• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    direct double-column injector for automotive gasoline solenoids. the present invention relates to a direct fuel injector (10) which includes a body (12) that has a passage between inlet and outlet ends. a seat (16) is at the outlet end and a closing member (28) is associated with the seat. a needle member (30) is associated with the closing member and is movable with respect to a column piece (35) between a first closed position and a second open position. a spring (42) guides the needle member to the first position. an armature (32) is floating free with respect to the needle member. an intermediate column structure (38) is coupled to the needle member and is disposed between the column piece and the reinforcement and is uncoupled from there. an armature stop (40) is coupled to the needle member and is spaced from the intermediate column structure. an electromagnetic coil (46) is associated with the column part, the intermediate column structure and the armature. the injector reduces the violent hit of the needle set.
    公开号:BR112012029008B1
    申请号:R112012029008-8
    申请日:2011-05-13
    公开日:2020-12-15
    发明作者:Michael J. Hornby
    申请人:Continental Automotive Gmbh；
    IPC主号:
    专利说明:

    FIELD
    [001] The present invention relates to a fuel injector for supplying gasoline to an engine and, more particularly, to a fuel injector having an intermediate column for increasing the speed and force generated in the injector solenoid while adding an anti-knock mechanism in the injector. BACKGROUND
    [002] Conventional direct injection solenoid fuel injectors have anti-knock mechanisms to limit the knock of the armature and thus an inadvertent opening of the injector. However, these conventional mechanisms make the injector close generally slow, or the magnetic force generated is not high enough for new higher pressure applications. Another disadvantage of prior art is the configuration of components for manufacturing. These conventional direct injectors are not configured in a modular way and therefore cannot be built and tested in modular stages. This results in scrap during manufacture and thus increases the cost.
    [003] Thus, there is a need to provide a direct solenoid fuel injector, antibacterial, modular, which provides an increased opening speed and can be calibrated and tested on a subset basis. SUMMARY
    [004] An objective of the present invention is to meet the need mentioned above. According to the principles of a modality, this objective is achieved by a direct fuel injector for an internal combustion engine including a body that has a passage that extends along a longitudinal geometric axis between inlet and outlet ends. A seat is at the outlet end and a closing member is associated with the seat. A needle member is associated with the closing member and is movable with respect to a column piece between a first position and a second position, so that, in the first position, the needle member engages the closing member, so that the closing member engages the seat for closing the outlet end, and, in the second position, the needle member is in a position that allows the closing member to disengage from the seat, opening the outlet end. A spring guides the needle member to the first position. An armature is constructed and arranged to be free floating with respect to the needle member. An intermediate column structure is coupled to the needle member and disposed between the column piece and the armature and decoupled from the armature and column piece. An armature stop is attached to the needle member and spaced from the intermediate column structure. An electromagnetic coil is associated with the column part, the intermediate column structure and the armature. The coil, when energized, is constructed and arranged to provide a magnetic flux that accelerates the armature to impact the intermediate column structure with the intermediate column structure impacting the column piece by moving the needle member to the second position, with the armature hitting with respect to the intermediate column structure, instead of the needle assembly hitting with respect to the seat. When the bobbin is de-energized, removing the magnetic flux, the intermediate column structure and the armature are constructed and arranged to move away from the column piece with the spring guiding the needle member to the first position, with the armature fitting into the armor stop causing the armor to hit with respect to the armor stop, instead of the needle member hitting with respect to the seat.
    [005] According to another aspect of a modality, a method is provided for controlling the stroke in a direct fuel injector that has a seat at one end of the injector, a closing member associated with the seat, a column piece, an electromagnetic coil and a movable needle member with respect to the column piece between a first position and a second position, so that, in the first position, the needle member engages the closing member, so that the closing member engages the seat for closing the outlet end, and, in the second position, the needle member is in a position that allows the closing member to disengage from the seat, opening the outlet end. The method provides an armature that is free floating with respect to the needle member and an intermediate column structure coupled to the needle member and disposed between the column piece and the armature and decoupled from the armature and column piece. When the coil is energized and the magnetic flux accelerates the armature to impact the intermediate column structure, with the intermediate column structure impacting the column piece by moving the needle member to the second position, the method ensures that the armature hits with respect to the intermediate column structure, rather than the needle member hitting with respect to the seat. When the bobbin is de-energized to remove the magnetic flux, causing the intermediate column structure and armature to move away from the column piece and causing the needle member to move to the first position, the method ensures that the armor has an impact and knock off a needle limb armor stop hitting with respect to the seat.
    [006] Other objectives, resources and characteristics of the present invention, as well as the methods of operation and the functions of the related elements of the structure, the combination of parts and manufacturing economy will become more evident upon a consideration of the detailed description a below and associated drawings, all of which form a part of this specification. BRIEF DESCRIPTION OF THE DRAWINGS
    [007] The invention will be better understood from the detailed description below of the preferred modalities thereof, taken in conjunction with the associated drawings, in which equal reference numbers refer to equal parts, in which:
    [008] Figure 1 is a perspective view, partially in section, of a direct fuel injector with double solenoid column, according to an embodiment of the invention.
    [009] Figure 2 is an enlarged view of the fuel injector portion circled in figure 1.
    [0010] Figure 3 is an enlarged sectional view of a portion of the direct fuel injector of figure 2, showing an intermediate column and a corrugated spring associated with the armature. DETAILED DESCRIPTION OF THE EXAMPLE MODE
    [0011] With reference to figures 1 and 2, a direct fuel injector, double column, actuated by solenoid, generally indicated in 10, which can be of the type of power so called top, supplies fuel, such as gasoline, for an internal combustion engine (not shown). The fuel injector 10 includes a valve body, generally indicated at 12, extending along a longitudinal geometric axis 14. The valve body 12 includes a valve seat 16 that defines a seating surface 18, which can have a tapered or concave shape, facing the interior of the valve body 12. The seating surface 18 includes at least one fuel outlet opening 20, preferably centered on the longitudinal geometric axis 14 and in communication with an inlet pipe 22 for the conduction of pressurized fluid to the valve body 12 against the seating surface 18. A proximal portion of the inlet tube 22 defines an inlet end 24 of the injector 10. An O-ring 26 (figure 1) is used to seal the inlet end 24 on a fuel rail nom.
    [0012] A closing member, for example, a ball valve ball 28, inside the injector 10, is movable between a first seated or closed position and a second open position. In the closed position, the valve ball 28 is forced against the seating surface 18 to close the outlet opening 20 to prevent a flow of fuel. In the open position, the ball 28 is spaced from the seating surface 18 to allow a flow of fuel through the outlet opening 20.
    [0013] A needle member 30, preferably in the form of a tube, is disposed in the inlet tube 22 on the geometry axis 14. A generally cylindrical armature 32 is movable along the geometry axis 14 in a tube portion 34 of the body of valve 12. Armature 32 is free floating and thus is not connected to needle member 30. Armature 32 includes a generally flat end surface 33. A column piece 35 is associated with armature 32 in the conventional manner. In a first position, an end 36 of the needle member 30 engages with the valve ball 28, so that the valve ball 28 engages the seating surface 18 in the closed position of the valve ball 28. The valid ball -valve 28 can be considered to be part of the needle member 30. An intermediate column structure 38 and an armor stop 40 are welded to the needle member 30 for movement with it. The armature stop 40 is spaced from the intermediate column structure 38. The intermediate column structure 38 includes a small diameter portion 43 that is welded to the needle member 30 and a larger diameter portion 45 that extends from the portion 43. The larger diameter portion 45 has opposite flat surfaces 47, 49 defining impact surfaces, the function of which will be explained below. An annular corrugated spring 41 is provided between the armature 32 and the intermediate column structure 38 (for example, the surface 47 of it) for decoupling the armature 32 from the intermediate column structure 38. As best shown in figure 3, the member needle passes through the intermediate column structure 38, the corrugated spring 41, the armature 32 and the armature stop 40.
    [0014] A spring 42 fits into the intermediate column structure 38 and thus guides the needle member 30 and the valve ball 28 towards the closed position. The fuel injector 10 can be calibrated by the preload spring 42 for a desired guiding force. A filter 44 is provided in the tube 24 for filtering the fuel.
    [0015] As best shown in figure 3, an electromagnetic coil 46 surrounds a column piece or stator 35 formed in a ferromagnetic material. The electromagnetic coil 46 is operated by DC and driven through an electrical connector 48. The electromagnetic coil 46 is operable to produce a magnetic flux, when energized, so that a magnetic field is constructed between the armature 32, the structure of intermediate column 38 and column piece 35. This creates a magnetic force in the armature 32 that accelerates the armature 32 to impact the intermediate column structure 38. In particular, the flat surface 33 of the armature 32 fits into the flat surface 47 of the structure intermediate column 38. The impact force is greater than just the magnetic force due to the acceleration of the armature 32. Advantageously, this greater force creates an injector 10 that can operate at higher pressures. After the armature 32 impacts the intermediate column structure 38, the injector 10 is commanded to open. A full opening is obtained when the flat surface 49 of the larger diameter portion 45 of the intermediate column structure 38 impacts the flat end 50 of the column piece 35. This causes the end 36 of the needle member 30 to move to the second position, away from the seating surface 18, allowing the valve ball 28 to disengage from the seating surface 18. In conventional direct injectors, this impact would cause an unwanted hit of the needle member 30 with respect to the seating surface 18. However, in the embodiment, the needle member 30 does not strike, since the armature 32 is allowed to strike outside the intermediate column structure 38. The mass of the armature 32 is decoupled from that of the needle member / of the intermediate column structure.
    [0016] At the closing of the injector 10, the coil 46 is de-energized, removing the magnetic field and allowing the intermediate column structure 38 and the armature 32 to move away from the column piece 35. The spring 42 guides the column structure intermediate 38 and thus the needle member 30 towards the first position thereof, and an impact occurs between the end 36 of the needle member 30 and the valve ball 28. In conventional direct injectors, the needle member would hit out the valve ball 28, causing the valve ball 28 to disengage from the seating surface 18, allowing for an undesirable secondary injection. In the embodiment, advantageously, the course of the armature 32 with respect to the needle member 30 is limited, by fitting the armature 32 with the armature stop 40, reducing the amount of energy that can cause a secondary strike of the needle member 30. In addition, the tapping of the armature 32 against the armature stop 40 removes energy, so that any tapping of the needle member 30 with respect to seat 18 is prevented or limited. As mentioned above, the corrugated spring 41 decouples the intermediate column structure 38 (and thus the needle member 30) from the armature 32.
    [0017] Thus, the provision of the intermediate column structure 38 associated with the reinforcement 32 increases the opening speed of the injector 10, due to the impact of the reinforcement 32 and the intermediate column structure 38. Since there is a large impact area between the armature 32, the intermediate column structure 38 and the column piece 35, the wear and durability of the injector are improved. Coil 46, spring 42, needle member 30, armature 32, column piece 35, intermediate column structure 38 and armature stop 40 define a modular subset of the injector 10, allowing the injector to be calibrated or tested on a subset basis.
    [0018] Thus, injector 10 has a more powerful opening force, compared to conventional injectors, has a stronger closing spring for better leakage capacity, and eliminates the knock on opening and closing. Flow performance is improved due to faster opening and closing and the elimination of a secondary injection by reducing or eliminating the tapping of the needle member 30.
    [0019] The foregoing preferred modalities have been shown and described for the purpose of illustrating the structural and functional principles of the present invention, as well as illustrating the methods of employing the preferred modalities and are subject to change without departing from these principles.
    权利要求:
    Claims (12)
    [0001]
    1. Direct fuel injector (10) for an internal combustion engine, comprising a body (12) that has a passage that extends along a longitudinal geometric axis (14) between inlet ends (24) and output; a seat (16) at the outlet end; a closing member associated with the headquarters (16); a column piece (35); a needle member (30) associated with the closing and movable member with respect to the column piece (35) between a first position and a second position, so that, in the first position, the needle member (30) fits into the closing member, so that the closing member fits into the seat (16) for closing the outlet end, and, in the second position, the needle member (30) is in a position that allows the closing member to detaching the seat (16), opening the open end; a spring (42) orienting the needle member (30) to the first position; an armature (32); an intermediate column structure (38) coupled to the needle member (30) and disposed between the column piece (35) and the armature (32) and decoupled from both the armature and the column piece (35); an armature stop (40) coupled to the needle member (30) and spaced from the intermediate column structure (38); and an electromagnetic coil (46) associated with the column piece (35), the intermediate column structure (38) and the armature (32), characterized by the fact that the armature (32) is constructed and arranged to be free floating with respect to the needle member (30); the intermediate column structure (38) is decoupled from the armature (32), the fuel injector (1) comprises another spring between the intermediate column structure (38) and the armature (32) to decouple the intermediate column structure ( 38) of the armature (32); the coil (46), when energized, being built and arranged to provide a magnetic flux that accelerates the armature (32) to have an impact of the intermediate column structure (38) with the intermediate column structure (38) impacting the part column (35) moving the needle member (30) to the second position, with the armature (32) tapping with respect to the intermediate column structure (38) instead of the needle set tapping with respect to the seat (16), and, when the coil (46) is de-energized, removing the magnetic flux, the intermediate column structure (38) and the armature (32) are constructed and arranged to move away from the column piece (35) with the spring ( 42) orienting the needle member (30) to the first position, with the armature (32) engaging the armature stop (40) causing the armature (32) to strike with respect to the armature stop (40) instead the needle member (30) strikes with respect to the seat (16).
    [0002]
    2. Fuel injector according to claim 1, characterized in that the intermediate column structure (38) includes a small diameter portion (43) and a larger diameter portion (45) extending from there larger diameter portion (45) having opposite flat surfaces (47, 49) defining the first and second impact surfaces of the intermediate column structure (38).
    [0003]
    Fuel injector according to claim 2, characterized in that the armature (32) is generally cylindrical having a flat end surface (33) constructed and arranged to fit the first impact surface of the column structure intermediate (38).
    [0004]
    4. Fuel injector according to claim 3, characterized by the fact that the column piece (35) has a flat end (50) constructed and arranged to fit the second impact surface of the intermediate column structure (38 ).
    [0005]
    5. Fuel injector according to claim 1, characterized by the fact that the other spring is a corrugated spring (41).
    [0006]
    6. Fuel injector according to claim 1, characterized by the fact that the closing member is a valve ball (28).
    [0007]
    7. Fuel injector, according to claim 1, characterized by the fact that the spring (42) fits into the intermediate column structure (38).
    [0008]
    8. Fuel injector according to claim 1, characterized by the fact that the column piece (35), the needle member (30), the spring (42), the armature (32), the column structure intermediate (38), the armature stop (40) and the coil (46) define a modular subset of the injector (10) that is constructed and arranged to be tested on a subset basis.
    [0009]
    9. Fuel injector according to claim 1, characterized by the fact that the needle member (30) has a tube shape.
    [0010]
    10. Beat control method on a direct fuel injector (10) having a seat (16) at an injector outlet end (10), a closing member associated with the seat (16), a column piece (35 ), an electromagnetic coil (46) and a movable needle member (30) with respect to the column piece (35) between a first position and a second position, so that, in the first position, the needle member (30) engages the closing member, so that the closing member engages the seat (16) to close the outlet end, and, in the second position, the needle member (30) is in a position allowing the closing detaches from the seat (16), opening the outlet end, the method characterized by the fact that it comprises the steps of, providing an armature (32) to be free floating with respect to the needle member (30), provision an intermediate column structure (38) coupled to the needle member (30) and arranged between the column piece a (35) and the armature (32) and decoupled from the armature (32) and the column piece (35); providing a spring (42) to direct the needle member (30) to a first position; providing another spring between the intermediate column structure (38) and the armature (32) to decouple the intermediate column structure (38) from the armature (32); when the coil (46) is energized and the magnetic flux accelerates the armature (32) to impact the intermediate column structure (38), with the intermediate column structure (38) impacting the column piece (35) by moving the limb needle (30) to the second position, ensuring that the armature (32) hits with respect to the intermediate column structure (38), instead of the needle member (30) hitting with respect to the seat (16), and when the bobbin (46) is de-energized to remove the magnetic flux, causing the intermediate column structure (38) and armature (32) to move away from the column piece (35) and causing the needle member (30 ) moves to the first position, ensuring that the armature (32) has an impact and strikes out of an armature stop (40) of the needle member (30) with respect to the seat (16).
    [0011]
    11. Method according to claim 10, characterized in that the armature stop (40) is coupled to the needle member (30) and is spaced from the intermediate column structure (38).
    [0012]
    12. Method according to claim 10, characterized by the fact that the other spring is a corrugated spring (41).
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    法律状态:
    2018-05-08| B25A| Requested transfer of rights approved|Owner name: CONTINENTAL AUTOMOTIVE SYSTEMS, INC. (US) |
    2018-05-22| B25A| Requested transfer of rights approved|Owner name: CONTINENTAL AUTOMOTIVE GMBH (DE) |
    2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-09-10| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-07-21| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2020-10-06| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-12-15| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 13/05/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US12/779,984|US8215573B2|2010-05-14|2010-05-14|Automotive gasoline solenoid double pole direct injector|
    US12/779,984|2010-05-14|
    PCT/US2011/036428|WO2011143552A2|2010-05-14|2011-05-13|Automotive gasoline solenoid double pole direct injector|
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