Liquid path control device, braking system, vehicle and control method

Abstract

The invention relates to a liquid path control device, a braking system, a vehicle and a control method. The liquid path control device comprises a first flow path suitable for being connected with an oil path of a left front wheel cylinder; the second flow path is suitable for being connected with an oil path of a right front wheel cylinder; the third flow path is suitable for being connected with an oil path of a right rear wheel cylinder; the fourth flow path is suitable for being connected with an oil path of a left rear wheel cylinder; the first switching valve and the second switching valve are used for receiving the hydraulic pressure output by the pressure providing device and can be switched between a first state and a second state; in the first state, the first switching valve communicates with the first flow path and the third flow path, the second switching valve communicates with the second flow path and the fourth flow path, and in the second state, the first switching valve communicates with the first flow path and the second flow path, and the second switching valve communicates with the third flow path and the fourth flow path. According to the liquid path control device provided by the embodiment of the invention, the switching of the hydraulic loops can be realized, so that the liquid path control device at least comprises two hydraulic loops.

Description

Technical Field

[0001] The present application relates to the field of braking technology, and in particular to a hydraulic circuit control device, a braking system, a vehicle and a control method. Background Art

[0002] In the braking system, braking is mainly achieved by hydraulic or mechanical means. When braking by hydraulic means, it is necessary to transmit the hydraulic pressure to the brake components through a hydraulic circuit control device to achieve braking.

[0003] The hydraulic circuit of the hydraulic circuit control device in the related art is relatively simple. Summary of the invention

[0004] An embodiment of the present application provides a hydraulic circuit control device, which includes at least two hydraulic circuits, to at least partially solve the above-mentioned technical problems.

[0005] In order to achieve the above object, according to a first aspect of the present application, a fluid circuit control device is provided, comprising:

[0006] A first flow path, adapted to be connected to an oil path of a left front wheel cylinder;

[0007] A second flow path, adapted to be connected to the oil path of the right front wheel cylinder;

[0008] A third flow path, adapted to be connected to the oil path of the right rear wheel cylinder;

[0009] A fourth flow path, adapted to be connected to the oil path of the left rear wheel cylinder;

[0010] The first switching valve and the second switching valve are used to receive the hydraulic pressure output by the pressure providing device, and both can be switched between a first state and a second state;

[0011] In the first state, the first switching valve connects the first flow path and the third flow path, and the second switching valve connects the second flow path and the fourth flow path. In the second state, the first switching valve connects the first flow path and the second flow path, and the second switching valve connects the third flow path and the fourth flow path.

[0012] Optionally, the second flow channel of the first switching valve and the second flow channel of the first switching valve are both used to receive the hydraulic pressure output by the pressure providing device;

[0013] The first flow passage of the first switching valve is connected to the second flow passage, the third flow passage of the first switching valve is connected to the third flow passage, and the second flow passage of the first switching valve is connected to the first flow passage;

[0014] The first flow passage of the second switching valve is connected to the third flow passage, the third flow passage of the second switching valve is connected to the second flow passage, and the second flow passage of the second switching valve is connected to the fourth flow passage;

[0015] In the first state, the second flow channel and the third flow channel of the first switching valve are connected, and the second flow channel and the third flow channel of the second switching valve are connected. In the second state, the first flow channel and the second flow channel of the first switching valve are connected, and the first flow channel and the second flow channel of the second switching valve are connected.

[0016] Optionally, the liquid circuit control device further includes a third switching valve, a third flow channel of the third switching valve is connected to an output port of the pressure providing device, and the first flow path and the first switching valve are both connected to a second flow channel of the third switching valve.

[0017] Optionally, the fluid circuit control device further includes a master cylinder, and the first flow channel of the third switching valve is connected to the master cylinder;

[0018] The third switching valve can be switched between a third state and a fourth state. In the third state, the second flow channel and the third flow channel of the third switching valve are connected. In the fourth state, the first flow channel and the second flow channel of the third switching valve are connected.

[0019] Optionally, the hydraulic circuit control device further includes an oil storage component, the master cylinder is provided with an oil hole, and the oil hole is connected to the oil storage component.

[0020] Optionally, the liquid circuit control device also includes a fourth switching valve, the third flow channel of the fourth switching valve is connected to the output port of the pressure providing device, and the fourth flow path and the second switching valve are both connected to the second flow channel of the fourth switching valve.

[0021] Optionally, the fluid circuit control device further includes an oil storage component, and the first flow channel of the fourth switching valve is connected to the oil storage component;

[0022] The fourth switching valve can be switched between a fifth state and a sixth state. In the fifth state, the second flow channel and the third flow channel of the fourth switching valve are connected. In the sixth state, the first flow channel and the second flow channel of the fourth switching valve are connected.

[0023] Optionally, the first switching valve and the second switching valve are both two-position three-way valves; and / or the third switching valve and the fourth switching valve are both two-position three-way valves.

[0024] Optionally, the two-position three-way valve comprises a body, a position adjustment component and a switching element.

[0025] The body is formed with a first flow channel, a second flow channel and a third flow channel;

[0026] The position adjustment component and the switching member are both installed on the body, the position adjustment component is connected to the switching member, and the position adjustment component is used to drive the switching member to move so that the two-position three-way valve switches between the first position and the second position;

[0027] In the first position, the second flow channel of the body is communicated with the third flow channel of the body, and in the second position, the first flow channel of the body is communicated with the second flow channel of the body.

[0028] Optionally, the position adjustment component includes a driving member and a reset member, the driving member and the reset member are both mounted on the body, and the driving member and the reset member are both connected to the switching member;

[0029] The driving member is used to drive the switching member to move so that the two-position three-way valve switches from the second position to the first position;

[0030] The reset member is used to drive the switching member to reset, so that the two-position three-way valve is switched from the first position to the second position.

[0031] Optionally, the body is formed with a connecting flow path communicating with the second flow channel, the switching member includes a switching column, a first blocking block and a second blocking block, the first blocking block and the second blocking block are both connected to the switching column, and the switching column is connected to the driving member;

[0032] Wherein, in the first position, the first blocking block disconnects the first flow channel and the connecting flow path, and in the second position, the second blocking block disconnects the third flow channel and the connecting flow path.

[0033] Optionally, the two-position three-way valve further includes a filter element, and the filter element is provided at at least one of the first flow channel, the second flow channel and the third flow channel.

[0034] Optionally, the filter element includes a mounting seat, a first filter screen and a second filter screen, the first filter screen and the second filter screen are both installed on the mounting seat, and the first filter screen and the second filter screen are arranged in sequence along the flow direction of the hydraulic oil in the first flow channel, along the flow direction of the hydraulic oil in the second flow channel, or along the flow direction of the hydraulic oil in the third flow channel.

[0035] Optionally, the diameter of the filter holes of the first filter screen is greater than the diameter of the filter holes of the second filter screen.

[0036] According to a second aspect of the present application, a braking system is provided, comprising the hydraulic circuit control device as described above.

[0037] According to a third aspect of the present application, a vehicle is provided, comprising the braking system as described above.

[0038] According to a fourth aspect of the present application, a control method is also provided, comprising:

[0039] Obtain vehicle driving information;

[0040] Based on the driving information of the vehicle, the states of the first switching valve and the second switching valve are controlled.

[0041] Optionally, the fluid circuit control device further includes a third switching valve and a master cylinder, wherein the third switching valve is connected between the pressure providing device and the first switching valve, and the third switching valve is connected to the master cylinder;

[0042] The control method further comprises:

[0043] When the pressure supply device is in a faulty state, the third switching valve is controlled to connect the first switching valve and the master cylinder.

[0044] Optionally, the control method further includes: controlling the first switching valve to be in the second state.

[0045] Optionally, the fluid circuit control device further comprises a fourth switching valve and an oil storage member, wherein the fourth switching valve is connected between the pressure providing device and the second switching valve, and the fourth switching valve is connected to the oil storage member;

[0046] The control method further includes: controlling the fourth switching valve to connect the oil reservoir and the second switching valve.

[0047] In the hydraulic circuit control device of the embodiment of the present application, by making the first switching valve and the second switching valve be in the first state at the same time, the first switching valve connects the first flow path and the third flow path, and the second switching valve connects the second flow path and the fourth flow path, that is, at this time the oil circuit of the left front wheel cylinder and the oil circuit of the right rear wheel cylinder are connected, and the oil circuit of the right front wheel cylinder and the oil circuit of the left rear wheel cylinder are connected, a part of the hydraulic pressure output by the pressure providing device is transmitted to the left front wheel cylinder and the right rear wheel cylinder, and the other part of the hydraulic pressure is transmitted to the right front wheel cylinder and the left rear wheel cylinder.

[0048] By making the first switching valve and the second switching valve be in the second state at the same time, the first switching valve connects the first flow path and the second flow path, and the second switching valve connects the third flow path and the fourth flow path, that is, at this time the oil path of the left front wheel cylinder is connected to the oil path of the right front wheel cylinder, and the oil path of the right rear wheel cylinder is connected to the oil path of the left rear wheel cylinder, a part of the hydraulic pressure output by the pressure providing device is transmitted to the left front wheel cylinder and the right front wheel cylinder, and the other part of the hydraulic pressure is transmitted to the right rear wheel cylinder and the left rear wheel cylinder.

[0049] That is to say, when the first switching valve and the second switching valve are in different states, the hydraulic flow direction of the hydraulic circuit control device is different. Then, by controlling the state switching of the first switching valve and the second switching valve, the switching of the hydraulic circuit can be realized, so that the hydraulic circuit control device includes at least two hydraulic circuits.

[0050] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0052] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0053] Figure 1 is a schematic structural diagram of a fluid circuit control device provided in an exemplary embodiment of the present disclosure;

[0054] Figure 2 Schematic diagram of the structure of the fluid circuit control device provided in an exemplary embodiment of the present disclosure, wherein: Figure 2 Hydraulic circuit and Figure 1 different;

[0055] Figure 3 is a structural schematic diagram of a hydraulic circuit control device provided in an exemplary embodiment of the present disclosure, wherein the hydraulic circuit in the figure is a hydraulic circuit when the pressure providing device is in a fault;

[0056] Figure 4 is one of the structural schematic diagrams of a two-position three-way valve provided in an exemplary embodiment of the present disclosure;

[0057] Figure 5 This is the second structural schematic diagram of a two-position three-way valve provided in an exemplary embodiment of the present disclosure;

[0058] Figure 6 is a flowchart of the steps of a control method provided in an exemplary embodiment of the present disclosure.

[0059] Description of reference numerals:

[0060] 1. First flow path; 2. Second flow path; 3. Third flow path; 4. Fourth flow path; 5. First switching valve; 6. Second switching valve; 7. Pressure providing device; 8. Third switching valve; 9. Master cylinder; 10. Oil storage member; 11. Left front wheel cylinder; 12. Fourth switching valve; 13. Main body; 14. Position adjustment component; 15. Switching member; 16. Filter member; 21. Right front wheel cylinder; 31. Right rear wheel cylinder; 41. Left rear wheel cylinder; 131. First flow channel; 132. Second flow channel; 133. Third flow channel; 134. Connecting flow path; 141. Driving member; 142. Resetting member; 151. Switching column; 152. First blocking block; 153. Second blocking block; 161. Mounting seat; 162. First filter screen; 163. Second filter screen. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0062] Figures 1 to 3 The yellow, blue, and green lines in the figure represent connected flow paths.

[0063] According to the first aspect of the present application, refer to Figures 1 to 5 , the present application provides a fluid circuit control device, comprising:

[0064] The first flow path 1 is suitable for connecting with the oil path of the left front wheel cylinder 11;

[0065] The second flow path 2 is suitable for connecting with the oil path of the right front wheel cylinder 21;

[0066] The third flow path 3 is adapted to be connected to the oil path of the right rear wheel cylinder 31;

[0067] The fourth flow path 4 is adapted to be connected to the oil path of the left rear wheel cylinder 41;

[0068] The first switching valve 5 and the second switching valve 6 are used to receive the hydraulic pressure output by the pressure providing device 7, and both can be switched between a first state and a second state;

[0069] In the first state, the first switching valve 5 connects the first flow path 1 and the third flow path 3, and the second switching valve 6 connects the second flow path 2 and the fourth flow path 4. In the second state, the first switching valve 5 connects the first flow path 1 and the second flow path 2, and the second switching valve 6 connects the third flow path 3 and the fourth flow path 4.

[0070] It can be understood that by making the first switching valve 5 and the second switching valve 6 be in the first state at the same time, the first switching valve 5 connects the first flow path 1 and the third flow path 3, and the second switching valve 6 connects the second flow path 2 and the fourth flow path 4, that is, at this time, the oil circuit of the left front wheel cylinder 11 is connected to the oil circuit of the right rear wheel cylinder 31, and the oil circuit of the right front wheel cylinder 21 is connected to the oil circuit of the left rear wheel cylinder 41, and a part of the hydraulic pressure output by the pressure providing device 7 is transmitted to the left front wheel cylinder 11 and the right rear wheel cylinder 31, and the other part of the hydraulic pressure is transmitted to the right front wheel cylinder 21 and the left rear wheel cylinder 41.

[0071] By making the first switching valve 5 and the second switching valve 6 be in the second state at the same time, the first switching valve 5 is connected to the first flow path 1 and the second flow path 2, and the second switching valve 6 is connected to the third flow path 3 and the fourth flow path 4, that is, at this time, the oil circuit of the left front wheel cylinder 11 is connected to the oil circuit of the right front wheel cylinder 21, and the oil circuit of the right rear wheel cylinder 31 is connected to the oil circuit of the left rear wheel cylinder 41, and a part of the hydraulic pressure output by the pressure providing device 7 is transmitted to the left front wheel cylinder 11 and the right front wheel cylinder 21, and the other part of the hydraulic pressure is transmitted to the right rear wheel cylinder 31 and the left rear wheel cylinder 41.

[0072] That is to say, when the first switching valve 5 and the second switching valve 6 are in different states, the hydraulic flow direction of the hydraulic circuit control device is different. Then, by controlling the state switching of the first switching valve 5 and the second switching valve 6, the switching of the hydraulic circuit can be realized, so that the hydraulic circuit control device includes at least two hydraulic circuits.

[0073] It can be understood that the first switching valve 5 and the second switching valve 6 can be used to switch between the two hydraulic circuits, which can meet different needs, different road conditions and hydraulic oil circuit switching in different modes.

[0074] Illustratively, during the process of vehicle turning, U-turning, etc., the first switching valve 5 and the second switching valve 6 are simultaneously in the first state, the hydraulic pressure of the left front wheel cylinder 11 and the right rear wheel cylinder 31 are the same, and the hydraulic pressure of the right front wheel cylinder 21 and the left rear wheel cylinder 41 are the same, so that the braking force of the left front wheel cylinder 11 and the right rear wheel cylinder 31 are consistent, and the braking force of the right front wheel cylinder 21 and the left rear wheel cylinder 41 are consistent, which can effectively maintain the vehicle body posture, reduce the occurrence of vehicle skidding, etc., and is safer and more reliable.

[0075] Exemplarily, in situations such as straight-line driving and emergency braking, the first switching valve 5 and the second switching valve 6 are simultaneously in the second state, the hydraulic pressures of the left front wheel cylinder 11 and the right front wheel cylinder 21 are the same, and the hydraulic pressures of the right rear wheel cylinder 31 and the left rear wheel cylinder 41 are the same, so that the braking forces of the left front wheel cylinder 11 and the right front wheel cylinder 21 are consistent, and the braking forces of the right rear wheel cylinder 31 and the left rear wheel cylinder 41 are consistent, which can prevent the vehicle from tilting and is safer.

[0076] In some examples, the pressure providing device 7 is, for example, a motor piston pump.

[0077] In some embodiments, see Figure 1 and Figure 2 , the second flow channel 132 of the first switching valve 5 and the second flow channel 132 of the first switching valve 5 are both used to receive the hydraulic pressure output by the pressure providing device 7;

[0078] The first flow passage 131 of the first switching valve 5 is connected to the second flow passage 2, the third flow passage 133 of the first switching valve 5 is connected to the third flow passage 3, and the second flow passage 132 of the first switching valve 5 is connected to the first flow passage 1;

[0079] The first flow passage 131 of the second switching valve 6 is connected to the third flow passage 3, the third flow passage 133 of the second switching valve 6 is connected to the second flow passage 2, and the second flow passage 132 of the second switching valve 6 is connected to the fourth flow passage 4;

[0080] In the first state, the second flow channel 132 and the third flow channel 133 of the first switching valve 5 are connected, and the second flow channel 132 and the third flow channel 133 of the second switching valve 6 are connected. In the second state, the first flow channel 131 and the second flow channel 132 of the first switching valve 5 are connected, and the first flow channel 131 and the second flow channel 132 of the second switching valve 6 are connected.

[0081] It can be understood that the hydraulic pressure output by the pressure providing device 7 can be delivered to the second flow channel 132 of the first switching valve 5 and the second flow channel 132 of the first switching valve 5 .

[0082] By controlling the first switching valve 5 and the second switching valve 6 to be in the first state at the same time, the first switching valve 5 connects the first flow path 1 and the third flow path 3, so that the oil path of the left front wheel cylinder 11 and the oil path of the right rear wheel cylinder 31 are connected, and the second switching valve 6 connects the second flow path 2 and the fourth flow path 4, so that the oil path of the right front wheel cylinder 21 and the oil path of the left rear wheel cylinder 41 are connected, and a part of the hydraulic pressure output by the pressure providing device 7 is transmitted to the left front wheel cylinder 11 and the right rear wheel cylinder 31, and the other part of the hydraulic pressure is transmitted to the right front wheel cylinder 21 and the left rear wheel cylinder 41.

[0083] By controlling the first switching valve 5 and the second switching valve 6 to be in the second state at the same time, the first switching valve 5 connects the first flow path 1 and the second flow path 2, so that the oil path of the left front wheel cylinder 11 is connected to the oil path of the right front wheel cylinder 21, and the second switching valve 6 connects the third flow path 3 and the fourth flow path 4, so that the oil path of the right rear wheel cylinder 31 is connected to the oil path of the left rear wheel cylinder 41, and a part of the hydraulic pressure output by the pressure providing device 7 is transmitted to the left front wheel cylinder 11 and the right front wheel cylinder 21, and the other part of the hydraulic pressure is transmitted to the right rear wheel cylinder 31 and the left rear wheel cylinder 41.

[0084] That is to say, by controlling the states of the first switching valve 5 and the second switching valve 6 , the switching of the hydraulic circuit of the hydraulic circuit control device can be achieved, so that the hydraulic circuit control device includes at least two hydraulic circuits.

[0085] In some embodiments, see Figure 1 and Figure 2 The liquid circuit control device also includes a third switching valve 8, a third flow channel 133 of the third switching valve 8 is connected to the output port of the pressure providing device 7, and the first flow channel 1 and the first switching valve 5 are both connected to the second flow channel 132 of the third switching valve 8.

[0086] It can be understood that by controlling the on-off connection between the third flow channel 133 and the second flow channel 132 of the third switching valve 8, the on-off connection between the pressure supply device 7 and the first switching valve 5 can be controlled, and the on-off connection between the first flow channel 1 and the pressure supply device 7 can be controlled. In other words, the third switching valve 8 can control whether the hydraulic pressure output by the pressure supply device 7 is transmitted to the first switching valve 5 and the left front wheel cylinder 11.

[0087] Exemplarily, the second flow passage 132 of the first switching valve 5 is connected to the second flow passage 132 of the third switching valve 8 .

[0088] In some embodiments, see Figure 3 , the hydraulic circuit control device further includes a master cylinder 9, and the first flow channel 131 of the third switching valve 8 is connected to the master cylinder 9;

[0089] The third switching valve 8 can switch between a third state and a fourth state. In the third state, the second flow channel 132 and the third flow channel 133 of the third switching valve 8 are connected. In the fourth state, the first flow channel 131 and the second flow channel 132 of the third switching valve 8 are connected.

[0090] It is understandable that when the hydraulic circuit control device works normally, the third switching valve 8 can be controlled to be in the third state, so that the second flow channel 132 and the third flow channel 133 of the third switching valve 8 are connected, and the pressure output by the pressure providing device 7 can be transmitted to the first switching valve 5 and the left front wheel cylinder 11. The first switching valve 5 can make the hydraulic pressure of the left front wheel cylinder 11 the same as the hydraulic pressure of the right front wheel cylinder 21, or make the hydraulic pressure of the left front wheel cylinder 11 the same as the hydraulic pressure of the right rear wheel cylinder 31. At the same time, the third switching valve 8 can also disconnect the first flow channel 131 and the second flow channel 132, so as to separate the master cylinder 9 from the first switching valve 5, and separate the master cylinder 9 from the first oil circuit, so as to avoid the influence of the master cylinder 9 on the hydraulic transmission.

[0091] It is understandable that when the pressure providing device 7 fails, it means that the pressure providing device 7 can no longer increase the hydraulic pressure of the wheel cylinder. At this time, the third switching valve 8 is controlled to be in the fourth state to connect the first switching valve 5 and the master cylinder 9, so that the two wheel cylinders connected to the first switching valve 5 can be directly connected to the master cylinder 9. When the brake pedal is stepped on, the hydraulic oil in the master cylinder 9 can flow to the two wheel cylinders connected to the first switching valve 5 to achieve mechanical braking and avoid direct loss of braking force.

[0092] In some embodiments, see Figure 3 The hydraulic circuit control device also includes an oil storage member 10 , and the master cylinder 9 is provided with an oil hole, which is connected to the oil storage member 10 .

[0093] It is understandable that the hydraulic oil output by the pressure providing device 7 will be transmitted to the two wheel cylinders connected to the first switching valve 5. When the pressure providing device 7 suddenly fails in the process of outputting pressure, the hydraulic oil output by the pressure providing device 7 will remain in the two wheel cylinders connected to the first switching valve 5. At this time, the third switching valve 8 can be controlled to be in the fourth state, and the third switching valve 8 connects the first switching valve 5 and the master cylinder 9, so that the hydraulic oil in the two wheel cylinders connected to the first switching valve 5 can return to the oil storage part 10 through the oil hole of the master cylinder 9, ensuring that in the case of a failure of the pressure providing device 7, the hydraulic oil in the two wheel cylinders connected to the first switching valve 5 can return to the oil storage part 10.

[0094] In some embodiments, see Figure 3 The liquid circuit control device also includes a fourth switching valve 12, a third flow channel 133 of the fourth switching valve 12 is connected to the output port of the pressure providing device 7, and the fourth flow channel 4 and the second switching valve 6 are both connected to the second flow channel 132 of the fourth switching valve 12.

[0095] It can be understood that by controlling the on-off connection between the third flow channel 133 and the second flow channel 132 of the fourth switching valve 12, the on-off connection between the pressure supply device 7 and the second switching valve 6 can be controlled, and the on-off connection between the fourth flow path 4 and the pressure supply device 7 can be controlled. In other words, the fourth switching valve 12 can control whether the hydraulic pressure output by the pressure supply device 7 is transmitted to the second switching valve 6 and the left rear wheel cylinder 41.

[0096] Exemplarily, the second flow passage 132 of the second switching valve 6 is connected to the second flow passage 132 of the fourth switching valve 12 .

[0097] In some embodiments, see Figure 3 , the fluid circuit control device further includes an oil storage member 10, and the first flow channel 131 of the fourth switching valve 12 is connected to the oil storage member 10;

[0098] The fourth switching valve 12 can switch between a fifth state and a sixth state. In the fifth state, the second flow channel 132 and the third flow channel 133 of the fourth switching valve 12 are connected. In the sixth state, the first flow channel 131 and the second flow channel 132 of the fourth switching valve 12 are connected.

[0099] It can be understood that when the hydraulic circuit control device works normally, the fourth switching valve 12 is controlled to be in the fifth state, so that the second flow channel 132 and the third flow channel 133 of the fourth switching valve 12 are connected, and the hydraulic pressure output by the pressure providing device 7 can be transmitted to the second switching valve 6 and the left rear wheel cylinder 41. At the same time, the fourth switching valve 12 can also disconnect the first flow channel 131 and the second flow channel 132, so as to separate the oil storage member 10 from the second switching valve 6, and separate the oil storage member 10 from the fourth oil circuit, so as to avoid the influence of the oil storage member 10 on the hydraulic pressure transmission.

[0100] It is understandable that the hydraulic oil output by the pressure providing device 7 will be transmitted to the two wheel cylinders connected to the second switching valve 6. When the pressure providing device 7 suddenly fails in the process of outputting pressure, the hydraulic oil output by the pressure providing device 7 will remain in the two wheel cylinders connected to the second switching valve 6. At this time, the fourth switching valve 12 can be controlled to be in the sixth state, and the fourth switching valve 12 connects the second switching valve 6 and the oil storage member 10, so that the hydraulic oil in the two wheel cylinders connected to the second switching valve 6 can return to the oil storage member 10, ensuring that in the case of a failure of the pressure providing device 7, the hydraulic oil in the two wheel cylinders connected to the second switching valve 6 can return to the oil storage member 10.

[0101] In some examples, the oil storage member 10 is, for example, an oil pot.

[0102] In some embodiments, the first switching valve 5 and the second switching valve 6 are both two-position three-way valves.

[0103] It can be understood that using a two-position three-way valve as the first switching valve 5 and the second switching valve 6 can effectively reduce the number of valves and the number of oil circuits required for the hydraulic circuit control device.

[0104] In some embodiments, the third switching valve 8 and the fourth switching valve 12 are both two-position three-way valves.

[0105] It can be understood that using two-position three-way valves as the third switching valve 8 and the fourth switching valve 12 can effectively reduce the number of valves and the number of oil circuits required for the hydraulic circuit control device.

[0106] In some embodiments, see Figure 4 and Figure 5 The two-position three-way valve includes a body 13, a position adjustment component 14 and a switching element 15.

[0107] The body 13 is formed with a first flow channel 131, a second flow channel 132 and a third flow channel 133;

[0108] The position adjustment component 14 and the switching member 15 are both installed on the body 13, and the position adjustment component 14 is connected to the switching member 15. The position adjustment component 14 is used to drive the switching member 15 to move so that the two-position three-way valve switches between the first position and the second position;

[0109] In the first position, the second flow channel 132 of the body 13 is communicated with the third flow channel 133 of the body 13 , and in the second position, the first flow channel 131 of the body 13 is communicated with the second flow channel 132 of the body 13 .

[0110] It can be understood that the switching member 15 can be driven to move by the position adjustment component 14, so that the switching member 15 can switch the two-position three-way valve between the first position and the second position. In the first position, the second flow channel 132 and the third flow channel 133 of the two-position three-way valve are connected, and in the second position, the first flow channel 131 and the second flow channel 132 of the two-position three-way valve are connected, so that the two-position three-way valve can be connected to different flow paths when in different positions.

[0111] It can be understood that when the first switching valve 5 and the second switching valve 6 are two-position three-way valves, the two-position three-way valve is in the first position, which means that the first switching valve 5 and the second switching valve 6 are in the first state, and the two-position three-way valve is in the second position, which means that the first switching valve 5 and the second switching valve 6 are in the second state.

[0112] When the third switching valve 8 is a two-position three-way valve, the two-position three-way valve is in the first position when the third switching valve 8 is in the first state, and the two-position three-way valve is in the second position when the third switching valve 8 is in the second state.

[0113] When the fourth switching valve 12 is a two-position three-way valve, the two-position three-way valve is in the first position when the fourth switching valve 12 is in the first state, and the two-position three-way valve is in the second position when the fourth switching valve 12 is in the second state.

[0114] In some embodiments, see Figure 4 and Figure 5 The position adjustment component 14 includes a driving member 141 and a reset member 142, both of which are mounted on the body 13, and both of which are connected to the switching member 15;

[0115] The driving member 141 is used to drive the switching member 15 to move so that the two-position three-way valve is switched from the second position to the first position;

[0116] The reset member 142 is used to drive the switching member 15 to reset so that the two-position three-way valve is switched from the first position to the second position.

[0117] It is understandable that when the two-position three-way valve is required to be in the first position, the driving member 141 is controlled to work so that the driving member 141 drives the switching member 15 to move in the first direction, thereby making the two-position three-way valve in the first position.

[0118] When the two-position three-way valve is required to be in the second position, the driving member 141 is controlled to stop working. At this time, the reset member 142 can drive the switching member 15 to move in the second direction, so that the two-position three-way valve can be switched to the second position.

[0119] Illustratively, the first direction and the second direction are opposite.

[0120] In some examples, the return member 142 is, for example, a spring.

[0121] In some examples, the driving member 141 includes a static iron core, a moving iron core and a coil, the moving iron core is located inside the coil, and the switching member 15 is connected to the moving iron core. When the coil is energized, the moving iron core moves relative to the static iron core to drive the switching member 15 to move.

[0122] A reset member 142 is connected between the moving iron core and the stationary iron core to provide a return force for the moving iron core, thereby resetting the switching member 15 .

[0123] The coil is arranged on a limiting bracket, and the magnetic shield is placed outside the moving iron core to limit the moving iron core and prevent magnetic wave interference.

[0124] In some examples, the switching member 15 is, for example, a threaded ejector pin, the upper end of which is connected to the moving iron core via a thread, so that its movement is consistent with that of the moving iron core.

[0125] In some embodiments, see Figure 4 and Figure 5 The body 13 is formed with a connecting flow path 134 communicating with the second flow channel 132, and the switching member 15 includes a switching column 151, a first blocking block 152 and a second blocking block 153, the first blocking block 152 and the second blocking block 153 are both connected to the switching column 151, and the switching column 151 is connected to the driving member 141;

[0126] In the first position, the first blocking block 152 disconnects the first flow channel 131 and the connecting flow path 134 , and in the second position, the second blocking block 153 disconnects the third flow channel 133 and the connecting flow path 134 .

[0127] It can be understood that the switching column 151 is connected to the position adjustment component 14, and the switching column 151 is driven to move by the position adjustment component 14, and the first blocking block 152 and the second blocking block 153 connected to the switching column 151 will move accordingly, so that the first blocking block 152 can be moved to a position blocking the first flow channel 131 and the connecting flow channel 134, so as to disconnect the first flow channel 131 and the connecting flow channel 134, so that the first flow channel 131 and the second flow channel 132 are disconnected, so that only the third flow channel 133 and the second flow channel 132 are connected in the two-position three-way valve at this time. The switching column 151 is driven to move by the position adjustment component 14, and the second blocking block 153 can also be moved to a position blocking the third flow channel 133 and the connecting flow channel 134, so as to disconnect the third flow channel 133 and the connecting flow channel 134, so that the third flow channel 133 and the second flow channel 132 are disconnected, so that only the first flow channel 131 and the second flow channel 132 are connected in the two-position three-way valve at this time. That is to say, by driving the first blocking block 152 and the second blocking block 153 to move, the two-position three-way valve can be switched between the first position and the second position.

[0128] The first blocking block 152 and the second blocking block 153 are connected to the switching column 151 at the same time, so that the first blocking block 152 and the second blocking block 153 can move at the same time, thereby avoiding the situation where the three flow channels of the two-position three-way valve are connected at the same time due to the asynchronous movement of the first blocking block 152 and the second blocking block 153.

[0129] It can be understood that the first flow channel 131, the second flow channel 132 and the third flow channel 133 are sequentially arranged along the length direction of the connecting flow channel 134. The switching column 151 is movably arranged on the connecting flow channel 134, and the position adjustment component 14 drives the switching column 151 to move at the connecting flow channel 134, so that the two-position three-way valve can be switched between the first position and the second position.

[0130] The position adjustment component 14 drives the switching column 151 to move in the first direction along the connecting flow path 134, so that the two-position three-way valve is in the first position. At this time, the hydraulic oil flows along the second flow channel 132 and the third flow channel 133. At this time, the direction of the pressure applied by the hydraulic oil to the first blocking block 152 and the switching column 151 is also the first direction, which can keep the first blocking block 152 in the position of disconnecting the first flow channel 131 and the connecting flow path 134, thereby preventing the hydraulic oil from leaking into the first flow channel 131.

[0131] The position adjustment component 14 drives the switching column 151 to move in the second direction along the connecting flow path 134, so that the two-position three-way valve is in the second position. At this time, the hydraulic oil flows along the second flow channel 132 and the first flow channel 131. At this time, the direction of the pressure applied by the hydraulic oil to the second blocking block 153 and the switching column 151 is also the second direction, which can keep the second blocking block 153 in the position of disconnecting the third flow channel 133 and the connecting flow path 134, thereby preventing the hydraulic oil from leaking into the third flow channel 133.

[0132] It is understandable that when the third switching valve 8 is a two-position three-way valve, when the third switching valve 8 fails to be powered off, the first flow channel and the second flow channel of the third switching valve 8 are connected, the third flow channel and the second flow channel are disconnected, and the third flow channel is connected to the pressure providing device 7. When the vehicle is still trying to brake, the pressure providing device 7 will deliver hydraulic pressure to the third flow path 3. When the hydraulic pressure at the third flow path 3 is greater than the force of the reset member 142, the second blocking block 153 can be moved, so that the third flow path 133 and the connecting flow path 134 are connected, that is, the third flow path 133 and the second flow path 132 are connected again, so that the pressure providing device 7 is reconnected with the wheel cylinder, which can ensure that the braking force is still output stably on the one hand, and protect the electronic components and oil circuits on the other hand.

[0133] It can be understood that when the pressure providing device 7 fails, the third switching valve 8 can be placed in the fourth state and the fourth switching valve 12 can be placed in the sixth state to disconnect the second flow channel 132 and the third flow channel 133, thereby preventing the hydraulic oil from flowing through the third flow channel 133 to the pressure providing device 7 and causing insufficient braking force or insufficient power of the pressure providing device 7.

[0134] In some examples, different components of a two-position three-way valve can be assembled by riveting, which reduces the difficulty of processing.

[0135] In some examples, the first blocking block 152 and the second blocking block 153 are both integrally formed with the switching column 151 .

[0136] In some examples, the first blocking block 152 and the second blocking block 153 are, for example, spherical structures.

[0137] In some embodiments, see Figure 4 and Figure 5 The two-position three-way valve further includes a filter element 16 , and the filter element 16 is disposed at at least one of the first flow channel 131 , the second flow channel 132 and the third flow channel 133 .

[0138] It is understandable that the filter element 16 can filter the hydraulic oil flowing through the first flow channel 131 or the second flow channel 132 or the third flow channel 133 to remove particles in the hydraulic oil to ensure that the two-position three-way valve and the oil circuit control device can work stably and normally.

[0139] In some embodiments, see Figure 4 and Figure 5 The filter element 16 includes a mounting seat 161, a first filter screen 162 and a second filter screen 163. The first filter screen 162 and the second filter screen 163 are both mounted on the mounting seat 161. The first filter screen 162 and the second filter screen 163 are arranged in sequence along the flow direction of the hydraulic oil in the first flow channel 131, along the flow direction of the hydraulic oil in the second flow channel 132, or along the flow direction of the hydraulic oil in the third flow channel 133.

[0140] It can be understood that both the first filter 162 and the second filter 163 can filter particles in the hydraulic oil, thus achieving double filtration.

[0141] In some embodiments, the diameter of the filter holes of the first filter mesh 162 is greater than the diameter of the filter holes of the second filter mesh 163 .

[0142] It is understandable that the first filter screen 162 can first perform a coarse screen on the hydraulic oil, and then the second filter screen 163 can perform a fine screen on the hydraulic oil, thereby achieving effective filtration of particles in the hydraulic oil.

[0143] According to a second aspect of the present application, the present application provides a braking system, comprising the above-mentioned hydraulic circuit control device.

[0144] It can be understood that by making the first switching valve 5 and the second switching valve 6 be in the first state at the same time, the first switching valve 5 connects the first flow path 1 and the third flow path 3, and the second switching valve 6 connects the second flow path 2 and the fourth flow path 4, that is, at this time, the oil circuit of the left front wheel cylinder 11 is connected to the oil circuit of the right rear wheel cylinder 31, and the oil circuit of the right front wheel cylinder 21 is connected to the oil circuit of the left rear wheel cylinder 41, and a part of the hydraulic pressure output by the pressure providing device 7 is transmitted to the left front wheel cylinder 11 and the right rear wheel cylinder 31, and the other part of the hydraulic pressure is transmitted to the right front wheel cylinder 21 and the left rear wheel cylinder 41.

[0145] By making the first switching valve 5 and the second switching valve 6 be in the second state at the same time, the first switching valve 5 is connected to the first flow path 1 and the second flow path 2, and the second switching valve 6 is connected to the third flow path 3 and the fourth flow path 4, that is, at this time, the oil circuit of the left front wheel cylinder 11 is connected to the oil circuit of the right front wheel cylinder 21, and the oil circuit of the right rear wheel cylinder 31 is connected to the oil circuit of the left rear wheel cylinder 41, and a part of the hydraulic pressure output by the pressure providing device 7 is transmitted to the left front wheel cylinder 11 and the right front wheel cylinder 21, and the other part of the hydraulic pressure is transmitted to the right rear wheel cylinder 31 and the left rear wheel cylinder 41.

[0146] That is to say, when the first switching valve 5 and the second switching valve 6 are in different states, the hydraulic flow direction of the hydraulic circuit control device is different. Then, by controlling the state switching of the first switching valve 5 and the second switching valve 6, the switching of the hydraulic circuit can be realized, so that the hydraulic circuit control device includes at least two hydraulic circuits.

[0147] According to a third aspect of the present application, the present application provides a vehicle comprising the above-mentioned braking system.

[0148] It can be understood that by making the first switching valve 5 and the second switching valve 6 be in the first state at the same time, the first switching valve 5 connects the first flow path 1 and the third flow path 3, and the second switching valve 6 connects the second flow path 2 and the fourth flow path 4, that is, at this time, the oil circuit of the left front wheel cylinder 11 is connected to the oil circuit of the right rear wheel cylinder 31, and the oil circuit of the right front wheel cylinder 21 is connected to the oil circuit of the left rear wheel cylinder 41, and a part of the hydraulic pressure output by the pressure providing device 7 is transmitted to the left front wheel cylinder 11 and the right rear wheel cylinder 31, and the other part of the hydraulic pressure is transmitted to the right front wheel cylinder 21 and the left rear wheel cylinder 41.

[0149] By making the first switching valve 5 and the second switching valve 6 be in the second state at the same time, the first switching valve 5 is connected to the first flow path 1 and the second flow path 2, and the second switching valve 6 is connected to the third flow path 3 and the fourth flow path 4, that is, at this time, the oil circuit of the left front wheel cylinder 11 is connected to the oil circuit of the right front wheel cylinder 21, and the oil circuit of the right rear wheel cylinder 31 is connected to the oil circuit of the left rear wheel cylinder 41, and a part of the hydraulic pressure output by the pressure providing device 7 is transmitted to the left front wheel cylinder 11 and the right front wheel cylinder 21, and the other part of the hydraulic pressure is transmitted to the right rear wheel cylinder 31 and the left rear wheel cylinder 41.

[0150] That is to say, when the first switching valve 5 and the second switching valve 6 are in different states, the hydraulic flow direction of the hydraulic circuit control device is different. Then, by controlling the state switching of the first switching valve 5 and the second switching valve 6, the switching of the hydraulic circuit can be realized, so that the hydraulic circuit control device includes at least two hydraulic circuits.

[0151] In some examples, the vehicle may be a fuel vehicle, a plug-in hybrid vehicle, or a new energy vehicle, etc., and this application does not make specific limitations on this.

[0152] According to the fourth aspect of this application, refer to Figure 6 , the present application provides a control method, comprising:

[0153] Step 100: Obtaining vehicle driving information;

[0154] Step 200 : Control the states of the first switching valve 5 and the second switching valve 6 based on the driving information of the vehicle.

[0155] It can be understood that the first switching valve 5 and the second switching valve 6 are controlled to switch between the first state and the second state according to the driving information of the vehicle, and the hydraulic circuits of the hydraulic circuit control device corresponding to the different states of the first switching valve 5 and the second switching valve 6 are different, that is, the hydraulic circuit can be adjusted according to the driving information of the vehicle, so that the hydraulic circuit can be more adapted to the current driving conditions of the vehicle, thereby improving the driving safety of the vehicle, providing more diversified options for braking the vehicle, and enriching the control strategy of the vehicle.

[0156] It is understandable that with the development of autonomous driving technology, the braking system is gradually separated from manual braking, and the car needs to make reasonable braking decisions according to the actual working conditions. The hydraulic circuit in the related technology is relatively simple and cannot meet the safety requirements of autonomous driving braking control. However, this application controls the state of the first switching valve 5 and the second switching valve 6 according to the driving information of the vehicle, so that the hydraulic circuit matches the current vehicle driving conditions, improves the vehicle driving safety, and can provide more diversified control strategies.

[0157] In some examples, the vehicle driving information includes whether the vehicle is in a turning state, whether the vehicle is in a U-turn state, whether the vehicle is in a straight-line driving state, whether the vehicle is in an emergency braking state, etc.

[0158] In some embodiments, the fluid circuit control device further includes a third switching valve 8 and a master cylinder 9, the third switching valve 8 is connected between the pressure providing device 7 and the first switching valve 5, and the third switching valve 8 is connected to the master cylinder 9;

[0159] The control method also includes:

[0160] When the pressure supply device 7 is in a faulty state, the third switching valve 8 is controlled to connect the first switching valve 5 and the master cylinder 9 .

[0161] It is understandable that when the pressure providing device 7 fails, it means that the pressure providing device 7 can no longer increase the hydraulic pressure of the wheel cylinder. At this time, the third switching valve 8 is controlled to connect the first switching valve 5 and the master cylinder 9, so that the two wheel cylinders connected to the first switching valve 5 can be directly connected to the master cylinder 9. When the brake pedal is stepped on, the hydraulic oil in the master cylinder 9 can flow to the two wheel cylinders connected to the first switching valve 5, realizing mechanical braking and avoiding direct loss of braking force.

[0162] It is understandable that the hydraulic oil output by the pressure providing device 7 will be transmitted to the two wheel cylinders connected to the first switching valve 5. When the pressure providing device 7 suddenly fails in the process of outputting pressure, the hydraulic oil output by the pressure providing device 7 will remain in the two wheel cylinders connected to the first switching valve 5. At this time, the third switching valve 8 can be controlled to connect the first switching valve 5 and the master cylinder 9, so that the hydraulic oil in the two wheel cylinders connected to the first switching valve 5 can return to the oil storage member 10 through the oil hole of the master cylinder 9, ensuring that in the case of a failure of the pressure providing device 7, the hydraulic oil in the two wheel cylinders connected to the first switching valve 5 can return to the oil storage member 10.

[0163] It can be understood that when the third switching valve 8 is connected to the first switching valve 5 and the master cylinder 9, it means that the third switching valve 8 is in the fourth state, that is, the second flow channel 132 and the third flow channel 133 are disconnected, which can prevent the hydraulic oil from flowing through the third flow channel 133 to the pressure providing device 7 and causing insufficient braking force or insufficient power of the pressure providing device 7.

[0164] In some embodiments, the control method further includes: controlling the first switching valve 5 to be in the second state.

[0165] It is understandable that when the pressure providing device 7 fails, due to inertia, the pressure of the front wheels of the vehicle on the ground is relatively large, so the first switching valve 5 is controlled to be in the second state, so that the first switching valve 5 connects the oil circuit of the left front wheel cylinder 11 and the oil circuit of the right front wheel cylinder 21, so that the oil circuit of the left front wheel cylinder 11 and the oil circuit of the right front wheel cylinder 21 are both connected to the master cylinder 9, and the hydraulic oil in the master cylinder 9 can flow to the left front wheel cylinder 11 and the right front wheel cylinder 21, thereby achieving braking of the two front wheels of the vehicle.

[0166] In some embodiments, the fluid circuit control device further includes a fourth switching valve 12 and an oil storage member 10, wherein the fourth switching valve 12 is connected between the pressure providing device 7 and the second switching valve 6, and the fourth switching valve 12 is connected to the oil storage member 10;

[0167] The control method further includes: controlling the fourth switching valve 12 to connect the oil storage member 10 and the second switching valve 6 .

[0168] It is understandable that the hydraulic oil output by the pressure providing device 7 will be transmitted to the two wheel cylinders connected to the second switching valve 6. When the pressure providing device 7 suddenly fails in the process of outputting pressure, the hydraulic oil output by the pressure providing device 7 will remain in the two wheel cylinders connected to the second switching valve 6. At this time, the fourth switching valve 12 can be controlled to connect the second switching valve 6 and the oil storage member 10, so that the hydraulic oil in the two wheel cylinders connected to the second switching valve 6 can return to the oil storage member 10, ensuring that in the case of a failure of the pressure providing device 7, the hydraulic oil in the two wheel cylinders connected to the second switching valve 6 can return to the oil storage member 10.

[0169] It can be understood that when the fourth switching valve 12 is connected to the oil storage part 10 and the second switching valve 6, it means that the fourth switching valve 12 is in the sixth state, that is, the second flow channel 132 and the third flow channel 133 are disconnected, which can prevent the hydraulic oil from flowing through the third flow channel 133 to the pressure providing device 7 and causing insufficient braking force or insufficient power of the pressure providing device 7.

[0170] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0171] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0172] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0173] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A fluid circuit control device, characterized in that: include: A first flow path, adapted to be connected to an oil path of a left front wheel cylinder; A second flow path, adapted to be connected to the oil path of the right front wheel cylinder; A third flow path, adapted to be connected to the oil path of the right rear wheel cylinder; A fourth flow path, adapted to be connected to the oil path of the left rear wheel cylinder; The first switching valve and the second switching valve are used to receive the hydraulic pressure output by the pressure providing device, and both can be switched between a first state and a second state; In the first state, the first switching valve connects the first flow path and the third flow path, and the second switching valve connects the second flow path and the fourth flow path. In the second state, the first switching valve connects the first flow path and the second flow path, and the second switching valve connects the third flow path and the fourth flow path.

2. The fluid circuit control device according to claim 1, characterized in that: The second flow channel of the first switching valve and the second flow channel of the first switching valve are both used to receive the hydraulic pressure output by the pressure providing device; The first flow passage of the first switching valve is connected to the second flow passage, the third flow passage of the first switching valve is connected to the third flow passage, and the second flow passage of the first switching valve is connected to the first flow passage; The first flow passage of the second switching valve is connected to the third flow passage, the third flow passage of the second switching valve is connected to the second flow passage, and the second flow passage of the second switching valve is connected to the fourth flow passage; In the first state, the second flow channel and the third flow channel of the first switching valve are connected, and the second flow channel and the third flow channel of the second switching valve are connected. In the second state, the first flow channel and the second flow channel of the first switching valve are connected, and the first flow channel and the second flow channel of the second switching valve are connected.

3. The fluid circuit control device according to claim 1, characterized in that: The liquid circuit control device also includes a third switching valve, a third flow channel of the third switching valve is connected to the output port of the pressure providing device, and the first flow path and the first switching valve are both connected to the second flow channel of the third switching valve.

4. The fluid circuit control device according to claim 3, characterized in that: The fluid circuit control device further includes a master cylinder, and the first flow channel of the third switching valve is connected to the master cylinder; The third switching valve can be switched between a third state and a fourth state. In the third state, the second flow channel and the third flow channel of the third switching valve are connected. In the fourth state, the first flow channel and the second flow channel of the third switching valve are connected.

5. The fluid circuit control device according to claim 4, characterized in that: The hydraulic circuit control device further comprises an oil storage member, the master cylinder is provided with an oil hole, and the oil hole is communicated with the oil storage member.

6. The fluid circuit control device according to claim 3, characterized in that: The liquid circuit control device also includes a fourth switching valve, a third flow channel of the fourth switching valve is connected to the output port of the pressure providing device, and the fourth flow path and the second switching valve are both connected to the second flow channel of the fourth switching valve.

7. The fluid circuit control device according to claim 6, characterized in that: The fluid circuit control device further includes an oil storage component, and the first flow channel of the fourth switching valve is connected to the oil storage component; The fourth switching valve can be switched between a fifth state and a sixth state. In the fifth state, the second flow channel and the third flow channel of the fourth switching valve are connected. In the sixth state, the first flow channel and the second flow channel of the fourth switching valve are connected.

8. The fluid circuit control device according to claim 6, characterized in that: The first switching valve and the second switching valve are both two-position three-way valves; and / or the third switching valve and the fourth switching valve are both two-position three-way valves.

9. The fluid circuit control device according to claim 8, characterized in that: The two-position three-way valve comprises a body, a position adjustment component and a switching element. The body is formed with a first flow channel, a second flow channel and a third flow channel; The position adjustment component and the switching member are both installed on the body, the position adjustment component is connected to the switching member, and the position adjustment component is used to drive the switching member to move so that the two-position three-way valve switches between the first position and the second position; In the first position, the second flow channel of the body is communicated with the third flow channel of the body, and in the second position, the first flow channel of the body is communicated with the second flow channel of the body.

10. The fluid circuit control device according to claim 9, characterized in that: The position adjustment assembly includes a driving member and a reset member, both of which are mounted on the body, and both of which are connected to the switching member; The driving member is used to drive the switching member to move so that the two-position three-way valve switches from the second position to the first position; The reset member is used to drive the switching member to reset, so that the two-position three-way valve is switched from the first position to the second position.

11. The fluid path control device according to claim 10, characterized in that: The body is formed with a connecting flow path communicating with the second flow channel, the switching member includes a switching column, a first blocking block and a second blocking block, the first blocking block and the second blocking block are both connected to the switching column, and the switching column is connected to the driving member; Wherein, in the first position, the first blocking block disconnects the first flow channel and the connecting flow path, and in the second position, the second blocking block disconnects the third flow channel and the connecting flow path.

12. The fluid path control device according to any one of claims 8 to 11, characterized in that: The two-position three-way valve further includes a filter element, and the filter element is disposed at at least one of the first flow channel, the second flow channel, and the third flow channel.

13. The fluid path control device according to claim 12, characterized in that: The filter element includes a mounting seat, a first filter screen and a second filter screen. The first filter screen and the second filter screen are both mounted on the mounting seat. The first filter screen and the second filter screen are arranged in sequence along the flow direction of the hydraulic oil in the first flow channel, along the flow direction of the hydraulic oil in the second flow channel, or along the flow direction of the hydraulic oil in the third flow channel.

14. The fluid circuit control device according to claim 13, characterized in that: The diameter of the filter holes of the first filter screen is greater than the diameter of the filter holes of the second filter screen.

15. A braking system, characterized in that: It comprises the fluid circuit control device as claimed in claims 1 to 14.

16. A vehicle, characterized in that: Comprising a braking system as claimed in claim 15.

17. A control method, characterized in that: Applied to the fluid circuit control device according to claim 1, the control method comprises: Obtain vehicle driving information; Based on the driving information of the vehicle, the states of the first switching valve and the second switching valve are controlled.

18. The control method according to claim 17, characterized in that: The fluid circuit control device further includes a third switching valve and a master cylinder, wherein the third switching valve is connected between the pressure providing device and the first switching valve, and the third switching valve is connected to the master cylinder; The control method further comprises: When the pressure supply device is in a faulty state, the third switching valve is controlled to connect the first switching valve and the master cylinder.

19. The control method according to claim 18, characterized in that: The control method further includes: controlling the first switching valve to be in the second state.

20. The control method according to claim 17, characterized in that: The fluid circuit control device further includes a fourth switching valve and an oil storage member, wherein the fourth switching valve is connected between the pressure providing device and the second switching valve, and the fourth switching valve is connected to the oil storage member; The control method further includes: controlling the fourth switching valve to connect the oil reservoir and the second switching valve.

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