Valve body assembly of engine supercharger bypass valve, bypass valve assembly and engine

Abstract

The present invention discloses a valve body assembly of an engine supercharger bypass valve, a bypass valve assembly and an engine. The valve body assembly includes a valve body and a valve stem, and one end of the valve stem is connected to the valve body; the valve body assembly further includes a riveting pin for connecting the valve body and the valve stem. The outer wall surface of the riveting pin is in clearance fit with the inner wall surface of the connection hole of the valve body; a plurality of cavities are circumferentially and spacedly arranged along the inner wall surface of the connection hole of the valve body, and vent holes are arranged at one end of the riveting pin close to the valve body, and the vent holes are respectively communicated with each cavity. Through the setting of this structure, the gas with a certain pressure flowing into the vent holes of the riveting pin can be stored in the cavities and convectively diffused into the gap between the valve body and the riveting pin, so that the gap between the two is often in a "gas" lubrication state, so as to avoid noise and wear caused by jamming and collision, and can further improve the working performance of the engine intake system in this application.

Description

Technical Field

[0001] The present invention relates to the field of automobiles, and particularly to a valve body assembly of an engine supercharger bypass valve, a bypass valve assembly and an engine. Background Art

[0002] With the progress of technology and the continuous pursuit of people for the quality of life, countries have put forward increasingly stringent specifications for energy conservation and emission reduction. The exhaust gas turbocharger utilizes the exhaust energy of the engine to drive the turbine to do work on the compressor to compress the intake air and increase the air density, so as to increase the intake air volume of the engine without changing the engine displacement, and correspondingly burn more fuel to achieve the purpose of increasing the power per liter. At the same time, the work required to compress the air comes from the exhaust gas energy, improving the comprehensive fuel economy of the engine. Turbocharged engines have become the main direction of the development of traditional internal combustion engines today. Common engines are matched with single-stage superchargers. For high-performance engines that pursue higher power per liter and faster response, single-stage superchargers can no longer meet the new target requirements. A large number of studies have found that a more complex two-stage supercharging system composed of two exhaust gas turbochargers in series or one exhaust gas turbocharger and one electric supercharger in series can further increase the power per liter of the supercharged engine, enhance the rapid response and improve the fuel economy.

[0003] For example, Figure 1a is a schematic diagram of the series supercharging system of a two-stage exhaust gas turbocharged engine. The intake air enters from the low-pressure stage compressor C, is compressed and then enters the high-pressure stage compressor C for further compression. The air compressed by the two superchargers is cooled by the intercooler CAC to reach a very high density, and then is introduced into the engine intake pipe and cylinder. The exhaust gas generated after combustion in the cylinder is discharged into the high-pressure stage turbine T to do work on the high-pressure stage compressor, and then the exhaust gas is further discharged into the low-pressure stage turbine T to do work on the low-pressure stage compressor C and then discharged into the aftertreatment device until the atmosphere. The high-pressure stage supercharger C is smaller than the low-pressure stage supercharger C and mainly operates in the medium and low speed range of the engine to compensate for the insufficient capacity of the low-pressure stage supercharger in the medium and low speed state. The high-pressure stage supercharger usually does not work in the high speed range. At this time, the bypass valve provided in the high-pressure stage is opened to bypass the supercharger flow path, and the excellent high-load performance of the low-pressure stage supercharger can be fully utilized.

[0004] Figure 1b is an arrangement of a single-stage exhaust gas turbocharger plus an electric supercharger, where CAC represents the intercooler and T represents the turbine. As Figure 1b shown, the electric supercharger is arranged downstream of the turbocharger intake system and is driven by the motor M controlled by the engine control unit ECU to drive its compressor C. In the low speed range of the engine, when the electric supercharger works, it can improve the torque and rapid response ability of the single-stage turbocharger. In the high speed range, the electric supercharger does not need to work, and the flow path of its compressor C is bypassed. At this time, the bypass valve is opened.

[0005] However, in the process of use, both of the above-mentioned valve body assemblies of the two-stage engine supercharger outlet bypass valves have problems of high noise and poor sealing effect. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems of high noise and poor sealing effect that exist in the outlet bypass valves of two-stage engine superchargers in the prior art during the use process.

[0007] To solve the above problems, an embodiment of the present invention provides a valve body assembly of an engine supercharger bypass valve, including a valve body and a valve stem, one end of the valve stem is connected to the valve body; the valve body assembly further includes a riveting pin for connecting the valve body and the valve stem; wherein,

[0008] Corresponding connection holes are provided on both the valve body and the valve stem. One end of the riveting pin passes through the connection hole from one side of the valve body and extends to the side of the valve stem away from the valve body and is fixed to the valve stem to relatively fix the valve body and the valve stem, and the outer wall surface of the riveting pin is in clearance fit with the inner wall surface of the connection hole of the valve body; and,

[0009] A plurality of cavities are provided at intervals along the circumferential direction of the inner wall surface of the connection hole of the valve body. An air vent hole is provided at one end of the riveting pin close to the valve body, and the air vent holes are respectively communicated with each of the cavities.

[0010] Adopting the above technical solution, in the valve body assembly of this embodiment, since the valve body and the valve stem are connected by a riveting pin, and the outer wall surface of the riveting pin is in clearance fit with the inner wall surface of the connection hole of the valve body, a plurality of cavities are provided at intervals along the circumferential direction of the inner wall surface of the connection hole of the valve body, and an air vent hole is provided at one end of the riveting pin close to the valve body, and the air vent holes are respectively communicated with each of the cavities; through the setting of this structure, when the valve body assembly works, gas can enter the plurality of cavities from the air vent holes and flow into the gap between the outer wall surface of the riveting pin and the inner wall surface of the connection hole, thereby enabling gas lubrication of the riveting pin and the valve body, being able to reduce the noise caused by the collision and friction between the valve body and the riveting pin, and reducing the wear of the valve body.

[0011] Further, another embodiment of the present invention provides a valve body assembly of an engine supercharger bypass valve, and a plurality of side holes corresponding to the cavities are provided on the peripheral wall of the riveting pin, and the air vent holes are respectively communicated with each of the cavities through the corresponding side holes.

[0012] With the above technical solution, in this embodiment, a plurality of side holes corresponding to the cavities are provided on the peripheral wall of the riveting pin, so that when the valve body assembly is working, gas can enter the vent hole and enter the plurality of cavities through the side holes, and flow into the gap between the outer wall surface of the riveting pin and the inner wall surface of the connection hole, thereby enabling gas lubrication between the riveting pin and the valve body.

[0013] Furthermore, another embodiment of the present invention provides a valve body assembly of an engine supercharger bypass valve. The valve body assembly further includes a washer, and the washer is detachably connected to one end of the riveting pin away from the valve body to clamp the valve stem between the washer and the valve body.

[0014] With the above technical solution, in this embodiment, the valve body and the valve stem can be riveted into one body through the washer and the riveting pin, and the disassembly is more convenient.

[0015] Furthermore, another embodiment of the present invention provides a valve body assembly of an engine supercharger bypass valve. The valve body assembly further includes a first sealing ring, and a ring groove is provided on the outer wall of the riveting pin on the side of the cavity close to the valve stem; wherein,

[0016] The first sealing ring is clamped in the ring groove and pressed and sealingly connected between the outer wall surface of the riveting pin and the inner wall surface of the connection hole of the valve body.

[0017] With the above technical solution, the first sealing ring can seal between the outer wall surface of the riveting pin and the inner wall surface of the connection hole of the valve body, thereby improving the sealing performance of the valve body assembly.

[0018] Furthermore, another embodiment of the present invention provides a valve body assembly of an engine supercharger bypass valve. The riveting pin is arranged in a three-stage stepped shaft structure, and the shaft diameter of the riveting pin decreases in sequence from the valve body to the side of the valve stem away from the valve body; and a limiting clamping table is provided at one end of the riveting pin close to the valve body, and the side surface of the limiting clamping table close to the valve body is in clearance fit with the wall surface of the valve body, wherein,

[0019] A limiting portion is provided on the limiting clamping table, and a portion to be limited is provided at a position on the valve body corresponding to the limiting portion. The limiting portion and the portion to be limited are clamped to limit the rotation of the riveting pin relative to the valve body around the axis direction of the connection hole.

[0020] With the above technical solution, in this embodiment, the riveting pin is arranged in a three-stage stepped shaft structure, a limiting portion is provided on the limiting clamping table, and a portion to be limited is provided at a position on the valve body corresponding to the limiting portion. Through this structural arrangement, the riveting pin can better limit the valve stem and the valve body, and ensure the butt joint of the cavity and the side hole.

[0021] Furthermore, another embodiment of the present invention provides a bypass valve assembly for a two-stage supercharger of an engine, comprising a valve housing assembly, a rocker arm assembly, an actuator, and an outlet housing assembly; the bypass valve assembly further comprises a valve body assembly of the above structure; wherein,

[0022] The valve body assembly is installed at the bypass outlet position of the valve housing assembly, the rocker arm assembly and the actuator are installed on the valve housing assembly, the outlet housing assembly is arranged on one side of the valve housing assembly, and the other end of the valve stem in the valve body assembly is transmission-connected to the actuator through the rocker arm assembly. The actuator action drives the valve stem through the rocker arm assembly and links the valve body to switch between an open state and a closed state.

[0023] The above technical solution is adopted. Since the bypass valve assembly in this embodiment includes a valve body assembly of the above structure, and the valve body assembly of the above structure is connected to the valve stem by a rivet pin, the outer wall surface of the rivet pin is clearance-matched with the inner wall surface of the connecting hole of the valve body, and the connecting hole of the valve body is provided with multiple cavities at intervals along the circumference of its inner wall surface, and an air vent is provided at one end of the rivet pin close to the valve body, and the air vent is respectively connected with each cavity; through the setting of this structure, when the valve body assembly is working, gas can enter the multiple cavities from the air vent and flow into the gap between the outer wall surface of the rivet pin and the inner wall surface of the connecting hole, thereby being able to perform gas lubrication on the matching wall surface of the rivet pin and the valve body, thereby being able to slow down the noise caused by the collision and friction between the valve body and the rivet pin, and reducing the wear of the valve body, thereby effectively reducing the noise of the bypass valve assembly.

[0024] Furthermore, another embodiment of the present invention provides a bypass valve assembly for a two-stage supercharger of an engine, wherein the valve housing assembly includes a valve housing having a bypass flow channel, a supercharging channel, and the bypass air outlet and the supercharging air outlet arranged on one side, wherein the bypass air outlet and the supercharging air outlet are connected to the air intake of the engine through the outlet housing assembly;

[0025] One end of the bypass channel is connected to the low-pressure stage supercharger of the two-stage supercharger, and the other end is connected to the bypass air outlet. One end of the boost channel is connected to the low-pressure stage supercharger of the two-stage supercharger, and the other end is connected to the boost air outlet.

[0026] Furthermore, another embodiment of the present invention provides a bypass valve assembly for a two-stage supercharger of an engine, wherein the valve housing assembly further comprises a valve seat sleeve, and a mounting groove is provided at a portion of the valve housing located at an outer periphery of the bypass air outlet; and

[0027] A positioning ring is provided on one side surface of the valve seat sleeve, and a sharp-angle sealing ring is provided on the other side surface;

[0028] The positioning ring on the valve seat sleeve is clamped in the installation groove, and the connection between the positioning ring and the installation groove is sealed; when the valve body is in a closed state, one side wall of the valve body abuts and is sealed against the pointed sealing ring.

[0029] By adopting the above technical solution, the valve seat sleeve in this embodiment can be arranged between the valve body and the valve housing, and a positioning ring is provided on one side surface of the valve seat sleeve, and a pointed sealing ring is provided on the other side surface. This structural setting can not only improve the sealing performance of the bypass valve assembly, but also help to reduce the impact noise on the valve housing when the valve body is closed.

[0030] Furthermore, another embodiment of the present invention provides a bypass valve assembly for a two-stage supercharger of an engine, wherein the valve housing assembly further comprises a shaft sleeve, the shaft sleeve is interference-pressed into the valve housing, and the other end of the valve stem is rotatably connected to the shaft sleeve with clearance; wherein

[0031] The actuator drives the other end of the valve stem to rotate around the inner wall surface of the sleeve through the rocker arm assembly.

[0032] By adopting the above technical solution, the other end of the valve stem is rotatably connected to the sleeve with a gap. In this way, on the one hand, the sleeve can effectively position the other end of the valve stem, and on the other hand, the gap between the sleeve and the valve stem can prevent the valve stem from getting stuck during rotation.

[0033] Furthermore, another embodiment of the present invention provides a bypass valve assembly for a two-stage supercharger of an engine, wherein the valve body assembly also includes a second sealing ring, which is sleeved on the valve stem and pressed and sealed between the inner wall surface of the sleeve and the outer wall surface of the valve stem.

[0034] By adopting the above technical solution, the second sealing ring in this embodiment is arranged between the shaft sleeve and the wall surface of the other end of the valve stem. Through the arrangement of this structure, the high-pressure gas inside the bypass valve assembly can be effectively prevented from leaking out.

[0035] Furthermore, another embodiment of the present invention provides a bypass valve assembly for a two-stage supercharger of an engine.

[0036] The valve housing assembly also includes a locating pin, which is clamped at the connection between the sleeve and the valve housing to limit the movement of the sleeve relative to the valve housing; the rocker arm assembly includes a rocker arm and a rocker arm pin, the other end of the valve stem is fixedly connected to one end of the rocker arm by riveting, and the rocker arm pin is transmission-connected to the power output end of the actuator.

[0037] With the above technical solution, in this embodiment, a positioning pin is provided at the connection between the bushing and the valve housing. The positioning pin can limit the bushing, thereby being able to restrict the axial or radial movement of the bushing relative to the valve housing.

[0038] Furthermore, another embodiment of the present invention provides a bypass valve assembly for an engine two-stage supercharger, wherein the bushing and the valve body are made of synthetic resin;

[0039] When the valve body assembly includes a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring are made of rubber material.

[0040] With the above technical solution, both synthetic resin and rubber material are non-metallic materials and have the advantage of light weight. Through the setting of this structure in this embodiment, the weight of the bypass valve assembly can be further reduced.

[0041] In addition, synthetic resin and rubber material have good wear resistance, and can further improve the anti-wear ability of the bushing, valve body, first sealing ring and second sealing ring in this embodiment.

[0042] Furthermore, another embodiment of the present invention provides a bypass valve assembly for an engine two-stage supercharger,

[0043] The synthetic resin includes polyphenylene sulfide, polytetrafluoroethylene, glass fiber and additives; wherein,

[0044] The content of the polyphenylene sulfide is 27-50WT%;

[0045] The content of the polytetrafluoroethylene is 25-35WT%;

[0046] The content of the glass fiber is 25-31WT%;

[0047] The first sealing ring and the second sealing ring are made of fluororubber.

[0048] Furthermore, another embodiment of the present invention provides an engine, including an engine body and a bypass valve assembly with the above structure; the bypass air outlet of the valve housing and the supercharged air outlet converge at the outlet housing assembly and are communicated with the air inlet of the engine body.

[0049] With the above technical solution, the engine in this embodiment adopts a bypass valve assembly with the above structure. Since the bypass valve assembly with the above structure has the advantages of good sealing performance, light weight, good anti-wear ability and low noise. Therefore, the working performance of the engine intake system in this embodiment can be further improved. Description of the Drawings

[0050] Figure 1aSchematic diagram of the composition of a two-stage supercharging system of an engine in the background art;

[0051] Figure 1b Schematic diagram of the composition of another two-stage supercharging system of an engine in the background art;

[0052] Figure 2 Partial cross-sectional structural diagram of the valve body assembly provided in Embodiment 1 of the present invention;

[0053] Figure 3 Cross-sectional structural diagram of the valve body and the riveting pin in the valve body assembly provided in Embodiment 1 of the present invention;

[0054] Figure 4 Cross-sectional structural diagram of the riveting pin in the valve body assembly provided in Embodiment 1 of the present invention;

[0055] Figure 5 Cross-sectional structural diagram of the valve body in the valve body assembly provided in Embodiment 1 of the present invention;

[0056] Figure 6 Cross-sectional structural diagram of the valve seat sleeve in the bypass valve assembly provided in Embodiment 2 of the present invention;

[0057] Figure 7 Structural diagram of one perspective of the bypass valve assembly provided in Embodiment 2 of the present invention;

[0058] Figure 8 Structural diagram of another perspective of the bypass valve assembly provided in Embodiment 2 of the present invention;

[0059] Figure 9 Structural diagram of yet another perspective of the bypass valve assembly provided in Embodiment 2 of the present invention (after removing the outlet housing assembly);

[0060] Figure 10 Structural diagram of the valve housing assembly in the bypass valve assembly provided in Embodiment 2 of the present invention;

[0061] Figure 11 Partial cross-sectional structural diagram of the bypass valve assembly provided in Embodiment 2 of the present invention;

[0062] Figure 12 Exploded structural diagram of the bypass valve assembly provided in Embodiment 2 of the present invention;

[0063] Figure 13 Structural diagram of the outlet housing assembly in the bypass valve assembly provided in Embodiment 2 of the present invention.

[0064] Explanation of reference numerals:

[0065] Explanation of reference numerals in the background art drawings:

[0066] CAC: intercooler; C: compressor; T: turbine; M: motor.

[0067] Description of the accompanying drawings of the present invention:

[0068] 10: Bypass valve assembly;

[0069] 100: valve body assembly;

[0070] 110: valve body; 11A: connecting hole;

[0071] 111: cavity; 1130: restricted portion;

[0072] 120: valve stem;

[0073] 130: Riveting pin;

[0074] 131: vent hole; 132: ring groove; 133: limit clamp; 134: side hole;

[0075] 1331: limit part;

[0076] 140: Washer;

[0077] 150: first sealing ring;

[0078] 160: second sealing ring;

[0079] 200: valve housing assembly;

[0080] 210: valve housing;

[0081] 211: bypass channel; 212: boost channel; 213: air inlet; 214: bypass outlet; 215: boost outlet

[0082] Air port; 216: mounting slot;

[0083] 220: valve seat sleeve;

[0084] 221: Positioning ring; 222: Sharp corner sealing ring;

[0085] 230: bushing;

[0086] 240: positioning pin;

[0087] 300: rocker arm assembly;

[0088] 310: rocker arm; 320: rocker arm pin;

[0089] 400: actuator;

[0090] 500: outlet housing assembly;

[0091] 510: Main air outlet; 520: Valve chamber; 530: Gasket; 540: Bolt. Detailed implementation mode

[0092] The following specific embodiments illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in combination with preferred embodiments, this does not mean that the features of this invention are limited to this implementation mode. On the contrary, the purpose of introducing the invention in combination with the implementation mode is to cover other alternatives or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, many specific details will be included in the following description. The present invention can also be implemented without using these details. In addition, in order to avoid confusing or obscuring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0093] It should be noted that in this specification, similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0094] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts belong to the scope of protection of the present invention.

[0095] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0096] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0097] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will further describe in detail the embodiments of the present invention with reference to the accompanying drawings.

[0098] Example 1:

[0099] As Figure 2 shown, an embodiment of the present invention provides a valve body assembly 100 of an engine supercharger bypass valve, including a valve body 110 and a valve stem 120. One end of the valve stem 120 is connected to the valve body 110; the valve body assembly 100 further includes a riveting pin 130 for connecting the valve body 110 and the valve stem 120.

[0100] Specifically, in this embodiment, corresponding connection holes 11A are provided on both the valve body 110 and the valve stem 120. One end of the riveting pin 130 passes through the connection hole 11A from one side of the valve body 110 and extends to the side of the valve stem 120 away from the valve body 110 and is fixed to the valve stem 120 to relatively fix the valve body 110 and the valve stem 120, and the outer wall surface of the riveting pin 130 is in clearance fit with the inner wall surface of the connection hole 11A of the valve body 110.

[0101] Further, as Figures 2 - 5 shown, a plurality of cavities 111 are circumferentially spaced along the inner wall surface of the connection hole 11A of the valve body 110. A vent hole 131 is provided at one end of the riveting pin 130 close to the valve body 110, and the vent hole 131 is respectively communicated with each cavity 111.

[0102] Specifically, in this embodiment of the valve body assembly 100, since the valve body 110 and the valve stem 120 are connected by the riveting pin 130, and the outer wall surface of the riveting pin 130 is in clearance fit with the inner wall surface of the connection hole 11A of the valve body 110, a plurality of cavities 111 are circumferentially spaced along the inner wall surface of the connection hole 11A of the valve body 110, and a vent hole 131 is provided at one end of the riveting pin 130 close to the valve body 110, and the vent hole 131 is respectively communicated with each cavity 111. With this structural arrangement, when the valve body assembly 100 is working, gas can enter the plurality of cavities 111 from the vent hole 131 and flow into the gap between the outer wall surface of the riveting pin 130 and the inner wall surface of the connection hole 11A, thereby enabling gas lubrication of the riveting pin 130 and the valve body 110, reducing the noise caused by the collision and friction between the valve body 110 and the riveting pin 130, and reducing the wear of the valve body 110.

[0103] More specifically, in this embodiment, the number of cavities 111 can be set to any number such as 2, 3, 4, etc., which is specifically determined according to actual design and usage requirements, and this embodiment does not limit this.

[0104] It should be understood that in this embodiment, preferably, three cavities 111 are provided, and the structure of the vent holes 131 matches the structure of the cavities 111. The gas with a certain pressure flowing into the vent holes 131 of the riveting pin 130 is stored in the cavities 111 and convectively diffuses into the gap between the valve body 110 and the riveting pin 130, so that the gap between the two is often in a "gas" lubrication state to avoid noise and wear caused by jamming and collision.

[0105] Furthermore, as Figure 3 shown, another embodiment of this embodiment provides a valve body assembly 100 of an engine supercharger bypass valve. A plurality of side holes 134 corresponding to the cavities 111 are provided on the peripheral wall of the riveting pin 130, and the vent holes 131 are respectively communicated with the respective cavities 111 through the corresponding side holes 134.

[0106] Specifically, in this embodiment, by providing a plurality of side holes 134 corresponding to the cavities 111 on the peripheral wall of the riveting pin 130, when the valve body assembly 100 is working, the gas can enter the vent holes 131 and enter the plurality of cavities 111 through the side holes 134, and flow into the gap between the outer wall surface of the riveting pin 130 and the inner wall surface of the connection hole 11A, so as to gas-lubricate the riveting pin 130 and the valve body 110.

[0107] More specifically, in this embodiment, the structure and the number of the side holes 134 only need to correspond to the cavities 111, and this embodiment does not make excessive limitations on this.

[0108] Furthermore, another embodiment of this embodiment provides a valve body assembly 100 of an engine supercharger bypass valve. The valve body assembly 100 further includes a washer 140. The washer 140 is detachably connected to one end of the riveting pin 130 away from the valve body 110 to clamp the valve stem 120 between the washer 140 and the valve body 110.

[0109] Specifically, in this embodiment, the valve body 110 and the valve stem 120 can be riveted together through the washer 140 and the riveting pin 130, and the disassembly is more convenient.

[0110] More specifically, in this embodiment, both the washer 140 and the valve stem 120 can be made of metal materials.

[0111] Furthermore, as Figures 2 - 4 shown, another embodiment of this embodiment provides a valve body assembly 100 of an engine supercharger bypass valve. The valve body assembly 100 further includes a first sealing ring 150, and an annular groove 132 is provided on the outer wall of the riveting pin 130 on the side of the cavity 111 close to the valve stem 120.

[0112] Specifically, in the present embodiment, the first sealing ring 150 is clamped in the annular groove 132 and is pressed and sealingly connected between the outer wall surface of the riveting pin 130 and the inner wall surface of the connection hole 11A of the valve body 110.

[0113] More specifically, in the present embodiment, the first sealing ring 150 can seal between the outer wall surface of the riveting pin 130 and the inner wall surface of the connection hole 11A of the valve body 110, thereby improving the sealing performance of the valve body assembly 100.

[0114] More specifically, the first sealing ring 150 can be an O-ring made of rubber material. Of course, it can also be a sealing ring with other structures, which can be specifically set according to actual design and use requirements, and the present embodiment does not limit this.

[0115] Further, another embodiment of the present embodiment provides a valve body assembly 100 of an engine supercharger bypass valve. The riveting pin 130 is provided with a three-stage stepped shaft structure, and the shaft diameter of the riveting pin 130 gradually decreases from the valve body 110 to the side of the valve stem 120 away from the valve body 110; and a limiting clamping table 133 is provided at one end of the riveting pin 130 close to the valve body 110, and the side surface of the limiting clamping table 133 close to the valve body 110 is in clearance fit with the wall surface of the valve body 110.

[0116] Specifically, as Figure 12 shown, a limiting portion 1331 is provided on the limiting clamping table 133, and a limited portion 1130 is provided at a position on the valve body 110 corresponding to the limiting portion 1331. The limiting portion 1331 and the limited portion 1130 are clamped to limit the rotation of the riveting pin 130 relative to the valve body 110 around the axis direction of the connection hole 11A.

[0117] More specifically, in the present embodiment, the riveting pin 130 is provided with a three-stage stepped shaft structure, a limiting portion 1331 is provided on the limiting clamping table 133, and a limited portion 1130 is provided at a position on the valve body 110 corresponding to the limiting portion 1331. Through this structural setting, the riveting pin 130 can better limit the valve stem 120 and the valve body 110, and can ensure the butt joint of the cavity 111 and the side hole 134.

[0118] More specifically, in the present embodiment, one of the limiting portion 1331 and the limited portion 1130 can be set as an anti-rotation convex block, and the other can be set as an anti-rotation groove. That is to say, the limiting portion 1331 can be set as an anti-rotation convex block, and the limited portion 1130 can be set as an anti-rotation groove; or the limiting portion 1331 can be set as an anti-rotation groove, and the limited portion 1130 can be set as an anti-rotation convex block. Of course, it can also be set as other structures. It can be specifically set according to actual design and use requirements, and the present embodiment does not limit this.

[0119] During the assembly process, the first sealing ring 150, the valve body 110 and the valve stem 120 are assembled on the rivet pin 130 in sequence. The washer 140 rivets the valve stem 120 and the rivet pin 130 into one piece. After installation, the valve body 110 has a certain axial and radial clearance on the rivet pin 130, which can provide a certain degree of fine-tuning of the relative position of the two to improve the flexibility of the bypass valve when closing. The valve stem 120 has no axial clearance on the rivet pin 130, that is, it is pressed against the rivet pin 130 by the washer 140.

[0120] This embodiment provides a valve body assembly 100 of an engine supercharger bypass valve, such as Figures 2 - 5 As shown, the valve body assembly 100 includes a valve body 110 and a valve stem 120, one end of which is connected to the valve body 110. The valve body assembly 100 also includes a rivet pin 130 for connecting the valve body 110 and the valve stem 120. The valve body 110 and the valve stem 120 are both provided with corresponding connection holes 11A. One end of the rivet pin 130 passes through the connection hole 11A from one side of the valve body 110 and extends to the side of the valve stem 120 away from the valve body 110, and is fixed to the valve stem 120 to fix the valve body 110 and the valve stem 120 relative to each other. The outer wall surface of the rivet pin 130 is loosely matched with the inner wall surface of the connection hole 11A of the valve body 110. The connection hole 11A of the valve body 110 is provided with a plurality of cavities 111 at intervals along its inner wall surface. The end of the rivet pin 130 close to the valve body 110 is provided with a vent hole 131, which is respectively connected to each cavity 111. This structural arrangement allows the gas with a certain pressure flowing into the vent hole 131 of the rivet pin 130 to be stored in the cavity 111 and diffused toward the gap between the valve body 110 and the rivet pin 130 , so that the gap between the two is always in a "gas" lubricated state to avoid noise and wear caused by jamming and collision.

[0121] Example 2:

[0122] One implementation of this embodiment provides a bypass valve assembly 10 for a two-stage supercharger of an engine, such as Figures 6 - 13 As shown, it includes a valve housing assembly 200, a rocker arm assembly 300, an actuator 400, an outlet housing assembly 500 and the valve body assembly 100 in embodiment 1.

[0123] Specifically, in this embodiment, the valve body assembly 100 is installed at the position of the bypass outlet 214 of the valve housing assembly 200, the rocker arm assembly 300 and the actuator 400 are installed on the valve housing assembly 200, the outlet housing assembly 500 is arranged on one side of the valve housing assembly 200, and the other end of the valve stem 120 in the valve body assembly 100 is transmission-connected to the actuator 400 through the rocker arm assembly 300. The action of the actuator 400 drives the valve stem 120 through the rocker arm assembly 300 and links the valve body 110 to switch between the open state and the closed state.

[0124] More specifically, in this embodiment, since the bypass valve assembly 10 in this embodiment includes the valve body assembly 100 in Embodiment 1, and in the valve body assembly 100 in Embodiment 1, the valve body 110 and the valve stem 120 are connected by a riveting pin 130, and the outer wall surface of the riveting pin 130 is in clearance fit with the inner wall surface of the connection hole 11A of the valve body 110. A plurality of cavities 111 are provided at intervals along the circumferential direction of the inner wall surface of the connection hole 11A of the valve body 110. One end of the riveting pin 130 close to the valve body 110 is provided with a ventilation hole 131, and the ventilation hole 131 is respectively communicated with each cavity 111. Through this structural arrangement, when the valve body assembly 100 is working, gas can enter the plurality of cavities 111 from the ventilation hole 131 and flow into the gap between the outer wall surface of the riveting pin 130 and the inner wall surface of the connection hole 11A, so as to gas-lubricate the riveting pin 130 and the valve body 110, reduce the noise caused by the collision and friction between the valve body 110 and the riveting pin 130, and reduce the wear of the valve body 110. In this way, the noise of the bypass valve assembly 10 can be effectively reduced.

[0125] It should be understood that the structure of the actuator 400 is similar to the existing actuator structure and can be electric or pneumatic. The specific structures of the valve housing assembly 200 and the rocker arm assembly 300 will be explained in detail below and will not be elaborated here.

[0126] Furthermore, as Figures 9 - 13 shown, another embodiment of this embodiment provides a bypass valve assembly 10 for an engine two-stage supercharger. The valve housing assembly 200 includes a valve housing 210. The valve housing 210 has a bypass passage 211, a supercharging passage 212, a bypass air outlet 214 and a supercharging air outlet 215 provided on one side. The bypass air outlet 214 and the supercharging air outlet 215 converge at the outlet housing assembly 500 and are then communicated with the intake port of the engine.

[0127] Specifically, in this embodiment, one end of the bypass passage 211 is communicated with the low-pressure stage supercharger of the two-stage supercharger, and the other end is communicated with the bypass air outlet 214. One end of the supercharging passage 212 is communicated with the low-pressure stage supercharger of the two-stage supercharger, and the other end is communicated with the supercharging air outlet 215.

[0128] More specifically, the supercharging passage 212 is arranged inside the compressor housing of the high-pressure stage supercharger and becomes a part of the high-pressure stage supercharger. Its compressor impeller (not shown) is located between the air inlet 213 and the supercharging air outlet 215 of the supercharging passage 212.

[0129] Furthermore, another embodiment of this embodiment provides a bypass valve assembly 10 for an engine two-stage supercharger, as Figure 6As shown, the valve housing assembly 200 further includes a valve seat sleeve 220. An installation groove 216 is provided at a position on the outer peripheral edge of the valve housing 210 where the bypass air outlet 214 is located.

[0130] Furthermore, a positioning ring 221 is provided on one side surface of the valve seat sleeve 220, and a sharp-corner sealing ring 222 is provided on the other side surface.

[0131] Specifically, in this embodiment, the positioning ring 221 on the valve seat sleeve 220 is clamped in the installation groove 216, and the connection between the positioning ring 221 and the installation groove 216 is sealed; when the valve body 110 is in the closed state, one side wall surface of the valve body 110 abuts against and is sealingly connected to the sharp-corner sealing ring 222.

[0132] More specifically, in this embodiment, the valve seat sleeve 220 can be arranged between the valve body 110 and the valve housing 210. A positioning ring 221 is provided on one side surface of the valve seat sleeve 220, and a sharp-corner sealing ring 222 is provided on the other side surface. By setting this structure, the sealing performance of the bypass valve assembly 10 can be improved, and it is also beneficial to reduce the impact noise when the valve body 110 closes on the valve housing 210.

[0133] Further, as Figures 11 - 13 shown, another embodiment of this embodiment provides a bypass valve assembly 10 for an engine two-stage supercharger. The valve housing assembly 200 further includes a bushing 230. The bushing 230 is press-fitted into the valve housing 210 with interference, and the other end of the valve stem 120 is rotatably connected to the inside of the bushing 230 with a clearance.

[0134] Specifically, in this embodiment, when the actuator 400 operates, it drives the other end of the valve stem 120 to rotate around the inner wall surface of the bushing 230 through the rocker arm assembly 300.

[0135] More specifically, in this embodiment, the other end of the valve stem 120 is rotatably connected to the inside of the bushing 230 with a clearance. In this way, on the one hand, the bushing 230 can effectively position the other end of the valve stem 120, and on the other hand, the clearance between the bushing 230 and the valve stem 120 can prevent the valve stem 120 from jamming during rotation.

[0136] Further, another embodiment of this embodiment provides a bypass valve assembly 10 for an engine two-stage supercharger. As Figure 11 shown, the valve body assembly 100 further includes a second sealing ring 160. The second sealing ring 160 is sleeved on the valve stem 120 and is pressed and sealingly connected between the inner wall surface of the bushing 230 and the outer wall surface of the valve stem 120.

[0137] Specifically, the second sealing ring 160 in this embodiment is disposed between the shaft sleeve 230 and the wall surface of the other end of the valve stem 120. This structural arrangement can effectively prevent the high-pressure gas inside the bypass valve assembly 10 from leaking out.

[0138] More specifically, the second sealing ring 160 can be an O-ring made of rubber material. Of course, it can also be a sealing ring with other structures, which can be set according to actual design and use requirements, and this embodiment does not limit this.

[0139] Furthermore, another embodiment of this embodiment provides a bypass valve assembly 10 of a two-stage supercharger of an engine, such as Figure 11 As shown, the valve housing assembly 200 also includes a locating pin 240, which is clamped at the connection between the sleeve 230 and the valve housing 210 to limit the movement of the sleeve 230 relative to the valve housing 210; the rocker arm assembly 300 includes a rocker arm 310 and a rocker arm pin 320, and the other end of the valve stem 120 is fixedly connected to one end of the rocker arm 310 by riveting, and the rocker arm pin 320 is transmission-connected to the power output end of the actuator 400.

[0140] Specifically, in this embodiment, a positioning pin 240 is provided at the connection between the shaft sleeve 230 and the valve housing 210 . The positioning pin 240 can limit the shaft sleeve 230 , thereby limiting the axial or radial movement of the shaft sleeve 230 relative to the valve housing 210 .

[0141] Furthermore, if Figures 6 - 13 As shown, another embodiment of this embodiment provides a bypass valve assembly 10 for a two-stage supercharger of an engine, wherein the sleeve 230 and the valve body 110 are made of synthetic resin, and the first sealing ring 150 and the second sealing ring 160 are made of rubber.

[0142] Specifically, both synthetic resin and rubber are non-metallic materials and have the advantage of being lightweight. This embodiment can further reduce the weight of the bypass valve assembly 10 through the arrangement of such a structure.

[0143] More specifically, synthetic resin and rubber materials have good wear resistance, which can further improve the wear resistance of the sleeve 230, the valve body 110, the first sealing ring 150 and the second sealing ring 160 in this embodiment.

[0144] Furthermore, another implementation of this embodiment provides a bypass valve assembly 10 for a two-stage supercharger of an engine, wherein the synthetic resin includes polyphenylene sulfide, polytetrafluoroethylene, glass fiber, and additives.

[0145] Specifically, the content of polyphenylene sulfide is 27 to 50 wt%;

[0146] The content of polytetrafluoroethylene is 25-35 wt%;

[0147] The content of the glass fiber is 25 to 31WT%.

[0148] The first sealing ring 150 and the second sealing ring 160 are made of high-temperature-resistant fluororubber.

[0149] More specifically, in this embodiment, the content of polyphenylene sulfide can be set to 35WT%, the content of polytetrafluoroethylene is 30WT%, the content of glass fiber is 28WT%, and the density is set to 1.79 kg / dm 3 . Of course, other specific gravities can also be used, which can be specifically set according to actual design and usage requirements, and this embodiment does not limit this.

[0150] More specifically, in this embodiment, the bushing 230, the valve body 110, the first sealing ring 150, and the second sealing ring 160 are set in this structure, which can meet the requirements of continuous working temperature of -40°C to 200°C, corrosion resistance, and wear reduction, etc. In addition, the first sealing ring 150 and the second sealing ring 160 also have good sealing performance and noise reduction and oil resistance capabilities.

[0151] During the use of the bypass valve assembly 10 provided in this embodiment, the push rod at the end of the actuator 400 controls the rocker pin 320 to rotate along the rotation center axis A-A of the valve body assembly 100 through reciprocating linear push and pull movement, and then drives the valve body assembly 100 to rotate to achieve the purpose of opening and closing the bypass flow channel. Among them, as Figure 10 shown, the gas after being compressed by the low-pressure stage supercharger flows into the valve housing 210 from the air inlet 213 and is divided into two paths shown by the dotted lines in the figure. One path is further compressed along the supercharging channel 212 and flows out from the outlet of the high-pressure stage compressor; the other path "is short-circuited" along the bypass channel 211 to reach the bypass air outlet 214.

[0152] Specifically, when the bypass air outlet 214 is opened, the valve seat sleeve 220 and the valve body 110 do not fit together, and the intake air will be partially or completely bypassed. At this time, the system is in a partial two-stage supercharging or completely single-stage supercharging working state; when the bypass air outlet 214 is closed, the valve seat sleeve 220 and the valve body 110 fit together, and the intake air will all pass through the high-pressure stage compressor and be further compressed. At this time, the supercharging system is in a completely two-stage supercharging working state.

[0153] Example 3:

[0154] This embodiment provides an engine, including an engine body and the bypass valve assembly 10 in Embodiment 2; please refer to Figures 2 - 5 in Embodiment 1 and Figures 6 - 13, the bypass air outlet 214 and the supercharging air outlet 215 of the valve housing 210 converge at the outlet housing assembly 500 and then communicate with the air inlet of the engine body. One end of the outlet housing assembly 500 is integrally installed with the valve housing assembly 200 through a gasket 530 and bolts 540. A valve cavity 520 is left inside as a space for the valve body assembly 100 to work and for the air flow to converge. The total air outlet 510 at the other end serves as the connection port to the engine's intake system.

[0155] Specifically, the engine in this embodiment adopts the bypass valve assembly 10 in Embodiment 2. Since the valve body 110 and the valve stem 120 in the bypass valve assembly 10 in Embodiment 2 are connected by a riveting pin 130, the outer wall surface of the riveting pin 130 is in clearance fit with the inner wall surface of the connection hole 11A of the valve body 110. A plurality of cavities 111 are arranged at intervals along the circumferential direction of the inner wall surface of the connection hole 11A of the valve body 110. A ventilation hole 131 is provided at one end of the riveting pin 130 close to the valve body 110, and the ventilation hole 131 communicates with each cavity 111 respectively. Through this structural arrangement, when the valve body assembly 100 is working, gas can enter the plurality of cavities 111 from the ventilation hole 131 and flow into the gap between the outer wall surface of the riveting pin 130 and the inner wall surface of the connection hole 11A. Thus, gas lubrication can be carried out on the riveting pin 130 and the valve body 110, the noise caused by the collision and friction between the valve body 110 and the riveting pin 130 can be reduced, and the wear of the valve body 110 can be decreased. It has the advantages of good sealing performance, light weight, good anti-wear ability and low noise. Therefore, the working performance of the engine intake system in this embodiment is further improved.

[0156] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A valve body assembly of an engine supercharger bypass valve, comprising a valve body and a valve stem, one end of the valve stem is connected to the valve body; characterized in that, The valve body assembly further includes a rivet pin for connecting the valve body and the valve stem; wherein, The valve body and the valve stem are both provided with corresponding connecting holes, one end of the rivet pin passes through the connecting hole from one side of the valve body and extends to the side of the valve stem away from the valve body, and is fixed to the valve stem to relatively fix the valve body and the valve stem, and the outer wall surface of the rivet pin is loosely matched with the inner wall surface of the connecting hole of the valve body; and, The connecting hole of the valve body is provided with a plurality of cavities at intervals along the circumferential direction of the inner wall surface thereof, and an air vent is provided at one end of the rivet pin close to the valve body, and the air vent is communicated with each of the cavities respectively.

2. The valve body assembly of the engine supercharger bypass valve according to claim 1, characterized in that, A plurality of side holes corresponding to the cavities are provided on the peripheral wall of the riveting pin, and the vent holes are communicated with each of the cavities through the corresponding side holes.

3. The valve body assembly of the engine supercharger bypass valve according to claim 1, characterized in that, The valve body assembly further includes a washer which is detachably connected to an end of the rivet pin away from the valve body so as to clamp the valve stem between the washer and the valve body.

4. The valve body assembly of the engine supercharger bypass valve according to claim 1, characterized in that, The valve body assembly further includes a first sealing ring, and an annular groove is provided on the outer wall of the rivet pin, located on the side of the cavity close to the valve stem; wherein, The first sealing ring is clamped in the annular groove and is pressed and sealed between the outer wall surface of the rivet pin and the inner wall surface of the connecting hole of the valve body.

5. The valve body assembly of the engine supercharger bypass valve according to any one of claims 1-4, characterized in that, The rivet pin is configured as a three-step shaft structure, and the shaft diameter of the rivet pin decreases sequentially from the valve body to the side of the valve stem away from the valve body; and a limit clamp is provided at one end of the rivet pin close to the valve body, and a side surface of the limit clamp close to the valve body is in clearance with the wall surface of the valve body, wherein: A limiting portion is provided on the limiting clamping platform, and a limited portion is provided on the valve body at a position corresponding to the limiting portion. The limiting portion is clamped with the limited portion to limit the rotation of the rivet pin relative to the valve body in the axial direction around the connecting hole.

6. A bypass valve assembly for a two-stage supercharger of an engine, comprising a valve housing assembly, a rocker arm assembly, an actuator and an outlet housing assembly; characterized in that, The bypass valve assembly further comprises a valve body assembly according to any one of claims 1 to 5; wherein, The valve body assembly is installed at the bypass outlet position of the valve housing assembly, the rocker arm assembly and the actuator are installed on the valve housing assembly, the outlet housing assembly is arranged on one side of the valve housing assembly, and the other end of the valve stem in the valve body assembly is transmission-connected to the actuator through the rocker arm assembly. The actuator action drives the valve stem through the rocker arm assembly and links the valve body to switch between an open state and a closed state.

7. The bypass valve assembly of the engine two-stage supercharger according to claim 6, characterized in that, The valve housing assembly includes a valve housing having a bypass flow channel, a boost channel, and the bypass air outlet and the boost air outlet arranged on one side, wherein the bypass air outlet and the boost air outlet are connected to the air intake of the engine through the outlet housing assembly; wherein, One end of the bypass channel is connected to the low-pressure stage supercharger of the two-stage supercharger, and the other end is connected to the bypass air outlet. One end of the boost channel is connected to the low-pressure stage supercharger of the two-stage supercharger, and the other end is connected to the boost air outlet.

8. The bypass valve assembly of the engine two-stage supercharger according to claim 7, characterized in that, The valve housing assembly further includes a valve seat sleeve. An installation groove is provided at a position on the outer peripheral edge of the valve housing where the bypass air outlet is located; and, A positioning ring is provided on one side surface of the valve seat sleeve, and a sharp-corner sealing ring is provided on the other side surface; wherein The positioning ring on the valve seat sleeve is clamped in the installation groove, and the connection between the positioning ring and the installation groove is sealed; when the valve body is in the closed state, one side wall surface of the valve body abuts against and is sealingly connected to the sharp-corner sealing ring.

9. The bypass valve assembly of the two-stage supercharger of the engine according to claim 7, characterized in that, The valve housing assembly further includes a bushing. The bushing is press-fitted into the valve housing with an interference fit, and the other end of the valve stem is rotatably connected to the inside of the bushing with a clearance, wherein The actuator acts to drive the other end of the valve stem to rotate around the inner wall surface of the bushing through the rocker arm assembly.

10. The bypass valve assembly of the engine two-stage supercharger according to claim 9, characterized in that, The valve body assembly further includes a second sealing ring. The second sealing ring is sleeved on the valve stem and is pressed and sealingly connected between the inner wall surface of the bushing and the outer wall surface of the valve stem.

11. The bypass valve assembly of the engine two-stage supercharger according to claim 10, wherein, The valve housing assembly further includes a positioning pin. The positioning pin is clamped at the connection between the bushing and the valve housing to limit the movement of the bushing relative to the valve housing; the rocker arm assembly includes a rocker arm and a rocker arm pin. The other end of the valve stem is fixedly connected to one end of the rocker arm by riveting, and the rocker arm pin is drivingly connected to the power output end of the actuator.

12. The bypass valve assembly of the engine two-stage supercharger according to claim 11, characterized in that, The bushing and the valve body are made of synthetic resin; When the valve body assembly includes a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring are made of rubber material.

13. The bypass valve assembly of the engine two-stage supercharger according to claim 12, wherein, The synthetic resin includes polyphenylene sulfide, polytetrafluoroethylene, glass fiber and additives; wherein, The content of the polyphenylene sulfide is 27-50WT%; The content of the polytetrafluoroethylene is 25-35WT%; The content of the glass fiber is 25-31WT%; The first sealing ring and the second sealing ring are made of fluororubber.

14. An engine, comprising an engine body; characterized in that, It further includes the bypass valve assembly according to any one of claims 7-13; the bypass air outlet and the supercharged air outlet of the valve housing converge at the outlet cover assembly and are communicated with the air inlet of the engine body.

Images