Low emission internal combustion engine tailpipe bypass valve structure

Abstract

The utility model relates to the technical field of automobile bypass valve, specifically is a kind of low emission internal combustion engine exhaust bypass valve structure, including actuator, the actuator includes two detachable fixed housings, two The diaphragm is fixed between the housing, the diaphragm bottom is fixed with support cover, the support cover is fixed with reset spring between corresponding position housing, the bottom surface fixedly connected of support cover has valve stem, the valve stem is slidably connected with housing, the bottom of the valve stem is provided with thread, the valve stem is internally provided with vent hole groove. In the utility model, by setting vent hole groove in the inside of traditional valve stem, when moving the valve stem by moving diaphragm, the air below diaphragm can flow into vent hole groove through round hole one, then be discharged to outside from exhaust pipe, the vent hole groove is set in the inside of traditional valve stem, and the air below diaphragm can flow into vent hole groove through round hole one when moving the valve stem by moving diaphragm, then be discharged to outside from exhaust pipe, spare larger size rod hole in the sliding position of valve stem and housing is set to ventilate, it is helpful to the stable elongation of valve stem on housing.

Description

Technical Field

[0001] This utility model relates to the field of automotive bypass valve technology, specifically a structure for a low-emission internal combustion engine exhaust bypass valve. Background Technology

[0002] Automotive bypass valves optimize the operating conditions of internal combustion engines by regulating exhaust gas flow, reducing incomplete combustion, and thus achieving low exhaust emissions. The bypass valve mainly consists of an actuator, a valve stem, and a valve plate. When the intake side air pressure of the turbine is high, the air pressure drives the valve actuator to extend the valve stem, which in turn pushes the valve plate to open, allowing some exhaust gas inside the turbine to be discharged directly without passing through the turbine. This helps to reduce the turbine speed and decrease the intake air volume on the turbine's intake side, thereby reducing the air pressure entering the internal combustion engine.

[0003] The extension of the valve stem is achieved by the diaphragm inside the actuator pushing the valve stem downward. To prevent the air pressure below the diaphragm from hindering its movement, most bypass valves have a space reserved between the valve stem and the stem hole for air to pass through below the diaphragm. However, the clearance between the valve stem and the stem hole is not conducive to the stable sliding of the valve stem on the actuator. In addition, the outer side of the valve stem is also provided with threads to facilitate the adjustment of the valve stem length. Most valve stem threads lack protective and lubrication structures. The valve stem threads are prone to corrosion if exposed for a long time, which affects the engagement and rotation of the valve stem to adjust the length of the actuator. Utility Model Content

[0004] The purpose of this invention is to provide a low-emission internal combustion engine exhaust bypass valve structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A low-emission internal combustion engine exhaust bypass valve structure includes:

[0007] An actuator comprising two spliced ​​and fixed housings, with a diaphragm installed between the two housings, a support cover fixed to the bottom surface of the diaphragm, and a return spring fixed between the support cover and the housing;

[0008] The valve stem is fixedly connected to the support cover and slidably connected to the housing. The bottom of the valve stem is threaded and the inside of the valve stem is vented. The top of the valve stem is a circular hole I and the middle of the valve stem is fixed with an exhaust pipe. Multiple circular holes II are evenly distributed at the threaded position of the valve stem. The circular holes I, the exhaust pipe and the circular holes II are all connected to the vented slot.

[0009] A sleeve is screwed into the valve stem, and a protective tube is slidably connected to the outside of the sleeve.

[0010] Furthermore, the vent slot is opened along the length of the valve stem, the circular hole is located inside the actuator, and a sealing plug is detachably installed on the outside of the exhaust pipe.

[0011] Furthermore, an air intake pipe is fixedly connected to the top of one of the housings, and two studs are fixed to the bottom surface of the other housing.

[0012] Furthermore, the outer side of the sleeve is provided with a slot, and the inner side of the protective tube is fixed with a locking block that is slidably connected to the slot.

[0013] Furthermore, one end of the protective tube is fixed with an annular rubber block, which is sleeved on the outside of the valve stem.

[0014] Furthermore, an annular plate is fixed to the outer side of the shell, an annular groove is formed on the outer side of the annular plate, and an annular block that engages with the annular groove is fixed to the outer side of the diaphragm.

[0015] Furthermore, a washer is arranged between the two annular plates, and multiple bolts are evenly fixed between the two annular plates.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] By creating a venting slot inside the valve stem, the top of the venting slot connects to the space below the diaphragm inside the actuator through a circular hole, and the middle of the venting slot connects to the outside through an exhaust pipe. When the air pressure on the turbine's intake side is high, airflow will enter the air above the diaphragm through the intake pipe. The diaphragm, through the support cover, moves the valve stem downward and elongates. At this time, the air in the space below the diaphragm can be released to the outside through the circular hole, the venting slot, and the exhaust pipe, effectively preventing the air pressure below the diaphragm from hindering the diaphragm's movement. This eliminates the need for the traditional method of creating a rod hole larger than the valve stem diameter at the sliding position between the valve stem and the housing to discharge the air below the diaphragm, and helps the actuator stably drive the valve stem to move on the housing.

[0018] A protective tube is slidably connected to the outside of the sleeve. The protective tube is sleeved on the outside of the valve stem thread position, effectively preventing dirt residue from remaining on the valve stem thread and protecting the valve stem thread position. When it is necessary to lubricate the thread position so that the valve stem can rotate smoothly in the sleeve, an appropriate amount of lubricating oil can be injected into the vent groove through the vent pipe. Then, the vent pipe is sealed with a sealing plug. Next, high-pressure air is pumped from the air inlet pipe to move the diaphragm down, so that the air under the diaphragm can be squeezed out through the round hole 1 into the vent groove. This helps to evenly discharge the lubricating oil inside the vent groove to the periphery of the thread through multiple round holes 2, which helps the user to lubricate the valve stem thread position in all directions. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the shell in this utility model;

[0021] Figure 3 This is a schematic diagram of the sleeve and valve stem structure in this utility model;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the sleeve and protective tube in this utility model when separated.

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the shell, gasket, and diaphragm in this utility model.

[0024] In the diagram: 100, Actuator; 110, Housing; 111, Inlet pipe; 112, Stud; 120, Diaphragm; 121, Support cover; 122, Annular block; 130, Return spring; 140, Annular plate; 141, Annular groove; 150, Washer; 160, Bolt; 200, Valve stem; 210, Hole 1; 220, Exhaust pipe; 221, Sealing plug; 230, Hole 2; 300, Sleeve; 310, Protective tube; 311, Annular rubber block; 312, Locking block; 320, Locking groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1, please refer to Figure 1 - Figure 5In this embodiment of the present invention, a low-emission internal combustion engine exhaust bypass valve structure includes an actuator 100. The actuator 100 includes two detachably fixed housings 110. A diaphragm 120 is installed and fixed between the two housings 110. A support cover 121 is fixed to the bottom surface of the diaphragm 120. A return spring 130 is fixed between the support cover 121 and the corresponding housing 110. A valve stem 200 is fixedly connected to the bottom surface of the support cover 121. The valve stem 200 is slidably connected to the housing 110. The bottom of the valve stem 200... The valve stem 200 has a thread, a vent groove inside, a round hole 210 on the outer side of the top of the valve stem 200, an exhaust pipe 220 fixed on the outer side of the middle part of the valve stem 200, and multiple round holes 230 evenly distributed on the outer side of the threaded position of the valve stem 200. The round hole 210, the exhaust pipe 220 and the round hole 230 are all connected to the vent groove. A sleeve 300 is screwed into the thread of the valve stem 200, and a protective tube 310 is slidably connected to the outer side of the sleeve 300, covering the outer side of the thread.

[0027] Specifically, by creating a vent slot inside the conventional valve stem 200, when the diaphragm 120 moves downwards, causing the valve stem 200 to move, the air below the diaphragm 120 can flow into the vent slot through the first round hole 210 and then be discharged to the outside through the exhaust pipe 220. This eliminates the need for a large-sized rod hole at the sliding position between the valve stem 200 and the housing 110 for ventilation, and helps the valve stem 200 to move stably on the housing 110. Multiple second round holes 23 are also provided at the bottom of the vent slot. Multiple round holes 230 are evenly distributed around the threaded position of the valve stem 200. When it is necessary to apply oil to the threaded position of the valve stem 200 for lubrication, lubricating oil is injected into the vent groove through the exhaust pipe 220. Then, the exhaust pipe 220 is blocked, and the bypass valve diaphragm 120 is moved down to squeeze the air below the diaphragm 120 of the actuator 100 through the round hole 210 into the vent groove. The air pressure pushes the lubricating oil, which helps the lubricating oil to spread evenly to the threaded position and facilitates the lubrication of the threaded position of the valve stem 200.

[0028] like Figure 2 and Figure 3 As shown, in this embodiment, the vent slot is opened along the length of the valve stem 200, and the circular hole 210 is located below the diaphragm 120 inside the actuator 100, so that the air below the diaphragm 120 inside the actuator 100 can be discharged to the outside through the circular hole 210, the vent slot and the exhaust pipe 220 in sequence when the diaphragm 120 moves down, preventing the air in the space below the diaphragm 120 from hindering its movement when the diaphragm 120 moves down.

[0029] like Figure 3As shown, in this embodiment, a sealing plug 221 is detachably installed and fixed on the outside of the exhaust pipe 220. During normal use, the bypass valve can remove the sealing plug 221 to facilitate the air in the vent groove to be discharged from below the diaphragm 120 through the exhaust pipe 220. When it is necessary to lubricate the threads of the valve stem 200, lubricating oil can be injected into the vent groove through the exhaust pipe 220 first, and then the sealing plug 221 can be covered. The movement of the diaphragm 120 of the bypass valve itself can be used to squeeze out the lubricating oil by air pressure, which helps the lubricating oil to be discharged from the round holes 230 at different positions.

[0030] like Figure 2 As shown, in this embodiment, an intake pipe 111 is fixedly connected to the top of a housing 110. The intake pipe 111 is connected to the intake side of the turbine through a hose. Two studs 112 are fixed to the bottom surface of another housing 110. The studs 112 facilitate the installation of a bypass valve onto the vehicle. The connection between the intake pipe 111 and the hose, as well as the installation of the studs 112 onto the vehicle, are all existing technologies, and the specific principles will not be elaborated.

[0031] like Figure 4 As shown, in this embodiment, a slot 320 is provided on the outer side of the sleeve 300, and a locking block 312 that is slidably connected to the slot 320 is fixed on the inner side of the protective tube 310, so that the protective tube 310 can slide along the sleeve 300 to different positions, so that the protective tube 310 can sleeve and protect the threaded position of the valve stem 200.

[0032] In this embodiment, an annular rubber block 311 is fixed to one end of the protective tube 310. The annular rubber block 311 is sleeved on the outside of the valve stem 200. The annular rubber block 311 can be tightly sleeved on the outside of the valve stem 200, effectively preventing the protective tube 310 from moving on its own outside the valve stem 200.

[0033] In Example 2, based on Example 1, in order to make the two housings 110 of the actuator 100 detachable and openable, so as to facilitate the replacement of damaged internal components of the actuator 100.

[0034] like Figure 2 and Figure 5 As shown, in this embodiment, an annular plate 140 is fixed on the outer side of the housing 110, an annular groove 141 is provided on the outer side of the annular plate 140, an annular block 122 is fixed on the outer side of the diaphragm 120 and engages with the annular groove 141, a washer 150 is arranged between the two annular plates 140, and a plurality of bolts 160 are evenly fixed between the two annular plates 140.

[0035] In this embodiment, when the actuator 100 needs to be opened, multiple bolts 160 can be loosened and removed, and then the two annular plates 140 can be separated to disassemble the two housings 110. This allows the internal components of the actuator 100 to be removed and replaced. Compared to most actuators 100 currently, where the two housings 110 are integrally formed, this avoids the situation where a component inside the actuator 100 needs to be replaced if it is damaged.

[0036] In this embodiment, combined with Figure 5 An annular block 122 is fixed to the outside of the diaphragm 120. When the diaphragm 120 is installed, the annular block 122 can be snapped into the annular groove 141 between the two annular plates 140, so that the two annular plates 140 can firmly clamp and fix the diaphragm 120. At the same time, a gasket 150 is arranged between the two annular plates 140 to help improve the sealing of the fixed position of the two annular plates 140.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A structure for a low-emission internal combustion engine exhaust bypass valve, characterized in that, include: The actuator (100) includes two spliced ​​and fixed housings (110), a diaphragm (120) is installed between the two housings (110), a support cover (121) is fixed on the bottom surface of the diaphragm (120), and a return spring (130) is fixed between the support cover (121) and the housing (110). The valve stem (200) is fixedly connected to the support cover (121), and the valve stem (200) is slidably connected to the housing (110). The bottom of the valve stem (200) is threaded, the inside of the valve stem (200) is provided with a venting groove, the top of the valve stem (200) is provided with a first round hole (210), the middle of the valve stem (200) is fixed with an exhaust pipe (220), and multiple second round holes (230) are evenly provided at the thread position of the valve stem (200). The first round hole (210), the exhaust pipe (220) and the second round hole (230) are all connected to the venting groove. The sleeve (300) is screwed into the valve stem (200), and a protective tube (310) is slidably connected to the outside of the sleeve (300).

2. The low-emission internal combustion engine exhaust bypass valve structure according to claim 1, characterized in that, The vent slot is opened along the length of the valve stem (200), the round hole (210) is located inside the actuator (100), and the outer side of the exhaust pipe (220) is detachably fitted with a sealing plug (221).

3. The low-emission internal combustion engine exhaust bypass valve structure according to claim 1, characterized in that, An air intake pipe (111) is fixed to the top of one housing (110), and two studs (112) are fixed to the bottom of the other housing (110).

4. The low-emission internal combustion engine exhaust bypass valve structure according to claim 1, characterized in that, A slot (320) is provided on the outer side of the sleeve (300), and a block (312) is fixed on the inner side of the protective tube (310) and is slidably connected to the slot (320).

5. The low-emission internal combustion engine exhaust bypass valve structure according to claim 4, characterized in that, One end of the protective tube (310) is fixed with an annular rubber block (311), which is sleeved on the outside of the valve stem (200).

6. The low-emission internal combustion engine exhaust bypass valve structure according to claim 1, characterized in that, An annular plate (140) is fixed on the outside of the shell (110), and an annular groove (141) is opened on the outside of the annular plate (140). An annular block (122) that engages with the annular groove (141) is fixed on the outside of the diaphragm (120).

7. The low-emission internal combustion engine exhaust bypass valve structure according to claim 6, characterized in that, A washer (150) is arranged between the two annular plates (140), and multiple bolts (160) are evenly fixed between the two annular plates (140).

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