Double-valve control type full-active automobile suspension system

Abstract

The invention relates to the technical field of automobiles, in particular to a double-valve control type full-active automobile suspension system which comprises a shock absorber assembly, a hydraulic pump assembly, a compression electromagnetic valve and a recovery electromagnetic valve. The shock absorber assembly comprises a middle cylinder, a working cylinder and an oil storage cylinder, and an inner cavity of the working cylinder is a working cavity; a piston rod dividing the working cavity into an upper working cavity and a lower working cavity is arranged in the working cavity, the working cylinder is sleeved with the middle cylinder, a middle cavity is formed between the working cylinder and the middle cylinder, the middle cavity is communicated with the upper working cavity, the middle cylinder is sleeved with the oil storage cylinder, and an oil storage cavity is formed between the oil storage cylinder and the middle cylinder. An inlet and an outlet of the restoring electromagnetic valve are respectively communicated with the middle cavity and the oil storage cavity, the compression electromagnetic valve is fixed on the oil storage cylinder, and an inlet and an outlet of the compression electromagnetic valve are respectively communicated with the working lower cavity and the oil storage cavity. And a first oil port and a second oil port of the hydraulic pump assembly are respectively communicated with the middle cavity and the working lower cavity. The passive damping adjusting mode and the full-active damping adjusting mode are both considered, and the posture of the automobile body can be actively adjusted.

Description

Technical Field

[0001] The invention relates to the field of automobile technology, and in particular to a dual-valve controlled fully active automobile suspension system. Background Art

[0002] The automobile suspension system is a key factor in determining its ride smoothness and handling stability. A good suspension system must be able to effectively attenuate vibrations from different road surfaces while also improving the vehicle's handling stability.

[0003] At present, the existing patent announcement number CN117108673A discloses a dual-valve controlled semi-active shock absorber, which realizes continuous adjustment and control of the shock absorber's restoring damping force by changing the input current of the restoring solenoid valve and the throttling area of ​​the solenoid valve on the oil; and realizes continuous adjustment and control of the shock absorber's compression damping force by changing the input current of the compression solenoid valve and the throttling area of ​​the solenoid valve on the oil. However, it adopts a dual-valve control method to realize the damping adjustment in a passive or semi-active damping adjustment mode, and cannot take into account the full active damping adjustment mode, so it cannot actively adjust the vehicle body posture. Summary of the invention

[0004] One of the purposes of the present invention is to provide a dual-valve controlled fully active automobile suspension system, which aims to solve the technical problem that the existing automobile suspension system adopts dual-valve control to achieve damping adjustment in a passive or semi-active damping adjustment mode, and cannot take into account the fully active damping adjustment mode, thereby failing to actively adjust the automobile body posture.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a dual-valve controlled fully active automobile suspension system, including a shock absorber assembly, a hydraulic pump assembly, a hydraulic oil circuit, a compression solenoid valve and a restoring solenoid valve, the shock absorber assembly includes an intermediate cylinder, a working cylinder and an oil storage cylinder, the inner cavity of the working cylinder is a working cavity, a piston rod for adjusting the posture of the automobile is arranged in the working cavity, the piston rod divides the working cavity into an upper working cavity and a lower working cavity, the intermediate cylinder sleeve is arranged outside the working cylinder, an intermediate cavity is formed between the inner wall of the intermediate cylinder and the outer wall of the working cylinder, the intermediate cavity is communicated with the upper working cavity, the oil storage cylinder sleeve is arranged outside the intermediate cylinder, the inner wall of the oil storage cylinder is connected to the intermediate cylinder an oil storage chamber is formed between the outer walls of the oil storage cylinder, the restoring solenoid valve is fixed on the oil storage cylinder, the oil inlet and oil outlet of the restoring solenoid valve are communicated with the middle chamber and the oil storage chamber respectively, the compression solenoid valve is fixed on the oil storage cylinder, the oil inlet and oil outlet of the compression solenoid valve are communicated with the working lower chamber and the oil storage chamber respectively; the hydraulic pump assembly includes a bidirectional hydraulic pump and a drive unit, and the drive unit serves as a power unit of the bidirectional hydraulic pump; the hydraulic oil circuit includes a first oil circuit and a second oil circuit, the two ends of the first oil circuit are communicated with the middle chamber and the first oil port of the bidirectional hydraulic pump respectively, and the two ends of the second oil circuit are communicated with the working lower chamber and the second oil port of the bidirectional hydraulic pump respectively.

[0006] Furthermore, an accumulator is connected in parallel between the oil outlet of the recovery solenoid valve and the oil outlet of the compression solenoid valve.

[0007] Furthermore, the accumulator is fixed on the oil storage cylinder, and the accumulator is arranged in the oil storage cavity or outside the oil storage cavity.

[0008] Furthermore, when the accumulator is arranged in the oil storage chamber, the accumulator is an air bag accumulator.

[0009] Furthermore, when the accumulator is arranged outside the oil storage chamber, the accumulator is a bladder accumulator, a piston accumulator or a bellows accumulator.

[0010] Furthermore, a first pressure sensor is provided in the first oil circuit for detecting the oil pressure in the first oil circuit.

[0011] Furthermore, a second pressure sensor is provided in the second oil circuit for detecting the oil pressure in the second oil circuit.

[0012] Furthermore, the present invention also includes a first safety valve, an oil inlet of the first safety valve is connected to the first oil circuit, and an oil outlet of the first safety valve is connected to the second oil circuit.

[0013] Furthermore, the present invention also includes a second safety valve, an oil inlet of the second safety valve is communicated with the second oil circuit, and an oil outlet of the second safety valve is communicated with the first oil circuit.

[0014] Furthermore, one hydraulic pump assembly corresponds to one shock absorber assembly and one set of the hydraulic oil circuits.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] During the use of the present invention, first, if the piston rod of the shock absorber is passively damped, that is, the damping of the piston rod of the shock absorber is adjusted during the passive compression or recovery process (the process of the piston rod rising or the process of the piston rod returning to its original position after the compression process) of the shock absorber due to the bumps of the road during driving, the two-way hydraulic pump does not work, the recovery solenoid valve and the compression solenoid valve are energized to work, and when the piston rod is passively compressed, the hydraulic oil in the working lower chamber enters the compression solenoid valve and then enters the oil storage chamber, a part of the oil enters the accumulator, and then enters the middle chamber through the recovery solenoid valve, and finally enters the working upper chamber; when the piston rod recovers, the hydraulic oil in the working upper chamber enters the middle chamber and then enters the recovery solenoid valve, and then enters the oil storage chamber, and finally enters the working lower chamber through the compression solenoid valve, and the cycle is repeated to realize the passive damping adjustment function of the piston rod of the shock absorber.

[0017] Second, if the piston rod of the shock absorber is actively adjusted and the bidirectional hydraulic pump is working, under this working condition, when the piston rod of the shock absorber is actively lowered, the hydraulic oil enters the middle cavity from the bidirectional hydraulic pump through the first oil circuit and then enters the working upper cavity, while part of the hydraulic oil in the working lower cavity flows back to the bidirectional hydraulic pump through the second oil circuit, and part of it enters the accumulator through the compression solenoid valve; when the piston rod of the shock absorber is actively lifted, the hydraulic oil directly enters the working lower cavity from the bidirectional hydraulic pump through the second oil circuit, while the hydraulic oil in the working upper cavity flows back to the bidirectional hydraulic pump through the first oil circuit, and the oil in the accumulator enters the middle cavity through the recovery solenoid valve under the action of the pressure difference, and finally flows back to the bidirectional hydraulic pump, realizing the active lifting of the car body posture. In this cycle, the posture of the car body can be actively adjusted, thereby realizing the full active damping adjustment function of the piston rod of the shock absorber.

[0018] In summary, the dual-valve controlled fully active automobile suspension system of the present invention integrates the compression solenoid valve and the restoring solenoid valve on the shock absorber assembly, and can take into account both passive and fully active damping adjustment modes, and can actively adjust the automobile body posture, thereby overcoming the technical defects of the existing automobile suspension system that adopts dual-valve control to realize damping adjustment as passive or semi-active damping adjustment mode, cannot take into account the fully active damping adjustment mode, and thus cannot actively adjust the automobile body posture. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The schematic diagram of the compression process of the dual-valve controlled fully active automobile suspension system of the present invention;

[0020] Figure 2This is a schematic diagram of the restoration process of the dual-valve controlled fully active automobile suspension system of the present invention;

[0021] Figure 3 The present invention relates to a structural schematic diagram of an embodiment in which two shock absorber assemblies are respectively connected to two sets of hydraulic oil circuits and two bidirectional hydraulic pumps.

[0022] Reference numerals in the accompanying drawings:

[0023] 1. Shock absorber assembly; 11. Working cylinder; 110. Working upper chamber; 111. Working lower chamber; 112. Connecting hole; 12. Intermediate cylinder; 120. Intermediate chamber; 13. Oil storage cylinder; 130. Oil storage chamber; 14. Piston rod; 2. Compression solenoid valve; 3. Restoration solenoid valve; 4. First oil circuit; 41. Second oil circuit; 5. Bidirectional hydraulic pump; 50. Drive unit; 6. First pressure sensor; 61. Second pressure sensor; 7. First safety valve; 70. Second safety valve; 8. Accumulator. DETAILED DESCRIPTION

[0024] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0025] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as "width", "up", "down", "front", "back", "top" and "bottom" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] Please refer to Figure 1 - Figure 3 The present invention provides a dual-valve controlled fully active automobile suspension system, including a shock absorber assembly 1, a hydraulic pump assembly, a hydraulic oil circuit and a solenoid valve assembly.

[0029] Among them, the shock absorber assembly 1 includes a working cylinder 11, an intermediate cylinder 12 and an oil storage cylinder 13. The inner cavity of the working cylinder 11 is a working cavity, and a piston rod 14 for adjusting the posture of the vehicle is arranged in the working cavity. The piston rod 14 divides the working cavity into a working upper cavity 110 and a working lower cavity 111. The intermediate cylinder 12 is sleeved outside the working cylinder 11, and an intermediate cavity 120 is formed between the inner wall of the intermediate cylinder 12 and the outer wall of the working cylinder 11. A connecting hole 112 is opened on the outer wall of the working upper cavity 110, and the connecting hole 112 connects the working upper cavity 110 with the intermediate cavity 120, thereby realizing the connection between the intermediate cavity 120 and the working upper cavity 110; the oil storage cylinder 13 is sleeved outside the intermediate cylinder 12, and an oil storage cavity 130 is formed between the inner wall of the oil storage cylinder 13 and the outer wall of the intermediate cylinder 12.

[0030] The solenoid valve assembly includes a compression solenoid valve 2 and a restoring solenoid valve 3. The restoring solenoid valve 3 is fixed on the oil storage cylinder 13. The oil inlet and oil outlet of the restoring solenoid valve 3 are communicated with the middle cavity 120 and the oil storage cavity 130 respectively. The compression solenoid valve 2 is fixed on the oil storage cylinder 13. The oil inlet and oil outlet of the compression solenoid valve 2 are communicated with the working lower cavity 111 and the oil storage cavity 130 respectively. An accumulator 8 is connected in parallel between the oil outlet of the restoring solenoid valve 3 and the oil outlet of the compression solenoid valve 2.

[0031] The hydraulic pump assembly includes a bidirectional hydraulic pump 5 and a drive unit 50. The drive unit 50 includes a drive motor and a driver. The drive motor is controlled by the driver, and the drive unit 50 serves as a power unit of the bidirectional hydraulic pump 5. A set of hydraulic oil circuits includes a first oil circuit 4 and a second oil circuit 41. The two ends of the first oil circuit 4 are respectively connected to the middle cavity 120 and the first oil port of the bidirectional hydraulic pump 5. The two ends of the second oil circuit 41 are respectively connected to the working lower cavity 111 and the second oil port of the bidirectional hydraulic pump 5.

[0032] During the use of the dual-valve controlled fully active automobile suspension system of the present invention, in the first working condition (pure damping mode), if the piston rod 14 of the shock absorber is passively damped, that is, the piston rod 14 of the shock absorber is passively compressed or restored due to the bumps of the road during driving (the restoration process refers to the process in which the piston rod 14 rises or the process in which the piston rod 14 returns to its original position after the compression process), the two-way hydraulic pump 5 does not work, the restoration solenoid valve 3 and the compression solenoid valve 2 are energized to work, and when the piston rod 14 is passively compressed, the hydraulic oil in the working lower chamber 111 is After entering the compression solenoid valve 2, part of the oil enters the accumulator 8 to store energy, and part of the oil enters the oil storage chamber 130, then enters the intermediate chamber 120 through the restoration solenoid valve 3, and finally enters the working upper chamber 110; when the piston rod 14 is restored, the hydraulic oil in the working upper chamber 110 enters the intermediate chamber 120 and then enters the restoration solenoid valve 3, and then enters the oil storage chamber 130, and part of the oil in the accumulator 8 is discharged into the oil storage chamber 130, and finally enters the working lower chamber 111 through the compression solenoid valve 2. This cycle can realize the passive damping adjustment function of the piston rod 14 of the shock absorber.

[0033] In the second working condition (pure active mode), if the piston rod 14 of the shock absorber is actively adjusted, the bidirectional hydraulic pump 5 works. Under this working condition, when the piston rod 14 of the shock absorber is actively lowered, the hydraulic oil enters the middle chamber 120 from the bidirectional hydraulic pump 5 through the first oil circuit 4 and then enters the working upper chamber 110, and a part of the hydraulic oil in the working lower chamber 111 enters the accumulator 8 through the compression solenoid valve 2 for energy storage, and a part of it flows back to the bidirectional hydraulic pump 5 through the second oil circuit 41; when the piston rod 14 of the shock absorber is actively lifted, the hydraulic oil directly enters the working lower chamber 111 from the bidirectional hydraulic pump 5 through the second oil circuit 41, and the hydraulic oil in the working upper chamber 110 flows back to the bidirectional hydraulic pump 5 through the first oil circuit 4, and the oil in the accumulator 8 enters the middle chamber 120 through the recovery solenoid valve 3, compensating for the oil pressure in the first oil circuit 4, and realizing the active lifting of the vehicle body posture. In this cycle, the vehicle body posture can be actively adjusted, thereby realizing the full active damping adjustment function of the piston rod 14 of the shock absorber.

[0034] In the third working condition (damping + full active mode), when the car is driving, if the piston rod 14 of the shock absorber is actively adjusted, the two-way hydraulic pump 5 works, and when the piston rod 14 of the shock absorber actively descends, the hydraulic oil enters the first oil circuit 4 from the two-way hydraulic pump 5, enters the middle chamber 120, and then enters the working upper chamber 110; the hydraulic oil in the working lower chamber 111 is divided into two paths for reflux, one path is refluxed to the two-way hydraulic pump 5 through the second oil circuit 41, and the other path is entered into the compression solenoid valve through the oil inlet of the compression solenoid valve 2 2 and then enter the oil storage chamber 130, and then enter the accumulator 8 to store energy, thereby realizing the active descent of the vehicle body posture; when the piston rod 14 of the shock absorber is restored, the hydraulic oil enters the working lower chamber 111 from the two-way hydraulic pump 5 through the second oil circuit 41, and the hydraulic oil in the working upper chamber 110 flows back to the two-way hydraulic pump 5 through the first oil circuit 4, and the hydraulic oil stored in the accumulator 8 enters the middle chamber 120 through the restoration solenoid valve 3, compensates the oil pressure in the first oil circuit 4, and realizes the active restoration of the vehicle body posture.

[0035] Under the third working condition, by adjusting the opening degree of the valve port of the restoring solenoid valve 3 (the opening degree of the valve port of the compression solenoid valve 2 is controlled by the current of the compression solenoid valve 2), the damping force of the compression process of the piston rod 14 is adjusted; by adjusting the opening degree of the valve port of the compression solenoid valve 2 (the opening degree of the valve port of the restoring solenoid valve 3 is controlled by the current of the restoring solenoid valve 3), the damping force of the restoration process of the piston rod 14 is adjusted. Specifically, during the compression process of the piston rod 14, if the vibration speed of the vehicle body is relatively small, the damping force of the shock absorber required by the vehicle suspension is relatively small, and the shock absorber needs to provide a small damping force in order to obtain better comfort. At this time, the valve opening of the restoring solenoid valve 3 is increased, and the oil pressure of the hydraulic oil entering the working upper chamber 110 is reduced, so that the damping of the piston rod 14 during the descending process is relatively small, thereby making the suspension of the vehicle softer, so that the vehicle can obtain good comfort; when the amplitude of the vehicle body is relatively large, the damping force of the shock absorber required by the vehicle suspension is relatively large, and the shock absorber needs to provide a large damping force at this time to obtain good handling stability. At this time, the valve opening of the restoring solenoid valve 3 is reduced or closed, and the oil pressure of the hydraulic oil entering the working upper chamber 110 is increased, so that the damping of the piston rod 14 during the compression process is relatively large, thereby making the suspension of the vehicle harder, and the shock absorber can provide a larger damping value, so that the vibration of the vehicle can be quickly attenuated, and the turning stability, narrow road maneuverability or slope reversing stability of the vehicle can be improved. Similarly, during the recovery process of the piston rod 14, if the vibration speed of the vehicle body is relatively small, the valve opening of the compression solenoid valve 2 is increased to reduce the damping of the recovery process of the piston rod 14, thereby making the suspension of the vehicle softer and providing good comfort for the vehicle; when the amplitude of the vehicle body is relatively large, the valve opening of the compression solenoid valve 2 is reduced or closed to increase the oil pressure in the lower working chamber 111, so that the damping of the recovery process of the piston rod 14 is relatively large, and the shock absorber can provide a relatively large damping value, thereby quickly attenuating the vibration of the vehicle and improving the vehicle's turning stability, narrow road maneuverability or slope reversing stability.

[0036] In the fourth working condition (active lifting mode), when the car is not moving, if the piston rod 14 of the shock absorber is actively adjusted, the two-way hydraulic pump 5 works, and when the piston rod 14 of the shock absorber is actively lowered, the hydraulic oil enters the working upper chamber 110 from the two-way hydraulic pump 5 through the first oil circuit 4, and at the same time opens the compression solenoid valve 2. At this time, the oil inlet of the compression solenoid valve 2 is connected to the working lower chamber 111, so that the hydraulic oil in the working lower chamber 111 enters the second oil circuit 41 in one way, and enters the compression solenoid valve 2 in the other way and then enters the accumulator 8 to store energy, thereby realizing the active lowering of the car body posture; when the piston rod 14 of the shock absorber is lowered, the hydraulic oil enters the working upper chamber 110 from the two-way hydraulic pump 5 through the first oil circuit 4, and at the same time opens the compression solenoid valve 2. During active lifting, the compression solenoid valve 2 and the restoration solenoid valve 3 are not energized, and the hydraulic oil enters the second oil circuit 41 from the two-way hydraulic pump 5 and then enters the working lower chamber 111. The hydraulic oil in the working upper chamber 110 flows back to the two-way hydraulic pump 5 through the first oil circuit 4. Since the oil pressure of the oil stored in the accumulator 8 is greater than the oil pressure from the working upper chamber 110, the oil from the accumulator 8 forces the one-way valve port of the restoration solenoid valve 3 to open. At this time, the oil from the accumulator 8 will enter the first oil circuit 4 to compensate for the oil pressure in the first oil circuit 4, thereby realizing active lifting of the vehicle body posture.

[0037] In summary, the dual-valve controlled fully active automobile suspension system of the present invention integrates the compression solenoid valve 2 and the restoring solenoid valve 3 on the shock absorber assembly, and can take into account both passive and fully active damping adjustment modes, and can actively adjust the posture of the automobile body, thereby overcoming the technical defects of the existing automobile suspension system that adopts dual-valve control to realize damping adjustment as passive or semi-active damping adjustment mode, cannot take into account the fully active damping adjustment mode, and thus cannot actively adjust the posture of the automobile body.

[0038] In this embodiment, the accumulator 8 is fixed on the oil storage cylinder 13, and the accumulator 8 is arranged in the oil storage chamber 130 or outside the oil storage chamber 130. Specifically, the accumulator 8 can be located in the oil storage chamber 130 or outside the oil storage chamber 130. When the accumulator 8 is arranged in the oil storage chamber 130, the accumulator 8 is an air bag type accumulator 8; Figure 1 As shown in , when the energy storage is arranged outside the oil storage chamber 130, the accumulator 8 is a bladder accumulator 8 or a piston accumulator 8 or a bellows accumulator 8. The specific changes can be reasonably made according to the application scenario and are not limited here.

[0039] In this embodiment, a first pressure sensor 6 is further provided on the first oil circuit 4, and the first pressure sensor 6 is used to detect the oil pressure in the first oil circuit 4; a second pressure sensor 61 is further provided on the second oil circuit 41, and the second pressure sensor 61 is used to detect the oil pressure in the second oil circuit 41. In addition, the present invention also includes a first safety valve 7 and a second safety valve 70, the oil inlet of the first safety valve 7 is connected to the first oil circuit 4, and the oil outlet of the first safety valve 7 is connected to the second oil circuit 41. Among them, the oil inlet of the first safety valve 7 is connected to the first oil circuit 4, and the oil outlet of the first safety valve 7 is connected to the second oil circuit 41; the oil inlet of the second safety valve 70 is connected to the second oil circuit 41, and the oil outlet of the second safety valve 70 is connected to the first oil circuit 4. When the oil pressure of the hydraulic oil entering the working upper chamber 110 from the first oil circuit 4 is greater than a preset threshold, the first safety valve 7 is activated to release the pressure of the oil in the first oil circuit 4, thereby playing a role of safety protection; when the oil pressure of the hydraulic oil entering the working lower chamber 111 from the second oil circuit 41 is greater than a preset threshold, the second safety valve 70 is activated to release the pressure of the oil in the second oil circuit 41, thereby playing a role of safety protection.

[0040] In this embodiment, the second safety valve 70 corresponds to one hydraulic pump assembly corresponding to one shock absorber assembly 1 and one set of hydraulic oil circuits; that is, it can be understood that one hydraulic pump assembly corresponds to one shock absorber assembly and one set of hydraulic oil circuits, which means that the present invention adopts an independent-configuration suspension system, and the independent-configuration suspension system means that each drive motor and hydraulic pump independently provide flow and pressure to the shock absorber assembly 1 of each wheel.

[0041] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A dual-valve controlled fully active automobile suspension system, characterized in that: The invention comprises a shock absorber assembly, a hydraulic pump assembly, a hydraulic oil circuit, a compression solenoid valve and a restoration solenoid valve. The shock absorber assembly comprises an intermediate cylinder, a working cylinder and an oil storage cylinder. The inner cavity of the working cylinder is a working cavity. A piston rod for adjusting the posture of the vehicle is arranged in the working cavity. The piston rod divides the working cavity into an upper working cavity and a lower working cavity. The intermediate cylinder sleeve is arranged outside the working cylinder. An intermediate cavity is formed between the inner wall of the intermediate cylinder and the outer wall of the working cylinder. The intermediate cavity is connected with the upper working cavity. The oil storage cylinder sleeve is arranged outside the intermediate cylinder. An oil storage cavity is formed between the inner wall of the oil storage cylinder and the outer wall of the intermediate cylinder. The solenoid valve is fixed on the oil storage cylinder, and the oil inlet and oil outlet of the restoration solenoid valve are communicated with the middle chamber and the oil storage chamber respectively; the compression solenoid valve is fixed on the oil storage cylinder, and the oil inlet and oil outlet of the compression solenoid valve are communicated with the working lower chamber and the oil storage chamber respectively; the hydraulic pump assembly includes a bidirectional hydraulic pump and a drive unit, and the drive unit serves as a power unit of the bidirectional hydraulic pump; the hydraulic oil circuit includes a first oil circuit and a second oil circuit, and the two ends of the first oil circuit are communicated with the middle chamber and the first oil port of the bidirectional hydraulic pump respectively, and the two ends of the second oil circuit are communicated with the working lower chamber and the second oil port of the bidirectional hydraulic pump respectively.

2. The dual-valve controlled fully active vehicle suspension system according to claim 1, characterized in that: An accumulator is connected in parallel between the oil outlet of the restoration solenoid valve and the oil outlet of the compression solenoid valve.

3. The dual-valve controlled fully active vehicle suspension system according to claim 2, characterized in that: The accumulator is fixed on the oil storage cylinder, and the accumulator is arranged in the oil storage cavity or outside the oil storage cavity.

4. The dual-valve controlled fully active vehicle suspension system according to claim 3, characterized in that: When the accumulator is arranged in the oil storage chamber, the accumulator is an air bag accumulator.

5. The dual-valve controlled fully active vehicle suspension system according to claim 3, characterized in that: When the accumulator is arranged outside the oil storage chamber, the accumulator is a bladder accumulator, a piston accumulator or a bellows accumulator.

6. The dual-valve controlled fully active vehicle suspension system according to claim 1, characterized in that: The first oil circuit is also provided with a first pressure sensor for detecting the oil pressure in the first oil circuit.

7. The dual-valve controlled fully active vehicle suspension system according to claim 1, characterized in that: The second oil circuit is also provided with a second pressure sensor for detecting the oil pressure in the second oil circuit.

8. The dual-valve controlled fully active automobile suspension system according to claim 1, characterized in that: It also includes a first safety valve, wherein an oil inlet of the first safety valve is communicated with the first oil circuit, and an oil outlet of the first safety valve is communicated with the second oil circuit.

9. The dual-valve controlled fully active automobile suspension system according to claim 1, characterized in that: A second safety valve is also included, wherein an oil inlet of the second safety valve is communicated with the second oil circuit, and an oil outlet of the second safety valve is communicated with the first oil circuit.

10. The dual-valve controlled fully active vehicle suspension system according to claim 1, characterized in that: One hydraulic pump assembly corresponds to one shock absorber assembly and one set of hydraulic oil circuits.

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