Active suspension system and vehicle

Abstract

The utility model discloses an active suspension system and a vehicle. The active suspension system comprises a shock absorber, a driving device and a driving device, a damping branch; the driving branch and the damping branch are arranged in parallel, a two-way electro-hydraulic pump, a first one-way valve and a second one-way valve are arranged on the driving branch, the two-way electro-hydraulic pump is provided with a first inlet and outlet and a second inlet and outlet, the first one-way valve is arranged between the first inlet and outlet and the recovery cavity, and the second one-way valve is arranged between the second inlet and outlet and the compression cavity; the first end of the connecting branch is connected with the damping branch, and the second end of the connecting branch selectively communicates between the first inlet and outlet and the first one-way valve or selectively communicates between the second inlet and outlet and the second one-way valve. Therefore, the framework of the active suspension system can be optimized, on the premise that the active control function of the active suspension system is guaranteed, the energy consumption of the two-way electro-hydraulic pump to the active suspension system is reduced, and the energy-saving performance of the vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to an active suspension system and a vehicle. Background Art

[0002] An active suspension system is a system that improves the driving stability of a whole vehicle by applying an active control strategy to the suspension during vehicle driving. A bi-directional electro-hydraulic pump is arranged in the active suspension system. When the vehicle needs active force, the electro-hydraulic pump selectively extracts oil to make the shock absorber output active force in the compression direction or the recovery direction, ensuring the normal operation of the active suspension system.

[0003] In the related art, in the active suspension system, the valve control branch and the active pump branch of the shock absorber are arranged in parallel. Although the application of active force can be realized, when the whole vehicle does not need active force, since the pressure of the active pump branch is very small, in order to ensure the establishment of the damping force of the shock absorber, the pump needs to be powered on and locked to prevent the oil from flowing, thus generating redundant power consumption. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide an active suspension system, which can reduce the energy consumption of the whole vehicle by the bi-directional electro-hydraulic pump.

[0005] Another object of the utility model is to provide a vehicle.

[0006] The active suspension system according to the embodiment of the utility model includes: a shock absorber, the shock absorber includes a cylinder barrel and a piston, the piston is movably arranged in the cylinder barrel and divides the space in the cylinder barrel into a recovery chamber and a compression chamber; a damping branch, both ends of the damping branch are respectively communicated with the recovery chamber and the compression chamber; an active branch, the active branch is arranged in parallel with the damping branch, a bi-directional electro-hydraulic pump, a first one-way valve and a second one-way valve are arranged on the active branch, the bi-directional electro-hydraulic pump is provided with a first inlet and a second inlet, the first inlet is communicated with the recovery chamber, the first one-way valve is arranged between the first inlet and the recovery chamber to allow the oil flowing out from the first inlet to flow to the recovery chamber, the second inlet is communicated with the compression chamber, the second one-way valve is arranged between the second inlet and the compression chamber to allow the oil flowing out from the second inlet to flow to the compression chamber; a connecting branch, the first end of the connecting branch is connected with the damping branch, and the second end of the connecting branch is selectively communicated between the first inlet and the first one-way valve, or selectively communicated between the second inlet and the second one-way valve.

[0007] Thus, through the settings of the first check valve, the second check valve, and the connecting branch, the architecture of the active suspension system can be optimized. On the premise of ensuring the active control function of the active suspension system, the energy consumption of the two-way electro-hydraulic pump 31 for the active suspension system can be reduced, and the energy saving of the vehicle can be improved.

[0008] In some examples of the present utility model, a third check valve is provided on the connecting branch. One end of the third check valve is communicated between the first inlet / outlet and the first check valve, and the other end of the third check valve is communicated with the damping branch to allow the hydraulic fluid flowing out of the damping branch to flow towards the first inlet / outlet.

[0009] In some examples of the present utility model, a fourth check valve is provided on the connecting branch. One end of the fourth check valve is communicated between the second inlet / outlet and the second check valve, and the other end of the fourth check valve is communicated with the damping branch to allow the hydraulic fluid flowing out of the damping branch to flow towards the second inlet / outlet.

[0010] In some examples of the present utility model, the connecting branch includes a first sub-branch, a second sub-branch, and a third sub-branch. The first end of the first sub-branch is communicated with the damping branch. The first end of the second sub-branch is communicated between the first inlet / outlet and the first check valve. The second end of the second sub-branch is selectively communicated with the second end of the first sub-branch. The first end of the third sub-branch is communicated between the second inlet / outlet and the second check valve. The second end of the third sub-branch is selectively communicated with the second end of the first sub-branch. The third check valve is provided on the second sub-branch, and the fourth check valve is provided on the third sub-branch.

[0011] In some examples of the present utility model, a first damping valve assembly and a second damping valve assembly are provided on the damping branch. The first damping valve assembly and the second damping valve assembly are connected to selectively control the flow direction and damping of the hydraulic fluid in the damping branch. The first end of the connecting branch is connected between the first damping valve assembly and the second damping valve assembly.

[0012] In some examples of the present utility model, the active suspension system further includes: an accumulator, and the accumulator is communicated between the first damping valve assembly and the second damping valve assembly.

[0013] In some examples of the present utility model, the first damping valve assembly includes a first damping valve and a fifth one-way valve, the first damping valve and the fifth one-way valve are arranged in parallel, the second damping valve assembly includes a second damping valve and a sixth one-way valve, the second damping valve and the sixth one-way valve are arranged in parallel, the first damping valve and the sixth one-way valve allow the oil in the recovery chamber to flow to the compression chamber, and the second damping valve and the fifth one-way valve allow the oil in the compression chamber to flow to the recovery chamber.

[0014] In some examples of the present utility model, both the first damping valve and the second damping valve are solenoid valves.

[0015] In some examples of the present utility model, the active suspension system further includes: a motor, and the motor is electrically connected to the two-way electro-hydraulic pump.

[0016] A vehicle according to an embodiment of the present utility model includes: the above-mentioned active suspension system.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic diagram of an active suspension system according to an embodiment of the present utility model;

[0020] Figure 2 is a diagram of the oil flow path of the active suspension system according to an embodiment of the present utility model when an active force in the compression direction is applied;

[0021] Figure 3 is a diagram of the oil flow path of the active suspension system according to an embodiment of the present utility model when an active force in the recovery direction is applied;

[0022] Figure 4 is a diagram of the oil flow path of the active suspension system according to an embodiment of the present utility model when no active force is applied.

[0023] Reference Signs:

[0024] 100, active suspension system;

[0025] 10, shock absorber; 11, cylinder barrel; 111, recovery chamber; 112, compression chamber; 12, piston;

[0026] 20. Damping branch; 21. First damping valve assembly; 211. First damping valve; 212. Fifth one-way valve; 22. Second damping valve assembly; 221. Second damping valve; 222. Sixth one-way valve;

[0027] 30. Active branch; 31. Bidirectional electro-hydraulic pump; 311. First inlet / outlet; 312. Second inlet / outlet; 32. First one-way valve; 33. Second one-way valve;

[0028] 40. Connecting branch; 41. First sub-branch; 42. Second sub-branch; 421. Third one-way valve; 43. Third sub-branch; 431. Fourth one-way valve;

[0029] 50. Accumulator; 60. Motor. Detailed implementation manners

[0030] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0031] Below, refer to Figures 1 - 4 Describe the active suspension system 100 according to the embodiments of the present invention. The active suspension system 100 can be applied to a vehicle.

[0032] Combined with Figures 1 - 4 As shown, the active suspension system 100 according to the present invention mainly includes: a shock absorber 10, a damping branch 20, an active branch 30, and a connecting branch 40.

[0033] Among them, the shock absorber 10 mainly includes a cylinder barrel 11 and a piston 12. The piston 12 is movably arranged in the cylinder barrel 11 and divides the space in the cylinder barrel 11 into a rebound chamber 111 and a compression chamber 112. Both ends of the damping branch 20 are respectively communicated with the rebound chamber 111 and the compression chamber 112. The active branch 30 is arranged in parallel with the damping branch 20. Both ends of the active branch 30 are respectively communicated with the rebound chamber 111 and the compression chamber 112. A bidirectional electro-hydraulic pump 31 is arranged on the active branch 30. The bidirectional electro-hydraulic pump 31 is provided with a first inlet / outlet 311 and a second inlet / outlet 312. The first inlet / outlet 311 is communicated with the rebound chamber 111, and the second inlet / outlet 312 is communicated with the compression chamber 112.

[0034] Specifically, by setting the damping branch 20 and the active branch 30, both ends of the damping branch 20 are respectively communicated with the rebound chamber 111 and the compression chamber 112. Both ends of the active branch 30 are respectively communicated with the rebound chamber 111 and the compression chamber 112. The active branch 30 is arranged in parallel with the damping branch 20. In this way, the hydraulic oil can selectively flow through at least one of the damping branch 20 and the active branch 30 from one of the rebound chamber 111 and the compression chamber 112 to the other, so as to adapt to different operating states and driving environments of the vehicle.

[0035] Specifically, when the vehicle is driving normally, no additional active force needs to be provided to the shock absorber 10. The shock absorber 10 and the damping branch 20 work, and the hydraulic fluid in one of the recovery chamber 111 and the compression chamber 112 can be transported to the other through the damping branch 20, and the damping branch 20 provides damping force.

[0036] When it is necessary to provide an active force in the compression direction or the recovery direction to the shock absorber 10 of the active suspension system 100 to suppress the upward or downward movement of the vehicle body, for example, when the vehicle is turning or passing over a bumpy road surface such as a speed bump, not only can the hydraulic fluid in one of the recovery chamber 111 and the compression chamber 112 be transported to the other through the work of the shock absorber 10 and the damping branch 20, but also through the work of the bi-directional electro-hydraulic pump 31, the hydraulic fluid in one of the recovery chamber 111 and the compression chamber 112 can be transported to the other through the active branch 30, so as to achieve active control of the active suspension system 100.

[0037] In this way, the active suspension system 100 can adjust its own stiffness and damping by controlling the flow path of the hydraulic fluid to adapt to different road conditions and driving requirements, and can significantly improve the vehicle's handling performance and riding comfort.

[0038] However, when the whole vehicle does not require active force, since the active branch 30 and the damping branch 20 are connected in parallel with each other, the pressure of the active branch 30 is very small. To prevent a possible passage through the bi-directional electro-hydraulic pump 31 during the movement of the shock absorber 10 and ensure the establishment of the damping force, it is necessary to energize the bi-directional electro-hydraulic pump 31 to lock it and prevent the hydraulic fluid from flowing through the active branch 30, which will cause power consumption of the bi-directional electro-hydraulic pump 31.

[0039] Combined with Figures 1 - 4 As shown, the active branch 30 is further provided with a first one-way valve 32 and a second one-way valve 33. The first one-way valve 32 is arranged between the first inlet / outlet 311 and the recovery chamber 111 to allow the hydraulic fluid flowing out from the first inlet / outlet 311 to flow into the recovery chamber 111. The second one-way valve 33 is arranged between the second inlet / outlet 312 and the compression chamber 112 to allow the hydraulic fluid flowing out from the second inlet / outlet 312 to flow into the compression chamber 112. And, the first end of the connecting branch 40 is connected to the damping branch 20, and the second end of the connecting branch 40 is selectively communicated between the first inlet / outlet 311 and the first one-way valve 32, or selectively communicated between the second inlet / outlet 312 and the second one-way valve 33.

[0040] Specifically, by disposing the first one-way valve 32 between the first inlet / outlet 311 and the recovery chamber 111, the first one-way valve 32 can allow the hydraulic fluid flowing out from the first inlet / outlet 311 to flow towards the recovery chamber 111, and does not allow the hydraulic fluid flowing out from the recovery chamber 111 to flow towards the first inlet / outlet 311. Thus, when the vehicle does not require active power and the shock absorber 10 is in the compressed state, the hydraulic fluid flowing out from the recovery chamber 111 can only flow through the damping branch 20 towards the compression chamber 112, and the hydraulic fluid will not flow through the bidirectional electro-hydraulic pump 31 to form a path.

[0041] By disposing the second one-way valve 33 between the second inlet / outlet 312 and the compression chamber 112, the second one-way valve 33 can allow the hydraulic fluid flowing out from the second inlet / outlet 312 to flow towards the compression chamber 112, and does not allow the hydraulic fluid flowing out from the compression chamber 112 to flow towards the second inlet / outlet 312. Thus, when the vehicle does not require active power and the shock absorber 10 is in the compressed state, the hydraulic fluid flowing out from the compression chamber 112 can only flow through the damping branch 20 towards the recovery chamber 111, and the hydraulic fluid will not flow through the bidirectional electro-hydraulic pump 31 to form a path.

[0042] In this way, through the settings of the first one-way valve 32 and the second one-way valve 33, when the whole vehicle does not require active power, the active branch 30 can be closed, which can reduce the energy consumption of the electro-hydraulic pump for the whole vehicle and improve the energy-saving performance of the active suspension system 100.

[0043] It can be understood that the settings of the first one-way valve 32 and the second one-way valve 33 will still close the active branch 30 when the vehicle requires active power, resulting in the inability of the bidirectional electro-hydraulic pump 31 to transport the hydraulic fluid to provide active power for the shock absorber 10. By providing a connection branch 40, the first end of the connection branch 40 is connected to the damping branch 20, and the second end of the connection branch 40 is selectively communicated between the first inlet / outlet 311 and the first one-way valve 32, or selectively communicated between the second inlet / outlet 312 and the second one-way valve 33. In this way, when the vehicle requires active power, the bidirectional electro-hydraulic pump 31 can also extract the hydraulic fluid in the damping branch 20 and transport it to the recovery chamber 111 or the compression chamber 112 to provide active power for the shock absorber 10, ensuring the active control of the active suspension system 100.

[0044] Therefore, through the settings of the first one-way valve 32, the second one-way valve 33 and the connection branch 40, the architecture of the active suspension system 100 can be optimized. On the premise of ensuring the active control function of the active suspension system 100, the energy consumption of the bidirectional electro-hydraulic pump 31 for the active suspension system 100 can be reduced, and the energy-saving performance of the vehicle can be improved.

[0045] Combined Figure 1 and Figure 2As shown, a third check valve 421 is provided on the connecting branch 40. One end of the third check valve 421 is communicated with the first inlet / outlet 311 and the first check valve 32, and the other end of the third check valve 421 is communicated with the damping branch 20 to allow the oil flowing out of the damping branch 20 to flow to the first inlet / outlet 311.

[0046] Specifically, by communicating one end of the third check valve 421 with the first inlet / outlet 311 and the first check valve 32, and communicating the other end of the third check valve 421 with the damping branch 20, the third check valve 421 can allow the oil flowing out of the damping branch 20 to flow to the first inlet / outlet 311, and the third check valve 421 can block the oil flowing out of the first inlet / outlet 311 from flowing to the damping branch 20. Thus, when the active suspension system 100 applies an active force in the compression direction and the oil flows out of the first inlet / outlet 311 under the action of the bi-directional electro-hydraulic pump 31, the third check valve 421 can block the oil from returning to the damping branch 20, and the first check valve 32 can allow the oil to flow to the recovery chamber 111, thereby ensuring the normal application of the active force in the compression direction and the normal operation of the active suspension system 100.

[0047] Combined with Figure 1 and Figure 3 As shown, a fourth check valve 431 is provided on the connecting branch 40. One end of the fourth check valve 431 is communicated with the second inlet / outlet 312 and the second check valve 33, and the other end of the fourth check valve 431 is communicated with the damping branch 20 to allow the oil flowing out of the damping branch 20 to flow to the second inlet / outlet 312.

[0048] Specifically, by communicating one end of the fourth check valve 431 with the second inlet / outlet 312 and the second check valve 33, and communicating the other end of the fourth check valve 431 with the damping branch 20, the fourth check valve 431 can allow the oil flowing out of the damping branch 20 to flow to the second inlet / outlet 312, and the fourth check valve 431 can block the oil flowing out of the second inlet / outlet 312 from flowing to the damping branch 20. Thus, when the active suspension system 100 applies an active force in the recovery direction and the oil flows out of the second inlet / outlet 312 under the action of the bi-directional electro-hydraulic pump 31, the fourth check valve 431 can block the oil from returning to the damping branch 20, and the second check valve 33 can allow the oil to flow to the compression chamber 112, thereby ensuring the normal application of the active force in the recovery direction and the normal operation of the active suspension system 100.

[0049] Combined with Figures 1 - 3As shown, the connecting branch 40 may mainly include a first sub-branch 41, a second sub-branch 42, and a third sub-branch 43. The first end of the first sub-branch 41 is communicated with the damping branch 20. The first end of the second sub-branch 42 is communicated between the first inlet / outlet 311 and the first one-way valve 32. The second end of the second sub-branch 42 is selectively communicated with the second end of the first sub-branch 41. The first end of the third sub-branch 43 is communicated between the second inlet / outlet 312 and the second one-way valve 33. The second end of the third sub-branch 43 is selectively communicated with the second end of the first sub-branch 41. A third one-way valve 421 is disposed on the second sub-branch 42, and a fourth one-way valve 431 is disposed on the third sub-branch 43.

[0050] In this way, the first sub-branch 41, the second sub-branch 42, the third sub-branch 43, the third one-way valve 421, and the fourth one-way valve 431 may form the basic structure of the connecting branch 40. The damping branch 20 may be selectively communicated with the second inlet / outlet 312 of the bidirectional electro-hydraulic pump 31 through the first sub-branch 41, the third sub-branch 43, and the fourth one-way valve 431, or may be selectively communicated with the first inlet / outlet 311 of the bidirectional electro-hydraulic pump 31 through the first sub-branch 41, the second sub-branch 42, and the third one-way valve 421.

[0051] As above, by disposing both the first one-way valve 32 and the second one-way valve 33 on the active branch 30, the first one-way valve 32 and the second one-way valve 33 are respectively connected to both ends of the bidirectional electro-hydraulic pump 31, and by disposing the third one-way valve 421 and the fourth one-way valve 431 on the second sub-branch 42 and the third sub-branch 43 respectively, the flow path of the oil fluid can be defined, and the reliability and stability of the active suspension system 100 can be improved.

[0052] Combined Figures 1 - 4 As shown, a first damping valve assembly 21 and a second damping valve assembly 22 are disposed on the damping branch 20. The first damping valve assembly 21 and the second damping valve assembly 22 are connected to selectively control the flow direction and damping of the oil fluid in the damping branch 20. The first end of the connecting branch 40 is connected between the first damping valve assembly 21 and the second damping valve assembly 22.

[0053] Specifically, by disposing the first damping valve assembly 21 and the second damping valve assembly 22 on the damping branch 20 and connecting the first damping valve assembly 21 and the second damping valve assembly 22, the flow direction of the oil fluid in the damping branch 20 can be selectively controlled by controlling the first damping valve assembly 21 and the second damping valve assembly 22, and the damping of the oil fluid in the damping branch 20 can be controlled to realize the adjustment of the softness and hardness of the shock absorber 10 and improve the reliability of the active suspension system 100.

[0054] Further, connect the first end of the connecting branch 40 between the first damping valve assembly 21 and the second damping valve assembly 22, so as to optimize the connection position of the first end of the connecting branch 40, such that the oil flowing out of the recovery chamber 111 needs to flow through the first damping valve assembly 21 before flowing to the connecting branch 40, and the oil flowing out of the compression chamber 112 needs to flow through the second damping valve assembly 22 before flowing to the connecting branch 40. In this way, after the oil flowing out of the recovery chamber 111 passes through the first damping valve assembly 21, its oil pressure will drop, and after the oil flowing out of the compression chamber 112 passes through the second damping valve assembly 22, its oil pressure will also drop. This can ensure that when no active force is applied to the active suspension system 100, the oil flowing to the connecting branch 40 cannot open the third one-way valve 421 and the fourth one-way valve 431, and the oil cannot flow to the bidirectional electro-hydraulic pump 31 of the active branch 30, thereby ensuring that the energy consumption of the bidirectional electro-hydraulic pump 31 for the whole vehicle can be reduced.

[0055] Combined Figures 1 - 4 As shown, the active suspension system 100 may further include: an accumulator 50, and the accumulator 50 is connected and communicated between the first damping valve assembly 21 and the second damping valve assembly 22. Specifically, by providing the accumulator 50 in the active suspension system 100 and connecting and communicating the accumulator 50 between the first damping valve assembly 21 and the second damping valve assembly 22, and since the first end of the connecting branch 40 is also connected between the first damping valve assembly 21 and the second damping valve assembly 22, and the second end of the connecting branch 40 is connected to the active branch 30, the active branch 30 can also be connected and communicated with the accumulator 50 through the connecting branch 40, that is: the accumulator 50 can be connected and communicated with both the damping branch 20 and the active branch 30 at the same time.

[0056] In this way, the accumulator 50 can function as storing and releasing oil.

[0057] Specifically, when the active suspension system 100 needs the shock absorber 10 to output active force, the bidirectional electro-hydraulic pump 31 can extract oil from the accumulator 50 through the connecting branch 40 and correspondingly supplement it to the recovery chamber 111 or the compression chamber 112. When the active suspension system 100 does not need the shock absorber 10 to output active force, the accumulator 50 can also selectively release or store oil according to the system pressure, thereby ensuring the normal operation of the active suspension system 100.

[0058] It should be noted that by connecting and communicating the accumulator 50 between the first damping valve assembly 21 and the second damping valve assembly 22, the oil in the recovery chamber 111 needs to pass through the pressure reduction of the first damping valve 211 and then flow through the accumulator 50, and the oil in the compression chamber 112 needs to pass through the pressure reduction of the second damping valve 221 and then flow through the accumulator 50, thereby ensuring the oil pressure balance of the active suspension system 100 and ensuring the normal operation of the active suspension system 100.

[0059] Combined with Figures 1 - 4 As shown, the first damping valve assembly 21 may include a first damping valve 211 and a fifth one-way valve 212. The first damping valve 211 and the fifth one-way valve 212 are arranged in parallel. The second damping valve assembly 22 may include a second damping valve 221 and a sixth one-way valve 222. The second damping valve 221 and the sixth one-way valve 222 are arranged in parallel. The first damping valve 211 and the sixth one-way valve 222 allow the oil in the recovery chamber 111 to flow to the compression chamber 112, and the second damping valve 221 and the fifth one-way valve 212 allow the oil in the compression chamber 112 to flow to the recovery chamber 111.

[0060] Specifically, the first damping valve assembly 21 may include a first damping valve 211 and a fifth one-way valve 212, and the first damping valve 211 and the fifth one-way valve 212 are arranged in parallel. Among them, the first damping valve 211 can be selectively opened and closed to provide a damping force for the oil in the branch and adjust the oil pressure in the branch. The fifth one-way valve 212 allows the oil flowing out of the second damping valve assembly 22 to flow to the recovery chamber 111, and the fifth one-way valve 212 does not allow the oil in the recovery chamber 111 to flow to the second damping valve assembly 22.

[0061] And, the second damping valve assembly 22 may include a second damping valve 221 and a sixth one-way valve 222, and the second damping valve 221 and the sixth one-way valve 222 are arranged in parallel. Among them, the second damping valve 221 can be selectively opened and closed to provide a damping force for the oil in the branch and adjust the oil pressure in the branch. The sixth one-way valve 222 allows the oil flowing out of the first damping valve assembly 21 to flow to the compression chamber 112, and the sixth one-way valve 222 does not allow the oil flowing out of the compression chamber 112 to flow to the first damping valve assembly 21.

[0062] It can be understood that since the first damping valve assembly 21 and the second damping valve assembly 22 are connected, the first damping valve 211 and the sixth one-way valve 222 can form an oil flow path that allows the oil in the recovery chamber 111 to flow to the compression chamber 112, and the second damping valve 221 and the fifth one-way valve 212 can form another oil flow path that allows the oil in the compression chamber 112 to flow to the recovery chamber 111. Thus, when the oil flows between the recovery chamber 111 and the compression chamber 112 through the damping branch 20, when the flow directions are different, their flow paths are also different, thereby improving the reliability of the active suspension system 100.

[0063] Furthermore, both the first damping valve 211 and the second damping valve 221 are solenoid valves. Specifically, both the first damping valve 211 and the second damping valve 221 can be set as solenoid valves. In this way, the first damping valve 211 and the second damping valve 221 can respond quickly according to the information provided by the sensor (such as vehicle speed, road conditions, vehicle body attitude, etc.) by the electronic control system (such as the electronic control unit ECU), which is convenient for adjusting and controlling the flow rate and damping of the oil passing through the branches where the first damping valve 211 and the second damping valve 221 are located. Thus, the hardness or softness of the shock absorber 10 can be adjusted in real time, making the adjustment and control more timely and accurate, and improving the working performance of the active suspension system 100.

[0064] Combined with Figure 1 As shown, the active suspension system 100 may further include: a motor 60, and the motor 60 is electrically connected to the bidirectional electro-hydraulic pump 31. Specifically, by electrically connecting the motor 60 to the bidirectional electro-hydraulic pump 31, the power of the motor 60 can be transmitted to the bidirectional electro-hydraulic pump 31 to drive the bidirectional electro-hydraulic pump 31 to rotate forward or backward, thereby realizing the control of the bidirectional electro-hydraulic pump 31 and making the active suspension system 100 more intelligent and controllable.

[0065] In this way, the active suspension system 100 can at least include three working states such as the state of applying an active force in the compression direction, the state of applying an active force in the rebound direction, and the state of not applying an active force. When the vehicle is working, the motor 60, the first damping valve 211, the second damping valve 221, and the shock absorber 10 can be controlled according to the actual operating conditions to make the active suspension system 100 switch different working states, thereby ensuring the comfort of driving and riding and improving the user experience.

[0066] Combined with Figure 1 and Figure 2 As shown, when the active suspension system 100 needs the shock absorber 10 to output an active force in the compression direction to suppress the upward movement of the vehicle body, the flow path of the oil is as shown by the arrow. The oil in the rebound chamber 111 needs to be increased, and the shock absorber 10 quickly shortens. At this time, on the one hand, the second damping valve 221 is set to the softest mode, and the first damping valve 211 is set to the hardest mode. The oil flows through the second damping valve 221 to the accumulator 50, and through the second damping valve 221 and the fifth one-way valve 212 to the rebound chamber 111, and the second damping valve 221 and the fifth one-way valve 212 can prevent the oil in the rebound chamber 111 from flowing out. On the other hand, the motor 60 drives the bidirectional electro-hydraulic pump 31 to rotate forward, and the oil in the accumulator 50 is transported to the rebound chamber 111 through the first sub-branch 41, the third sub-branch 43, and the first one-way valve 32 and compresses the compression chamber 112 to generate an active force in the compression direction.

[0067] Combined with Figure 1 and Figure 3As shown, when the active suspension system 100 needs the shock absorber 10 to output an active force in the rebound direction to suppress the downward movement of the vehicle body, the flow path of the hydraulic fluid is as shown by the arrow. The compression chamber 112 needs to increase the hydraulic fluid, and the shock absorber 10 quickly stretches. At this time, on the one hand, the first damping valve 211 is set to the softest mode, and the second damping valve 221 is set to the hardest mode. The hydraulic fluid flows through the second damping valve 221 to the accumulator 50, and through the second damping valve 221 and the sixth one-way valve 222 to the compression chamber 112. The second damping valve 221 and the sixth one-way valve 222 prevent the hydraulic fluid in the compression chamber 112 from flowing out. On the other hand, the motor 60 drives the bidirectional electro-hydraulic pump 31 to rotate reversely, and transports the hydraulic fluid in the accumulator 50 to the compression chamber 112 through the first sub-branch 41, the second sub-branch 42, and the second one-way valve 33, thereby realizing the application of the active force in the rebound direction.

[0068] Combined with Figure 1 and Figure 4 As shown, when no active force is applied to the active suspension system 100, the flow path of the hydraulic fluid is as shown by the arrow. The first one-way valve 32 and the second one-way valve 33 close the active branch 30, which can reduce the energy consumption of the bidirectional electro-hydraulic pump 31. Among them, when the shock absorber 10 is in the stretched state, the hydraulic fluid in the rebound chamber 111 returns to the compression chamber 112 successively through the first damping valve 211 and the sixth one-way valve 222. The first damping valve 211 generates a damping force to improve the driving and riding stability. And when the shock absorber 10 is in the compressed state, the hydraulic fluid in the compression chamber 112 returns to the rebound chamber 111 through the second damping valve 221 and the fifth one-way valve 212. The second damping valve 221 generates a damping force to improve the driving and riding stability.

[0069] The vehicle according to the present invention may include: the above-mentioned active suspension system 100. Specifically, the active suspension system 100 can not only meet the application of the active force of the shock absorber 10 to achieve active control, but also when the shock absorber 10 does not require active force, the hydraulic fluid does not pass through the bidirectional electro-hydraulic pump 31, avoiding the energy consumption of the bidirectional electro-hydraulic pump 31. By applying the active suspension system 100 to the vehicle, on the premise of ensuring the normal operation of the vehicle and improving the driving and riding stability, the energy consumption of the vehicle is reduced, and the energy-saving performance of the vehicle is improved, thereby improving the product competitiveness of the vehicle and the user experience.

[0070] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0072] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An active suspension system, characterized in that: include: A shock absorber (10), the shock absorber (10) comprising a cylinder (11) and a piston (12), the piston (12) being movably disposed in the cylinder (11) and dividing the space in the cylinder (11) into a restoring chamber (111) and a compression chamber (112); A damping branch (20), wherein two ends of the damping branch (20) are respectively connected to the restoration chamber (111) and the compression chamber (112); an active branch (30), the active branch (30) being arranged in parallel with the damping branch (20), the active branch (30) being provided with a bidirectional electro-hydraulic pump (31), a first one-way valve (32) and a second one-way valve (33), the bidirectional electro-hydraulic pump (31) being provided with a first inlet and outlet (311) and a second inlet and outlet (312), the first inlet and outlet (311) being in communication with the restoring chamber (111), the first one-way valve (32) being arranged between the first inlet and outlet (311) and the restoring chamber (111) to allow the oil flowing out of the first inlet and outlet (311) to flow into the restoring chamber (111), the second inlet and outlet (312) being in communication with the compression chamber (112), the second one-way valve (33) being arranged between the second inlet and outlet (312) and the compression chamber (112) to allow the oil flowing out of the second inlet and outlet (312) to flow into the compression chamber (112); A connecting branch (40), wherein a first end of the connecting branch (40) is connected to the damping branch (20), and a second end of the connecting branch (40) is selectively connected between the first inlet and outlet (311) and the first one-way valve (32), or selectively connected between the second inlet and outlet (312) and the second one-way valve (33).

2. The active suspension system according to claim 1, characterized in that: A third one-way valve (421) is provided on the connecting branch (40), one end of the third one-way valve (421) is connected to the first inlet and outlet (311) and the first one-way valve (32), and the other end of the third one-way valve (421) is connected to the damping branch (20) to allow the oil flowing out of the damping branch (20) to flow to the first inlet and outlet (311).

3. The active suspension system according to claim 2, characterized in that: A fourth one-way valve (431) is provided on the connecting branch (40), one end of the fourth one-way valve (431) is connected to the second inlet and outlet (312) and the second one-way valve (33), and the other end of the fourth one-way valve (431) is connected to the damping branch (20) to allow the oil flowing out of the damping branch (20) to flow to the second inlet and outlet (312).

4. The active suspension system according to claim 3, characterized in that: The connecting branch (40) comprises a first sub-branch (41), a second sub-branch (42) and a third sub-branch (43); the first end of the first sub-branch (41) is connected to the damping branch (20); the first end of the second sub-branch (42) is connected to the first inlet and outlet (311) and the first one-way valve (32); the second end of the second sub-branch (42) is selectively connected to the second end of the first sub-branch (41); the first end of the third sub-branch (43) is connected to the second inlet and outlet (312) and the second one-way valve (33); the second end of the third sub-branch (43) is selectively connected to the second end of the first sub-branch (41); the third one-way valve (421) is arranged on the second sub-branch (42); and the fourth one-way valve (431) is arranged on the third sub-branch (43).

5. The active suspension system according to claim 2, characterized in that: The damping branch (20) is provided with a first damping valve assembly (21) and a second damping valve assembly (22); the first damping valve assembly (21) and the second damping valve assembly (22) are connected to selectively control the flow direction and damping of oil in the damping branch (20); and the first end of the connecting branch (40) is connected between the first damping valve assembly (21) and the second damping valve assembly (22).

6. The active suspension system according to claim 5, characterized in that: Also includes: An accumulator (50), wherein the accumulator (50) is in communication with the first damping valve assembly (21) and the second damping valve assembly (22).

7. The active suspension system according to claim 5, characterized in that: The first damping valve assembly (21) comprises a first damping valve (211) and a fifth one-way valve (212), the first damping valve (211) and the fifth one-way valve (212) being arranged in parallel, and the second damping valve assembly (22) comprises a second damping valve (221) and a sixth one-way valve (222), the second damping valve (221) and the sixth one-way valve (222) being arranged in parallel, the first damping valve (211) and the sixth one-way valve (222) allowing the oil in the recovery chamber (111) to flow to the compression chamber (112), and the second damping valve (221) and the fifth one-way valve (212) allowing the oil in the compression chamber (112) to flow to the recovery chamber (111).

8. The active suspension system according to claim 7, characterized in that: The first damping valve (211) and the second damping valve (221) are both solenoid valves.

9. The active suspension system according to claim 1, characterized in that: Also includes: A motor (60), wherein the motor (60) is electrically connected to the bidirectional electro-hydraulic pump (31).

10. A vehicle, characterized in that: include: The active suspension system (100) according to any one of claims 1 to 9.

Images