Novel double-electromagnetic-valve full-active suspension actuator

Abstract

The invention provides a novel double-electromagnetic-valve full-active suspension actuator. The novel double-electromagnetic-valve full-active suspension actuator comprises a shock absorber, a hydraulic valve block, a recovery electromagnetic valve and a compression electromagnetic valve. The hydraulic valve block is arranged at the cylinder bottom in a sealed mode and internally provided with a compression oil channel communicated with the lower cavity of the working cylinder and a recovery oil channel communicated with the upper cavity of the working cylinder, and the compression oil channel and the recovery oil channel are outwards connected with a power pump. The recovery electromagnetic valve is arranged on the outer wall of the oil storage cylinder, is communicated with the upper cavity and the oil storage cylinder, and is also provided with a recovery one-way valve communicated with the oil storage cylinder and the upper cavity; the compression electromagnetic valve is connected to the valve block and communicated with the lower cavity and the oil storage cylinder, and is further provided with a compression one-way valve communicated with the oil storage cylinder and the lower cavity. According to the novel double-electromagnetic-valve full-active suspension actuator, the structure is optimized, the occupied space of a chassis is reduced, the actuator has multiple working modes including a full-active mode, an active ADS mode and an ADS mode, full-active adjustment with higher jacking capacity and compression capacity can be achieved, the damping adjustment broadband in the ADS mode is increased, and the energy recovery function is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of active suspension, and in particular to a novel dual-solenoid valve fully active suspension actuator. Background Art

[0002] The fully active suspension system senses different driving conditions through sensor technology, controls the output of the active suspension actuator according to the system strategy, and adjusts the vehicle posture and suspension stiffness and damping performance in real time, taking into account the vehicle's handling stability and smoothness, and improving the vehicle's passability and safety. At present, the widely used air suspension has a slow response time and cannot adjust the vehicle posture in real time; the damping adjustable suspension equipped with solenoid valves or magnetorheological shock absorbers cannot adjust the vehicle height and suspension stiffness without an external power source.

[0003] The fully active suspension actuator provides active lifting force for the suspension through an external power pump to achieve active control of the vehicle posture. However, the existing active suspension actuators have the problems of occupying a large chassis space and high energy consumption of active lifting force. Summary of the invention

[0004] In order to better solve the above problems, the present invention provides a new dual-solenoid valve fully active suspension actuator, which can optimize the structure, reduce the space occupied by the chassis, and achieve fully active adjustment of greater lifting and compression capabilities, increase the damping adjustment bandwidth in the ADS mode, and realize energy recovery function.

[0005] To achieve the above-mentioned purpose, an embodiment of the present invention provides a novel dual-solenoid valve fully active suspension actuator, including a shock absorber, a restoring solenoid valve, a compression solenoid valve, and a hydraulic valve block; the hydraulic valve block is arranged at the bottom of the oil storage cylinder of the shock absorber, and has a compression oil passage connected to the lower chamber of the working cylinder upward and a recovery oil passage connected to the middle cylinder upward, and the compression oil passage and the recovery oil passage are respectively provided with a compression oil pipe joint and a recovery oil pipe joint that can be connected to the two ends of the power pump; the oil inlet end of the restoring solenoid valve is connected to the upper chamber of the working cylinder through the middle cylinder, and the oil outlet end is connected to the oil storage cylinder; the restoring solenoid valve is provided with a restoring check valve, the oil inlet end is connected to the oil storage cylinder, and the oil outlet end is connected to the upper chamber of the working cylinder through the middle cylinder; the oil inlet end of the compression solenoid valve is connected to the compression oil passage, and the oil outlet end is connected to the oil storage cylinder; the compression solenoid valve is provided with a compression check valve, the oil inlet end is connected to the oil storage cylinder, and the oil outlet end is connected to the compression oil passage; The new dual-solenoid valve fully active suspension actuator includes a fully active mode, an active ADS mode, and an ADS mode; in the fully active mode, the oil in the upper chamber of the working cylinder flows through the intermediate cylinder into the recovery oil passage and then into the power pump, and after being pressurized by the power pump, flows into the lower chamber of the working cylinder through the compression oil passage, causing the piston rod to move upward; the oil in the lower chamber of the working cylinder flows into the power pump through the compression oil passage, and after being pressurized by the power pump, flows into the intermediate cylinder through the recovery oil passage and then into the upper chamber of the working cylinder, causing the piston rod to move downward; in the active ADS mode, when the piston rod moves upward, the oil in the upper chamber of the working cylinder flows through the intermediate cylinder into the recovery solenoid valve, and then flows into the compression oil passage through the compression check valve and then into the lower chamber of the working cylinder, and the power pump flows to the upper chamber of the working cylinder. Pressurize to increase the restoring damping or pressurize the lower chamber of the working cylinder to reduce the restoring damping; when the piston rod moves downward, the oil in the lower chamber of the working cylinder flows into the compression solenoid valve through the compression oil channel, and then flows into the middle cylinder through the restoring check valve and then flows into the upper chamber of the working cylinder. The power pump pressurizes the lower chamber of the working cylinder to increase the compression damping or pressurizes the upper chamber of the working cylinder to reduce the compression damping; in ADS mode, the power pump is closed; when the piston rod moves upward, the oil in the upper chamber of the working cylinder flows into the restoring solenoid valve through the middle cylinder, and then flows into the compression oil channel through the compression check valve and then flows into the lower chamber of the working cylinder; when the piston rod moves downward, the oil in the lower chamber of the working cylinder flows into the compression solenoid valve through the compression oil channel, and then flows into the middle cylinder through the restoring check valve and then flows into the upper chamber of the working cylinder.

[0006] Optionally, it also includes an accumulator, which is connected to the oil storage cylinder; in the fully active mode, when the piston rod moves upward, the oil in the accumulator flows into the oil storage cylinder and then flows into the middle cylinder through the recovery one-way valve, and flows into the recovery oil channel together with the oil flowing into the middle cylinder from the upper chamber of the working cylinder; when the piston rod moves downward, part of the oil in the lower chamber of the working cylinder passes through the compression oil channel and flows into the accumulator through the compression solenoid valve; in the active ADS mode and ADS mode, when the piston rod moves upward, the oil in the accumulator flows into the oil storage cylinder, flows into the compression oil channel through the compression one-way valve and then flows into the lower chamber of the working cylinder; when the piston rod moves downward, part of the oil flows into the accumulator through the compression solenoid valve Optionally, the power pump is connected to a generator through transmission, and the new dual-solenoid valve fully active suspension actuator also includes an energy recovery mode. In the energy recovery mode, the power pump switches to the power generation mode; when the piston rod moves upward, the oil in the upper chamber of the working cylinder flows into the recovery oil channel through the intermediate cylinder and then into the power pump, and then flows into the compression oil channel through the power pump and then into the lower chamber of the working cylinder; when the piston rod moves downward, the oil in the lower chamber of the working cylinder flows into the power pump through the compression oil channel, and then flows into the recovery oil channel through the power pump and then flows into the upper chamber of the working cylinder through the guide chamber; the oil flowing through the power pump drives the power pump to rotate and then drives the generator to generate electricity.

[0007] Compared with the prior art, the novel dual-solenoid valve fully active suspension actuator of the present invention has the following beneficial effects: The new dual-solenoid valve fully active suspension actuator has a reasonable structural design. The structure is optimized by centrally arranging the compression solenoid valve, return solenoid valve, hydraulic valve block and power pump at the end of the shock absorber body. Compared with the structure of arranging two solenoid valves outside the cylinder body, it can reduce the occupied chassis space, and there is no need for more avoidance design at the cylinder barrel, which is more conducive to chassis development and vehicle layout.

[0008] This new dual-solenoid valve fully active suspension actuator has multiple working modes. In the fully active working mode, the power pump pressurizes the piston rod to provide lifting and compression capabilities when it moves up and down, realizing fully active lifting and compression functions, and the lifting and compression capabilities are greater, which can realize active lifting and lowering of the vehicle body and on-the-spot jumping functions; in the ADS mode, the restoring damping and compression damping can be adjusted by controlling the valve opening of the restoring solenoid valve and the compression solenoid valve; in the active ADS mode, the power pump can be used to pressurize the upper and lower chambers of the working cylinder to further achieve a wider bandwidth of damping adjustment; in the energy recovery mode, the oil flow through the power pump can be used to drive the external power generation module to generate electricity, thereby realizing the energy recovery function. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0010] Figure 1 The structure of the new dual solenoid valve fully active suspension actuator according to the present invention is shown in FIG. Figure 1 ; Figure 2 The structure of the new dual solenoid valve fully active suspension actuator according to the present invention is shown in FIG. Figure 2 ; Figure 3 It is a schematic diagram of the principle of a novel dual-solenoid valve fully active suspension actuator according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the principle of an embodiment of the present invention in a fully active mode; Figure 5 It is a schematic diagram of the small damping principle in the active ADS mode of an embodiment of the present invention; Figure 6 A schematic diagram of the large damping principle in the active ADS mode of an embodiment of the present invention; Figure 7 It is a schematic diagram of the principle of an embodiment of the present invention in ADS mode; Figure 8 It is a schematic diagram of the principle of the energy recovery mode of an embodiment of the present invention.

[0011] Reference numerals: 1. Oil storage cylinder; 2. Working cylinder; 3. Intermediate cylinder; 4. Guide assembly; 5. Piston rod; 6. Hydraulic valve block; 7. Restoration solenoid valve; 8. Compression solenoid valve; 9. Accumulator; 10. Restoration oil pipe joint; 11. Compression oil pipe joint; 12. Upper chamber; 13. Lower chamber; 14. Restoration check valve; 15. Compression check valve; 16. Power pump; 17. Generator. DETAILED DESCRIPTION

[0012] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited to the basic implementation disclosed below.

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0014] like Figure 1-3 As shown, a novel dual-solenoid valve fully active suspension actuator shock absorber according to an embodiment of the present invention comprises an oil storage cylinder 1, an intermediate cylinder 3 and a working cylinder 2 which are coaxially sleeved, the oil storage cylinder 1 being located outside, the working cylinder 2 being coaxially sleeved in the oil storage cylinder 1, and the intermediate cylinder 3 sealing sleeve being arranged between the working cylinder 2 and the oil storage cylinder 1; a working chamber is formed in the working cylinder 2, a guide chamber is formed between the inner wall of the intermediate cylinder 3 and the working cylinder 2, an oil storage chamber is formed between the oil storage cylinder 1 and the working cylinder 2 (including the outer wall portion of the intermediate cylinder 3), and the working chamber, the guide chamber and the oil storage chamber are filled with hydraulic oil.

[0015] The shock absorber also includes a piston assembly, which includes a piston rod 5 and a guide assembly 4. The guide assembly 4 is sealed and arranged at the top of the oil storage cylinder 1 and the working cylinder 2, and a guide hole is arranged at the center; the piston rod 5 is arranged in the working chamber, the upper end extends out of the guide hole, and the lower end divides the working chamber into an upper chamber 12 and a lower chamber 13. Here, the guide assembly 4 can be a downward multi-step convex structure, the lower end step extends into the top of the working cylinder 2, the middle step extends into the top of the oil storage cylinder 1, and the upper end step is stuck on the outside of the top of the oil storage cylinder 1. The connection between each step is sealed, for example, an oil seal and a sealing ring are arranged. The guide hole matches the size of the piston rod 5 (the inner diameter of the guide hole is equal to the outer diameter of the piston rod 5), and the piston rod 5 can move up and down along the guide hole. A through hole is opened on the outer wall of the upper chamber 12 of the working cylinder 2 corresponding to the upper part of the intermediate cylinder 3, so that the upper chamber 12 of the working cylinder 2 is connected with the diversion chamber.

[0016] The novel dual-solenoid valve fully active suspension actuator further includes a hydraulic valve block 6 , a restoring solenoid valve 7 , a compression solenoid valve 8 , and an accumulator 9 .

[0017] The hydraulic valve block 6 is sealed and arranged at the bottom of the oil storage cylinder 1 and the working cylinder 2. The hydraulic valve block 6 has a plurality of oil channels inside, including a compression oil channel and a recovery oil channel. The upper end of the compression oil channel is connected to the bottom of the lower chamber 13 of the working cylinder 2, and the upper end of the recovery oil channel is connected to the bottom of the guide chamber. The lower ends of the compression oil channel and the recovery oil channel extend outward, and a compression oil pipe joint 11 and a recovery oil pipe joint 10 are respectively arranged at the outer ends, and the two oil pipe joints are respectively connected to the two ends of the power pump 16. Here, the power pump 16 is externally connected to the actuator of the embodiment of the present invention through two oil pipe joints.

[0018] The restoration solenoid valve 7 can be connected to the outer wall of the oil storage cylinder 1. The restoration solenoid valve 7 can be fixedly installed in the valve seat and sealed by installing a tubular valve seat extending outward on the outer wall of the oil storage cylinder 1. The inner side of the valve seat has two through holes, namely, the oil inlet and the oil outlet. The inner side of the oil inlet is connected to the middle cylinder 3, and the inner side of the oil outlet is connected to the oil storage cylinder 1. The outer sides of the oil inlet and the oil outlet form a connected restoration oil path in the valve seat; that is, the oil inlet end of the restoration solenoid valve 7 is connected to the guide chamber and then can be connected to the upper chamber 12 of the working cylinder 2, and the oil outlet end is connected to the oil storage chamber (oil storage cylinder). The oil in the upper chamber 12 of the working cylinder 2 can flow into the guide chamber and then flow into the oil storage chamber through the restoration solenoid valve 7. The restoration solenoid valve 7 is also provided with a restoration one-way valve 14. The oil circuit of the restoration one-way valve 14 is opposite to the direction of the restoration oil circuit of the restoration solenoid valve 7. The oil inlet end of the restoration one-way valve 14 is connected to the oil storage chamber, and the oil outlet end is connected to the guide chamber, so that the oil in the oil storage chamber can flow into the guide chamber through the restoration one-way valve 14.

[0019] The compression solenoid valve 8 can be connected to the hydraulic valve block 6. The compression solenoid valve 8 can be fixedly installed in the valve seat and sealed by installing a valve seat extending outward in the hydraulic valve block 6. The inner side of the valve seat has two through holes, namely, an oil inlet and an oil outlet. The inner side of the oil inlet is connected to the compression oil passage in the valve block, and the inner side of the oil outlet is connected upward to the bottom of the oil storage cylinder 1. The outer sides of the oil inlet and the oil outlet form a connected compression oil passage in the valve seat; that is, the oil inlet end of the compression solenoid valve 8 is connected to the compression oil passage, and the oil outlet end is connected to the oil storage chamber, so that the oil in the compression oil passage can flow into the oil storage chamber through the compression solenoid valve 8. The compression solenoid valve 8 also has a compression check valve 15. The oil passage of the compression check valve 15 is opposite to the direction of the compression oil passage of the compression solenoid valve 8. The oil inlet end of the compression check valve 15 is connected to the oil storage chamber, and the oil outlet end is connected to the compression oil passage, so that the oil in the oil storage chamber can flow into the compression oil passage through the compression check valve 15.

[0020] The accumulator 9 can be connected to the hydraulic valve block 6. The accumulator 9 includes two chambers, an air chamber and an oil chamber. The air chamber is filled with high-pressure gas, and oil can flow into or out of the oil chamber. The valve block has an energy storage oil channel, one end of which is connected to the oil chamber of the accumulator 9, and the other end is connected to the bottom of the oil storage cavity. That is, the accumulator 9 is connected to the bottom of the oil storage cavity through the energy storage oil channel. The accumulator 9 can adjust the pressure of the shock absorber by converting the active storage and release of oil, and perform oil compensation adjustment on the shock absorber to compensate for the oil volume occupied by the piston rod.

[0021] One end of the power pump 16 is connected to the upper chamber 12 of the working cylinder 2 through the recovery oil passage and the guide chamber, and the other end is connected to the lower chamber 13 of the working cylinder 2 through the compression oil passage. The power pump 16 is externally connected through two oil pipe joints and the hydraulic valve block 6 to achieve oil passage communication with the upper and lower chambers 13 of the working cylinder 2, and can pressurize the upper and lower chambers of the working cylinder 2. By controlling the pressurization, a pressure difference can be generated between the upper and lower chambers. The input end of the generator 17 is connected to the power pump, and specifically, the impeller of the power pump can be connected to the power input end of the generator through a connecting shaft, and the impeller of the power pump can be used to drive the generator to generate electricity.

[0022] like Figure 3-8 As shown, the working modes of the novel dual-solenoid valve full-active suspension actuator according to the embodiment of the present invention include a full-active mode, an active ADS mode, an ADS mode and an energy recovery mode.

[0023] In the fully active working mode, part of the oil in the upper chamber 12 of the working cylinder 2 flows into the diversion chamber (middle cylinder), flows into the recovery oil passage through the diversion chamber, and then flows into the power pump 16 through the recovery oil passage, and then flows into the lower chamber 13 of the working cylinder 2 through the compression oil passage after being pressurized by the power pump 16, so that the piston rod 5 moves upward. Part of the oil in the lower chamber 13 of the working cylinder 2 flows into the compression oil passage, flows into the power pump 16 through the compression oil passage, flows into the recovery oil passage after being pressurized by the power pump 16, flows into the diversion chamber through the recovery oil passage, and then flows into the upper chamber 12 of the working cylinder 2 through the diversion chamber, so that the piston rod 5 moves downward. In this active working mode, the external power pump 16 drives the oil flow by pressurizing the oil, and can control the pressure of the upper and lower chambers of the working cylinder 2 to make the piston rod move upward or downward, generate lifting capacity and compression capacity, and can realize the fully active lifting function with large lifting capacity and the fully active compression function with large compression capacity, so as to realize the active lifting and lowering of the vehicle body and the function of taking off in situ.

[0024] At the same time, in the fully active working mode, the accumulator 9 can adjust the pressure in the hydraulic oil circuit by converting the active storage and release of oil, and make oil compensation adjustments to the shock absorber. When the piston rod 5 moves upward, the oil in the accumulator 9 flows into the oil storage chamber, flows into the recovery check valve 14 through the oil storage chamber, and then flows into the guide chamber through the recovery check valve 14, and flows into the recovery oil channel together with the oil flowing into the guide chamber in the upper chamber 12 of the working cylinder 2, and flows into the upper chamber 12 of the working cylinder 2 after being pressurized by the power pump 16. When the piston rod 5 moves downward, after the oil in the lower chamber 13 of the working cylinder 2 flows into the compression oil channel, part of the oil in the compression oil channel flows into the compression solenoid valve 8, flows into the oil storage chamber through the compression solenoid valve 8, and then flows into the accumulator 9 through the oil storage chamber.

[0025] In the active ADS mode, the power pump 16 can pressurize the upper chamber 12 of the working cylinder 2 through the recovery oil channel, or pressurize the lower chamber 13 of the working cylinder 2 through the compression oil channel. When the piston rod 5 moves upward, part of the oil in the upper chamber 12 of the working cylinder 2 flows into the guide chamber, flows into the recovery solenoid valve 7 through the guide chamber, and then flows into the oil storage chamber through the recovery solenoid valve 7 and then flows into the compression check valve 15, and then flows into the compression oil channel through the compression check valve 15, and then flows into the lower chamber 13 of the working cylinder 2 through the compression oil channel. In this recovery stroke, the pressure difference between the upper and lower chambers of the working cylinder can be controlled by controlling the valve opening of the recovery solenoid valve and the power pump pressurization method, thereby generating a recovery damping force; if a large recovery damping is required, such as Figure 6 As shown in (left), the power pump 16 can be used to pressurize the upper chamber 12 of the working cylinder 2 to increase the pressure difference between the upper and lower chambers, thereby increasing the restoring damping force; if a small restoring damping is required, such as Figure 5As shown in (left), the power pump 16 can be used to pressurize the lower chamber 13 of the working cylinder 2 to reduce the pressure difference between the upper and lower chambers, thereby reducing the restoring damping force, thereby increasing the restoring damping adjustment bandwidth. When the piston rod 5 moves downward, part of the oil in the lower chamber 13 of the working cylinder 2 flows into the compression oil channel, flows into the compression solenoid valve 8 through the compression oil channel, and then flows into the oil storage chamber through the compression solenoid valve 8 and then flows into the restoring check valve 14, and then flows into the guide chamber through the restoring check valve 14, and then flows into the upper chamber 12 of the working cylinder 2 after passing through the guide chamber. In this compression stroke, the pressure difference between the upper and lower chambers of the working cylinder can be controlled by controlling the valve opening of the restoring solenoid valve and the power pump pressurization method, thereby generating a compression damping force; if large compression damping is required, such as Figure 6 As shown in (right), the power pump 16 can be used to pressurize the lower chamber 13 of the working cylinder 2 to increase the pressure difference between the upper and lower chambers, thereby increasing the compression damping force; if a small compression damping is required, such as Figure 5 As shown in (right), the power pump 16 can be used to pressurize the upper chamber 12 of the working cylinder 2 to reduce the pressure difference between the upper and lower chambers, thereby reducing the compression damping force, thereby increasing the compression damping adjustment bandwidth.

[0026] At the same time, when the piston rod 5 moves upward, the accumulator 9 releases oil, and the oil in the accumulator 9 flows into the oil storage chamber, and flows into the compression check valve 15 together with the oil flowing out of the upper chamber 12 of the working cylinder 2 through the restoration solenoid valve 7, and then flows into the compression oil channel through the compression check valve 15 and then flows into the lower chamber 13 of the working cylinder 2; when the piston rod 5 moves downward, the accumulator 9 stores oil, and part of the oil flowing out of the lower chamber 13 of the working cylinder 2 through the compression solenoid valve 8 and into the oil storage chamber flows into the accumulator 9.

[0027] In the ADS mode, the power pump 16 is closed; when the piston rod 5 moves upward, the oil in the upper chamber 12 of the working cylinder 2 flows into the restoration solenoid valve 7 through the guide chamber, and then flows into the compression oil passage through the compression check valve 15 and then flows into the lower chamber 13 of the working cylinder 2; when the piston rod 5 moves downward, the oil in the lower chamber 13 of the working cylinder 2 flows into the compression solenoid valve 8 through the compression oil passage, and then flows into the guide chamber through the restoration check valve 14 and then flows into the upper chamber 12 of the working cylinder 2. The oil flow direction in this ADS mode is the same as that in the active ADS mode, except that there is no power pump 16 pressurization, and the restoration damping is adjusted by controlling the valve opening of the restoration solenoid valve 7, and the compression damping is adjusted by controlling the valve opening of the compression solenoid valve 8.

[0028] At the same time, when the piston rod 5 moves upward, the accumulator 9 releases oil, and the oil in the accumulator 9 flows into the oil storage chamber, flows into the compression oil channel through the compression check valve 15, and then flows into the lower chamber 13 of the working cylinder 2; when the piston rod 5 moves downward, the accumulator 9 stores oil, and part of the oil flows into the accumulator 9 through the compression solenoid valve 8. The method of oil compensation of the accumulator 9 in the active ADS mode is the same.

[0029] In the energy recovery mode, the power pump 16 switches to the power generation mode. Here, the power pump 16 is externally connected to a power generation module (such as a generator 17). In the power generation mode, the power pump 16 is converted from an active electric drive rotation mode to a passive rotation mode, and can rotate with the flow of oil to drive the power generation module to generate electricity. When the piston rod 5 moves upward, the oil in the upper chamber 12 of the working cylinder 2 flows into the diversion chamber, flows into the recovery oil channel through the diversion chamber, and then flows into the power pump 16 through the recovery oil channel, and then flows into the compression oil channel after the power pump 16, and flows into the lower chamber 13 of the working cylinder 2 through the compression oil channel; when the piston rod 5 moves downward, the oil in the lower chamber 13 of the working cylinder 2 flows into the compression oil channel, flows into the power pump 16 through the compression oil channel, flows into the recovery oil channel after the power pump 16, and then flows into the diversion chamber and then into the upper chamber 12 of the working cylinder 2. When the oil flows through the power pump 16, the oil can drive the power pump 16 to rotate, thereby driving the external generator 17 to rotate to generate electricity and realize energy recovery.

[0030] At the same time, when the piston rod 5 moves upward, the accumulator 9 releases oil, and the oil in the accumulator 9 flows into the oil storage chamber, flows into the compression oil channel through the compression check valve 15, and then flows into the lower chamber 13 of the working cylinder 2; when the piston rod 5 moves downward, the accumulator 9 stores oil, the compression solenoid valve 8 is closed, and part of the oil that flows into the guide chamber flows into the accumulator 9 through the recovery solenoid valve 7.

[0031] In the novel dual-solenoid valve fully active suspension actuator, the restoring solenoid valve 7, the compression solenoid valve 8 and the hydraulic valve block 6 are arranged at the end of the shock absorber cylinder or near the end. The structure is optimized by integrating them at the end of the shock absorber body. Compared with the existing structure in which two solenoid valves are arranged on the outside of the cylinder, the chassis space occupied by the actuator can be reduced. There is no need for more avoidance designs outside the end, which will not affect the overall structural strength and reduce the initial research and development and production costs of the shock absorber.

[0032] According to an exemplary embodiment of the present invention, the novel dual-solenoid valve fully active suspension actuator includes two groups of shock absorbers, which are respectively the left and right shock absorbers of the fully active suspension, each shock absorber is connected to the above-mentioned restoring and compression solenoid valves, as well as the hydraulic valve block and the power pump, and has multiple working modes. The novel dual-solenoid valve fully active suspension actuator can be applied to the vehicle active suspension system, and cooperate with the electric pump assembly (including two groups of left and right motor-hydraulic pump units, respectively used to drive the left and right shock absorbers), the control system of the active suspension system sends control signals to the restoring solenoid valve 7, the compression solenoid valve 8, the power pump 16 and other components according to the real-time vehicle driving conditions, and can realize the continuous adjustment of the restoring and compression damping by controlling the power pump 16 to pressurize the upper and lower chambers of the working cylinder 2, controlling the opening of the electromagnetic valve, etc., and increasing the adjustable range of the restoring and compression damping, improving the active lifting and compression capabilities, thereby improving the vehicle body control capability, ensuring the smooth form of the vehicle, and improving the driving comfort of the vehicle.

[0033] In actual application scenarios, the oil storage cylinder 1, working cylinder 2, piston assembly, restoring solenoid valve 7, compression solenoid valve 8, power pump 16 and other equipment or components in the new dual-solenoid valve fully active suspension actuator of the embodiment of the present invention can be designed accordingly according to the shock absorber specification signal, damping force adjustment requirements, etc. in actual working conditions, or adopt equipment with corresponding functions and specifications in the existing technology.

[0034] Furthermore, in the embodiment of the present invention, the restoring solenoid valve 7, the compression solenoid valve 8, the accumulator 9 and other devices or components are not limited to the above-mentioned arrangement. In practical applications, the actual installation positions of the devices or components can also be adjusted to realize the practical application or other functions of the novel dual-solenoid valve fully active suspension actuator. For example, the position of the restoring solenoid valve 7 on the outer wall of the oil storage cylinder 1 can be flexibly arranged, and can also be installed on the hydraulic valve block 6, as long as the above-mentioned functions can be realized.

[0035] It should be noted that, according to implementation needs, the various components described in the embodiments of the present invention may be split into more components, or two or more components or parts of components may be combined into a new component to achieve the purpose of the embodiments of the present invention.

[0036] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A novel dual-solenoid valve fully active suspension actuator, including a shock absorber, characterized in that: It also includes a recovery solenoid valve, a compression solenoid valve, and a hydraulic valve block; wherein, The hydraulic valve block is arranged at the bottom of the oil storage cylinder of the shock absorber, and has a compression oil passage connected upward to the lower chamber of the working cylinder and a recovery oil passage connected upward to the middle cylinder. The compression oil passage and the recovery oil passage are respectively provided with compression oil pipe joints and recovery oil pipe joints which can be connected to the two ends of the power pump. The oil inlet end of the restoration solenoid valve is connected to the upper chamber of the working cylinder through the connecting intermediate cylinder, and the oil outlet end is connected to the oil storage cylinder; the restoration solenoid valve is provided with a restoration check valve, the oil inlet end is connected to the oil storage cylinder, and the oil outlet end is connected to the upper chamber of the working cylinder through the connecting intermediate cylinder; The oil inlet end of the compression solenoid valve is connected to the compression oil passage, and the oil outlet end is connected to the oil storage cylinder; the compression solenoid valve is provided with a compression check valve, the oil inlet end is connected to the oil storage cylinder, and the oil outlet end is connected to the compression oil passage; The novel dual-solenoid valve fully active suspension actuator includes fully active mode, active ADS mode, and ADS mode. In the fully active mode, the oil in the upper chamber of the working cylinder flows through the middle cylinder into the recovery oil passage and then into the power pump. After being pressurized by the power pump, it flows through the compression oil passage into the lower chamber of the working cylinder, causing the piston rod to move upward. The oil in the lower chamber of the working cylinder flows through the compression oil passage into the power pump. After being pressurized by the power pump, it flows through the recovery oil passage into the middle cylinder and then into the upper chamber of the working cylinder, causing the piston rod to move downward. In the active ADS mode, when the piston rod moves upward, the oil in the upper chamber of the working cylinder flows through the middle cylinder into the restoring solenoid valve, then flows through the compression check valve into the compression oil passage and then flows into the lower chamber of the working cylinder. The power pump pressurizes the upper chamber of the working cylinder to increase the restoring damping or pressurizes the lower chamber of the working cylinder to reduce the restoring damping; when the piston rod moves downward, the oil in the lower chamber of the working cylinder flows through the compression oil passage and flows into the compression solenoid valve, then flows through the restoring check valve into the middle cylinder and then flows into the upper chamber of the working cylinder. The power pump pressurizes the lower chamber of the working cylinder to increase the compression damping or pressurizes the upper chamber of the working cylinder to reduce the compression damping; In ADS mode, the power pump is closed; when the piston rod moves upward, the oil in the upper chamber of the working cylinder flows into the restoring solenoid valve through the intermediate cylinder, and then flows into the compression oil channel through the compression check valve and then flows into the lower chamber of the working cylinder; when the piston rod moves downward, the oil in the lower chamber of the working cylinder flows into the compression solenoid valve through the compression oil channel, and then flows into the intermediate cylinder through the restoring check valve and then flows into the upper chamber of the working cylinder.

2. A novel dual solenoid valve fully active suspension actuator according to claim 1, characterized in that: It also includes an accumulator, which is connected to the oil storage cylinder; In the fully active mode, when the piston rod moves upward, the oil in the accumulator flows into the oil storage cylinder and then flows into the intermediate cylinder through the recovery check valve, and flows into the recovery oil channel together with the oil flowing into the intermediate cylinder from the upper chamber of the working cylinder; when the piston rod moves downward, part of the oil in the lower chamber of the working cylinder flows into the accumulator through the compression oil channel through the compression solenoid valve; In the active ADS mode and ADS mode, when the piston rod moves upward, the oil in the accumulator flows into the oil storage cylinder, flows into the compression oil channel through the compression check valve, and then flows into the lower chamber of the working cylinder; when the piston rod moves downward, part of the oil flows into the accumulator through the compression solenoid valve.

3. The novel dual solenoid valve fully active suspension actuator according to claim 1 is characterized in that: The power pump is transmission-connected to a generator, and the novel dual-solenoid valve fully active suspension actuator also includes an energy recovery mode. In the energy recovery mode, the power pump switches to a power generation mode; when the piston rod moves upward, the oil in the upper chamber of the working cylinder flows into the recovery oil channel through the intermediate cylinder and then into the power pump, and then flows into the compression oil channel through the power pump and then into the lower chamber of the working cylinder; when the piston rod moves downward, the oil in the lower chamber of the working cylinder flows into the power pump through the compression oil channel, and then flows into the recovery oil channel through the power pump and then flows into the upper chamber of the working cylinder through the guide chamber; the oil flowing through the power pump drives the power pump to rotate and then drives the generator to generate electricity.

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