EGR valve, engine and vehicle

Abstract

The present invention discloses an EGR valve, an engine, and a vehicle. The EGR valve includes a valve body having an exhaust gas passage. The inner wall of the exhaust gas passage is coated with a stainless steel layer, the stainless steel layer being formed into a bushing disposed within the exhaust gas passage. The valve body and bushing are formed into an integral part through a die-casting process, with the outer wall of the bushing conforming to the inner wall of the exhaust gas passage. According to the EGR valve of the present invention, the stainless steel layer coating the inner wall of the exhaust gas passage prevents exhaust gas entering the exhaust gas passage from directly contacting the inner wall of the exhaust gas passage, thereby preventing corrosion of the inner wall of the exhaust gas passage, thereby fundamentally resolving problems such as EGR valve sticking, abnormal noise, and liquid and gas leakage. Furthermore, the stainless steel layer is formed into a bushing disposed within the exhaust gas passage, adapting to the complex structure of the exhaust gas passage, ensuring a complete and tight fit between the stainless steel layer and the inner wall of the exhaust gas passage, thereby improving the versatility and reliability of the EGR valve. Furthermore, the integrated die-casting has higher structural strength, effectively increasing the strength of the EGR valve.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to an EGR valve, an engine and a vehicle. Background Art

[0002] The EGR valve (Exhaust Gas Recirculation valve) is an important component used in automobile engines. Its main function is to reintroduce part of the exhaust gas into the intake system and control the amount of exhaust gas.

[0003] In existing technology, EGR valves are typically made of aluminum alloy. However, exhaust gases contain a variety of components, including water vapor, carbon dioxide, nitrogen oxides, and incompletely burned hydrocarbons, which can form acidic substances under certain conditions. Long-term exposure to corrosive exhaust gases can lead to corrosion and roughening of the valve body. Furthermore, EGR, as a fuel-saving and emission-reducing technology, is increasingly being used in hybrid vehicles. The operating conditions of hybrid vehicles make acidic condensation more likely to form around the EGR valve, making the valve body more susceptible to corrosion, leading to problems such as valve sticking, abnormal noise, and fluid and air leaks. Summary of the Invention

[0004] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, the present invention provides an EGR valve that prevents exhaust gas entering the exhaust passage from directly contacting the inner wall of the exhaust passage, thereby preventing corrosion of the inner wall of the exhaust passage. This, in turn, fundamentally resolves issues such as EGR valve sticking, abnormal noise, and fluid and gas leakage.

[0005] The present invention also provides an engine, comprising the above-mentioned EGR valve.

[0006] The present invention also provides a vehicle, comprising the above-mentioned engine.

[0007] An EGR valve according to an embodiment of the present invention is used for a vehicle and includes: a valve body, the valve body having an exhaust gas passage, the inner wall of the exhaust gas passage being coated with a stainless steel layer, the stainless steel layer being formed into a bushing arranged in the exhaust gas passage, the valve body and the bushing being formed into an integral part by a die-casting process, and the outer wall surface of the bushing being in contact with the inner wall surface of the exhaust gas passage.

[0008] According to an embodiment of the present invention, the EGR valve has an exhaust gas passage. A stainless steel layer is coated on the inner wall of the exhaust gas passage to prevent exhaust gas entering the exhaust gas passage from directly contacting the inner wall of the exhaust gas passage, thereby preventing corrosion of the inner wall of the exhaust gas passage. This fundamentally solves problems such as EGR valve sticking, abnormal noise, liquid leakage, and air leakage, thereby improving the reliability of the EGR valve. At the same time, the stainless steel layer is formed into a bushing located in the exhaust gas passage, adapting to the exhaust gas passage with a complex structure, ensuring that the stainless steel layer and the inner wall of the exhaust gas passage are completely and tightly fitted, thereby improving the versatility and reliability of the EGR valve. Furthermore, the valve body and bushing are formed into an integral part through a die-casting process, ensuring that the outer wall of the bushing is in contact with the inner wall of the exhaust gas passage. The integrated die-casting has higher structural strength, effectively improving the strength of the EGR valve, enabling it to withstand greater working pressure and impact.

[0009] In some embodiments of the present invention, the outer wall surface of the bushing has a reinforcement structure.

[0010] In some embodiments of the present invention, the inner wall surface of the exhaust gas channel has a mating structure that cooperates with the reinforcement structure, the reinforcement structure is formed as a protrusion provided on the outer wall surface of the bushing, and the mating structure is formed as a groove that cooperates with the protrusion; and / or, the reinforcement structures are multiple and spaced apart, and the mating structures are multiple and correspond one to one with the reinforcement structures.

[0011] In some embodiments of the present invention, the exhaust gas channel includes a first channel and a second channel that are interconnected, and the axis of the first channel and the axis of the second channel are at an angle to each other. The sleeve includes: a first section, the first section is covered on the inner wall of the first channel; a second section, the second section is covered on the inner wall of the second channel, and the second section is connected to the first section.

[0012] In some embodiments of the present invention, the first section and the second section are a single piece.

[0013] In some embodiments of the present invention, the angle between the axis of the first channel and the axis of the second channel is 45°-135°.

[0014] In some embodiments of the present invention, the end of the first channel facing away from the second channel is configured as an inlet, and the outer wall surface of the valve body having the inlet has a first groove, the first groove surrounds the inlet and is radially open inward to connect to the inlet, and the end of the first section facing away from the second section has a first flange, the first flange extends in a ring shape along the circumferential direction of the first section, and the first flange is arranged in the first groove.

[0015] In some embodiments of the present invention, one end of the first flange close to the inlet is flush with the outer wall surface of the valve body having the inlet.

[0016] In some embodiments of the present invention, the end of the second channel facing away from the first channel is configured as an outlet, the outer wall surface of the valve body having the outlet has a second groove, the second groove surrounds the outlet and is radially open inward to connect to the outlet, the end of the second section facing away from the first section has a second flange, the second flange extends in a ring shape along the circumferential direction of the second section, and the second flange is arranged in the second groove.

[0017] In some embodiments of the present invention, an end of the second flange close to the outlet is flush with an outer wall surface of the valve body forming the outlet.

[0018] In some embodiments of the present invention, the valve body has a guide channel, which is connected to the exhaust gas channel. The EGR valve also includes: a valve, which includes a guide rod and a valve plate. The guide rod is inserted into the guide channel and the exhaust gas channel. The valve plate is connected to one end of the guide rod located in the exhaust gas channel in the length direction. The guide rod can move along the length direction of the guide channel to drive the valve plate to connect or disconnect the first channel and the second channel.

[0019] In some embodiments of the present invention, the guide channel is connected to the second channel, the guide rod is located in the guide channel and the second channel, and the inner wall of the first section has a step portion, which is used to abut against the valve plate to disconnect the first channel and the second channel.

[0020] In some embodiments of the present invention, the valve plate is located on a side of the step portion away from the guide channel.

[0021] In some embodiments of the present invention, the bushing further includes a third section, and the third section covers at least a portion of an inner wall of the guide channel close to the exhaust channel.

[0022] In some embodiments of the present invention, the present invention further includes: a sealing structure, wherein the sealing structure is located in the third section, the guide rod is passed through the sealing structure, and the sealing structure is used to seal the guide channel.

[0023] In some embodiments of the present invention, the sealing structure is interference fit with the third section.

[0024] In some embodiments of the present invention, the third section has a pressure balancing hole, and the pressure balancing hole is opposite to the sealing structure.

[0025] In some embodiments of the present invention, the sealing structure is a stainless steel part.

[0026] In some embodiments of the present invention, the EGR valve further includes: a guide structure, wherein the guide structure is located in the guide channel, and the guide rod is disposed in the guide structure.

[0027] In some embodiments of the present invention, a rounded corner is provided between any two adjacent surfaces of the bushing.

[0028] In some embodiments of the present invention, the bushing has a mounting hole for mounting a sensor.

[0029] An engine according to an embodiment of the present invention includes: the above-mentioned EGR valve; an exhaust system, the air outlet of the exhaust system is connected to the air inlet of the exhaust passage; and an intake system, the air outlet of the exhaust passage is connected to the air outlet of the exhaust passage.

[0030] According to an embodiment of the present invention, an engine is provided with an EGR valve. The exhaust system's outlet is connected to the exhaust passage's inlet, and the intake system is connected to the exhaust passage's outlet. The valve body includes an exhaust passage. A stainless steel layer is coated on the inner wall of the exhaust passage to prevent exhaust gas entering the passage from directly contacting the inner wall, thereby preventing corrosion of the inner wall. This fundamentally addresses EGR valve sticking, abnormal noise, and fluid and air leakage, thereby improving engine reliability. Furthermore, the stainless steel layer is formed into a bushing within the exhaust passage, adapting to the complex structure of the exhaust passage. This ensures a complete and tight fit between the stainless steel layer and the inner wall of the exhaust passage, thereby improving the engine's versatility and reliability. Furthermore, the valve body and bushing are formed into an integral part through a die-casting process, ensuring that the outer wall of the bushing fits the inner wall of the exhaust passage. The integrated die-casting has a higher structural strength, effectively improving the strength of the EGR valve and enabling it to withstand greater operating pressure and impact.

[0031] In some embodiments of the present invention, the system further includes an EGR cooler, wherein the EGR cooler is located between the exhaust system and the EGR valve or between the intake system and the EGR valve.

[0032] A vehicle according to an embodiment of the present invention includes the above-mentioned engine.

[0033] According to an embodiment of the present invention, a vehicle is provided with an engine, an exhaust system outlet is connected to an exhaust passage inlet, and an intake system is connected to an exhaust passage outlet. A valve body includes an exhaust passage. A stainless steel layer is coated on the inner wall of the exhaust passage to prevent exhaust gas entering the exhaust passage from directly contacting the inner wall of the exhaust passage, thereby preventing corrosion of the inner wall of the exhaust passage. This fundamentally addresses EGR valve sticking, abnormal noise, and fluid and air leakage, thereby improving vehicle reliability. Furthermore, the stainless steel layer is formed into a bushing within the exhaust passage, adapting to the complex structure of the exhaust passage, ensuring a complete and tight fit between the stainless steel layer and the inner wall of the exhaust passage, thereby improving the versatility and reliability of the engine. Furthermore, the valve body and bushing are formed into an integral part through a die-casting process, ensuring that the outer wall of the bushing fits the inner wall of the exhaust passage. The integrated die-casting has higher structural strength, effectively improving the strength of the EGR valve and enabling it to withstand greater operating pressure and impact.

[0034] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0036] Figure 1 is a structural diagram of an EGR valve according to an embodiment of the present invention;

[0037] Figure 2 is a cross-sectional view of an EGR valve according to an embodiment of the present invention;

[0038] Figure 3 is a structural diagram of a bushing according to an embodiment of the present invention;

[0039] Figure 4 is a cross-sectional view of a bushing according to an embodiment of the present invention;

[0040] Figure 5 4 is a structural diagram of an EGR valve and an EGR cooler according to an embodiment of the present invention.

[0041] Reference numerals:

[0042] 100, EGR valve;

[0043] 1. Valve body; 11. Exhaust channel; 111. First channel; 1111. Inlet; 112. Second channel; 1121. Outlet; 12. Guide channel; 13. First groove; 14. Second groove;

[0044] 2. Bushing; 21. Reinforcement structure; 22. First section; 221. First flange; 222. Mounting hole; 223. Step; 23. Second section; 231. Second flange; 24. Third section; 241. Pressure balance hole;

[0045] 3. Valve; 31. Guide rod; 32. Valve disc;

[0046] 4. Sealing structure;

[0047] 5. Guiding structure;

[0048] 6. Driving mechanism;

[0049] 200. EGR cooler. DETAILED DESCRIPTION

[0050] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0052] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0053] Hereinafter, an EGR valve 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0054] like Figures 1-4 As shown, an EGR valve 100 according to an embodiment of the present invention is used for a vehicle. The EGR valve 100 includes a valve body 1, wherein the valve body 1 has an exhaust gas channel 11, and the inner wall of the exhaust gas channel 11 is covered with a stainless steel layer, which is formed into a sleeve 2 arranged in the exhaust gas channel 11.

[0055] It is understood that the exhaust passage 11 has an inlet 1111 and an outlet 1121. The inlet 1111 of the exhaust passage 11 is connected to the exhaust system's outlet, while the outlet 1121 of the exhaust passage 11 is connected to the intake system. Thus, exhaust gas returning from the exhaust system flows into the exhaust passage 11 through the inlet 1111 of the exhaust passage 11, and then flows into the intake system through the outlet 1121 of the exhaust passage 11.

[0056] Specifically, the intake system includes a primary intake port and a secondary intake port. When the EGR valve is closed, the outlet 1121 of the exhaust passage 11 is disconnected from the secondary intake port, and the intake system draws air through the primary intake port. When the EGR valve is open, the outlet 1121 of the exhaust passage 11 is connected to the secondary intake port, providing supplemental air intake to the intake system.

[0057] By coating the inner wall of the exhaust passage 11 with a stainless steel layer, exhaust gas entering the exhaust passage 11 is prevented from directly contacting the inner wall of the exhaust passage 11, thereby preventing corrosion of the inner wall of the exhaust passage 11. This fundamentally solves problems such as EGR valve 100 sticking, abnormal noise, and leakage, thereby improving the reliability of the EGR valve 100. Furthermore, stainless steel is less expensive than polymer coatings, effectively reducing the cost of the EGR valve 100 while solving these problems.

[0058] By forming a stainless steel layer into a bushing 2 disposed within the exhaust gas passage 11, the inner wall of the exhaust gas passage 11 is coated with the stainless steel layer, so that the stainless steel layer and the inner wall of the exhaust gas passage 11 are completely and tightly fitted. Furthermore, compared to the prior art in which an anti-corrosion coating is applied to the inner wall of the exhaust gas passage, which is difficult to apply uniformly or has blind spots that are difficult to reach, the bushing 2 of the present application can be customized according to the specific shape and structure of the exhaust gas passage 11, thereby adapting to the exhaust gas passage 11 with a complex structure, ensuring that the stainless steel layer and the inner wall of the exhaust gas passage 11 are completely and tightly fitted, completely eliminating direct contact between the exhaust gas and the inner wall of the exhaust gas passage 11, and improving the versatility and reliability of the EGR valve 100.

[0059] Optionally, the valve body 1 is made of aluminum alloy. Thus, this configuration can reduce the weight of the valve body 1, improve fuel economy, and ensure that the valve body 1 has high strength and hardness to meet the use requirements of the EGR valve 100 under complex working conditions.

[0060] Optionally, the bushing 2 is made of a stainless steel material with strong corrosion resistance, such as SUS304L or SUS316L. Those skilled in the art should know that other stainless steel materials with satisfactory corrosion resistance can also be used to make the bushing 2.

[0061] The valve body 1 and the bushing 2 are formed into an integral part through a die-casting process, and the outer wall surface of the bushing 2 fits with the inner wall surface of the exhaust gas channel 11. Specifically, the bushing 2 is first made, and then the bushing 2 is placed in the mold of the valve body 1. Finally, the molten metal is quickly pressed into the mold of the valve body 1 by high pressure and the mold is closed. After the molten metal is cooled and solidified, the valve body 1 and the bushing 2 are formed into an integral part through a die-casting process. Thus, the valve body 1 and the bushing 2 are formed into an integral part through a die-casting process, so that the outer wall surface of the bushing 2 fits with the inner wall surface of the exhaust gas channel 11, so that the inner wall of the exhaust gas channel 11 is coated with a stainless steel layer, thereby preventing the exhaust gas from directly contacting the inner wall of the exhaust gas channel 11. At the same time, the integrated die-casting has higher structural strength, which effectively improves the strength of the EGR valve 100, enabling it to withstand greater working pressure and impact.

[0062] Optionally, the bushing 2 is formed by a die-casting process or a casting process. Thus, such a configuration ensures that the bushing 2 has high precision and high surface quality, helps reduce errors in subsequent processing and assembly of the valve body 1 and the bushing 2, and improves the overall performance of the EGR valve 100.

[0063] According to an embodiment of the present invention, the EGR valve 100 comprises a valve body 1 having an exhaust gas passage 11. A stainless steel layer is coated on the inner wall of the exhaust gas passage 11, preventing exhaust gas entering the exhaust gas passage 11 from directly contacting the inner wall of the exhaust gas passage 11. This prevents corrosion of the inner wall of the exhaust gas passage 11, thereby fundamentally resolving issues such as sticking, abnormal noise, and fluid and gas leakage within the EGR valve 100 and improving the reliability of the EGR valve 100. Furthermore, the stainless steel layer forms a bushing 2 within the exhaust gas passage 11, adapting to the complex structure of the exhaust gas passage 11 and ensuring a complete and tight fit between the stainless steel layer and the inner wall of the exhaust gas passage 11, thereby enhancing the versatility and reliability of the EGR valve 100. Furthermore, the valve body 1 and bushing 2 are formed into an integral component through a die-casting process, ensuring that the outer wall of the bushing 2 conforms to the inner wall of the exhaust gas passage 11. The integrated die-cast component also possesses greater structural strength, effectively enhancing the strength of the EGR valve 100 and enabling it to withstand greater operating pressures and impacts.

[0064] It should be noted that a completely tight fit means there is no gap visible to the naked eye between the two parts. The bonding force between the two parts is relatively strong, making it impossible to remove one without damaging the other, and the parts cannot be restored after removal. Bonding can be achieved through processes such as die-casting and fluorine coating. Conventional bonding between two parts often results in visible tiny gaps or adhesive residue, and the bonding force is relatively low, allowing one part to be removed without damaging the other.

[0065] In some embodiments of the present invention, Figure 3 As shown, the outer wall surface of the bushing 2 has a reinforcement structure 21. This arrangement improves the structural strength of the bushing 2, preventing deformation or cracking, thereby ensuring the reliability of the EGR valve 100. Furthermore, the valve body 1 and bushing 2 are formed into an integral part through a die-casting process. Therefore, during the die-casting process of forming the valve body 1 and bushing 2 into an integral part, the reinforcement structure 21 on the outer wall surface of the bushing 2 effectively disperses and resists the stress and impact forces generated during the high-pressure casting process, preventing deformation or cracking of the bushing 2 and ensuring the yield rate of the bushing 2.

[0066] In some embodiments of the present invention, Figure 3 As shown, the inner wall of the exhaust passage 11 has a mating structure that mates with a reinforcement structure 21. The reinforcement structure 21 is formed as a protrusion on the outer wall of the bushing 2, and the mating structure is formed as a groove that mates with the protrusion. Thus, the protrusion enhances the structural strength of the bushing 2, preventing deformation or cracking. Furthermore, the mating structure ensures a precise fit between the bushing 2 and the valve body 1, improving the reliability of the EGR valve 100. Furthermore, the mating structure 21 helps ensure a precise fit between the bushing 2 and the valve body 1, thereby ensuring that the inner wall of the exhaust passage 11 is coated with a stainless steel layer, further improving the reliability of the EGR valve 100.

[0067] In some embodiments of the present invention, Figure 3 As shown, the reinforcement structure 21 is a plurality of spaced apart matching structures corresponding one to one with the reinforcement structure 21. It is understandable that the matching structures are a plurality of matching structures corresponding one to one with the reinforcement structure 21, thereby improving the structural strength of the bushing 2 through the plurality of reinforcement structures 21 to prevent deformation or cracking.

[0068] In some embodiments of the present invention, Figures 1-4 As shown, the exhaust channel 11 includes a first channel 111 and a second channel 112 that are interconnected, the axis of the first channel 111 and the axis of the second channel 112 are at an angle to each other, and the bushing 2 includes a first section 22 and a second section 23, the first section 22 is covered on the inner wall of the first channel 111, the second section 23 is covered on the inner wall of the second channel 112, and the second section 23 is connected to the first section 22.

[0069] Thus, by having the first section 22 covering the inner wall of the first channel 111 and the second section 23 covering the inner wall of the second channel 112, the inner wall of the exhaust channel 11 is covered with a stainless steel layer, thereby preventing the exhaust gas from contacting the inner wall of the exhaust channel 11. At the same time, by having the axes of the first channel 111 and the second channel 112 form an angle with each other, the airflow resistance and eddy currents of the exhaust gas flowing through the exhaust channel 11 are reduced, allowing the exhaust gas to flow more smoothly, thereby improving the efficiency of exhaust gas recirculation.

[0070] In some embodiments of the present invention, the first section 22 and the second section 23 are integrally formed, thereby improving the structural strength of the bushing 2 and preventing deformation or cracking, thereby ensuring the reliability of the EGR valve 100 .

[0071] In some embodiments of the present invention, the angle between the axis of the first channel 111 and the axis of the second channel 112 is 45°-135°. Thus, by limiting the angle between the axis of the first channel 111 and the axis of the second channel 112, the smoothness of the exhaust gas flow within the exhaust channel 11 is further ensured. Optionally, the angle between the first channel 111 and the second channel 112 is 45°, 60°, 75°, 90°, 105°, 120°, or 135°.

[0072] In some embodiments of the present invention, Figures 1-4 As shown, the end of the first channel 111 facing away from the second channel 112 is configured as an inlet 1111, and the outer wall surface of the valve body 1 having the inlet 1111 is provided with a first groove 13, the first groove 13 surrounds the inlet 1111 and is radially open inwardly to connect with the inlet 1111, and the end of the first section 22 facing away from the second section 23 is provided with a first flange 221, the first flange 221 extends in a ring shape along the circumferential direction of the first section 22, and the first flange 221 is arranged in the first groove 13.

[0073] It can be understood that the inlet 1111 formed at one end of the first channel 111 away from the second channel 112 is connected to the outlet of the exhaust system, and the exhaust gas flowing back from the exhaust system flows into the exhaust channel 11 through the inlet 1111 of the exhaust channel 11.

[0074] At the same time, since the outer wall surface of the valve body 1 with the inlet 1111 needs to be connected to the exhaust system to realize the communication between the inlet 1111 of the exhaust gas channel 11 and the outlet of the exhaust system, a first groove 13 is provided on the outer wall surface of the valve body 1 with the inlet 1111. The first groove 13 surrounds the inlet 1111 and is radially open inwardly to connect with the inlet 1111. The first flange 221 is arranged in the first groove 13 and extends in a ring shape along the circumferential direction of the first section 22, so that the first flange 221 can be sealed and connected to the exhaust system, thereby preventing the exhaust gas flowing out of the outlet of the exhaust system from contacting the valve body 1, effectively preventing the outer wall surface of the valve body 1 with the inlet 1111 from being corroded and causing the risk of gas leakage, and improving the reliability of the EGR valve 100.

[0075] Furthermore, a first seal is provided between the first flange 221 and the exhaust system outlet, surrounding the exhaust system outlet. This arrangement prevents exhaust gas from coming into contact with the valve body 1. It should be noted that the first seal is highly corrosion-resistant.

[0076] Furthermore, the outer wall surface of the inlet 1111 of the EGR valve 100 forms a flange mounting surface. A first gasket is positioned between the flange mounting surface and the exhaust system. A first sealing member is located on the end of the first gasket facing the EGR valve 100. This further prevents exhaust gas leakage at the connection between the EGR valve 100 and the exhaust system, and the first sealing member located on the end of the first gasket facing the EGR valve 100 prevents exhaust gas flowing out of the exhaust system's outlet from coming into contact with the valve body 1. It should be noted that the first gasket is highly corrosion-resistant.

[0077] In some embodiments, as Figure 3 As shown, the outer wall surface of the first section 22 at the end facing away from the inlet 1111 has a reinforcement structure 21, and the inner wall surface of the first channel 111 has a mating structure that cooperates with the reinforcement structure 21. It is understood that during the process of forming the valve body 1 and the bushing 2 into an integral part through the die-casting process, the first flange 221 disposed within the first groove 13 can effectively disperse and resist the stress and impact forces generated during the high-pressure casting process. Furthermore, the outer wall surface of the first section 22 at the end facing away from the inlet 1111 has the reinforcement structure 21, which further prevents deformation or cracking of the bushing 2, thereby ensuring the yield rate of the bushing 2.

[0078] In some embodiments of the present invention, Figures 1-4As shown, the end of the first flange 221 near the inlet 1111 is flush with the outer wall surface of the valve body 1 having the inlet 1111. It is understandable that the outer wall surface of the valve body 1 having the inlet 1111 needs to be connected to the exhaust system to achieve communication between the inlet 1111 of the exhaust gas channel 11 and the exhaust system's outlet. By having the end of the first flange 221 near the inlet 1111 be flush with the outer wall surface of the valve body 1 having the inlet 1111, the first flange 221 can be sealedly connected to the exhaust system, further preventing exhaust gas flowing out of the exhaust system's outlet from contacting the valve body 1, effectively preventing the risk of corrosion of the outer wall surface of the valve body 1 having the inlet 1111 and gas leakage, and improving the reliability of the EGR valve 100.

[0079] In some embodiments of the present invention, Figures 1-4 As shown, the end of the second channel 112 facing away from the first channel 111 is configured as an outlet 1121, and the outer wall surface of the valve body 1 having the outlet 1121 is provided with a second groove 14, the second groove 14 surrounds the outlet 1121 and is radially open inwardly to connect with the outlet 1121, and the end of the second section 23 facing away from the first section 22 is provided with a second flange 231, the second flange 231 extends in a ring shape along the circumferential direction of the second section 23, and the second flange 231 is arranged in the second groove 14.

[0080] It is understandable that the outlet 1121 formed at one end of the second channel 112 away from the first channel 111 is communicated with the air inlet of the air intake system, so that the exhaust gas in the exhaust channel 11 flows into the air intake system through the outlet 1121 .

[0081] At the same time, since the outer wall surface of the valve body 1 with the outlet 1121 needs to be connected to the intake system to realize the connection between the outlet 1121 of the exhaust gas channel 11 and the air inlet of the intake system, a second groove 14 is provided on the outer wall surface of the valve body 1 with the outlet 1121. The second groove 14 surrounds the outlet 1121 and is open radially inwardly. The second flange 231 is arranged in the second groove 14 and extends in a ring shape along the circumferential direction of the second section 23, so that the second flange 231 can be sealed and connected to the intake system, thereby preventing the exhaust gas flowing out of the outlet 1121 of the exhaust gas channel 11 from contacting the valve body 1, effectively preventing the outer wall surface of the valve body 1 with the outlet 1121 from being corroded and causing the risk of air leakage, and improving the reliability of the EGR valve 100.

[0082] Furthermore, a second seal is provided between the second flange 231 and the intake port of the intake system. The second seal surrounds the outlet 1121 of the exhaust passage 11. This arrangement prevents exhaust gas flowing out of the outlet 1121 of the exhaust passage 11 from coming into contact with the valve body 1. It should be noted that the second seal is highly corrosion-resistant.

[0083] Furthermore, the outer wall of the EGR valve 100, which has outlet 1121, forms a flange mounting surface. A second gasket is positioned between the flange mounting surface and the intake system. A second sealing member is located on the end of the second gasket facing the EGR valve 100. This further prevents exhaust gas leakage at the connection between the EGR valve 100 and the intake system. Furthermore, the second sealing member, located on the end of the second gasket facing the EGR valve 100, prevents exhaust gas flowing out of outlet 1121 of the exhaust passage 11 from contacting the valve body 1. It should be noted that the second gasket is highly corrosion-resistant.

[0084] In some embodiments of the present invention, Figures 1-4 As shown, the end of the second flange 231 near the outlet 1121 is flush with the outer wall surface of the valve body 1 forming the outlet 1121. It is understandable that the outer wall surface of the valve body 1 with the outlet 1121 needs to be connected to the intake system to achieve communication between the outlet 1121 of the exhaust gas channel 11 and the air inlet of the intake system. By having the end of the second flange 231 near the outlet 1121 be flush with the outer wall surface of the valve body 1 with the outlet 1121, the second flange 231 can be sealed with the intake system, further preventing the exhaust gas flowing out of the outlet 1121 of the exhaust gas channel 11 from contacting the valve body 1, effectively preventing the risk of corrosion of the outer wall surface of the valve body 1 with the outlet 1121 and gas leakage, and improving the reliability of the EGR valve 100.

[0085] In some embodiments of the present invention, Figures 1-4 As shown, the valve body 1 has a guide channel 12, which is connected to the exhaust gas channel 11. The EGR valve 100 also includes a valve 3, which includes a guide rod 31 and a valve plate 32. The guide rod 31 is arranged in the guide channel 12 and the exhaust gas channel 11, and the valve plate 32 is connected to one end of the guide rod 31 located in the exhaust gas channel 11 in the length direction. The guide rod 31 can move along the length direction of the guide channel 12 to drive the valve plate 32 to connect or disconnect the first channel 111 and the second channel 112.

[0086] It can be understood that the end of the first channel 111 facing away from the second channel 112 is connected to the exhaust system's outlet, and the end of the second channel 112 facing away from the first channel 111 is connected to the intake of the intake system. Therefore, when the guide rod 31 moves along the length of the guide channel 12 to drive the valve plate 32 to connect the first channel 111 and the second channel 112, exhaust gas returning from the exhaust system flows into the intake system through the first channel 111 and the second channel 112. When the guide rod 31 moves along the length of the guide channel 12 to drive the valve plate 32 to disconnect the first channel 111 and the second channel 112, exhaust gas cannot enter the intake system through the EGR valve 100. Therefore, by moving the guide rod 31 along the length of the guide channel 12 to drive the valve plate 32 to connect or disconnect the first channel 111 and the second channel 112, the EGR system can flexibly adjust the amount of exhaust gas recirculation according to the engine's operating status and emission requirements. At the same time, the guide channel 12 ensures that the guide rod 31 can move stably and accurately along a predetermined path, thereby preventing the guide rod 31 from deflecting or shaking during movement, thereby improving the reliability of the EGR valve 100 .

[0087] Furthermore, the EGR valve 100 further includes a driving mechanism 6 , which is located in the valve body 1 and is used to drive the guide rod 31 to move along the length direction of the guide channel 12 .

[0088] It should be noted that the connection relationship between the valve plate 32 and the guide rod 31 is not limited to this. The valve plate 32 can also be connected to the guide rod 31 in the middle area of ​​the exhaust channel 11 to enable the guide rod 31 to move along the length direction of the guide channel 12, and be used to drive the valve plate 32 to connect or disconnect the first channel 111 and the second channel 112.

[0089] In some embodiments of the present invention, Figures 1-4 As shown, the guide channel 12 is connected to the second channel 112, the guide rod 31 is located in the guide channel 12 and the second channel 112, and the inner wall of the first section 22 has a step portion 223, which is used to abut against the valve plate 32 to disconnect the first channel 111 and the second channel 112.

[0090] It is understood that when the guide rod 31 moves along the length of the guide channel 12 until the step 223 abuts the valve plate 32, disconnecting the first channel 111 and the second channel 112, the exhaust gas cannot enter the intake system through the EGR valve 100. When the guide rod 31 moves along the length of the guide channel 12 until the step 223 is spaced from the valve plate 32, the first channel 111 and the second channel 112 are connected, and the exhaust gas enters the intake system through the EGR valve 100. Thus, the cooperation between the step 223 and the valve plate 32 ensures the connection or disconnection of the first channel 111 and the second channel 112.

[0091] Optionally, the bushing 2 is a one-piece piece formed by casting or die-casting. Thus, the step portion 223 is integrally formed with the first section 22, thereby increasing the structural strength of the step portion 223, further ensuring the reliable fit between the step portion 223 and the valve plate 32, improving the reliability of the EGR valve 100, and reducing the number of press-fit processes and costs. It should be noted that the present application is not limited to this, and the step portion 223 and the first section 22 may also be separate pieces, connected by a press-fit process.

[0092] In some embodiments of the present invention, Figures 1-4 As shown, the valve disc 32 is located on the side of the step 223 facing away from the guide channel 12. Thus, with this arrangement, the first channel 111 and the second channel 112 are disconnected after the valve disc 32 abuts the step 223, and the valve disc 32 is located in the first channel 111, further ensuring that the first channel 111 and the second channel 112 are disconnected, thereby improving reliability.

[0093] In some embodiments of the present invention, Figures 1-4 As shown, the bushing 2 further includes a third section 24, which covers at least a portion of the inner wall of the guide channel 12 near the exhaust channel 11. The EGR valve 100 further includes a sealing structure 4. The sealing structure 4 is located within the third section 24, and the guide rod 31 is disposed through the sealing structure 4. The sealing structure 4 is used to seal the guide channel 12.

[0094] Thus, the third section 24 covers at least a portion of the inner wall of the guide channel 12 near the exhaust channel 11. The sealing structure 4 is located within the third section 24, which seals the guide channel 12, ensuring the tightness of the exhaust channel 11. This prevents gas in the exhaust channel 11 from flowing into the valve body 1 through the guide channel 12 and causing corrosion to the valve body 1. Furthermore, the third section 24 covers at least a portion of the inner wall of the guide channel 12 near the exhaust channel 11, allowing the stainless steel layer to cover at least a portion of the inner wall of the guide channel 12 near the exhaust channel 11. This prevents exhaust gas from corroding the guide channel 12 and improves the reliability of the EGR valve 100.

[0095] In some embodiments of the present invention, Figures 1-4 As shown, the sealing structure 4 is interference-fitted with the third section 24. It is understood that the sealing structure 4 is positioned within the third section 24 by interference press-fitting, so that the sealing structure 4 and the third section 24 have an interference fit, thereby ensuring that the sealing structure 4 blocks the guide channel 12, thereby ensuring the sealing of the exhaust gas channel 11 and preventing the exhaust gas from corroding the valve body 1.

[0096] In some embodiments of the present invention, Figures 1-4As shown, the third section 24 has a pressure balancing hole 241, which is opposite to the sealing structure 4. It is understood that a pressure difference may be generated when exhaust gas flows within the exhaust passage 11. The provision of the pressure balancing hole 241 can effectively balance the pressure inside the exhaust passage 11 with the external environment, preventing structural damage or performance degradation caused by excessive pressure differences, improving the reliability of the EGR valve 100, and effectively extending the service life of the EGR valve 100.

[0097] In some embodiments of the present invention, the sealing structure 4 is made of stainless steel. This configuration prevents corrosion of the sealing structure 4 in contact with the exhaust gas, thereby ensuring the sealing performance of the sealing structure 4, thereby ensuring the sealing performance of the sealing structure 4 in blocking the guide channel 12, and further ensuring the sealing performance of the exhaust gas channel 11, thereby preventing the exhaust gas from corroding the valve body 1.

[0098] In some embodiments of the present invention, Figures 1-4 As shown, the EGR valve 100 further includes a guide structure 5. The guide structure 5 is located within the guide channel 12, and the guide rod 31 is disposed within the guide structure 5. Thus, the guide structure 5 further ensures that the guide rod 31 can move stably and accurately along a predetermined path, preventing deviation or shaking of the guide rod 31 during movement, thereby improving the reliability of the EGR valve 100.

[0099] Furthermore, the bushing 2 includes a third section 24, which covers at least a portion of the inner wall of the guide channel 12 near the exhaust channel 11. The EGR valve 100 also includes a sealing structure 4. The sealing structure 4 is located within the third section 24, and a guide rod 31 is disposed through the sealing structure 4. The sealing structure 4 is used to seal the guide channel 12. The guide structure 5 is located at the end of the sealing structure 4 facing away from the exhaust channel 11. Thus, the sealing structure blocks the guide channel 12, thereby preventing exhaust gas in the exhaust channel 11 from flowing through the guide channel 12 to the guide structure 5. This prevents corrosion of the guide structure 5, thereby ensuring the service life and reliability of the guide structure 5. Optionally, the guide structure is made of copper alloy or stainless steel.

[0100] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, a rounded corner is provided between any two adjacent surfaces of the bushing 2. This arrangement reduces local stress concentration between the two surfaces, improves the structural strength of the bushing 2, and enhances the reliability of the EGR valve 100. Furthermore, during the die-casting or casting of the valve body 1 and the integration of the valve body 1 and bushing 2 through die-casting, this arrangement reduces the difficulty of casting the bushing 2 and reduces the casting failure rate of both the bushing 2 itself and its mating with the valve body 1.

[0101] In some embodiments of the present invention, Figures 1-4As shown, bushing 2 has a mounting hole 222 for mounting a sensor. It will be appreciated that the sensor mounted on EGR valve 100 can monitor data such as the humidity and temperature of exhaust gas entering the intake system through exhaust passage 11, thereby ensuring the reliability of exhaust gas entering the intake system. Thus, bushing 2 has a mounting hole 222 for mounting the sensor, providing a mounting point for the sensor, allowing the sensor to monitor data on exhaust gas entering the intake system through exhaust passage 11. Furthermore, mounting hole 222 is located in first section 22, allowing the sensor mounted thereto to detect data on exhaust gas entering the exhaust passage 11 after processing in the exhaust system.

[0102] For example, the mounting hole 222 is used to mount a temperature sensor, thereby detecting the temperature of the exhaust gas in the exhaust passage 11 through the temperature sensor to ensure the normal operation of the EGR system and the intake system, thereby preventing overheating and optimizing combustion efficiency.

[0103] Next, an engine according to an embodiment of the present invention will be described.

[0104] According to an embodiment of the present invention, the engine Figures 1-4 As shown, the valve comprises an EGR valve 100, an exhaust system, and an intake system. The exhaust system's outlet communicates with the inlet 1111 of the exhaust passage 11, while the intake system communicates with the outlet 1121 of the exhaust passage 11. The valve body 1 and bushing 2 are formed as a single piece through a die-casting process, with the outer wall of the bushing 2 conforming to the inner wall of the exhaust passage 11.

[0105] Thus, the exhaust gas flowing back from the exhaust system flows into the exhaust passage 11 through the inlet 1111 of the exhaust passage 11 , and then flows into the intake system through the outlet 1121 of the exhaust passage 11 .

[0106] Specifically, the intake system includes a primary intake port and a secondary intake port. When the EGR valve is closed, the outlet 1121 of the exhaust passage 11 is disconnected from the secondary intake port, and the intake system draws air through the primary intake port. When the EGR valve is open, the outlet 1121 of the exhaust passage 11 is connected to the secondary intake port, providing supplemental air intake to the intake system.

[0107] By coating the inner wall of the exhaust passage 11 with a stainless steel layer, the exhaust gas entering the exhaust passage 11 is prevented from directly contacting the inner wall of the exhaust passage 11, thereby preventing the inner wall of the exhaust passage 11 from being corroded, thereby fundamentally solving the problems of EGR valve 100 sticking, abnormal noise, liquid leakage and air leakage, and improving the reliability of the engine.

[0108] By forming a stainless steel layer into a bushing 2 disposed within the exhaust gas passage 11, the inner wall of the exhaust gas passage 11 is coated with the stainless steel layer, so that the stainless steel layer and the inner wall of the exhaust gas passage 11 are completely and tightly fitted. Furthermore, compared to applying an anti-corrosion coating on the inner wall of the exhaust gas passage 11, which may be difficult to apply evenly or have blind spots that are difficult to reach, the bushing 2 of the present application can be customized according to the specific shape and structure of the exhaust gas passage 11, thereby adapting to the exhaust gas passage 11 with a complex structure, ensuring that the stainless steel layer and the inner wall of the exhaust gas passage 11 are completely and tightly fitted, completely eliminating direct contact between the exhaust gas and the inner wall of the exhaust gas passage 11, and improving the versatility and reliability of the EGR valve 100.

[0109] The valve body 1 and the bushing 2 are formed into an integral part through a die-casting process, and the outer wall surface of the bushing 2 fits with the inner wall surface of the exhaust gas channel 11. Specifically, the bushing 2 is first made, and then the bushing 2 is placed in the mold of the valve body 1. Finally, the molten metal is quickly pressed into the mold of the valve body 1 by high pressure and the mold is closed. After the molten metal is cooled and solidified, the valve body 1 and the bushing 2 are formed into an integral part through a die-casting process. Thus, the valve body 1 and the bushing 2 are formed into an integral part through a die-casting process, so that the outer wall surface of the bushing 2 fits with the inner wall surface of the exhaust gas channel 11, so that the inner wall of the exhaust gas channel 11 is coated with a stainless steel layer, thereby preventing the exhaust gas from directly contacting the inner wall of the exhaust gas channel 11. At the same time, the integrated die-casting has higher structural strength, which effectively improves the strength of the EGR valve 100, enabling it to withstand greater working pressure and impact.

[0110] According to an embodiment of the present invention, an engine is provided with an EGR valve 100. The exhaust system's outlet is connected to the inlet 1111 of the exhaust passage 11, and the intake system is connected to the outlet 1121 of the exhaust passage 11. The valve body 1 includes the exhaust passage 11. A stainless steel layer is coated on the inner wall of the exhaust passage 11 to prevent exhaust gas entering the exhaust passage 11 from directly contacting the inner wall of the exhaust passage 11, thereby preventing corrosion of the inner wall of the exhaust passage 11. This fundamentally solves problems such as EGR valve 100 sticking, abnormal noise, and fluid and air leakage, thereby improving engine reliability. Furthermore, the stainless steel layer is formed into a bushing 2 disposed within the exhaust passage 11, adapting to the complex structure of the exhaust passage 11 and ensuring a complete and tight fit between the stainless steel layer and the inner wall of the exhaust passage 11, thereby improving the versatility and reliability of the engine. In addition, the valve body 1 and the bushing 2 are formed into an integral part through a die-casting process, ensuring that the outer wall surface of the bushing 2 fits the inner wall surface of the exhaust gas channel 11, and the integrated die-cast part has higher structural strength, effectively improving the strength of the EGR valve 100, enabling it to withstand greater working pressure and impact.

[0111] In some embodiments of the present invention, the engine further includes an EGR cooler 200. The EGR cooler 200 is located between the exhaust system and the EGR valve 100 or between the intake system and the EGR valve 100. It is understood that Figure 5 As shown, the EGR cooler 200 is located between the exhaust system and the EGR valve 100, so that the exhaust gas processed by the exhaust system is cooled by the EGR cooler 200 before entering the EGR valve 100 and then entering the intake system through the outlet 1121 of the exhaust passage 11. Alternatively, the EGR cooler 200 is located between the intake system and the EGR valve 100, so that the exhaust gas flowing out of the outlet 1121 of the exhaust passage 11 is cooled by the EGR cooler 200 before entering the intake system. Thus, the EGR cooler 200 effectively reduces the temperature of the exhaust gas entering the intake system, ensuring that the exhaust gas enters the intake system at an appropriate temperature, thereby improving engine reliability.

[0112] In some embodiments, the EGR cooler 200 is located between the exhaust system and the EGR valve 100, and the end of the first channel 111 facing away from the second channel 112 is configured as an inlet 1111. The outer wall surface of the valve body 1 having the inlet 1111 is provided with a first groove 13, the first groove 13 surrounds the inlet 1111 and is open radially inwardly, the end of the first section 22 facing away from the second section 23 is provided with a first flange 221, the first flange 221 extends in a ring shape along the circumferential direction of the first section 22, and the first flange 221 is arranged in the first groove 13. The outer wall surface of the EGR valve 100 having the inlet 1111 forms a flange mounting surface, and a third gasket is provided between the flange mounting surface and the EGR cooler 200. The third seal is located at the end of the third gasket facing the EGR valve 100, and the third seal surrounds the air outlet of the EGR cooler 200 and abuts against the first flange 221 near the end of the EGR valve 100. Therefore, such a setting prevents the exhaust gas flowing out of the outlet of the EGR cooler 200 from contacting the valve body 1, effectively preventing the outer wall surface of the valve body 1 with the inlet 1111 from being corroded and causing the risk of gas leakage, thereby improving the reliability of the EGR valve 100.

[0113] Next, a vehicle according to an embodiment of the present invention will be described.

[0114] A vehicle according to an embodiment of the present invention includes an engine.

[0115] According to an embodiment of the present invention, a vehicle is provided with an engine, wherein the exhaust system outlet is connected to the inlet 1111 of the exhaust passage 11, and the intake system is connected to the outlet 1121 of the exhaust passage 11. The valve body 1 includes the exhaust passage 11. The inner wall of the exhaust passage 11 is coated with a stainless steel layer to prevent exhaust gas entering the exhaust passage 11 from directly contacting the inner wall of the exhaust passage 11, thereby preventing corrosion of the inner wall of the exhaust passage 11. This fundamentally solves problems such as EGR valve 100 sticking, abnormal noise, and fluid and air leakage, thereby improving vehicle reliability. Furthermore, the stainless steel layer is formed into a bushing 2 disposed within the exhaust passage 11, adapting to the complex structure of the exhaust passage 11, ensuring a complete and tight fit between the stainless steel layer and the inner wall of the exhaust passage 11, thereby improving the versatility and reliability of the engine. In addition, the valve body 1 and the bushing 2 are formed into an integral part through a die-casting process, ensuring that the outer wall surface of the bushing 2 fits the inner wall surface of the exhaust gas channel 11, and the integrated die-cast part has higher structural strength, effectively improving the strength of the EGR valve 100, enabling it to withstand greater working pressure and impact.

[0116] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0117] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An EGR valve, characterized in that: For vehicles, including: A valve body (1) and a valve (3), wherein the valve body (1) has an exhaust gas channel (11) and a guide channel (12), wherein the guide channel (12) is connected to the exhaust gas channel (11), wherein the inner wall of the exhaust gas channel (11) is coated with a stainless steel layer, wherein the stainless steel layer is formed into a bushing (2) arranged in the exhaust gas channel (11), wherein the outer wall surface of the bushing (2) has a reinforcement structure (21), wherein the valve body (1) and the bushing (2) are formed into an integral part by a die-casting process, wherein the outer wall surface of the bushing (2) is in contact with the inner wall surface of the exhaust gas channel (11), wherein the exhaust gas channel (11) includes a first channel (111) and a second channel (112) which are connected to each other, wherein the axis of the first channel (111) and the axis of the second channel (112) form an angle with each other, and wherein the bushing (2) includes: a first section (22), the first section (22) being coated on the inner wall of the first channel (111); a second section (23), the second section (23) being coated on the inner wall of the second channel (112), the second section (23) being connected to the first section (22), and the first section (22) and the second section (23) being an integral part; The third section (24) covers at least a portion of the inner wall of the guide channel (12) close to the exhaust channel (11). The valve (3) includes a guide rod (31). The guide rod (31) is arranged in the guide channel (12) and the exhaust channel (11) and can move along the length direction of the guide channel (12).

2. The EGR valve according to claim 1, characterized in that: The inner wall surface of the exhaust gas channel (11) has a matching structure that matches the reinforcement structure (21), the reinforcement structure (21) is formed as a protrusion provided on the outer wall surface of the bushing (2), and the matching structure is formed as a groove that matches the protrusion; And / or, the reinforcement structures (21) are multiple and spaced apart, and the matching structures are multiple and correspond one-to-one with the reinforcement structures (21).

3. The EGR valve according to claim 1, characterized in that The angle between the axis of the first channel (111) and the axis of the second channel (112) is 45°-135°.

4. The EGR valve according to claim 1, characterized in that One end of the first channel (111) facing away from the second channel (112) is configured as an inlet (1111); an outer wall surface of the valve body (1) having the inlet (1111) is provided with a first groove (13); the first groove (13) surrounds the inlet (1111) and is radially open inwardly to communicate with the inlet (1111); An end of the first section (22) facing away from the second section (23) has a first flange (221), the first flange (221) extending in a ring shape along the circumferential direction of the first section (22), and the first flange (221) is arranged in the first groove (13).

5. The EGR valve according to claim 4, characterized in that: One end of the first flange (221) close to the inlet (1111) is flush with the outer wall surface of the valve body (1) having the inlet (1111).

6. The EGR valve according to claim 1, characterized in that One end of the second channel (112) facing away from the first channel (111) is configured as an outlet (1121); an outer wall surface of the valve body (1) having the outlet (1121) is provided with a second groove (14); the second groove (14) surrounds the outlet (1121) and is radially open inwardly to communicate with the outlet (1112); The end of the second section (23) facing away from the first section (22) has a second flange (231), and the second flange (231) extends in a ring shape along the circumferential direction of the second section (23). The second flange (231) is arranged in the second groove (14).

7. The EGR valve according to claim 6, characterized in that: One end of the second flange (231) close to the outlet (1121) is flush with the outer wall surface of the valve body (1) forming the outlet (1121).

8. The EGR valve according to claim 1, characterized in that The valve (3) further comprises: A valve plate (32) is connected to one end of the guide rod (31) in the length direction of the exhaust gas channel (11), and the guide rod (31) is used to drive the valve plate (32) to connect or disconnect the first channel (111) and the second channel (112).

9. The EGR valve according to claim 8, characterized in that: The guide channel (12) is connected to the second channel (112), the guide rod (31) is located in the guide channel (12) and the second channel (112), the inner wall of the first section (22) has a step portion (223), and the step portion (223) is used to abut against the valve plate (32) to disconnect the first channel (111) and the second channel (112).

10. The EGR valve according to claim 9, characterized in that The valve plate (32) is located on a side of the step portion (223) facing away from the guide channel (12).

11. The EGR valve according to claim 1, characterized in that: Also includes: A sealing structure (4), wherein the sealing structure (4) is located in the third section (24), the guide rod (31) is passed through the sealing structure (4), and the sealing structure (4) is used to block the guide channel (12).

12. The EGR valve according to claim 11, characterized in that: The sealing structure (4) is interference-fitted with the third section (24).

13. The EGR valve according to claim 12, characterized in that The third section (24) has a pressure balancing hole (241), and the pressure balancing hole (241) is opposite to the sealing structure (4).

14. The EGR valve according to claim 12, characterized in that: The sealing structure (4) is a stainless steel part.

15. The EGR valve according to claim 1, characterized in that The EGR valve further includes: A guide structure (5), wherein the guide structure (5) is located in the guide channel (12), and the guide rod (31) is disposed in the guide structure (5).

16. The EGR valve according to claim 1, characterized in that A rounded corner is provided between any two adjacent surfaces of the bushing (2).

17. The EGR valve according to claim 1, characterized in that The bushing (2) has a mounting hole (222) for mounting a sensor.

18. An engine, characterized in that: include: The EGR valve (100) according to any one of claims 1 to 17; an exhaust system, wherein an air outlet of the exhaust system is in communication with an air inlet of the exhaust gas passage (11); An air intake system is connected to the air outlet of the exhaust gas channel (11).

19. The engine according to claim 18, characterized in that Also includes: An EGR cooler (200) is located between the exhaust system and the EGR valve (100) or between the intake system and the EGR valve (100).

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