Exhaust gas recirculation valve, exhaust gas recirculation system and vehicle
Through the use of plastic materials and innovative design, the corrosion problem of exhaust gas recirculation valve in high temperature and water-containing environments is solved, the corrosion resistance and sealing of the valve is improved, the safety and reliability of the vehicle are ensured, and the manufacturing is reduced. cost.
Patent Information
- Application Number
- CN202420354741.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-02-26
AI Technical Summary
The exhaust gas recirculation valve is prone to corrosion in high temperature, high water content and corrosive elements, affecting the safety and reliability of the vehicle.
The valve body and the cover are manufactured with plastic materials, combined with the design of clamping parts, seals and filter parts to avoid corrosion precipitates and solutions entering the valve body and reduce manufacturing costs.
It improves the corrosion resistance and sealing of the exhaust gas recirculation valve, extends the service life of the valve, enhances the safety and reliability of the vehicle, and reduces manufacturing costs.
Smart Images
Figure CN222333917U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of exhaust gas recirculation valves, and in particular to an exhaust gas recirculation valve, an exhaust gas recirculation system and a vehicle. Background Art
[0002] The exhaust gas recirculation system is mainly used to control the exhaust gas flow of the vehicle engine. Exhaust gas has the characteristics of high temperature, high water content, and corrosive elements. When the exhaust gas recirculation system is working, the exhaust gas will enter the exhaust gas recirculation valve, which will cause corrosion to the exhaust gas recirculation valve and affect the safety of vehicle driving. Utility Model Content
[0003] In order to solve the above technical problems, the present application provides an exhaust gas recirculation valve, an exhaust gas recirculation system and a vehicle, which are used to solve the problem that the exhaust gas recirculation valve is prone to corrosion.
[0004] In a first aspect, an embodiment of the present application provides an exhaust gas recirculation valve, which includes a valve body and a plug cover. The valve body has a valve front cavity and a valve rear cavity that are interconnected, the valve front cavity has an air inlet, and the plug cover is arranged at the air inlet. The valve body and the plug cover are made of plastic.
[0005] According to the exhaust gas recirculation valve of the embodiment of the present application, by making the valve body and the plug cover located in the front cavity of the valve made of plastic, the valve body and the plug cover can be prevented from being corroded in a high-chlorine condensation environment, which is beneficial to improving the corrosion resistance and sealing of the exhaust gas recirculation valve, thereby preventing the appearance of corrosion precipitates and corrosive solutions inside the valve body, and further preventing the exhaust gas recirculation valve from failing, which is beneficial to improving the safety and reliability of vehicle driving. In addition, the valve body and the plug cover made of plastic can reduce the manufacturing cost of the valve body and the plug cover, thereby helping to reduce the manufacturing cost of the exhaust gas recirculation valve.
[0006] In one possible implementation, the exhaust gas recirculation valve also includes a valve seat, a first clamping component is provided on the valve seat, a second clamping component is provided at the connection between the front valve cavity and the rear valve cavity, the first clamping component is clamped with the second clamping component, and the valve seat is made of plastic.
[0007] In one possible implementation, the exhaust gas recirculation valve also includes a valve stem, a filter and a scraper. The scraper is mounted on the valve stem and located on the side of the valve rear cavity away from the valve front cavity. The filter is mounted on the valve stem and located on the side of the scraper close to the valve rear cavity.
[0008] In one possible implementation, the exhaust gas recirculation valve also includes a sleeve, an installation opening is formed at one end of the rear-valve cavity away from the front-valve cavity, the valve stem passes through the installation opening, and the sleeve is arranged at the installation opening. Along the direction from the front-valve cavity to the rear-valve cavity, the sleeve, the filter element and the scraper are sequentially mounted on the valve stem.
[0009] In a possible implementation manner, the filter element is a filter mesh.
[0010] In one possible implementation, the exhaust gas recirculation valve also includes a valve stem and a first seal and a second seal mounted on the valve stem, the first seal and the second seal are located on a side of the valve rear cavity away from the valve front cavity, and a discharge space is provided between the first seal and the second seal, and the discharge space is connected to the valve rear cavity.
[0011] In a possible implementation, a pressure relief hole is formed on the valve body, and the pressure relief hole is used to connect the discharge space and the post-valve cavity.
[0012] In a possible implementation, one end of the pressure relief hole is communicated with the discharge space, and the other end is inclined in a direction away from the central axis of the valve stem.
[0013] In a second aspect, the present application provides an exhaust gas recirculation system, comprising a catalyst, a cooler, the above-mentioned exhaust gas recirculation valve and an intake manifold connected in sequence.
[0014] In a third aspect, the present application provides a vehicle comprising the above-mentioned exhaust gas recirculation system.
[0015] Among them, the technical effects brought about by any design method in the second aspect and the third aspect can refer to the technical effects brought about by different design methods in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0018] Figure 1 A schematic diagram of an exhaust gas recirculation system provided for some embodiments of the present application;
[0019] Figure 2 A schematic diagram of an exhaust gas recirculation valve provided for some embodiments of the present application;
[0020] Figure 3 for Figure 2 Enlarged view circled in the middle.
[0021] Reference numerals:
[0022] 1000. Exhaust gas recirculation system;
[0023] 100, exhaust gas recirculation valve; 101, catalyst; 102, cooler; 103, intake manifold; 104, air filter; 105, throttle valve;
[0024] 1. Valve body; 11. Valve front cavity; 111. Air inlet; 12. Valve rear cavity; 13. Pressure relief hole; 14. Second clamping part;
[0025] 2. Block the cover;
[0026] 3. valve seat; 31. first clamping member;
[0027] 4. Valve stem; 41. Valve plate; 42. Sheath; 43. Filter element; 44. Scraper; 45. First sealing element; 46. Second sealing element; 47. Discharge space. DETAILED DESCRIPTION
[0028] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are 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 should not be understood as a limitation on the present invention.
[0030] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after the connection remains unchanged. In addition, the directional terms mentioned in the embodiments of the present application, such as "inside", "outside", etc., are only references to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, 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 on the embodiments of the present application.
[0031] In the description of the embodiments of the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.
[0032] See also Figure 1 , Figure 1 Schematic diagram of an exhaust gas recirculation system provided in some embodiments of the present application. The present application provides a vehicle, including an exhaust gas recirculation (EGR) system 1000. The exhaust gas recirculation system 1000 is used to control the exhaust gas flow of the vehicle engine, which can reduce pumping loss, fuel temperature, and fuel injection enrichment, thereby achieving the effect of energy saving and emission reduction.
[0033] Please continue reading Figure 1 The present application provides an exhaust gas recirculation system 1000, comprising a catalyst 101, a cooler 102, an exhaust gas recirculation valve 100 and an intake manifold 103 which are connected in sequence. Specifically, after the exhaust gas passes through the catalyst 101, part of the exhaust gas is cooled by the cooler 102, and the exhaust gas flow rate is adjusted by the exhaust gas recirculation valve 100, and then the exhaust gas can be mixed with the fresh air filtered by the air filter 104 at the throttle valve 105, and then enter the cylinder to participate in combustion after being fully mixed through the intake manifold 103.
[0034] In the related art, the exhaust gas recirculation valve adopts an aluminum alloy structure or a stainless steel structure. However, due to the characteristics of high temperature, high water content, and corrosive elements in the exhaust gas, when the exhaust gas enters the exhaust gas recirculation valve, it will corrode the exhaust gas recirculation valve, and the corrosion precipitates and corrosive solutions will enter the exhaust gas recirculation valve with the airflow, thus affecting the safety of vehicle driving.
[0035] In order to solve the above technical problems, the present application provides an exhaust gas recirculation valve. Figure 1 and Figure 2 , Figure 2Schematic diagram of an exhaust gas recirculation valve provided for some embodiments of the present application. The exhaust gas recirculation valve 100 includes a valve body 1 and a plug cover 2. The valve body 1 has a valve front cavity 11 and a valve rear cavity 12 that are interconnected. The valve front cavity 11 has an air inlet 111. The valve front cavity 11 can be connected to a cooler 102, and the valve rear cavity 12 can be connected to an intake manifold 103.
[0036] The valve body 1 may be made of plastic. Thus, the valve body 1 may be prevented from being corroded in a high-chlorine condensation environment, thereby preventing corrosion precipitates and corrosion solutions from appearing inside the valve body 1, thereby preventing the exhaust gas recirculation valve 100 from failing, thereby improving the safety and reliability of vehicle driving. In addition, the valve body 1 may be made of plastic to reduce the manufacturing cost of the valve body 1, thereby reducing the manufacturing cost of the exhaust gas recirculation valve 100.
[0037] The plugging cover 2 may be disposed at the air inlet 111. The plugging cover 2 and the valve body 1 may be connected by plastic welding.
[0038] The plug cover 2 may be made of plastic, thereby preventing the plug cover 2 from being corroded in a high-chlorine condensation environment, thereby preventing the plug cover 2 from falling off. In addition, the plug cover 2 may be made of plastic, which may reduce the manufacturing cost of the plug cover 2, thereby helping to reduce the manufacturing cost of the exhaust gas recirculation valve 100.
[0039] According to the exhaust gas recirculation valve 100 of the embodiment of the present application, by making the valve body 1 and the plug cover 2 located in the front cavity 11 of the valve be made of plastic, the valve body 1 and the plug cover 2 can be prevented from being corroded in a high-chlorine condensation environment, which is beneficial to improving the corrosion resistance and sealing of the exhaust gas recirculation valve 100, thereby preventing the appearance of corrosion precipitates and corrosive solutions inside the valve body 1, and further preventing the exhaust gas recirculation valve 100 from failing, which is beneficial to improving the safety and reliability of vehicle driving. In addition, the valve body 1 and the plug cover 2 are made of plastic, which can reduce the manufacturing cost of the valve body 1 and the plug cover 2, thereby helping to reduce the manufacturing cost of the exhaust gas recirculation valve 100.
[0040] Please continue reading Figure 2 In some embodiments, the exhaust gas recirculation valve 100 may further include a valve seat 3. A first clamping member 31 may be provided on the valve seat 3. A second clamping member 14 may be provided at the connection between the valve front cavity 11 and the valve rear cavity 12. The first clamping member 31 is engaged with the second clamping member 14. The material of the valve seat 3 is plastic. Specifically, the second clamping member 14 may be formed on the valve body 1 by a pre-embedded injection molding process, and the outer peripheral surface of the valve seat 3 may be provided with a first clamping member 31 engaged with the second clamping member 14.
[0041] Exemplarily, the second clamping member 14 on the valve body 1 may be a groove, and the first clamping member 31 of the valve seat 3 may be a protrusion matched with the groove.
[0042] Thus, the valve seat 3 can be connected to the valve body 1 through the clamping cooperation of the first clamping member 31 and the second clamping member 14, which can ensure the reliability of the connection between the valve seat 3 and the valve body 1, and the connection method is simple, which is convenient for assembly and is conducive to improving the assembly speed of the exhaust gas recirculation valve 100. At the same time, the material of the valve seat 3 is plastic, which can prevent the valve seat 3 from being corroded and falling off, thereby further improving the anti-corrosion ability of the exhaust gas recirculation valve 100 and reducing the manufacturing cost of the exhaust gas recirculation valve 100.
[0043] Please continue reading Figure 2 In some embodiments, the exhaust gas recirculation valve 100 may further include a valve stem 4 and a valve plate 41. The valve stem 4 is movably disposed in the valve front cavity 11 and the valve rear cavity 12. The valve plate 41 is disposed at one end of the valve stem 4, and is used to open or close the connection between the valve front cavity 11 and the valve rear cavity 12. Thus, the movement of the valve stem 4 can be controlled by a motor drive, and the valve plate 41 can be driven by the valve stem 4 to move, so that the valve plate 41 can abut against the valve seat 3, so that the connection between the valve front cavity 11 and the valve rear cavity 12 can be opened or closed by the valve plate 41.
[0044] See also Figure 2 and Figure 3 , Figure 3 for Figure 2 The enlarged view is circled in the middle. In some embodiments, the exhaust gas recirculation valve 100 may further include a filter 43 and a scraper 44. The filter 43 is sleeved on the valve stem 4 and is located on the side of the valve rear cavity 12 away from the valve front cavity 11. The scraper 44 is sleeved on the valve stem 4 and is located on the side of the scraper 44 close to the valve rear cavity 12. Thus, the filter 43 can filter the exhaust gas flowing to the scraper 44, and can prevent the particles and corrosion particles in the exhaust gas from accumulating at the scraper 44 when the exhaust gas recirculation valve 100 is working, thereby reducing the corrosion and particles entering the exhaust gas recirculation valve 100, and avoiding the problem of the valve stem 4 and the scraper 44 being stuck.
[0045] See also Figure 2 and Figure 3 , Figure 3 for Figure 2The enlarged view is circled in the middle. In some embodiments, the exhaust gas recirculation valve 100 may further include a sheath 42, a filter 43 and a scraper 44. An installation port may be formed at one end of the post-valve cavity 12 away from the pre-valve cavity 11. The valve stem 4 is provided with the installation port, and the sheath 42 is arranged at the installation port. Along the direction from the pre-valve cavity 11 to the post-valve cavity 12, the sheath 42, the filter 43 and the scraper 44 are sequentially sleeved on the valve stem 4. Specifically, the installation port may be directly opposite to the air inlet 111, the sheath 42 may be located on the side of the filter 43 close to the post-valve cavity 12, the sheath 42 and the scraper 44 may enclose an installation space, and the filter 43 may be located in the installation space on the side of the scraper 44 close to the post-valve cavity 12.
[0046] Since the cooperation mode between the movement mechanisms of the exhaust gas recirculation valve 100 is clearance cooperation when the exhaust gas recirculation valve 100 is working, the particulate matter and corrosion particles in the exhaust gas will flow through the sheath 42 and the scraper 44 under the action of the airflow, and will accumulate at the scraper 44, thereby causing the scraper 44 to be stuck. By arranging the filter 43 between the sheath 42 and the scraper, the filter 43 can filter the particulate matter and corrosion particles in the exhaust gas, thereby avoiding the accumulation of particulate matter and corrosion particles at the scraper 44, reducing the corrosion and particles entering the exhaust gas recirculation valve 100, avoiding the problem of the valve stem 4 and the scraper 44 being stuck, and thus facilitating the improvement of the stability and reliability of the operation of the exhaust gas recirculation valve 100. At the same time, the filter 43 is located between the sheath 42 and the scraper 44, and the filter 43 can be fixed, thereby reducing the difficulty of assembling the filter 43, which is conducive to improving the assembly efficiency of the exhaust gas recirculation valve 100.
[0047] In some embodiments, the filter element 43 is a filter screen, so that the aperture of the filter screen can be set according to the size of the particles, which can reduce the design time of the filter element 43 and thus reduce the manufacturing cost of the exhaust gas recirculation valve 100.
[0048] It should be noted that the filter element 43 may also filter particles in the exhaust gas by electrostatic filtration, activated carbon filtration, etc. There may also be multiple filter elements 43, and multiple filter elements 43 may be stacked to improve the filtering effect.
[0049] Please continue reading Figure 2 and Figure 3 In some embodiments, the exhaust gas recirculation valve 100 may further include a first seal 45 and a second seal 46 sleeved on the valve stem 4. The first seal 45 and the second seal 46 are located on the side of the valve rear cavity 12 away from the valve front cavity 11. By providing the first seal 45 and the second seal 46, particulate matter in the exhaust gas or corrosive condensed corrosive solution can be prevented from entering the interior of the exhaust gas recirculation valve 100, which is conducive to improving the reliability of the exhaust gas recirculation valve 100.
[0050] There is a discharge space 47 between the first sealing member 45 and the second sealing member 46, and the discharge space 47 is in communication with the valve rear cavity 12. Therefore, when particulate matter or condensed corrosive solution in the exhaust gas enters the discharge space 47 through the valve rear cavity 12, it can be discharged back into the valve rear cavity 12, so that the particulate matter or condensed corrosive solution entering the exhaust gas recirculation valve 100 can be discharged from the exhaust gas recirculation valve 100, which can prevent the particulate matter or condensed corrosive solution in the exhaust gas from entering the moving mechanism of the exhaust gas recirculation valve 100 and causing the moving mechanism to be stuck, thereby facilitating the improvement of the stability and reliability of the exhaust gas recirculation valve 100.
[0051] Please continue reading Figure 2 and Figure 3 In some embodiments, a pressure relief hole 13 may be formed on the valve body 1. The pressure relief hole 13 may be used to connect the discharge space 47 and the valve rear cavity 12. By providing the pressure relief hole 13 on the valve body 1, the particulate matter and condensed corrosive solution entering the discharge space 47 may directly flow back into the valve rear cavity 12 through the pressure relief hole 13. At the same time, the manufacture of the valve body 1 is facilitated, which is conducive to improving the manufacturing efficiency of the exhaust gas recirculation valve 100.
[0052] Please continue reading Figure 2 and Figure 3 In some embodiments, one end of the pressure relief hole 13 is connected to the discharge space 47, and the other end is inclined in a direction away from the central axis of the valve stem 4. Specifically, the pressure relief hole 13 is inclined, and in the direction from the valve rear cavity 12 to the valve front cavity 11, one end of the pressure relief hole 13 is adjacent to the valve stem 4, and the other end of the pressure relief hole 13 is away from the valve stem 4. In this way, it is possible to avoid the pressure relief hole 13 affecting the sealing of the first sealing member 45 and the second sealing member 46, thereby ensuring the sealing effect of the exhaust gas recirculation valve 100, and at the same time, it is possible to ensure that the pressure relief hole 13 has sufficient negative pressure to discharge the corrosive particles and condensed corrosive solution in the discharge space 47.
[0053] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.
[0054] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. An exhaust gas recirculation valve, characterized in that: The exhaust gas recirculation valve comprises: A valve body, wherein the valve body comprises a front-valve cavity and a rear-valve cavity which are connected to each other, and the front-valve cavity comprises an air inlet; A plugging cover, the plugging cover is arranged at the air inlet; Wherein, the valve body and the plugging cover are made of plastic; The exhaust gas recirculation valve also includes a valve stem and a first seal and a second seal mounted on the valve stem, the first seal and the second seal are located on a side of the valve rear cavity away from the valve front cavity, a discharge space is provided between the first seal and the second seal, and the discharge space is connected to the valve rear cavity.
2. The exhaust gas recirculation valve according to claim 1, characterized in that: The exhaust gas recirculation valve also includes a valve seat, a first clamping piece is provided on the valve seat, a second clamping piece is provided at the connection between the front valve cavity and the rear valve cavity, the first clamping piece is clamped and matched with the second clamping piece, and the valve seat is made of plastic.
3. The exhaust gas recirculation valve according to claim 1, characterized in that: The exhaust gas recirculation valve also includes a valve stem, a filter and a scraper. The scraper is sleeved on the valve stem and located on a side of the valve rear cavity away from the valve front cavity. The filter is sleeved on the valve stem and located on a side of the scraper close to the valve rear cavity.
4. The exhaust gas recirculation valve according to claim 3, characterized in that: The exhaust gas recirculation valve also includes a sleeve, and an installation opening is formed at one end of the post-valve cavity away from the front-valve cavity. The valve stem passes through the installation opening, and the sleeve is arranged at the installation opening. Along the direction from the front-valve cavity to the post-valve cavity, the sleeve, the filter element and the scraper are sequentially sleeved on the valve stem.
5. The exhaust gas recirculation valve according to claim 4, characterized in that: The filter element is a filter net.
6. The exhaust gas recirculation valve according to claim 1, characterized in that: A pressure relief hole is formed on the valve body, and the pressure relief hole is used to connect the discharge space and the post-valve cavity.
7. The exhaust gas recirculation valve according to claim 6, characterized in that: One end of the pressure relief hole is communicated with the discharge space, and the other end is inclined in a direction away from the central axis of the valve stem.
8. An exhaust gas recirculation system, characterized in that: The invention comprises a catalyst, a cooler, an exhaust gas recirculation valve as claimed in any one of claims 1 to 7 and an intake manifold which are connected in sequence.
9. A vehicle, characterized in that: Comprising the exhaust gas recirculation system as claimed in claim 8.