Vehicle oil-gas interconnection suspension system, hydraulic control device and vehicle

Abstract

The invention discloses a vehicle oil-gas interconnection suspension system, a hydraulic control device and a vehicle, the vehicle oil-gas interconnection suspension system comprises a left suspension hydraulic cylinder and a right suspension hydraulic cylinder, each of the left suspension hydraulic cylinder and the right suspension hydraulic cylinder is provided with a piston rod and a cylinder body, one end of each piston rod is used for being connected with a frame, and each cylinder body is connected with an axle; the first left energy accumulator and the second left energy accumulator are respectively connected with the first chamber and the second chamber of the left suspension hydraulic cylinder; the first right energy accumulator and the second right energy accumulator are respectively connected with the first chamber and the second chamber of the right suspension hydraulic cylinder; the three-position four-way valve is connected to the left suspension hydraulic cylinder and the right suspension hydraulic cylinder; the three-position four-way valve comprises a valve body and a valve core; a first upper oil guide groove, a second upper oil guide groove, a first middle oil guide groove, a second middle oil guide groove and a lower oil guide groove are formed in the side face of the valve element, and a through hole is formed in the lower end of the valve element. Reverse rotation of an oil way at any time is achieved, the function of not distinguishing oil ports is achieved, and the function of a product is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly relates to a vehicle oil-gas interconnected suspension system, a hydraulic control device and a vehicle. Background Art

[0002] The vehicle suspension system is the general term for all components connecting the vehicle body and the wheels. Its main functions are to buffer and absorb the body vibrations caused by road unevenness, and to transmit the driving force and braking force between the wheels and the road surface. The vehicle oil-gas interconnected suspension system usually involves mode switching, that is, the switching of the oil flow direction. Currently, there is a lack of a mode of interconnected switching independent suspension in the oil-gas interconnected suspension mode, and the lack of this mode limits the vibration reduction performance of the suspension when the road unevenness is large.

[0003] The structure of the traditional three-position four-way valve distinguishes the oil supply port, the oil return port and the working oil port, making it difficult to reverse the oil circuit and difficult to meet the requirements of the oil circuit control of the vehicle oil-gas interconnected suspension. The current main configurations of the neutral position of the traditional three-position four-way valve are closed neutral position, full-pass neutral position, pressure-pass neutral position and floating neutral position, lacking the A-B, T-P return configurations. As a result, the ideal oil circuit connection mode cannot be achieved under certain working conditions, affecting the overall performance of the system. In addition, the system structure in the prior art is complex, and multiple valve parts need to work together to achieve different connection modes, increasing the complexity and failure rate of the system, and also increasing the manufacturing and maintenance costs.

[0004] Under this background, it is of great significance to design a vehicle oil-gas interconnected suspension system and a hydraulic control device applicable to the distribution and switching of complex oil circuits in hydraulic systems and pneumatic systems, especially in scenarios where a vehicle needs to switch fluid flows in multiple working conditions and multiple directions. Summary of the Invention

[0005] Aiming at the above defects or improvement requirements of the prior art, the present invention provides a vehicle oil-gas interconnected suspension system, a hydraulic control device and a vehicle, which can reverse the oil circuit at any time, realize the function of not distinguishing the oil port functions, and strengthen the functions of the product.

[0006] To achieve the above object, the present invention adopts the following technical solutions.

[0007] In some embodiments, a vehicle oil-gas interconnected suspension system is provided, and the vehicle oil-gas interconnected suspension system includes:

[0008] A left suspension hydraulic cylinder and a right suspension hydraulic cylinder, both having a piston rod and a cylinder body. One end of the piston rod is used to connect to the vehicle frame, and the cylinder body is connected to the axle;

[0009] A first left accumulator and a second left accumulator, respectively connected to the first chamber and the second chamber of the left suspension hydraulic cylinder;

[0010] The first right accumulator and the second right accumulator are respectively connected to the first chamber and the second chamber of the right suspension hydraulic cylinder;

[0011] A three-position four-way valve is connected to the left suspension hydraulic cylinder and the right suspension hydraulic cylinder;

[0012] The three-position four-way valve includes a valve body and a spool;

[0013] A first oil port, a second oil port, a third oil port, and a fourth oil port are radially penetrated through the middle of the valve body;

[0014] On the side of the spool, a first upper oil guiding groove, a second upper oil guiding groove, a first middle oil guiding groove, a second middle oil guiding groove, and a lower oil guiding groove are provided, and a through hole is provided at the lower end of the spool.

[0015] In some embodiments, a positioning guide rail is provided on the surface of the spool, and a guiding groove matching with the positioning guide rail is provided on the inner wall of the valve body.

[0016] In some embodiments, the three-position four-way valve includes a first return spring, a first connecting rod, a second return spring, a second connecting rod, a first electromagnet, and a second electromagnet;

[0017] The first return spring and the first electromagnet are connected to the first connecting rod;

[0018] The second return spring and the second electromagnet are connected to the second connecting rod;

[0019] The first connecting rod and the second connecting rod are respectively connected to both ends of the spool by threads.

[0020] In some embodiments, the three-position four-way valve includes an oil pipe, and the oil pipe communicates with the first oil chamber and the second oil chamber of the valve body.

[0021] In some embodiments, the three-position four-way valve includes a first valve body cover and a second valve body cover;

[0022] The first valve body cover and the second valve body cover are respectively connected to both ends of the valve body by bolts for closing the valve body.

[0023] In some embodiments, a boss is provided in the middle section of the valve body, which is in clearance fit with the spool, and the guiding groove is provided on the boss and is in clearance fit with the positioning guide rail on the spool.

[0024] In some embodiments, the first upper oil guiding groove and the second upper oil guiding groove are oppositely arranged. When the second electromagnet is energized and the first electromagnet is de-energized, the first oil port and the second oil port are both communicated with the first upper oil guiding groove, the third oil port and the fourth oil port are both communicated with the second upper oil guiding groove, and the three-position four-way valve works in the neutral position;

[0025] When the first electromagnet is energized and the second electromagnet is de-energized, the first oil port and the third oil port are both connected to the through hole, the second oil port and the fourth oil port are both connected to the lower oil guiding groove, and the three-way four-way valve works in the left position;

[0026] When both the first electromagnet and the second electromagnet are de-energized, the first oil port and the fourth oil port are both connected to the first middle oil guiding groove, the second oil port and the third oil port are both connected to the second middle oil guiding groove, and the three-way four-way valve works in the right position.

[0027] In some embodiments, the second middle oil guiding groove is connected to the lower oil guiding groove;

[0028] The lower oil guiding groove and the second middle oil guiding groove form a "concave" shaped structure on one side surface of the valve core. One end of the through hole is arranged in the middle of the "concave" shaped structure, aligned with one side position of the second upper oil guiding groove and one side position of the second middle oil guiding groove. The other end of the through hole is aligned with one side position of the first upper oil guiding groove and one side position of the first middle oil guiding groove in the circumferential direction of the valve core.

[0029] In some embodiments, a hydraulic control device for a vehicle oil-gas interconnected suspension system is further provided. The hydraulic control device includes:

[0030] A three-way four-way valve connected to the left suspension hydraulic cylinder and the right suspension hydraulic cylinder of the vehicle oil-gas interconnected suspension system;

[0031] The three-way four-way valve includes a valve body and a valve core;

[0032] A first oil port, a second oil port, a third oil port, and a fourth oil port are radially penetrated through the middle of the valve body;

[0033] A first upper oil guiding groove, a second upper oil guiding groove, a first middle oil guiding groove, a second middle oil guiding groove, and a lower oil guiding groove are arranged on the side surface of the valve core, and a through hole is provided at the lower end of the valve core;

[0034] When the second electromagnet is energized and the first electromagnet is de-energized, the first oil port and the second oil port are both connected to the first upper oil guiding groove, the third oil port and the fourth oil port are both connected to the second upper oil guiding groove, and the three-way four-way valve works in the middle position;

[0035] When the first electromagnet is energized and the second electromagnet is de-energized, the first oil port and the third oil port are both connected to the through hole, the second oil port and the fourth oil port are both connected to the lower oil guiding groove, and the three-way four-way valve works in the left position;

[0036] When both the first electromagnet and the second electromagnet are de-energized, the first oil port and the fourth oil port are both connected to the first middle oil guiding groove, the second oil port and the third oil port are both connected to the second middle oil guiding groove, and the three-way four-way valve works in the right position.

[0037] In some embodiments, a vehicle is further provided, and the vehicle includes the oil-gas interconnected suspension system described in any of the foregoing embodiments.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides an oil-gas interconnected suspension system for a vehicle, a hydraulic control device and a vehicle. By using a cylindrical inner core type reversible three-position four-way valve product controlled by an electromagnet to replace the traditional three-position four-way valve, the oil circuit can be reversed at any time, the function of the oil ports is not distinguished, and the currently lacking A-B and T-P neutral configurations are realized. Through the settings such as a pressure balance oil pipe and a return spring, the structure is optimized and the function of the product is strengthened. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the overall process of the oil-gas interconnected suspension system of a vehicle according to an embodiment of the present invention.

[0040] Figure 2 It is an exploded view of the structure of the three-position four-way valve in some embodiments of the present invention.

[0041] Figure 3 It is an overall schematic diagram of the valve body in some embodiments of the present invention.

[0042] Figure 4 It is a front sectional view of the valve body in some embodiments of the present invention.

[0043] Figure 5 For Figure 4 the sectional view taken along the A-A direction of the valve body in

[0044] Figure 6 It is a schematic diagram of the spool in some embodiments of the present invention.

[0045] Figure 7 It is another schematic diagram of the spool in some embodiments of the present invention.

[0046] Figure 8 It is a side expanded view of the spool in some embodiments of the present invention.

[0047] Figure 9 It is a schematic diagram of the connecting rod in some embodiments of the present invention.

[0048] Figure 10 It is a schematic diagram of the valve body cover in some embodiments of the present invention.

[0049] Figure 11 It is a schematic diagram of the oil circuit of the three-position four-way valve in some embodiments of the present invention.

[0050] Figure 12 It is a view of the rendered structure of the spool in some embodiments of the present invention.

[0051] Figure 13Another view of the rendering structure of the spool valve in some embodiments of the present invention.

[0052] Figure 14 Schematic diagram of the overall structure of a one-way variable damping valve according to an embodiment of the present invention.

[0053] Figure 15 Schematic sectional view of the overall structure of a one-way variable damping valve according to an embodiment of the present invention.

[0054] Figure 16 Schematic diagram of the principle of a working state of a one-way variable damping valve according to an embodiment of the present invention.

[0055] Figure 17 Schematic diagram of the principle of another working state of a one-way variable damping valve according to an embodiment of the present invention.

[0056] Explanation of some reference numerals: 100 - left suspension hydraulic cylinder; 200 - right suspension hydraulic cylinder; 300 - first left accumulator; 400 - second left accumulator; 500 - first right accumulator; 600 - second right accumulator; 700 - three-position four-way valve; 800 - one-way variable damping valve; 1 - valve body; 2 - spool valve; 3 - first return spring; 4 - first connecting rod; 5 - first valve body cover; 6 - second return spring; 7 - second connecting rod; 8 - second valve body cover; 9 - oil pipe; 10 - first housing; 11 - first electromagnet; 12 - second housing; 13 - second electromagnet. Detailed implementation manners

[0057] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0058] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0059] It should be noted that all directional indications (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture shown in the corresponding figure. If the specific posture changes, the directional indication will also change accordingly.

[0060] Figure 1 FIG. 4 is a schematic diagram of the overall structure of a vehicle oil-gas interconnected suspension system according to an embodiment of the present invention.

[0061] Referring to Figure 1 , in some embodiments, a vehicle oil-gas interconnected suspension system is provided. The vehicle oil-gas interconnected suspension system includes: a left suspension hydraulic cylinder 100 and a right suspension hydraulic cylinder 200, a first left accumulator 300 and a second left accumulator 400, a first right accumulator 500 and a second right accumulator 600, and a hydraulic control device.

[0062] Both the left suspension hydraulic cylinder 100 and the right suspension hydraulic cylinder 200 have a piston rod and a cylinder block. One end of the piston rod is used to connect to a vehicle frame (not shown), and the cylinder block is connected to an axle (not shown). A first chamber 1001 and a second chamber 1002 of the left suspension hydraulic cylinder are formed inside the left suspension hydraulic cylinder, and a first chamber 2001 and a second chamber 2002 of the right suspension hydraulic cylinder are similarly formed inside the right suspension hydraulic cylinder.

[0063] The first left accumulator 300 and the second left accumulator 400 are respectively connected to the first chamber and the second chamber of the left suspension hydraulic cylinder. The first right accumulator 500 and the second right accumulator 600 are respectively connected to the first chamber and the second chamber of the right suspension hydraulic cylinder. That is, the first left accumulator is connected to the first chamber of the left suspension hydraulic cylinder, the second left accumulator is connected to the second chamber of the left suspension hydraulic cylinder. The first right accumulator is connected to the first chamber of the right suspension hydraulic cylinder, and the second right accumulator is connected to the second chamber of the right suspension hydraulic cylinder.

[0064] The hydraulic control device is connected to the left suspension hydraulic cylinder and the right suspension hydraulic cylinder. The hydraulic control device is used to control the flow of hydraulic oil between the left suspension hydraulic cylinder and the right suspension hydraulic cylinder.

[0065] In some embodiments, the hydraulic control device includes a three-way four-way valve 700.

[0066] Figure 2 FIG. 5 is an exploded view of the structure of a three-way four-way valve in some embodiments of the present invention. Referring to Figure 2 , in some embodiments, the three-way four-way valve 700 includes a valve body 1 and a spool 2.

[0067] Figure 3 FIG. 6 is an overall schematic diagram of the valve body in some embodiments of the present invention. Figure 4 FIG. 7 is a front sectional view of the valve body in some embodiments of the present invention.Figure 5 is Figure 4 the sectional view of the middle valve body in the A-A direction. Refer to Figures 3 - 5 , in some embodiments, a first oil port 103, a second oil port 104, a third oil port 105, and a fourth oil port 106 are radially penetrated through the middle of the valve body 1, corresponding to Figure 1 the A, B, T, and P ports in

[0068] Figure 6 the schematic diagram of the spool in some embodiments of the present invention, Figure 7 another schematic diagram of the spool in some embodiments of the present invention, Figure 8 the side unfolded view of the spool in some embodiments of the present invention.

[0069] Figure 11 the oil circuit schematic diagram of the three-position four-way valve in some embodiments of the present invention. Figure 11 shows the oil circuit connection modes in the left position, middle position, and right position of the three-position four-way valve.

[0070] Refer to Figures 6 - 8 , Figure 1 , Figures 11 - 13, in some embodiments, the spool valve 2 is integrally a cylindrical inner core, and a plurality of oil guiding channels are arranged on the side surface. The plurality of oil guiding channels include upper oil guiding channels P201F1 - P202F1, P203F1 - P204F1, middle oil guiding channels P201F2 - P204F2, P203F2 - P202F2, and lower oil guiding channels P204F3 - P203F3, P202F3 - P201F3. The upper oil guiding channels, middle oil guiding channels, and lower oil guiding channels are respectively connected to the oil circuits to form different working states. The upper oil guiding channels P201F1 - P202F1, P203F1 - P204F1 are used for the neutral position connection and support the A - B and P - T configurations through a specific oil circuit design. The middle oil guiding channels P201F2 - P204F2, P203F2 - P202F2 are used for the right position connection, and when switched to this state, fluid flows in a specific direction. The lower oil guiding channels P204F3 - P203F3, P202F3 - P201F3 are used for the left position connection, meeting the requirements of reverse oil circuit switching and achieving rapid fluid switching.

[0071] The upper oil guiding channels correspond to the neutral position of the three - position four - way valve. In the neutral position state, port A and port B are interconnected, and port T and port P are also interconnected, but there is no connection between port A, port B and port T, port P. In this state, the first chamber and the second chamber of the left suspension hydraulic cylinder are interconnected, and the first chamber and the second chamber of the right suspension hydraulic cylinder are also interconnected, but there is no connection between the left and right suspension hydraulic cylinders.

[0072] The middle oil guiding channels correspond to the right position of the three - position four - way valve ( Figure 11 the right position in Figure 1 is the upper position in ). In the right position state, port A and port P are interconnected, and port B and port T are interconnected. In this state, the first chamber of the left suspension hydraulic cylinder is connected to the first chamber of the right suspension hydraulic cylinder, and the second chamber of the left suspension hydraulic cylinder is connected to the second chamber of the right suspension hydraulic cylinder.

[0073] The lower oil guiding channels correspond to the left position of the three - position four - way valve ( Figure 11 the left position in Figure 1 is the lower position in ). In the left position state, port A and port T are interconnected, and port B and port P are interconnected. In this state, the first chamber of the left suspension hydraulic cylinder is connected to the second chamber of the right suspension hydraulic cylinder, and the second chamber of the left suspension hydraulic cylinder is connected to the first chamber of the right suspension hydraulic cylinder.

[0074] In some embodiments, the upper oil guiding channel includes a first upper oil guiding groove 204 and a second upper oil guiding groove 205. The middle oil guiding channel includes a first middle oil guiding groove 206 and a second middle oil guiding groove 207. The lower oil guiding channel includes a lower oil guiding groove 208 and a through hole 209. A through hole 209 is provided at the lower end of the valve core. The first upper oil guiding groove and the second upper oil guiding groove are oppositely arranged at the upper part of the valve core, the first middle oil guiding groove and the second middle oil guiding groove are arranged at the middle part of the valve core, and the lower oil guiding groove is arranged at the lower part of the valve core. The through hole penetrates through the lower part of the valve core and is used to communicate different oil ports.

[0075] In some embodiments, the first upper oil guiding groove 204 and the second upper oil guiding groove 205 are oppositely arranged and have the same height in the axial direction of the valve core. Both the first upper oil guiding groove 204 and the second upper oil guiding groove 205 are waist-shaped, and both the first upper oil guiding groove 204 and the second upper oil guiding groove 205 are non-through holes. In the neutral position, the positions P201F1 and P202F1 on both sides of the first upper oil guiding groove 204 correspond to port A and port B respectively, and the positions P203F1 and P204F1 on both sides of the second upper oil guiding groove 205 correspond to port T and port P respectively.

[0076] The first middle oil guiding groove 206 and the second middle oil guiding groove 207 are oppositely arranged and have the same height in the axial direction of the valve core. The first middle oil guiding groove 206 is waist-shaped, and the first middle oil guiding groove 206 and the second middle oil guiding groove 207 are arranged offset from the first upper oil guiding groove 204 and the second upper oil guiding groove 205 in the circumferential direction of the valve core. In the right position, the positions P201F2 and P204F2 on both sides of the first middle oil guiding groove 206 correspond to port A and port P respectively, and the positions P202F2 and P203F2 on both sides of the second upper oil guiding groove 205 correspond to port B and port T respectively.

[0077] In some embodiments, the second middle oil guiding groove 207 is communicated with the lower oil guiding groove 208. The lower oil guiding groove 208 is arranged on both sides of the second middle oil guiding groove 207, and neither the lower oil guiding groove 208 nor the second middle oil guiding groove 207 penetrates through the valve core for communication. In the left position, the positions P202F3 and P204F3 on both sides of the lower oil guiding groove 208 correspond to port B and port P respectively.

[0078] The oil path corresponding to the through hole 209 of the valve core 2 is P201F3 - P203F3, which is a directly drilled oil path. The two end positions P201F3 and P203F3 of the through hole 209 correspond to port A and port T respectively. The lower oil guiding groove 208 and the second middle oil guiding groove 207 form a "concave" - shaped structure on one side surface of the valve core. One end P203F3 of the through hole 209 is arranged in the middle of the "concave" - shaped structure and is aligned with the position P203F1 on one side of the second upper oil guiding groove 205 and the position P203F2 on one side of the second middle oil guiding groove 207. The other end P201F3 of the through hole 209 is aligned with the position P201F1 on one side of the first upper oil guiding groove 204 and the position P201F2 on one side of the first middle oil guiding groove 206 in the circumferential direction of the valve core.

[0079] In the embodiments of the present application, the lower oil guiding groove 208 penetrates through the valve core and communicates with the second middle oil guiding groove 207, avoiding the direct connection oil path corresponding to the through hole 209, borrowing the oil path corresponding to the second middle oil guiding groove, providing a hydraulic oil circulation path through this structure, cleverly utilizing the limited valve core space, and realizing reliable switching of the oil path.

[0080] Reference Figure 5 and Figure 6 , in some embodiments, a positioning guide rail 201 is provided on the surface of the valve core 2, and a guiding groove 102 matching with the positioning guide rail 201 is arranged on the inner wall of the valve body 1. The cooperation of the positioning guide rail and the guiding groove can ensure the correct position of the valve core in the valve body, limit the degree of freedom of the valve core in the valve body, prevent the valve core from rotating during the working process, ensure smooth and precise movement, and ensure the correct corresponding relationship between each oil guiding groove and the oil port.

[0081] Reference Figure 4 , in some embodiments, a boss 101 is provided in the middle section of the valve body 1, which is in clearance fit with the valve core 2, and the guiding groove 102 is arranged on the boss 101 and is in clearance fit with the positioning guide rail 201 on the valve core 2. The machining accuracy of the boss is relatively high, and the boss inside the valve body 1 is in clearance fit with the valve core 2, improving the stability and accuracy of the valve core movement. In some embodiments, the length H of the boss along the axial direction of the valve body is greater than the sum of the distance W of the outermost edges of all the oil guiding channels along the axial direction of the valve core, the length L1 of the leftward movement and the length L2 of the rightward movement during the switching process of the valve core. Such a setting can effectively prevent hydraulic oil leakage.

[0082] Figure 9 Schematic diagram of the connecting rod in some embodiments of the present invention. Reference Figure 2 and Figure 9 , in some embodiments, the three-position four-way valve includes a first return spring 3, a first connecting rod 4, a second return spring 6, a second connecting rod 7, a first electromagnet 11, and a second electromagnet 13.

[0083] The first return spring 3 and the first electromagnet 11 are connected to the first connecting rod 4.

[0084] The second return spring 6 and the second electromagnet 13 are connected to the second connecting rod 7.

[0085] The first connecting rod 4 and the second connecting rod 7 are respectively connected to both ends of the valve core 2 by threads.

[0086] Specifically, positioning grooves 202 are provided at both ends of the valve core for fixing the first return spring 3 and the second return spring 6. Threaded grooves 203 are also provided at the centers of both ends of the valve core for connecting with the first connecting rod 4 and the second connecting rod 7.

[0087] In the embodiments of the present application, by controlling the on-off states of the first electromagnet and the second electromagnet, the valve core can be pushed to move within the valve body, thereby changing the communication relationship between the oil ports and the oil guiding grooves, and realizing different working states.

[0088] In some embodiments, the three-position four-way valve includes an oil pipe 9, and the oil pipe 9 communicates with the first oil chamber and the second oil chamber of the valve body 1. The first oil chamber and the second oil chamber are respectively located at both ends of the valve body, and are used to accommodate hydraulic oil and provide space for the movement of the valve core. The valve body is respectively provided with a first oil pipe connection hole 107 and a second oil pipe connection hole 108 corresponding to the first oil chamber and the second oil chamber, and the oil pipe 9 communicates with the first oil chamber and the second oil chamber of the valve body 1 through the first oil pipe connection hole 107 and the second oil pipe connection hole 108. The setting of the oil pipe can reduce the damping when the valve core 2 moves inside the valve body 1, balance the pressures of the two oil chambers, and ensure the normal movement of the valve core. The pressure balance design in the embodiments of the present application not only improves the movement efficiency of the valve core, but also reduces the mechanical wear problem caused by the movement being blocked.

[0089] Figure 10 It is a schematic diagram of the valve body cover in some embodiments of the present invention. In some embodiments, the three-position four-way valve includes a first valve body cover 5 and a second valve body cover 8.

[0090] The first valve body cover 5 and the second valve body cover 8 are respectively connected to both ends of the valve body 1 by bolts, and are used to close the valve body 1. The sealing performance of the first valve body cover and the second valve body cover directly affects the working reliability of the three-position four-way valve.

[0091] In some embodiments, the first connecting rod 4 and the second connecting rod 7 are connected to the valve core 2 through threads 401, and first return springs 3 and second return springs 6 are respectively arranged outside the first connecting rod 4 and the second connecting rod 7. One ends of the first return spring 3 and the second return spring 6 are fixed in the valve core positioning groove 202, and the other ends are respectively connected to the first valve body cover 5 and the second valve body cover 8.

[0092] In the power-off state, the elastic actions of the first return spring and the second return spring can make the valve core automatically return to the middle position. The first valve body cover and the second valve body cover are provided with guide grooves 501, which cooperate with the first connecting rod and the second connecting rod respectively, and are used to limit the deviation of the movement of the first connecting rod and the second connecting rod.

[0093] The first electromagnet and the second electromagnet are respectively arranged at both ends of the valve body, and are respectively connected to the distal ends of the first connecting rod and the second connecting rod. When the first electromagnet or the second electromagnet is energized, the magnetic field attracts the first connecting rod or the second connecting rod to drive the valve core to move, thereby realizing the state switching of the three-position four-way valve.

[0094] In an embodiment of the present invention, two valve body covers are provided at both ends of the valve body. The valve body covers are connected to the valve body through bolts 14, 15 and bolt holes 502 to enclose the valve body, which is convenient for assembly. A spring guide groove is also designed inside the valve body cover to ensure the stability of the return spring during movement.

[0095] In an embodiment of the present invention, internal threads 203 are provided at both ends of the spool and are connected to the threads 401 of the connecting rod. A limiting shaft section 402 is provided at the end of the connecting rod away from the spool. An electromagnet is arranged between the limiting shaft section and the valve body cover. When the electromagnet is energized, a magnetic field is generated to attract the limiting shaft section. Under its action, the connecting rod drives the spool 2 to move, thereby realizing the state switching of the three-position four-way valve. This structure is symmetrically arranged on both sides of the spool 2. When the first electromagnet 11 is energized and the second electromagnet 13 is de-energized, the state of the three-position four-way valve is switched to the left position. When the second electromagnet 13 is energized and the first electromagnet 11 is de-energized, the three-position four-way valve is switched to the middle position. The three-position four-way valve returns to the right position state when both the first electromagnet 11 and the second electromagnet 13 are de-energized. Specifically, a return spring positioning groove 202 is provided at both ends of the spool 2, and a spring positioning groove is provided on one side of the valve body inside the valve body cover. Two identical return springs are symmetrically arranged on both sides of the spool to achieve the purpose of power-off reset.

[0096] Specifically, the first upper oil guide groove 204 and the second upper oil guide groove 205 are arranged oppositely. When the second electromagnet 13 is energized and the first electromagnet 11 is de-energized, the first oil port 103 and the second oil port 104 are both connected to the first upper oil guide groove 204, and the third oil port 105 and the fourth oil port 106 are both connected to the second upper oil guide groove 205, and the three-position four-way valve operates in the middle position. In this state, the first chamber and the second chamber of the left suspension hydraulic cylinder communicate with each other, and the first chamber and the second chamber of the right suspension hydraulic cylinder also communicate with each other, but the left and right suspension hydraulic cylinders do not communicate with each other.

[0097] When the first electromagnet 11 is energized and the second electromagnet 13 is de-energized, the first oil port 103 and the third oil port 105 are both connected to the through hole 209, and the second oil port 104 and the fourth oil port 106 are both connected to the lower oil guide groove 208, and the three-position four-way valve operates in the left position. In this state, the first chamber of the left suspension hydraulic cylinder communicates with the second chamber of the right suspension hydraulic cylinder, and the second chamber of the left suspension hydraulic cylinder communicates with the first chamber of the right suspension hydraulic cylinder.

[0098] When both the first electromagnet 11 and the second electromagnet 13 are de-energized, the first oil port 103 and the fourth oil port 106 are both connected to the first middle oil guiding groove 206, the second oil port 104 and the third oil port 105 are both connected to the second middle oil guiding groove 207, and the three-way four-way valve works in the right position. In this state, the first chamber of the left suspension hydraulic cylinder is connected to the first chamber of the right suspension hydraulic cylinder, and the second chamber of the left suspension hydraulic cylinder is connected to the second chamber of the right suspension hydraulic cylinder.

[0099] During vehicle driving, according to the road surface conditions and vehicle state, by controlling the energization and de-energization states of the first electromagnet and the second electromagnet, the three-way four-way valve can be made to work in different positions, thereby changing the connection relationship between the left and right suspension hydraulic cylinders and realizing different suspension working modes, such as comfort mode, sports mode, and off-road mode, etc., to improve the vehicle's handling performance and riding comfort.

[0100] In some embodiments, a hydraulic control device for a vehicle oil-gas interconnected suspension system is further provided. The hydraulic control device includes: a three-way four-way valve, and the three-way four-way valve is connected to the left suspension hydraulic cylinder and the right suspension hydraulic cylinder of the vehicle oil-gas interconnected suspension system. The three-way four-way valve can be the three-way four-way valve in any of the above embodiments.

[0101] In some embodiments, the three-way four-way valve includes a valve body 1 and a valve core 2.

[0102] A first oil port 103, a second oil port 104, a third oil port 105, and a fourth oil port 106 are radially penetrated through the middle of the valve body 1.

[0103] A first upper oil guiding groove 204, a second upper oil guiding groove 205, a first middle oil guiding groove 206, a second middle oil guiding groove 207, and a lower oil guiding groove 208 are arranged on the side of the valve core 2, and a through hole 209 is provided at the lower end of the valve core 2.

[0104] When the second electromagnet 13 is energized and the first electromagnet 11 is de-energized, the first oil port 103 and the second oil port 104 are both connected to the first upper oil guiding groove 204, the third oil port 105 and the fourth oil port 106 are both connected to the second upper oil guiding groove 205, and the three-way four-way valve works in the middle position. In this state, the first chamber and the second chamber of the left suspension hydraulic cylinder are connected to each other, and the first chamber and the second chamber of the right suspension hydraulic cylinder are also connected to each other, but the left and right suspension hydraulic cylinders are not connected.

[0105] When the first electromagnet 11 is energized and the second electromagnet 13 is de-energized, the first oil port 103 and the third oil port 105 are both in communication with the through hole 209, the second oil port 104 and the fourth oil port 106 are both in communication with the lower oil guiding groove 208, and the three-position four-way valve operates in the left position. In this state, the first chamber of the left suspension hydraulic cylinder is in communication with the second chamber of the right suspension hydraulic cylinder, and the second chamber of the left suspension hydraulic cylinder is in communication with the first chamber of the right suspension hydraulic cylinder.

[0106] When both the first electromagnet 11 and the second electromagnet 13 are de-energized, the first oil port 103 and the fourth oil port 106 are both in communication with the first middle oil guiding groove 206, the second oil port 104 and the third oil port 105 are both in communication with the second middle oil guiding groove 207, and the three-position four-way valve operates in the right position. In this state, the first chamber of the left suspension hydraulic cylinder is in communication with the first chamber of the right suspension hydraulic cylinder, and the second chamber of the left suspension hydraulic cylinder is in communication with the second chamber of the right suspension hydraulic cylinder.

[0107] In the embodiments of the present application, the hydraulic control device can achieve different communication relationships between the left and right suspension hydraulic cylinders by controlling the working position of the three-position four-way valve, thereby adjusting the working state of the vehicle suspension system to adapt to different road conditions and driving requirements.

[0108] In some embodiments, a vehicle is further provided, and the vehicle includes the oil-gas interconnected suspension system according to any one of the above embodiments. The vehicle can be various types of vehicles such as a sedan, an SUV, an off-road vehicle, or a commercial vehicle. The vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a fuel vehicle. Of course, with the development and industrial maturity of new energy vehicles, the vehicle can be applicable to new energy vehicles. New energy vehicles include electric vehicles, hydrogen fuel vehicles, etc.

[0109] The oil-gas interconnected suspension system is installed on the chassis of the vehicle, and the left suspension hydraulic cylinder and the right suspension hydraulic cylinder are respectively installed on the left and right sides of the vehicle. The piston rods of the left suspension hydraulic cylinder and the right suspension hydraulic cylinder are connected to the vehicle frame, and the cylinder bodies are connected to the axle. The first left accumulator, the second left accumulator, the first right accumulator, and the second right accumulator are installed at appropriate positions on the vehicle and are connected to the corresponding hydraulic cylinder chambers. The three-position four-way valve is installed at the middle position of the vehicle chassis and is connected to the left and right suspension hydraulic cylinders through hydraulic pipelines.

[0110] The vehicle further includes a control system for controlling the working position of the three-position four-way valve according to the driving state of the vehicle and the road surface conditions. The control system can receive signals from a vehicle speed sensor, an acceleration sensor, a steering wheel angle sensor, etc., and after comprehensive analysis, determine the working position of the three-position four-way valve, thereby realizing the intelligent adjustment of the suspension system.

[0111] When the vehicle is driving straight on a flat road surface, the control system can make the three-position four-way valve work in the middle position, and the left and right suspension hydraulic cylinders work independently, providing good ride comfort. When the vehicle turns, the control system can make the three-position four-way valve work in the left or right position. Through the hydraulic connection between the left and right suspension hydraulic cylinders, the body roll is reduced, and the handling stability of the vehicle is improved. When the vehicle is driving on a rough road surface, the control system can dynamically adjust the working position of the three-position four-way valve according to the road conditions, optimize the working state of the suspension system, and improve the passing performance and ride comfort of the vehicle.

[0112] Figure 14 The figure is a schematic diagram of the overall structure of a unidirectional variable damping valve according to an embodiment of the present invention. Figure 15 The figure is a schematic sectional view of the overall structure of a unidirectional variable damping valve according to an embodiment of the present invention.

[0113] Reference Figures 14 - 15 Referring to

[0114] In some embodiments, the hydraulic control device includes a unidirectional variable damping valve 800. The unidirectional variable damping valve is connected between the suspension hydraulic cylinder and the accumulator for realizing unidirectional damping adjustment of the fluid. The unidirectional variable damping valve in the embodiments of the present application can achieve the adaptive characteristic of providing high damping at small flow rates and low damping at large flow rates. In some embodiments, the hydraulic control device includes a plurality of unidirectional variable damping valves 800, and there is a unidirectional variable damping valve 800 between each chamber of each suspension hydraulic cylinder and the accumulator.

[0115] In some embodiments, the oil guiding block 803 is fixedly arranged inside the valve body 801. The oil guiding block has a first flow channel cavity and a second flow channel cavity. The central part of the oil guiding block 803 is empty, forming the second flow channel cavity. The large return spring 809 and the electromagnet assembly 811 are arranged at one end of the valve core 804, and the other end of the valve core 804 is slidably arranged inside the first flow channel cavity of the oil guiding block 803. The damping valve plate 805 is arranged between the valve core 804 and the oil guiding block 803 and is used for controlling the flow resistance of the hydraulic oil. The rubber check valve 802 is arranged at one end of the second flow channel cavity, and the small return spring 813 is arranged between the valve body 801 and the rubber check valve 802 and is used for maintaining the initial position of the rubber check valve.

[0116] In some embodiments, the one-way variable damping valve 800 further includes a snap ring 806 and a support plate 807. The support plate 807 is arranged inside the valve body 801 and is used for supporting and guiding the movement of the valve core 804. The lower end of the support plate 807 mounts the damping valve plate 805 through the snap ring 806, and the damping valve plate 805 and the oil guiding block 803 jointly define the fluid path.

[0117] In some embodiments, the one-way variable damping valve 800 further includes a suction cup 808. The valve core 804 is driven by the electromagnet assembly 811 through the suction cup 808. In some embodiments, the upper end of the valve core 804 is provided with a thread to be connected to the suction cup 808. A thread groove matching the valve core 804 is provided at the center of the suction cup 808, and a return spring base is arranged at the upper end of the suction cup 808. The circumferential of the valve body cover 812 is provided with an electromagnet assembly mounting surface and 4 electromagnet fixing surfaces for fixing the electromagnet assembly 811. The electromagnet assembly mounting surface inside the valve body cover 812 is inclined, which is convenient for the assembly of the electromagnet assembly 811.

[0118] In some embodiments, the one-way variable damping valve 800 further includes an O-ring 810 and a valve body cover 812. The valve body cover 812 is fixed to the top of the valve body 801 through bolts and is sealed through the O-ring 810. The electromagnet assembly 811 is accommodated inside the valve body cover 812. The bottom of the valve body cover 812 is provided with an annular inclined surface, i.e., the electromagnet assembly mounting surface, and the diameter of the bottom of the inclined surface is equal to or slightly larger than the electromagnet assembly. Four mating surfaces are provided inside the valve body cover 812 for fixedly connecting with the electromagnet assembly 811.

[0119] In some embodiments, the inside of the first flow channel cavity of the oil guiding block includes a conical part, and one end of the valve core arranged inside the first flow channel cavity of the oil guiding block matches the conical part. The conical design enables effective truncation and opening between the valve core and the oil guiding block, and can control the flow direction and damping adjustment of the hydraulic oil.

[0120] In some embodiments, the stiffness of the large return spring 809 is greater than that of the small return spring 813. This design enables the two springs to play their respective roles under different working conditions. When the electromagnet assembly is powered off, the valve core abuts against the conical part in the first flow channel cavity of the oil guiding block under the initial elastic force of the large return spring. At this time, the flow channel between the valve core and the oil guiding block is closed, and hydraulic oil cannot pass through. When the electromagnet assembly is powered on, the valve core moves against the elastic force of the large return spring, forming a gap with the conical part in the first flow channel cavity of the oil guiding block, and hydraulic oil can flow through this gap.

[0121] Figure 16 Schematic diagram of the principle of a working state of a one-way variable damping valve according to an embodiment of the present invention. Figure 17 Schematic diagram of the principle of another working state of a one-way variable damping valve according to an embodiment of the present invention. The arrows in the figure indicate the fluid flow direction. The working principle of the vehicle oil-gas suspension system in some embodiments of the present application is as follows.

[0122] Reference Figure 16 , when the electromagnet assembly 811 is in the non-powered state, the valve core 804 is pressed tightly against the oil guiding block 803 by the large return spring 809, and the passage from the first oil port to the second oil port is blocked, while the passage from the second oil port to the first oil port is normal. At this time, the one-way variable damping valve is used as a one-way valve (the arrows in the figure indicate the fluid flow direction).

[0123] Reference Figure 17 , when the electromagnet assembly 811 is powered on, by controlling the magnetic force of the electromagnet assembly 811, under the simultaneous action of the magnetic force and the return force exerted by the large return spring 809, the position of the valve core 804 can be determined, and the size of the gap between it and the oil guiding block 803 is controllable, enabling the opening degree of the fluid passage to be controlled, and further controlling the damping of the first part of the passage. In the second part, that is, at the damping valve plate 805, due to the existence of an initial gap, there is an initial damping in the passage. When the flow rate increases, the damping valve plate 805 deforms under force, increasing the opening degree of the passage and thereby reducing the damping. The first part and the second part are connected in series to achieve the effect of controllable damping for the one-way passage (the arrows in the figure indicate the fluid flow direction).

[0124] Correspondingly, when the vehicle is driving on a flat road surface, the electromagnet assembly is in the powered-off state, and the valve core abuts against the conical part of the oil guiding block under the action of the large return spring, blocking the passage of hydraulic oil from the first flow channel cavity to the second flow channel cavity. At this time, the hydraulic oil can only flow through the one-way check flow path between the rubber check valve and the second flow channel cavity, and can only flow from the first oil port to the second oil port, and cannot flow in the reverse direction. In this state, the suspension system has a large damping force, and the vehicle driving stability is good.

[0125] When the vehicle is traveling on a rough road surface, the electromagnet assembly is energized, the spool moves against the elastic force of the large return spring, and a gap is formed between the spool and the conical part of the oil guide block. Hydraulic oil can flow from the first flow channel cavity to the second flow channel cavity through this gap, and can also flow through the one-way check flow path between the rubber check valve and the second flow channel cavity. In this state, the damping force of the suspension system decreases, and the comfort of the vehicle is improved.

[0126] When the vehicle encounters an emergency and needs to respond quickly, the on-off state of the electromagnet assembly can be controlled to achieve a rapid switching of the damping force, improving the controllability and safety of the vehicle.

[0127] In the embodiment of the present application, the hydraulic control device of the vehicle oil-gas interconnected suspension system may simultaneously include a three-position four-way valve 700 and a one-way variable damping valve 800, and has the advantages and effects of both the three-position four-way valve 700 and the one-way variable damping valve 800, which can further improve the controllability and safety of the vehicle.

[0128] In the embodiment of the present application, the vehicle includes the oil-gas interconnected suspension system described in any of the above embodiments, and the vehicle has all the above beneficial effects.

[0129] Those skilled in the art can easily understand that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vehicle oil-gas interconnected suspension system, characterized in that, The vehicle oil-gas interconnected suspension system includes: A left suspension hydraulic cylinder (100) and a right suspension hydraulic cylinder (200), both having a piston rod and a cylinder block. One end of the piston rod is used to connect to the vehicle frame, and the cylinder block is connected to the axle. A first left accumulator (300) and a second left accumulator (400), which are respectively connected to the first chamber and the second chamber of the left suspension hydraulic cylinder. A first right accumulator (500) and a second right accumulator (600), which are respectively connected to the first chamber and the second chamber of the right suspension hydraulic cylinder. A three-position four-way valve (700), which is connected to the left suspension hydraulic cylinder and the right suspension hydraulic cylinder. The three-position four-way valve includes a valve body (1) and a spool (2). A first oil port (103), a second oil port (104), a third oil port (105), and a fourth oil port (106) are radially penetrated through the middle of the valve body (1). A first upper oil guiding groove (204), a second upper oil guiding groove (205), a first middle oil guiding groove (206), a second middle oil guiding groove (207), and a lower oil guiding groove (208) are arranged on the side of the spool (2). A through hole (209) is provided at the lower end of the spool (2).

2. The vehicle oil-gas interconnected suspension system according to claim 1, wherein A positioning guide rail (201) is provided on the surface of the spool (2), and a guiding groove (102) matched with the positioning guide rail (201) is arranged on the inner wall of the valve body (1).

3. The vehicle oil-gas interconnected suspension system according to claim 2, characterized in that, The three-position four-way valve includes a first return spring (3), a first connecting rod (4), a second return spring (6), a second connecting rod (7), a first electromagnet (11), and a second electromagnet (13). The first return spring (3) and the first electromagnet (11) are connected to the first connecting rod (4). The second return spring (6) and the second electromagnet (13) are connected to the second connecting rod (7). The first connecting rod (4) and the second connecting rod (7) are respectively connected to both ends of the spool (2) by threads.

4. The vehicle oil-gas interconnected suspension system according to claim 3, characterized in that, The three-position four-way valve includes an oil pipe (9), and the oil pipe (9) communicates with the first oil chamber and the second oil chamber of the valve body (1).

5. The vehicle oil-gas interconnected suspension system according to claim 4, wherein The three-position four-way valve includes a first valve body cover (5) and a second valve body cover (8). The first valve body cover (5) and the second valve body cover (8) are respectively connected to both ends of the valve body (1) by bolts to seal the valve body (1).

6. The vehicle oil-gas interconnected suspension system according to claim 5, characterized in that, A boss (101) is provided in the middle section of the valve body (1), which is in clearance fit with the spool (2). The guiding groove (102) is arranged on the boss (101) and is in clearance fit with the positioning guide rail (201) on the spool (2).

7. The vehicle oil-gas interconnected suspension system according to claim 6, characterized in that, The first upper oil guiding groove (204) and the second upper oil guiding groove (205) are arranged oppositely. When the second electromagnet (13) is energized and the first electromagnet (11) is de-energized, the first oil port (103) and the second oil port (104) are both communicated with the first upper oil guiding groove (204), and the third oil port (105) and the fourth oil port (106) are both communicated with the second upper oil guiding groove (205), and the three-position four-way valve works in the middle position. When the first electromagnet (11) is energized and the second electromagnet (13) is de-energized, the first oil port (103) and the third oil port (105) are both in communication with the through hole (209), the second oil port (104) and the fourth oil port (106) are both in communication with the lower oil guide groove (208), and the three-way four-way valve operates in the left position; When both the first electromagnet (11) and the second electromagnet (13) are de-energized, the first oil port (103) and the fourth oil port (106) are both in communication with the first middle oil guide groove (206), the second oil port (104) and the third oil port (105) are both in communication with the second middle oil guide groove (207), and the three-way four-way valve operates in the right position.

8. The vehicle oil-gas interconnected suspension system according to claim 7, characterized in that, The second middle oil guide groove (207) is in communication with the lower oil guide groove (208); The lower oil guide groove (208) and the second middle oil guide groove (207) form a "concave" - shaped structure on one side surface of the valve core. One end (P203F3) of the through hole (2090) is arranged in the middle of the "concave" - shaped structure, aligned with one side position (P203F1) of the second upper oil guide groove (205) and one side position (P203F2) of the second middle oil guide groove (207). The other end (P201F3) of the through hole (209) is circumferentially aligned with one side position (P201F1) of the first upper oil guide groove (204) and one side position (P201F2) of the first middle oil guide groove (206).

9. A hydraulic control device for a vehicle oil-gas interconnected suspension system, characterized in that, The hydraulic control device includes: a three-way four-way valve connected to the left suspension hydraulic cylinder and the right suspension hydraulic cylinder of the vehicle oil-gas interconnected suspension system; the three-way four-way valve includes a valve body (1), a valve core (2), a first electromagnet (11), and a second electromagnet (13); The middle part of the valve body (1) is radially penetrated with a first oil port (103), a second oil port (104), a third oil port (105), and a fourth oil port (106); The side surface of the valve core (2) is provided with a first upper oil guide groove (204), a second upper oil guide groove (205), a first middle oil guide groove (206), a second middle oil guide groove (207), and a lower oil guide groove (208). The lower end of the valve core (2) is provided with a through hole (209); When the second electromagnet (13) is energized and the first electromagnet (11) is de-energized, the first oil port (103) and the second oil port (104) are both in communication with the first upper oil guide groove (204), the third oil port (105) and the fourth oil port (106) are both in communication with the second upper oil guide groove (205), and the three-way four-way valve operates in the middle position; When the first electromagnet (11) is energized and the second electromagnet (13) is de-energized, the first oil port (103) and the third oil port (105) are both in communication with the through hole (209), the second oil port (104) and the fourth oil port (106) are both in communication with the lower oil guide groove (208), and the three-way four-way valve operates in the left position; When both the first electromagnet (11) and the second electromagnet (13) are de-energized, the first oil port (103) and the fourth oil port (106) are both in communication with the first intermediate oil guiding groove (206), the second oil port (104) and the third oil port (105) are both in communication with the second intermediate oil guiding groove (207), and the three-position four-way valve operates in the right position.

10. A vehicle, characterized in that, The vehicle includes the oil-gas interconnected suspension system according to any one of claims 1-8.

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