Intelligent full-active vehicle suspension system adopting double electromagnetic valves for adjustment

Abstract

According to the technical scheme, the intelligent full-active vehicle suspension system adopting the double electromagnetic valves for adjustment is of a double-way electromagnetic valve adjusting and controlling structure and mainly comprises a shock absorber assembly, a hydraulic driving module, a compression electromagnetic valve, a recovery adjusting valve, a one-way valve and a flow adjusting and controlling safety assembly. The shock absorber assembly adopts a three-layer barrel design, an inner-layer working cylinder is divided by a piston to form an upper working lower cavity, a middle-layer transition cylinder and the working cylinder form a transition cavity communicated with the upper working cavity, and an outer-layer oil storage cylinder forms an oil storage cavity. The two adjusting valves are both installed on the oil storage cylinder, the recovery adjusting valve communicates with the transition cavity and the oil storage cavity, and the compression electromagnetic valve communicates with the working lower cavity and the oil storage cavity. A two-way oil way of the hydraulic driving module is connected with the transition cavity and the lower working cavity. The system has the functions of conventional damping and full-active control, and can adjust the motion state of the vehicle body in real time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent suspension systems for automobiles, and in particular to an intelligent full-active vehicle suspension system using double electromagnetic valve adjustment. BACKGROUND

[0002] The ride comfort and handling stability of an automobile depend largely on the design and performance of its suspension system. An ideal suspension system should have the ability to effectively suppress vibrations caused by complex road conditions, while also playing an important role in improving the handling stability of the automobile.

[0003] Current double electromagnetic valve regulated semi-active suspension systems generally establish a linear mapping relationship between the electromagnetic valve current and the throttle area, and establish an independent impedance regulation mechanism for the recovery throttle channel and the compression throttle channel. This technical solution has inherent technical defects, cannot provide active force, and cannot achieve adjustment of the vehicle body posture such as pitch and roll. Therefore, the present application proposes an intelligent full-active vehicle suspension system using double electromagnetic valve adjustment. SUMMARY

[0004] An important goal of the present application is to propose an intelligent full-active vehicle suspension system using double electromagnetic valve adjustment. This system improves the limitations of existing technology, where the automobile suspension uses double valve control to achieve damping adjustment, which can only achieve passive or semi-active damping adjustment mode, and cannot achieve full-active damping adjustment mode. Through the system of the present application, the technical problem of being unable to actively adjust the vehicle body posture in the prior art can be effectively solved, thereby improving the driving performance and handling stability of the automobile.

[0005] The technical solution of the present application is an intelligent full-active vehicle suspension system using double electromagnetic valve adjustment, which includes a shock absorber assembly and further includes: The hydraulic drive module, compression solenoid valve, reset solenoid valve, check valve, and flow control safety components one and two are included. The shock absorber assembly adopts a three-layer cylindrical design. The shock absorber assembly includes an inner working cylinder with a piston slidably mounted inside. The inner working cylinder is divided by the piston into an upper working chamber and a lower working chamber. A middle transition cylinder forms a transition chamber connected to the upper working chamber with the working cylinder. An outer oil reservoir forms an oil storage chamber. The compression solenoid valve and reset solenoid valve are both mounted on the oil reservoir, with the reset solenoid valve connecting the transition chamber and the oil storage chamber. A solenoid valve connects the lower working chamber and the oil storage chamber. The bidirectional oil circuit of the hydraulic drive module is connected to the transition chamber and the lower working chamber respectively. The flow control safety component one and the flow control safety component two are respectively provided with a first oil circuit and a second oil circuit. The first oil circuit and the second oil circuit can be realized by flexible high-pressure oil pipes or by direct connection by a rigid structure. When the flow rate in the oil circuit exceeds the preset value, the safety component closes to realize system overload protection. A bidirectional hydraulic pump is provided between the first oil circuit and the second oil circuit. The bidirectional hydraulic pump is equipped with an automatic detection and unblocking mechanism to prevent pipeline blockage.

[0006] Optionally, the automatic detection and unblocking mechanism includes connecting pipes fixedly installed at both ends of a bidirectional hydraulic pump. A mounting frame is slidably installed inside the connecting pipes. A through hole is opened on the mounting frame, and a filter screen is fixedly installed inside the through hole. A pressure sensor is fixedly installed on one side of the mounting frame. A fixing column is fixedly installed inside the connecting pipes. A stop block is fixedly installed on one side of the fixing column. A mounting bracket is fixedly installed on the connecting pipes. A cylinder is fixedly installed on the mounting bracket. A controller is installed inside the cylinder. The output end of the stop block is connected to the input end of the controller. The output end of the controller is connected to the starting end of the cylinder. A fixing plate is fixedly installed on the piston rod of the cylinder. A guide plate is fixedly installed at one end of the fixing plate. One side of the guide plate is arc-shaped. A cleaning ring is slidably installed inside the connecting pipes. A guide block is fixedly installed on one side of the cleaning ring. The guide block is slit-faceted. Multiple unblocking blocks arranged at equal intervals are fixedly installed on the other side of the guide block.

[0007] Optionally, in the oil circuit system between the oil outlet of the recovery solenoid valve and the oil outlet of the compression solenoid valve, an accumulator is provided to form a parallel oil circuit structure with the two oil outlets.

[0008] Optionally, the accumulator is fixedly connected to the oil storage cylinder through a positioning and installation structure, and the accumulator adopts an optional arrangement scheme, which can be configured in the internal storage space of the oil storage cylinder or the external installation space.

[0009] Optionally, when the accumulator is in the internal working condition of the cylinder, it adopts a flexible bladder-type pressure vessel structure, and the flexible bladder-type pressure vessel forms a dynamic pressure coupling relationship with the sealed cavity of the oil storage cylinder through an isolation interface.

[0010] Optionally, when the accumulator is in external cylinder connection mode, it is configured as a multi-modal pressure regulating device. The multi-modal pressure regulating device includes an independent pressure-bearing unit and an integrated flow channel network, and realizes pressure medium exchange with the sealed cavity of the oil storage cylinder through a dynamic pressure compensation mechanism.

[0011] Optionally, the hydraulic pump assembly and the shock absorber assembly adopt a modular independent drive architecture. Each actuator-pump co-operation unit contains a dedicated closed-loop hydraulic circuit. The hydraulic pump assembly forms a one-to-one topological connection with the corresponding shock absorber assembly through a pressure medium transmission channel. Each actuator-pump co-operation unit has independent pressure supply and independent motion control functions.

[0012] Optionally, a first spring is fixedly installed inside the connecting tube, and one end of the first spring is fixedly connected to the cleaning ring.

[0013] Optionally, a second spring is fixedly installed on one side of the mounting frame, and one end of the second spring is fixedly connected to the fixing post.

[0014] Optionally, a connecting rod is fixedly installed at one end of the fixing plate, and one end of the connecting rod is fixedly connected to the guide plate.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: This invention innovatively combines a semi-active shock absorber with dual independent control with a bidirectional hydraulic pump to construct a closed-loop hydraulic circuit. While achieving passive damping semi-active adjustment, it provides active force to adjust the vehicle's pitch, roll, and other postures in real time, significantly improving vehicle handling safety and ride comfort.

[0016] Furthermore, the filter screen on the mounting frame works in conjunction with the system. When the filter screen becomes clogged, the amount of oil passing through the holes in the filter screen decreases, increasing the pressure on the mounting frame. As the pressure continues to increase, the mounting frame moves, and the pressure sensor on one side of the mounting frame contacts the stop block. The pressure sensor transmits a signal to the cylinder, which then starts. The piston rod of the cylinder strikes the fixed plate, causing it to reciprocate vertically. The side of the guide plate continuously presses against the two tangential surfaces of the guide block, causing the cleaning ring to reciprocate horizontally. The unblocking block on the cleaning ring unblocks the filter screen, preventing blockages from causing a sudden increase in the hydraulic pump's inlet resistance and a sudden drop in the outlet flow, which could lead to cavitation within the pump and damage to the machine. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the intelligent fully active vehicle suspension system with dual solenoid valve adjustment according to the present invention.

[0018] Figure 2 Schematic diagram of a two-way hydraulic pump Figure 1 ; Figure 3 Schematic diagram of a two-way hydraulic pump Figure 2 ; Figure 4 Schematic diagram of the internal structure of the connecting pipe Figure 1 ; Figure 2 Schematic diagram of the internal structure of the connecting pipe Figure 6 ; Figure 5 for Figures 1-2 A magnified schematic diagram of the structure at point A in the middle.

[0019] Reference numerals: 1. Upper working chamber; 2. Lower working chamber; 3. Transition chamber; 4. Accumulator; 5. Compression solenoid valve; 6. Reset solenoid valve; 7. Flow control safety component one; 8. Flow control safety component two; 9. Bidirectional hydraulic pump; 10. First oil circuit; 11. Second oil circuit; 12. Piston; 13. Connecting pipe; 14. Mounting bracket; 15. Cylinder; 16. Fixing plate; 17. Connecting rod; 18. Guide plate; 19. Cleaning ring; 20. Unblocking block; 21. Mounting frame; 22. Guide block; 23. Filter screen; 24. Through hole; 25. Fixing column; 26. Stop block; 27. Second spring; 28. Pressure sensor; 29. ​​First spring. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0022] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Example 1 like Figure 4 As shown, this invention proposes an intelligent fully active vehicle suspension system with dual solenoid valve adjustment, including a shock absorber assembly, a hydraulic drive module, a compression solenoid valve 5, a return solenoid valve 6, a check valve, and flow control safety components 7 and 8. The shock absorber assembly adopts a three-layer cylinder design, including an inner working cylinder with a piston 12 slidably mounted inside. The inner working cylinder is divided by the piston 12 to form an upper working chamber 1 and a lower working chamber 2. The middle transition cylinder forms a transition chamber 3 communicating with the upper working chamber 1. The outer oil reservoir forms an oil reservoir. The compression solenoid valve 5 and the return solenoid valve 6 are both mounted on the oil reservoir. The original solenoid valve 6 connects the transition chamber 3 and the oil storage chamber, and the compression solenoid valve 5 connects the working lower chamber 2 and the oil storage chamber. The bidirectional oil circuit of the hydraulic drive module is connected to the transition chamber 3 and the working lower chamber 2 respectively. The flow control safety component 1 7 and the flow control safety component 2 8 are respectively provided with a first oil circuit 10 and a second oil circuit 11. The first oil circuit 10 and the second oil circuit 11 can be realized by flexible high-pressure oil pipes or by direct connection by rigid structure. When the flow in the oil circuit exceeds the preset value, the safety component closes to realize system overload protection. A bidirectional hydraulic pump 9 is provided between the first oil circuit 10 and the second oil circuit 11. The bidirectional hydraulic pump 9 is equipped with an automatic detection and unblocking mechanism to prevent pipeline blockage.

[0027] Example 2 like Figure 5 , Figure 6 and Figure 1As shown, the automatic detection and unblocking mechanism includes connecting pipes 13 fixedly installed at both ends of a bidirectional hydraulic pump 9. A mounting frame 21 is slidably installed inside the connecting pipes 13. A through hole 24 is provided on the mounting frame 21, and a filter screen 23 is fixedly installed inside the through hole 24. A pressure sensor 28 is fixedly installed on one side of the mounting frame 21. A fixing column 25 is fixedly installed inside the connecting pipes 13, and a stop block 26 is fixedly installed on one side of the fixing column 25. A mounting bracket 14 is fixedly installed on the connecting pipes 13, and a cylinder 15 is fixedly installed on the mounting bracket 14. A controller is installed inside the cylinder 15. The output end of the stop block 26 is connected to the input end of the controller, and the output end of the controller is connected to the starting end of the cylinder 15. A fixing plate 16 is fixedly installed on the piston rod of the cylinder 15. A guide plate 18 is fixedly installed on one end of the fixing plate 16, and one side of the guide plate 18 is arc-shaped. A cleaning ring 19 is slidably installed inside the connecting pipes 13, and a guide block 22 is fixedly installed on one side of the cleaning ring 19. The guide block 22 is slit-shaped, and multiple equidistant unblocking blocks 20 are fixedly installed on the other side of the guide block 22. When the filter screen 23 is clogged, the amount of oil passing through the through holes on the filter screen 23 decreases, increasing the pressure on the mounting frame 21. As the pressure increases, the mounting frame 21 moves, and the pressure sensor 28 on one side of the mounting frame 21 contacts the stop block 26. The pressure sensor 28 transmits the signal to the cylinder 15, which starts. The piston rod of the cylinder 15 drives the fixed plate 16 to reciprocate in the vertical direction. The fixed plate 16 drives the bottom guide plate 18 to move in the connecting pipe 13. The side of the guide plate 18 continuously squeezes the two slits of the guide block 22, causing the cleaning ring 19 to reciprocate in the horizontal direction. The unblocking blocks 20 on the cleaning ring 19 unblock the filter screen 23, preventing the blockage from causing a sudden increase in the oil inlet resistance and a sudden drop in the oil outlet flow of the hydraulic pump, which in turn causes "cavitation" in the pump and damages the machine.

[0028] Example 3 like Figure 3 , Figure 6 and ​As shown, in the oil circuit system between the oil outlet of the restoration solenoid valve 6 and the oil outlet of the compression solenoid valve 5, an accumulator 4 is provided to form a parallel oil circuit structure with the two oil outlets. The accumulator 4 is fixedly connected to the oil reservoir through a positioning and mounting structure. The accumulator 4 adopts an optional arrangement scheme and can be configured in the internal storage space or external installation space of the oil reservoir. When the accumulator 4 is in the internal working condition of the cylinder, it adopts a flexible bladder-type pressure vessel structure. The flexible bladder-type pressure vessel forms a dynamic pressure coupling relationship with the sealed cavity of the oil reservoir through an isolation interface. When the accumulator 4 is in the external working condition of the cylinder, it is configured as a multi-modal pressure regulating device. The multi-modal pressure regulating device includes an independent pressure-bearing unit and an integrated flow channel network. It achieves a dynamic pressure compensation mechanism with the oil reservoir. The pressure medium exchange in the sealed cavity is achieved through a modular independent drive architecture between the hydraulic pump assembly and the shock absorber assembly. Each actuator-pump unit has its own closed-loop hydraulic circuit. The hydraulic pump assembly forms a one-to-one topology connection with the corresponding shock absorber assembly through a pressure medium transmission channel. Each actuator-pump unit has independent pressure supply and independent motion control functions. A first spring 29 is fixedly installed inside the connecting pipe 13. One end of the first spring 29 is fixedly connected to the cleaning ring 19. A second spring 27 is fixedly installed on one side of the mounting frame 21. One end of the second spring 27 is fixedly connected to the fixed column 25. A connecting rod 17 is fixedly installed on one end of the fixed plate 16. One end of the connecting rod 17 is fixedly connected to the guide plate 18.

[0029] Example 4 a) Passive compression phase: As piston 12 moves downward, the oil in the lower working chamber 2 enters the compression solenoid valve 5, generating a damping force. After flowing out of the compression solenoid valve 5, a portion flows into the accumulator 4 for storage. At this time, the accumulator 4 is compressed, its volume decreases, and its pressure increases. Another portion of the oil enters the upper working chamber 1 through the check valve to replenish the oil and achieve pressure balance. b) Passive recovery phase: As piston 12 moves upward, oil in the upper working chamber 1 flows from the working cylinder into the transition chamber 3. After passing through the reset solenoid valve 6, it generates damping force and flows out of the reset solenoid valve 6 into the oil storage chamber. At this time, the accumulator 4 expands in volume and the pressure decreases. The oil is replenished to the lower working chamber 2 through the check valve to achieve pressure balance.

[0030] c) Active descent phase: Hydraulic oil enters the first oil circuit 10 from the bidirectional hydraulic pump 9. The piston 12 moves downward. Part of the oil discharged from the working lower chamber 2 returns to the bidirectional hydraulic pump 9 through the second oil circuit 11, and the other part enters the accumulator 4. At this time, the accumulator 4 is compressed, its volume decreases, and its pressure increases, reaching pressure balance.

[0031] d) Active lifting phase: Hydraulic oil enters the second oil circuit 11 from the bidirectional hydraulic pump 9, the piston 12 moves upward, and the oil discharged from the upper working chamber 1 returns to the bidirectional hydraulic pump 9 through the first oil circuit 10. At the same time, the accumulator 4 replenishes the oil in the lower working chamber 2 through the check valve to achieve pressure balance. e) Failure stage of the bidirectional hydraulic pump: When the flow rate in the oil circuit is within the specified range, the flow valve is in the open state, and the system operates normally and stably. When the flow rate of the bidirectional hydraulic pump 9 exceeds the preset value due to control or other reasons, the safety component automatically shuts down, realizing automatic identification of high-pressure oil pump fault mode, automatic physical isolation of faulty high-pressure oil pump, and protection of the suspension system safety function.

[0032] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An intelligent fully active vehicle suspension system employing dual solenoid valve adjustment, comprising a shock absorber assembly, characterized in that, Also includes: The hydraulic drive module, compression solenoid valve (5), recovery solenoid valve (6), check valve, flow control safety component one (7) and flow control safety component two (8) are included. The shock absorber assembly adopts a three-layer cylindrical design. The shock absorber assembly includes an inner working cylinder, in which a piston (12) is slidably installed. The inner working cylinder is divided by the piston (12) to form an upper working chamber (1) and a lower working chamber (2). The middle transition cylinder forms a transition chamber (3) that connects to the upper working chamber (1) with the working cylinder. The outer oil storage cylinder forms an oil storage chamber. The compression solenoid valve (5) and the recovery solenoid valve (6) are both installed on the oil storage cylinder. The recovery solenoid valve (6) connects the transition chamber (3) and the oil storage chamber. (5) Connect the working lower chamber (2) and the oil storage chamber. The bidirectional oil circuit of the hydraulic drive module is connected to the transition chamber (3) and the working lower chamber (2) respectively. The flow control safety component one (7) and the flow control safety component two (8) are respectively provided with a first oil circuit (10) and a second oil circuit (11). The first oil circuit (10) and the second oil circuit (11) can be realized by flexible high-pressure oil pipe or by direct connection by rigid structure. When the flow in the oil circuit exceeds the preset value, the safety component is closed to realize system overload protection. A bidirectional hydraulic pump (9) is provided between the first oil circuit (10) and the second oil circuit (11). The bidirectional hydraulic pump (9) is provided with an automatic detection and unblocking mechanism to prevent pipeline blockage.

2. The intelligent fully active vehicle suspension system using dual solenoid valve adjustment according to claim 1, characterized in that, The automatic detection and unblocking mechanism includes connecting pipes (13) fixedly installed at both ends of a bidirectional hydraulic pump (9). A mounting frame (21) is slidably installed inside the connecting pipes (13). A through hole (24) is opened on the mounting frame (21). A filter screen (23) is fixedly installed inside the through hole (24). A pressure sensor (28) is fixedly installed on one side of the mounting frame (21). A fixing column (25) is fixedly installed inside the connecting pipes (13). A stop block (26) is fixedly installed on one side of the fixing column (25). A mounting bracket (14) is fixedly installed on the connecting pipes (13). A cylinder (15) is fixedly installed on the mounting bracket (14). (15) is equipped with a controller. The output end of the stop block (26) is connected to the input end of the controller. The output end of the controller is connected to the starting end of the cylinder (15). The piston rod of the cylinder (15) is fixedly installed with a fixing plate (16). One end of the fixing plate (16) is fixedly installed with a guide plate (18). One side of the guide plate (18) is arc-shaped. A cleaning ring (19) is slidably installed in the connecting pipe (13). One side of the cleaning ring (19) is fixedly installed with a guide block (22). The guide block (22) is slit-faceted. The other side of the guide block (22) is fixedly installed with multiple equidistant unblocking blocks (20).

3. The intelligent fully active vehicle suspension system with dual solenoid valve adjustment according to claim 3, characterized in that, In the oil circuit system between the oil outlet of the recovery solenoid valve (6) and the oil outlet of the compression solenoid valve (5), an accumulator (4) is provided to form a parallel oil circuit structure with the two oil outlets.

4. The intelligent fully active vehicle suspension system using dual solenoid valve adjustment according to claim 3, characterized in that, The accumulator (4) is fixedly connected to the oil storage cylinder through a positioning and installation structure, and the accumulator (4) adopts an optional arrangement scheme, which can be configured in the internal storage space or the external installation space of the oil storage cylinder.

5. The intelligent fully active vehicle suspension system with dual solenoid valve adjustment according to claim 4, characterized in that, When the accumulator (4) is in the cylinder body internal working condition, it adopts a flexible bladder pressure vessel structure. The flexible bladder pressure vessel forms a dynamic pressure coupling relationship with the sealed cavity of the oil storage cylinder through the isolation interface.

6. The intelligent fully active vehicle suspension system with dual solenoid valve adjustment according to claim 1, characterized in that, When the accumulator (4) is in the external working condition of the cylinder, it is configured as a multi-mode pressure regulating device. The multi-mode pressure regulating device includes an independent pressure-bearing unit and an integrated flow channel network. It realizes the exchange of pressure medium with the sealed cavity of the oil storage cylinder through a dynamic pressure compensation mechanism.

7. The intelligent fully active vehicle suspension system using dual solenoid valve adjustment according to claim 1, characterized in that, The hydraulic pump assembly and the shock absorber assembly adopt a modular independent drive architecture. Each actuator-pump unit has a dedicated closed-loop hydraulic circuit. The hydraulic pump assembly forms a one-to-one topological connection with the corresponding shock absorber assembly through a pressure medium transmission channel. Each actuator-pump unit has independent pressure supply and independent motion control functions.

8. The intelligent fully active vehicle suspension system with dual solenoid valve adjustment according to claim 2, characterized in that, A first spring (29) is fixedly installed inside the connecting tube (13), and one end of the first spring (29) is fixedly connected to the cleaning ring (19).

9. The intelligent fully active vehicle suspension system with dual solenoid valve adjustment according to claim 2, characterized in that, A second spring (27) is fixedly installed on one side of the mounting frame (21), and one end of the second spring (27) is fixedly connected to the fixing post (25).

10. The intelligent fully active vehicle suspension system with dual solenoid valve adjustment according to claim 2, characterized in that, A connecting rod (17) is fixedly installed at one end of the fixing plate (16), and one end of the connecting rod (17) is fixedly connected to the guide plate (18).

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