Suspension system, vehicle and method of adjustment

Abstract

The application provides a suspension system, a vehicle and a regulating method, the vehicle comprising the suspension system, the suspension system comprising a main accumulator and an actuator. The main accumulator has a first liquid storage cavity for storing oil; the actuator comprises a regulating device, the regulating device comprising a regulating part and a mounting cavity, at least part of the regulating part being movably arranged in the mounting cavity, a regulating end of the regulating part extending out of the mounting cavity and being connected with a vehicle body; the mounting cavity comprises a compression cavity and a recovery cavity, the regulating part being arranged in the recovery cavity, the compression cavity being below the recovery cavity, and the compression cavity being in communication with the first liquid storage cavity. Oil is injected into the compression cavity through the first liquid storage cavity, so that the regulating part moves upward under the action of the oil pressure, thereby driving the vehicle body to move upward, and the problem of low steady-state regulating ability and low vehicle height maintaining ability of the suspension system in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and more specifically, to a suspension system, a vehicle, and an adjustment method. Background Technology

[0002] Existing active suspension systems consist of four active actuators, a controller, sensors, and a power supply system. The active actuators are driven by an electric motor and deliver power to the suspension via mechanical or hydraulic transmission, significantly improving vehicle comfort and handling.

[0003] However, since the main power of active suspension can only be output for short periods, prolonged output would consume a large amount of electrical energy and cause problems such as overheating of the motor and controller, leading to functional degradation after system failure. Therefore, the steady-state vehicle height adjustment and vehicle height maintenance capabilities of existing active suspension technologies are relatively low. Summary of the Invention

[0004] The main objective of this invention is to provide a suspension system, vehicle, and adjustment method to solve the problems of low steady-state vehicle height adjustment capability and low vehicle height maintenance capability of existing suspension systems.

[0005] To achieve the above objectives, according to a first aspect of the present invention, a suspension system is provided for adjusting the height of a vehicle body. The suspension system includes: a main accumulator having a first reservoir for storing oil; an actuator including an adjustment device, the adjustment device including an adjustment section and a mounting cavity, at least a portion of the adjustment section being movably disposed within the mounting cavity, the adjustment end of the adjustment section extending from the mounting cavity and connected to the vehicle body to drive the vehicle body to rise or fall via the adjustment section; wherein the mounting cavity includes a compression cavity and a return cavity, the adjustment section being disposed within the return cavity; the compression cavity is located below the return cavity, the compression cavity communicating with the first reservoir, and oil being injected into the compression cavity through the first reservoir to cause the adjustment section to move upward under the action of oil pressure.

[0006] Furthermore, the actuator also includes: an angle accumulator having a second liquid storage chamber connected to a recovery chamber, through which oil is injected into the recovery chamber so that the regulating part moves downward under the action of the oil pressure.

[0007] Furthermore, the actuator also includes: a first pressure detection component, connected to the angle accumulator, for detecting the pressure on the angle accumulator side.

[0008] Furthermore, the actuator also includes: a main connecting pipe, the two ends of which are connected to the first liquid storage chamber and the compression chamber respectively; and a drive pump, which is mounted on the main connecting pipe and connected to the main connecting pipe.

[0009] Furthermore, the actuator also includes a throttle valve, which is installed on the main connecting pipe to control the flow rate of oil in the main connecting pipe.

[0010] Furthermore, the suspension system also includes a second pressure detection component, connected to the main accumulator, for detecting the pressure in the first reservoir.

[0011] Furthermore, the adjustment unit includes: an adjustment rod, one end of which extends out of the recovery chamber and is connected to the vehicle body; a piston, the end of the adjustment rod away from the vehicle body being connected to the piston, which drives the adjustment rod to move, thereby raising and lowering the vehicle body; wherein, the piston is provided with a first channel and a second channel, the first channel being provided with a first check valve to allow the oil in the recovery chamber to flow into the compression chamber; and / or the second channel being provided with a second check valve to allow the oil in the compression chamber to flow into the recovery chamber.

[0012] Furthermore, there are multiple actuators, which are evenly spaced along the circumference of the vehicle body. The first liquid storage chamber of the main accumulator is connected to the compression chamber of the adjustment device of each actuator.

[0013] According to a second aspect of the present invention, a vehicle is provided, including a vehicle body, a suspension system, and vehicle height sensors. The suspension system and vehicle height sensors are respectively disposed on the vehicle body. The suspension system includes multiple actuators, and there are multiple vehicle height sensors, with each of the multiple vehicle height sensors connected to one of the multiple actuators in a corresponding manner. The suspension system is the aforementioned suspension system. The vehicle also includes a control module, which is communicatively connected to all of the multiple vehicle height sensors so that data detected by the multiple vehicle height sensors are transmitted to the control module.

[0014] According to a third aspect of the present invention, an adjustment method is provided, applicable to the aforementioned vehicle, the adjustment method comprising: detecting a pressure on the main accumulator side as a second pressure P0; detecting a pressure on the corner accumulator side as a first pressure P1; comparing the second pressure P0 and the first pressure P1; and controlling the flow rate of oil supplied from the first reservoir chamber to the compression chamber based on the comparison result.

[0015] Furthermore, based on the comparison results, the method for controlling the flow rate of oil supplied from the main accumulator to the compression chamber includes: when the second pressure P0 is greater than or equal to the first pressure P1, controlling the first reservoir to supply oil to the compression chamber at a first flow rate; when the second pressure P0 is less than the first pressure P1, controlling the first reservoir to supply oil to the compression chamber at a second flow rate, until the second pressure P0 is greater than or equal to the first pressure P1, controlling the first reservoir to supply oil to the compression chamber at a first flow rate; wherein, the first flow rate is greater than the second flow rate.

[0016] By applying the technical solution of this invention, a suspension system for adjusting vehicle height is provided. The suspension system includes a main accumulator and an actuator. The main accumulator has a first reservoir for storing oil. The actuator includes an adjusting device, which comprises an adjusting section and a mounting cavity. At least a portion of the adjusting section is movably disposed within the mounting cavity, and the adjusting end of the adjusting section extends from the mounting cavity and connects to the vehicle body. The mounting cavity includes a compression cavity and a settling cavity. The adjusting section is disposed within the settling cavity, and the compression cavity is located below the settling cavity, communicating with the first reservoir. Oil is injected into the compression cavity through the first reservoir, causing the adjusting section to move upward under the pressure of the oil. This, in turn, drives the vehicle body to perform a lifting motion, thereby solving the problem of low steady-state vehicle height adjustment and maintenance capabilities in existing suspension systems. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the hydraulic principle of an embodiment of a vehicle according to the present invention is shown;

[0019] Figure 2 It shows according to Figure 1 A magnified view of a portion at point A;

[0020] Figure 3 A schematic diagram of the overall structure of an embodiment of the suspension system according to the present invention is shown; and

[0021] Figure 4 A schematic flowchart of an adjustment method according to the present invention is shown.

[0022] The above figures include the following reference numerals:

[0023] 1. Main accumulator; 11. First reservoir chamber; 2. Adjustment device; 21. Adjustment section; 211. Adjustment rod; 212. Piston; 22. Mounting chamber; 221. Compression chamber; 222. Restoration chamber; 3. Angle accumulator; 31. Second reservoir chamber; 4. First pressure detection component; 5. Main connecting pipe; 6. Drive pump; 7. Throttle valve; 8. Second pressure detection component; 9. Safety component; 91. First check valve; 92. Second check valve; 10. Vehicle height sensor; 20. Control module. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Please refer to Figures 1 to 4 The first aspect of the present invention provides a suspension system for adjusting the height of a vehicle body. The suspension system includes a main accumulator 1 and an actuator. In order to supply oil to the actuator, the main accumulator 1 has a first reservoir 11 for storing oil. In order to adjust and maintain the height of the vehicle body, the actuator includes an adjustment device 2. The adjustment device 2 includes an adjustment part 21 and a mounting cavity 22. At least a portion of the adjustment part 21 is movably disposed in the mounting cavity 22. The adjustment end of the adjustment part 21 extends out of the mounting cavity 22 and is connected to the vehicle body to drive the vehicle body to rise and fall through the adjustment part 21.

[0026] The mounting cavity 22 includes a compression cavity 221 and a recovery cavity 222, with the adjustment part 21 disposed in the recovery cavity 222. The compression cavity 221 is located below the recovery cavity 222 and is connected to the first liquid storage cavity 11. Oil is injected into the compression cavity 221 through the first liquid storage cavity 11 so that the adjustment part 21 moves upward under the action of oil pressure, thereby driving the vehicle body to perform lifting motion.

[0027] This invention provides a suspension system, which includes a main accumulator 1 and an actuator. Oil is injected into a compression chamber 221 through a first reservoir 11 of the main accumulator 1, causing an adjusting unit 21 to move upward under the pressure of the oil. This, in turn, causes the vehicle body to lift. The speed at which the adjusting unit 21 moves the vehicle body upward is adjusted by regulating the rate at which the oil is injected into the compression chamber 221 from the first reservoir 11.

[0028] In the embodiments of this application, steady-state adjustment of vehicle height is achieved by injecting or extracting oil into the mounting cavity 22, thereby driving the adjustment part 21 to move within the mounting cavity 22. Since oil is used as the driving force for the movement of the adjustment part 21, the oil is not easily compressed. When the vehicle is bumpy, the oil can provide stable pressure for the adjustment part 21, which improves the suspension system's ability to maintain vehicle height and thus solves the problem of low steady-state adjustment and maintenance capabilities of the suspension system in the prior art.

[0029] In addition, to facilitate lowering the height of the vehicle body, the actuator also includes an angle accumulator 3. The angle accumulator 3 has a second liquid storage chamber 31, which is connected to the recovery chamber 222. Oil is injected into the recovery chamber 222 through the second liquid storage chamber 31, so that the adjustment part 21 moves downward under the action of oil pressure, thereby driving the vehicle body to descend.

[0030] Specifically, the angle accumulator 3 includes an air chamber and a second liquid storage chamber 31. When oil is injected into the second liquid storage chamber 31, the gas in the air chamber is compressed.

[0031] Specifically, the buffering effect of the angle accumulator 3 provided in this application is mainly manifested in the following two aspects:

[0032] Firstly, during the height adjustment process, a buffering effect is activated. When the vehicle body is lifted or lowered by the adjustment unit 21, the oil in the recovery chamber 222 and the second liquid storage chamber 31 is circulated, thereby compressing the air in the air chamber. This reduces the impact of the oil in the compression chamber on the adjustment unit, and makes the vehicle body rise or fall more smoothly without any jamming, sudden stop or sudden drop, thus avoiding accidents during the height adjustment process.

[0033] Secondly: After adjusting the vehicle height and locking the height of the vehicle body at this time, when the vehicle is in operation, the oil in the restoration chamber 222 and the second liquid storage chamber 31 circulates, thereby compressing the air in the air chamber, which reduces the impact of the oil in the compression chamber on the adjustment part and buffers the impact on the road surface, preventing bumps during vehicle operation.

[0034] When the vehicle height needs to be increased, the oil in the first reservoir 11 flows into the compression chamber 221, causing the adjusting part 21 to move upward under the action of oil pressure, thereby driving the vehicle body to lift. At the same time, as the adjusting part 21 rises, excess oil in the recovery chamber 222 is pumped into the second reservoir 31. When the vehicle height needs to be decreased, the oil in the second reservoir 31 flows into the recovery chamber 222, causing the adjusting part 21 to move downward under the action of oil pressure, thereby driving the vehicle body to descend. At the same time, as the adjusting part 21 descends, excess oil in the compression chamber 221 is transported into the first reservoir 11.

[0035] Furthermore, in order to detect the pressure in the second liquid storage chamber 31 of the angle accumulator 3, the actuator also includes a first pressure detection component 4. The first pressure detection component 4 is connected to the angle accumulator 3 and is used to detect the pressure in the second liquid storage chamber 31. Since the second liquid storage chamber 31 is connected to the recovery chamber 222, the first pressure detection component 4 measures the pressure in the recovery chamber 222. By judging the relationship between the pressure in the recovery chamber 222 and the pressure on the main accumulator 1 side, it is determined whether it is necessary to reduce the pressure in the recovery chamber 222.

[0036] Preferably, the first pressure detection component 4 is a first pressure sensor.

[0037] Specifically, in order to allow the oil in the first reservoir 11 to be smoothly injected into or extracted from the compression chamber 221, the actuator also includes a main connecting pipe 5. The two ends of the main connecting pipe 5 are connected to the first reservoir 11 and the compression chamber 221 respectively, so that the oil in the first reservoir 11 can flow to the compression chamber 221 through the main connecting pipe 5, and similarly, the oil in the compression chamber 221 can flow to the first reservoir 11 through the main connecting pipe 5.

[0038] Furthermore, in order to provide driving force, the actuator in this embodiment of the application also includes a drive pump 6, which is disposed on the main connecting pipe 5 and connected to the main connecting pipe 5. The drive pump 6 drives the oil in the first liquid storage chamber 11 to be injected into or extracted from the compression chamber 221.

[0039] Optionally, the drive pump 6 can be an electric pump, a pneumatic pump, or a hydraulic pump.

[0040] Preferably, the drive pump 6 is a bidirectional controllable electric hydraulic pump. The working principle of the bidirectional controllable electric hydraulic pump is as follows: when the motor starts, the motor drives the pump shaft to rotate, the pump body draws in the liquid and compresses it before discharging it. The inlet valve and outlet valve control the direction of operation and flow rate of the hydraulic pump according to the change of the control signal, thereby realizing bidirectional controllability of the electric hydraulic pump.

[0041] Specifically, when using a bidirectional controllable electric hydraulic pump, by controlling the pump's rotation direction and flow rate, the oil can be injected from the first reservoir 11 into the compression chamber 221 or the recovery chamber 222 under the action of the drive pump 6, and can also be drawn from the compression chamber 221 or the recovery chamber 222 into the first reservoir 11. The bidirectional controllable electric hydraulic pump has the advantages of simple structure, convenient operation, and high reliability.

[0042] Furthermore, in order to adjust the flow rate of oil injected from the first reservoir 11 into the compression chamber 221 or the recovery chamber 222, the actuator also includes a throttle valve 7. The throttle valve 7 is installed on the main connecting pipe 5. The flow rate in the main connecting pipe 5 is controlled by the throttle valve 7, thereby controlling the flow rate of oil injected from the first reservoir 11 into the compression chamber 221 or the recovery chamber 222.

[0043] Preferably, the throttle valve 7 is a proportional throttle valve, which is composed of a proportional electromagnet and a flow valve. Its working principle is as follows: the proportional electromagnet replaces the manual adjustment device of the throttle valve or speed control valve, and the opening degree of the throttle valve is changed by inputting an electrical signal, thereby regulating the flow of the system.

[0044] Specifically, when it is necessary to slowly inject oil into the compression chamber 221, the opening of the proportional throttle valve is first controlled to decrease, and then the bidirectional controllable electric hydraulic pump is controlled to inject the oil in the first reservoir 11 into the compression chamber 221; when it is necessary to quickly inject oil into the compression chamber 221, the opening of the proportional throttle valve is first controlled to increase, and then the bidirectional controllable electric hydraulic pump is controlled to inject the oil in the first reservoir 11 into the compression chamber 221.

[0045] Similarly, when it is necessary to slowly pump the oil in the compression chamber 221 into the first reservoir 11, first control the opening of the proportional throttle valve to decrease, and then control the bidirectional controllable electric hydraulic pump to pump the oil in the compression chamber 221 into the first reservoir 11; when it is necessary to quickly pump the oil in the compression chamber 221 into the first reservoir 11, first control the opening of the proportional throttle valve to increase, and then control the bidirectional controllable electric hydraulic pump to pump the oil in the compression chamber 221 into the first reservoir 11.

[0046] Furthermore, in order to detect the pressure in the first reservoir 11 of the main accumulator 1, the suspension system in this embodiment also includes a second pressure detection component 8. The second pressure detection component 8 is connected to the main accumulator 1 and is used to detect the pressure in the first reservoir 11. Since the first pressure detection component 4 detects the pressure on the side of the corner accumulator 3, and the second reservoir 31 of the corner accumulator 3 is connected to the recovery chamber 222, by judging the relationship between the pressure on the side of the corner accumulator 3 and the pressure on the side of the main accumulator 1, it is determined whether it is necessary to reduce the pressure on the side of the corner accumulator 3, and then it is determined whether it is necessary to reduce the pressure in the recovery chamber 222.

[0047] Preferably, the second pressure detection component 8 is a second pressure sensor.

[0048] Specifically, the pressure detected by the second pressure detection component 8 on the main accumulator 1 side is the second pressure P0, and the pressure detected by the first pressure detection component 4 on the angle accumulator 3 side is the first pressure P1. When the second pressure P0 is greater than or equal to the first pressure P1, there is no need to reduce the pressure in the recovery chamber 222, and oil can be directly injected into the compression chamber 221 or the recovery chamber 222. When the second pressure P0 is less than the first pressure P1, it is necessary to reduce the pressure in the recovery chamber 222. First, the drive pump 6 is started to slowly inject oil into the compression chamber 221 or the recovery chamber 222 to reduce the pressure on the angle accumulator 3 side until the second pressure P0 is greater than or equal to the first pressure P1.

[0049] By setting up a first pressure detection component 4 and a second pressure detection component 8, the pressure in the recovery chamber 222 can be monitored and adjusted in a timely manner, preventing excessive pressure in the recovery chamber 222 from damaging the adjustment device, thereby avoiding accidents and extending the service life of the suspension system.

[0050] like Figure 1 and Figure 3 As shown, the adjustment part 21 in this embodiment includes an adjustment rod 211 and a piston 212. One end of the adjustment rod 211 extends out of the restoration cavity 222 and is connected to the vehicle body; the end of the adjustment rod 211 away from the vehicle body is connected to the piston 212. The piston 212 drives the adjustment rod 211 to move, thereby driving the vehicle body to rise and fall.

[0051] Specifically, an opening is provided on the top of the side of the mounting cavity 22 near the restoration cavity 222. The end of the adjusting rod 211 away from the piston 212 passes through the opening and is connected to the vehicle body. The adjusting rod 211 is movably set at the opening. A sealing component is provided between the adjusting rod 211 and the opening to prevent the oil in the restoration cavity 222 from overflowing through the opening.

[0052] Preferably, the sealing component is an annular sealing gasket made of rubber, which is disposed on the passage opening, and the adjusting rod 211 is movably inserted inside the annular sealing gasket.

[0053] In addition, to provide secondary protection for the regulating device 2, the actuator also includes a safety component 9. The safety component 9 includes a first one-way valve 91 and a second one-way valve 92. The piston 212 is provided with a first channel and a second channel. The two ends of the first channel are connected to the compression chamber 221 and the recovery chamber 222, and the two ends of the second channel are also connected to the compression chamber 221 and the recovery chamber 222. The first one-way valve 91 is provided in the first channel, which allows the oil in the recovery chamber 222 to flow only into the compression chamber 221. And / or, the second one-way valve 92 is provided in the second channel, which allows the oil in the compression chamber 221 to flow only into the recovery chamber 222.

[0054] Specifically, when the pressure in the recovery chamber 222 is overloaded, in order to protect the regulating device 2 from damage, the first one-way valve 91 is opened, allowing the oil in the recovery chamber 222 to flow into the compression chamber 221, thereby reducing the pressure in the recovery chamber 222; when the pressure in the compression chamber 221 is overloaded, in order to protect the regulating device 2 from damage, the second one-way valve 92 is opened, allowing the oil in the compression chamber 221 to flow into the recovery chamber 222, thereby reducing the pressure in the compression chamber 221.

[0055] Furthermore, in order to maintain the vehicle height after the vehicle body is adjusted, there are multiple actuators. The multiple actuators are evenly spaced along the circumference of the vehicle body, so that the multiple actuators support different positions of the vehicle body. The first liquid storage chamber 11 of the main accumulator 1 is connected to the compression chamber 221 of the adjustment device 2 of each actuator, so that the oil in the first liquid storage chamber 11 can be transported to the compression chamber 221 of each actuator, thereby adjusting the height of different positions of the vehicle body and thus leveling the height of the vehicle body.

[0056] Generally, such as Figure 1 and Figure 3 As shown, since the vehicle has four wheels, the actuators can be set to four. The four actuators are arranged in sequence on the vehicle body near each wheel, which makes it easy to adjust the height of the front left, rear left, front right and / or rear right positions of the vehicle body, thereby leveling and maintaining the height of the vehicle body.

[0057] A second aspect of the present invention provides a vehicle including a vehicle body, a suspension system and a vehicle height sensor 10, wherein the suspension system and the vehicle height sensor 10 are respectively disposed on the vehicle body, and the suspension system includes a plurality of actuators.

[0058] Among them, the vehicle height sensor 10 is used to detect the height of the vehicle body (specifically, the height of the vehicle body refers to the vertical relative displacement between the vehicle body and the lower suspension arm of the suspension system or the lower support of the shock absorber). In order to detect the height of different positions of the vehicle body, there are multiple vehicle height sensors 10, and multiple vehicle height sensors 10 are connected to multiple actuators one by one; the suspension system is the suspension system described above.

[0059] The suspension system includes a second pressure detection component 8 and multiple first pressure detection components 4. The vehicle also includes a control module 20, which is communicatively connected to multiple vehicle height sensors 10, the second pressure detection component 8 and the multiple first pressure detection components 4, so that the data detected by the multiple vehicle height sensors 10, the second pressure detection component 8 and the multiple first pressure detection components 4 are all transmitted to the control module 20.

[0060] Specifically, after the vehicle height data detected by the vehicle height sensor 10 is sent to the control module 20, the control module 20 determines whether the vehicle height needs to be adjusted. If so, the control module 20 then determines whether the detection value of the first pressure P1 of the second pressure detection component 8 is greater than or equal to the detection value of the second pressure P0 of the first pressure detection component 4, thereby determining whether the pressure in the restoration chamber 222 needs to be adjusted, and then the vehicle height is adjusted by injecting or extracting oil.

[0061] Generally, there are four actuators and four vehicle height sensors 10, which are set at positions on the vehicle body near each wheel to detect the height of the vehicle body near each wheel.

[0062] Optionally, the vehicle height sensor 10 is a photoelectric sensor. The main body of the vehicle height sensor 10 is mounted on the vehicle body. The vertical movement of the suspension system is converted into the rotational movement of the disk slot through the control linkage. The vehicle height is detected by the change in the output of the photoelectric breaker and converted into an electrical signal and sent to the control module 20.

[0063] A third aspect of the present invention provides an adjustment method applicable to the aforementioned vehicle. The adjustment method includes: detecting the pressure on the main accumulator side as a second pressure P0; detecting the pressure on the corner accumulator side as a first pressure P1; comparing the second pressure P0 and the first pressure P1; and controlling the flow rate of oil supplied from the first reservoir chamber to the compression chamber based on the comparison result.

[0064] Furthermore, based on the comparison results, the method for controlling the flow rate of oil supplied from the main accumulator to the compression chamber includes: when the second pressure P0 is greater than or equal to the first pressure P1, controlling the first reservoir to supply oil to the compression chamber at a first flow rate; when the second pressure P0 is less than the first pressure P1, controlling the first reservoir to supply oil to the compression chamber at a second flow rate, until the second pressure P0 is greater than or equal to the first pressure P1, controlling the first reservoir to supply oil to the compression chamber at a first flow rate; wherein, the first flow rate is greater than the second flow rate.

[0065] Specifically, the adjustment method includes acquiring the height detection values ​​of each vehicle height sensor in the vehicle; comparing each height detection value with a preset height threshold; selecting the first vehicle height sensor whose height detection value is less than or greater than the preset height threshold; and controlling the first actuator corresponding to the first vehicle height sensor to adjust the height of the vehicle body.

[0066] When the height of the vehicle body is lower than a preset height threshold, the control module acquires the second pressure P0 detected by the second pressure detection component on the main accumulator side and the first pressure P1 detected by the first pressure detection component in the recovery chamber; the control module controls the flow rate of oil injected from the first reservoir chamber into the compression chamber according to the first pressure P1 and the second pressure P0.

[0067] When the height of the vehicle body is higher than the preset height threshold, the control module acquires the second pressure P0 on the main accumulator side detected by the second pressure detection component and the first pressure P1 in the recovery chamber detected by the first pressure detection component; the control module controls the flow rate of oil drawn from the compression chamber to the first storage chamber according to the first pressure P1 and the second pressure P0.

[0068] Specifically, the control module controls the rate at which the first reservoir injects oil into the compression chamber based on the first pressure P1 and the second pressure P0. This includes determining whether the first pressure P1 is greater than the second pressure P0. If not, the control module injects oil into the compression chamber at a first flow rate until the height of the vehicle body reaches a preset height threshold. If so, the control module injects oil into the compression chamber at a second flow rate until the first pressure P1 is less than or equal to the second pressure P0. The control module then injects oil into the compression chamber at a first flow rate until the height of the vehicle body reaches the preset height threshold.

[0069] Similarly, the control module controls the flow rate of oil drawn from the compression chamber to the first reservoir chamber based on the first pressure P1 and the second pressure P0, including: determining whether the first pressure P1 is greater than the second pressure P0; if not, controlling the oil to be drawn from the compression chamber to the first reservoir chamber at a first flow rate until the height of the vehicle body reaches a preset height; if so, controlling the oil to be drawn from the compression chamber to the first reservoir chamber at a second flow rate until the first pressure P1 is less than or equal to the second pressure P0, and controlling the oil to be drawn from the compression chamber to the first reservoir chamber at a first flow rate until the height of the vehicle body reaches a preset height.

[0070] In fact, the suspension system in this embodiment is equipped with a main accumulator 1 (when the vehicle has three passengers, the pressure of the main accumulator 1 and the corner accumulator 3 are equal, that is, the second pressure P0 is equal to the first pressure P1), four proportional throttle valves and five pressure sensors. The proportional throttle valves are connected to the main accumulator 1 and the actuator, which can realize the connection of the oil and the regulation of the connection flow. Each actuator's corner accumulator 3 is equipped with a first pressure detection component 4 (communicating with the controller of the drive pump 6) on the oil side, and a second pressure detection component 8 (communicating with the control module 20 of the suspension system) on the oil side of the main accumulator 1, which is used to detect the oil pressure in the system and feed it back to the control module 20.

[0071] When the vehicle body needs to be raised, the control module 20 first determines the relationship between the pressure on the main accumulator 1 side and the pressure on the corner accumulator 3 side. When the second pressure P0 is greater than or equal to the first pressure P1, the throttle valve 7 is opened first, and then the drive pump 6 is started to inject oil from the first reservoir 11 to the compression chamber 221 at the first flow rate to achieve vehicle body lifting. After the vehicle height sensor 10 monitors that the vehicle height has been adjusted to the preset height threshold (or when the first pressure detection component 4 of the corner accumulator 3 monitors that the target pressure has been reached, the pressure can be calibrated with the vehicle height), the throttle valve 7 is closed, and the vehicle height is maintained.

[0072] When the second pressure P0 is less than the first pressure P1, the drive pump 6 is first started to inject oil from the first reservoir 11 into the compression chamber 221 at the second flow rate, and the pressure on the side of the angle accumulator 3 is reduced. When the second pressure P0 is greater than or equal to the first pressure P1, the throttle valve is opened, and the drive pump 6 is started to inject oil from the first reservoir 11 into the compression chamber 221 at the first flow rate. At this time, the vehicle body is lifted. After the vehicle height sensor 10 monitors the vehicle height and adjusts it to the preset height threshold (or when the first pressure detection component 4 of the angle accumulator 3 monitors the target pressure, the pressure can be calibrated with the vehicle height), the throttle valve 7 is closed, and the vehicle height is maintained.

[0073] When the vehicle body needs to be lowered, the control module 20 first determines the relationship between the pressure on the main accumulator 1 side and the pressure on the angle accumulator 3 side. When the second pressure P0 is greater than or equal to the first pressure P1, the throttle valve 7 is opened first, and then the drive pump 6 is started to control the oil to be drawn from the compression chamber 221 into the first liquid storage chamber 11 at the first flow rate, so as to lower the vehicle body. After the vehicle height sensor 10 monitors the vehicle height and adjusts it to the preset height threshold (or when the first pressure detection component 4 of the angle accumulator 3 monitors the target pressure, the pressure can be calibrated with the vehicle height), the throttle valve 7 is closed, and the vehicle height is maintained.

[0074] When the second pressure P0 is less than the first pressure P1, the drive pump 6 is first started to control the oil to be drawn from the compression chamber 221 into the first reservoir 11 at the second flow rate, and the pressure on the side of the angle accumulator 3 is reduced. When the second pressure P0 is greater than or equal to the first pressure P1, the throttle valve is opened, the drive pump 6 is started to control the oil to be drawn from the compression chamber 221 into the first reservoir 11 at the first flow rate. At this time, the vehicle body descends. After the vehicle height sensor 10 monitors the vehicle height and adjusts it to the preset height threshold (or when the first pressure detection component 4 of the angle accumulator 3 monitors the target pressure, the pressure can be calibrated with the vehicle height), the throttle valve 7 is closed, and the vehicle height is maintained.

[0075] Specifically, the adjustable vehicle height force F = ΔP * (3.14 * D * D / 4), and the adjustable vehicle height H = ρ * F / K, where ΔP is the maximum recommended pressure difference between the second pressure P0 and the first pressure P1, D is the diameter of piston 212, ρ is the lever ratio, and K is the suspension stiffness. Based on ΔP = 26 bar, D = 40 mm, K = 45 N / mm, ρ = 0.68, the adjustable vehicle height H = 49 mm.

[0076] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0077] This invention provides a suspension system including a main accumulator 1 and an actuator. The main accumulator 1 has a first reservoir 11 for storing oil. The actuator includes an adjustment device 2, which comprises an adjustment section 21 and a mounting cavity 22. At least a portion of the adjustment section 21 is movably disposed within the mounting cavity 22, and the adjustment end of the adjustment section 21 extends out of the mounting cavity 22 and connects to the vehicle body. The mounting cavity 22 includes a compression cavity 221 and a recovery cavity 222. The adjustment section 21 is disposed within the recovery cavity 222, and the compression cavity 221 is located below the recovery cavity 222, communicating with the first reservoir 11. Oil is injected into the compression chamber 221 through the first reservoir 11 of the main accumulator 1, so that the regulating part 21 moves upward under the action of oil pressure, thereby driving the vehicle body to perform lifting motion through the regulating part 21. The speed at which the regulating part 21 drives the vehicle body to move upward is adjusted by adjusting the speed at which the oil is injected into the compression chamber 221 from the first reservoir 11.

[0078] In the embodiments of this application, steady-state adjustment of vehicle height is achieved by injecting or extracting oil into the mounting cavity 22, thereby driving the adjustment part 21 to move within the mounting cavity 22. Since oil is used as the driving force for the movement of the adjustment part 21, the oil is not easily compressed. When the vehicle is bumpy, the oil can provide stable pressure for the adjustment part 21, which improves the suspension system's ability to maintain vehicle height and thus solves the problem of low steady-state adjustment and maintenance capabilities of the suspension system in the prior art.

[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An adjustment method, the adjustment method being applicable to a vehicle, the vehicle including a body and a suspension system, the suspension system comprising: The main accumulator (1) has a first liquid storage chamber (11) for storing oil; the actuator includes an adjustment device (2), which includes an adjustment part (21) and a mounting cavity (22). At least a portion of the adjustment part (21) is movably disposed within the mounting cavity (22), and the adjustment end of the adjustment part (21) extends out of the mounting cavity (22) and is connected to the vehicle body to drive the vehicle body to rise and fall through the adjustment part (21); wherein the mounting cavity (22) includes a compression cavity (221) and a recovery cavity (222), and the adjustment part (21) is disposed within the recovery cavity (222); the compression cavity (221) includes a compression cavity (221) and a recovery cavity (222), and the adjustment part (21) is disposed within the recovery cavity (222); the compression cavity (221) includes a compression cavity (221) and a recovery cavity (222), and the compression cavity (221) includes a compression cavity (221) and a recovery cavity (222). The compression chamber (221) is located below the recovery chamber (222). The compression chamber (221) is connected to the first liquid storage chamber (11). Oil is injected into the compression chamber (221) through the first liquid storage chamber (11) to make the adjusting part (21) move upward under the action of oil pressure. The actuator further includes: an angle accumulator (3) having a second liquid storage chamber (31). The second liquid storage chamber (31) is connected to the recovery chamber (222). Oil is injected into the recovery chamber (222) through the second liquid storage chamber (31) to make the adjusting part (21) move downward under the action of oil pressure. The adjusting method includes: The pressure detected on the main accumulator side is the second pressure P0; The pressure on the angle accumulator side is the first pressure P1; Compare the second pressure P0 with the first pressure P1; Based on the comparison results, the flow rate of oil supplied from the first liquid storage chamber to the compression chamber is controlled; The method for controlling the flow rate of oil supplied from the main accumulator to the compression chamber based on the comparison results includes: When the second pressure P0 is greater than or equal to the first pressure P1, the first liquid storage chamber is controlled to supply oil to the compression chamber at a first flow rate. When the second pressure P0 is less than the first pressure P1, the first liquid storage chamber is controlled to supply oil to the compression chamber at a second flow rate until the second pressure P0 is greater than or equal to the first pressure P1, and then the first liquid storage chamber is controlled to supply oil to the compression chamber at the first flow rate. Wherein, the first flow rate is greater than the second flow rate.

2. The adjustment method according to claim 1, characterized in that, The actuator also includes: The first pressure detection component (4) is connected to the angle accumulator (3) and is used to detect the pressure on the side of the angle accumulator (3).

3. The adjustment method according to claim 1, characterized in that, The actuator also includes: The main connecting pipe (5) is connected at both ends to the first liquid storage chamber (11) and the compression chamber (221), respectively. A drive pump (6) is installed on the main connecting pipe (5) and connected to the main connecting pipe (5).

4. The adjustment method according to claim 3, characterized in that, The actuator also includes: A throttle valve (7) is installed on the main connecting pipe (5) to control the flow rate of oil in the main connecting pipe (5).

5. The adjustment method according to claim 1, characterized in that, The suspension system also includes: The second pressure detection component (8) is connected to the main accumulator (1) and is used to detect the pressure in the first liquid storage chamber (11).

6. The adjustment method according to claim 1, characterized in that, The adjustment unit (21) includes: An adjusting rod (211) is provided, one end of which extends out of the restoration cavity (222) and is connected to the vehicle body. The piston (212) is connected to the piston (212) at one end of the adjusting rod (211) away from the vehicle body. The adjusting rod (211) is moved by the piston (212) to drive the vehicle body to rise and fall. The piston (212) is provided with a first channel and a second channel. A first check valve (91) is provided in the first channel to allow the oil in the recovery chamber (222) to flow into the compression chamber (221); and / or A second one-way valve (92) is provided in the second channel to allow the oil in the compression chamber (221) to flow into the recovery chamber (222).

7. The adjustment method according to any one of claims 1 to 6, characterized in that, The actuators are multiple and are evenly spaced along the circumference of the vehicle body. The first liquid storage chamber (11) of the main accumulator (1) is connected to the compression chamber (221) of the adjustment device (2) of each actuator.

8. A vehicle, comprising a vehicle body, a suspension system, and a vehicle height sensor (10), wherein the suspension system and the vehicle height sensor (10) are respectively disposed on the vehicle body, and the suspension system comprises a plurality of actuators, characterized in that, There are multiple vehicle height sensors (10), and each of the multiple vehicle height sensors (10) is connected to a corresponding actuator; Wherein, the suspension system is the suspension system in the adjustment method of any one of claims 1-7; The vehicle also includes a control module (20), which is communicatively connected to multiple vehicle height sensors (10) so that the data detected by the multiple vehicle height sensors (10) are transmitted to the control module (20).

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