Carbon removal assembly and egr valve

Abstract

A kind of carbon removal assembly and EGR valve, carbon removal assembly is arranged in EGR valve, EGR valve includes upper valve body and lower valve body, lower valve body is opened through waste gas cavity of lower valve body, valve stem and valve piece are arranged in waste gas cavity, one end of valve stem is connected valve piece, the other end of valve stem is connected upper valve body, carbon removal assembly includes two carbon removal rings and two retaining sleeves, two clamping grooves are arranged in the inner wall of the opposite ends of waste gas cavity, two retaining sleeves are arranged in two clamping grooves respectively, two carbon removal rings are arranged in two retaining sleeves respectively, the inner wall of carbon removal ring is non-planar structure, there is gap between carbon removal ring and valve stem, a plurality of carbon removal ring through holes are arranged in carbon removal ring, which can solve the technical problems that carbon particles removed in the process of carbon removal may still accumulate in guide sleeve or other places, thereby affecting the movement of valve stem, leading to the situation of valve stem jam.

Description

Technical Field

[0001] This utility model relates to the field of automotive engine technology, specifically to a carbon removal component and an EGR valve. Background Technology

[0002] The function of the exhaust gas recirculation system is to reintroduce the exhaust gas from the engine into the intake system, mix it with fresh air, and then enter the cylinder to participate in the combustion process again. It is an automotive exhaust purification device designed to target nitrogen oxides, one of the harmful gases in engine exhaust. The EGR valve, as the most important component of the exhaust gas recirculation system, controls the amount of exhaust gas participating in re-combustion by controlling the valve opening amount. Therefore, its structural reliability directly affects the engine's emissions and fuel consumption. The EGR valve stem moves up and down under the drive of a motor. The valve stem is fixed to the valve, and the movement of the valve stem is the process of adjusting the valve opening amount. Because there are a large amount of organic matter left by unburned fuel and carbon particles produced by incomplete combustion in the engine exhaust gas, they can easily accumulate in the lower part of the valve stem, hindering the up and down movement of the valve. In severe cases, carbon particles can enter the gap between the guide sleeve and the valve stem, causing the valve stem to stick.

[0003] Currently, carbon deposit removal is generally done using filter caps. Filter caps typically have a conical structure, which limits the effective carbon removal area and results in a large clearance between the filter cap and the valve stem. Existing technologies also have other shapes of carbon removal components. However, during the carbon removal process, the removed carbon particles may still enter the guide sleeve or accumulate in other places, which can affect the movement of the valve stem and cause the valve stem to jam. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a carbon removal component and an EGR valve, which aims to solve the technical problem that in the prior art, during the carbon removal process, the removed carbon particles may still enter the guide sleeve or other places and accumulate, thereby affecting the movement of the valve stem and causing the valve stem to jam.

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

[0006] A carbon removal assembly is disposed within an EGR valve. The EGR valve includes an upper valve body and a lower valve body. The lower valve body has an exhaust gas chamber that extends through it. A valve stem and a valve plate are disposed within the exhaust gas chamber. One end of the valve stem is connected to the valve plate, and the other end of the valve stem is connected to the upper valve body. The carbon removal assembly includes two carbon removal rings and two retaining sleeves. Two slots are provided on the inner sidewalls of opposite ends of the exhaust gas chamber. The two retaining sleeves are respectively disposed within the two slots. The two carbon removal rings are respectively disposed within the two retaining sleeves. The inner sidewall of the carbon removal ring has a non-planar structure. There is a gap between the carbon removal ring and the valve stem. The carbon removal ring has several through holes extending through it.

[0007] Furthermore, the minimum gap between the carbon removal ring and the valve stem is 0.05 mm, and the thickness of the carbon removal ring is at least 8 mm.

[0008] Furthermore, the inner wall of the exhaust gas chamber is also provided with a guide sleeve, two fixing rings and two sealing rings. The two opposite ends of the guide sleeve are respectively connected to the two fixing rings, and the two fixing rings are respectively connected to the two sealing rings on the side facing away from the guide sleeve. There is a gap between the guide sleeve and the valve stem.

[0009] Furthermore, the lower valve body is provided with an exhaust gas inlet and an exhaust gas outlet, the exhaust gas chamber is connected to the exhaust gas inlet and the exhaust gas outlet respectively, and the valve plate is disposed in the exhaust gas outlet.

[0010] Furthermore, the upper valve body is provided with an elastomer, a diaphragm, and a tension spring. The elastomer is disposed on the inner side wall of the upper valve body, and one end of the elastomer away from the inner side wall of the upper valve body is connected to the diaphragm. The elastomer and the diaphragm divide the upper valve body from top to bottom into a vacuum chamber and a receiving chamber. The tension spring is disposed in the vacuum chamber, one end of the tension spring is connected to the upper valve body, and the other end of the tension spring is connected to the elastomer.

[0011] Furthermore, the elastomer is integrally formed with the diaphragm.

[0012] Furthermore, the valve stem includes a rod body, a buffer spring, and a positioning post. One end of the rod body is connected to the valve plate, and the end of the rod body facing away from the valve plate passes through the exhaust gas chamber and the receiving chamber, and is connected to the positioning post. The buffer spring is sleeved on the positioning post, and the side of the positioning post facing away from the rod body is connected to the diaphragm.

[0013] Furthermore, a positioning groove is provided on the side of the diaphragm facing the positioning post, and the positioning post matches the positioning groove.

[0014] Furthermore, a vacuum port is provided on the upper valve body, and the vacuum port is connected to the vacuum chamber.

[0015] This invention also provides an EGR valve, which includes the aforementioned carbon removal components.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: When the EGR valve needs to work, it connects to the vacuum chamber through the vacuum port set in the upper valve body. Under the action of vacuum, the valve stem connected to the diaphragm will move up and down. During the movement, the carbon removal ring set on the inner wall of the exhaust gas chamber passes through the valve stem. Because there is a gap between the inner wall of the carbon removal ring and the valve stem, and the inner wall of the carbon removal ring has a non-planar irregular structure and the thickness of the carbon removal ring is at least 8mm, the surface of the valve stem will fully contact the inner wall of the carbon removal ring during the up and down movement. The carbon deposits accumulated on the valve stem can be effectively cleaned. Compared with the traditional The filter cap with a diameter of about 3mm has a larger effective carbon removal range. Due to the elastic metal material of the carbon removal ring, the gap is at least 0.05mm, which will not cause the valve stem to jam due to the distance being too close. This is smaller than the 0.2mm fitting gap of the filter cap in traditional technology. At the same time, due to the several carbon removal ring through holes set on the carbon removal ring, some carbon deposits generated during the carbon removal process will be effectively absorbed by the through holes and further filled into the through holes, or even deposited in the retaining sleeve. This minimizes the possibility of carbon particles entering the guide sleeve or other places and accumulating, affecting the movement of the valve stem and causing the valve stem to jam. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the carbon removal component according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Enlarged structural diagram at point a;

[0020] Figure 3 for Figure 1 Enlarged structural diagram at point b;

[0021] Figure 4 This is a schematic diagram of the structure of the carbon removal ring in the carbon removal assembly of this utility model embodiment;

[0022] Figure 5 This is a cross-sectional view of the connection between the carbon removal ring and the valve stem in the carbon removal assembly of this utility model embodiment.

[0023] Explanation of key component symbols:

[0024] 1. Lower valve body; 10. Exhaust gas chamber; 11. Exhaust gas inlet; 12. Exhaust gas outlet; 13. Slot; 2. Upper valve body; 20. Receiving cavity; 21. Elastomer; 22. Diaphragm; 23. Tension spring; 24. Vacuum chamber; 25. Vacuum port; 26. Positioning groove; 3. Valve stem; 30. Stem body; 31. Buffer spring; 32. Positioning pin; 33. Valve plate; 4. Carbon removal assembly; 40. Carbon removal ring; 401. Carbon removal ring hole; 41. Retaining sleeve; 42. Guide sleeve; 43. Sealing ring; 44. Fixing ring.

[0025] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0026] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used herein are for illustrative purposes only and are not intended to 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 should not be construed as limiting the present invention.

[0028] In this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0029] Please see Figures 1 to 5This utility model discloses a carbon removal component applied to an EGR valve. The EGR valve includes an upper valve body 2 and a lower valve body 1. An exhaust gas chamber 10 is formed inside the lower valve body 1, and a valve stem 3 and a valve plate 33 are disposed within the exhaust gas chamber 10. One end of the valve stem 3 is connected to the valve plate 33, and the other end of the valve stem 3 is connected to the upper valve body 2. The carbon removal component 4 includes two carbon removal rings 40 and two retaining sleeves 41. Two retaining sleeves are disposed on the inner sidewalls of opposite ends of the exhaust gas chamber 10. The groove 13, the two retaining sleeves 41 are respectively disposed in the two retaining sleeves 41, the two carbon removal rings 40 are respectively disposed in the two retaining sleeves 41, the inner sidewall of the carbon removal ring 40 is a non-planar structure, the carbon removal ring 40 has a gap with the valve stem 3, the carbon removal ring 40 has a plurality of carbon removal ring through holes 401 that penetrate the carbon removal ring 40, it is worth noting that the distribution of the carbon removal ring through holes 401 is random and they can also be interconnected, so that carbon particles can fall into them when being cleaned by the carbon removal ring 40.

[0030] The minimum gap between the carbon removal ring 40 and the valve stem 3 is 0.05 mm, and the thickness of the carbon removal ring 40 is at least 8 mm.

[0031] The inner wall of the exhaust gas chamber 10 is also provided with a guide sleeve 42, two fixing rings 44 and two sealing rings 43. The two opposite ends of the guide sleeve 42 are respectively connected to the two fixing rings 44, and the sides of the two fixing rings 44 facing away from the guide sleeve 42 are respectively connected to the sealing rings 43. There is a gap between the guide sleeve 42 and the valve stem 3.

[0032] The lower valve body 1 is provided with an exhaust gas inlet 11 and an exhaust gas outlet 12. The exhaust gas chamber 10 is connected to the exhaust gas inlet 11 and the exhaust gas outlet 12 respectively. The valve plate 33 is disposed in the exhaust gas outlet 12. The exhaust gas circulates and reacts in the exhaust gas chamber 10. The opening and closing degree of the exhaust gas outlet 12 can be controlled by adjusting the distance between the valve plate 33 and the valve rod 3, thereby controlling the amount of exhaust gas participating in the reaction. According to actual needs, the reuse of exhaust gas is more efficient.

[0033] An elastic body 21, a diaphragm 22, and a tension spring 23 are disposed inside the upper valve body 2. The elastic body 21 is arranged around the inner wall of the upper valve body 2. One end of the elastic body 21 away from the inner wall of the upper valve body 2 is connected to the diaphragm 22. The elastic body 21 and the diaphragm 22 divide the upper valve body 2 into a vacuum chamber 24 and a receiving chamber 20 from top to bottom. The tension spring 23 is disposed in the vacuum chamber 20. One end of the tension spring 23 is connected to the inner wall of the upper valve body 2, and the other end of the tension spring 23 is connected to the elastic body 21. The tension spring 23 can quickly help the diaphragm return to its original position.

[0034] The elastomer 21 and the diaphragm 22 are integrally formed. This design reduces the potential risks of gaps in the connection when performing vacuum operations in the vacuum chamber 24.

[0035] The valve stem 3 includes a stem body 30, a buffer spring 31, and a positioning post 32. One end of the stem body 30 is connected to the valve plate 33, and the end of the stem body 30 facing away from the valve plate 33 passes through the exhaust gas chamber 10 and the receiving chamber 20 and is connected to the positioning post 32. The buffer spring 31 is sleeved on the positioning post 32, and the side of the positioning post 32 facing away from the stem body 30 is connected to the diaphragm 22.

[0036] The diaphragm 22 is provided with a positioning groove 26 on the side facing the positioning post 32, and the positioning post 32 matches the positioning groove 26.

[0037] The upper valve body 2 is provided with a vacuum port 25, which is connected to the vacuum chamber 24.

[0038] The carbon removal ring 40 is made of elastic metal, so that even if there is some friction during the movement of the valve stem 3, the valve stem 3 will not get stuck or affected due to the elastic metal material.

[0039] Specifically, when the EGR valve is working, it connects to the vacuum chamber 24 through the vacuum port 25 located in the upper valve body 2. When the vacuum port 25 draws air outward, air is lost from the vacuum chamber 24. Under the action of vacuum, the diaphragm 22 and the elastic body 21 will move upward, which will further drive the valve stem 3 connected to the diaphragm 22 to move upward. When air is input into the vacuum port 25, the diaphragm 22 and the elastic body 21 will return to their original position under the action of the tension spring 23 and the air pressure, which will further drive the valve stem 3 to move downward.

[0040] Then, as the valve stem 3 moves up and down, it passes through the carbon removal ring 40 set on the inner wall of the exhaust gas chamber 10. Due to the gap between the inner wall of the carbon removal ring 40 and the valve stem 3, the inner wall of the carbon removal ring 40 has a non-planar irregular structure, and the thickness of the carbon removal ring 40 is at least 8mm. At the same time, the carbon deposition on the surface of the valve stem 3 will also cause the surface of the valve stem 3 to have an irregular carbon deposition distribution. This makes the surface of the valve stem 3 fully contact the inner wall of the carbon removal ring 40 during the up and down movement, and the carbon deposits accumulated on the valve stem 3 can be effectively cleaned. Compared with the effective carbon removal range of about 3mm of the traditional filter cap, it is larger. Due to the elastic metal material of the carbon removal ring 40, the gap is at least 0.05mm and will not cause the valve stem 3 to jam due to the distance being too close. Compared with the 0.2mm fitting gap of the filter cap in the traditional technology, it is smaller.

[0041] Finally, because several carbon removal ring through holes 401 are provided on the carbon removal ring 40, some carbon particles generated during the carbon removal process will be effectively absorbed by the through holes and further fill into the through holes, or even deposit in the retaining sleeve 41. This minimizes the possibility of carbon particles entering the guide sleeve 42 or other places and accumulating, affecting the movement of the valve stem 3 and causing the valve stem 3 to jam. When maintaining the EGR valve, the carbon removal ring 40 and retaining sleeve 41 can be removed and replaced separately, which increases the service life of the EGR valve and reduces maintenance costs during maintenance.

[0042] Furthermore, embodiments of this utility model also provide an EGR valve, which includes the aforementioned decarbonization components.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0044] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A carbon removal component, disposed within an EGR valve, characterized in that... The EGR valve includes an upper valve body and a lower valve body. The lower valve body has an exhaust gas chamber that extends through it. A valve stem and a valve plate are disposed within the exhaust gas chamber. One end of the valve stem is connected to the valve plate, and the other end of the valve stem is connected to the upper valve body. The carbon removal assembly includes two carbon removal rings and two retaining sleeves. Two slots are provided on the inner sidewalls of opposite ends of the exhaust gas chamber. The two retaining sleeves are respectively disposed in the two slots. The two carbon removal rings are respectively disposed in the two retaining sleeves. The inner sidewall of the carbon removal ring has a non-planar structure. There is a gap between the carbon removal ring and the valve stem. The carbon removal ring has several through holes that extend through it.

2. The carbon removal component according to claim 1, characterized in that, The minimum gap between the carbon removal ring and the valve stem is 0.05 mm, and the thickness of the carbon removal ring is at least 8 mm.

3. The carbon removal component according to claim 1, characterized in that, The inner wall of the exhaust gas chamber is also provided with a guide sleeve, two fixing rings and two sealing rings. The two opposite ends of the guide sleeve are respectively connected to the two fixing rings, and the sides of the two fixing rings facing away from the guide sleeve are respectively connected to the sealing rings. There is a gap between the guide sleeve and the valve stem.

4. The carbon removal component according to claim 1, characterized in that, The lower valve body is provided with an exhaust gas inlet and an exhaust gas outlet, the exhaust gas chamber is connected to the exhaust gas inlet and the exhaust gas outlet respectively, and the valve plate is disposed in the exhaust gas outlet.

5. The carbon removal component according to claim 1, characterized in that, The upper valve body is provided with an elastomer, a diaphragm and a tension spring. The elastomer is arranged around the inner wall of the upper valve body. One end of the elastomer away from the inner wall of the upper valve body is connected to the diaphragm. The elastomer and the diaphragm divide the upper valve body from top to bottom into a vacuum chamber and a receiving chamber. The tension spring is arranged in the vacuum chamber. One end of the tension spring is connected to the upper valve body and the other end of the tension spring is connected to the elastomer.

6. The carbon removal component according to claim 5, characterized in that, The elastomer is integrally formed with the diaphragm.

7. The carbon removal component according to claim 5, characterized in that, The valve stem includes a rod body, a buffer spring, and a positioning post. One end of the rod body is connected to the valve plate, and the end of the rod body facing away from the valve plate passes through the exhaust gas chamber and the receiving chamber, and is connected to the positioning post. The buffer spring is sleeved on the positioning post, and the side of the positioning post facing away from the rod body is connected to the diaphragm.

8. The carbon removal component according to claim 7, characterized in that, The diaphragm has a positioning groove on the side facing the positioning post, and the positioning post matches the positioning groove.

9. The carbon removal component according to claim 5, characterized in that, The upper valve body is provided with a vacuum port, which is connected to the vacuum chamber.

10. An EGR valve, characterized in that, Includes the carbon removal component as described in any one of claims 1-9.

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