Adjustable full working condition damping electromagnetic valve
By designing the magnetic ring and iron core assembly, the solenoid valve can provide initial damping in a zero-current state and finely adjust the damping force under all operating conditions. This solves the shortcomings of traditional shock absorbers and solenoid valves, and improves the adaptability and ease of operation of the shock absorber.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JINTAN PUCHEN ELECTRONICS
- Filing Date
- 2026-04-21
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional shock absorbers have a fixed damping force, which cannot achieve the best damping effect under different road conditions. Furthermore, existing solenoid valves have complex structures or insufficient damping force in the zero-current state, affecting driving smoothness and safety.
The design employs a magnetic ring, a front iron core, and a rear iron core. The valve core force is controlled in stages by electromagnetic force. Combined with the independent response of the front and rear iron cores and the spring preload, the damping force is adjusted in stages and initial support is provided to ensure effective damping in the zero current state.
It broadens the damping adjustment range, improves adaptability to all working conditions, simplifies adjustment operations, enhances control accuracy and performance stability, and improves vehicle ride stability under low-speed or minor impact conditions.
Smart Images
Figure CN122083098B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of solenoid valves, and more particularly to an adjustable all-condition damping solenoid valve. Background Technology
[0002] Shock absorbers are widely used in various motor vehicles to reduce vibrations during driving. Traditional shock absorbers have a fixed damping force after production, which means that vehicles cannot achieve optimal damping performance under different road conditions. To address this, various adjustable damping shock absorbers have appeared on the market, but their adjustment mechanisms are usually quite complex, inconvenient to operate, and difficult to achieve rapid automatic adjustment.
[0003] In existing technologies, solenoid valves are commonly used to achieve electronically controlled damping adjustment. However, this type of solenoid valve adjustment scheme still has shortcomings. On the one hand, its structural design is often complex, resulting in an adjustment mechanism that is not simple or efficient enough; on the other hand, when the solenoid valve is in a zero-current state (i.e., not energized), the basic damping force it can provide is often too low. This results in the shock absorber lacking effective damping support in its default unenergized state, failing to meet the basic damping performance requirements of different driving conditions, thus affecting the overall ride comfort and safety of the ride. Summary of the Invention
[0004] To facilitate damping adjustment, this application provides an adjustable full-condition damping solenoid valve.
[0005] This application provides an adjustable, all-condition damping solenoid valve, which adopts the following technical solution: An adjustable full-condition damping solenoid valve includes a valve body and a valve core slidably disposed within the valve body, and also includes an electromagnet assembly. The electromagnet assembly includes a magnetic ring, a front iron core, and a rear iron core. The magnetic ring is fixed within the valve body, and the front iron core and the rear iron core are respectively disposed on opposite sides of the magnetic ring along the sliding direction of the valve core. The front and rear iron cores are configured to move toward the magnetic ring in stages during the process of the solenoid valve going from zero current to energized operation, so as to control the magnitude of the force acting on the valve core in stages.
[0006] Optionally, the electromagnet assembly further includes a coil and a push rod. The coil is located outside the magnetic ring, and the push rod slides through the magnetic ring along the sliding direction of the valve core. The front end of the push rod is provided with a pin for cooperating with the valve core.
[0007] Optionally, the rear iron core is fixedly connected to the top rod, and the front iron core is slidably sleeved on the outside of the top rod; and in the zero-current state when the coil is not energized, the first electromagnetic gap between the front iron core and the magnetic ring is smaller than the second electromagnetic gap between the rear iron core and the magnetic ring.
[0008] Optionally, it also includes a front spring and a rear spring, wherein the front spring abuts between the front iron core and the magnetic ring, and the rear spring abuts between the rear iron core and the magnetic ring.
[0009] Optionally, in the zero-current state where the coil is not energized, the preload of the front spring presses the ejector pin against the valve core through the front iron core.
[0010] Optionally, when the current flowing through the coil increases from zero but is less than the first threshold, the front iron core and the rear iron core remain in their initial positions, and the ejector pin acts on the valve core with an initial force. When the current flowing through the coil reaches and exceeds the first threshold but is less than the second threshold, the front iron core overcomes the elastic force of the front spring under the action of electromagnetic force and moves toward the guide magnetic ring, so that the force of the pin acting on the valve core begins to gradually decrease. When the current flowing through the coil reaches and exceeds the second threshold, the rear iron core overcomes the elastic force of the rear spring under the action of electromagnetic force and drives the push rod to move toward the guide magnetic ring, so that the force of the push pin acting on the valve core begins to gradually increase.
[0011] In summary, this application includes at least one of the following beneficial technical effects: 1. By using a magnetic ring, a front iron core, and a rear iron core, with the front and rear iron cores capable of moving in opposite directions in stages, non-monotonic, segmented, and precise control of the valve core force can be achieved. This allows the solenoid valve to output a force matching the operating conditions across its entire operating range, from zero current to high current. In particular, it provides effective initial damping even without energization, thus improving the insufficient support force of traditional solenoid valves at zero current, broadening the damping adjustment range, and enhancing adaptability to all operating conditions. Furthermore, fine adjustment via the control current simplifies damping adjustment operations, improving control accuracy and performance stability.
[0012] 2. By fixing the rear iron core to the push rod and sliding the front iron core onto the push rod, the front and rear iron cores can respond to electromagnetic forces independently, ensuring the structural basis for phased operation. By setting the first electromagnetic gap of the front iron core to be smaller than the second electromagnetic gap of the rear iron core, it is ensured that after energization, due to the smaller first electromagnetic gap and its lower magnetic resistance, the electromagnetic attraction at the front iron core will preferentially reach the threshold to overcome the preload of the front spring, thus acting before the rear iron core. This ensures that the front and rear iron cores operate according to the preset sequence, which helps improve product consistency.
[0013] 3. By setting the front spring, the valve core can be continuously subjected to the clamping force preset by the front spring even when the solenoid valve is in a zero current state, thereby providing a stable basic damping and effectively improving the support performance of the solenoid valve when it is not energized, thus improving the driving stability of the vehicle under low speed or minor impact conditions. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of an adjustable all-condition damping solenoid valve according to an embodiment of this application.
[0015] Figure 2 It is a graph showing the relationship between current I and output damping F in the embodiments of this application.
[0016] Explanation of reference numerals in the attached diagram: 1. Valve body; 2. Valve core; 3. Magnetic ring; 4. Coil; 5. Push rod; 51. Push pin; 6. Front iron core; 7. Rear iron core; 8. Front spring; 9. Rear spring. Detailed Implementation
[0017] The following combination Figure 1 and Figure 2 This application will be described in further detail below.
[0018] Example:
[0019] This application discloses an adjustable, all-condition damping solenoid valve. (Refer to...) Figure 1 An adjustable full-condition damping solenoid valve includes a valve body 1 and a valve core 2 slidably disposed within the valve body 1. It also includes an electromagnet assembly comprising a magnetic ring 3, a coil 4, a push rod 5, a front iron core 6, and a rear iron core 7. The magnetic ring 3 is fixed within the valve body 1; the coil 4 is arranged around the outside of the magnetic ring 3; the push rod 5 slides along the sliding direction of the valve core 2 and passes through the outside of the magnetic ring 3; a push pin 51 for engaging with the oil port of the valve core 2 is coaxially fixed at the front end of the push rod 5; the front iron core 6 and the rear iron core 7 are respectively disposed on opposite sides of the magnetic ring 3 along the sliding direction of the valve core 2.
[0020] During the process of the solenoid valve transitioning from zero current to energized operation, the front iron core 6 and the rear iron core 7 can move towards the guide magnetic ring 3 in stages, thereby controlling the magnitude of the force acting on the valve core 2 in segments. This achieves non-monotonic, segmented, and precise control of the force acting on the valve core 2, ensuring that the solenoid valve outputs a force matching the operating conditions throughout its entire operating range from zero current to working current. In particular, it provides effective initial damping even when not energized, thus improving the problem of insufficient support force in traditional solenoid valves at zero current, broadening the damping adjustment range, and enhancing adaptability to all operating conditions. Furthermore, fine adjustment via the control current simplifies damping adjustment operations, improving control accuracy and performance stability.
[0021] Reference Figure 1The rear iron core 7 is fixedly connected to the top rod 5, and the front iron core 6 is slidably sleeved on the outside of the top rod 5. When current is applied to the coil 4, the front iron core 6 and the rear iron core 7 can respond to electromagnetic forces independently, ensuring the structural basis for phased operation. In the zero-current state when the coil 4 is not energized, the first electromagnetic gap between the front iron core 6 and the magnetic ring 3 is smaller than the second electromagnetic gap between the rear iron core 7 and the magnetic ring 3. After energization, due to the small first electromagnetic gap and its low magnetic resistance, the electromagnetic attraction at the front iron core 6 will preferentially reach the threshold of overcoming the preload of the front spring 8, thus facilitating its action before the rear iron core 7. This helps to avoid disorder in the action sequence of the two, making the current-output damping curve prediction more accurate and improving product consistency. In this embodiment, the first electromagnetic gap is 0.65mm and the second electromagnetic gap is 1mm.
[0022] Reference Figure 1 To facilitate the reset of the front core 6 and rear core 7 to their initial positions under zero current conditions, the damping solenoid valve also includes a front spring 8 and a rear spring 9. The front spring 8 abuts against the front core 6 and the magnetic ring 3, and the rear spring 9 abuts against the rear core 7 and the magnetic ring 3. Furthermore, the front spring 8 and rear spring 9 also serve to buffer and smooth the movement, reducing the impact and noise when the front core 6 and rear core 7 engage.
[0023] Reference Figure 1 In the zero-current state where coil 4 is not energized, the magnetic ring 3, front spring 8, front iron core 6, ejector pin 51, and valve core 2 sequentially abut against each other. The preload of the front spring 8 presses the ejector pin 51 against the valve core 2 through the front iron core 6. In this way, even in the zero-current state, the solenoid valve can still output a stable initial damping, improving the applicability of the damping solenoid valve under various operating conditions.
[0024] Reference Figure 1 When the current I flowing through coil 4 increases from zero but is less than the first threshold I1, the front iron core 6 and the rear iron core 7 remain in their initial positions, and the ejector pin 51 acts on the valve core 2 with the initial force. When the current I flowing through coil 4 reaches and exceeds the first threshold I1, but is less than the second threshold I2, the front iron core 6 overcomes the elastic force of the front spring 8 under the action of electromagnetic force and moves toward the guide magnetic ring 3, so that the force of the pin 51 acting on the valve core 2 begins to gradually decrease. When the current flowing through coil 4 reaches and exceeds the second threshold I2, the rear iron core 7 overcomes the elastic force of the rear spring 9 under the action of electromagnetic force and drives the push rod 5 to move toward the guide magnetic ring 3, so that the force of the push pin 51 acting on the valve core 2 begins to gradually increase.
[0025] In this embodiment, the first threshold I1 is the current required for the electromagnetic force of the front iron core 6 to overcome the preload of the front spring 8; the second threshold I2 is the current required for the electromagnetic force of the rear iron core 7 to overcome the preload of the rear spring 9. Because the first electromagnetic gap of the front iron core 6 is smaller, its magnetic resistance is lower, and as the current increases from zero, the electromagnetic force at the front iron core 6 increases faster, making it easier for the front iron core 6 to act first. The sequential action of the front iron core 6 and the rear iron core 7 causes the force exerted by the ejector pin 51 on the valve core 2 to undergo a three-stage change process: maintaining the initial force, decreasing, and then increasing. This allows the solenoid valve to provide a complex output characteristic with a stage of initial support, a stage of force weakening, and a stage of force strengthening, thus expanding the dynamic range and adaptability of the damping adjustment.
[0026] The implementation principle of an adjustable full-condition damping solenoid valve in this application embodiment is as follows: when the solenoid valve is in a zero-current state, the preload of the front spring 8 continuously presses the ejector pin 51 onto the valve core 2 through the front iron core 6, so that the ejector pin 51 acts on the valve core 2 with an initial force, which is manifested as the solenoid valve outputting an initial damping as a basic support.
[0027] When the current flowing through coil 4 increases from zero but does not reach the first threshold, both the front iron core 6 and the rear iron core 7 remain in their initial positions, maintaining the initial damping of the solenoid valve output. When the current reaches and exceeds the first threshold but is less than the second threshold, the electromagnetic attraction generated by the smaller first electromagnetic gap between the front iron core 6 and the magnetic ring 3 first overcomes the preload of the front spring 8, driving the front iron core 6 towards the magnetic ring 3. This process compresses the front spring 8, causing the force exerted by the ejector pin 51 on the valve core 2 to gradually decrease, thereby gradually reducing the output damping. When the current further increases to exceed the second threshold, the electromagnetic attraction generated by the rear iron core 7 overcomes the elastic force of the rear spring 9, starting to drive the ejector rod 5 to move towards the magnetic ring 3. At this time, the force exerted by the ejector pin 51 on the valve core 2 gradually increases, thus achieving a further increase in output damping.
[0028] The output damping of this damping solenoid valve exhibits a non-monotonic, three-stage continuously adjustable characteristic, adapting to changes in a single control current. The reliable preload of the front spring 8 ensures the basic support performance of the solenoid valve in a zero-current state; a wide range of damping adjustment can be achieved with a simple current signal, simplifying the adjustment operation and enabling precise damping adjustment across the entire range from zero current to operating current.
[0029] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An adjustable full-condition damping solenoid valve, comprising a valve body (1) and a valve core (2) slidably disposed within the valve body (1), characterized in that: It also includes an electromagnet assembly, which includes a magnetic ring (3), a front iron core (6) and a rear iron core (7). The magnetic ring (3) is fixed inside the valve body (1), and the front iron core (6) and the rear iron core (7) are respectively arranged on opposite sides of the magnetic ring (3) along the sliding direction of the valve core (2). The front core (6) and the rear core (7) are configured to move toward the magnetic ring (3) in stages during the process of the solenoid valve going from zero current to energized operation, so as to control the magnitude of the force acting on the valve core (2) in stages. The electromagnet assembly also includes a coil (4) and a push rod (5). The coil (4) is located outside the magnetic ring (3). The push rod (5) slides through the magnetic ring (3) along the sliding direction of the valve core (2). The front end of the push rod (5) is provided with a push pin (51) for cooperating with the valve core (2). The rear iron core (7) is fixedly connected to the push rod (5). The front iron core (6) is slidably sleeved on the outside of the push rod (5). In the zero-current state when the coil (4) is not energized, the first electromagnetic gap between the front iron core (6) and the magnetic ring (3) is smaller than the second electromagnetic gap between the rear iron core (7) and the magnetic ring (3). It also includes a front spring (8) and a rear spring (9), the front spring (8) abutting between the front iron core (6) and the magnetic ring (3), and the rear spring (9) abutting between the rear iron core (7) and the magnetic ring (3); in the zero current state when the coil (4) is not energized, the preload of the front spring (8) presses the ejector pin (51) against the valve core (2) through the front iron core (6); When the current flowing through the coil (4) increases from zero but is less than the first threshold, the front iron core (6) and the rear iron core (7) remain in the initial position, and the pin (51) acts on the valve core (2) with the initial force. When the current flowing through the coil (4) reaches and exceeds the first threshold but is less than the second threshold, the front iron core (6) overcomes the elastic force of the front spring (8) under the action of electromagnetic force and moves toward the guide magnetic ring (3), so that the force of the pin (51) acting on the valve core (2) begins to gradually decrease. When the current flowing through the coil (4) reaches and exceeds the second threshold, the rear iron core (7) overcomes the elastic force of the rear spring (9) under the action of electromagnetic force and drives the push rod (5) to move together toward the guide magnetic ring (3), so that the force of the push pin (51) acting on the valve core (2) begins to gradually increase.