CN113027598A - Turbocharger and engine system of automobile - Google Patents
Turbocharger and engine system of automobile Download PDFInfo
- Publication number
- CN113027598A CN113027598A CN202110354247.3A CN202110354247A CN113027598A CN 113027598 A CN113027598 A CN 113027598A CN 202110354247 A CN202110354247 A CN 202110354247A CN 113027598 A CN113027598 A CN 113027598A
- Authority
- CN
- China
- Prior art keywords
- rocker arm
- turbocharger
- connecting rod
- valve cover
- volute
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
- F02B37/183—Arrangements of bypass valves or actuators therefor
- F02B37/186—Arrangements of actuators or linkage for bypass valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses a turbocharger of an automobile and an engine system, wherein the automobile comprises an engine, the turbocharger comprises a volute and a bypass valve mechanism, the volute is arranged on the engine, and an exhaust gas hole is formed in the volute; the bypass valve mechanism is arranged close to the volute and comprises a pull rod, a rocker arm and a valve cover, the valve cover is arranged on the waste gas hole, the first end of the rocker arm is connected with the pull rod, the second end of the rocker arm is connected with the valve cover, and the pull rod is used for driving the rocker arm to rotate relative to the volute so as to drive the valve cover to open or close the waste gas hole. In the normal use process of the turbocharger, the rocker arm is driven to swing through the pull rod, so that the rocker arm drives the valve cover to move, the valve cover opens or closes the waste gas hole, the exhaust gas discharge flow of the turbocharger is adjusted, the rear air inlet pressure of the air compressor is controlled by adjusting the rotating speed of the turbocharger, and the normal operation of an engine system is ensured.
Description
Technical Field
The invention relates to the technical field of automobile manufacturing, in particular to a turbocharger and an engine system of a turbo automobile.
Background
The turbocharger of the engine utilizes the exhaust energy after the combustion of the engine to do work to push the turbine to rotate at a high speed, and the turbine rotates to drive the coaxial compressor impeller to compress fresh air, so that the air inflow is increased, and the dynamic property of the engine is improved. In order to ensure that the rear air pressure of the air compressor does not exceed the target pressure, the flow of the exhaust gas passing through the turbine is controlled by adjusting the exhaust gas bypass valve arranged at the turbine, so that the rotating speed of the turbocharger is adjusted to control the rear air pressure of the air compressor, and if the air pressure is not adjusted, the engine is easily damaged, the service life of an automobile is influenced, so that the bypass valve mechanism is required to be provided for effectively adjusting the flow of the exhaust gas of the bypass valve of the automobile turbocharger.
Disclosure of Invention
The invention mainly aims to provide a turbocharger and an engine system of an automobile, and aims to solve the problem that the exhaust gas flow of a bypass valve of the turbocharger cannot be effectively adjusted in the prior art.
To achieve the above object, the present invention provides a turbocharger for an automobile including an engine, the turbocharger comprising:
the volute is mounted on the engine, and an exhaust gas hole is formed in the volute;
the bypass valve mechanism is close to the volute, the bypass valve mechanism comprises a pull rod, a rocker arm and a valve cover, the valve cover is arranged on the waste gas hole, the first end of the rocker arm is connected with the pull rod, the second end of the rocker arm is connected with the valve cover, the pull rod is used for driving the rocker arm to rotate relative to the volute so as to drive the valve cover to open or close the waste gas hole.
Preferably, the valve cover comprises a connecting rod and a sealing head, the sealing head is arranged at one end of the connecting rod, the other end of the connecting rod is connected with the second end of the rocker arm, and the pull rod is used for driving the rocker arm and the connecting rod to rotate relative to the volute so as to drive the sealing head to open or close the exhaust gas hole.
Preferably, the sealing head is of a hemispherical structure with a plane and a spherical surface, the spherical surface of the sealing head is used for contacting with the hole wall of the exhaust gas hole to close the exhaust gas hole, and the plane of the sealing head is provided with a connecting plate which is connected with the connecting rod.
Preferably, the junction of connecting plate with the connecting rod has the sign district, the sign district is provided with identification structure.
Preferably, the sealing head is integrally formed with the connecting rod.
Preferably, the bypass valve mechanism further comprises a sleeve, the sleeve is sleeved outside the connecting rod, the connecting rod can rotate relative to the sleeve, and the sleeve is detachably connected with the volute.
Preferably, a threaded mounting hole is formed in the volute, a crimping thread is arranged at one end, close to the rocker arm, of the sleeve, and the sleeve is crimped in the mounting threaded mounting hole through the crimping thread.
Preferably, the rocker arm is of a long strip plate-shaped structure, the pull rod, the connecting rod and the rocker arm are perpendicular to each other, the extension direction of the pull rod is consistent with the width direction of the rocker arm, and the extension direction of the connecting rod is consistent with the thickness direction of the rocker arm.
Preferably, the valve cover is a high nickel based alloy steel.
The invention also proposes an engine system comprising a turbocharger as described above.
The bypass valve mechanism is arranged close to a waste gas hole of the volute, the valve cover is welded at the second end of the rocker arm, the valve cover is guaranteed to be stably connected with the rocker arm, meanwhile, abnormal sound caused by mutual knocking of the valve cover and the rocker arm due to clearance fit of the valve cover and the rocker arm is avoided, and in the normal use process of a turbocharger of an automobile, the rocker arm is driven by the pull rod to swing, so that the rocker arm drives the valve cover to move, the valve cover opens or closes the waste gas hole, the waste gas discharge flow of the turbocharger is adjusted, the rear air pressure of the compressor is controlled by adjusting the rotating speed of the turbocharger, and the normal operation of an engine system is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of a turbocharger volute of an automobile according to an embodiment of the present invention;
FIG. 2 is an exploded perspective view of a bypass valve mechanism of a turbocharger of an automobile according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a valve cover and an exhaust gas hole of a turbocharger of an automobile according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | Scroll casing | 23 | Valve |
| 11 | |
231 | Connecting |
| 12 | Threaded |
232 | |
| 2 | |
233 | Connecting |
| 21 | |
234 | |
| 22 | Rocker |
24 | |
| 221 | |
241 | Crimping |
| 222 | Second end |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The description of the orientations of "up", "down", "left", "right", "front", "back", etc. in the present invention, with reference to the orientations shown in fig. 1 to 3, is merely used to explain the relative positional relationship between the respective components in the postures shown in fig. 1 to 3, and if the specific posture is changed, the directional indication is changed accordingly.
The invention provides a turbocharger of an automobile.
As shown in fig. 1 to 3, in the present embodiment, the automobile includes an engine, and the turbocharger includes a volute 1 and a bypass valve mechanism 2, wherein the volute 1 is mounted on the engine, and the volute 1 is provided with an exhaust gas hole 11; the bypass valve mechanism 2 is arranged close to the volute, the bypass valve mechanism 2 comprises a pull rod 21, a rocker arm 22 and a valve cover 23, the valve cover 23 is covered on the exhaust gas hole 11, a first end 221 of the rocker arm 22 is connected with the pull rod 21, a second end 222 of the rocker arm 22 is connected with the valve cover 23, and the pull rod 21 is used for driving the rocker arm 22 to rotate relative to the volute so as to drive the valve cover 23 to open or close the exhaust gas hole 11.
Specifically, the bypass valve mechanism 2 of the embodiment is disposed near the exhaust gas hole 11 of the scroll 1, the valve cover 23 is welded at the second end 222 of the rocker arm 22, so as to ensure the stable connection between the valve cover 23 and the rocker arm 22, and meanwhile, the abnormal sound caused by the mutual knocking of the valve cover 23 and the rocker arm 22 due to the clearance fit between the valve cover 23 and the rocker arm 22 is avoided, during the normal use process of the turbocharger of the automobile, the first end 221 of the rocker arm 22 is driven to swing by the pull rod 21, so that the second end 222 of the rocker arm 22 drives the valve cover 23 to move, the valve cover 23 opens or closes the exhaust gas hole 11, the exhaust gas discharge flow of the turbocharger is adjusted, the rear intake pressure of the compressor is controlled by adjusting the rotating speed of the turbocharger, and the normal operation of.
In another embodiment of the invention, the valve cover 23 is also hinged with the scroll 1, when the turbocharger of the automobile is normally used, the rocker arm 22 is driven to swing through the pull rod 21, so that the rocker arm 22 drives the valve cover 23 to rotate relative to the scroll 1 to open or close the exhaust gas hole 11, the valve cover 23 is hinged on the scroll 1, and therefore, the problem that the valve cover 23 cannot normally close or open the exhaust gas hole 11 to adjust the exhaust gas discharge flow of the turbocharger due to deviation of the valve cover 23 and the exhaust gas hole 11 when severe impact and other situations occur can be effectively avoided, and the service life and the adjustment stability of the valve cover 23 are ensured.
Further, as shown in fig. 2, in the present embodiment, the valve cover 23 includes a connecting rod 231 and a sealing head 232 disposed at one end of the connecting rod 231, the other end of the connecting rod 231 is connected to the second end 222 of the rocker arm 22, and the pull rod 21 is configured to drive the rocker arm 22 and the connecting rod 231 to rotate relative to the volute to drive the sealing head 232 to open or close the exhaust gas hole 11. Connecting rod 231 and rocking arm 22 welding, the firm connection of connecting rod 231 and rocking arm 22 has been guaranteed, connecting rod 231 and volute 1 are articulated simultaneously, when the turbo charger of car normally used, first end 221 through pull rod 21 drive rocking arm 22 swings, make second end 222 of rocking arm 22 drive connecting rod 231 rotate for volute 1, thereby make the sealing head 232 of connecting in connecting rod 231 one side rotate around connecting rod 231, make sealing head 232 open or close exhaust gas hole 11, with the exhaust emission flow who adjusts turbo charger, connecting rod 231 has lengthened the connecting lever between rocking arm 22 and the sealing head 232, make the accommodation process of sealing head 232 more stable effectively simultaneously, still make sealing head 232's rotation range grow, thereby the exhaust emission flow of the regulation exhaust gas hole 11 that can the wider, the accommodation range of exhaust emission flow has been enlarged.
In this embodiment, as shown in fig. 2 and 3, the sealing head 232 is hemispherical, the sealing head 232 has a flat surface and a spherical surface, the spherical surface of the sealing head 232 is used for contacting with the hole wall of the exhaust gas hole 11 to close the exhaust gas hole 11, the flat surface of the sealing head 232 is provided with a connecting plate 233, and the connecting plate 233 is connected with the connecting rod 231. The valve gap 23 sealing head 232 of this implementation is the hemispherical structure, can guarantee that valve gap 23 and exhaust gas hole 11 all have good sealing performance under any angle, and receives the wearing and tearing back at sealing head 232, and the sealing head 232 of bulb type can continue to push down and effectively close the exhaust gas hole 11 and seal for sealing head 232 still has good sealing performance under the condition that receives certain wearing and tearing, has effectively improved bypass valve mechanism 2's life.
In this embodiment, as shown in fig. 2, an identification region 234 is provided at a connection position of the connection plate 233 and the connection rod 231, and the identification region 234 is used for identifying the model of the valve cover 23. An identification area 234 for identifying the type of the valve cover 23 is arranged at the connection position of the connecting plate 233 and the connecting rod 231, so that the type of the valve cover 23 can be quickly identified when the valve cover 23 needs to be replaced, and the corresponding valve cover 23 can be found for replacement.
In this embodiment, as shown in fig. 2, the sealing head 232 is integrally formed with the connecting rod 231. The sealing head 232 and the connecting rod 231 are integrally formed, so that the number of parts is reduced, the processing requirements of the parts are reduced, the manufacturing cost of the valve cover 23 is reduced, and the manufacturing cost of the bypass valve mechanism 2 is reduced.
In this embodiment, as shown in fig. 2, the bypass valve mechanism 2 further includes a sleeve 24, the sleeve 24 is sleeved outside the connecting rod 231, the connecting rod 231 can rotate relative to the sleeve 24, and the sleeve 24 is detachably connected to the volute 1. Through the rotation connection of sleeve 24 connecting rod 231, the normal rotation of connecting rod 231 has been guaranteed for thereby connecting rod 231 can drive sealed head 232 and rotate and make sealed head 232 effectively open or sealed exhaust gas hole 11, has paintd lubricating oil in the sleeve 24 simultaneously, guarantees the rotation smoothness nature of connecting rod 231.
Further, as shown in fig. 1 and 3, a threaded mounting hole 12 is formed in the scroll 1, a pressing thread 241 is provided at an end of the sleeve 24 adjacent to the rocker arm 22, and the sleeve 24 is press-fitted into the mounting threaded mounting hole 12 by the pressing thread 241. The sleeve 24 is directly pressed on the volute 1 through the pressing thread 241, so that the assembly is convenient and simple, and the assembly efficiency of the bypass valve mechanism 2 is improved.
In this embodiment, as shown in fig. 2, the rocker arm 22 is a strip-shaped plate-shaped structure, the pull rod 21, the connecting rod 231 and the rocker arm 22 are arranged perpendicular to each other, the extending direction of the pull rod 21 is the same as the width direction of the rocker arm 22, and the extending direction of the connecting rod 231 is the same as the thickness direction of the rocker arm 22. The pull rod 21, the rocker arm 22 and the connecting rod 231 are perpendicular to each other, and the extension directions of the pull rod 21, the rocker arm 22 and the connecting rod 231 are three-dimensionally arranged, so that the pull rod 21, the rocker arm 22 and the connecting rod 231 can be effectively transmitted, and the sealing head 232 can rotate to open or seal the exhaust gas hole 11.
In this embodiment, the valve cover 23 is made of high nickel-based alloy steel. The nickel alloy steel has good toughness and corrosion resistance, the service life of the valve cover 23 is guaranteed, the valve cover 23 is prevented from being corroded by waste gas in the waste gas hole 11, meanwhile, the nickel alloy steel has good weldability, the connecting rod 231 of the valve cover 23 is conveniently welded with the rocker arm 22, and the assembly efficiency of the bypass valve mechanism 2 is improved.
The invention also provides an automobile engine system which comprises the turbocharger. The specific structure of the turbocharger of the automobile refers to the above embodiment, and since the automobile engine system adopts all technical solutions of the above embodiment, at least all beneficial effects brought by the technical solutions of the above embodiment are achieved, and no further description is given here.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A turbocharger for an automobile, the automobile including an engine, the turbocharger comprising:
the volute is mounted on the engine, and an exhaust gas hole is formed in the volute;
the bypass valve mechanism is close to the volute, the bypass valve mechanism comprises a pull rod, a rocker arm and a valve cover, the valve cover is arranged on the waste gas hole, the first end of the rocker arm is connected with the pull rod, the second end of the rocker arm is connected with the valve cover, the pull rod is used for driving the rocker arm to rotate relative to the volute so as to drive the valve cover to open or close the waste gas hole.
2. The automotive turbocharger according to claim 1, wherein the valve cover comprises a connecting rod and a sealing head, the sealing head is disposed at one end of the connecting rod, the other end of the connecting rod is connected to the second end of the rocker arm, and the pull rod is used for driving the rocker arm and the connecting rod to rotate relative to the volute so as to drive the sealing head to open or close the exhaust gas hole.
3. The turbocharger for automobiles according to claim 2, wherein said sealing head has a hemispherical structure having a flat surface and a spherical surface, said spherical surface of said sealing head is adapted to contact with a wall of said exhaust hole to close said exhaust hole, and said flat surface of said sealing head is provided with a connecting plate, said connecting plate being connected to said connecting rod.
4. The turbocharger for an automobile according to claim 3, wherein the connection of the connecting plate and the connecting rod has a logo area, and the logo area is provided with a logo structure.
5. The automotive turbocharger of claim 2, wherein the seal head is integrally formed with the connecting rod.
6. The turbocharger for automobiles according to claim 2, wherein said bypass valve mechanism further comprises a sleeve, said sleeve is fitted over said connecting rod, said connecting rod can rotate relative to said sleeve, and said sleeve is detachably connected to said volute.
7. The turbocharger for an automobile according to claim 6, wherein the volute has a threaded mounting hole, and the end of the sleeve adjacent to the rocker arm has a press-fit thread, and the sleeve is press-fitted into the mounting thread mounting hole by the press-fit thread.
8. The turbocharger for automobiles according to claim 2, wherein the rocker arm has a strip-shaped plate-like structure, the pull rod, the connecting rod and the rocker arm are arranged perpendicular to each other, the extension direction of the pull rod is the same as the width direction of the rocker arm, and the extension direction of the connecting rod is the same as the thickness direction of the rocker arm.
9. The turbocharger for automobiles according to any one of claims 1 to 8, wherein the valve cover is a high nickel based alloy steel.
10. An engine system, characterized in that it comprises a turbocharger as claimed in claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110354247.3A CN113027598A (en) | 2021-03-31 | 2021-03-31 | Turbocharger and engine system of automobile |
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|---|---|---|---|
| CN202110354247.3A CN113027598A (en) | 2021-03-31 | 2021-03-31 | Turbocharger and engine system of automobile |
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| CN113027598A true CN113027598A (en) | 2021-06-25 |
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| CN202110354247.3A Pending CN113027598A (en) | 2021-03-31 | 2021-03-31 | Turbocharger and engine system of automobile |
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| CN204476551U (en) * | 2015-01-15 | 2015-07-15 | 奇瑞汽车股份有限公司 | A kind of turbosupercharger exhaust gas bypass actuator |
| CN205330796U (en) * | 2015-11-23 | 2016-06-22 | 神龙汽车有限公司 | Turbo charger waste gas bypass valve actuating mechanism |
| CN206016873U (en) * | 2016-08-29 | 2017-03-15 | 无锡康明斯涡轮增压技术有限公司 | The volute modular construction of turbocharger |
| CN206267956U (en) * | 2016-11-17 | 2017-06-20 | 浙江科技学院 | A kind of turbocharger exhaust gas bypass valve actuating mechanism |
| CN206246221U (en) * | 2016-12-08 | 2017-06-13 | 广西玉柴机器股份有限公司 | Diesel pressure booster |
| CN207048866U (en) * | 2017-03-24 | 2018-02-27 | 奕森科技（上海）有限公司 | A kind of turbocharger bushing and rocking arm axle sealing structure |
| CN107605589A (en) * | 2017-11-02 | 2018-01-19 | 福州大学 | A kind of double vacuum tank gasoline exhaust turbocharger and control method based on by-passing valve control |
| CN107740710A (en) * | 2017-11-15 | 2018-02-27 | 无锡康明斯涡轮增压技术有限公司 | Turbine case shell structure |
| CN108317004A (en) * | 2017-12-19 | 2018-07-24 | 常州科研试制中心有限公司 | Explosion-proof water cooling booster |
| CN207864051U (en) * | 2017-12-22 | 2018-09-14 | 上汽通用五菱汽车股份有限公司 | A kind of turbocharger for gasoline engine |
| CN207847711U (en) * | 2017-12-26 | 2018-09-11 | 江苏毅合捷汽车科技股份有限公司 | A kind of turbine casing lining for turbocharger covers assembling structure |
| CN207813733U (en) * | 2017-12-27 | 2018-09-04 | 江西五十铃发动机有限公司 | A kind of two-stage turbocharger of the double membranous cochleas of twin turbines |
| CN108397279A (en) * | 2018-01-18 | 2018-08-14 | 浙江义利汽车零部件有限公司 | Exhaust gas bypass executing agency and turbocharger with the mechanism |
| CN210178467U (en) * | 2019-06-27 | 2020-03-24 | 浙江吉利控股集团有限公司 | Exhaust gas bypass mechanism of turbocharger |
| CN210264895U (en) * | 2019-09-05 | 2020-04-07 | 无锡速必得涡轮技术有限公司 | Turbocharger |
| CN210289851U (en) * | 2019-09-16 | 2020-04-10 | 无锡速必得涡轮技术有限公司 | Actuating mechanism for exhaust gas bypass valve of turbocharger |
| CN110541754A (en) * | 2019-09-24 | 2019-12-06 | 车行天下网络科技股份有限公司 | Variable flow exhaust gas turbocharger |
| CN112412620A (en) * | 2020-11-20 | 2021-02-26 | 上海汽车集团股份有限公司 | Turbocharger and waste gas bypass valve pneumatic actuating mechanism thereof |
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Application publication date: 20210625 |