Shock absorber with single adjustable damping valve and control method

Abstract

The invention relates to the technical field of vehicle control, and provides a single adjustable damping valve shock absorber which comprises a liquid storage cylinder, a first valve block and a second valve block are oppositely arranged on the side walls of the two sides of the liquid storage cylinder, and the first valve block and the second valve block are connected with gear pumps correspondingly; an upper cavity and a lower cavity are formed in the liquid storage barrel, the upper cavity and the lower cavity are communicated through opening of a bottom valve, a working cylinder and a piston piece capable of moving in the working cylinder are arranged in the upper cavity, the piston piece divides the working cylinder into a recovery cavity and a compression cavity, a floating piston is arranged at the top in the lower cavity, and an energy storage device cavity is formed between the bottom valve and the floating piston; the first valve block internally comprises an electromagnetic valve set and a first electromagnetic valve annular cavity formed in the outer side of the circumferential direction of the electromagnetic valve set, and the second valve block internally comprises a switch electromagnetic valve. According to the scheme, complex pipelines are reduced, the stability of the shock absorber is improved, and the response speed and reliability of damping control are improved.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle control, and in particular to a single adjustable damping valve shock absorber and a control method thereof. Background Art

[0002] Active suspension system is an advanced suspension technology that can automatically adjust the stiffness and damping characteristics of the suspension according to different road conditions and vehicle speeds, so that the suspension system is always in the best shock absorption state. Compared with the traditional passive suspension system, it can provide better handling and comfort. There are currently two main types of active suspension systems, one is series and the other is parallel. Among them, parallel active suspension is a common way to achieve active suspension control, which realizes real-time control of vibration damping by controlling the operating state of the oil pump.

[0003] In the prior art, the built-in airbag of the shock absorber acts as an accumulator, the pipeline is complex and the cost is high, and the existing damping mode adjustment has limitations. Most of them require a gear pump, which reduces the response speed, efficiency and reliability of the damping adjustment and reduces the vehicle comfort. Summary of the invention

[0004] In order to solve the problems existing in the background technology, the present invention proposes a single adjustable damping valve shock absorber and a control method, which reduces complex piping, improves the stability of the shock absorber, and improves the response speed and reliability of the damping control.

[0005] To achieve the above object, the present invention adopts the following scheme: a single adjustable damping valve shock absorber, comprising a liquid storage cylinder, a first valve block and a second valve block are disposed on the side walls of both sides of the liquid storage cylinder, and the first valve block and the second valve block are respectively connected to a gear pump;

[0006] An upper chamber and a lower chamber are provided in the liquid storage cylinder, the upper chamber and the lower chamber are connected by opening a bottom valve, a working cylinder and a piston member movable in the working cylinder are provided in the upper chamber, the piston member divides the working cylinder into a recovery chamber arranged away from the lower chamber and a compression chamber arranged close to the lower chamber, the bottom valve is arranged at the bottom of the compression chamber, a floating piston is arranged at the top of the lower chamber, and an accumulator chamber is formed between the bottom valve and the floating piston;

[0007] The first valve block includes a solenoid valve group and a first solenoid valve ring cavity arranged along the circumferential outer side of the solenoid valve group, one end of the first solenoid valve ring cavity is connected with the recovery cavity, and the other end of the first solenoid valve ring cavity can be selectively connected with the solenoid valve group or the gear pump, and the solenoid valve group is connected with the energy accumulator cavity when it is opened; the second valve block includes a switching solenoid valve, one end of the second valve block is connected with the energy accumulator cavity through the opening of the switching solenoid valve, and the other end of the second valve block is connected to the gear pump.

[0008] Furthermore, an annular oil chamber is provided between the side wall of the liquid storage barrel and the working cylinder, a fourth through hole connected to the annular oil chamber is provided on the side wall of the recovery chamber, and a sealing ring is provided between the bottom of the annular oil chamber and the accumulator chamber.

[0009] Furthermore, a first through hole is provided on the side wall of the liquid storage cylinder above the sealing ring, and the first solenoid valve ring cavity is connected with the annular oil cavity through the first through hole; a second through hole is provided on the side wall of the liquid storage cylinder below the sealing ring, and the two-way valve is connected with the energy storage cavity through the second through hole; a third through hole is also provided on the side wall of the liquid storage cylinder below the sealing ring, and the switch solenoid valve is connected with the energy storage cavity through the third through hole.

[0010] Furthermore, the second valve block also includes a switch solenoid valve annular cavity communicated with the switch solenoid valve, and the switch solenoid valve annular cavity is arranged along the circumferential outer side of the switch solenoid valve.

[0011] Furthermore, the solenoid valve group includes a two-way valve and a first solenoid valve connected to the two-way valve.

[0012] Furthermore, the lower chamber below the floating piston is filled with gas.

[0013] A control method for a single adjustable damping valve shock absorber includes a second valve block wheel lifting mode, a second valve block wheel lowering mode, a first valve block compression damping mode, and a first valve block recovery damping mode:

[0014] The second valve block wheel lifting mode: when the switch solenoid valve is energized and the solenoid valve group is energized and closed, the shock absorber oil in the compression chamber enters the energy accumulator chamber through the bottom valve, and then the shock absorber oil enters the gear pump through the switch solenoid valve in the second valve block, enters the first solenoid valve ring chamber through the gear pump, and finally flows into the recovery chamber. The pressure in the recovery chamber increases, pushing the piston to move upward, realizing the active wheel lifting mode;

[0015] The second valve block gear lowering mode: when the switch solenoid valve is energized and the solenoid valve group is energized and closed, the shock absorber oil in the recovery chamber enters the first solenoid valve ring chamber in the first valve block, and then the shock absorber oil enters the switch solenoid valve of the second valve block through the gear pump, and then flows into the compression chamber through the accumulator chamber and the bottom valve. The pressure in the compression chamber increases, pushing the piston member downward to achieve the active gear lowering mode;

[0016] Compression damping mode of the first valve block: the switch solenoid valve is powered on and off, the solenoid valve group is powered on, and when the piston moves downward, the shock absorber oil in the compression chamber enters the accumulator chamber through the bottom valve, and then enters the solenoid valve group of the first valve block through the first solenoid valve annular chamber, and enters the recovery chamber to realize the compression damping mode;

[0017] The first valve block recovery damping mode: the switch solenoid valve is energized and closed, the solenoid valve group is energized, and when the piston moves upward, the shock absorber oil in the recovery chamber enters the first solenoid valve ring chamber of the first valve block, and then enters the solenoid valve group into the accumulator chamber, and enters the compression chamber through the bottom valve to realize the recovery damping mode.

[0018] Furthermore, the specific way of the flow of shock absorber oil between the first solenoid valve annular cavity and the restoration cavity is as follows: when in the second valve block wheel lifting mode and the first valve block compression damping mode, the shock absorber oil in the first solenoid valve annular cavity enters the first through hole, and enters the restoration cavity through the annular oil cavity and the fourth through hole in sequence; when in the second valve block wheel lowering mode and the first valve block restoration damping mode, the shock absorber oil in the restoration cavity passes through the fourth through hole and the annular oil cavity in sequence, and enters the first solenoid valve annular cavity through the first through hole.

[0019] Furthermore, in the restoring damping mode, when the shock absorber oil enters the electronic valve group from the first solenoid valve ring cavity, the opening size of the damping hole of the first solenoid valve is adjustable.

[0020] The beneficial effects of the present invention are as follows: first, the present invention adopts a solution of built-in floating piston, which has a simple structure and low cost. The double valve block adopts the structure of a switch solenoid valve and a solenoid valve group. On the one hand, the second valve block and the first solenoid valve ring cavity in the first valve block cooperate to complete active wheel lifting and lowering, which can effectively reduce bumps and vibrations, optimize the center of gravity distribution of the vehicle, and improve controllability and stability.

[0021] On the other hand, the restoring damping force and the compression damping force can be adjusted through the solenoid valve group in the first valve block. When performing the restoring damping mode and the compression damping mode, the entire adjustment process can be achieved by closing the switch solenoid valve without going through the gear pump. Since there is no need for oil circulation through the gear pump, the response speed is faster, the suspension movement can be better controlled, and the energy loss of the gear pump is saved, thereby improving the system efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Numbers in the figure: 1. Liquid storage cylinder; 101. Bottom valve; 102. Working cylinder; 103. Piston; 104. Piston rod; 105. Restoration chamber; 106. Compression chamber; 107. Floating piston; 108. Accumulator chamber; 109. Annular oil chamber; 110. Sealing ring; 111. Safety valve; 112. Oil seal guide; 113. Gas; 2. First valve block; 201. First solenoid valve annular chamber; 202. Two-way valve; 203. First solenoid valve; 3. Second valve block; 301. Switch solenoid valve; 302. Switch solenoid valve annular chamber; 4. Gear pump; 5. First through hole; 6. Second through hole; 7. Third through hole; 8. Fourth through hole. DETAILED DESCRIPTION

[0024] In order to make the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the given embodiment is only one implementation method and does not represent all embodiments.

[0025] Embodiment 1

[0026] Combination Figure 1 The present invention provides a single adjustable damping valve shock absorber, including a liquid storage cylinder 1, on the side walls of both sides of the liquid storage cylinder 1 are relatively provided with a first valve block 2 and a second valve block 3, the first valve block 2 and the second valve block 3 are respectively connected to a gear pump 4.

[0027] The liquid storage cylinder 1 is provided with an upper chamber and a lower chamber, and the upper chamber and the lower chamber are connected by opening the bottom valve 101. The upper chamber is provided with a working cylinder 102 and a piston member movable in the working cylinder 102, and the piston member divides the working cylinder 102 into a restoring chamber 105 arranged away from the lower chamber and a compression chamber 106 arranged close to the lower chamber. The bottom valve 101 is arranged at the bottom of the compression chamber 106, and a floating piston 107 is arranged at the top of the lower chamber, and an accumulator chamber 108 is formed between the bottom valve 101 and the floating piston 107. This embodiment adopts a shock absorber solution with a built-in floating piston 107, which has a simple structure and low cost, and adopts a double valve block to realize the adjustment of active wheel lifting, active wheel lowering, compression damping force and restoring damping force.

[0028] The first valve block 2 includes a solenoid valve group and a first solenoid valve annular cavity 201 arranged along the circumferential outer side of the solenoid valve group. One end of the first solenoid valve annular cavity 201 is connected to the recovery cavity 105, and the other end of the first solenoid valve annular cavity 201 can be selectively connected to the solenoid valve group or the gear pump 4. When the solenoid valve group is opened, it is connected to the energy storage cavity 108. The second valve block 3 includes a switch solenoid valve 301. One end of the second valve block 3 is connected to the energy storage cavity 108 through the opening of the switch solenoid valve 301, and the other end of the second valve block 3 is connected to the gear pump 4. The double valve block of this embodiment adopts the structural form of a switch solenoid valve and a solenoid valve group. The solenoid valve group is opened, the switch solenoid valve 301 is closed, and the first solenoid valve annular cavity 201 is connected to the solenoid valve group to realize compression damping adjustment and recovery damping adjustment. When the solenoid valve group is closed, the switch solenoid valve 301 is opened, and the first solenoid valve annular cavity 201 is connected to the gear pump 4, it can cooperate with the second valve block 3 to realize active wheel lowering and active wheel lifting control.

[0029] On the other hand, when performing the recovery damping mode and the compression damping mode, the entire adjustment process can be achieved without going through the gear pump 4 by closing the switch solenoid valve 301. Since there is no need for oil circulation through the gear pump 4, the response speed is faster, the suspension movement can be better controlled, and the energy loss of the gear pump 4 is saved, thereby improving the system efficiency.

[0030] Specifically, an annular oil chamber 109 is provided between the side wall of the liquid storage barrel 1 and the working cylinder 102, a fourth through hole 8 communicating with the annular oil chamber 109 is provided on the side wall of the recovery chamber 105, and a sealing ring 110 is provided between the bottom of the annular oil chamber 109 and the accumulator chamber 108. The shock absorber oil in the recovery chamber 105 can enter the annular oil chamber 109 through the fourth through hole 8, thereby facilitating the mutual flow of the shock absorber oil in the recovery chamber 105 and the first solenoid valve annular chamber 201. The sealing ring 110 is used to isolate the recovery chamber 105 from the accumulator chamber 108.

[0031] Specifically, the solenoid valve group in this embodiment includes a two-way valve 202 and a first solenoid valve 203 connected to the two-way valve 202. The first solenoid valve 203 in this embodiment is a CDC solenoid valve. The working principle of the CDC solenoid valve is to change the cross-sectional area of ​​the connecting part between the two chambers through an electronically controlled valve, thereby changing the resistance of the oil to reciprocate between the chambers, thereby changing the damping of the shock absorber. In the recovery damping mode, when the shock absorber oil enters the electronic valve group from the first solenoid valve annular cavity 201, the first solenoid valve 203 can determine the size of the damping hole of the first solenoid valve 203 in advance according to an algorithm or experience. A first through hole 5 is provided on the side wall of the liquid storage cylinder 1 above the sealing ring 110, and the first solenoid valve annular cavity 201 is connected with the recovery cavity 105 through the first through hole 5 and the annular oil cavity 109 in sequence. A second through hole 6 is provided on the side wall of the liquid storage cylinder 1 below the sealing ring 110, and the two-way valve 202 is connected with the energy accumulator cavity 108 through the second through hole 6. A third through hole 7 is also provided on the side wall of the liquid storage cylinder 1 below the sealing ring 110, and the switch solenoid valve 301 is connected with the energy accumulator cavity 108 through the third through hole 7.

[0032] Specifically, the piston member includes a piston 103 and a piston rod 104. One end of the piston rod 104 is arranged outside the liquid storage cylinder 1, and the other end of the piston rod 104 is inserted into the working cylinder 102 and fixedly connected to the piston 103. A safety valve 111 is arranged on the piston 103, and an oil seal guide 112 is also arranged on the top of the liquid storage cylinder 1. The safety valve 111 is used to limit the pressure of the compression chamber 106 and the recovery chamber 105. The lower chamber is located below the floating piston 107 and is filled with gas 113. As a preferred gas 113, high-pressure nitrogen is selected to provide a stable pressure for the internal space of the shock absorber, thereby ensuring that the shock absorber works better. The second valve block 3 also includes a switch solenoid valve ring chamber 302 connected to the switch solenoid valve 301, and the switch solenoid valve ring chamber 302 is arranged along the circumferential outer side of the switch solenoid valve 301. When the shock absorber oil enters the second valve block 3, the switch solenoid valve ring chamber 302 can be used as a buffer space to make the shock absorber oil flow more stable.

[0033] Embodiment 2

[0034] The present embodiment provides a control method for a single adjustable damping valve shock absorber, including a second valve block wheel lifting mode, a second valve block wheel lowering mode, a first valve block compression damping mode and a first valve block recovery damping mode. The present embodiment mainly adopts the solenoid valve group and the first solenoid valve annular cavity 201 of the first valve block to realize the circulation of shock absorber oil between the liquid storage cylinder 1, thereby realizing the compression damping mode and the recovery damping mode. During this process, the switch solenoid valve 301 of the second valve block is closed; in addition, the active wheel lifting mode and the recovery damping mode are realized mainly by the cooperation of the switch solenoid valve 301 of the second valve block, the first solenoid valve annular cavity 201 of the first valve block and the gear pump 4 to realize the circulation of shock absorber oil between the liquid storage cylinder 1. During this process, the solenoid valve group of the first valve block is closed, as follows:

[0035] The second valve block wheel lifting mode: when working, the switch solenoid valve 301 is energized, the first solenoid valve 203 is energized and closed, the shock absorber oil in the compression chamber 106 enters the accumulator chamber 108 through the bottom valve 101, and then the shock absorber oil enters the second valve block 3 through the third through hole 7, enters the switch solenoid valve 301 and the switch solenoid valve annular chamber 302 in the second valve block 3 in turn, and then flows into the gear pump 4, and then flows into the first valve block 2 through the gear pump 4, and enters the liquid storage cylinder 1 through the first solenoid valve annular chamber 201 in the first valve block 2 through the first through hole 5, and finally flows into the recovery chamber 105 through the annular oil chamber 109 and the fourth through hole 8 in the liquid storage cylinder 1, the pressure in the recovery chamber 105 increases, pushing the piston to move upward, and realizing the active wheel lifting mode.

[0036] The second valve block gear lowering mode: when working, the switch solenoid valve 301 is energized, the first solenoid valve 203 is energized and closed, the shock absorber oil in the recovery chamber 105 enters the first valve block 2 through the fourth through hole 8, the annular oil chamber 109 and the first through hole 5 in turn, enters the gear pump 4 through the first solenoid valve annular chamber 201 in the first valve block 2, and then flows into the second valve block 3 through the gear pump 4. In the second valve block 3, it passes through the switch solenoid valve annular chamber 302 and the switch solenoid valve 301 through the third through hole 7 to enter the accumulator chamber 108, and finally flows into the compression chamber 106 through the bottom valve 101. The pressure in the compression chamber 106 increases, pushing the piston member downward to achieve the active gear lowering mode.

[0037] The first valve block compression damping mode: when working, the switch solenoid valve 301 is powered on and closed, the first solenoid valve 203 is powered on, the PWM control is in the damping state required by the system, the piston 103 and the piston rod 104 move downward, the shock absorber oil in the compression chamber 106 enters the energy storage chamber 108 through the bottom valve 101, and then the shock absorber oil enters the first valve block 2 through the second through hole 6, and enters the two-way valve 202, the first solenoid valve 203, the first solenoid valve annular chamber 201 in the first valve block 2, and then enters the liquid storage cylinder 1 through the first through hole 5, and passes through the annular oil chamber 109 and the fourth through hole 8 in the liquid storage cylinder 1, and finally enters the recovery chamber 105, realizing the compression damping mode. In this process, the shock absorber oil does not need to circulate the oil through the gear pump 4, the response speed is faster, the suspension movement can be better controlled, and the energy loss of the gear pump 4 is saved, which improves the system efficiency.

[0038] The first valve block recovery damping mode: when working, the switch solenoid valve 301 is powered on and closed, the first solenoid valve 203 is powered on, the PWM control is in the damping state required by the system, the piston 103 and the piston rod 104 move upward, and the shock absorber oil in the recovery chamber 105 enters the first valve block 2 through the fourth through hole 8, the annular oil chamber 109 and the first through hole 5 in turn, and enters the first solenoid valve annular chamber 201, the first solenoid valve 203, the two-way valve 202 in the first valve block 2, and then enters the accumulator chamber 108 through the second through hole 6, and finally enters the compression chamber 106 through the bottom valve 101, realizing the recovery damping mode. In this process, the shock absorber oil is also only circulated through the first valve block 2, which also saves the energy loss of the gear pump 4. Moreover, when current is passed through the first solenoid valve 203, the internal flow hole of the first solenoid valve 203 changes, and the flow rate of the shock absorber oil changes, thereby changing the magnitude of the damping force. Preferably, the size of the damping hole of the first solenoid valve 203 can be determined according to an algorithm to achieve more precise regulation.

[0039] The specific embodiments of the invention are described in detail above with reference to the drawings, but the invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the invention, and still fall within the scope of protection of the invention.

Claims

1. A single adjustable damping valve shock absorber, characterized in that: It comprises a liquid storage cylinder (1), wherein a first valve block (2) and a second valve block (3) are arranged on the side walls of both sides of the liquid storage cylinder (1) in opposite directions, and the first valve block (2) and the second valve block (3) are respectively connected to a gear pump (4); The liquid storage cylinder (1) is provided with an upper chamber and a lower chamber, the upper chamber and the lower chamber are connected by opening a bottom valve (101), the upper chamber is provided with a working cylinder (102) and a piston member movable in the working cylinder (102), the piston member divides the working cylinder (102) into a recovery chamber (105) arranged away from the lower chamber and a compression chamber (106) arranged close to the lower chamber, the bottom valve (101) is arranged at the bottom of the compression chamber (106), the top of the lower chamber is provided with a floating piston (107), and an accumulator chamber (108) is formed between the bottom valve (101) and the floating piston (107); The first valve block (2) includes a solenoid valve group and a first solenoid valve annular cavity (201) arranged along the circumferential outer side of the solenoid valve group, one end of the first solenoid valve annular cavity (201) is connected to the recovery cavity (105), and the other end of the first solenoid valve annular cavity (201) can be selectively connected to the solenoid valve group or the gear pump (4), and the solenoid valve group is connected to the energy storage cavity (108) when it is opened; the second valve block (3) includes a switch solenoid valve (301), one end of the second valve block (3) is connected to the energy storage cavity (108) by opening the switch solenoid valve (301), and the other end of the second valve block (3) is connected to the gear pump (4).

2. A single adjustable damping valve shock absorber according to claim 1, characterized in that: An annular oil chamber (109) is provided between the side wall of the liquid storage barrel (1) and the working cylinder (102), a fourth through hole (8) connected to the annular oil chamber (109) is provided on the side wall of the recovery chamber (105), and a sealing ring (110) is provided between the bottom of the annular oil chamber (109) and the accumulator chamber (108).

3. A single adjustable damping valve shock absorber according to claim 2, characterized in that: A first through hole (5) is provided on the side wall of the liquid storage cylinder (1) above the sealing ring (110), and the first electromagnetic valve annular cavity (201) is connected to the annular oil cavity (109) through the first through hole (5). A second through hole (6) is provided on the side wall of the liquid storage cylinder (1) below the sealing ring (110), and the two-way valve (202) is connected to the energy storage cavity (108) through the second through hole (6). A third through hole (7) is also provided on the side wall of the liquid storage cylinder (1) below the sealing ring (110), and the switch electromagnetic valve (301) is connected to the energy storage cavity (108) through the third through hole (7).

4. The single adjustable damping valve shock absorber according to claim 1, characterized in that: The second valve block (3) further comprises a switch solenoid valve annular cavity (302) which is in communication with the switch solenoid valve (301); the switch solenoid valve annular cavity (302) is arranged along the circumferential outer side of the switch solenoid valve (301).

5. The single adjustable damping valve shock absorber according to claim 1, characterized in that: The solenoid valve group comprises a two-way valve (202) and a first solenoid valve (203) connected to the two-way valve (202).

6. The single adjustable damping valve shock absorber according to claim 1, characterized in that: The piston member comprises a piston (103) and a piston rod (104); one end of the piston rod (104) is arranged outside the liquid storage cylinder (1); the other end of the piston rod (104) is inserted into the working cylinder (102) and is fixedly connected to the piston (103); a safety valve (111) is provided on the piston (103); and an oil seal guide (112) is also provided at the top of the liquid storage cylinder (1).

7. The single adjustable damping valve shock absorber according to claim 1, characterized in that: The lower chamber is located below the floating piston (107) and is filled with gas (113).

8. A control method for a single adjustable damping valve shock absorber according to any one of claims 1 to 7, characterized in that: It includes the second valve block wheel lifting mode, the second valve block wheel lowering mode, the first valve block compression damping mode and the first valve block recovery damping mode: Second valve block wheel lifting mode: when the switch solenoid valve (301) is energized and the solenoid valve group is energized and closed, the shock absorber oil in the compression chamber (106) enters the energy storage chamber (108) through the bottom valve (101), and then the shock absorber oil enters the gear pump (4) through the switch solenoid valve (301) in the second valve block (3), enters the first solenoid valve ring chamber (201) through the gear pump (4), and finally flows into the recovery chamber (105). The pressure in the recovery chamber (105) increases, pushing the piston member to move upward, thereby realizing the active wheel lifting mode; The second valve block gear lowering mode: when the switch solenoid valve (301) is energized and the solenoid valve group is energized and closed, the shock absorber oil in the recovery chamber (105) enters the first solenoid valve ring chamber (201) in the first valve block (2), and then the shock absorber oil enters the switch solenoid valve (301) of the second valve block (3) through the gear pump (4), and then flows into the compression chamber (106) through the bottom valve (101) via the accumulator chamber (108), the pressure in the compression chamber (106) increases, pushing the piston member to move downward, thereby realizing the active gear lowering mode; Compression damping mode of the first valve block: the switch solenoid valve (301) is powered on and closed, the solenoid valve group is powered on, and when the piston moves downward, the shock absorber oil in the compression chamber (106) enters the accumulator chamber (108) through the bottom valve (101), then enters the solenoid valve group of the first valve block (2) through the first solenoid valve annular chamber (201), and enters the recovery chamber (105), thereby realizing the compression damping mode; The first valve block recovery damping mode: the switch solenoid valve (301) is powered on and off, the solenoid valve group is powered on, and when the piston moves upward, the shock absorber oil in the recovery chamber (105) enters the first solenoid valve ring chamber (201) of the first valve block (2), then enters the solenoid valve group and enters the accumulator chamber (108), and enters the compression chamber (106) through the bottom valve (101), thereby realizing the recovery damping mode.

9. The control method of a single adjustable damping valve shock absorber according to claim 8, characterized in that: The specific manner in which the shock absorber oil flows between the first solenoid valve annular cavity (201) and the restoring cavity (105) is as follows: when in the second valve block wheel lifting mode and the first valve block compression damping mode, the shock absorber oil in the first solenoid valve annular cavity (201) enters the first through hole (5), and sequentially enters the restoring cavity (105) through the annular oil cavity (109) and the fourth through hole (8); when in the second valve block wheel lowering mode and the first valve block restoring damping mode, the shock absorber oil in the restoring cavity (105) sequentially passes through the fourth through hole (8) and the annular oil cavity (109), and enters the first solenoid valve annular cavity (201) through the first through hole (5).

10. The control method of a single adjustable damping valve shock absorber according to claim 8, characterized in that: In the restoring damping mode, when the shock absorber oil enters the electronic valve group from the first solenoid valve annular cavity (201), the opening size of the damping hole of the first solenoid valve (203) is adjustable.

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