巴西专利BR112013013079A2 PRESSURE ACTION VALVE FOR EXHAUST SYSTEM

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专利摘要:
"pressure action valve for exhaust system". the present invention relates to a muffler for an internal combustion engine exhaust system includes a housing having inlet and outlet heads enclosing opposite ends of an external wrap. a partition divides an interior of the housing into first and second chambers, the first chamber having sound absorbing material positioned within it. the partition has an opening that allows fluid communication between the first and second chambers. a hollow tube extends through the inlet and outlet heads and the partition and has a plurality of perforations allowing fluid communication between the hollow tube and the first chamber. a valve assembly has a valve flap positioned within the hollow tube to rotate with an axis articulated to the tube between a closed position and an open position. the valve is positioned downstream of the pipe perforations so that all the exhaust gas flowing through the muffler passes through the valve regardless of the position of the valve flap.
公开号:BR112013013079A2
申请号:R112013013079-2
申请日:2011-11-28
公开日:2021-04-13
发明作者:William E. Hill；Howard C. Macaluso；Steven Clayton
申请人:Tenneco Automotive Operating Company Inc；
IPC主号:

专利说明:

Invention Patent Descriptive Report for "PRESSURE ACTION VALVE FOR EXHAUST SYSTEM". The present invention relates to valve arrangements for vehicle exhaust systems.
More specifically, the present teachings belong to valves with passive flaps for exhaust ducts.
Many exhaust systems have attempted to use both active and passive valve assemblies to alter the characteristics of the exhaust flow through a duct as the exhaust pressure increases due to the increasing speed of the engine.
Active valves carry the increased cost of requiring a specific actuating element, such as a solenoid.
Passive valves use the pressure of the exhaust current in the duct with which the valve is associated.
Traditionally, even passive valves alone give rise to problems of unwanted back pressure when the valve is opened.
There seems to be a need in the art to create a passive valve arrangement that can be used entirely within a conduit, which is relatively inexpensive, and is able to assume a fully open position that minimizes unwanted back pressure. 20 Summary Accordingly, a set of valve actuated by exhaustion pressure for placement within a tubular exhaust duct includes a valve flap having first and second arched edges substantially conforming to the curved parts of the exhaust duct, and first and second linear edges extending between the first and second arched edges and providing a space between the valve flap and an internal duct surface.
An axis adapted to artificially couple the valve flap to the exhaust flue around a longitudinal axis axis is coupled to the valve flap between the first and second arched edges so that uneven surface areas of the valve flap are on each side of the shaft.
The shaft additionally includes a protrusion at one end of it adapted to be positioned outside the exhaust duct.
A guiding element is adapted to be coupled between the exhaust duct and the protrusion and operates to orient the valve flap in the direction of a closed position where the first and second arched edges of the valve flap come into contact with the curved parts of the exhaust duct.
The exhaustion pressure can be of a magnitude that exceeds a guiding force of the guiding element to force the valve flap to a fully open position within the conduit where the first and second linear edges of the valve flap they come into contact with an internal surface of the valve line 10 and are substantially parallel to the longitudinal axis of the line.
In an additional aspect of the teachings described, a silencer for an internal combustion engine exhaust system includes a housing having an outer casing, inlet and outlet heads, 15 opposite ends of the casing closure and a partition inside the housing dividing the same in first and second chambers.
The partition has at least one opening through it providing fluid communication between the first and second chambers.
A hollow tube extends through the inlet and outlet heads and the partition and has a first plurality of perforations allowing the communication of fluid between the hollow tube and the first chamber and a second plurality of perforations allowing communication by fluid between the hollow tube and the second chamber.
A valve assembly having a valve flap is positioned within the hollow tube between the first and second plurality of 25 hollow tube perforations.
The valve flap rotates about an axis articulated to the tube between a fully closed position where a first peripheral part of the valve flap is in contact with an internal surface of the hollow tube and a fully open position where a plane of the valve flap is substantially parallel to a longitudinal geometric axis 30 of the hollow tube and a second peripheral part of the valve flap is in contact with an internal surface of the hollow tube.
In an additional aspect of the teachings described, a con-
next to a valve driven by fluid flow pressure for placement within a tubular conduit, it includes a valve flap having a first peripheral part adapted to be in contact with an internal surface of the conduit when the flap is in a fully closed position and a second peripheral part in contact with the inner surface of the conduit in a fully open position.
An axis is adapted to articulate the valve flap to the duct around a longitudinal axis geometric axis, the axis coupled to the valve flap asymmetrically with respect to a surface area of the valve flap, the shaft including a protuberance adapted to be positioned outside the conduit.
A guiding element is adapted to be coupled between the conduit and the protrusion and operates to push the valve flap in the direction of the fully closed position.
A muffler for an internal combustion engine exhaust system includes a housing having an inlet and outlet head enclosing the opposite ends of an external wrap.
A partition divides an interior of the housing into first and second chambers, the first chamber having sound absorbing material positioned within it.
The partition has an opening that allows communication by fluid between the first and second chambers.
A hollow tube extends through the inlet and outlet heads and the partition and has a plurality of perforations allowing fluid communication between the hollow tube and the first chamber.
A valve assembly has a valve flap positioned within the hollow tube for rotation with an articulated shaft 25 coupled to the tube between a closed position and an open position.
The valve is positioned downstream of the pipe perforations so that all the exhaust gas flowing through the muffler passes through the valve regardless of the position of the valve flap.
A muffler for an internal combustion engine exhaust system includes a housing having an external casing, and inlet and outlet heads enclosing opposite ends of the casing.
A partition divides a housing interior into a first chamber extending from the input head to the partition and a second chamber extending from the partition to the exit head.
A hollow tube extends through the inlet and outlet heads and the partition and has a plurality of perforations allowing communication by 5 fluid between the hollow tube and the first chamber.
The part of the tube extending through the second chamber is devoid of perforations.
A valve assembly has a substantially flat valve flap positioned within the hollow tube with an axle coupled to the tube.
The valve flap is rotatable between a closed position and an open position 10 where a plane of the valve flap is substantially parallel to a longitudinal geometric axis of the hollow tube.
The valve is positioned inside the second chamber downstream of the tube perforations to separate the first and second chambers of the tube downstream from the valve when the valve is closed. 15 A muffler for an internal combustion engine exhaust system includes a housing with an external casing, inlet and outlet heads enclosing opposite ends of the casing.
An inlet tube extends through the inlet head.
A first outlet tube extends through the outlet head.
A second outlet tube 20 extends through one of the inlet and outlet heads.
The first and second valve assemblies each include a flat valve flap positioned inside the first and second outlet tubes, respectively, for rotation with a geometrical axis articulated to the respective outlet tube.
The valve flap is rotatable between a closed position and an open position where a plane of the valve flap is substantially parallel to a longitudinal geometric axis of the outlet pipe where the valve is positioned.
The first and second valves are positioned so that all the exhaust gas flowing through the muffler passes through the valves. 30 A muffler for an internal combustion engine exhaust system includes a housing with an external casing, and inlet and outlet heads enclosing opposite ends of the casing.
An inlet tube extends through the inlet head and has a plurality of perforations allowing fluid communication between the inlet tube and an interior of the housing.
A partition inside the accommodation divides the interior of the accommodation into first and second chambers.
The first chamber includes sound-absorbing material positioned therein.
The partition has at least one opening through it to provide fluid communication between the first and second chambers.
First and second outlet tubes extend through the outlet head where each outlet tube includes an upstream end 10 coupled in fluid communication with an end downstream of the inlet tube.
A valve assembly has a substantially flat valve flap positioned inside the inlet pipe for rotation with an axle pivotally coupled to the inlet pipe.
The valve flap is rotatable between a closed position and an open position where the valve flap is substantially parallel to a longitudinal axis of the inlet tube.
Brief Description of the Drawings The objectives and characteristics of the teachings described will become apparent from a reading of the detailed description, taken into consideration in conjunction with the drawings, in which: Figures 1A and 1B are side and end views respectively a valve controlling the flow of fluid through a conduit, the valve being in a closed position and arranged according to the teachings described; Figures 2A and 2B are side and end views of the valve of Figures 1A, 1B in an open position of 15; Figures 3A and 3B are respectively side and end views of the valve of figures 1A, 1B in an open position of 30; Figures 4A and 4B are side and end views of the valve in Figures 1A, and 1B in a fully open position; Figures 5A and 5B are side and end views of a first valve shaft arrangement in accordance with the present teachings;
Figures 6A and 6B are side and end views of a second valve shaft arrangement in accordance with the present teachings; Figure 7 is an end view of the valve of figures 1A 5 and 1B with the tube in contact with the altered valve flap to achieve substantially complete blockage of the tube when the valve is placed in the fully closed position; Figure 8 is a cross-sectional view of an exhaust muffler arranged with the valve of Figures 1A and 1B according to the present teachings; Figure 9 is a cross-sectional view of another exhaust muffler arranged with the valve of Figures 1A, 1B according to the present teachings; Figure 10 is a plan view of a partition within the silencer of Figure 9; Figure 11 is an end view of the muffler shown in Figure 9; Figure 12 is a cross-sectional view of an exhaust muffler having a single inlet, double outlets and a valve constructed in accordance with the teachings of the present description; Figure 13 is a cross-sectional view of another single inlet and double outlet exhaust muffler; Figure 14 is a cross-sectional view of another exhaust muffler with single inlet and double outlet; 25 Figure 15 is a cross-sectional view of another exhaust inlet with a combined inlet and double outlet; Figure 16 is a cross-sectional view of another single inlet and double outlet exhaust muffler.
Detailed Description 30 Referring to figures 1A to 4B, the side and end views of a valve assembly with a valve flap in various operating positions are illustrated in side and end views of the con-
pipeline in which the valve assembly is positioned.
Identical elements between these figures carry the same last two designation numerals.
An exhaust duct 102 contains a pressure action valve 100 that includes a spring anchor 104, a valve spring 106, and an external lever arm 108, a valve flap 110, a valve support shaft. 112 and a spring clamping arm 114 projecting from axis 112. Valve flap 110 has first and second arched edges substantially conforming to an internal arched surface of flue 102. Flap 110 additionally has linear side edges 116 and 118 that provide space 120, 122 between the flap 110 and an inner surface of the conduit 102 when the flap is in the closed position illustrated in figures 1A and 1B.
The guide element or spring 106 extends between an anchoring point 104 in the conduit 102 and the attachment point 114 of the outer lever arm 108. The spring 106 guides the tab 110 in the direction of the closed position shown in Figure 1A.
When in the fully closed position, the flap 110 resides at an angle beyond 90 to a plane extending normally to the longitudinal geometric axis of the conduit 102. The angle of the flap with respect to a normal transverse plane of the conduit 102 is designated 20 A .
In operation, the exhaust pressure falls on tab 110 from the left as shown in figures 1A to 4B.
When the exhaust pressure is sufficient to overcome the orientation force of the spring 106, the flap 110 will begin to rotate around the axis 112. The torque in the valve flap 110 25 is determined by the orientation spring force multiplied by the distance d that is the distance d between the spring's geometric axis and the 112 axis. The spring force increases as the valve flap opens and the spring 106 stretches.
However, it becomes shorter as the valve continues to open resulting in the torque approaching zero as the longitudinal spring axis 30 approaches an “over center” position, that is, as approaching the intersection with a longitudinal geometric axis of axis 112. This positioning almost on the center of the validity flap
valve as illustrated in 410 in figure 4A and figure 4B results in a substantially horizontal position of the flap when in the fully open position.
This positioning, in turn, minimizes the back pressure in the pipeline when the valve is in the fully open position.
Additionally, it should be noted that the duct itself supplies the stop mechanism for the valve flap in its fully closed and fully open position.
In the fully closed position, the arched edges of the flap 114 come into contact with the inner surface of the flue 102 to define this position.
Conversely, when in the fully open position, as illustrated in the 10 figures 4A and 4B, the flap 410 uses its lateral linear edges (116 and 118 of figure 1B) to contact the linear surface of the conduit 402 to thereby supply a stop position for the fully open position of the flap 410. Rotating the valve flap so that the spring approaches the condition on the center also results in easier maintenance of the valves in the fully open position.
Figures 5A and 5B illustrate a first shaft arrangement suitable for use with the valve assembly described here.
The valve flap 510 rotates inside the conduit 502 about the axis 512 which is located asymmetrically with respect to the plane of the flap 510. An orientation spring 506 extends between the anchor point 504 and a fixation point 514 in the lever arm 508. As seen from figure 5B, the shaft 512, which is articulated to the conduit 502 through suitable openings, extends only to its leftmost end as illustrated in figure 5B in order to provide a space between axis 512 and spring 506. With this space, the spring arrives almost at the center position and maintains that position until the exhaust flow pressure is significantly reduced.
At this point, the valve flap snaps into the closed position.
Lever arm 508 projects from shaft 512 as a separate clamping element or integral protrusion of shaft 512. Figures 6A and 6B show an alternate shaft arrangement for use with the described valve assembly.
In this arrangement, the axis
612 extends out of the conduit a sufficient distance at which it intersects the final location of spring 606 when in its fully extended position. Thus, in this arrangement, the spring 606 will come in contact with the axis 612 and wrap around it when the fully open position is reached. With this arrangement, since the spring 606 wraps around the axis 612, the spring will pull the flap 610 to the closed position as soon as the exhaust flow pressure is reduced to a level unable to overcome the force of the spring. Figure 7 presents an approach to achieve an almost complete closure of the exhaust duct by the valve assembly described when the valve flap is placed in its fully closed position. As seen from figure 7, the space areas such as 120 and 122 in figure 1B are substantially eliminated by flattening the sides of the duct 700 so that they conform more closely to the general peripheral shape of the valve flap 710 Section 724 and section 726 are flat areas of duct 700 to make the first and second linear edges of valve flap 710 more parallel. Obviously it will be apparent to those skilled in the art that some space between the linear edges of valve flap 710 and Duct walls 724 and 726 must be present to prevent obstruction of the valve flap by rotation. An illustrative application of the described valve set is for a muffler for the self-propelled exhaust system, as illustrated in the figure
8. The muffler 800 has a housing comprised of a substantially cylindrical outer shell 818 closed at the inlet and outlet ends by an inlet head 810 and an outlet head
812. A partition 814 is attached to the outer casing 818 in a position to define the silencing chambers 824 and 826 on each side. The partition 814 additionally includes at least one opening 820, 822 allowing fluid communication between chambers 824 and 826 inside the muffler
800. Optionally, the 816 sound-absorbing material can be placed in one or both of the internal muffler chambers.
Extending through the muffler 800 through the passage through the input head 810, the partition 814 and the output head 812 is a hollow tube 802. The tube 802 includes a first plurality of perforations 806 allowing an inlet section of the tube 802 have fluid communication 5 with the 824 muffler chamber surrounding it.
Tube 802 has a second plurality of perforations 808 at one outlet end allowing fluid communication from chamber 826 surrounding it with tube 802. Positioned between the first and second sets of perforations - tube 802 is a valve assembly 100 arranged as previously described in conjunction with figures 1A to 4B.
In this way, in the closed position of valve assembly 100, the exhaust will enter silence 800 at the inlet end 828 of tube 802 as seen in figure 8 and will flow through perforations 806 into the absorption material. of sound 816 surrounding the tube in chamber 824. The exhaust then flows from the first chamber 824 to the second chamber 826 through the openings 820, 822 in the partition 814. Finally, the exhaust flows from the second chamber 826 through of the perforations 808 through the tube 802 and exits through an outlet end 830 of the tube 802 as seen from figure 8. 20 When the exhaust pressure is high enough to overcome the force of the guide spring 106, the valve flap 118 will open to an almost horizontal position within the 802 tube to essentially cause most of the exhaust gas to exceed the first and second chambers and their associated sound-absorbing material.
Since the flap 110 25 will be substantially horizontal in figure 8 in the fully closed position, the back pressure in the muffler 800 is minimized.
Another illustrative application of the described valve assembly includes an automotive exhaust system muffler 900, as illustrated in figure 9. 30 The muffler 900 includes a housing 902 including an outer shell 904 having a substantially oval cross shape closed in the inlet and outlet ends by an inlet head 906 and an outlet head 908. A partition 910 is attached to the outer casing 904 in a position to define a first muffler chamber 912 between the inlet head 906 and the partition 910 A second silencer chamber 914 is defined as the volume between the partition 910 and the output head 5 908. The partition 910 includes a plurality of openings 916 extending through it allowing fluid communication between the first chamber 912 and the second chamber 914 inside the muffler 900. A sound-absorbing material such as fiberglass roving 918 can be positioned within the first chamber 91 2. No sound-absorbing material 10 is located inside the second chamber 914. A tube 920 includes an inlet 922 and an outlet 924. In the example shown in figure 9, tube 920 includes an inlet section 926 coupled to a outlet section 928. Inlet head 906 includes opening 930 when receiving inlet section 926. Similarly, outlet head 908 includes opening 932 in receiving outlet section 928. Inlet section 926 is folded so that inlet 922 can be aligned with a central longitudinal axis of housing 902 while outlet 924 is transversely offset from the central longitudinal axis.
Inlet section 926 includes a reduced diameter part 936 positioned within outlet section 928. Partition 910 includes an opening 938 in receiving tube 920. An overlapping joint between inlet section 926 and outlet section 928 is aligned with and supported by partition 910. Tube inlet section 926 includes a plurality of openings 942 positioned providing fluid communication between inlet 922 of inlet section 926 and the first chamber of silencer 912. O valve assembly 100, as previously described in conjunction with figures 1A to 4B, is positioned within outlet section 928 of tube 920 in a position proximal to outlet head 908. More particularly, when the flap of the valve 110 is in the closed position, the exhaustion will enter inlet 922, pass through openings 942, enter first silencer chamber 912, pass through openings 916 and enter
will bring you to the second chamber of silencer 914. While valve 100 is closed, a relatively small volume flow rate passes through a space or passage between valve flap 110 and an inner surface of outlet section 928. The small passage in around the 5 valve flap 110 works to absorb low frequencies within the exhaust stream. Since outlet section 928 is a closed cylindrical element, the exhaust does not flow through the first chamber 912 and the second chamber
914. Acoustic waves are present, but the volume flow rate of the exhaust through the first chamber 912 and the second chamber 914 is minimum 10 mA. The sound-absorbing material 918 works to attenuate noise regardless of the position of the valve flap 110. When the exhaust pressure is high enough to overcome the force of the guide spring 106, the valve flap 110 rotates in the direction from an open position. In a fully open position, valve flap 15 110 extends substantially horizontally within tube 920 to minimize back pressure in muffler 900. It should be appreciated that since no sound-absorbing material is placed inside the second - from chamber 914, no interference between the sound-absorbing material 918 and the valve assembly 100 occurs. 20 An upstream end 954 of rear tube 952 is coupled in fluid communication with outlet 924 of outlet section 928. Rear tube 952 includes an open end or outlet 950 in communication with the atmosphere. The resonance can exist inside the rear tube 952 and the part of the outlet section 928 that is downstream of the valve 100 due to the 25 straight exhaust waves that are formed in that part of the exhaust system. Regardless of the angular position of valve flap 110, 100% of the exhaust flows through valve assembly 100. As such, the axial position of valve assembly 100 can be set to minimize the resonance that can occur within the pipe. rear 952 and muffler 900. By positioning the valve flap 110 in a location downstream of the openings 942, the first chamber 912 and the second chamber 914 are isolated from the rear tube. Unwanted resonance or “drone” is avoided.
In previous systems, outlet 950 of rear tube 952 was located in open fluid communication with an expanded volume within the muffler envelope 904. The expanded volume worked to amplify and / or otherwise excite a resonant condition within 5 rear tube resulting in an undesirable noise.
The positioning of the valve flap 110 downstream of the expanded volume within the silencer 900 se- for the relatively long straight waves inside the rear tube 952 of increased volumes within the enclosure 904. Unwanted noise and drone are not amplified. 10 The valve 100 is positioned at the upstream end of the rear pipe 952 separating the parts of the exhaust system having very different cross-sectional areas.
For example, the cross-sectional area of the second chamber 914 may be greater than or equal to three times the cross-sectional area of the rear tube 952. The straight wave nodes formed within the rear tube 952 will be located at outlet 950 and the flap of valve 110. By positioning valve 100 in this way, the resonance of all frequencies formed inside the rear tube 952 will be minimized.
To optimize the noise attenuation function of valve 100, the valve is positioned close to the outer head 908. More particularly, the shaft 12 is axially spaced from the outlet head 908 by a distance less than or equal to a quarter of the distance between inlet head 906 and outlet head 908. Figures 12 to 16 show mufflers having a single inlet, two outlets, and at least one passive pressure action valve 25.
At certain times, vehicle manufacturers can configure the exhaust systems to match the exhaust of each of the engine cylinders in a single pipe or tube.
The single tube extends backwards in fluid communication with an inlet tube of a muffler assembly.
From the rear location of the muffler, the exhaust system is divided into two or more rear tubes.
The mufflers of figures 12 to 16 can be used in this order.
Figure 12 shows a 1200 muffler including a housing.
1202, an input head 1204, an output head 1206, a first partition 1208 and a second partition 1210. An inlet tube 1212 extends through the input head 1204 and the first partition 1208 to provide exhaust an internal combustion engine 5 for a layer 1214. A first outlet tube 1216 extends through the inlet head 1204 and first partition 1208. A first open end 1218 of the first outlet tube 1216 is in fluid communication with the chamber 1214. The first outlet tube 1216 includes an outlet 1220 in communication with the atmosphere.
A first valve assembly 10 100a is positioned inside the first outlet tube 1216. A second outlet tube 1230 extends through outlet head 1206 and second partition 1210. A first open end 1232 of the second outlet tube 1230 is in fluid communication with chamber 1214. A second open end 1234 is in fluid communication with the atmosphere.
A second valve 100b is positioned inside the second outlet tube 1230. Valves 100a and 100b are substantially similar to the valve 100 previously described.
The muffler 1200 is arranged to facilitate the assembly of a muffler so that each of the inlet and outlet pipes extends across the vehicle.
The first partition 208 and the second partition 1210 include openings 1240 and 1242, respectively.
As such, chamber 1214 extends the entire length of housing 1202 from input head 1204 to output head 1206. Figure 13 shows a muffler 1300 including housing 1302 capped by an input head 1304 and an output head 1306. A first partition 1308 defines a first cavity 1310. A second partition 1312 defines a second cavity 1314 and a third cavity 1316. The first partition 1308 includes a plurality of perforations 1318 extending through the same.
An opening 1320 extends through the second partition 1312. As such, each of the first cavity 1310, second cavity 1314 and third cavity 1316 is in fluid communication with each other.
An inlet tube 1330 extends through inlet head 1304 and first partition 1308. A plurality of perforations 1332 extends through the wall of tube 1330 placing an internal volume of inlet tube 1330 in fluid communication with the first cavity 5 1310. An insulator such as fiberglass sound-absorbing material 1334 is positioned inside the first cavity 1310. A first outlet tube 1340 extends through the outer head 1306 and second partition 1312. A first open end 1342 of the first outlet tube 1340 is in fluid communication with the second cavity 1314 and spaced 10 from the inlet tube 1330. The first valve 100a is positioned within the first outlet tube 1340. A second outlet tube 1350 includes a first open end 1352 in fluid communication with the second chamber 1314. A second open end 1354 is in fluid communication with the atmosphere. A second valve 100b is positioned inside the second outlet pipe 1350. Figure 14 shows another single inlet and double outlet muffler identified in the numerical reference 1400. The muffler 1400 is substantially similar to the muffler 1300. As such, similar elements will retain their previously introduced numerical references plus 100. 20 The 1400 muffler differs from the 1300 muffler in that the upstream ends 1470 and 1742 of the first outlet tube 1440 and 1450, respectively, are in fluid communication. with the other and coupled to an outlet 1474 of the inlet pipe 1430. More particularly, an inlet 1476 is formed at the upstream end of the first outlet pipe 25 1440 and is on receiving the exhaust flowing through the inlet pipe
1430. Similarly, an inlet 1748 is formed at one end upstream of the second outlet tube 1450 and is receiving exhaustion flowing through the inlet tube 1430. Inlet 1476 and inlet 1478 are positioned adjacent to each other. other. In the arrangement shown 30 in figure 14, the exhaust can pass through the inlet pipe 1430, perforations 1432, sound-absorbing material 1434, first partition openings 1418 and second partition openings 1420 to fully fill
the cavities defined by housing 1402. Figure 15 shows another silencer identified by the numerical reference 1500. The silencer 1500 is substantially similar to the silencer 1400. Accordingly, similar elements will be identified by numerical references 5 increased by 100. The muffler 1500 differs from muffler 1400 in that the first perforated partition 1408 is removed and additional perforations 1580 extend through a portion of the first outlet tube 1540 at a location upstream of valve 100a.
Perforations 1582 extend through the second outlet tube 1550 at a location upstream of valve 100a.
The sound-absorbing material 1534 extends axially over a greater distance than the sound-absorbing material 1434 due to the removal of the first partition 1408. With reference to figure 16, another silencer arrangement is illustrated by the numerical reference 1600. The 1600 muffler shares similar characteristics with the 1400 muffler. Similar elements will be identified with numerical references increased by 200. The 1600 muffler differs from the 1400 muffler in that the second partition 1412 is removed and the inlet tube 1630 include an increased length extending inward beyond divider 1608. A single pressure action valve 108 is positioned at one end downstream of inlet tube 1630 upstream of an inlet 1676 of the first outlet tube 1640 and an inlet 1678 of the second outlet tube 1650. It should be noted that in each of the mufflers illustrated in figures 12 to 16, 100% of the exhaust gas flowing at through the silencer it must pass through valve 25 or valves 100a, 100b positioned there.
In addition, each of the valves serves to separate rear tube parts of substantially constant diameter from the exhaust system from the relatively increased cross-sectional parts of the muffler to minimize resonant conditions. 30 The description was described together with a detailed description of the modalities described for the purposes of example only.
The scope and spirit of the description must be determined from an appropriate interpretation of the appended claims.

权利要求:
Claims (27)
[1]
1. Muffler for an internal combustion engine exhaust system, the muffler comprising: a housing having an external casing and 5 inlet and outlet heads enclosing the opposite ends of the casing; a partition within the housing dividing a housing interior within the first and second chambers, the first chamber having sound absorbing material positioned within it, the partition having at least one opening through it providing the community with 10 fluid communication between the first and second chambers; a hollow tube extending through the inlet and outlet heads and the partition and having a plurality of perforations allowing fluid communication between the hollow tube and the first chamber; and a valve assembly having a substantially flat valve flap positioned within the hollow tube to rotate with an axis pivotally coupled to the tube, the valve flap being rotatable between a closed position and an open position, where a plane of the valve flap is substantially parallel to a longitudinal geometric axis of the hollow pipe, where the valve is positioned downstream of the pipe perforations so that all the exhaust gas flowing through the muffler passes through the valve regardless of the valve flap position.
[2]
2. Silencer according to claim 1, in which the valve separates an upstream part of the pipe having a first cross-sectional area of a downstream muffler cavity having a second cross-sectional area more than three times the first cross-sectional area.
[3]
3. Silent according to claim 1, in which the valve is positioned adjacent to the outlet head.
[4]
4. Silent, according to claim 1, in which the valve is positioned axially downstream of the partition and upstream of the exit head.
[5]
5. Silent, according to claim 1, in which the first chamber is joined by the inner head and the partition, the second chamber being joined by the partition and the outer head.
[6]
6. Silencer according to claim 1, additionally including a guiding element forcing the valve flap in the direction of the closed position, the guiding element mounted outside the hollow tube 5 inside the second chamber.
[7]
7. Silent according to claim 6, in which the exhaust pressure in the hollow tube forces the valve flap to the open position when the exhaust pressure is high enough to overcome the force of the guiding element . 10
[8]
8. Silencer according to claim 1, in which the second chamber is substantially devoid of sound-absorbing material.
[9]
9. Silencer according to claim 1, in which the hollow tube passes through the outlet head in a position deviated from a central longitudinal geometric axis of the outer casing. 15
[10]
10. Silencer according to claim 9, in which the hollow tube passes through the inner head in a position substantially centered around the central longitudinal geometric axis.
[11]
11. Silencer according to claim 1, in which the valve flap in the closed position forms an intersection with the longitudinal geometric axis 20 of the hollow pipe at an acute angle.
[12]
12. Silent according to claim 1, in which the internal volume of the tube downstream of the valve is isolated from the second chamber by an uninterrupted wall.
[13]
13. Silent, according to claim 1, in which the 25 inlet and outlet heads are spaced by a first distance, the valve shaft being spaced from the outlet head by a second distance equal to or less than a quarter of the first distance.
[14]
14. Muffler for an internal combustion engine exhaust system, the muffler comprising: 30 a housing having an external wrap and inlet and outlet heads enclosing opposite ends of the wrap; a partition inside the housing dividing an interior of the room
flow in a first chamber extending from the input head to the partition and a second chamber extending from the partition to the exit head; a hollow tube extending through the inlet and outlet heads and the partition and having a plurality of perforations that allow fluid communication between the hollow tube and the first chamber, the part of the tube extending through the second chamber being devoid of perforations; and a valve assembly having a substantially flat valve flap positioned within the hollow tube to rotate with an axis pivotally coupled to the tube, the valve flap being rotatable between a closed position and an open position where a plane of the valve flap is substantially parallel to a longitudinal geometric axis of the hollow pipe, where the valve is positioned within the second chamber downstream 15 of the pipe perforations to separate the first and second chamber of the pipe downstream of the valve when the valve is closed.
[15]
15. Muffler according to claim 14, in which the valve separates a part downstream of the pipe having a first cross-sectional area from an upstream muffler cavity having a second cross-sectional area more than three times the first cross-sectional area.
[16]
16. Silent, according to claim 15, in which the inlet and outlet heads are spaced by a first distance, the valve shaft being spaced from the outlet head by a second distance equal to or less than one quarter of the first distance. 25
[17]
17. Silent according to claim 16, additionally including a guiding element forcing the valve flap towards the closed position, the guiding element mounted outside the empty pipe inside the second chamber.
[18]
18. Silencer according to claim 17, in which the exhaust pressure in the hollow tube forces the valve flap to the open position when the exhaust pressure is high enough to overcome the guiding element force.
[19]
19. Silent according to claim 18, in which the hollow tube passes through the outlet head in a position deviated from a central longitudinal geometric axis of the outer casing.
[20]
20. Silent according to claim 19, in which the hollow tube 5 passes through the inlet head in a position substantially centered around the central longitudinal geometric axis.
[21]
21. Muffler for an internal combustion engine exhaust system, the muffler comprising: a housing having an external casing and 10 inlet and outlet heads enclosing opposite ends of the casing; an inlet tube extending through the inlet head; a first outlet tube extending through the outlet head; 15 a second outlet tube extending through one of the inlet and outlet heads; a first valve assembly having a substantially flat valve flap positioned within the first outlet tube to pivot with an axis pivotally coupled to the first outlet tube, the valve flap being rotatable between a closed position and an a-position. open where a plane of the valve flap is substantially parallel to a longitudinal geometric axis of the first outlet pipe; and a second valve assembly having a substantially flat valve flap positioned within the second outlet tube to pivot with a pivotally coupled shaft to the second outlet tube, the valve flap being rotatable between a closed position and an open position where a plane of the valve flap is substantially parallel to a longitudinal geometric axis of the second outlet pipe, where the first and second valves are positioned so that all exhaust gas 30 flowing through the muffler passes through the valves.
[22]
22. Quiet, according to claim 21, additionally including a partition inside the housing dividing the interior of the accommodation.
[23]
first and second chambers, the first chamber having sound-absorbing material positioned in it, the partition having at least one opening through it providing fluid communication between the first and second chambers. 23. Silencer according to claim 22, in which the inlet tube, the first outlet tube and the second outlet tube each include a free end within the housing spaced from other free ends.
[24]
24. Silencer according to claim 22, in which the first outlet tube and the second outlet tube each include upstream ends coupled in fluid communication with a downstream end of the inlet tube.
[25]
25. Silent according to claim 24, in which the parts of the first and second outlet tubes upstream of the valves include perforations.
[26]
26. Silencer according to claim 21, in which the inlet tube includes a plurality of perforations allowing fluid communication between the inlet tube and an interior of the housing.
[27]
27. Muffler for an internal combustion engine exhaust system, the muffler comprising: a housing having an external casing and inlet and outlet heads enclosing opposite ends of the casing; an inlet tube extending through the inlet head and having a plurality of perforations allowing fluid communication between the inlet tube and an interior of the housing; a partition within the housing dividing an interior of the accommodation into first and second chambers, the first chamber having sound absorbing material positioned within it, the partition having at least one opening through it providing communication 30 tion by fluid between the first and second chambers; a first outlet tube extending through the outlet head and having an upstream end coupled in communication
fluid with a downstream end of the inlet tube; a second outlet tube extending through the outlet head and having an upstream end coupled in fluid communication with an end downstream of the inlet tube; and 5 a valve assembly having a substantially flat valve flap positioned within the inlet tube to rotate with an axis pivotally coupled to the inlet tube, the valve flap being rotatable between a closed position and a position open where a plane of the valve flap is substantially parallel to a longitudinal geometric axis of the inlet pipe, where the valve is positioned so that all of the exhaust gas flowing through the muffler passes through the valve.

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同族专利:

公开号 | 公开日

US8468813B2|2013-06-25|

CN103270262A|2013-08-28|

CN103270262B|2016-10-19|

JP2013543953A|2013-12-09|

KR20130113477A|2013-10-15|

KR101570971B1|2015-11-23|

WO2012074893A3|2012-10-04|

EP2646661A4|2015-08-19|

WO2012074893A2|2012-06-07|

EP2646661A2|2013-10-09|

KR20140114387A|2014-09-26|

EP2646661B1|2017-09-20|

US20110061969A1|2011-03-17|

EP3296532B1|2021-05-26|

EP3296532A1|2018-03-21|

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法律状态:
2021-05-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

2021-08-24| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

2021-12-28| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

2022-02-22| 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 28/11/2011, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO. |

优先权:

申请号 | 申请日 | 专利标题

US12/955,199|US8468813B2|2007-03-16|2010-11-29|Snap-action valve for exhaust system|

US12/955,199|2010-11-29|

PCT/US2011/062179|WO2012074893A2|2010-11-29|2011-11-28|Snap-action valve for exhaust system|

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