Hydraulic braking system and vehicle

Abstract

The utility model provides a hydraulic brake system and a vehicle, and the hydraulic brake system comprises a pedal, a main cylinder, a pedal simulator, a flow pump, a pressure regulating valve, a piston pump and at least one wheel brake cylinder; when the pedal drives a piston of the main cylinder to move, the piston pump is used for conveying oil liquid to an oil cavity of a wheel brake cylinder in a pressurized mode, when the piston pump loses efficacy, the flow pump is used for conveying oil liquid to an oil cavity of the piston pump in a pressurized mode, and the pressure adjusting valve is used for adjusting the oil cavity pressure of the piston pump. The oil cavity of the main cylinder is used for pressurizing and conveying oil to the oil cavity of the wheel brake cylinder. According to the hydraulic braking system and the vehicle, under the condition that the main braking module fails, the first redundant braking module and the second redundant braking module can be used for executing the braking instruction, so that the requirement for efficient braking is met, the first redundant braking module only relates to the pressure regulating valve and the flow pump, the overall structure is simple, and the cost is low.

Description

Technical Field

[0001] The present disclosure relates to the technical field of hydraulic brakes, and in particular to a hydraulic brake system and a vehicle. Background Art

[0002] With the rapid development of vehicle autonomous driving, the requirements for the braking system are getting higher and higher. Each braking system needs to have a primary braking module and a backup first redundant braking module at the same time, so that in the event of failure of the primary braking module, the first redundant braking module can be used to execute the braking command. However, the current first redundant braking module has a relatively complex structure and high cost, which makes it difficult to meet the braking requirements of high efficiency and low cost. Summary of the invention

[0003] The present disclosure aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, an object of the present disclosure is to provide a hydraulic brake system and a vehicle.

[0005] To achieve the above-mentioned purpose, the first aspect of the present disclosure provides a hydraulic brake system, comprising: a pedal, a master cylinder, a pedal simulator, a flow pump, a pressure regulating valve, a piston pump and at least one wheel brake cylinder; wherein the pedal is connected to the piston of the master cylinder by transmission, and the oil chamber of the master cylinder is connected to the oil chamber of at least one wheel brake cylinder, and the oil chamber of the pedal simulator is connected to the oil chamber of the master cylinder; the liquid outlet end of the flow pump is connected to the liquid inlet end of the oil chamber of the piston pump, and the liquid inlet end of the pressure regulating valve is connected to the liquid outlet end of the oil chamber of the piston pump, and the oil chamber of the piston pump is connected to the oil chamber of at least one wheel brake cylinder; when the pedal drives the piston of the master cylinder to move, the piston pump is used to pressurize and deliver oil to the oil chamber of the wheel brake cylinder, and when the piston pump fails, the flow pump is used to pressurize and deliver oil to the oil chamber of the piston pump, and the pressure regulating valve is used to adjust the oil chamber pressure of the piston pump, and when the piston pump and the flow pump fail, the oil chamber of the master cylinder is used to pressurize and deliver oil to the oil chamber of the wheel brake cylinder.

[0006] Optionally, the hydraulic braking system also includes: at least one first isolation valve, which is arranged between the oil chamber of the piston pump and the oil chamber of the wheel brake cylinder, and the first end of the first isolation valve is connected to the oil chamber of the piston pump, and the second end of the first isolation valve is connected to the oil chamber of at least one wheel brake cylinder, and the first isolation valve is turned on after being energized.

[0007] Optionally, the hydraulic brake system also includes: a displacement sensor, the detection end of which is connected to the piston of the master cylinder, and the displacement sensor is used to detect the displacement of the master cylinder piston; and / or an angle sensor, the detection end of which is connected to the pedal, and the angle sensor is used to detect the angle of the pedal.

[0008] Optionally, the hydraulic braking system also includes: at least one second isolation valve, which is arranged between the oil chamber of the master cylinder and the oil chamber of the wheel brake cylinder, and the first end of the second isolation valve is connected to the oil chamber of the master cylinder, and the second end of the second isolation valve is connected to the oil chamber of at least one wheel brake cylinder, and the second isolation valve is cut off after being energized.

[0009] Optionally, the hydraulic braking system also includes: a third isolating valve, which is arranged between the oil chamber of the pedal simulator and the oil chamber of the master cylinder, and the first end of the third isolating valve is connected to the oil chamber of the master cylinder, and the second end of the third isolating valve is connected to the oil chamber of the pedal simulator, and the third isolating valve is turned on after being energized.

[0010] Optionally, the hydraulic braking system also includes: at least one fourth isolation valve, which is arranged between the second end of the first isolation valve and the oil chamber of the wheel brake cylinder and between the second end of the second isolation valve and the oil chamber of the wheel brake cylinder, and the first end of the fourth isolation valve is respectively connected to the second end of the first isolation valve and the second end of the second isolation valve, the second end of the fourth isolation valve is connected to the oil chamber of the wheel brake cylinder, and the fourth isolation valve is cut off after being energized.

[0011] Optionally, the hydraulic brake system further includes: at least one fifth isolation valve, a first end of the fifth isolation valve being connected to the oil chamber of the wheel brake cylinder, and a second end of the fifth isolation valve discharging oil, and the fifth isolation valve being turned on after being energized.

[0012] Optionally, the hydraulic braking system also includes: a first one-way valve, which is arranged between the second end of the first isolation valve and the oil chamber of the wheel brake cylinder and between the second end of the second isolation valve and the oil chamber of the wheel brake cylinder, and the fluid inlet end of the first one-way valve is connected to the oil chamber of the wheel brake cylinder, and the fluid outlet end of the first one-way valve is respectively connected to the second end of the first isolation valve and the second end of the second isolation valve.

[0013] Optionally, the hydraulic brake system further includes: a pressure sensor, a detection end of the pressure sensor is connected to the oil chamber of the piston pump, and the pressure sensor is used to detect the pressure of the oil chamber of the piston pump.

[0014] Optionally, the hydraulic brake system further includes: a second one-way valve, the fluid inlet end of the second one-way valve is connected to the oil, and the fluid outlet end of the second one-way valve is connected to the fluid inlet end of the oil chamber of the piston pump.

[0015] Optionally, the hydraulic braking system also includes: a third one-way valve, which is arranged between the fluid outlet end of the flow pump and the fluid inlet end of the oil chamber of the piston pump, and the fluid inlet end of the third one-way valve is connected to the fluid outlet end of the flow pump, and the fluid outlet end of the third one-way valve is connected to the fluid inlet end of the oil chamber of the piston pump.

[0016] Optionally, the at least one wheel brake cylinder includes: a first brake cylinder, a second brake cylinder, a third brake cylinder and a fourth brake cylinder, and the oil chamber of the piston pump is respectively connected to the oil chamber of the first brake cylinder, the oil chamber of the second brake cylinder, the oil chamber of the third brake cylinder and the oil chamber of the fourth brake cylinder.

[0017] A second aspect of the present disclosure provides a vehicle, comprising: at least one wheel; and a hydraulic brake system as provided in the first aspect of the present disclosure, wherein a wheel brake cylinder of the hydraulic brake system is transmission-connected to the wheel, and the wheel brake cylinder is used for braking the wheel.

[0018] The technical solution provided by the present disclosure may have the following beneficial effects:

[0019] By setting the piston pump, a main brake module of the hydraulic brake system is formed, by setting the pressure regulating valve and the flow pump, a first redundant brake module of the hydraulic brake system is formed, and by setting the master cylinder and the pedal, a second redundant brake module of the hydraulic brake system is formed. In the event of failure of the main brake module, the first redundant brake module can be used to execute the braking command, and in the event of failure of the main brake module and the first redundant brake module, the second redundant brake module can be used to execute the braking command, thereby meeting the demand for efficient braking, and the first redundant brake module only involves the pressure regulating valve and the flow pump, the overall structure is simple and the cost is low, thereby meeting the demand for high-efficiency and low-cost braking.

[0020] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present disclosure will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is a structural schematic diagram of a hydraulic brake system proposed in an embodiment of the present disclosure;

[0023] As shown in the figure: 1. flow pump, 2. pressure regulating valve, 3. piston pump, 4. first isolation valve, 5. second isolation valve, 6. third isolation valve, 7. fourth isolation valve, 8. fifth isolation valve, 9. master cylinder, 10. pedal, 11. displacement sensor, 12. angle sensor, 13. pedal simulator, 14. first one-way valve, 15. second one-way valve, 16. third one-way valve, 17. pressure sensor, 18. first brake cylinder, 19. second brake cylinder, 20. third brake cylinder, 21. fourth brake cylinder, 22. oil pot, 23. push rod assembly. DETAILED DESCRIPTION

[0024] Embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and are not to be construed as limitations of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications, and equivalents that fall within the spirit and connotation of the appended claims.

[0025] like Figure 1 As shown, the embodiment of the present disclosure proposes a hydraulic braking system, including: a pedal 10, a master cylinder 9, a pedal simulator 13, a flow pump 1, a pressure regulating valve 2, a piston pump 3 and at least one wheel brake cylinder; wherein, the pedal 10 is connected to the piston transmission of the master cylinder 9, and the oil chamber of the master cylinder 9 is connected to the oil chamber of at least one wheel brake cylinder, the oil chamber of the pedal simulator 13 is connected to the oil chamber of the master cylinder 9, the liquid outlet end of the flow pump 1 is connected to the liquid inlet end of the oil chamber of the piston pump 3, and the liquid inlet end of the pressure regulating valve 2 is connected to the liquid outlet end of the oil chamber of the piston pump 3, and the oil chamber of the piston pump 3 is connected to the oil chamber of at least one wheel brake cylinder.

[0026] When the pedal 10 drives the piston of the master cylinder 9 to move, the piston pump 3 is used to pressurize and deliver oil to the oil chamber of the wheel brake cylinder, and when the piston pump 3 fails, the flow pump 1 is used to pressurize and deliver oil to the oil chamber of the piston pump 3, and the pressure regulating valve 2 is used to adjust the oil chamber pressure of the piston pump 3. When the piston pump 3 and the flow pump 1 fail, the oil chamber of the master cylinder 9 is used to pressurize and deliver oil to the oil chamber of the wheel brake cylinder.

[0027] It can be understood that, since the oil chamber of the piston pump 3 is connected to the oil chamber of at least one wheel brake cylinder, after the piston pump 3 is turned on, it can pressurize and deliver oil to the oil chamber of at least one wheel brake cylinder according to a preset pressure, thereby utilizing the wheel brake cylinder to achieve wheel braking; and, when the piston pump 3 fails, since the outlet end of the flow pump 1 is connected to the inlet end of the oil chamber of the piston pump 3, and the inlet end of the pressure regulating valve 2 is connected to the outlet end of the oil chamber of the piston pump 3, the flow pump 1 can pressurize and deliver oil to the oil chamber of the piston pump 3, and at the same time utilize The pressure regulating valve 2 adjusts the oil chamber pressure of the piston pump 3, thereby utilizing the oil chamber of the piston pump 3 to pressurize and deliver oil to the oil chamber of at least one wheel brake cylinder according to a preset pressure, thereby utilizing the wheel brake cylinder to brake the wheel; when the piston pump 3 and the flow pump 1 fail, since the oil chamber of the master cylinder 9 is connected to the oil chamber of the wheel brake cylinder, and the pedal 10 is connected to the piston transmission of the master cylinder 9, the master cylinder 9 can be driven by the pedal 10 to pressurize and deliver oil to the oil chamber of at least one wheel brake cylinder, thereby utilizing the wheel brake cylinder to brake the wheel.

[0028] Therefore, through the setting of the piston pump 3, a main brake module of the hydraulic brake system is formed, through the setting of the pressure regulating valve 2 and the flow pump 1, a first redundant brake module of the hydraulic brake system is formed, and through the setting of the master cylinder 9 and the pedal 10, a second redundant brake module of the hydraulic brake system is formed. In the event of failure of the main brake module, the first redundant brake module can be used to execute the braking command, and in the event of failure of the main brake module and the first redundant brake module, the second redundant brake module can be used to execute the braking command, thereby meeting the demand for efficient braking, and the first redundant brake module only involves the pressure regulating valve 2 and the flow pump 1, the overall structure is simple and the cost is low, thereby meeting the demand for high-efficiency and low-cost braking.

[0029] It should be noted that the master cylinder 9 is used to pressurize and deliver oil to the oil chamber of the wheel brake cylinder under the drive of the pedal 10. The specific type of the master cylinder 9 can be set according to actual needs and is not limited to this. For example, the master cylinder 9 includes: a cylinder, a first spring, a first piston, a second spring and a second piston. The first spring, the first piston, the second spring and the second piston are sequentially arranged in the oil chamber of the cylinder, and the first piston and the second piston divide the oil chamber of the cylinder into a first chamber and a second chamber. The second piston is connected to the pedal 10 through a push rod assembly 23. The pedal 10 is stepped on and drives the second piston to move in a direction close to the first piston. The pedal 10 is released and drives the second piston to move in a direction away from the first piston under the action of the first spring and the second spring. Among them, the oil inlet end of the first chamber is fed with oil, and the oil outlet end of the first chamber can realize pressure monitoring by using a sensor, and the oil inlet end of the second chamber is fed with oil, and the oil inlet end of the second chamber can be provided with a one-way valve or an isolation valve, so as to realize the sealing self-check of the master cylinder 9 by using the isolation valve.

[0030] The pedal 10 is used to drive the piston of the master cylinder 9 to move under the force of the driver. The specific type of the pedal 10 can be set according to actual needs and is not limited to this. Among them, the top of the pedal 10 is rotatably set on the support member, the middle part of the pedal 10 is connected to the second piston of the master cylinder 9 by the push rod assembly 23, and the bottom of the pedal 10 is used for the driver's foot.

[0031] The pedal simulator 13 can use oil to provide pressure feedback for the pedal 10, thereby making the braking of the hydraulic brake system more precise and convenient. When the pedal 10 is stepped on at a greater angle, the pressure fed back by the pedal simulator 13 is greater. When the pedal 10 is stepped on at a smaller angle, the pressure fed back by the pedal simulator 13 is smaller. The specific type of the pedal simulator 13 can be set according to actual needs and is not limited to this.

[0032] The flow pump 1 is used to pressurize and deliver oil to the oil chamber of the piston pump 3 when the piston pump 3 fails due to a malfunction or other reasons, so as to achieve braking using the wheel brake cylinder. The specific type of the flow pump 1 can be set according to actual needs and is not limited to this.

[0033] The pressure regulating valve 2 can also be called a pressure regulating valve, a self-balancing valve, a dynamic balancing valve, etc. It is used to adjust the pressure of the oil chamber of the piston pump 3 when the piston pump 3 fails due to a fault or other reasons, so that the oil chamber pressure of the wheel brake cylinder is maintained at a preset pressure, thereby meeting the braking demand. The specific type of the pressure regulating valve 2 can be set according to actual needs and is not limited to this. Among them, using the pressure regulating valve 2 to achieve pressure control of the first redundant brake module is not only mature in technology, but also extremely low in cost, and can meet the braking needs of high efficiency and low cost.

[0034] The piston pump 3 is also called an electric reciprocating pump. The piston pump 3 is used to utilize the movement of the piston to achieve pressurized oil delivery. The specific type of the piston pump 3 can be set according to actual needs and is not limited to this. For example, the piston pump 3 includes: a brushless motor, a screw, a ball screw and a piston cylinder. The brushless motor is arranged on the piston cylinder, and the brushless motor is connected to the piston transmission of the piston cylinder through the screw. The brushless motor drives the screw to rotate forward and reverse to drive the piston to reciprocate in the oil chamber of the piston cylinder. At the same time, by controlling the rotation speed of the brushless motor, the pressure in the oil chamber can be adjusted.

[0035] Among them, since the oil chamber of the piston pump 3 is connected with the oil chamber of the wheel brake cylinder, when the piston of the piston pump 3 extends, the oil in the oil chamber of the piston pump 3 is pressurized and transported to the oil chamber of the wheel brake cylinder. When the piston of the piston pump 3 retracts, the oil in the oil chamber of the wheel brake cylinder is sucked into the oil chamber of the piston pump 3. Therefore, by controlling the piston of the piston pump 3, stable control of the wheel brake cylinder can be achieved.

[0036] The wheel brake cylinder is used to brake the wheel using oil with a preset pressure. The specific type of the wheel brake cylinder can be set according to actual needs and is not limited to this. For example, the wheel brake cylinder may include: a brake cylinder cover, a piston, a piston rod, a leather cup, a relief spring, etc.

[0037] The corresponding numbers of the piston pumps 3 and the wheel brake cylinders can be set according to actual needs, and there is no limitation on this. For example, one piston pump 3 can correspond to one wheel brake cylinder, or it can correspond to two, three, four, etc. wheel brake cylinders.

[0038] The oil is used for the wheel brake of the wheel brake cylinder, and the specific type of the oil can be arranged according to actual needs, without restriction. Wherein, the oil can be stored in the oil pot 22.

[0039] The hydraulic braking system can be automatically controlled by a control unit. For example, the output end of the control unit is connected to the input end of the pressure regulating valve 2, the input end of the flow pump 1 and the input end of the piston pump 3, respectively. The control unit is used to control the pressure regulating valve 2, the flow pump 1, the piston pump 3, etc. to achieve redundant braking of the hydraulic braking system.

[0040] like Figure 1 As shown, in some embodiments, the hydraulic braking system also includes: at least one first isolation valve 4, the first isolation valve 4 is arranged between the oil chamber of the piston pump 3 and the oil chamber of the wheel brake cylinder, and the first end of the first isolation valve 4 is connected to the oil chamber of the piston pump 3, the second end of the first isolation valve 4 is connected to the oil chamber of at least one wheel brake cylinder, and the first isolation valve 4 is connected after being energized.

[0041] It can be understood that, since the first isolation valve 4 is arranged between the oil chamber of the piston pump 3 and the oil chamber of the wheel brake cylinder, and the first isolation valve 4 is turned on after being energized, the first isolation valve 4 can conduct the passage between the oil chamber of the piston pump 3 and the oil chamber of the wheel brake cylinder after being energized, thereby ensuring that the piston pump 3 can pressurize and deliver oil to the oil chamber of the wheel brake cylinder, and the flow pump 1 can use the oil chamber of the piston pump 3 to pressurize and deliver oil to the oil chamber of the wheel brake cylinder, thereby using the wheel brake cylinder to meet the braking demand. Among them, the setting of the first isolation valve 4 makes the oil circuit control of the hydraulic brake system simpler and more convenient to use.

[0042] It should be noted that the first isolation valve 4 is an isolation valve used for on-off control of the passage between the oil chamber of the piston pump 3 and the oil chamber of the wheel brake cylinder. The specific type of the first isolation valve 4 can be set according to actual needs and is not limited to this.

[0043] like Figure 1As shown, in some embodiments, the hydraulic brake system also includes: a displacement sensor 11 and / or an angle sensor 12, the detection end of the displacement sensor 11 is connected to the piston of the master cylinder 9, the displacement sensor 11 is used to detect the displacement of the piston of the master cylinder 9, the detection end of the angle sensor 12 is connected to the pedal 10, and the angle sensor 12 is used to detect the angle of the pedal 10.

[0044] It can be understood that since the detection end of the displacement sensor 11 is connected to the piston of the master cylinder 9, the displacement sensor 11 can detect the displacement of the piston of the master cylinder 9, thereby facilitating the control of the piston pump 3, or the flow pump 1 and the pressure regulating valve 2 according to the displacement of the piston of the master cylinder 9, thereby meeting the braking requirements.

[0045] Since the detection end of the angle sensor 12 is connected to the pedal 10, the angle sensor 12 can detect the angle of the pedal 10, thereby facilitating the control of the piston pump 3, or the flow pump 1 and the pressure regulating valve 2 according to the angle of the pedal 10, thereby meeting the braking demand.

[0046] It should be noted that the displacement sensor 11 is used to detect the displacement of the second piston in the master cylinder 9, so as to determine the braking demand at the pedal 10 according to the displacement of the second piston in the master cylinder 9. The specific type of the displacement sensor 11 can be set according to actual needs and is not limited thereto. The output end of the displacement sensor 11 can be connected to the input end of the control unit, so as to realize the automatic control of the piston pump 3, or the flow pump 1 and the pressure regulating valve 2 by using the control unit.

[0047] The angle sensor 12 is used to detect the angle of the pedal 10, so as to determine the braking demand at the pedal 10 according to the angle of the pedal 10. The specific type of the angle sensor 12 can be set according to actual needs and is not limited thereto. The output end of the angle sensor 12 can be connected to the input end of the control unit, so as to realize the automatic control of the piston pump 3, or the flow pump 1 and the pressure regulating valve 2 by using the control unit.

[0048] When any one of the displacement sensor 11 and the angle sensor 12 detects a signal, the piston pump 3, or the flow pump 1 and the pressure regulating valve 2 are controlled according to the signal. That is to say, the displacement sensor 11 and the angle sensor 12 are designed to be redundant.

[0049] like Figure 1 As shown, in some embodiments, the hydraulic braking system also includes: at least one second isolation valve 5, the second isolation valve 5 is arranged between the oil chamber of the master cylinder 9 and the oil chamber of the wheel brake cylinder, and the first end of the second isolation valve 5 is connected to the oil chamber of the master cylinder 9, the second end of the second isolation valve 5 is connected to the oil chamber of at least one wheel brake cylinder, and the second isolation valve 5 is cut off after being energized.

[0050] It can be understood that, since the second isolation valve 5 is arranged between the oil chamber of the master cylinder 9 and the oil chamber of the wheel brake cylinder, and the second isolation valve 5 is cut off after being energized, the passage between the oil chamber of the master cylinder 9 and the oil chamber of the wheel brake cylinder can be opened after the second isolation valve 5 loses power, thereby ensuring that the master cylinder 9 can pressurize and deliver oil to the oil chamber of the wheel brake cylinder under the drive of the pedal 10, and then the wheel brake cylinder is used to meet the braking demand. Among them, the arrangement of the second isolation valve 5 makes the oil circuit control of the hydraulic brake system simpler and more convenient to use.

[0051] It should be noted that the second isolation valve 5 is an isolation valve used for on-off control of the passage between the second oil chamber of the master cylinder 9 and the oil chamber of the wheel brake cylinder. The specific type of the second isolation valve 5 can be set according to actual needs and is not limited to this.

[0052] like Figure 1 As shown, in some embodiments, the hydraulic braking system also includes: a third isolation valve 6, which is arranged between the oil chamber of the pedal simulator 13 and the oil chamber of the master cylinder 9, and the first end of the third isolation valve 6 is connected to the oil chamber of the master cylinder 9, and the second end of the third isolation valve 6 is connected to the oil chamber of the pedal simulator 13, and the third isolation valve 6 is turned on after being energized.

[0053] It can be understood that since the first end of the third isolation valve 6 is connected to the oil chamber of the master cylinder 9, and the second end of the third isolation valve 6 is connected to the oil chamber of the pedal simulator 13, the third isolation valve 6 is turned on after being energized, so that the third isolation valve 6 can conduct the passage between the oil chamber of the master cylinder 9 and the oil chamber of the pedal simulator 13 after being energized, so that the pedal simulator 13 can use oil to provide pressure feedback for the pedal 10, thereby making the braking of the hydraulic brake system more precise and convenient.

[0054] It should be noted that the third isolation valve 6 is an isolation valve used for on-off control of the passage between the second oil chamber of the master cylinder 9 and the oil chamber of the pedal simulator 13. The specific type of the third isolation valve 6 can be set according to actual needs and is not limited to this.

[0055] like Figure 1 As shown, in some embodiments, the hydraulic braking system also includes: at least one fourth isolation valve 7, which is arranged between the second end of the first isolation valve 4 and the oil chamber of the wheel brake cylinder and between the second end of the second isolation valve 5 and the oil chamber of the wheel brake cylinder, and the first end of the fourth isolation valve 7 is respectively connected to the second end of the first isolation valve 4 and the second end of the second isolation valve 5, and the second end of the fourth isolation valve 7 is connected to the oil chamber of the wheel brake cylinder, and the fourth isolation valve 7 is cut off after being energized.

[0056] It can be understood that, since the fourth isolation valve 7 is arranged between the second end of the first isolation valve 4 and the oil chamber of the wheel brake cylinder and between the second end of the second isolation valve 5 and the oil chamber of the wheel brake cylinder, and the fourth isolation valve 7 is cut off after being energized, the passage between the oil chamber of the piston pump 3 and the oil chamber of the wheel brake cylinder, and the passage between the oil chamber of the master cylinder 9 and the oil chamber of the pedal simulator 13 can be conducted after the fourth isolation valve 7 loses power, thereby ensuring that the piston pump 3 can pressurize and deliver oil to the oil chamber of the wheel brake cylinder, the flow pump 1 can use the oil chamber of the piston pump 3 to pressurize and deliver oil to the oil chamber of the wheel brake cylinder, and the master cylinder 9 can pressurize and deliver oil to the oil chamber of the wheel brake cylinder under the drive of the pedal 10, thereby using the wheel brake cylinder to meet the braking demand. Among them, through the arrangement of the fourth isolation valve 7, the oil circuit control of the hydraulic brake system is simpler and more convenient to use.

[0057] It should be noted that the fourth isolation valve 7 is an isolation valve, which is used to control the on-off of the passage between the second end of the first isolation valve 4 and the oil chamber of the wheel brake cylinder and between the second end of the second isolation valve 5 and the oil chamber of the wheel brake cylinder. The specific type of the fourth isolation valve 7 can be set according to actual needs and is not limited to this.

[0058] like Figure 1 As shown, in some embodiments, the hydraulic braking system also includes: at least one fifth isolation valve 8, the first end of the fifth isolation valve 8 is connected to the oil chamber of the wheel brake cylinder, and the second end of the fifth isolation valve 8 discharges oil, and the fifth isolation valve 8 is turned on after being energized.

[0059] It can be understood that since the first end of the fifth isolation valve 8 is connected to the oil chamber of the wheel brake cylinder and the second end of the fifth isolation valve 8 discharges oil, the fifth isolation valve 8 is turned on after being energized, so that the fifth isolation valve 8 can discharge the oil in the oil chamber of the wheel brake cylinder after being energized, thereby achieving decompression of the oil chamber of the wheel brake cylinder.

[0060] It should be noted that the fifth isolation valve 8 is an isolation valve used for controlling the discharge of the oil chamber of the wheel brake cylinder. The specific type of the fifth isolation valve 8 can be set according to actual needs and is not limited to this.

[0061] like Figure 1 As shown, in some embodiments, the hydraulic brake system also includes: a first one-way valve 14, which is arranged between the second end of the first isolation valve 4 and the oil chamber of the wheel brake cylinder and between the second end of the second isolation valve 5 and the oil chamber of the wheel brake cylinder, and the fluid inlet end of the first one-way valve 14 is connected to the oil chamber of the wheel brake cylinder, and the fluid outlet end of the first one-way valve 14 is respectively connected to the second end of the first isolation valve 4 and the second end of the second isolation valve 5.

[0062] It can be understood that since the first one-way valve 14 is arranged between the second end of the first isolating valve 4 and the oil chamber of the wheel brake cylinder and between the second end of the second isolating valve 5 and the oil chamber of the wheel brake cylinder, the oil in the oil chamber of the wheel brake cylinder can be discharged into the oil chamber of the piston pump 3 and the oil chamber of the master cylinder 9 through the first one-way valve 14, so that with the cooperation of the first one-way valve 14 and the fourth isolating valve 7, a larger return oil flow rate can be achieved, thereby ensuring efficient braking control of the wheel brake cylinder.

[0063] It should be noted that the first one-way valve 14 is a one-way valve, which is used for one-way conduction from the wheel brake cylinder to the first isolation valve 4 and the second isolation valve 5. The specific type of the first one-way valve 14 can be set according to actual needs and is not limited to this.

[0064] like Figure 1 As shown, in some embodiments, the hydraulic brake system further includes: a pressure sensor 17, a detection end of the pressure sensor 17 is connected to the oil chamber of the piston pump 3, and the pressure sensor 17 is used to detect the pressure of the oil chamber of the piston pump 3.

[0065] It can be understood that since the detection end of the pressure sensor 17 is connected to the oil chamber of the piston pump 3, the pressure sensor 17 can detect the pressure of the oil chamber of the piston pump 3, thereby facilitating the control of the piston pump 3 or the pressure regulating valve 2 according to the pressure of the oil chamber of the piston pump 3, and then the pressure of the oil chamber of the wheel brake cylinder can be stabilized at a preset pressure, thereby ensuring stable braking of the hydraulic brake system.

[0066] It should be noted that the pressure sensor 17 is used to detect the pressure of the oil chamber of the piston pump 3. The specific type of the pressure sensor 17 can be set according to actual needs and is not limited to this.

[0067] like Figure 1 As shown, in some embodiments, the hydraulic brake system further includes: a second one-way valve 15, the fluid inlet of the second one-way valve 15 is connected to the oil, and the fluid outlet of the second one-way valve 15 is connected to the fluid inlet of the oil chamber of the piston pump 3.

[0068] It can be understood that since oil is passed into the liquid inlet end of the second one-way valve 15 and the liquid outlet end of the second one-way valve 15 is connected to the liquid inlet end of the oil chamber of the piston pump 3, the oil chamber of the piston pump 3 can be replenished with oil using the second one-way valve 15, so that with the cooperation of the second one-way valve 15 and the flow pump 1, a larger oil replenishment flow rate is achieved, thereby ensuring efficient braking control of the wheel brake cylinder by the piston pump 3.

[0069] It should be noted that the second one-way valve 15 is a one-way valve, which is used for one-way conduction from the oil pot 22 to the piston pump 3. The specific type of the second one-way valve 15 can be set according to actual needs and is not limited to this.

[0070] Among them, since the piston pump 3 can achieve fluid replenishment through the second one-way valve 15, the main brake module is not affected by the first redundant brake module, that is, oil leakage and other problems at components such as the pressure regulating valve 2 and the flow pump 1 will not affect the operation of the piston pump 3, thereby ensuring stable and reliable braking of the hydraulic brake system.

[0071] like Figure 1 As shown, in some embodiments, the hydraulic braking system also includes: a third one-way valve 16, which is arranged between the liquid outlet end of the flow pump 1 and the liquid inlet end of the oil chamber of the piston pump 3, and the liquid inlet end of the third one-way valve 16 is connected to the liquid outlet end of the flow pump 1, and the liquid outlet end of the third one-way valve 16 is connected to the liquid inlet end of the oil chamber of the piston pump 3.

[0072] It can be understood that since the third one-way valve 16 is arranged between the liquid outlet end of the flow pump 1 and the liquid inlet end of the oil chamber of the piston pump 3, and the liquid inlet end of the third one-way valve 16 is connected to the liquid outlet end of the flow pump 1, the liquid outlet end of the third one-way valve 16 is connected to the liquid inlet end of the oil chamber of the piston pump 3, so that the oil at the liquid outlet end of the flow pump 1 can be transported to the oil chamber of the piston pump 3 by the third one-way valve 16, so that by utilizing the one-way conduction of the third one-way valve 16, while realizing the pressurized delivery of oil from the flow pump 1 to the oil chamber of the piston pump 3, it is also possible to prevent the oil in the oil chamber of the piston pump 3 from leaking from the flow pump 1.

[0073] It should be noted that the third one-way valve 16 is a one-way valve, and the third one-way valve 16 is used for one-way conduction from the flow pump 1 to the piston pump 3. The specific type of the third one-way valve 16 can be set according to actual needs and is not limited to this.

[0074] like Figure 1 As shown, in some embodiments, at least one wheel brake cylinder includes: a first brake cylinder 18, a second brake cylinder 19, a third brake cylinder 20 and a fourth brake cylinder 21, and the oil chamber of the piston pump 3 is respectively connected to the oil chamber of the first brake cylinder 18, the oil chamber of the second brake cylinder 19, the oil chamber of the third brake cylinder 20 and the oil chamber of the fourth brake cylinder 21.

[0075] It can be understood that since the oil chamber of the piston pump 3 is connected to the oil chamber of the first brake cylinder 18, the oil chamber of the second brake cylinder 19, the oil chamber of the third brake cylinder 20 and the oil chamber of the fourth brake cylinder 21 respectively, after the piston pump 3 is turned on, it can pressurize and deliver oil to the oil chambers of the first brake cylinder 18, the second brake cylinder 19, the third brake cylinder 20 and the fourth brake cylinder 21 according to a preset pressure, thereby utilizing the first brake cylinder 18, the second brake cylinder 19, the third brake cylinder 20 and the fourth brake cylinder 21 to achieve braking of four wheels, and when the piston pump 3 fails, the flow pump 1 can pressurize and deliver oil to the oil chamber of the piston pump 3, and at the same time utilize the pressure regulating valve 2 to adjust the oil chamber pressure of the piston pump 3, thereby utilizing the oil chamber of the piston pump 3 to pressurize and deliver oil to the oil chambers of the first brake cylinder 18, the second brake cylinder 19, the third brake cylinder 20 and the fourth brake cylinder 21 according to a preset pressure, thereby utilizing the first brake cylinder 18, the second brake cylinder 19, the third brake cylinder 20 and the fourth brake cylinder 21 to achieve braking of four wheels.

[0076] It should be noted that the first brake cylinder 18, the second brake cylinder 19, the third brake cylinder 20 and the fourth brake cylinder 21 are all wheel brake cylinders. The first brake cylinder 18, the second brake cylinder 19, the third brake cylinder 20 and the fourth brake cylinder 21 can respectively correspond to the four wheels of the vehicle. For example, the first brake cylinder 18, the second brake cylinder 19, the third brake cylinder 20 and the fourth brake cylinder 21 can respectively correspond to the left front wheel, the right rear wheel, the right front wheel and the left rear wheel of the vehicle.

[0077] Specifically, the first brake cylinder 18, the second brake cylinder 19, the third brake cylinder 20 and the fourth brake cylinder 21 are respectively equipped with a set of fourth isolation valve 7, fifth isolation valve 8 and first check valve 14, and the first brake cylinder 18 and the second brake cylinder 19 share a set of first isolation valve 4 and second isolation valve 5, and the third brake cylinder 20 and the fourth brake cylinder 21 share a set of first isolation valve 4 and second isolation valve 5. At the same time, the second isolation valve 5 of the first brake cylinder 18 and the second brake cylinder 19 is connected to the first chamber of the master cylinder 9, and the second isolation valve 5 of the third brake cylinder 20 and the fourth brake cylinder 21 is connected to the second chamber of the master cylinder 9. Among them, the third isolation valve 6 is in parallel with the second isolation valve 5 of the third brake cylinder 20 and the fourth brake cylinder 21.

[0078] Among them, filters can be set at the ports of components such as the flow pump 1 and the pressure regulating valve 2 to filter impurities in the oil and ensure the stable operation of the hydraulic brake system.

[0079] The embodiment of the present disclosure further provides a vehicle, comprising: at least one wheel and a hydraulic brake system as in the embodiment of the present disclosure, wherein the wheel brake cylinder of the hydraulic brake system is connected to the wheel transmission, and the wheel brake cylinder is used for braking the wheel.

[0080] It can be understood that, through the setting of the piston pump 3, a main brake module of the hydraulic brake system is formed, through the setting of the pressure regulating valve 2 and the flow pump 1, a first redundant brake module of the hydraulic brake system is formed, and through the setting of the master cylinder 9 and the pedal 10, a second redundant brake module of the hydraulic brake system is formed. In the event of failure of the main brake module, the first redundant brake module can be used to execute the braking command, and in the event of failure of the main brake module and the first redundant brake module, the second redundant brake module can be used to execute the braking command, thereby meeting the demand for efficient braking. Moreover, the first redundant brake module only involves the pressure regulating valve 2 and the flow pump 1, and the overall structure is simple and the cost is low, thereby meeting the demand for high-efficiency and low-cost braking.

[0081] It should be noted that the specific type of vehicle can be set according to actual needs and is not limited to this. For example, the vehicle can be an electric vehicle, a fuel vehicle, a hybrid vehicle, etc.

[0082] Based on the hydraulic brake system of this embodiment, the vehicle can achieve the following braking modes:

[0083] Basic power-assisting mode: the first isolation valve 4, the second isolation valve 5 and the third isolation valve 6 are all energized. When the pedal 10 is stepped on, the displacement sensor 11 or the angle sensor 12 is used to control the piston pump 3 so that the piston pump 3 boosts the oil pressure and delivers it to the wheel brake cylinder, thereby using the wheel brake cylinder to achieve braking.

[0084] ACC (Adaptive Cruise Control) / AEB (Autonomous Emergency Braking) mode: the first isolation valve 4 and the second isolation valve 5 are both energized, and the system automatically controls the piston pump 3 so that the piston pump 3 boosts the oil pressure and delivers it to the wheel brake cylinder, thereby using the wheel brake cylinder to achieve braking.

[0085] ABS (Antilock Braking System) mode: on the basis of the basic power-assisting mode, anti-lock braking is achieved by controlling the fourth isolation valve 7 and the fifth isolation valve 8. Specifically, the fifth isolation valve 8 is controlled to be cut off to achieve pressurization of the wheel brake cylinder; the fourth isolation valve 7 is controlled to be cut off and the fifth isolation valve 8 is controlled to be cut off to achieve pressure maintenance of the wheel brake cylinder; the fourth isolation valve 7 is controlled to be cut off and the fifth isolation valve 8 is controlled to be turned on to achieve decompression of the wheel brake cylinder.

[0086] TCS (Torque Control System) / ESC (Electronic Stability Control System) mode: According to the vehicle stability, vehicle stability control is achieved by controlling each piston pump 3, the first isolation valve 4, the fourth isolation valve 7 and the fifth isolation valve 8. Specifically, one wheel brake cylinder is controlled to brake, while the other wheel brake cylinders are not braked; one wheel is controlled not to brake, while the other wheel brake cylinders are braked.

[0087] It should be noted that, in the description of the present disclosure, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, the meaning of "plurality" is two or more.

[0088] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0089] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0090] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A hydraulic brake system, comprising: a pedal, a master cylinder, a pedal simulator, a flow pump, a pressure regulating valve, a piston pump and at least one wheel brake cylinder; Wherein, the pedal is connected to the piston of the master cylinder by transmission, and the oil chamber of the master cylinder is connected to the oil chamber of at least one of the wheel brake cylinders, and the oil chamber of the pedal simulator is connected to the oil chamber of the master cylinder; Characterized in that the liquid outlet end of the flow pump is connected to the liquid inlet end of the oil chamber of the piston pump, and the liquid inlet end of the pressure regulating valve is connected to the liquid outlet end of the oil chamber of the piston pump, and the oil chamber of the piston pump is connected to the oil chamber of at least one of the wheel brake cylinders; When the pedal drives the piston of the master cylinder to move, the piston pump is used to pressurize and deliver oil to the oil chamber of the wheel brake cylinder, and when the piston pump fails, the flow pump is used to pressurize and deliver oil to the oil chamber of the piston pump, and the pressure regulating valve is used to adjust the oil chamber pressure of the piston pump, and when the piston pump and the flow pump fail, the oil chamber of the master cylinder is used to pressurize and deliver oil to the oil chamber of the wheel brake cylinder.

2. The hydraulic brake system according to claim 1, characterized in that: The hydraulic brake system also includes: At least one first isolation valve, wherein the first isolation valve is arranged between the oil chamber of the piston pump and the oil chamber of the wheel brake cylinder, and the first end of the first isolation valve is connected to the oil chamber of the piston pump, and the second end of the first isolation valve is connected to the oil chamber of at least one wheel brake cylinder, and the first isolation valve is turned on after being energized.

3. The hydraulic brake system according to claim 2, characterized in that: The hydraulic brake system also includes: A displacement sensor, wherein a detection end of the displacement sensor is connected to the piston of the master cylinder, and the displacement sensor is used to detect the displacement of the piston of the master cylinder; and / or An angle sensor, a detection end of the angle sensor is connected to the pedal, and the angle sensor is used to detect the angle of the pedal.

4. The hydraulic brake system according to claim 2, characterized in that: The hydraulic brake system also includes: At least one second isolation valve, wherein the second isolation valve is arranged between the oil chamber of the master cylinder and the oil chamber of the wheel brake cylinder, and the first end of the second isolation valve is connected to the oil chamber of the master cylinder, and the second end of the second isolation valve is connected to the oil chamber of at least one wheel brake cylinder, and the second isolation valve is cut off after being energized.

5. The hydraulic brake system according to claim 4, characterized in that: The hydraulic brake system also includes: The third isolation valve is arranged between the oil chamber of the pedal simulator and the oil chamber of the master cylinder, and the first end of the third isolation valve is connected to the oil chamber of the master cylinder, the second end of the third isolation valve is connected to the oil chamber of the pedal simulator, and the third isolation valve is turned on after being energized.

6. The hydraulic brake system according to claim 4, characterized in that: The hydraulic brake system also includes: At least one fourth isolation valve, wherein the fourth isolation valve is arranged between the second end of the first isolation valve and the oil chamber of the wheel brake cylinder and between the second end of the second isolation valve and the oil chamber of the wheel brake cylinder, and the first end of the fourth isolation valve is respectively connected with the second end of the first isolation valve and the second end of the second isolation valve, the second end of the fourth isolation valve is connected with the oil chamber of the wheel brake cylinder, and the fourth isolation valve is cut off after being energized.

7. The hydraulic brake system according to claim 6, characterized in that: The hydraulic brake system also includes: At least one fifth isolation valve, the first end of the fifth isolation valve is connected to the oil chamber of the wheel brake cylinder, and the second end of the fifth isolation valve discharges oil, and the fifth isolation valve is conductive after being energized.

8. The hydraulic brake system according to claim 4, characterized in that: The hydraulic brake system also includes: A first one-way valve, the first one-way valve is arranged between the second end of the first isolation valve and the oil chamber of the wheel brake cylinder and between the second end of the second isolation valve and the oil chamber of the wheel brake cylinder, and the liquid inlet end of the first one-way valve is connected to the oil chamber of the wheel brake cylinder, and the liquid outlet end of the first one-way valve is respectively connected to the second end of the first isolation valve and the second end of the second isolation valve.

9. The hydraulic brake system according to claim 1, characterized in that: The hydraulic brake system also includes: A pressure sensor, wherein a detection end of the pressure sensor is connected to the oil chamber of the piston pump, and the pressure sensor is used to detect the pressure of the oil chamber of the piston pump.

10. The hydraulic brake system according to claim 1, characterized in that: The hydraulic brake system also includes: A second one-way valve, wherein the oil is introduced into the liquid inlet end of the second one-way valve, and the liquid outlet end of the second one-way valve is connected to the liquid inlet end of the oil chamber of the piston pump.

11. The hydraulic brake system according to claim 1, characterized in that: The hydraulic brake system also includes: The third one-way valve is arranged between the liquid outlet end of the flow pump and the liquid inlet end of the oil chamber of the piston pump, and the liquid inlet end of the third one-way valve is connected to the liquid outlet end of the flow pump, and the liquid outlet end of the third one-way valve is connected to the liquid inlet end of the oil chamber of the piston pump.

12. The hydraulic brake system according to claim 1, characterized in that: The at least one wheel brake cylinder comprises: The first brake cylinder, the second brake cylinder, the third brake cylinder and the fourth brake cylinder, the oil chamber of the piston pump is connected with the oil chamber of the first brake cylinder, the oil chamber of the second brake cylinder, the oil chamber of the third brake cylinder and the oil chamber of the fourth brake cylinder respectively.

13. A vehicle, characterized in that: include: at least one wheel; The hydraulic brake system according to any one of claims 1 to 12, wherein the wheel brake cylinder of the hydraulic brake system is transmission-connected to the wheel, and the wheel brake cylinder is used for braking the wheel.

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