[0025] Similar to the embodiment of FIGS. 1 and 2, the looping guide fastener 113a, slidably connected to the guide 123 and used with the vents 160 of FIGS. 10A-10C and FIGS. 11A-11C, advantageously increases the actuation sensitivity of the vents 160 by providing a ratio of the actuating distance L1 to the stroke L2 of 2: 1. The looping guide clip 113a and the guide 123 also help prevent premature actuation of the vents 160 by 1) increasing the tension force F on the vent clip 112a required to actuate the vent, and 2) adding a loose length L3 to the vents.
[0026] A third embodiment of the present invention is illustrated in FIG. 12. Certain elements of FIG. 12 are identical or similar to elements of FIGS. 6 and 7. The suffix "b" is added to the numerical references of these identical elements or similar to Figures 6 and 7 to avoid confusion. The embodiment of FIG. 12 differs from the embodiment of FIGS. 6 and 7 in that the vent 160b is located closer to the front panel 74b of the air bag 14b and is connected to the rear panel 41b or the side panel 264b of the airbag by an adaptive vent clip 112b for its actuation. In addition, the guide clip 113b of Fig. 12 is integrally formed with the vent 160b. Similar to the guide clip 113a and the guide 123a of the embodiment of Figs. 6 and 7, the looped vent clip 112 used with the guide 123b of Figs. 14A through 14C and Figs. 15A through 15C provide favorably a mechanical advantage both for closing and opening the vent 160b as described above. In the embodiment of Fig. 12, the adaptive vent fastener 112b includes a single length of vent fastener material which has a first connection 162 connecting a first end portion 122b of the fastener. vent. The first connection 162 may, for example, connect the first end portion 122b of the vent clip 112b to the rear panel 41b of the airbag 14b or to a portion of the airbag module 30b, such as the housing 34b. The vent clip 112b has a second connection 164 spaced from the first connection 162 and connecting a second end portion 124b of the vent clip. The second connection 164 may, for example, connect the second end portion 124b of the vent clip 112b to the rear panel 41b of the airbag 14b or to a portion of the airbag module 30b, such as the housing 34b.
[0027] As shown in Fig. 12, the vent clip 112b extends from the rear panel 41b of the air bag 14b, passes through the guide clip 113b, and returns to the back panel. The guide clip 113b is formed integrally with the vent 160b and allows the vent clip 112b to slide, or otherwise move, through its structure. The guide clip 113b divides the vent clip 112b into a first segment 166 and a second segment 168.
[0028] In the embodiment illustrated in Fig. 12, the vent clip 112b and the guide 123b are configured so that the first and second segments 166 and 168 extend at an angle of attachment to each other. report to the other. As shown, the segments 166, 168 extend substantially parallel and, therefore, it is easy to recognize that the penetration of the occupant in the airbag 14b, which results in a displacement of the guide clip 113b of X millimeters towards the dashboard 36b, produces a corresponding shortening of the X millimeter vent clamp 112b. Thus, according to the present invention, the vent clip 112b and the guide 123b can be configured to produce a relatively low throttling sensitivity, close to 1: 1 (DT: Dp).
[0029] If the segments 166, 168 were configured to extend at a substantially greater angle α relative to each other, as indicated in ghost lines in FIG. 12, it would be easy to recognize that the penetration of the occupying the airbag 14b, which translates into a displacement of the X millimeter guide clip 113b towards the 36b dashboard, would produce a corresponding shortening of the 2X millimeter vent clip 112b while each segment 166, 168 shortens by .X millimeters. Therefore, according to the present invention, the vent fastener 112b and the guide 123b can be configured to produce a relatively high throttle sensitivity, close to 2: 1 (DT: DP). This high throttling sensitivity allows throttling the vent 160b in a manner that is extremely sensitive and responsive to different penetrations in the airbag. As a result, this allows the vent clip 112b and the guide 123b of the Figure 12 embodiment to differentiate and respond differently to a male occupant at the 50% value and to an occupant. 5% female, although the difference in positioning may be slight. The throttling sensitivity of the vent clip configuration 112b, guide 123b, and vent 160b can be adjusted by changing or adjusting the angle α formed between the clip and the guide 123ba. In the guide configuration 123b of Fig. 12, the sensitivity is raised to a maximum by configuring the attachment segments 166 and 168 so that they extend at large acute angles to one another relative to the other. the other, which results in a throttling sensitivity close to 2: 1 (DT: Dp). To decrease the throttling sensitivity, the combination of vent fastener 112b and vent 160b is adjusted / configured so that the angle α is reduced, for example, the segments 166, 168 are closer to a parallelism. one compared to the other. As the angle a decreases, the throttling sensitivity decreases, and the degree to which the vent fastener 112b throttles the vent 160 for occupant penetration into the given cushion is reduced. Figs. 13A to 13C illustrate apparatus 10b in three states. Similar to FIG. 8A, FIG. 13A illustrates apparatus 10b in a state before occupant 20b engages airbag 14b. In this state, the vent 160b is fully actuated because the airbag 14b reaches its fully expanded state. In addition, in this state, the occupant 20b is spaced from the airbag 14b and must move forwardly to contact and inflate the airbag 14b. This distance can be measured in terms of occupant bust / dash distance, which is indicated at D1 in Fig. 13A. The distance that the occupant 20b must travel before this contact takes place may vary according to the seating position / position of the occupant before deployment of the airbag. In a similar manner to FIG. 8B, FIG. 13B illustrates the apparatus 10b in a state at which the occupant 20b initially contacts the air bag 14b, having moved forward from the position illustrated in FIG. Figure 13A. The bust / dash distance, when this occurs, is indicated at D2 in Fig. 13B. At this point, further penetration of the occupant into the airbag 14b moves the vent clip 112b and the guide 123b to constrict the vent 160b to the non-actuated state. The penetration of the occupant in the airbag 14b and its rebound on the cushion produce a corresponding throat of the vent 160b to the unoperated and actuated states, respectively, of the vent 160b. Similar to FIG. 8C, FIG. 13C illustrates apparatus 10b in a state where occupant 20b has fully penetrated airbag 14b, having moved forward from the position shown in FIG. 13B. The bust / dash distance, when this occurs, is indicated at D3 in Fig. 13C. At this stage, the occupant 20b has entered the air bag 14b to such a degree that the vent clip 112b is loose. In this state, the vent 160b is completely throttled by the penetration of the occupant 20b into the cushion, which puts the vent 160b in the non-actuated state. The vent 160b may be an open vented vent or a closed vented vent. Examples of open and closed actuated vent types 200b, 260b are illustrated and described herein with reference to FIGS. 14A-14C and 15A-15C, respectively. Referring to Figs. 14A-14C, vent 200b is an open vented vent which is similar in vent construction 200 of Figs. 10A-10C. In Figs. 14A-14C, however, the guide clip 113b is formed integrally with the vent 200b. The vent 200b of Figs. 14A-14C operates similarly to the vent 200 of Figs. 10A-10C, the guide 123b applying a tension on the inner wall 202b to actuate the vent 200b to release the inflation fluid from the cushion In Figures 14A to 14C, the guide clip 113b has first and second end portions 127, 129 formed integrally with the closed end portion 224b of the vent 200b to form an opening 125 between the end portions. The vent fastener 112b extends through the opening 125 between the end portions 127, 129 so that the guide 123b and the vent fastener can slide relative to each other by way of the 'opening. In this embodiment, the inflation fluid pressure in the airbag 14 serves to locate / hold the vent 200b in the closed state at the time of deployment. The open actuated vent 200b has an open actuated state illustrated in Fig. 14A, a throttled intermediate state shown in Fig. 14B, and a closed non-actuated state illustrated in Fig. 14C. The states for the vent 200b are identical to the states of the vent 200 of Figs. 10A-10C. Unlike the vent 200, however, the vent clamp 112b and the guide 123b of Figs. 14A-14C are stretched because the vent 200b moves with the airbag 14a away from the dashboard 36b ( see Fig. 12), i.e. away from the connections 162, 164 of the vent clip 112b to the back panel 41b. The degree of tension on the vent clip 112b and the guide 123b corresponds to the position of the occupant 20b and the degree to which the occupant enters the airbag 14b. Therefore, similar to vent 200, vent 200b of FIGS. 14A-14C is throttled by vent attachment 112b and guide 123b moving in direction B in response to occupant penetration. in the airbag 14b.
[0030] The vent 260b of Figs. 15A-15C operates similarly to the vent 260 of Figs. 11A-11C, the vent clamp 112b applying tension to the guide 123b to actuate the vent 260b to prevent release. of inflating fluid of the airbag 14b. In Figs. 15A to 15C, the first and second end portions 127, 129 of the guide clip 113b are integrally formed with the band 274b of the vent 160b. The vent fastener 112b extends through the opening 125 between the end portions 127, 129 so that the guide 123b and the vent fastener can slide relative to each other by way of the 'opening. In this embodiment, the inflation fluid pressure in the airbag 14 serves to locate / hold the vent 260b in the open state at the time of deployment.
[0031] The closed actuated vent 260b has a closed actuated state illustrated in Fig. 15A, an intermediate throttled state illustrated in Fig. 15B, and an open non-actuated state illustrated in Fig. 15C. The states for vent 160a are identical to the states of vent 260 of FIGS. 11A-11C. Unlike vent 260, however, vent attachment 112b and guide 123b of FIGS. 15A-15C are tensioned because vent 260b moves with airbag 14b away from dashboard 36b (FIG. see Fig. 12), i.e. away from the connections 162, 164 of the vent clip 112b to the back panel 41b. The degree of tension on the vent attachment 112b and the guide 123b corresponds to the position of the occupant 20b and the degree to which the occupant enters the airbag 14b. Therefore, similarly to the vent 260, the vent 260b of the figures 15A-15C is throttled by the vent attachment 112b and the guide 123b moving in the direction B in response to the penetration of the occupying the airbag 14b. The arrangement of fasteners, guide and vent described herein illustrate exemplary embodiments. The specific configurations of these embodiments may be modified without departing from the spirit of the present invention. For example, while the fasteners, guide and vent of the present invention are described herein as implemented in a passenger side airbag, it will be apparent to those skilled in the art that the fasteners, guide and the vent could be applied to other inflatable vehicle occupant protection devices, such as driver side frontal airbags, side impact airbags, side curtain airbags, and knee bolsters or airbags for the knees. Similarly, the adaptive fastener could be adapted to produce an airbag expansion or contraction in almost any size in response to an occupant's penetration into the airbag. In addition, while the vents are illustrated to be placed in certain locations on side airbag panels, the vents could be placed at other locations on the side panels or other airbag panels. In addition, although only one vent is illustrated in the embodiments described, the airbags could include multiple vents.
[0032] In view of the above description of the present invention, it will be apparent to those skilled in the art that improvements, variations and modifications are possible. Such improvements, variations and modifications in the field of the art are understood to be covered by the appended claims.

权利要求:
Claims (37)
[0001]
REVENDICATIONS1. An apparatus for helping to protect an occupant (20, 20 ', 20a, 20b) of a vehicle (12, 12a), the apparatus comprising: an inflatable vehicle occupant protection device (14, 14a, 14b) being inflated between a vehicle surface (36) and the occupant (20, 20 ', 20a, 20b) of the vehicle (12), the protection device comprising a panel (74, 74a, 74b) having a portion facing the occupying when the protective device is in an inflated state; a vent (110, 160, 160a, 160b, 200, 200b, 260, 260b) having at least one opening (114, 232, 262, 272) for releasing the inflation fluid from the guard and having an actuated state and a not actuated state; a guide clip (113, 113a, 113b) connected to the vent gate (120, 202, 266); and a vent clip (112, 112a, 112b) connected to the guard and having a guide (123, 123a, 123b) connected to the guide clip (113, 113a, 113b) so that the guide and the guide clip can slide relative to each other, a tension on the vent clip (112, 112a, 112b) applying tension on the guide clip (113, 113a, 113b) to actuate the vent (110, 160, 160a, 160b, 200, 200b, 260, 260b), the vent being configured to be initially in the non-actuated state upon initial deployment of the guard (14, 14a, 14b) , a subsequent deployment of the protection device to a predefined degree causing the vent clip to act on the guide clip to put the vent into the actuated state.
[0002]
Apparatus according to claim 1, wherein the vent (110, 160, 160a, 160b, 200, 200b, 260, 260b) comprises a vent gate (120, 202, 266) for selectively closing the at least one an opening (114, 232, 262, 272), the guide clip (113, 113a, 113b) comprisinga first end attached to the vent at a first location and a second end attached to the vent door at a second location; location, spaced from the first location, so that the second end moves with the vent door relative to the first end during actuation of the vent.
[0003]
The apparatus of claim 1, wherein the vent clip (112a) comprises a first end (122a) connected to the guide clip (113a) and a second end (124a) attached to the shield (14a). ).
[0004]
An apparatus according to claim 1, wherein the guide in the vent clamp comprises an opening (125, 125a) through which the guide clip (113, 113a, 113b) extends to slidably connect the vent clip (112, 112a, 112b) to the guide clip (113, 113a, 113b).
[0005]
An apparatus according to claim 4, wherein the guide clip (113, 113a, 113b) loops in the guide (123, 123a, 123b) so that the movement of the vent clip on a first distance translates into a displacement of the guide clip (113, 113a, 113b) over a second distance greater than the first distance.
[0006]
Apparatus according to claim 1, wherein the vent clip is slidable along the guide clip (113, 113a, 113b) during deployment of the shield (14, 14a, 14b). before the vent clip applies tension to the guide clip.
[0007]
An apparatus according to claim 1, wherein the actuated state of the vent is an open state discharging the inflation fluid from the protection device and the non-actuated state of the vent is a closed state preventing the inflation fluid evacuate from the protective device.
[0008]
8. Apparatus according to. Claim 7, wherein the vent is configured to be placed in an open state in response to the protective device reaching a fully deployed condition, the vent clip acting on the guide clip to constrict the vent to the closed state in response to the penetration of the occupant into the device.
[0009]
An apparatus according to claim 1, wherein the actuated state of the vent is a closed state preventing the inflation fluid from escaping from the protection device and the non-actuated state of the vent is an open state discharging the inflation fluid of the protective device.
[0010]
An apparatus according to claim 9, wherein the vent is configured to be placed in a closed state in response to the protection device reaching a fully deployed state, the vent fastener (112, 112a, 112b) acting on the guide clip (113, 113a, 113b) for throttling the vent to the open state in response to the penetration of the occupant into the device.
[0011]
Apparatus according to claim 1, wherein the vent comprises a vent opening having a flow section that can be adjusted to constrict the flow of inflation fluid through the vent, the tension on the inflator. vent and guide clip throttling the vent.
[0012]
Apparatus according to claim 11, the vent being connected to the guard to move with the guard in response to the penetration of the occupant into the guard, and this vent movement causing the fastener vent to act on the guide clip and thus to constrict the vent.
[0013]
Apparatus according to claim 11, wherein the degree of penetration of the occupant into the guard relative to the vent throat can be adjusted by adjusting at least the position of the vent or the position of the vent. the connection of the vent clip to the protection device. 35
[0014]
An apparatus according to claim 11, wherein the degree of penetration of the occupant into the guard relative to the vent throat can be adjusted by adjusting an angle (a) between portions of the guiding fastener. extending through the guide into the vent clip.
[0015]
Apparatus according to claim 11, wherein the vent is configured such that the inflation fluid pressure in the protection device urges the vent to the non-actuated state and the vent clamp acts on the guiding fastener for bringing the vent to the actuated state against the biasing of the inflation fluid pressure as the guard inflates and expands.
[0016]
Apparatus according to claim 11, wherein the vent fastener is configured so that movement of the vent fastener, in response to the penetration of the occupant into the device, acts on the pulley. guiding to cause the vent constriction by allowing the vent to move under the bias of the inflation fluid pressure to the non-actuated state.
[0017]
Apparatus according to claim 11, wherein the constriction of the vent is proportional to the penetration of the occupant into the protection device.
[0018]
Apparatus according to claim 1, wherein the vent clip and the guide clip are configured to prevent operation of the vent in response to the blocked deployment of the guard.
[0019]
Apparatus according to claim 1, wherein the guide clip holds the vent fastener of the vent door.
[0020]
Apparatus for helping to protect an occupant (20, 20 ', 20a, 20b) of a vehicle (12, 12a), the apparatus comprising: an inflatable occupant (14, 14a, 14b) vehicle inflatable between a vehicle surface (36) and the occupant (20, 20 ', 20a, 20b) of the vehicle (12), the protection device comprising a panel having a portion presented towards the occupant when the protective device is in an inflated state; a vent (110, 160, 160a, 160b, 200, 200b, 260, 260b) having at least one opening (114, 232, 262, 272) for releasing the inflation fluid from the guard and having an actuated state and a not actuated state; a guide (123, 123a, 123b) placed on the vent door; and a vent clip (112, 112a, 112b) connected to the shield and extending into the guide so that the vent clip and the guide can slide relative to each other, a voltage on the vent fastener applying a voltage on the guide to actuate the vent, the vent being configured to be initially in the non-actuated state upon the initial deployment of the protection device, a subsequent deployment of the protection to a predefined degree causing the vent clip to act on the guide to bring the vent into the actuated state.
[0021]
Apparatus according to claim 20, wherein the vent (110, 160, 160a, 160b, 200, 200b, 260, 260b) comprises a vent gate (120, 202, 266) for selectively closing the minus one opening (114, 232, 262, 272), the vent clip (112, 112a, 112b) including a first end portion (166) attached to a first location on a back panel (41b) of the device protection panel opposite the panel and a second end portion (168) attached to a second location on the back panel (41b) so that the first and second end portions extend at an angle ( a) relative to each other, adjusting the angle between the first and second end portions to vary the throttling sensitivity of the vent.
[0022]
Apparatus according to claim 20, wherein the guide is formed integrally with the vent door.
[0023]
Apparatus according to claim 20, wherein the guide comprises an opening (125, 125a) through which the vent clip (112, 112a, 112b) extends to slidably connect the vent clip to guide.
[0024]
Apparatus according to claim 20, wherein the vent clip (112, 112a, 112b) loops into the guide (123, 123a, 123b) so that the movement of the vent clip on a first distance results in a displacement of the guide on a second distance less than the first distance.
[0025]
Apparatus according to claim 20, wherein the vent clip is slidable along the guide clip during the deployment of the guard (14, 14a, 14b) before the fastener vent applies tension to the guide clip.
[0026]
Apparatus according to claim 20, wherein the actuated state of the vent is an open state discharging the inflation fluid from the protection device and the non-actuated state of the vent is a closed state preventing the fluid from inflation to evacuate the protective device.
[0027]
Apparatus according to claim 26, wherein the vent is configured to be placed in an open state in response to the protection device reaching a fully expanded state, the vent clamp acting on the guide to constrict the vent. to the closed state in response to the penetration of the occupant into the device. 30
[0028]
Apparatus according to claim 20, wherein the actuated state of the vent is a closed state preventing the inflation fluid from escaping from the protection device and the non-actuated state of the vent is an open state evacuating the inflation fluid of the protective device. 35
[0029]
Apparatus according to claim 28, wherein the vent is configured to be in a closed state in response to the protection device reaching a fully expanded state, the vent fastener acting on the guide to constrict the vent to the open state in response to the penetration of the occupant into the device.
[0030]
The apparatus of claim 20, wherein the vent comprises a vent opening having a flow section that can be adjusted to constrict the flow of inflation fluid through the vent, a tension on the airbag attachment. vent and the guide throttling the vent.
[0031]
Apparatus according to claim 30, the vent being connected to the guard to move with the guard in response to the penetration of the occupant into the guard, and this vent movement causing the fastener vent to act on the guide and thus to strangle the vent.
[0032]
Apparatus according to claim 30, wherein the degree of penetration of the occupant into the guard relative to the vent throat can be adjusted by adjusting at least the position of the vent or the position of the vent. connection of the vent clip to the protection device.
[0033]
Apparatus according to claim 30, wherein the degree of penetration of the occupant into the guard relative to the vent throat can be adjusted by adjusting an angle (a) between parts of the air vent. vent extending through the guide on the vent door.
[0034]
Apparatus according to claim 30, wherein the vent is configured such that the inflation fluid pressure in the protection device urges the vent to the non-actuated state and the vent clip acts on the guide. to bring the vent to the actuated state against the biasing of the inflation fluid pressure while the protection device inflates and expands.
[0035]
Apparatus according to claim 30, wherein the vent clip is configured such that movement of the vent clip, in response to the penetration of the occupant into the device, acts on the guide to cause the vent constriction by allowing the vent to move under the bias of the inflation fluid pressure to the non-actuated state.
[0036]
Apparatus according to claim 30, wherein the constriction of the vent is proportional to the penetration of the occupant into the protection device.
[0037]
An apparatus according to claim 20, wherein the vent clip and the guide are configured to prevent operation of the vent in response to the blocked deployment of the guard.

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同族专利:

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公开号 | 公开日

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FR3019510B1|2019-09-13|

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DE102015004190A1|2015-10-08|

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CN105109446A|2015-12-02|

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US20150283971A1|2015-10-08|

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CN105109446B|2019-11-15|

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US9327674B2|2016-05-03|

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法律状态:
2016-03-28| PLFP| Fee payment|Year of fee payment: 2 |

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2017-03-27| PLFP| Fee payment|Year of fee payment: 3 |

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2018-03-26| PLFP| Fee payment|Year of fee payment: 4 |

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2019-02-15| PLSC| Search report ready|Effective date: 20190215 |

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2019-03-25| PLFP| Fee payment|Year of fee payment: 5 |

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2020-03-25| PLFP| Fee payment|Year of fee payment: 6 |

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2021-03-25| PLFP| Fee payment|Year of fee payment: 7 |

优先权:

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申请号 | 申请日 | 专利标题

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US14/243,016|US9327674B2|2014-04-02|2014-04-02|Passive air bag vent with guide|

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US14243016|2014-04-02|

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