Hydraulic suspension system, suspension control method and vehicle

Abstract

The invention provides a hydraulic suspension system, a suspension control method and a vehicle, the hydraulic suspension system comprises a shock absorber, the shock absorber comprises a shell and a piston assembly, and the shell is divided into a first cavity and a second cavity by the piston assembly; the control oil way is used for achieving oil circulation between the first cavity and the second cavity, the control oil way comprises a first connector and a second connector, the first connector is connected with the first cavity, and the second connector is connected with the second cavity; a target valve is arranged on the control oil way and used for achieving connection or disconnection between the first cavity and the second cavity. The vehicle body height adjusting efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and in particular to a hydraulic suspension system, a suspension control method, and a vehicle. Background Technology

[0002] With the development of automotive technology, most vehicles are equipped with a suspension system. The suspension system is a structure that connects the wheels to the body, supports the body and reduces road impacts. The suspension system can also adjust the vehicle height to ensure the vehicle's comfort and handling.

[0003] However, current suspension systems are not very effective at adjusting vehicle height. Summary of the Invention

[0004] This invention provides a hydraulic suspension system, a suspension control method, and a vehicle to solve the problem of poor vehicle height adjustment in the prior art.

[0005] In a first aspect, embodiments of the present invention provide a hydraulic suspension system, the hydraulic suspension system comprising:

[0006] A vibration damper, the vibration damper including a housing and a piston assembly, the housing being divided into a first chamber and a second chamber by the piston assembly;

[0007] A control oil circuit is used to realize the flow of oil between the first chamber and the second chamber. The control oil circuit includes a first interface and a second interface, the first interface being connected to the first chamber and the second interface being connected to the second chamber.

[0008] The control oil circuit is equipped with a target valve, which is used to connect or disconnect the first chamber and the second chamber.

[0009] Optionally, the hydraulic suspension system exists in a first state, the control oil circuit includes a first oil circuit, a first interface in the first oil circuit is connected to the first chamber, the target valve is disposed in the first oil circuit and connected to the first chamber; after the hydraulic suspension system controls the piston assembly to move downward to a first height, it controls the target valve to disconnect; the first height is less than the initial height of the hydraulic suspension system;

[0010] Alternatively, the hydraulic suspension system may exist in a second state, where the control oil circuit includes a second oil circuit, a second interface in the second oil circuit is connected to the second chamber, the target valve is located in the second oil circuit and connected to the second chamber; after the hydraulic suspension system controls the piston assembly to move upward to a second height, it controls the target valve to disconnect; the second height is greater than the initial height of the hydraulic suspension system.

[0011] Optionally, the control oil circuit includes a first oil circuit and a second oil circuit; the target valve includes a first valve and a second valve, the first valve being disposed in the first oil circuit and connected to the first chamber; the second valve being disposed in the second oil circuit and connected to the second chamber;

[0012] The hydraulic suspension system is in a first state where, after controlling the piston assembly to move downward to a first height, the first valve is controlled to open; the first height is less than the initial height of the hydraulic suspension system.

[0013] The hydraulic suspension system has a second state. After controlling the piston assembly to move upward to a second height, the second valve is controlled to open. The second height is greater than the initial height of the hydraulic suspension system.

[0014] Optionally, the target valve is a two-position two-way valve.

[0015] Optionally, the control oil circuit includes a third oil circuit for connecting the first chamber and the second chamber.

[0016] Optionally, the third oil circuit includes a hydraulic pump; the hydraulic pump is connected to the first chamber and the target valve, or the hydraulic pump is connected to the second chamber and the target valve.

[0017] Optionally, the third oil circuit further includes a bidirectional motor, and the hydraulic pump is a bidirectional hydraulic pump; wherein the bidirectional motor is connected to the bidirectional hydraulic pump.

[0018] Optionally, the control oil circuit further includes a storage component; the storage component is connected to the first chamber and the second chamber.

[0019] Optionally, the first oil circuit further includes a first check valve; the first check valve is connected to the target valve and the storage component.

[0020] Optionally, the second oil circuit further includes a second check valve; the second check valve is connected to the target valve and the storage component.

[0021] Optionally, the first oil circuit further includes a first damping valve; the first damping valve is connected to the target valve and the storage component.

[0022] Optionally, the second oil circuit further includes a second damping valve; the second damping valve is connected to the target valve and the storage component.

[0023] Optionally, the target valve is a two-position three-way valve.

[0024] In a second aspect, embodiments of the present invention provide a suspension control method, the method being applied to the hydraulic suspension system described in the first aspect, the method comprising:

[0025] Obtain vehicle driving information and / or road surface incentive information;

[0026] Based on the driving information and / or the road surface excitation information, the target valve in the hydraulic suspension system is controlled to switch its operating state to either a flow state or a closed state.

[0027] Optionally, the driving information includes the vehicle speed, and the step of controlling the target valve in the hydraulic suspension system to switch its operating state to a flowing state or a closed state based on the driving information and the road surface excitation information includes:

[0028] When the vehicle speed is not higher than a preset vehicle speed threshold, the target valve in the hydraulic suspension system is switched to the closed state.

[0029] Optionally, the driving information further includes the vehicle's body height, and switching the target valve in the hydraulic suspension system to a closed state includes:

[0030] When the vehicle body height reaches the preset height, the target valve in the hydraulic suspension system is switched to the closed state.

[0031] Optionally, the driving information includes the vehicle speed, and the step of controlling the target valve in the hydraulic suspension system to switch its operating state to a flowing state or a closed state based on the driving information and the road surface excitation information includes:

[0032] When the vehicle speed is higher than a preset vehicle speed threshold, the target valve in the hydraulic suspension system is switched to the flow state.

[0033] Optionally, the preset vehicle speed threshold is 0.

[0034] Optionally, the road surface excitation information includes the road surface excitation frequency, and the driving information further includes vehicle posture information; the method further includes:

[0035] When the road surface excitation frequency is not greater than a preset frequency threshold, a first drive signal is output to the bidirectional motor in the hydraulic suspension system based on the vehicle body posture information, so that the bidirectional motor drives the bidirectional hydraulic pump in the hydraulic suspension system to deliver oil to the first chamber or the second chamber.

[0036] Optionally, the step of outputting a first drive signal to the bidirectional motor in the hydraulic suspension system based on the vehicle body posture information, so as to drive the bidirectional hydraulic pump in the hydraulic suspension system to deliver oil to the first chamber or the second chamber, includes:

[0037] When the wheel connected to the lifting assembly is raised based on the vehicle posture information, a first sub-signal is output to the bidirectional motor in the hydraulic suspension system so that the bidirectional motor drives the bidirectional hydraulic pump in the hydraulic suspension system to deliver oil to the first chamber.

[0038] Optionally, the step of outputting a first drive signal to the bidirectional motor in the hydraulic suspension system based on the vehicle body posture information, so as to drive the bidirectional hydraulic pump in the hydraulic suspension system to deliver oil to the first chamber or the second chamber, includes:

[0039] When the wheel connected to the lifting assembly is lowered based on the vehicle posture information, a second sub-signal is output to the bidirectional motor in the hydraulic suspension system so that the bidirectional motor drives the bidirectional hydraulic pump in the hydraulic suspension system to deliver oil to the second chamber.

[0040] Optionally, the method further includes:

[0041] When the road surface excitation frequency is greater than the preset frequency threshold, the bidirectional hydraulic pump is controlled to switch to the off state.

[0042] Furthermore, based on the vehicle body posture information, a second drive signal is output to the first damping valve or the second damping valve in the hydraulic suspension system, so that the first damping valve or the second damping valve adjusts the valve opening based on the second drive signal.

[0043] Optionally, the step of outputting a second drive signal to the first damping valve or the second damping valve in the hydraulic suspension system based on the vehicle body attitude information, so that the first damping valve or the second damping valve adjusts the valve opening based on the second drive signal, includes:

[0044] When the wheel connected to the lifting assembly is raised based on the vehicle posture information, a second drive signal is output to the second damping valve in the hydraulic suspension system so that the second damping valve adjusts its valve opening based on the second drive signal.

[0045] Optionally, the step of outputting a second drive signal to the first damping valve or the second damping valve in the hydraulic suspension system based on the vehicle body attitude information, so that the first damping valve or the second damping valve adjusts the valve opening based on the second drive signal, includes:

[0046] When the wheel connected to the lifting assembly is lowered based on the vehicle posture information, a second drive signal is output to the first damping valve in the hydraulic suspension system so that the first damping valve adjusts its valve opening based on the second drive signal.

[0047] Fourthly, embodiments of the present invention provide an electronic device, including: a processor, a communication interface, a memory, and a communication bus; wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0048] Memory, used to store computer programs;

[0049] When the processor executes the program stored in the memory, it implements the steps in the suspension control method described in the second aspect above.

[0050] Fifthly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in the suspension control method described in the second aspect above.

[0051] Sixthly, embodiments of the present invention provide a vehicle including the hydraulic suspension system described in the first aspect above.

[0052] Compared with prior art, the present invention has the following advantages:

[0053] In this embodiment of the invention, instead of an air suspension system, a hydraulic suspension system is constructed using shock absorbers, a control oil circuit, and a target valve. By controlling the flow of oil in the control oil circuit, the pressure in the first and second chambers can be adjusted, thereby adjusting the position of the piston assembly to achieve vehicle height adjustment. The hydraulic suspension system improves the efficiency of vehicle height adjustment. Furthermore, this embodiment uses only a single target valve on the control oil circuit. When a height holding requirement exists, the target valve can be closed, thereby closing both the first and second chambers. This maintains the hydraulic pressure difference between the first and second chambers without requiring numerous additional components, achieving long-term vehicle height holding at a lower cost and allowing for higher integration of the hydraulic suspension system.

[0054] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0056] Figure 1 This is a schematic diagram of the structure of a hydraulic suspension system provided in an embodiment of the present invention;

[0057] Figure 2 This is a schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention;

[0058] Figure 3 This is a schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention;

[0059] Figure 4 This is a schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention;

[0060] Figure 5 This is a schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention;

[0061] Figure 6 This is a schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention;

[0062] Figure 7 This is a schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention;

[0063] Figure 8 This is a schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention;

[0064] Figure 9 This is a schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention;

[0065] Figure 10 This is a flowchart of the steps of a suspension control method provided in an embodiment of the present invention;

[0066] Figure 11 A block diagram of an electronic device provided in an embodiment of the present invention.

[0067] Figure label:

[0068] 1-Shock absorber, 11-Housing, 12-Piston assembly, 13-First chamber, 14-Second chamber, 2-Control oil circuit, 21-First interface, 22-Second interface, 3-Target valve, First oil circuit-23, Second oil circuit-24, 31-First valve, 32-Second valve, 25-Third oil circuit, 251-Hydraulic pump, 252-Bidirectional motor, 4-Storage assembly, 51-First check valve, 52-Second check valve, 61-First damping valve, 62-Second damping valve. Detailed Implementation

[0069] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0070] Figure 1 This is a structural schematic diagram of a hydraulic suspension system provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the hydraulic suspension system includes:

[0071] The vibration damper 1 includes a housing 11 and a piston assembly 12. The housing 11 is divided into a first chamber 13 and a second chamber 14 by the piston assembly 12. A control oil circuit 2 is provided to allow oil flow between the first chamber 13 and the second chamber 14. The control oil circuit 2 includes a first interface 21 and a second interface 22. The first interface 21 is connected to the first chamber 13, and the second interface 22 is connected to the second chamber 14. A target valve 3 is provided on the control oil circuit 2 to enable or disable communication between the first chamber 13 and the second chamber 14.

[0072] The target valve described above has two operating states: a flow state and a shut-off state. In the flow state, fluid can flow through the target valve in the control oil circuit, and the first chamber and the second chamber are connected, enabling oil flow between the first chamber and the second chamber. Correspondingly, in the shut-off state, fluid cannot flow through the target valve, and the connection between the first chamber and the second chamber is closed.

[0073] The aforementioned shock absorber can be located between the vehicle body and the wheel, allowing the vehicle body height to be adjusted by regulating the height of the piston assembly within the shock absorber. Specifically, the lower end of the shock absorber can be connected to the wheel, while the piston assembly is connected to the vehicle body.

[0074] In one embodiment, the piston assembly may include a piston and a piston rod, the piston rod being used to connect to the vehicle body, the bottom of the housing being used to connect to the wheel, and the piston dividing the housing into a first chamber and a second chamber.

[0075] Furthermore, such as Figure 1 As shown, the control oil circuit is used to enable oil flow between the first chamber and the second chamber. The first interface is connected to the first chamber, and the second interface is connected to the second chamber. Simultaneously, a target valve is installed on the control oil circuit to enable or disable the connection between the first and second chambers.

[0076] Specifically, the target valve can exist in a flowing state and a closed state. When the target valve is in the flowing state, oil flows between the first chamber and the second chamber through the first interface, the second interface, and the target valve. This oil flow causes the piston assembly to move up or down, thereby adjusting the vehicle height. Conversely, when the target valve is in the closed state, the oil in the control circuit cannot flow through the target valve, thus closing the connection between the first and second chambers. The oil flow between the first and second chambers cannot be maintained, and the piston assembly remains unchanged for a certain period, thereby keeping the vehicle height stationary.

[0077] Figure 2 This is a schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention, as shown below. Figure 2 As shown, the target valve is closed at this time, and the oil in the first chamber and the second chamber cannot flow. As a result, the oil in the first chamber and the second chamber can remain unchanged for a certain period of time, the piston assembly remains unchanged, and the vehicle height can be kept stationary.

[0078] In summary, the embodiments of the present invention do not employ an air suspension system. Instead, they utilize a hydraulic suspension system comprised of shock absorbers, a control oil circuit, and a target valve. By controlling the flow of oil in the control oil circuit, the pressure in the first and second chambers can be adjusted. Furthermore, by adjusting the position of the piston assembly, the vehicle height can be adjusted. This hydraulic suspension system improves the efficiency of vehicle height adjustment. Moreover, the embodiments of the present invention use only a single target valve on the control oil circuit. When a height holding requirement exists, the target valve can be closed, thereby closing both the first and second chambers. This maintains the hydraulic pressure difference between the first and second chambers without requiring numerous additional components, achieving long-term vehicle height holding. This approach is cost-effective and allows for higher integration of the hydraulic suspension system.

[0079] Optionally, Figure 3 This is a structural schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the hydraulic suspension system is in a first state. The control oil circuit 2 includes a first oil circuit 23. The first interface 21 in the first oil circuit 23 is connected to the first chamber 13. The target valve 3 is located in the first oil circuit 23 and connected to the first chamber 13. After the hydraulic suspension system controls the piston assembly to move downward to a first height, it controls the target valve to disconnect. The first height is less than the initial height of the hydraulic suspension system.

[0080] The initial height mentioned above can be preset, such as the original height of the vehicle at the factory, or can be set according to actual needs. This embodiment of the invention does not impose any restrictions on this. Correspondingly, the first height mentioned above is less than the initial height. The first state mentioned above can be a low-height holding state. Specifically, the target valve can be set in the first oil circuit and connected to the first chamber. In this way, by supplying oil to the first chamber, the piston assembly is compressed and moves downward. After the piston assembly moves downward to the first height, the target valve is controlled to open, thus disconnecting the first chamber from the second chamber, so that the piston assembly is held at the first height, achieving low-height holding.

[0081] Optionally, Figure 4 This is a structural schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the hydraulic suspension system is in a second state. The control oil circuit 2 includes a second oil circuit 24. The second interface 22 in the second oil circuit 24 is connected to the second chamber 14. The target valve 3 is located in the second oil circuit 24 and connected to the second chamber 14. After the hydraulic suspension system controls the piston assembly to move upward to a second height, it controls the target valve to disconnect. The second height is greater than the initial height of the hydraulic suspension system.

[0082] The initial height mentioned above can be preset, such as the original height of the vehicle at the factory, or can be set according to actual needs. This embodiment of the invention does not impose any restrictions on this. Correspondingly, the second height mentioned above is greater than the initial height. The second state mentioned above can be a high-height holding state. Specifically, the target valve can be set in the second oil circuit and connected to the second chamber. In this way, by supplying oil to the second chamber, the piston assembly is compressed and moves upward. After the piston assembly moves upward to the second height, the target valve is controlled to disconnect, thus disconnecting the first chamber from the second chamber, allowing the piston assembly to remain at the second height, achieving high-height holding.

[0083] In this way, the position of the target valve can be set according to actual needs, reducing component costs while achieving height-maintaining control.

[0084] Optionally, Figure 5 This is a structural schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the control oil circuit 2 includes a first oil circuit 23 and a second oil circuit 24; the target valve 3 includes a first valve 31 and a second valve 32, the first valve 31 is disposed in the first oil circuit 23 and connected to the first chamber 13; the second valve 32 is disposed in the second oil circuit 24 and connected to the second chamber 14.

[0085] Specifically, in the first state (low height holding state), the hydraulic suspension system can supply oil to the first chamber. After the piston assembly is squeezed and moves downward to the first height, the first valve is controlled to disconnect, thus disconnecting the first chamber from the second chamber, so that the piston assembly is held at the first height, achieving low height holding.

[0086] Correspondingly, in the second state (high height holding), the hydraulic suspension system can supply oil to the second chamber, and the piston assembly is squeezed and moves upward. After moving to the second height, the second valve is controlled to disconnect, thus disconnecting the first chamber from the second chamber, so that the piston assembly is held at the second height, achieving high height holding.

[0087] Furthermore, the first state and the second state mentioned above can be determined based on the vehicle's driving status or driver's instructions, and this embodiment of the invention does not impose any restrictions on this.

[0088] In this way, the first state and the second state can be achieved through two target valves respectively, improving the flexibility of vehicle height control.

[0089] Optionally, the target valve is a two-position two-way valve.

[0090] Specifically, a two-position, two-way valve refers to a valve with two operating states and connecting to two passages. The target valve can include a flow state and a closed state, and the target valve can connect to a first chamber and a second chamber, thereby connecting two passages. For example, as... Figure 2 , 3 As shown, the target valve connects the first chamber and the second chamber.

[0091] Optional, Figure 6 This is a structural schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the hydraulic suspension system also includes a bidirectional motor 252, which is connected to a bidirectional hydraulic pump 251.

[0092] Optionally, such as Figure 6 As shown, the control oil circuit 2 includes a third oil circuit 25, which is used to connect the first chamber 13 and the second chamber 14.

[0093] Optionally, the third oil circuit 25 includes a hydraulic pump 251; the hydraulic pump 251 is connected to the first chamber 13 and the target valve 3, or the hydraulic pump 251 is connected to the second chamber 14 and the target valve 3.

[0094] The third oil circuit 25 also includes a bidirectional motor 252, and the hydraulic pump 251 is a bidirectional hydraulic pump; wherein, the bidirectional motor 252 is connected to the bidirectional hydraulic pump.

[0095] A bidirectional hydraulic pump refers to a pump capable of transmitting fluid in two directions. Specifically, the bidirectional hydraulic pump is connected to a second chamber and simultaneously connected to a first chamber via a target valve. This allows the bidirectional hydraulic pump to transmit fluid to both the second and first chambers. Alternatively, the bidirectional hydraulic pump is connected to both the first and second chambers, allowing it to transmit oil to both the first and second chambers.

[0096] The bidirectional motor 252 is configured to drive the bidirectional hydraulic pump to deliver oil to the first chamber or the second chamber.

[0097] Specifically, a bidirectional motor refers to a motor that can rotate in both directions. A bidirectional motor can be electrically connected to a bidirectional hydraulic pump, and the bidirectional motor can drive the bidirectional hydraulic pump to deliver oil upwards or downwards by rotating in both directions.

[0098] By configuring a bidirectional motor, its forward and reverse rotation can be controlled by adjusting the input current of the bidirectional motor. Furthermore, by controlling the forward and reverse rotation of the bidirectional motor, the supply of oil to the first or second chamber can be controlled, thereby lowering or raising the vehicle body and further improving the efficiency of vehicle height adjustment.

[0099] Optionally, the control oil circuit further includes a storage component; the storage component is connected to the first chamber and the second chamber.

[0100] Optional, Figure 7 This is a structural schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention, as shown below. Figure 7 As shown, the hydraulic suspension system may also include a storage component 4; the storage component 4 is connected to the first chamber 13 and the second chamber 14.

[0101] The aforementioned storage component can be a gas bag or an accumulator, which can store a certain amount of compressed gas. When the oil in the first or second chamber changes, the pressure of the storage component also changes. This allows the storage component to replenish or store the oil flowing out during the piston assembly's lifting and lowering process, thus mitigating pressure fluctuations in the system. Specifically, the storage component can control the flow of oil from the first chamber to the second chamber via air pressure, or vice versa.

[0102] Optionally, the first oil circuit further includes a first check valve; the first check valve is connected to the target valve and the storage component.

[0103] Optionally, the second oil circuit further includes a second check valve; the second check valve is connected to the target valve and the storage component.

[0104] The aforementioned one-way valve refers to a valve that allows flow in only one direction. Specifically, the first one-way valve can connect to the target valve and the storage component. The storage component is connected to the target valve through the first one-way valve, so that the storage component can use air pressure to allow oil to flow through the first one-way valve into the target valve and enter the first chamber or the second chamber.

[0105] The storage component can also be connected to the target valve via a second check valve. In this case, the storage component can use air pressure to allow oil to flow into the target valve through the second check valve and enter the first or second chamber.

[0106] Figure 8 This is a structural schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention, as shown below. Figure 8 As shown, Figure 8 Taking the setting of a target valve in the first oil circuit as an example, the first check valve 51 can be connected to the storage component and the second chamber, and the second check valve 52 can be connected to the storage component 4 and the target valve 3. Then the storage component can use air pressure to make the oil flow into the second chamber 14 through the first check valve 51, and make the oil flow into the target valve 3 through the second check valve 52 and enter the first chamber 13.

[0107] Optionally, the first oil circuit further includes a first damping valve; the first damping valve is connected to the target valve and the storage component.

[0108] Optionally, the second oil circuit further includes a second damping valve; the second damping valve is connected to the target valve and the storage component.

[0109] Optionally, Figure 9 This is a structural schematic diagram of another hydraulic suspension system provided in an embodiment of the present invention, as shown below. Figure 9 As shown, the hydraulic suspension system also includes a first damping valve 61 and a second damping valve 62.

[0110] One end of the first damping valve 61 is connected to the first chamber through the target valve, and the other end of the first damping valve 61 is connected to the storage component;

[0111] One end of the second damping valve 62 is connected to the second chamber 14, and the other end of the second damping valve 62 is connected to the storage component.

[0112] Specifically, by setting a damping valve, the oil squeezed in the first or second chamber can flow into the storage component through the damping valve. In this way, the damping force required by the vehicle can be adjusted by the damping valve, so that the oil squeezed in the first or second chamber can be discharged through the damping valve.

[0113] Optionally, the target valve is a two-position three-way valve.

[0114] Specifically, a two-position three-way valve refers to a valve with two operating states and connecting three passages. As mentioned above, the target valve is used to connect the first chamber and the second chamber, and the storage component is also used to connect the first chamber and the second chamber. Based on this, the storage component can be connected to the first chamber or the second chamber through the target valve. Therefore, the target valve needs to connect the first chamber, the second chamber, and the storage component. Based on this, the target valve is a two-position three-way valve.

[0115] Figure 10 This is a flowchart of the steps of a suspension control method provided in an embodiment of the present invention, as follows: Figure 10 As shown, the method includes:

[0116] Step 101: Obtain vehicle driving information and / or road surface incentive information.

[0117] Step 102: Based on the driving information and / or the road surface excitation information, control the target valve in the hydraulic suspension system to switch its working state to either a flow state or a shut-off state.

[0118] This invention can be applied to a suspension controller in a hydraulic suspension system, but it can also be applied to other vehicle-mounted controllers; this invention does not limit the application. The aforementioned driving information may include information such as wheel driving mode, vehicle speed, steering wheel angle, vehicle acceleration, and battery charge signal, used to characterize the vehicle's driving state. The aforementioned road excitation information may include information such as road excitation signals and road excitation frequency, used to characterize the current road conditions.

[0119] Specifically, road surface signals, height signals, suspension displacement, and suspension acceleration signals can be collected using onboard sensors integrated into the vehicle. Furthermore, a road surface excitation model can be employed to calculate road surface excitation information using the signals collected by the onboard sensors. Of course, pre-set road surface excitation algorithms or statistical characteristics can also be used for calculation; this embodiment of the invention does not impose any limitations on this approach.

[0120] Furthermore, by obtaining driving information and / or road surface stimulus information, the vehicle's current driving status and road conditions can be determined. Based on this, the flow or closure of the target valve can be controlled. For example, when the vehicle is stationary, the target valve can be closed to maintain a constant piston assembly height, thereby ensuring a constant vehicle height. This facilitates passenger entry and exit, loading / unloading, and trunk loading. Conversely, when the vehicle is turning, the target valve can be opened to adaptively adjust the vehicle height through the flow of fluid between the first and second chambers.

[0121] Specifically, in embodiments of the present invention, a state switching signal can be generated based on driving information and / or road surface excitation information, and the state switching signal can be input to the target valve, so that the target valve can switch states based on the state switching signal.

[0122] In summary, the suspension control method provided by the embodiments of the present invention can control the target valve in the hydraulic suspension system based on driving information and / or road excitation information. It can adjust the vehicle height according to the actual driving state of the vehicle or keep the vehicle at a certain height, thus ensuring the comfort of the vehicle and the flexibility of height adjustment.

[0123] Optionally, the aforementioned driving information includes the vehicle speed, and the step of controlling the target valve in the hydraulic suspension system to switch its operating state to a flowing state or a closed state based on the driving information and the road surface excitation information includes:

[0124] S1021. When the vehicle speed is not higher than a preset vehicle speed threshold, control the target valve in the hydraulic suspension system to switch to the closed state.

[0125] The aforementioned preset vehicle speed threshold can be pre-set, such as 0.5 m / s or 0.3 m / s. In one case, the aforementioned preset vehicle speed threshold can also be 0. The specific setting can be customized according to the actual situation, and the embodiments of the present invention do not impose any restrictions on this.

[0126] Specifically, when the vehicle speed is not higher than the preset speed threshold, the vehicle is usually slow or stationary. This is typically a situation where people are getting on or off the vehicle or retrieving items from inside. In order to ensure the safety and comfort of the people in this situation, the vehicle height can be kept constant. Therefore, in this embodiment of the invention, the target valve in the hydraulic suspension system can be switched to the closed state, thereby preventing the oil from flowing in the first chamber and the second chamber. By maintaining the height of the piston assembly, the vehicle height can be maintained.

[0127] S1022. When the vehicle speed is higher than a preset vehicle speed threshold, control the target valve in the hydraulic suspension system to switch to the flow state.

[0128] Correspondingly, when the vehicle speed is higher than the preset speed threshold, the vehicle is often in a non-slow driving state. The hydraulic suspension system needs to adjust the vehicle height according to the specific conditions of the vehicle in the driving state. At this time, the target valve can be controlled to switch to the flow state to facilitate the flow of oil through the first chamber and the second chamber to achieve the adjustment of the vehicle height.

[0129] Optionally, the aforementioned driving information also includes the vehicle's body height, and the aforementioned control of switching the target valve in the hydraulic suspension system to a closed state includes:

[0130] S10211. When the vehicle height reaches the preset height, control the target valve in the hydraulic suspension system to switch to the closed state.

[0131] The aforementioned preset height can be a pre-set reference height or a height determined by receiving signals from the driver. It can be set according to actual needs, and this embodiment of the invention does not impose any limitations on this. Specifically, since there is often a need for passengers to get on or off or for cargo to be loaded or unloaded when the vehicle is stationary or moving slowly, it is necessary to keep the vehicle height at a low position. Therefore, a low preset height can be set in advance.

[0132] Specifically, in some cases, after a vehicle passes through a relatively bumpy road, the vehicle body often remains at a high height. If the vehicle slows down or stops at this time, and the vehicle body still remains at a high height, it will be difficult for people to get on and off, as well as for loading and unloading goods. In order to avoid this situation, the embodiments of the present invention can control the target valve to close when the vehicle body height reaches a preset height.

[0133] Optionally, if the vehicle height does not reach the preset height, the present invention can also deliver oil to the first chamber or the second chamber through a bidirectional hydraulic pump, causing the piston assembly to move up or down until the vehicle height reaches the preset height.

[0134] Optionally, the aforementioned road surface excitation information includes the road surface excitation frequency, and the aforementioned driving information also includes vehicle posture information. Specifically, embodiments of the present invention may further include:

[0135] S103. When the road surface excitation frequency is not greater than a preset frequency threshold, a first drive signal is output to the bidirectional motor in the hydraulic suspension system based on the vehicle body posture information, so that the bidirectional motor drives the bidirectional hydraulic pump in the hydraulic suspension system to deliver oil to the first chamber or the second chamber.

[0136] The aforementioned road surface excitation frequency refers to the signal frequency of the road surface excitation signal, which can characterize the smoothness of the current road surface to a certain extent. The higher the road surface excitation frequency, the lower the smoothness. The aforementioned preset frequency threshold can be pre-set, for example, it can be 5HZ, 7HZ, 8HZ, etc., and can be set according to the actual needs of the vehicle. This embodiment of the invention does not impose any restrictions on this.

[0137] The aforementioned vehicle posture information is used to characterize the vehicle posture, which may include tilt and stable states. The tilt state may include tilting to the left, tilting to the right, tilting forward, and tilting backward. The required vehicle height adjustment operation is different in different states.

[0138] Specifically, when the road excitation frequency is not greater than the preset frequency threshold, the vehicle is usually driving on a relatively stable road surface. In order to maximize the comfort of passengers, the vehicle height can be actively adjusted by a bidirectional motor. The first drive signal can be generated and output based on the vehicle posture information, so that the bidirectional motor drives the bidirectional hydraulic pump to deliver oil to the first chamber or the second chamber.

[0139] For example, when the vehicle's posture information indicates a leftward tilt, the vehicle is often making a left turn. In this situation, the left wheel is depressed while the right wheel is raised. To ensure vehicle stability, the left side of the vehicle needs to be raised and the right side lowered. For the hydraulic suspension system corresponding to the right wheel, a bidirectional motor can drive a bidirectional hydraulic pump to deliver hydraulic fluid upwards. After the fluid flows through the target valve into the first chamber, it pushes the piston assembly downwards, compressing the fluid in the second chamber and causing it to flow back to the bidirectional hydraulic pump. If the hydraulic suspension system also includes an air bag, the air bag can use air pressure to push some of the lost fluid back to the bidirectional hydraulic pump, thus balancing the system pressure.

[0140] Optionally, the above-described S103 embodiment of the present invention may specifically include:

[0141] S1031. When the wheel connected to the lifting assembly is raised based on the vehicle posture information, a first sub-signal is output to the bidirectional motor in the hydraulic suspension system so that the bidirectional motor drives the bidirectional hydraulic pump in the hydraulic suspension system to deliver oil to the first chamber.

[0142] Optionally, the above-described S103 embodiment of the present invention may further include:

[0143] S1032. When the wheel connected to the lifting assembly is lowered based on the vehicle posture information, a second sub-signal is output to the bidirectional motor in the hydraulic suspension system so that the bidirectional motor drives the bidirectional hydraulic pump in the hydraulic suspension system to deliver oil to the second chamber.

[0144] Meanwhile, for the hydraulic suspension system corresponding to the left wheel, the bidirectional motor drives the bidirectional hydraulic pump to deliver oil downwards. The oil enters the second chamber, pushing the piston assembly upwards. The oil in the first chamber is compressed and flows back to the bidirectional hydraulic pump through the target valve. Similarly, if the hydraulic suspension system also includes an air bag, the air bag can use air pressure to push some of the lost oil back to the bidirectional hydraulic pump, thus balancing the system pressure.

[0145] Thus, in this embodiment of the invention, the vehicle height can be actively adjusted via a bidirectional motor by selecting the road excitation frequency, thereby keeping the vehicle stable and improving vehicle comfort.

[0146] Optionally, embodiments of the present invention may further include:

[0147] S104. When the road surface excitation frequency is greater than the preset frequency threshold, control the bidirectional hydraulic pump in the hydraulic suspension system to switch to the off state.

[0148] And, S105, based on the vehicle body posture information, output a second drive signal to the first damping valve or the second damping valve in the hydraulic suspension system, so that the first damping valve or the second damping valve adjusts the valve opening based on the second drive signal.

[0149] In cases where the road excitation frequency exceeds a preset frequency threshold, the vehicle is often traveling on a bumpy road. In such cases, actively adjusting the vehicle height would actually reduce the vehicle's comfort. In this situation, the vehicle's comfort should be maintained by the hydraulic damping in the first and second chambers. Therefore, in this embodiment of the invention, the bidirectional hydraulic pump can be switched to the off state, eliminating the need to control the flow of hydraulic fluid in the first and second chambers through the bidirectional hydraulic pump.

[0150] Specifically, the larger the valve opening of the damping valve, the smaller the damping force. The damping force generated by the oil flowing out of the first and second chambers can be adjusted by the first damping valve and the second damping valve.

[0151] Optionally, the above-described S105 embodiment of the present invention may specifically include:

[0152] S1051. When the wheel connected to the lifting assembly is raised based on the vehicle body posture information, a second drive signal is output to the second damping valve in the hydraulic suspension system so that the second damping valve adjusts the valve opening based on the second drive signal.

[0153] Optionally, the above-described S105 embodiment of the present invention may further include:

[0154] S1052. When the wheel connected to the lifting assembly is lowered based on the vehicle body posture information, a second drive signal is output to the first damping valve in the hydraulic suspension system so that the first damping valve adjusts the valve opening based on the second drive signal.

[0155] Specifically, the aforementioned vehicle posture information is used to characterize the vehicle posture, and may include states such as left tilt, right tilt, forward tilt, backward tilt, and stable.

[0156] When the vehicle body tilts and the wheels bounce, the piston assembly moves downward, the oil in the second chamber is squeezed, flows through the second damping valve, part of it enters the air bag, and the other part enters the first chamber through the first check valve and the target valve. In this embodiment of the invention, a second drive signal can be output to the second damping valve, so that the second damping valve adjusts the valve opening.

[0157] Correspondingly, when the vehicle body tilts and the wheels bounce, the piston assembly moves upward, the oil in the first chamber is squeezed, flows through the first damping valve, part of it enters the air bag, and the other part enters the second chamber through the second one-way valve. In this embodiment of the invention, a second drive signal can be output to the first damping valve, so that the first damping valve adjusts the valve opening.

[0158] Specifically, the aforementioned second driving signal can be a current signal, which can adjust the valve opening; the larger the current, the smaller the valve opening. Meanwhile, since the valve opening is negatively correlated with the damping force, a smaller damping force is often required to ensure vehicle comfort. Therefore, this embodiment of the invention can determine the degree of wheel bounce or sway based on the vehicle body tilt. When the degree of wheel bounce or sway is high, a smaller current signal can be output as the second driving signal, resulting in a larger valve opening and a smaller damping force. Conversely, when the degree of wheel bounce or sway is low, a larger current signal can be output as the second driving signal, resulting in a smaller valve opening and a larger damping force.

[0159] It should be noted that a hydraulic suspension system is a mechanism that connects the wheels to the vehicle body, and its main function is to support the vehicle's stable driving and mitigate impacts from the road surface. Based on whether the hydraulic suspension system's force is adjustable, suspensions can be divided into passive suspensions and active suspensions. Based on whether the actuator is active, active suspensions are further divided into semi-active suspensions and fully active suspensions. Active suspensions include height adjustment, stiffness adjustment, and damping adjustment functions. Currently, related technologies often use air suspension systems or hydraulic suspension systems where a motor pump provides the active force. Air suspension systems receive height signals from a height sensor. When the height signal is less than the target height, they control the opening of the first and second switching valves, causing the air compressor to rotate forward and drive the gas in the air tank to flow to the air springs. When the height signal is less than the target height, they control the opening of the first and second switching valves, causing the air compressor to rotate in reverse and drive the gas in the air springs to flow to the air tank, until the height signal equals the target height, at which point the first and second switching valves close. Alternatively, the air pump can be controlled based on the inflation / deflation volume to inflate the air spring assembly via an air tank, and the deflation solenoid valve assembly can be opened to deflate the air spring assembly, thereby achieving height adjustment of the hydraulic suspension system. However, height adjustment achieved by inflating and deflating the air springs is slow, generally not exceeding 5mm / s, thus affecting the user experience. Furthermore, air springs have a short lifespan and are prone to leakage. In contrast, a hydraulic suspension system powered by an electric motor pump is connected to a hydraulic pump via hydraulic lines. The hydraulic pump inflates and deflates the liftable shock absorber assembly to stretch or compress the shock absorber, achieving rapid vehicle height adjustment. However, maintaining the height requires the hydraulic pump to operate actively to maintain the pressure difference between the pump inlet and outlet. The high power consumption of the electric motor prevents prolonged height maintenance.

[0160] This invention does not employ an air suspension system. Instead, it uses a target valve, a bidirectional hydraulic pump, and a lifting assembly to form a hydraulic suspension system. The bidirectional hydraulic pump transmits oil to adjust the position of the piston assembly, thereby adjusting the vehicle height. This hydraulic suspension system improves the efficiency of vehicle height adjustment. Furthermore, this invention uses only a single valve with both open and closed states. When there is a static height requirement, the target valve can be closed. This process does not require active operation of the hydraulic pump, maintaining the hydraulic pressure difference between the first and second chambers. This eliminates the need for numerous additional components, achieving long-term vehicle height maintenance, reducing costs, and enabling higher integration of the hydraulic suspension system. The suspension control method provided by this invention can control the target valve in the hydraulic suspension system based on driving information and road surface excitation information. It can adjust the vehicle height according to the actual driving state or maintain a constant height, ensuring vehicle comfort and flexible height adjustment. This solves the problems of slow lifting speed, short service life, and air leakage in air suspension systems, and also enables hydraulic suspension systems to quickly adjust and maintain different heights, further improving vehicle passability, handling, and comfort.

[0161] This invention also provides an electronic device, such as... Figure 11 As shown, it includes a processor 501, a communication interface 502, a memory 503, and a communication bus 504, wherein the processor 501, the communication interface 502, and the memory 503 communicate with each other through the communication bus 504.

[0162] Memory 503 is used to store computer programs.

[0163] When the processor 501 executes the program stored in the memory 503, it performs the following steps: acquiring vehicle driving information and / or road surface excitation information; and controlling the target valve in the hydraulic suspension system to switch its working state to a flow state or a closed state based on the driving information and / or the road surface excitation information.

[0164] The processor 501 can also implement other steps in the suspension control method described above, which will not be elaborated here.

[0165] The hydraulic suspension system, suspension control method, and vehicle provided in this invention embodiment do not employ an air suspension system. Instead, they utilize a target valve, a bidirectional hydraulic pump, and a lifting assembly to form a hydraulic suspension system. The bidirectional hydraulic pump transmits oil to adjust the position of the piston assembly, thereby achieving vehicle height adjustment. This hydraulic suspension system improves the efficiency of vehicle height adjustment. Furthermore, this invention embodiment uses only a single valve with both open and closed states. When there is a static height requirement, the target valve can be closed. This process does not require active operation of the hydraulic pump, maintaining the hydraulic pressure difference between the first and second chambers. This eliminates the need for numerous additional components, enabling long-term vehicle height maintenance, lower costs, and higher integration of the hydraulic suspension system. The suspension control method provided in this invention embodiment can control the target valve in the hydraulic suspension system based on driving information and road surface excitation information. It can adjust the vehicle height or maintain a constant height according to the actual driving state, ensuring both vehicle comfort and flexible height adjustment. It solves the problems of slow lifting speed, short service life and air leakage of air suspension system, and also enables hydraulic suspension system to quickly adjust and maintain different height states, further improving the vehicle's passability, handling and comfort.

[0166] The communication bus mentioned in the above electronic devices can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not indicate that there is only one bus or one type of bus.

[0167] The communication interface is used for communication between the aforementioned electronic devices and other devices.

[0168] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0169] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0170] In another embodiment of the present invention, a computer-readable storage medium is also provided, which stores instructions that, when executed on a computer, cause the computer to perform the suspension control method described in the above embodiments.

[0171] In another embodiment of the present invention, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to execute the suspension control method described in the above embodiments.

[0172] In another embodiment of the present invention, a vehicle is also provided, which includes the hydraulic suspension system described in the above embodiments.

[0173] The electronic device can also perform other steps in the suspension control method described above, which will not be elaborated here.

[0174] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk (SSD)).

[0175] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0176] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. For embodiments of devices, electronic devices, computer-readable storage media, and computer program products containing instructions, the descriptions are relatively simple because they are basically similar to the method embodiments; relevant parts can be referred to the descriptions of the method embodiments.

[0177] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A hydraulic suspension system, characterized in that, The hydraulic suspension system includes: A vibration damper, the vibration damper including a housing and a piston assembly, the housing being divided into a first chamber and a second chamber by the piston assembly; A control oil circuit is used to realize the flow of oil between the first chamber and the second chamber. The control oil circuit includes a first interface and a second interface, the first interface being connected to the first chamber and the second interface being connected to the second chamber. The control oil circuit is equipped with a target valve, which is used to connect or disconnect the first chamber and the second chamber.

2. The system according to claim 1, characterized in that, The hydraulic suspension system exists in a first state. The control oil circuit includes a first oil circuit, a first interface in the first oil circuit is connected to the first chamber, and the target valve is located in the first oil circuit and connected to the first chamber. After the hydraulic suspension system controls the piston assembly to move downward to a first height, it controls the target valve to disconnect. The first height is less than the initial height of the hydraulic suspension system. Alternatively, the hydraulic suspension system may exist in a second state, where the control oil circuit includes a second oil circuit, a second interface in the second oil circuit is connected to the second chamber, the target valve is located in the second oil circuit and connected to the second chamber; after the hydraulic suspension system controls the piston assembly to move upward to a second height, it controls the target valve to disconnect; the second height is greater than the initial height of the hydraulic suspension system.

3. The system according to claim 1, characterized in that, The control oil circuit includes a first oil circuit and a second oil circuit; the target valve includes a first valve and a second valve, the first valve being disposed in the first oil circuit and connected to the first chamber; the second valve being disposed in the second oil circuit and connected to the second chamber; The hydraulic suspension system is in a first state where, after controlling the piston assembly to move downward to a first height, the first valve is controlled to open; the first height is less than the initial height of the hydraulic suspension system. The hydraulic suspension system has a second state. After controlling the piston assembly to move upward to a second height, the second valve is controlled to open. The second height is greater than the initial height of the hydraulic suspension system.

4. The system according to claim 2, characterized in that, The target valve is a two-position, two-way valve.

5. The system according to claim 1, characterized in that, The control oil circuit includes a third oil circuit, which is used to connect the first chamber and the second chamber.

6. The system according to claim 5, characterized in that, The third oil circuit includes a hydraulic pump; the hydraulic pump is connected to the first chamber and the target valve, or the hydraulic pump is connected to the second chamber and the target valve.

7. The system according to claim 6, characterized in that, The third oil circuit also includes a bidirectional motor, and the hydraulic pump is a bidirectional hydraulic pump; wherein, the bidirectional motor is connected to the bidirectional hydraulic pump.

8. The system according to claim 2 or 3, characterized in that, The control oil circuit also includes a storage component; the storage component is connected to the first chamber and the second chamber.

9. The system according to claim 8, characterized in that, The first oil circuit also includes a first check valve; the first check valve is connected to the target valve and the storage component.

10. The system according to claim 8, characterized in that, The second oil circuit also includes a second check valve; the second check valve is connected to the target valve and the storage component.

11. The system according to claim 8, characterized in that, The first oil circuit further includes a first damping valve; the first damping valve is connected to the target valve and the storage component.

12. The system according to claim 8, characterized in that, The second oil circuit also includes a second damping valve; the second damping valve is connected to the target valve and the storage component.

13. The system according to claim 8, characterized in that, The target valve is a two-position three-way valve.

14. A suspension control method, characterized in that, The method is applied to the hydraulic suspension system according to any one of claims 1-13.

15. The method according to claim 14, characterized in that, The method includes: Obtain vehicle driving information and / or road surface incentive information; Based on the driving information and / or the road surface excitation information, the target valve in the hydraulic suspension system is controlled to switch its operating state to either a flow state or a closed state.

16. The method according to claim 15, characterized in that, The driving information includes the vehicle speed. The step of controlling the target valve in the hydraulic suspension system to switch its operating state to a flowing state or a closed state based on the driving information and / or the road surface excitation information includes: When the vehicle speed is not higher than a preset vehicle speed threshold, the target valve in the hydraulic suspension system is switched to the closed state.

17. The method according to claim 16, characterized in that, The driving information also includes the vehicle's body height, and the control of the target valve in the hydraulic suspension system to switch to a closed state includes: When the vehicle body height reaches a preset height, the target valve in the hydraulic suspension system is switched to the closed state; the preset height is less than the initial height of the hydraulic suspension system, or the preset height is greater than the initial height of the hydraulic suspension system.

18. The method according to claim 15, characterized in that, The driving information includes the vehicle speed. The step of controlling the target valve in the hydraulic suspension system to switch its operating state to a flowing state or a closed state based on the driving information and / or the road surface excitation information includes: When the vehicle speed is higher than a preset vehicle speed threshold, the target valve in the hydraulic suspension system is switched to the flow state.

19. The method according to claim 16 or 18, characterized in that, The preset vehicle speed threshold is 0.

20. The method according to claim 15, characterized in that, The road surface excitation information includes the road surface excitation frequency, and the driving information also includes vehicle posture information; the method further includes: When the road surface excitation frequency is not greater than a preset frequency threshold, a first drive signal is output to the bidirectional motor in the hydraulic suspension system based on the vehicle body posture information, so that the bidirectional motor drives the hydraulic pump in the hydraulic suspension system to deliver oil to the first chamber or the second chamber.

21. The method according to claim 20, characterized in that, The step of outputting a first drive signal to the bidirectional motor in the hydraulic suspension system based on the vehicle posture information, so that the bidirectional motor drives the hydraulic pump in the hydraulic suspension system to deliver oil to the first chamber or the second chamber, includes: When the wheel connected to the shock absorber is raised based on the vehicle posture information, a first sub-signal is output to the bidirectional motor in the hydraulic suspension system so that the bidirectional motor drives the hydraulic pump in the hydraulic suspension system to deliver oil to the first chamber.

22. The method according to claim 20, characterized in that, The step of outputting a first drive signal to the bidirectional motor in the hydraulic suspension system based on the vehicle posture information, so that the bidirectional motor drives the bidirectional hydraulic pump in the hydraulic suspension system to deliver oil to the first chamber or the second chamber, includes: When the wheel connected to the shock absorber is lowered based on the vehicle posture information, a second sub-signal is output to the bidirectional motor in the hydraulic suspension system so that the bidirectional motor drives the hydraulic pump in the hydraulic suspension system to deliver oil to the second chamber.

23. The method according to claim 20, characterized in that, The method further includes: If the road surface excitation frequency is greater than the preset frequency threshold, control the hydraulic pump to switch to the off state; Furthermore, based on the vehicle body posture information, a second drive signal is output to the first damping valve or the second damping valve in the hydraulic suspension system, so that the first damping valve or the second damping valve adjusts the valve opening based on the second drive signal.

24. The method according to claim 23, characterized in that, The step of outputting a second drive signal to a first damping valve or a second damping valve in the hydraulic suspension system based on the vehicle body posture information, so that the first damping valve or the second damping valve adjusts its valve opening based on the second drive signal, includes: When the wheel connected to the shock absorber is raised based on the vehicle posture information, a second drive signal is output to the second damping valve in the hydraulic suspension system so that the second damping valve adjusts its valve opening based on the second drive signal.

25. The method according to claim 23, characterized in that, The step of outputting a second drive signal to a first damping valve or a second damping valve in the hydraulic suspension system based on the vehicle body posture information, so that the first damping valve or the second damping valve adjusts its valve opening based on the second drive signal, includes: When the wheel connected to the shock absorber is lowered based on the vehicle posture information, a second drive signal is output to the first damping valve in the hydraulic suspension system so that the first damping valve adjusts its valve opening based on the second drive signal.

26. A vehicle, characterized in that, Includes the hydraulic suspension system as described in any one of claims 1-13.

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