Electromagnetic valve assembly for vehicle
By adopting threaded connection and spring force balance design, the high cost and complex installation problems of existing adjustable damping electromagnetic shock absorbers are solved, the detachability and interchangeability of parts are achieved, the performance and adaptability are improved, and the application of different models is facilitated.
Patent Information
- Application Number
- CN202422569455.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-10-23
AI Technical Summary
Existing adjustable damping electromagnetic shock absorbers have high production costs, are difficult to disassemble and replace, have large hysteresis, low durability, poor consistency in spring leaf stiffness, and poor stiffness forward design, resulting in great development difficulties and poor product stability.
Threaded connection is used to replace copper brazing and secondary plastic coating process. The design includes the internal hollow valve body, solenoid part, main valve sleeve, main valve seat, main valve core, pilot valve seat and pilot valve core. The balance of elastic force and electromagnetic force is achieved by using internal and external pilot springs and rigid spring pieces. The parts are detachable and interchangeable through threaded connection.
It reduces production costs, simplifies the installation process, improves the interchangeability and performance of parts, especially the hysteresis performance, adapts to the needs of different vehicle models, and facilitates product development.
Smart Images
Figure CN223360058U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of solenoid valves, in particular to a vehicle solenoid valve assembly. Background Art
[0002] The performance of the springs and shock absorbers in ordinary vehicle suspensions is essentially fixed after leaving the factory, and the "softness or hardness" cannot be actively adjusted. For ordinary shock absorbers, the damping coefficient is determined during the design and tuning stages, making it impossible to adjust while driving. To facilitate adjustments while driving, adjustable damping electromagnetic shock absorbers have emerged. They can actively adjust the "softness or hardness" of the vehicle suspension by changing the damping value of the shock absorber.
[0003] Existing adjustable damping electromagnetic shock absorbers not only require the use of damping plates with special material requirements, but also require integrated installation. Typically, the solenoid head is connected using copper brazing. After the coil is installed in the solenoid housing, it is then overmolded to achieve dust and water resistance. The hydraulic pilot valve uses a spring plate, and pressure regulation is achieved by adjusting the gap between the spring plate and the pilot valve seat through electromagnetic force. This solution results in high manufacturing costs, cumbersome disassembly and replacement, high hysteresis, low durability, poor spring plate stiffness consistency, difficulty controlling tolerances within a narrow range, and poor stiffness positive design, resulting in complex development and poor product stability. Therefore, improvements are necessary. Utility Model Content
[0004] The purpose of the utility model is to provide a vehicle solenoid valve assembly, which is conducive to parts replacement and easy installation, has strong parts interchangeability, and is convenient for developing products with new requirements; at the same time, it reduces costs, is easy to manufacture, and improves performance.
[0005] In order to achieve the purpose of this utility model, the first technical solution provided by the utility model is: a vehicle solenoid valve assembly, which includes a valve housing with a hollow interior, an electromagnetic part arranged at one end of the valve housing, a main valve sleeve arranged at the other end of the valve housing and with a hollow interior, a main valve seat connected to the bottom of the main valve sleeve and having a main valve port, a main valve core that cooperates with the main valve seat and is accommodated by the main valve sleeve, a pilot valve seat that is detachably connected to the main valve sleeve, and a pilot valve core that cooperates with the pilot valve seat.
[0006] On the basis of the above technical solution, the following subsidiary technical solutions are further included:
[0007] It also includes a main valve core spring located in the main valve sleeve and with its bottom end in contact with the main valve core, a pilot outer spring located on the main valve sleeve and sleeved on the outside of the pilot valve core, and a pilot inner spring located between the pilot valve seat and the pilot valve core.
[0008] The pilot inner spring is initially in a free state. When the pilot valve core is pressed downward, the pilot outer spring first provides elastic force to the pilot valve core, and then the pilot inner spring is added to provide elastic force to the pilot valve core together, thereby balancing the elastic force and the electromagnetic force.
[0009] The pilot valve core has a first working position axially closest to the main valve port, and a second working position axially farthest from the main valve port. When the pilot valve core is located at the first working position, the pilot inner spring is in a compressed state, and the pilot inner spring generates an axial force on the pilot valve core in the direction of the electromagnetic part, wherein when the pilot outer spring is in a compressed state, the pilot outer spring generates an axial force on the pilot valve core in the direction of the electromagnetic part; when the pilot valve core is located at the second working position, the pilot inner spring is in a natural state and does not generate any force on the pilot valve core, wherein the pilot outer spring is in a compressed state, and the pilot outer spring generates an axial force on the pilot valve core in the direction of the electromagnetic part.
[0010] It also includes a second rigid spring piece located between the pilot inner spring and the pilot valve seat. The second rigid spring piece is circumferentially provided with a first limiting structure, and the first limiting structure cooperates with the second limiting structure provided on the pilot valve seat to limit the second rigid spring piece in both the circumferential and axial directions.
[0011] The main valve sleeve includes a first valve sleeve cavity for accommodating the main valve core, and a second valve sleeve cavity for accommodating the pilot valve core, wherein the pilot valve seat passes through the second sleeve cavity and at least partially enters the first valve sleeve cavity, wherein the pilot valve seat includes a pilot valve seat cavity allowing the pilot valve core to be inserted therein, and a pilot valve seat body surrounding the pilot valve seat cavity and entering the first valve sleeve cavity.
[0012] The pilot valve core and the pilot valve seat are both provided with holes communicating with each other and are staggered in the axial direction.
[0013] The pilot valve core includes a valve core body and a pilot valve stem protruding axially downward from the valve core body, wherein a valve stem channel with an open bottom and an axial arrangement is provided inside the pilot valve stem, and the other end of the valve stem channel is opened on the pilot valve stem, wherein a plurality of valve stem holes connected to the valve stem channel are provided on the top of the pilot valve stem.
[0014] The pilot valve seat also includes a plurality of arcuate edges located at one end of the pilot valve seat body and arranged circumferentially at intervals and located in the second valve sleeve cavity, and a seat body edge connected to the bottom of each arcuate edge and on the same plane, wherein the circumferential side of the pilot valve seat body is provided with a plurality of pilot valve seat body holes that are connected to the pilot valve seat cavity and close to the bottom of the pilot valve stem, wherein the valve stem hole and the pilot valve seat body hole are staggered.
[0015] The bottom of the pilot valve stem is provided with a plurality of annular flanges, wherein a through hole connected with the valve stem channel is provided between two adjacent annular flanges, and the through hole is staggered with the pilot valve seat body hole.
[0016] The second rigid elastic sheet is placed on the edge of the seat body and is surrounded by an arc-shaped edge, and a flying wing is provided at the outer diameter of the second rigid elastic sheet.
[0017] Compared with the prior art, the present invention has the following positive effects:
[0018] It avoids the use of existing cumbersome manufacturing methods such as copper brazing process and secondary plastic coating, and the key parts of the pilot section use threaded connection, which is conducive to parts replacement and easy installation, solving problems such as installation troubles. The parts are highly interchangeable, which facilitates the development of products with new requirements; at the same time, costs are reduced, manufacturing is convenient, and performance is improved, especially the hysteresis performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0020] Figure 1 It is a three-dimensional diagram of the utility model;
[0021] Figure 2 This is a cross-sectional view of the present invention when the current in the coil is 0;
[0022] Figure 3 for Figure 2 A partial enlarged view of
[0023] Figure 4 This is a cross-sectional view of the present invention when the current in the coil is low;
[0024] Figure 5 This is a cross-sectional view of the present invention when the current in the coil is medium current;
[0025] Figure 6 This is a cross-sectional view of the present invention when the current in the coil is a large current;
[0026] Figure 7 This is a cross-sectional view of the present invention after adding a shock absorbing structure;
[0027] Figure 8 This is a three-dimensional diagram of the main valve sleeve in the present utility model at one viewing angle;
[0028] Figure 9 This is a three-dimensional diagram of the main valve sleeve in the present utility model from another perspective;
[0029] Figure 10 This is a three-dimensional diagram of the pilot valve seat in the present invention at one viewing angle;
[0030] Figure 11 This is a three-dimensional diagram of the pilot valve seat in the present invention from another perspective;
[0031] Figure 12 This is a three-dimensional diagram of the pilot valve core in the present invention at one viewing angle;
[0032] Figure 13 This is a three-dimensional diagram of the pilot valve core in the present invention from another perspective. DETAILED DESCRIPTION
[0033] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "front," "back," "left," "right," "top," "bottom," "inner," "outer," "front end," "back end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be construed as limiting the present invention. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0034] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model depending on the specific circumstances.
[0035] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.
[0036] Example: Figure 1-13As shown, the present invention discloses a specific embodiment of a vehicle solenoid valve assembly, which includes a valve housing 1000 fixed to a vehicle shock absorber and having a hollow interior, a solenoid portion 2000 disposed at one end of the valve housing 1000, a main valve sleeve 3000 disposed at the other end of the valve housing 1000 and having a hollow interior and an axial direction, a main valve seat 3400 matingly connected to the bottom of the main valve sleeve 3000 and having a main valve port 3420, a main valve core 3800 mating with the main valve seat 3400 and received by the main valve sleeve 3000, a pilot valve seat 4000 detachably connected to the main valve sleeve 3000 and at least partially inserted therein, and a pilot valve core 4400 mating axially with the pilot valve seat 4000. Thus, this embodiment as a whole includes a solenoid portion and a hydraulic portion, and the hydraulic portion includes a main valve and a pilot valve.
[0037] The valve housing 1000 is hollow inside, with the upper cavity being used to accommodate the electromagnetic part 2000 , and the lower cavity being used to accommodate the upper end of the main valve sleeve 3000 .
[0038] The solenoid unit 2000 includes a coil 5000 located within the valve housing 1000, a push rod assembly at least partially surrounded by the coil 5000, and a thin shell 2200 connected to the valve housing 1000 and located outside the coil 5000. The push rod assembly includes a sleeve 5200 surrounded by the coil 5000, a movable iron core 5400 located within the sleeve 5200, a push rod 5600 located at the bottom end of the movable iron core 5400, a stationary iron core 5800 fixed within the valve housing 1000 and at least partially contained within the sleeve 5200, a copper sleeve 5900 sleeved around the push rod 5600 and located within the stationary iron core 5800, a baffle 6200 located outside the top end of the sleeve 5200, and a magnetic isolation washer 6400 located within the sleeve 5200 and at the top end of the movable iron core 5400. The bottom of the sleeve 5200 is provided with multiple circumferential grooves to enhance sealing. The outer surface of the moving iron core 5400 is coated with a Teflon film 5700. This design utilizes an integrated assembly, with the moving iron core 5400 and the stationary iron core 5800 housed within a sleeve 5200. A Teflon film, providing magnetic isolation and lubrication, is positioned between the moving iron core 5400 and the inner wall of the sleeve 5200. The Teflon film has a smooth surface on one side (which contacts the moving iron core 5400) and a rough surface on the other side (which contacts the sleeve 5200). During assembly, the sleeve 5200 is pressed into the inner bore of the valve housing 1000. The sealing effect between the multiple circumferential grooves 5240 of the sleeve 5200 and the inner wall of the inner bore prevents oil from entering the coil and leaking outward. The moving iron core 5400 is used to push the push rod 5600 to perform reciprocating motion. The push rod 5600 contacts the pilot valve core 4400. The coil 5000 and the pipe sleeve 5200 are matched and installed into the upper end cavity of the valve housing 1000. Then, the coil 5000 and the valve housing 1000 are installed and riveted together through the thin shell 2200. A sealing ring is installed in the middle to meet the installation and sealing requirements.
[0039] The main valve sleeve 3000 is generally hollow and cylindrical, comprising a first sleeve cavity 3020 at the bottom that accommodates the main valve core 3800, a plurality of peripheral holes 3024 located around the sleeve and interconnected with the first sleeve cavity 3020, a second sleeve cavity 3040 at the top that accommodates the pilot valve core 4400, a notch 3042 communicating with the upper portion of the second sleeve cavity 3040, a main valve sleeve partition 3044 extending radially between the first and second sleeve cavities 3020 and 3040, and a main valve communication cavity 3060 that axially connects the first and second sleeve cavities 3020 and 3040 and passes through the center of the main valve sleeve partition 3044. The inner wall of the main valve communication cavity 3060 is internally threaded.
[0040] The main valve core 3800 includes a main valve core cavity 3820 therein and a main valve core hole 3840 communicating with the main valve core cavity 3820. The main valve core cavity 3820 at least partially accommodates the pilot valve seat 4000.
[0041] The pilot valve seat 4000 comprises a pilot valve seat cavity 4020, into which the pilot valve core 4400 is partially inserted axially; a cylindrical pilot valve seat body 4040 surrounding the pilot valve seat cavity 4020; a plurality of circumferentially spaced arcuate edges 4060 located at the top of the pilot valve seat body 4040; a seat edge 4062 connected to the bottom of each arcuate edge 4060 and coplanar with the bottom; and at least one locking groove 4064 located between adjacent arcuate edges 4060. Several pilot valve seat holes 4042 are provided on the circumference of the pilot valve seat body 4040, near the bottom, to communicate with the pilot valve seat cavity 4020. The number of pilot valve seat holes 4042 can be increased or decreased to meet different pressure reduction requirements. The seat edge 4062 is spaced axially from the pilot valve seat cavity 4020. Each arcuate edge 4060 forms an annular shape perpendicular to the axial direction. The peripheral side of the pilot valve seat body 4040 is provided with an external thread that cooperates with the internal thread of the main valve communication cavity 3060, thereby realizing the linkage between the main valve and the pilot valve.
[0042] The pilot valve core 4400 has a T-shaped cross-section and includes a valve core body 4420 with a circular cross-section, a pilot valve stem 4440 extending axially downward from the valve core body 4420, and a valve core boss 4460 located at the bottom of the valve core body 4420 and outside the pilot valve stem 4440. The valve core body 4420 includes a central recess 4424 and a plurality of valve core body holes 4428 located outside the recess 4424. The pilot valve stem 4440 defines an open-bottomed, axially arranged valve stem passage 4442. The other end of the valve stem passage 4442 opens into the pilot valve stem 4440. The top of the pilot valve stem 4440 is provided with a plurality of valve stem holes 4444 that communicate with the valve stem passage 4442. Preferably, the bottom of the pilot valve stem 4440 is provided with one or more annular flanges, with one or more through-holes disposed between the plurality of annular flanges, communicating with the valve stem passage 4442. The annular flange is used to match the pressure reduction level requirements of the pilot chamber, and the outer diameters of multiple annular flanges are consistent. The pilot valve stem 4440 of the pilot valve core 4400 reciprocates within the pilot valve seat cavity 4020 to achieve hydraulic control of the pilot unit.
[0043] To ensure the sealing of this embodiment, a sealing ring 6600 is further included, which is located between the valve housing 1000 and the electromagnetic part 2000 and is adjacent to the inner side of the thin shell 2200 .
[0044] To ensure the reciprocating motion of each component, the system further includes a push rod spring 7200 located between the push rod 5600 and the stationary iron core 5800; a main valve core spring 7400 located within the main valve housing 3000, its bottom end abutting against the main valve core 3800; a pilot outer spring 7600 located within the main valve housing 3000 and sleeved around the outside of the pilot valve core 4400; and a pilot inner spring 7800 located between the pilot valve seat 4000 and the pilot valve core 4400. The pilot outer spring 7600 is installed between the main valve housing partition 3044 and the valve core body 4420 of the pilot valve core 4400, sleeved around the outside of the curved edge 4060. Under the force of the pilot outer spring 7600, the pilot valve core 4400 is pressed against the bottom of the stationary iron core 5800.
[0045] To further enhance the elastic effect, the valve body further includes a first rigid spring piece 8200 located within the main valve core cavity and a second rigid spring piece 8400 located at the bottom end of the pilot inner spring 7800. The second rigid spring piece 8400 is positioned on the seat edge 4062 and surrounded by the curved edge 4060, allowing it to contact the valve core boss 4460 of the pilot valve core 4400. The second rigid spring piece 8400 has two wings on its outer diameter for mounting within the pilot valve seat slot. Its shape is variable, allowing for adjustments to the center hollow shape or additional hollowing to be added based on desired rigidity. The first rigid spring piece 8200 is preferably located between the top end of the main valve core spring 7400 and the inner wall of the main valve sleeve 3000.
[0046] During operation, the hydraulic part is composed of the main valve part and the pilot part. The notch 3042 of the main valve sleeve 3000 and the flat part on the side serve as the opening of the pilot part. If the pressure of the hydraulic part is high, oscillation pulses may occur. A oscillation absorption structure can be installed, such as Figure 7 As shown, an overflow hole 3060 is added to the side flattened portion, communicating with the second valve sleeve cavity 3040. A valve disc 8620, a valve spring 8640 with one end positioned on one side of the valve disc and elastically supported, and a locking pin 8660 located at the other end of the valve spring 8640 are mounted within the overflow hole 3060. Because the upper end surface of the pilot valve core 4400 contacts the bottom of the static iron core 5800, closing the pilot opening, the coil 5000 is energized to open the pilot opening. The peripheral hole 3024 of the main valve sleeve 3000 serves as the outlet of the main valve sleeve 3000. The contact surface between the main valve core 3800 and the main valve seat 3400 is located at the outlet. When the main valve core 3800 opens, the bottom of the main valve core 3800 separates from the contact surface on the upper surface of the main valve seat 3400, opening the outlet of the main valve sleeve 3000. The main valve port 3420 of the main valve seat 3400 serves as the inlet, where pressure is applied, referred to as P1. The main valve core 3800 has a main valve core hole 3840 at its base. The upper end of the main valve seat 3400 contacts the lower end of the main valve core 3800 at the outlet of the main valve sleeve. The pilot valve seat 4000 has a pilot valve seat cavity 4020 at its center, where the pilot valve core 4400 reciprocates. Pilot valve seat holes 4042 are located around the periphery of the pilot valve seat 4000. The bottom of the pilot valve core 4400 radially mates with these holes, forming a pilot flow control mechanism. There is a second rigid spring piece 8400 on the pilot valve seat 4000. After the second rigid spring piece 8400 is installed in the pilot valve seat 4000, it is locked in position. The arc edge 4060 on the pilot valve seat 4000 forms a guide sleeve, and a pilot inner spring 7800 is installed in the middle. The pilot inner spring 7800 does not initially contact the pilot valve core 4400. When the pilot valve core 4400 opens and moves a distance, it begins to compress, forming a spring force. A pilot outer spring 760 is installed between the pilot valve seat 4000 and the main valve sleeve 3000. 0, more specifically, it is installed between the upper surface of the main valve sleeve partition 3044 and the lower surface of the valve core body 4420. The pilot outer spring 7600 has a very low stiffness. In the initial position, the spring force is upward, pushing the top surface of the pilot valve core 4400 to fit the lower end surface of the static iron core 5800. When they fit together, the pilot valve opening is closed. When the coil 5000 is energized, the movable iron core 5400 moves downward, pushing the pilot valve stem 4440, which in turn pushes the pilot valve core 4400 downward. The pilot valve core 4400 moves downward, and the opening of the pilot portion opens. Depending on the current in the coil 5000, the corresponding working process is as follows:
[0047] 1) 0 current: The opening of the pilot part is closed, and the main valve core 3800 overcomes the pressure difference and the main valve core spring 7400 to open the outlet of the main valve sleeve 3000, that is, the main valve port 3420 of the main valve seat 3400 serves as the inlet, and the main valve sleeve peripheral hole 3024 of the main valve sleeve 3000 serves as the outlet. Figure 2-3 As shown;
[0048] 2) Small current: After power is supplied, the moving iron core 5400 overcomes the pilot external spring force 7600 and moves downward, the pilot opening A2 opens, the hydraulic oil flows from A2 to A, the pilot valve cavity pressure is released from A2, the upper and lower pressure difference of the main valve core hole 3840 decreases, when the pressure overcomes the main valve core spring 7400, the main valve core 3800 opens and opens to the maximum, the hydraulic oil flows from A1 to A; the flow rate of A1 port is larger than that of A2 port, the overall flow rate is the largest, and under the same flow input, the pressure at P1 port is the smallest, such as Figure 4 As shown;
[0049] 3) Medium current: The electromagnetic force becomes larger, the pilot valve core 4400 moves downward, compressing the pilot outer spring force 7600, and the pilot valve port A2 continues to open wider, but the valve core boss 4460 of the pilot valve core 4400 contacts the second rigid spring piece 8400, the flow rate of the pilot valve port A2 begins to decrease, the pressure relief weakens, the pressure in the main valve cavity increases, the opening of the main valve core 3800 decreases, the flow rate at the A1 port decreases, and the pressure at the P1 port increases. Figure 5 As shown;
[0050] 4) High current: The electromagnetic force is greater, the pilot valve core 4400 overcomes the pilot inner spring force and the elastic force of the second rigid spring piece 8400, and continues to press downward. The gap between the second rigid spring piece 8400 and the middle plane of the pilot valve seat decreases, the flow rate of the pilot valve A2 port continues to decrease, the pressure relief is weakest, the main valve cavity pressure is highest, the main valve core opening is minimum, the flow rate at A1 port is minimum, and the pressure at P1 port is maximum. Figure 6 shown.
[0051] The pilot valve seat in the hydraulic section utilizes a threaded mounting structure, facilitating part replacement and easy installation. Furthermore, the pilot valve core's external threads mate with the central threaded hole in the main valve sleeve, providing ample room for adjusting the pilot valve seat's depth. The pilot valve chamber entrance is circumferentially arranged around the pilot valve seat, allowing for adjustable hole size and number independent of displacement, resulting in ample adjustment. Furthermore, the pilot valve chamber entrance is not aligned with the main valve core hole 3840 to prevent hydraulic pressure shock. Furthermore, the pilot valve core's guide section in the pilot valve seat is adjustable in length. A pressure chamber is formed between the pilot valve core's central hole and the pilot valve seat. Small holes circumferentially surrounding the pilot valve core's central hole allow hydraulic oil to flow into the pressure chamber, preventing the pilot valve core from being unable to rebound due to excessive electromagnetic forces. The pressure chamber also effectively balances the forces acting on the pilot valve core. Between the pilot valve core and the pilot valve seat lies not only a pilot internal spring but also a pilot spring (a second rigid spring) for force balancing across various pressure ranges. The pilot valve core moves downward under the electromagnetic force, overcomes the force of the pilot outer spring and moves a certain distance, begins to compress the pilot inner spring, and finally moves downward, contacts the pilot spring sheet, overcomes the elastic force of the spring sheet and moves downward, causing the opening of the pilot valve port to decrease, thereby achieving a significant pressure reduction.
[0052] After adopting the above technical solution, the utility model has the following advantages: easy installation, strong adjustability of parts, which makes it easy for the same product to be suitable for different models, and strong interchangeability of parts, which facilitates the development of products with new needs; at the same time, the cost is reduced, the manufacturing is convenient, and the performance is improved, especially the hysteresis performance is improved.
[0053] The above are only preferred implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with this technical field can make several modifications and improvements without departing from the creative concept of the present invention, which should be included in the protection scope of the present invention.
Claims
1. A vehicle solenoid valve assembly, characterized in that It includes: A valve housing (1000) with a hollow interior, an electromagnetic part (2000) arranged at one end of the valve housing (1000), a main valve sleeve (3000) arranged at the other end of the valve housing (1000) and with a hollow interior, a main valve seat (3400) connected to the bottom of the main valve sleeve (3000) and having a main valve port (3420), a main valve core (3800) matched with the main valve seat (3400) and received by the main valve sleeve (3000), a pilot valve seat (4000) detachably connected to the main valve sleeve (3000), and a pilot valve core (4400) matched with the pilot valve seat (4000).
2. The vehicle solenoid valve assembly according to claim 1, characterized in that It also includes a main valve core spring (7400) located in the main valve sleeve (3000) and with one end in contact with the main valve core (3800), a pilot outer spring (7600) arranged between the main valve sleeve (3000) and the pilot valve core (4400), and a pilot inner spring (7800) arranged between the pilot valve seat (4000) and the pilot valve core (4400).
3. The vehicle solenoid valve assembly according to claim 2, characterized in that: The pilot valve core (4400) has a first working position axially closest to the main valve port (3420), and a second working position axially farthest from the main valve port (3420). When the pilot valve core (4400) is in the first working position, the pilot inner spring (7800) is in a compressed state, and the pilot inner spring (7800) generates an axial force on the pilot valve core (4400) in the direction of the electromagnetic part, wherein the pilot outer spring (7600) is in a compressed state. When the pilot outer spring (7600) is in the first working position, the pilot outer spring (7600) generates an axial force on the pilot valve core (4400) in the direction of the electromagnetic part; when the pilot valve core (4400) is in the second working position, the pilot inner spring (7800) is in the natural state and does not generate any force on the pilot valve core (4400), wherein the pilot outer spring (7600) is in the compressed state, and the pilot outer spring (7600) generates an axial force on the pilot valve core (4400) in the direction of the electromagnetic part.
4. The vehicle solenoid valve assembly according to claim 3, characterized in that It also includes a second rigid spring (8400) located between the pilot inner spring (7800) and the pilot valve seat (4000), and the second rigid spring is provided with a first limiting structure in the circumferential direction, and the first limiting structure cooperates with the second limiting structure provided on the pilot valve seat (4000) to limit the second rigid spring (8400) in both the circumferential and axial directions.
5. The vehicle solenoid valve assembly according to claim 4, characterized in that: The main valve sleeve (3000) includes a first valve sleeve cavity (3020) for accommodating a main valve core (3800), and a second valve sleeve cavity (3040) for accommodating a pilot valve core (4400), wherein the pilot valve seat (4000) passes through the second sleeve cavity (3040) and at least partially enters the first valve sleeve cavity (3020), wherein the pilot valve seat (4000) includes a pilot valve seat cavity (4020) for allowing the pilot valve core (4400) to be inserted therein, and a pilot valve seat body (4040) surrounding the pilot valve seat cavity (4020) and entering the first valve sleeve cavity (3020).
6. The vehicle solenoid valve assembly according to claim 5, characterized in that: The pilot valve core (4400) and the pilot valve seat (4000) are both provided with holes that are interconnected and are staggered in the axial direction.
7. The vehicle solenoid valve assembly according to claim 6, characterized in that: The pilot valve core (4400) includes a valve core body (4420) and a pilot valve stem (4440) that protrudes axially downward from the valve core body (4420), wherein the pilot valve stem (4440) is provided with a valve stem channel (4442) that is open at the bottom and arranged axially, and the other end of the valve stem channel (4442) is opened on the pilot valve stem (4440), wherein the top of the pilot valve stem (4440) is provided with a plurality of valve stem holes (4444) that are connected to the valve stem channel (4442).
8. The vehicle solenoid valve assembly according to claim 7, characterized in that: The pilot valve seat (4000) also includes a plurality of arcuate edges (4060) located at one end of the pilot valve seat body (4040) and arranged circumferentially at intervals and located in the second valve sleeve cavity (3040), and a seat body edge (4062) connected to the bottom of each arcuate edge (4060) and on the same plane, wherein the circumferential side of the pilot valve seat body (4040) is provided with a plurality of pilot valve seat body holes (4042) connected to the pilot valve seat cavity (4020) and close to the bottom of the pilot valve stem (4440), wherein the valve stem hole (4444) and the pilot valve seat body hole (4042) are staggered.
9. The vehicle solenoid valve assembly according to claim 7 or 8, characterized in that: The bottom of the pilot valve stem (4440) is provided with a plurality of annular flanges, wherein a through hole connected to the valve stem channel (4442) is provided between two adjacent annular flanges, and the through hole is staggered with the pilot valve seat body hole (4042).
10. The vehicle solenoid valve assembly according to claim 8, characterized in that: The second rigid spring piece (8400) is placed on the edge (4062) of the seat body and is surrounded by the arc-shaped edge (4060), and a flying wing is provided at the outer diameter of the second rigid spring piece (8400).