Hydraulic active suspension system, oil way control method, vehicle and storage medium

Abstract

The invention provides a hydraulic active suspension system, an oil way control method, a vehicle and a storage medium, the system comprises a one-way hydraulic pump, a reversing component and a shock absorber, and the shock absorber comprises a shock absorption cavity and a shock absorption piston movably arranged in the shock absorption cavity; the vibration reduction cavity is divided into a recovery cavity and a compression cavity of which the volumes can be relatively changed through the vibration reduction piston; two ports of the first oil way are respectively communicated with the outlet end of the one-way hydraulic pump and the reversing component; two ports of the second oil way are respectively communicated with the reversing component and the recovery cavity; two ports of the third oil way are respectively communicated with the compression cavity and the reversing component; and two ports of the fourth oil way are respectively communicated with the reversing component and the inlet end of the one-way hydraulic pump. The technical problems that in the prior art, due to the fact that a hydraulic active suspension is provided with a plurality of hydraulic pumps needing to rotate forwards and backwards, noise is generated, energy consumption is increased, and the service life of the hydraulic pumps is shortened are solved.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more specifically, to a hydraulic active suspension system, an oil circuit control method, a vehicle, and a storage medium. Background Technology

[0002] Existing hydraulic active suspension systems require a hydraulic pump to control each wheel. This control method not only demands more engine compartment space for range-extended, hybrid, or gasoline vehicles, but also increases the vehicle's weight and energy consumption due to the multiple hydraulic pumps. Furthermore, the bidirectional adjustment design of existing hydraulic pumps, which requires real-time forward and reverse switching to adapt to different directions of motion, not only increases the system's response time and reduces control accuracy, but also exacerbates mechanical wear and reduces equipment lifespan.

[0003] There is currently no good solution to the above problems. Summary of the Invention

[0004] This application provides a hydraulic active suspension system, an oil circuit control method, a vehicle, and a storage medium to at least solve the technical problems of increased noise, energy consumption, and shortened hydraulic pump life caused by the configuration of multiple hydraulic pumps that need to rotate in both directions in the prior art.

[0005] According to one aspect of the embodiments of this application, a hydraulic active suspension system is provided, suitable for automobiles, the hydraulic active suspension system comprising:

[0006] A one-way hydraulic pump, a reversing component, and a vibration damper. The vibration damper includes a vibration damping chamber and a vibration damping piston movably disposed in the vibration damping chamber, so as to divide the vibration damping chamber into a recovery chamber and a compression chamber with relatively variable volumes through the vibration damping piston.

[0007] The first oil circuit has its two ends connected to the outlet of the unidirectional hydraulic pump and the reversing component, respectively.

[0008] The second oil circuit has two ports connected to the reversing component and the recovery chamber, respectively.

[0009] The third oil passage has two ports connected to the compression chamber and the reversing component, respectively.

[0010] The fourth oil circuit has two ports connected to the inlet of the reversing component and the unidirectional hydraulic pump, respectively.

[0011] The reversing components are located in the first and third oil circuits. The shock absorber has a recovery state and a compression state. When the shock absorber is in the compression state, the first oil circuit is connected to the second oil circuit under the action of the reversing components, and the fourth oil circuit is connected to the third oil circuit under the action of the reversing components. When the shock absorber is in the recovery state, the first oil circuit is connected to the third oil circuit under the action of the reversing components, and the second oil circuit is connected to the fourth oil circuit under the action of the reversing components. This allows the shock absorber piston to reciprocate within the shock absorber chamber by supplying hydraulic oil to the compression chamber and the recovery chamber respectively.

[0012] Furthermore, the system also includes a fifth oil passage, the two ports of which are connected to the recovery chamber and the compression chamber, respectively;

[0013] The reset switch is located in the fifth oil circuit to adjust the flow rate of hydraulic oil entering the compression chamber from the reset chamber.

[0014] The controller is connected to both the recovery switch and the one-way hydraulic pump. When the shock absorber is in the recovery state, the controller controls the flow rate of hydraulic oil entering the compression chamber by controlling the opening degree of the recovery switch according to the working state of the one-way hydraulic pump.

[0015] Furthermore, the system also includes a sixth oil passage, the two ports of which are connected to the recovery chamber and the compression chamber, respectively;

[0016] A compression switching component is installed in the sixth oil circuit to adjust the flow rate of hydraulic oil entering the recovery chamber from the compression chamber;

[0017] The controller is connected to both the compression switch and the one-way hydraulic pump. When the shock absorber is in a compressed state, the controller controls the flow rate of hydraulic oil entering the recovery chamber by controlling the opening of the compression switch according to the working state of the one-way hydraulic pump.

[0018] Furthermore, the system also includes a first throttling component, disposed in the second oil circuit, to control the flow rate of hydraulic oil delivered from the one-way hydraulic pump to the recovery chamber when the shock absorber is in the recovery state; and / or,

[0019] A second throttling component, located in the third oil circuit, controls the flow rate of hydraulic oil delivered from the one-way hydraulic pump to the compression chamber when the shock absorber is in compression; and / or,

[0020] The reversing component has a first valve port, a second valve port, a third valve port, and a fourth valve port. The first valve port is connected to the second valve port, and the third valve port is connected to the fourth valve port. When the shock absorber is in the compression state, the first valve port is connected to the first oil circuit, the second valve port is connected to the second oil circuit, the third valve port is connected to the third oil circuit, and the fourth valve port is connected to the fourth oil circuit. At this time, the reversing component is in the first working position. When the shock absorber is in the recovery state, the first valve port is connected to the third valve port, and the second valve port is connected to the fourth valve port. At this time, the reversing component is in the second working position.

[0021] According to another aspect of the embodiments of this application, a hydraulic circuit control method is also provided, which is applicable to the above-mentioned hydraulic active suspension system. The hydraulic circuit control method includes: acquiring the working state of a one-way hydraulic pump during vehicle operation.

[0022] When the unidirectional hydraulic pump is in operation, it acquires the motion state of the shock absorber to control the reversing component to switch between the first and second positions according to the motion state, so as to deliver hydraulic oil to the recovery chamber or compression chamber under different motion states.

[0023] When the unidirectional hydraulic pump is not in operation, the motion state of the shock absorber is acquired, and the hydraulic oil is controlled to flow from the recovery chamber to the compression chamber, or from the compression chamber to the recovery chamber, according to the motion state of the shock absorber.

[0024] The motion state of the shock absorber includes compression state and recovery state.

[0025] Furthermore, the reversing component has a first valve port, a second valve port, a third valve port, and a fourth valve port. The step of acquiring the motion state of the shock absorber and controlling the reversing component to switch between the first and second positions according to the motion state includes:

[0026] When the one-way hydraulic pump is in operation, the road excitation frequency experienced by the vehicle's suspension system is obtained.

[0027] Determine the frequency band region corresponding to the road surface excitation frequency, and determine the rotational speed of the unidirectional hydraulic pump based on the frequency band region, and mark it as the target rotational speed;

[0028] Obtain the motion state of the shock absorber;

[0029] The reversing position of the reversing component and the opening degree of the compression switching component and the restoration switching component corresponding to the reversing position are determined based on the target speed and motion state.

[0030] While controlling the unidirectional hydraulic pump to rotate at the target speed, the hydraulic oil is controlled to be delivered to the compression chamber or the recovery chamber according to the reversing position;

[0031] The reversing station includes a first station and a second station. In the first station, the first valve port is connected to the second valve port, the third valve port is connected to the fourth valve port, the first valve port is connected to the first oil circuit, the second valve port is connected to the second oil circuit, the third valve port is connected to the third oil circuit, and the fourth valve port is connected to the fourth oil circuit. In the second station, the first valve port is connected to the third valve port, and the second valve port is connected to the fourth valve port.

[0032] Further, the step of determining the frequency band region corresponding to the road excitation frequency, determining the rotational speed of the unidirectional hydraulic pump based on the frequency band region, and marking it as the target rotational speed includes traversing the frequency-rotational speed correspondence table to determine the target frequency region corresponding to the road excitation frequency.

[0033] Based on the target frequency region, determine the preset rotational speed corresponding to the target frequency region and mark it as the target rotational speed. The frequency-rotational speed correspondence table includes multiple target frequency regions and the preset rotational speed corresponding to each target frequency region.

[0034] Furthermore, the steps for determining the reversing position of the reversing component based on the target rotational speed and motion state include:

[0035] When the target speed is within the first speed range and the motion state is compression, the first reversing station is activated, and a current within the first range is supplied to the compression switching component and the recovery switching component to control the opening degree of the compression switching component and the recovery switching component; and / or,

[0036] When the target speed is within the first speed range and the motion state is in the recovery state, the reversing station becomes the second station, and a current within the first range is supplied to the compression switching component and the recovery switching component to control the opening degree of the compression switching component and the recovery switching component; and / or,

[0037] When the target speed is within the second speed range and the motion state is compression, the first station of the reversing station supplies current within the second range to the compression switching component and the recovery switching component to control the opening degree of the compression switching component and the recovery switching component; and / or,

[0038] When the target speed is within the second speed range and the motion state is in the recovery state, the second station of the reversing station is activated, and current within the third range is supplied to the compression switching component and the recovery switching component to control the opening degree of the compression switching component and the recovery switching component.

[0039] When the target speed is within the third speed range and the motion state is compression, the first station of the reversing station supplies current within the third range to the compression switching component and the recovery switching component to control the opening degree of the compression switching component and the recovery switching component; and / or,

[0040] When the target speed is within the third speed range and the motion state is in the recovery state, the second station of the reversing station is activated, and current within the third range is supplied to the compression switching component and the recovery switching component to control the opening degree of the compression switching component and the recovery switching component.

[0041] According to another aspect of the embodiments of this application, a vehicle is also provided, including: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods in various embodiments of this application when it runs.

[0042] According to another aspect of the embodiments of this application, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is running, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of this application.

[0043] According to another aspect of the embodiments of this application, a computer program product is also provided, including a computer program that, when executed by a processor, implements the methods of various embodiments of this application.

[0044] According to another aspect of the embodiments of this application, a computer program product is also provided, including a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, implements the methods in various embodiments of this application.

[0045] According to another aspect of the embodiments of this application, a computer program is also provided, which, when executed by a processor, implements the methods of the various embodiments of this application.

[0046] In this embodiment, a combination of a unidirectional hydraulic pump and a reversing component is used. By controlling the flow direction of the oil between the first and fourth oil circuits, the purpose of adjusting the oil delivery and recovery according to the motion state of the shock absorber is achieved. This enables the system to respond efficiently under different road excitation frequencies and provide appropriate damping force and active force, thereby solving the technical problems of high energy consumption, increased cost and limited space layout caused by multi-pump configuration in the prior art.

[0047] Specifically, the hydraulic active suspension system of this application ensures the high efficiency and flexibility of oil circulation within the damping chamber by utilizing the continuous oil supply capability of the unidirectional hydraulic pump and the oil circuit switching function of the reversing component under different states. When the damper is in the compression state, the system can quickly establish an oil flow channel between the compression chamber and the unidirectional hydraulic pump. Simultaneously, the recovery chamber is connected to the external oil circuit through the reversing component, enabling rapid oil recovery. Conversely, when the damper is in the recovery state, the system can instantly adjust the oil flow direction to ensure that the recovery chamber is filled with oil, while the oil in the compression chamber can be smoothly discharged. This process not only optimizes the dynamic distribution of oil but also effectively reduces pump energy consumption and lowers the overall noise level of the system. Attached Figure Description

[0048] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0049] Figure 1 This is a schematic diagram of an oil circuit control method based on existing technology;

[0050] Figure 2 This is a schematic diagram of a hydraulic active suspension system according to an embodiment of this application.

[0051] 1. One-way hydraulic pump; 2. Reversing component; 21. First valve port; 22. Second valve port; 23. Third valve port; 24. Fourth valve port; 3. Vibration damper; 31. Vibration damping chamber; 311. Restoration chamber; 312. Compression chamber; 32. Vibration damping piston; 4. Restoration switching component; 5. Compression switching component; 6. First throttling component; 7. Second throttling component. Detailed Implementation

[0052] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0053] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0054] According to an embodiment of this application, an embodiment of an oil circuit control method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0055] like Figure 1 As shown, this embodiment first provides a hydraulic active suspension system suitable for automobiles. The hydraulic active suspension system includes:

[0056] One-way hydraulic pump 1, reversing component 2, shock absorber 3, the shock absorber 3 includes a shock absorption chamber 31 and a shock absorption piston 32 movably disposed in the shock absorption chamber 31, so as to divide the shock absorption chamber 31 into a recovery chamber 311 and a compression chamber 312 whose volumes can be relatively varied through the shock absorption piston 32;

[0057] The first oil circuit has its two ends connected to the outlet end of the unidirectional hydraulic pump 1 and the reversing component 2, respectively.

[0058] The second oil circuit has two ports connected to the reversing component 2 and the restoration chamber 311, respectively.

[0059] The third oil passage has two ports connected to the compression chamber 312 and the reversing component 2, respectively.

[0060] The fourth oil circuit has its two ends connected to the inlet of the reversing component 2 and the one-way hydraulic pump 1, respectively;

[0061] The reversing component 2 is installed on the first oil circuit and the third oil circuit. The shock absorber 3 has a recovery state and a compression state. When the shock absorber 3 is in the compression state, the first oil circuit is connected to the second oil circuit under the action of the reversing component 2, and the fourth oil circuit is connected to the third oil circuit under the action of the reversing component 2. When the shock absorber 3 is in the recovery state, the first oil circuit is connected to the third oil circuit under the action of the reversing component 2, and the second oil circuit is connected to the fourth oil circuit under the action of the reversing component 2. By delivering hydraulic oil to the compression chamber 312 and the recovery chamber 311 respectively, the shock absorber piston 32 is controlled to reciprocate in the shock absorber chamber 31.

[0062] Thus, in this application, the unidirectional hydraulic pump 1 rotates in one direction, eliminating the drawback of traditional hydraulic pumps that require frequent forward and reverse rotation. The unidirectional hydraulic pump 1 not only simplifies the internal structure of the pump and reduces mechanical wear, but also reduces noise levels and improves working efficiency and lifespan by avoiding forward and reverse rotation switching.

[0063] When the shock absorber 3 is in the compressed state, the reversing component 2 connects the first oil circuit with the second oil circuit, and simultaneously connects the fourth oil circuit with the third oil circuit. Hydraulic oil flows from the one-way hydraulic pump 1 to the compression chamber 312 of the shock absorber, and flows back from the recovery chamber 311 of the shock absorber 3 to the one-way hydraulic pump 1, forming a cycle. Conversely, when the shock absorber 3 is in the recovery state, the flow direction of the oil circuit is reversed. Hydraulic oil flows from the one-way hydraulic pump 1 to the recovery chamber 311, and flows back from the compression chamber 312 to the one-way hydraulic pump 1. In this way, through the control of the reversing component 2, the switching of hydraulic oil between the first, second, third, and fourth oil circuits is realized, ensuring that the one-way hydraulic pump 1 can effectively provide control in any suspension movement state without the need for forward and reverse switching.

[0064] Therefore, the first, second, third and fourth oil circuits of this application work in conjunction with the one-way hydraulic pump 1 under various working conditions, avoiding the additional energy consumption and noise caused by the forward and reverse rotation control of the one-way hydraulic pump 1.

[0065] Furthermore, the system also includes a fifth oil passage, the two ports of which are connected to the restoration chamber 311 and the compression chamber 312, respectively;

[0066] The reset switch component 4 is installed in the fifth oil circuit to adjust the flow rate of hydraulic oil entering the compression chamber 312 from the reset chamber 311;

[0067] The controller is connected to both the recovery switch component 4 and the one-way hydraulic pump 1, so that when the shock absorber 3 is in the recovery state, the flow rate of hydraulic oil entering the compression chamber 312 is controlled by controlling the opening degree of the recovery switch component 4 according to the working state of the one-way hydraulic pump 1.

[0068] The design of the fifth oil circuit and the reset switch component 4 enhances the flexibility of damping adjustment. Especially when the one-way hydraulic pump 1 is working in different states (high speed, medium speed, low speed or stopped), the controller can adjust the opening of the reset switch component 4 in real time according to the real-time monitored road excitation frequency and vehicle posture, thereby accurately controlling the hydraulic oil flow. This ensures that the suspension system can respond quickly and provide appropriate damping force and active force in fully active mode, and maintain good handling performance and comfort in semi-active mode. Even if the one-way hydraulic pump 1 fails, the system can still achieve fine adjustment of damping force through the independent control of the reset switch component 4, enhancing the system's redundancy design and reliability.

[0069] Optionally, the restoration switch component 4 can be either the restoration compression switch component 5 or the restoration switch component 4.

[0070] Furthermore, the system also includes a sixth oil passage, the two ports of which are connected to the restoration chamber 311 and the compression chamber 312, respectively;

[0071] The compression switch component 5 is installed in the sixth oil circuit to adjust the flow rate of hydraulic oil entering the recovery chamber 311 from the compression chamber 312;

[0072] The controller is connected to both the compression switch component 5 and the one-way hydraulic pump 1, so that when the shock absorber 3 is in the compressed state, the flow rate of hydraulic oil entering the recovery chamber 311 is controlled by controlling the opening degree of the compression switch component 5 according to the working state of the one-way hydraulic pump 1.

[0073] When the shock absorber 3 is in the compressed state, the compression switching component 5 dynamically adjusts its opening under the control of the controller to effectively control the hydraulic oil flow. Working in conjunction with the unidirectional hydraulic pump 1, it ensures that the system can respond quickly and precisely regulate oil pressure, providing appropriate damping force and driving force, whether under harsh road conditions with low-frequency, large-amplitude vibrations or under subtle fluctuations with high-frequency, small-amplitude vibrations. This effectively avoids the energy waste, increased noise, and mechanical wear caused by the forced forward and reverse rotation of traditional hydraulic pumps under different operating conditions, greatly improving the efficiency and lifespan of the unidirectional hydraulic pump 1, while simultaneously achieving refined management of the hydraulic oil flow.

[0074] The above technical solution enables the system to flexibly switch between fully active and semi-active modes. Even in the event of a failure of the one-way hydraulic pump 1, the basic suspension function can still be maintained through independent control of the compression switch component 5 or the reset switch component 4. This design not only significantly improves the vehicle's driving stability and ride comfort but also greatly enhances the system's reliability and ability to cope with unexpected situations.

[0075] Furthermore, the system also includes a first throttling component 6, which is disposed in the second oil circuit to control the flow rate of hydraulic oil delivered from the one-way hydraulic pump 1 to the recovery chamber 311 when the shock absorber 3 is in the recovery state.

[0076] The first throttling component 6 is located in the second oil circuit to control the flow rate of hydraulic oil delivered from the one-way hydraulic pump 1 to the recovery chamber 311 when the shock absorber 3 is in the recovery state. This allows the system to flexibly adjust the opening of the first throttling component 6 to fine-tune the hydraulic oil flow rate under high-frequency, low-amplitude excitation conditions, ensuring precise adjustment of the damping force. Even when the one-way hydraulic pump 1 is running at low speed or has stopped working, the stability of the suspension can be maintained through the combination of the compression on / off component 5 or the recovery on / off component 4 and the first throttling component 6.

[0077] Meanwhile, the coordinated operation of the first throttling component 6 and the controller enables real-time adjustment of the hydraulic oil flow, ensuring decoupling of the oil circuit control. This means that even when the operating state of a component (such as the one-way hydraulic pump 1) changes, the system can still maintain normal operation of the suspension system through independent adjustments of other controls (such as the compression switch component 5 or the reset switch component 4 and the first throttling component 6), thus improving overall reliability. This not only reduces excessive reliance on a single one-way hydraulic pump 1 but also optimizes the distribution and circulation of hydraulic oil, reducing energy consumption, minimizing mechanical wear, and extending the equipment's service life.

[0078] Furthermore, the system also includes a second throttling component 7, which is disposed in the third oil circuit to control the flow rate of hydraulic oil delivered from the one-way hydraulic pump 1 to the compression chamber 312 when the shock absorber 3 is in a compressed state.

[0079] This configuration allows the system to control the flow rate of hydraulic oil from the one-way hydraulic pump 1 to the recovery chamber 311 when the shock absorber 3 is in the recovery state, ensuring the accuracy of hydraulic oil delivery. The position of the second throttling component 7 on the third oil circuit also allows the flow rate of hydraulic oil input to the compression chamber 312 to be controlled when the shock absorber 3 is in the compression state.

[0080] Through the above technical solution, the system of this application can adjust the opening of the first throttling component 6 and the second throttling component 7 according to the working state of the unidirectional hydraulic pump 1 and the real-time needs of the vehicle, thereby controlling the hydraulic oil flow. This not only avoids the layout problems and high costs caused by the multiple hydraulic pump configuration in the prior art and reduces the dependence on the bidirectional regulating pump, but also significantly reduces system energy consumption and extends equipment life. At the same time, it ensures that even if the unidirectional hydraulic pump 1 malfunctions or stops, the system can still maintain basic suspension function through the independent control of the compression switch component 5 or the reset switch component 4 and the first throttling component 6 or the second throttling component 7, thus enhancing the stability of the system.

[0081] Furthermore, the reversing component 2 has a first valve port 21, a second valve port 22, a third valve port 23, and a fourth valve port 24. The first valve port 21 is connected to the second valve port 22, and the third valve port 23 is connected to the fourth valve port 24. When the damper 3 is in the compressed state, the first valve port 21 is connected to the first oil circuit, the second valve port 22 is connected to the second oil circuit, the third valve port 23 is connected to the third oil circuit, and the fourth valve port 24 is connected to the fourth oil circuit. At this time, the reversing component 2 is in the first working position. When the damper 3 is in the restoring state, the first valve port 21 is connected to the third valve port 23, and the second valve port 22 is connected to the fourth valve port 24. At this time, the reversing component 2 is in the second working position.

[0082] When the shock absorber 3 is in the compression state, the reversing component 2 automatically switches to the first position. At this time, the first valve port 21 and the third valve port 23 are connected to the first oil circuit and the third oil circuit, respectively, guiding the hydraulic oil from the one-way hydraulic pump 1 directly to the compression chamber 312. At the same time, the second valve port 22 and the fourth valve port 24 connect the second oil circuit and the fourth oil circuit, ensuring smooth circulation of the hydraulic oil within the system and providing sufficient power for the compression movement of the shock absorber 3. Conversely, when the shock absorber 3 enters the recovery state, the reversing component 2 adjusts to the second position. The first valve port 21 and the second valve port 22, as well as the third valve port 23 and the fourth valve port 24, form a new oil circuit channel, guiding the hydraulic oil to flow to the recovery chamber 311 to support the reverse movement of the shock-absorbing piston 32, while maintaining the normal flow of other oil circuits.

[0083] This not only achieves optimal distribution of hydraulic oil at each working stage, but also significantly reduces energy waste and mechanical wear caused by frequent forward and reverse rotation of traditional hydraulic pumps, lowering the overall energy consumption and noise level of the system. In addition, the coordinated operation of the controller, reversing component 2, first throttling component 6, second throttling component 7, and restoration on / off component 4 and compression on / off component 5 allows the system to seamlessly switch between fully active and semi-active modes. Even when the unidirectional hydraulic pump 1 malfunctions or requires maintenance, the system can still maintain basic damping force adjustment and vehicle balance control through the independent control of restoration on / off component 4 and compression on / off component 5 and the adjustment of reversing component 2, enhancing the reliability of the system and ensuring driving safety in emergency situations.

[0084] This embodiment provides an oil circuit control method. Figure 2 This is a flowchart of an oil circuit control method according to an embodiment of this application. This control method is applicable to the aforementioned hydraulic active suspension system, such as... Figure 2 As shown, the process includes the following steps:

[0085] S1. During the vehicle's operation, obtain the working status of the one-way hydraulic pump 1;

[0086] S2. When the one-way hydraulic pump 1 is in working state, the motion state of the shock absorber 3 is obtained so as to control the reversing component 2 to switch between the first station and the second station according to the motion state, so as to deliver hydraulic oil to the recovery chamber 311 or the compression chamber 312 under different motion states.

[0087] Specifically, the reversing component 2 has a first valve port 21, a second valve port 22, a third valve port 23, and a fourth valve port 24. The specific steps for acquiring the motion state of the damper 3 to control the reversing component 2 to switch between the first and second positions according to the motion state include:

[0088] When the one-way hydraulic pump 1 is in working condition, the road excitation frequency of the vehicle's suspension system is obtained;

[0089] Determine the frequency band region corresponding to the road surface excitation frequency, and determine the rotational speed of the unidirectional hydraulic pump 1 based on the frequency band region, and mark it as the target rotational speed;

[0090] Specifically, the frequency-speed correspondence table is traversed to determine the target frequency region corresponding to the road surface excitation frequency;

[0091] Based on the target frequency region, determine the preset rotational speed corresponding to the target frequency region and mark it as the target rotational speed. The frequency-rotational speed correspondence table includes multiple target frequency regions and the preset rotational speed corresponding to each target frequency region.

[0092] Obtain the motion state of the shock absorber 3;

[0093] The reversing position of the reversing component 2 and the opening degree of the compression switching component 5 and the restoration switching component 4 corresponding to the reversing position are determined according to the target speed and motion state.

[0094] When the target speed is within the first speed range and the motion state is compression, the first reversing station is activated, and a current within the first range is supplied to the compression switching component 5 and the recovery switching component 4 to control the opening degree of the compression switching component 5 and the recovery switching component 4; and / or,

[0095] When the target speed is within the first speed range and the motion state is in the recovery state, the reversing station becomes the second station, and a current within the first range is supplied to the compression switching component 5 and the recovery switching component 4 to control the opening degree of the compression switching component 5 and the recovery switching component 4; and / or,

[0096] When the target speed is within the second speed range and the motion state is compression, the first station of the reversing station switches to the first station and supplies current within the second range to the compression switching component 5 and the recovery switching component 4 to control the opening degree of the compression switching component 5 and the recovery switching component 4; and / or,

[0097] When the target speed is within the second speed range and the motion state is in the recovery state, the second station of the reversing station is activated, and current within the third range is supplied to the compression switching component 5 and the recovery switching component 4 to control the opening degree of the compression switching component 5 and the recovery switching component 4.

[0098] When the target speed is within the third speed range and the motion state is compression, the first station of the reversing station switches to the first station and supplies current within the third range to the compression switching component 5 and the recovery switching component 4 to control the opening degree of the compression switching component 5 and the recovery switching component 4; and / or,

[0099] When the target speed is within the third speed range and the motion state is in the recovery state, the second station of the reversing station is activated, and current within the third range is supplied to the compression switching component 5 and the recovery switching component 4 to control the opening degree of the compression switching component 5 and the recovery switching component 4.

[0100] While controlling the unidirectional hydraulic pump 1 to rotate at the target speed, control the hydraulic oil to be delivered to the compression chamber 312 or the recovery chamber 311 according to the reversing position;

[0101] The reversing station includes a first station and a second station. In the first station, the first valve port 21 is connected to the second valve port 22, the third valve port 23 is connected to the fourth valve port 24, the first valve port 21 is connected to the first oil circuit, the second valve port 22 is connected to the second oil circuit, the third valve port 23 is connected to the third oil circuit, and the fourth valve port 24 is connected to the fourth oil circuit. In the second station, the first valve port 21 is connected to the third valve port 23, and the second valve port 22 is connected to the fourth valve port 24.

[0102] S3. When the one-way hydraulic pump 1 is not in working state, the motion state of the shock absorber 3 is obtained, so as to control the hydraulic oil to flow from the recovery chamber 311 to the compression chamber 312, or control the hydraulic oil to flow from the compression chamber 312 to the recovery chamber 311 according to the motion state of the shock absorber 3.

[0103] The motion states of the shock absorber 3 include compression state and recovery state.

[0104] Specifically, when the one-way hydraulic pump 1 is in operation, the system first collects the road surface excitation frequency information. By consulting a pre-set frequency-speed correspondence table, it determines the target speed range that matches the current excitation frequency, namely the low-frequency range (0~5Hz), the medium-frequency range (5~15Hz), or the high-frequency range (>15Hz). This process ensures that the one-way hydraulic pump 1 can operate at the optimal speed, reducing unnecessary energy consumption and improving the system efficiency.

[0105] Subsequently, based on the target speed range and the shock absorber's motion state (compression or recovery), the controller adjusts the position of the reversing component 2, while simultaneously controlling the opening of the recovery on / off component 4 and the compression on / off component 5. For example, when the target speed is within the first speed range (high speed, ≥4000 rpm) and the shock absorber 3 is in the compression state, the reversing component 2 is in the first position. At this time, a high current (above 1.2A) is supplied to the recovery on / off component 4 and the compression on / off component 5 to achieve the maximum damping force adjustment range, ensuring the suspension system's rapid response and strong support on low-frequency, high-amplitude road sections. Conversely, when the shock absorber 3 is in the recovery state, the reversing component 2 switches to the second position, continuing to maintain a high current input to ensure that hydraulic oil flows smoothly from the recovery chamber 311 to the compression chamber 312, providing the required active force and damping adjustment.

[0106] As the excitation frequency changes, when the target speed enters the second speed range (medium speed, 1500~4000rpm), the controller will reduce the current to a medium level (0.6~1.2A). At this time, the commutation component 2 still remains in the first or second position according to the compression or recovery state of the shock absorber 3. By adjusting the opening of the compression switch component 5 and the recovery switch component 4, the system can better balance the active force and the damping force, providing moderate support in the mid-frequency range, neither too stiff nor too weak, to adapt to more diverse driving conditions.

[0107] Under high-frequency excitation (target speed ≤1500rpm), the system reduces the current to a lower level (<0.6A). At this time, the reversing component 2 continues to remain in the first or second position. By finely adjusting the opening of the compression switching component 5 and the restoration switching component 4, the system can achieve fine filtering of high-frequency small-amplitude vibrations and improve the vibration filtering capability and driving smoothness of the suspension by independently controlling the compression switching component 5 and the restoration switching component 4 when the speed of the one-way hydraulic pump 1 is low.

[0108] It is worth noting that when the one-way hydraulic pump 1 is not in operation, the system will automatically detect the motion state of the shock absorber 3 and control the flow of hydraulic oil inside the shock absorber 3 by independently adjusting the reset on / off component 4 and the compression on / off component 5. Even when the one-way hydraulic pump 1 stops, the system can still achieve damping force adjustment in semi-active mode through the intelligent control of the compression on / off component 5 and the reset on / off component 4, ensuring that the basic function of the suspension system is not affected and enhancing the redundancy and safety of the system.

[0109] Through the aforementioned hydraulic circuit control method, this application achieves precise regulation of hydraulic oil flow, ensuring high-performance operation of the suspension system under different excitation frequency conditions. This method not only effectively solves the space limitations, cost issues, and energy waste caused by multi-pump configurations in existing technologies, but also optimizes the distribution of hydraulic oil within the system through intelligent hydraulic circuit scheduling, improving the speed and accuracy of suspension response, reducing the overall energy consumption and noise level of the system. Furthermore, by avoiding frequent forward and reverse pump rotation, it extends the pump's service life and reduces maintenance costs.

[0110] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0111] According to an embodiment of this application, an embodiment of an oil circuit control device is provided. It should be noted that the device can be used to perform the above-described oil circuit control method.

[0112] The hydraulic circuit control device includes an acquisition module configured to acquire the working state of the one-way hydraulic pump 1 during vehicle operation. The acquisition module is connected to a first control module configured to acquire the motion state of the shock absorber 3 when the one-way hydraulic pump 1 is in the working state, so as to control the reversing component 2 to switch between a first station and a second station according to the motion state, so as to deliver hydraulic oil to the recovery chamber 311 or the compression chamber 312 under different motion states. The first control module is connected to a second control module configured to acquire the motion state of the shock absorber 3 when the one-way hydraulic pump 1 is not in the working state, so as to control the hydraulic oil to flow from the recovery chamber 311 to the compression chamber 312, or control the hydraulic oil to flow from the compression chamber 312 to the recovery chamber 311 according to the motion state of the shock absorber 3.

[0113] Embodiments of this application also provide a vehicle, including: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods described in various embodiments of this application when it runs.

[0114] Embodiments of this application also provide a computer-readable storage medium including a stored executable program, wherein, when the executable program is running, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of this application.

[0115] Embodiments of this application also provide a computer program product, including a computer program that, when executed by a processor, implements the methods of various embodiments of this application.

[0116] Embodiments of this application also provide a computer program product, including a non-volatile computer-readable storage medium for storing a computer program that, when executed by a processor, implements the methods in various embodiments of this application.

[0117] Embodiments of this application also provide a computer program that, when executed by a processor, implements the methods described in the various embodiments of this application.

[0118] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0119] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0120] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0121] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0122] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0123] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A hydraulic active suspension system, suitable for use in a vehicle, characterised in that, The hydraulic active suspension system comprises: a one-way hydraulic pump (1), a reversing component (2), a shock absorber (3), the shock absorber (3) comprising a shock absorbing chamber (31) and a shock absorbing piston (32) movably arranged in the shock absorbing chamber (31) to divide the shock absorbing chamber (31) into a recovery chamber (311) and a compression chamber (312) with variable volume by the shock absorbing piston (32); a first oil path, both ports of which are respectively communicated with an outlet end of the one-way hydraulic pump (1) and the reversing component (2); a second oil path, both ports of which are respectively communicated with the reversing component (2) and the recovery chamber (311); a third oil path, both ports of which are respectively communicated with the compression chamber (312) and the reversing component (2); a fourth oil path, both ports of which are respectively communicated with the reversing component (2) and an inlet end of the one-way hydraulic pump (1); wherein the reversing component (2) is arranged on the first oil path and the third oil path, the shock absorber (3) has a recovery state and a compression state, when the shock absorber (3) is in the compression state, the first oil path is communicated with the second oil path under the action of the reversing component (2), and the fourth oil path is communicated with the third oil path under the action of the reversing component (2); when the shock absorber (3) is in the recovery state, the first oil path is communicated with the third oil path under the action of the reversing component (2), and the second oil path is communicated with the fourth oil path under the action of the reversing component (2), so as to control the reciprocating movement of the shock absorbing piston (32) in the shock absorbing chamber (31) by respectively conveying hydraulic oil into the compression chamber (312) and the recovery chamber (311).

2. The hydraulically active suspension system of claim 1, wherein, The system further comprises: a fifth oil path, both ports of which are respectively communicated with the recovery chamber (311) and the compression chamber (312); a recovery on-off component (4) arranged on the fifth oil path to adjust the flow of the hydraulic oil from the recovery chamber (311) into the compression chamber (312); a controller communicated with the recovery on-off component (4) and the one-way hydraulic pump (1) to control the flow of the hydraulic oil into the compression chamber (312) by controlling the opening degree of the recovery on-off component (4) according to the working state of the one-way hydraulic pump (1) when the shock absorber (3) is in the recovery state.

3. The hydraulically active suspension system of claim 1, wherein, The system further comprises: a sixth oil path, both ports of which are respectively communicated with the recovery chamber (311) and the compression chamber (312); a compression on-off component (5) arranged on the sixth oil path to adjust the flow of the hydraulic oil from the compression chamber (312) into the recovery chamber (311); A controller is in communication with the compression on-off component (5) and the one-way hydraulic pump (1) to control the flow of hydraulic oil into the recovery chamber (311) by controlling the opening of the compression on-off component (5) according to the working state of the one-way hydraulic pump (1) when the shock absorber (3) is in the compression state.

4. The hydraulically active suspension system of claim 1, wherein, The system further comprises: A first throttling component (6) is arranged on the second oil path to control the flow of hydraulic oil from the one-way hydraulic pump (1) to the recovery chamber (311) when the shock absorber (3) is in the recovery state; and / or, A second throttling component (7) is arranged on the third oil path to control the flow of hydraulic oil from the one-way hydraulic pump (1) to the compression chamber (312) when the shock absorber (3) is in the compression state; and / or, The reversing component (2) has a first valve port (21), a second valve port (22), a third valve port (23), and a fourth valve port (24). The first valve port (21) is in communication with the second valve port (22), and the third valve port (23) is in communication with the fourth valve port (24). When the shock absorber (3) is in the compression state, the first valve port (21) is in communication with the first oil path, the second valve port (22) is in communication with the second oil path, the third valve port (23) is in communication with the third oil path, and the fourth valve port (24) is in communication with the fourth oil path. At this time, the reversing component (2) is in the first working position. When the shock absorber (3) is in the recovery state, the first valve port (21) is in communication with the third valve port (23), and the second valve port (22) is in communication with the fourth valve port (24). At this time, the reversing component (2) is in the second working position.

5. An oil passage control method characterized by The control method is applicable to the hydraulic active suspension system of any one of claims 1 to 4, and the method comprises: During the driving of the automobile, the working state of the one-way hydraulic pump (1) is obtained; When the one-way hydraulic pump (1) is in the working state, the motion state of the shock absorber (3) is obtained to control the reversing component (2) to switch between the first working position and the second working position according to the motion state, so as to deliver hydraulic oil into the recovery chamber (311) or the compression chamber (312) under different motion states; When the one-way hydraulic pump (1) is in the non-working state, the motion state of the shock absorber (3) is obtained to control the flow of hydraulic oil from the recovery chamber (311) to the compression chamber (312) or control the flow of hydraulic oil from the compression chamber (312) to the recovery chamber (311) according to the motion state of the shock absorber (3); The motion state of the shock absorber (3) includes the compression state and the recovery state.

6. The oil passage control method according to claim 5, characterized by The reversing component (2) has a first valve port (21), a second valve port (22), a third valve port (23) and a fourth valve port (24), the step of obtaining the motion state of the shock absorber (3) to control the reversing component (2) to switch between the first station and the second station according to the motion state comprises: When the one-way hydraulic pump (1) is in the working state, the frequency of the road excitation received by the suspension system of the automobile is obtained; Determine the frequency band region corresponding to the road excitation frequency, determine the rotating speed of the one-way hydraulic pump (1) according to the frequency band region, and mark it as the target rotating speed; Obtain the motion state of the shock absorber (3); According to the target rotating speed and the motion state, determine the reversing station of the reversing component (2) and the opening of the compression on-off component (5) and the recovery on-off component (4) corresponding to the reversing station; Control the one-way hydraulic pump (1) to rotate at the target rotating speed, and control the hydraulic oil to be delivered into the compression cavity (312) or the recovery cavity (311) according to the reversing station; Wherein, the reversing station includes a first station and a second station, in the first station, the first valve port (21) and the second valve port (22) are communicated, the third valve port (23) and the fourth valve port (24) are communicated, the first valve port (21) and the first oil path are communicated, the second valve port (22) and the second oil path are communicated, the third valve port (23) and the third oil path are communicated, the fourth valve port (24) and the fourth oil path are communicated; in the second station, the first valve port (21) and the third valve port (23) are communicated, and the second valve port (22) and the fourth valve port (24) are communicated.

7. The oil passage control method according to claim 6, characterized by The step of determining the frequency band region corresponding to the road excitation frequency to determine the rotating speed of the one-way hydraulic pump (1) according to the frequency band region and marking it as the target rotating speed comprises: Traverse the frequency rotating speed corresponding table to determine the target frequency region corresponding to the road excitation frequency; According to the target frequency region, determine the preset rotating speed corresponding to the target frequency region and mark it as the target rotating speed, wherein the frequency rotating speed corresponding table includes a plurality of target frequency regions and a preset rotating speed corresponding to each target frequency region.

8. The oil passage control method according to claim 6, characterized by The step of determining the reversing station of the reversing component (2) according to the target rotating speed and the motion state comprises: When the target rotating speed is in the first rotating speed range and the motion state is the compression state, the reversing station is the first station, and the current in the first range is input to the compression on-off component (5) and the recovery on-off component (4) to control the opening of the compression on-off component (5) and the recovery on-off component (4); and / or, When the target rotating speed is in the first rotating speed range and the motion state is the recovery state, the switching position is the second position, and the current in the first range is supplied to the compression on-off component (5) and the recovery on-off component (4) to control the opening degree of the compression on-off component (5) and the recovery on-off component (4); and / or, When the target rotating speed is in the second rotating speed range and the motion state is the compression state, the switching position is the first position, and the current in the second range is supplied to the compression on-off component (5) and the recovery on-off component (4) to control the opening degree of the compression on-off component (5) and the recovery on-off component (4); and / or, When the target rotating speed is in the second rotating speed range and the motion state is the recovery state, the switching position is the second position, and the current in the third range is supplied to the compression on-off component (5) and the recovery on-off component (4) to control the opening degree of the compression on-off component (5) and the recovery on-off component (4); When the target rotating speed is in the third rotating speed range and the motion state is the compression state, the switching position is the first position, and the current in the third range is supplied to the compression on-off component (5) and the recovery on-off component (4) to control the opening degree of the compression on-off component (5) and the recovery on-off component (4); and / or, When the target rotating speed is in the third rotating speed range and the motion state is the recovery state, the switching position is the second position, and the current in the third range is supplied to the compression on-off component (5) and the recovery on-off component (4) to control the opening degree of the compression on-off component (5) and the recovery on-off component (4).

9. A vehicle characterized by comprising: Comprise: a memory, which stores an executable program; a processor, which is configured to run the program, wherein the program, when running, performs the method of any one of claims 5 to 8.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium comprises a stored executable program, wherein the executable program, when running, controls the device where the storage medium is located to perform the method of any one of claims 5 to 8.

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