Electric EGR (Exhaust Gas Recirculation) valve based on electromagnetic coil control

Abstract

The utility model discloses an electric EGR (Exhaust Gas Recirculation) valve based on electromagnetic coil control, which belongs to the technical field of electric EGR valves and is characterized in that a plug is arranged on the side surface of an electric EGR valve body, an adsorption part is arranged at the bottom of the electric EGR valve body, a valve cover is fixedly mounted on the surface of the electric EGR valve body, a vent hole is formed in the side surface of the valve cover, and a valve body is detachably connected to the bottom of the valve cover; according to the electric EGR valve based on electromagnetic coil control, through the conical part arranged on the valve element and the sealing groove formed in the sealing piece, the sealing area of one end of the valve element can be increased, and then the sealing effect of the valve element is greatly improved; and by arranging a reset spring, an upper positioning rod, a lower positioning rod, an adsorption part and an adsorption block, the valve element can stably move under the action of electromagnetic adsorption force, the valve element can stably reset after losing the electromagnetic adsorption force, and the use stability of the electric EGR valve is improved.

Description

Technical Field

[0001] This utility model relates to the field of electric EGR valve technology, and more specifically, to an electric EGR valve based on electromagnetic coil control. Background Technology

[0002] The electric EGR valve is a key component in modern automotive engine management systems, and its core function is to reduce nitrogen oxide emissions by controlling the amount of exhaust gas recirculation.

[0003] Currently, commonly used electric EGR valves exhibit poor sealing performance after prolonged use, and the valve core's reset position may shift, reducing operational stability. For example, CN221547133U discloses a high-temperature resistant electric EGR valve with a sealing structure. The electric EGR valve includes a straight cylinder fixedly connected to the upper side of one side, a pipe fitted into the bottom inner wall of the electric EGR valve, a vertical block fitted into the top groove of the straight cylinder, a sealing structure on one side of the electric EGR valve, and a fastening structure on one side of the straight cylinder.

[0004] As can be seen from the above-disclosed scheme, the electric EGR valve is sealed by a sealing ring during operation. Due to its small contact area, its sealing performance will be reduced after long-term wear. In addition, the common electric EGR valve is supported by a single return spring. After long-term use, the spring force weakens, which leads to changes in its size. This may result in incomplete valve core reset and reduce its operational stability. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide an electric EGR valve based on electromagnetic coil control. This electric EGR valve, through the conical part set in the valve core and the sealing groove set in the sealing element, can increase the sealing area at one end of the valve core, thereby greatly improving the sealing effect of the valve core. Furthermore, through the set return spring, upper positioning rod, lower positioning rod, suction part and suction block, the valve core can move stably under the action of electromagnetic attraction force, and can stably reset after the valve core loses electromagnetic attraction force, thus improving the operational stability of the electric EGR valve.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] An electromagnetic coil-controlled electric EGR valve includes an electric EGR valve body, a plug on the side of the valve body, an adsorption part at the bottom of the valve body, a valve cover fixedly mounted on the surface of the valve body, a vent hole on the side of the valve cover, a valve body detachably connected to the bottom of the valve cover, a connecting flange fixedly connected to the surface of the valve body, a valve chamber at one end of the valve body, a fixing plate fixedly connected to the inner wall of the valve chamber, a through hole in the middle of the fixing plate, and a sealing flange detachably connected to the other end of the valve body. The valve core body is movably connected to one end of the sealing element, and a reset component is provided on the surface of the valve core body. This electric EGR valve based on electromagnetic coil control can increase the sealing area at one end of the valve core through the tapered part of the valve core and the sealing groove of the sealing element, thereby greatly improving the sealing effect of the valve core. Furthermore, through the provided reset spring, upper positioning rod, lower positioning rod, suction part and suction block, the valve core can move stably under the action of electromagnetic attraction force, and can stably reset after the valve core loses the electromagnetic attraction force, thus improving the operational stability of the electric EGR valve.

[0008] Furthermore, the reset assembly includes a reset spring, one end of which is movably connected to an upper positioning rod, and one end of the upper positioning rod is fixedly connected to a limit plate. The surface of the limit plate has a central hole. There are four reset springs, which are distributed in a ring with equal spacing around the connecting rod. The reset springs can ensure the reset stability of the valve core body.

[0009] Furthermore, the sealing element is made of high-temperature resistant and wear-resistant sealing rubber. One end of the sealing element is provided with a sealing groove, and the bottom of the sealing groove is provided with a through hole. The sealing groove is horn-shaped. When the horn-shaped sealing groove contacts and is squeezed with the conical part, it can increase the sealing area and effect.

[0010] Furthermore, one end of the valve core body is provided with a tapered portion, a connecting rod is fixedly connected to the surface of the valve core body, and an adsorption block is fixedly connected to the other end of the connecting rod. The adsorption block is made of iron metal and can be adsorbed by electromagnetic adsorption force.

[0011] Furthermore, the other end of the return spring is movably connected to a lower positioning rod, which is coaxial with the upper positioning rod. One end of the lower positioning rod is fixedly connected to the surface of the valve core body. The lower positioning rod and the upper positioning rod not only facilitate the assembly of the return spring, but also prevent it from becoming skewed.

[0012] Furthermore, the seal is internally reinforced with a reinforcing sleeve made of elastic metal, which increases the seal's support strength and resistance to deformation.

[0013] Furthermore, an electromagnetic coil is provided inside the adsorption part, and the outer diameter of the adsorption part is smaller than the inner diameter of the through hole. The adsorption part can generate electromagnetic adsorption force after being energized.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) This solution increases the sealing area at one end of the valve core by using the tapered part of the valve core and the sealing groove of the sealing element, thereby greatly improving the sealing effect of the valve core.

[0016] (2) This solution, through the setting of reset spring, upper positioning rod, lower positioning rod, adsorption part and adsorption block, enables the valve core to move stably under the action of electromagnetic adsorption force, and can stably reset after the valve core loses electromagnetic adsorption force, thereby improving the stability of the electric EGR valve. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the valve body structure of this utility model;

[0019] Figure 3 for Figure 2 A schematic diagram of the reset structure;

[0020] Figure 4 for Figure 2 A cross-sectional view of the valve body structure;

[0021] Figure 5 This is a schematic diagram of the valve cover structure of this utility model.

[0022] Explanation of the labels in the diagram:

[0023] 1. Electric EGR valve body; 11. Valve cover; 12. Vent pipe; 13. Plug; 14. Adsorption section; 2. Valve body; 21. Valve chamber; 22. Connecting flange; 23. Fixing plate; 24. Through hole; 25. Seal; 26. Sealing groove; 27. Through hole; 28. Reinforcing sleeve; 3. Valve core body; 31. Conical part; 32. Connecting rod; 33. Adsorption block; 4. Reset assembly; 41. Reset spring; 42. Limiting plate; 43. Center hole; 44. Upper positioning rod; 45. Lower positioning rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 1-5 An electric EGR valve based on electromagnetic coil control includes an electric EGR valve body 1, which also includes a sensor assembly (existing technology). A plug 13, also existing technology, is located on the side of the electric EGR valve body 1, facilitating connection to an EGR system and automatically controlling its valve opening and closing (existing technology). An adsorption section 14 is located at the bottom of the electric EGR valve body 1, containing an electromagnetic coil (its structure and working principle are existing technology). The outer diameter of the adsorption section 14 is smaller than the inner diameter of the through hole 24. The adsorption section 14 generates electromagnetic adsorption force when energized. A valve cover 11 is fixedly mounted on the surface of the electric EGR valve body 1. A vent pipe 12 is located on the side of the valve cover 11, allowing the valve chamber 21 to communicate with the outside atmosphere. A valve body 2 is detachably connected to the bottom of the valve cover 11. A connecting flange 22 is fixedly connected to the surface of the valve body 2. The connecting flange 22 is bolted to an intake manifold. The intake manifold is coaxial with a through hole 27 and passes through the through hole. 27 and sealing groove 26 are connected to valve chamber 21. Valve chamber 21 is provided at one end of valve body 2. Fixed plate 23 is fixedly connected to the inner wall of valve chamber 21. Through hole 24 is opened in the middle of fixed plate 23. A sealing element 25 is detachably connected to the other end of valve body 2. Valve core body 3 is movably connected to one end of sealing element 25. Valve core body 3 is used to open and close the intake manifold passage. Reset assembly 4 is provided on the surface of valve core body 3. Reset assembly 4 includes reset spring 41. The four reset springs 41 will not change simultaneously. To reduce the size and elastic strength, one end of the return spring 41 is movably connected to the upper positioning rod 44, and one end of the upper positioning rod 44 is fixedly connected to the limit plate 42. The surface of the limit plate 42 is provided with a horn-shaped sealing sheet, which can be squeezed and sealed with the adsorption block 33. The surface of the limit plate 42 has a central hole 43, one end of which is horn-shaped. There are four return springs 41, which are distributed in a ring with equal spacing around the connecting rod 32. The return springs 41 can ensure the return stability of the valve core body 3.

[0026] The sealing element 25 is made of high-temperature and wear-resistant sealing rubber. One end of the sealing element 25 is provided with a sealing groove 26, and the bottom of the sealing groove 26 is provided with a through hole 27. The sealing groove 26 is shaped like a horn. When the horn-shaped sealing groove 26 contacts and is squeezed with the conical part 31, it can increase the sealing area and effect. One end of the valve core body 3 is provided with a conical part 31. A connecting rod 32 is fixedly connected to the surface of the valve core body 3. The other end of the connecting rod 32 is fixedly connected to an adsorption block 33. The adsorption block 33 is provided with a conical surface, which can seal upward with the limiting plate 42 to prevent air leakage between the intake manifold channel and the vent pipe 12 after the intake manifold channel is opened. The adsorption block 33 is made of iron metal and can be adsorbed by electromagnetic adsorption force.

[0027] The other end of the return spring 41 is movably connected to the lower positioning rod 45. The lower positioning rod 45 and the upper positioning rod 44 are coaxial. One end of the lower positioning rod 45 is fixedly connected to the surface of the valve core body 3. The lower positioning rod 45 and the upper positioning rod 44 not only facilitate the assembly of the return spring 41, but also prevent it from tilting. The sealing element 25 is internally fixedly reinforced with a reinforcing sleeve 28. The reinforcing sleeve 28 is made of elastic metal. The reinforcing sleeve 28 can increase the support strength and anti-deformation performance of the sealing element 25.

[0028] During operation, the electromagnetically controlled EGR valve generates an electromagnetic attraction force when the adsorption unit 14 is energized. This force causes the adsorption block 33 to move upward, which in turn moves the valve core body 3 upward. This upward movement of the valve core body 3 compresses the return spring 41, creating a compressive force. Simultaneously, the upward movement of the valve core body 3 causes the conical part 31 to disengage from the sealing groove 26, thus connecting the intake manifold to the valve chamber 21. When it is necessary to reduce the vacuum level of the valve chamber 21, the power supply to the adsorption unit 14 can be disconnected. In this case, the adsorption unit 14 loses its electromagnetic attraction force, causing the return spring 41 to release its elastic force. This force pushes the valve core body 3 downward to reset, causing the conical part 31 to contact and compress the sealing groove 26, sealing the intake manifold passage. At this time, the valve chamber 21 is connected to the external atmosphere through the vent pipe 12, and the vacuum level is reduced.

[0029] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. An electric EGR valve controlled by an electromagnetic coil, comprising an electric EGR valve body (1), wherein a plug (13) is provided on the side of the electric EGR valve body (1), characterized in that: The bottom of the electric EGR valve body (1) is provided with an adsorption part (14). A valve cover (11) is fixedly installed on the surface of the electric EGR valve body (1). A vent pipe (12) is provided on the side of the valve cover (11). A valve body (2) is detachably connected to the bottom of the valve cover (11). A connecting flange (22) is fixedly connected to the surface of the valve body (2). A valve chamber (21) is provided at one end of the valve body (2). A fixing plate (23) is fixedly connected to the inner wall of the valve chamber (21). A through hole (24) is opened in the middle of the fixing plate (23). A sealing element (25) is detachably connected to the other end of the valve body (2). A valve core body (3) is movably connected to one end of the sealing element (25). A reset component (4) is provided on the surface of the valve core body (3).

2. The electrically operated EGR valve based on electromagnetic coil control according to claim 1, characterized in that: The reset assembly (4) includes a reset spring (41), one end of which is movably connected to an upper positioning rod (44), and one end of the upper positioning rod (44) is fixedly connected to a limiting plate (42), and the surface of the limiting plate (42) has a central hole (43).

3. The electrically operated EGR valve based on electromagnetic coil control according to claim 1, characterized in that: The sealing element (25) is made of high temperature and wear resistant sealing rubber. One end of the sealing element (25) is provided with a sealing groove (26). The bottom of the sealing groove (26) is provided with a through hole (27). The sealing groove (26) is horn-shaped.

4. The electrically operated EGR valve based on electromagnetic coil control according to claim 1, characterized in that: One end of the valve core body (3) is provided with a tapered part (31), and a connecting rod (32) is fixedly connected to the surface of the valve core body (3). The other end of the connecting rod (32) is fixedly connected to an adsorption block (33).

5. The electrically operated EGR valve based on electromagnetic coil control according to claim 2, characterized in that: The other end of the return spring (41) is movably connected to the lower positioning rod (45), the lower positioning rod (45) and the upper positioning rod (44) are coaxial, and one end of the lower positioning rod (45) is fixedly connected to the surface of the valve core body (3).

6. The electrically operated EGR valve based on electromagnetic coil control according to claim 3, characterized in that: The seal (25) is internally fixed with a reinforcing sleeve (28), which is made of elastic metal.

7. The electrically operated EGR valve based on electromagnetic coil control according to claim 1, characterized in that: An electromagnetic coil is provided inside the adsorption part (14), and the outer diameter of the adsorption part (14) is smaller than the inner diameter of the through hole (24).

Images