Hydraulic braking system and vehicle

Abstract

The embodiment of the utility model provides a hydraulic braking system of a vehicle and the vehicle. The hydraulic braking system of the vehicle comprises a brake, an energy accumulator, an oil tank, a controller and a first braking module. Wherein the first braking module comprises a proportional valve, and the proportional valve is connected with the controller; the proportional valve comprises a port P1, a port T1 and a port A1, the port P1 of the proportional valve is connected with the energy accumulator, the port T1 of the proportional valve is connected with the oil tank, and the port A1 of the proportional valve is connected with the brake; when the vehicle is in an unmanned driving mode and the vehicle is braked, the controller controls a P1 port and an A1 port of the proportional valve to be communicated; and when the braking of the vehicle is relieved, the controller controls the port T1 and the port A1 of the proportional valve to be communicated. And the braking safety requirement of the vehicle in the unmanned driving mode can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic braking, in particular to a hydraulic braking system and a vehicle. Background Art

[0002] With the development of vehicle technology, some vehicles capable of automatic driving have emerged. At present, when the vehicle is in unmanned driving mode, the proportional solenoid valve adjusts the movement of the valve core of the brake valve, allowing the oil to flow from the accumulator into the brake to achieve the braking function.

[0003] However, the existing hydraulic braking method has a relatively slow response speed and cannot smoothly complete the braking and releasing of the vehicle. Moreover, it is not conducive to quickly and frequently adjusting the driving state of the vehicle under complex road conditions, and is not conducive to meeting the braking safety requirements of autonomous driving. Utility Model Content

[0004] In view of the above problems, embodiments of the present utility model are proposed to provide a hydraulic brake system and a vehicle that overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above problems, the embodiment of the utility model discloses a hydraulic brake system for a vehicle, comprising: a brake, an accumulator, a fuel tank, a controller and a first brake module; wherein,

[0006] The first brake module includes a proportional valve, and the proportional valve is connected to the controller;

[0007] The proportional valve comprises a P1 port, a T1 port and an A1 port, the P1 port of the proportional valve is connected to the accumulator, the T1 port of the proportional valve is connected to the oil tank, and the A1 port of the proportional valve is connected to the brake;

[0008] When the vehicle is in the unmanned driving mode, the controller controls the P1 port and the A1 port of the proportional valve to be connected when the vehicle brakes; when the vehicle releases the brakes, the controller controls the T1 port and the A1 port of the proportional valve to be connected.

[0009] Optionally, the first brake module includes a first driving member, and the proportional valve is a first proportional control valve;

[0010] The first driving member is connected to the controller and the first proportional control valve respectively;

[0011] When the vehicle brakes, the controller drives the valve core of the first proportional control valve to move through the first driving member; when the vehicle releases the brakes, the controller drives the valve core of the first proportional control valve to move through the first driving member.

[0012] Optionally, the first proportional control valve includes: one of a proportional pressure control valve and a proportional brake valve;

[0013] And / or, the first driving component includes: one of a linear motor, an electric cylinder, and a pneumatic cylinder.

[0014] Optionally, the first braking module further includes an elastic member;

[0015] The elastic member is connected between the first driving member and the first proportional control valve;

[0016] When the vehicle brakes, the first driving member drives the valve core of the first proportional control valve to move through the elastic member, and the elastic member is compressed; when the vehicle releases the brake, the elastic member drives the valve core of the first proportional control valve to move.

[0017] Optionally, the proportional valve is a proportional solenoid valve.

[0018] Optionally, the hydraulic brake system further comprises a first sensor;

[0019] The first sensor is connected to the controller;

[0020] The first sensor is connected between the A1 port of the proportional valve and the brake, and is used to detect the output pressure of the A1 port of the proportional valve and feed it back to the controller.

[0021] Optionally, the hydraulic brake system includes a second sensor;

[0022] The second sensor is connected to the accumulator and the controller respectively, and is used for detecting the pressure of the accumulator and feeding back the pressure to the controller.

[0023] Optionally, the hydraulic brake system further comprises a second brake module and a brake pedal;

[0024] The second brake module is respectively connected to the brake pedal, the brake, the accumulator and the oil tank;

[0025] The vehicle is in a manned driving mode. When the vehicle brakes, the brake pedal drives the second brake module to connect the accumulator and the brake; when the vehicle releases the brake, the brake pedal drives the second brake module to connect the brake and the oil tank.

[0026] Optionally, the second brake module includes a hydraulic booster, a first pump and an oil pot, and the hydraulic booster is connected to the brake pedal;

[0027] The hydraulic booster comprises a P2 port, a T2 port and an A2 port, the P2 port of the hydraulic booster is connected to the accumulator, the T2 port of the hydraulic booster is connected to the oil tank, the A2 port of the hydraulic booster is connected to the first pump, and the first pump is respectively connected to the oil pot and the brake;

[0028] When the vehicle brakes, the brake pedal controls the P2 port and A2 port of the hydraulic booster to be connected, and the liquid oil in the oil tank flows into the brake through the first pump; when the vehicle releases the brake, the brake pedal controls the T2 port and A2 port of the hydraulic booster to be connected.

[0029] Optionally, the brakes include a front axle brake and a rear axle brake, and the number of the oil pots includes two;

[0030] The two oil pots are respectively arranged corresponding to the front axle brake and the rear axle brake;

[0031] The first pump is respectively connected to the corresponding front axle brake and the oil pot to form a first brake oil circuit; the first pump is respectively connected to the corresponding rear axle brake and the oil pot to form a second brake oil circuit.

[0032] Optionally, the first pump is a double-cylinder piston pump;

[0033] Alternatively, the first pump includes two sub-pumps, both of which are connected to the A2 port of the hydraulic booster, one of which is respectively connected to the corresponding front axle brake and the oil pot, and the other sub-pump is respectively connected to the corresponding rear axle brake and the oil pot.

[0034] Optionally, the second brake module includes a second proportional control valve connected to the brake pedal;

[0035] The second proportional control valve comprises a P3 port, a T3 port and an A3 port, the P3 port of the second proportional control valve is connected to the accumulator, the T3 port of the second proportional control valve is connected to the oil tank, and the A3 port of the second proportional control valve is connected to the brake;

[0036] When the vehicle brakes, the brake pedal controls the P3 port and the A3 port of the second proportional control valve to be connected; when the vehicle releases the brake, the brake pedal controls the T3 port and the A3 port of the second proportional control valve to be connected.

[0037] Optionally, the second proportional control valve includes: a proportional pressure control valve and a proportional brake valve.

[0038] Optionally, the hydraulic brake system includes a shuttle valve;

[0039] The shuttle valve comprises a P4 port, a P5 port and a C port, the P4 port of the shuttle valve is connected to the A1 port of the proportional valve, the P5 port of the shuttle valve is connected to the second brake module, and the C port of the shuttle valve is connected to the brake.

[0040] Optionally, the hydraulic brake system further comprises a filter;

[0041] The filter is disposed between the T1 port of the proportional valve and the oil tank, and the filter is disposed between the second brake module and the oil tank, and is used to filter the liquid oil flowing back to the oil tank.

[0042] Optionally, the hydraulic brake system further comprises a second driving member and a second pump;

[0043] The second driving member is connected to the controller and the second pump respectively, and the controller drives the second pump through the second driving member;

[0044] The second pump is connected between the accumulator and the oil tank, and is used to pump the liquid oil in the oil tank into the accumulator.

[0045] Optionally, the hydraulic brake system further comprises a one-way valve;

[0046] The one-way valve is connected between the accumulator and the second pump so that the liquid oil in the second pump is transmitted to the accumulator in one direction.

[0047] Optionally, the second driving member includes: one of a motor, an engine, a cylinder, and an electric cylinder.

[0048] Optionally, the hydraulic brake system further comprises a safety valve;

[0049] The safety valve is connected to the controller;

[0050] The safety valve is connected between the oil tank and one end of the second pump connected to the accumulator.

[0051] In a second aspect, the utility model further discloses a vehicle, comprising the hydraulic brake system as described above.

[0052] The utility model embodiment includes the following advantages:

[0053] In an embodiment of the utility model, the vehicle is in an unmanned driving mode. When the vehicle brakes, the controller can control the P1 port and the A1 port of the proportional valve to be connected, so that the proportional valve is connected to the accumulator and the brake, and the liquid oil in the accumulator enters the brake through the proportional valve, so as to achieve the braking of the vehicle. When the vehicle releases the brake, the controller can control the T1 port and the A1 port of the proportional valve to be connected, so that the proportional valve is connected to the brake and the oil tank, and the liquid oil in the brake flows into the oil tank through the proportional valve, so as to achieve the release of the brake of the vehicle. The oil circuit in the utility model is simple, which can improve the response speed of the vehicle's braking, facilitate the smooth completion of the braking and releasing of the vehicle, and in complex road conditions, it is conducive to quickly and frequently adjusting the driving state of the vehicle, which can meet the braking safety requirements of the vehicle in the unmanned driving mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a hydraulic principle diagram of a hydraulic brake system of the utility model;

[0055] Figure 2 It is a hydraulic principle diagram of another hydraulic brake system of the utility model;

[0056] Figure 3 It is a hydraulic principle diagram of another hydraulic brake system of the utility model.

[0057] Description of reference numerals:

[0058] 11-brake, 111-front axle brake, 112-rear axle brake, 12-shuttle valve, 2-accumulator, 31-oil tank, 32-filter, 4-controller, 5-first brake module, 51-proportional valve, 52-first drive member, 53-elastic member, 61-first sensor, 62-second sensor, 7-second brake module, 71-hydraulic booster, 72-first pump, 73-oil pot, 74-second proportional control valve, 8-brake pedal, 91-second drive member, 92-second pump, 93-check valve, 94-safety valve. DETAILED DESCRIPTION

[0059] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0060] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0061] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0062] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] One of the core concepts of the embodiment of the utility model is to disclose a hydraulic brake system for a vehicle, including: a brake 11, an accumulator 2, a fuel tank 31, a controller 4 and a first brake module 5; wherein the first brake module 5 includes a proportional valve 51, and the proportional valve 51 is connected to the controller 4; the proportional valve 51 includes a P1 port, a T1 port and an A1 port, the P1 port of the proportional valve 51 is connected to the accumulator 2, the T1 port of the proportional valve 51 is connected to the fuel tank 31, and the A1 port of the proportional valve 51 is connected to the brake 11; when the vehicle is in an unmanned driving mode, when the vehicle brakes, the controller 4 controls the P1 port and the A1 port of the proportional valve 51 to be connected; when the vehicle releases the brake, the controller 4 controls the T1 port and the A1 port of the proportional valve 51 to be connected.

[0064] In the embodiment of the utility model, when the vehicle is in the unmanned driving mode, when the vehicle brakes, the controller 4 can control the P1 port and the A1 port of the proportional valve 51 to be connected, so that the proportional valve 51 is connected to the accumulator 2 and the brake 11, and the liquid oil in the accumulator 2 enters the brake 11 through the proportional valve 51, so as to achieve the braking of the vehicle; when the vehicle releases the brake, the controller 4 can control the T1 port and the A1 port of the proportional valve 51 to be connected, so that the proportional valve 51 is connected to the brake 11 and the oil tank 31, and the liquid oil in the brake 11 flows into the oil tank 31 through the proportional valve 51, so as to achieve the release of the brake of the vehicle. The oil circuit in the utility model is simple, which can improve the response speed of the vehicle braking, facilitate the smooth completion of the braking and releasing of the vehicle, and in complex road conditions, it is conducive to quickly and frequently adjusting the driving state of the vehicle, which can meet the braking safety requirements of the vehicle in the unmanned driving mode.

[0065] The brake 11 described in the embodiment of the utility model can cooperate with the wheels in the vehicle to slow down, stop or keep the wheels stopped. The accumulator 2 and the oil tank 31 described in the embodiment of the utility model can both be used to store liquid oil. The controller 4 in the embodiment of the utility model is the master control in the hydraulic brake system, which is used to control the operating state of each component in the hydraulic brake system. The first brake module 5 in the embodiment of the utility model is used to adjust the posture adjustment of the vehicle in the unmanned driving mode.

[0066] Specifically, the first brake module 5 includes a proportional valve 51, which can be electrically connected to the controller 4, so that a control signal is input to the proportional valve 51 through the controller 4, thereby adjusting the working state of the proportional valve 51. The valve port of the proportional valve 51 can be opened to any opening as needed, thereby controlling the size of the flow rate.

[0067] Specifically, the proportional valve 51 may include a P1 port, a T1 port, and an A1 port. The P1 port of the proportional valve 51 is connected to the accumulator 2, the T1 port of the proportional valve 51 is connected to the oil tank 31, and the A1 port of the proportional valve 51 is connected to the brake 11. When there is no driving force, the T1 port and the A1 port of the proportional valve 51 are connected; when there is driving force, the P1 port and the A1 port of the proportional valve 51 are connected.

[0068] Furthermore, when the vehicle is in the unmanned driving mode and the vehicle brakes, the controller 4 can input a control signal to the proportional valve 51 so that the P1 port and the A1 port of the proportional valve 51 are connected, and the liquid oil in the accumulator 2 can flow from the P1 port of the proportional valve 51 into the proportional valve 51, and then flow from the A1 port of the proportional valve 51 into the brake 11 to control the vehicle to decelerate, stop or maintain a stopped state.

[0069] When the vehicle is in the unmanned driving mode and the brakes of the vehicle are released, the controller 4 can input a control signal to the proportional valve 51 so that the T1 port and the A1 port of the proportional valve 51 are connected, and the liquid oil in the brake 11 can flow back from the A1 port of the proportional valve 51 to the proportional valve 51, and then flow from the T1 port of the proportional valve 51 to the oil tank 31 to achieve pressure relief and release the brakes on the vehicle.

[0070] For example, Figure 1 As shown, when the controller 4 receives a brake request signal from the vehicle, the controller 4 controls the valve core of the proportional valve 51 to move right, so that the P1 port and the A1 port of the proportional valve 51 are connected, thereby realizing the braking of the vehicle; when the controller 4 receives a brake release request signal from the vehicle, the controller 4 controls the valve core of the proportional valve 51 to move left, so that the T1 port and the A1 port of the proportional valve 51 are connected.

[0071] Specifically, the controller 4 may also be electrically connected to the vehicle peripheral sensors to receive the vehicle's braking request signal and braking release request signal.

[0072] In the embodiment of the utility model, when the vehicle brakes, the liquid oil in the accumulator 2 can enter the brake 11 through the proportional valve 51; when the vehicle releases the brake, the liquid oil in the brake 11 can flow to the oil tank 31. The flow path of the liquid oil is simple, which can improve the response speed of the vehicle's braking, facilitate smooth braking and releasing of the vehicle, and in complex road conditions, it is conducive to quickly and frequently adjusting the driving state of the vehicle, which can meet the braking safety requirements of the vehicle in the unmanned driving mode.

[0073] Optionally, the first braking module 5 includes a first driving member 52, and the proportional valve 51 is a first proportional control valve; the first driving member 52 is connected to the controller 4 and the first proportional control valve respectively; when the vehicle brakes, the controller 4 drives the valve core of the first proportional control valve to move through the first driving member 52; when the vehicle releases the brakes, the controller 4 drives the valve core of the first proportional control valve to move through the first driving member 52.

[0074] In an embodiment of the utility model, the first driving member 52 is respectively connected to the controller 4 and the first proportional control valve, so that the first driving member 52 can drive the first proportional control valve to operate, which can improve the response speed and control accuracy of the first proportional control valve and better meet the requirements of frequently and rapidly changing brake pressure.

[0075] Specifically, the controller 4 can be electrically connected to the first driving member 52 to timely control the start and stop of the first driving member 52. The first driving member 52 is connected to the first proportional control valve, and the first driving member 52 can drive the valve core of the first proportional control valve to move. The valve port size of the first proportional control valve can be adjusted by controlling the movement amount of the valve core of the first proportional control valve to achieve different brake pressure outputs.

[0076] Optionally, the first proportional control valve includes: one of a proportional pressure control valve and a proportional brake valve, which can improve the structural diversity of the first proportional control valve.

[0077] Specifically, the proportional pressure control valve is a pressure control valve with a proportional pressure reducing function, and the proportional brake valve is a brake valve with a proportional pressure reducing function.

[0078] Optionally, the first driving member 52 includes: one of a linear motor, an electric cylinder, and a pneumatic cylinder, which can improve the structural diversity of the first driving member 52.

[0079] For example, Figure 1 As shown, taking the first driving member 52 as a linear motor and the first proportional control valve as a proportional pressure control valve as an example, the linear motor can drive the valve core of the proportional pressure control valve to move rightward, thereby achieving connection between the P1 port and the A1 port of the proportional pressure control valve.

[0080] Optionally, the first braking module 5 also includes an elastic member 53; the elastic member 53 is connected between the first driving member 52 and the first proportional control valve; when the vehicle brakes, the first driving member 52 drives the valve core of the first proportional control valve to move through the elastic member 53, and the elastic member 53 is compressed; when the vehicle releases the brakes, the elastic member 53 drives the valve core of the first proportional control valve to move.

[0081] In the embodiment of the utility model, when the vehicle releases the brake, the valve core of the first proportional control valve can be driven by the rebound force of the elastic member 53 to move, which can improve the reliability of the connection between the T1 port and the A1 port of the first proportional control valve.

[0082] Specifically, the elastic member 53 may be a compression spring or a telescopic spring.

[0083] In some other optional embodiments of the utility model, the proportional valve 51 is a proportional solenoid valve, which provides push-pull forces of different sizes through the proportional coil on the proportional solenoid valve, thereby controlling the movement of the valve core of the proportional solenoid valve, thereby improving the response speed and control accuracy of the proportional valve 51 and meeting the requirements of frequently and rapidly changing brake pressure.

[0084] Specifically, the proportional solenoid valve is a solenoid valve with a proportional pressure reducing function.

[0085] Optionally, the hydraulic brake system also includes a first sensor 61; the first sensor 61 is connected to the controller 4; the first sensor 61 is connected between the A1 port of the proportional valve 51 and the brake 11, and the first sensor 61 is used to detect the output pressure of the A1 port of the proportional valve 51 and feed it back to the controller 4.

[0086] In an embodiment of the utility model, the first sensor 61 can detect the output pressure of the A1 port of the proportional valve 51 and feed it back to the controller 4. In this way, the controller 4 can compare the pressure value fed back by the first sensor 61 with the received braking request signal to meet the braking requirements of the vehicle, thereby improving the reliability of vehicle braking in the unmanned driving mode.

[0087] Specifically, the first sensor 61 can be electrically connected to the controller 4, and the first sensor 61 can detect the output pressure of the A1 port of the proportional valve 51 in real time and feed it back to the controller 4. The controller 4 can be responsible for receiving and processing the brake request signal in the unmanned driving mode and the signal of the first sensor 61. The controller 4 can compare the pressure value fed back by the first sensor 61 with the received brake request signal. If the two do not match, the controller 4 can further output a control signal to adjust the valve port opening size of the proportional valve 51 until the pressure value fed back by the first sensor 61 matches the strength of the brake request signal.

[0088] Furthermore, if the first sensor 61 detects that the output pressure of the A1 port of the proportional valve 51 is in an abnormal state for a long time, it will be fed back to the controller 4, and the controller 4 can also control the vehicle to stop running and issue an alarm, thereby improving the safety of vehicle driving.

[0089] Specifically, the first sensor 61 may be a strain gauge pressure sensor, a piezoresistive pressure sensor, a capacitive pressure sensor or other pressure sensor to improve the reliability of monitoring the output pressure of the A1 port of the proportional valve 51 .

[0090] Specifically, the output pressure of the A1 port of the proportional valve 51 is positively correlated with the valve port opening of the proportional valve 51, that is, the larger the valve port opening of the proportional valve 51, the greater the output pressure of the A1 port of the proportional valve 51, so that the hydraulic brake system provides greater braking force on the wheel.

[0091] Optionally, the hydraulic brake system includes a second sensor 62 ; the second sensor 62 is connected to the accumulator 2 and the controller 4 , respectively, and is used to detect the pressure of the accumulator 2 and feed back to the controller 4 .

[0092] In the embodiment of the utility model, the second sensor 62 can detect the pressure of the accumulator 2 and feed it back to the controller 4, so as to timely detect the insufficient amount of liquid oil in the accumulator 2 and timely fill the accumulator 2, thereby improving the reliability and stability of the operation of the hydraulic brake system.

[0093] Specifically, the second sensor 62 can be electrically connected to the controller 4, so that the controller 4 can process the signal of the second sensor 62. The second sensor 62 can monitor the pressure of the accumulator 2 in real time. When the pressure of the monitored accumulator 2 exceeds the preset range value, the second sensor 62 can output an abnormal signal to the sensor, and the controller 4 can control the filling module to fill the accumulator 2 until the pressure of the accumulator 2 meets the preset range value. The controller 4 can control the filling module to stop filling the accumulator 2. Among them, the preset range value can be set according to actual needs.

[0094] Furthermore, if the second sensor 62 detects that the pressure of the accumulator 2 is in an abnormal state for a long time, the sensor 62 will feed back to the controller 4, and the controller 4 can control the vehicle to stop running and issue an alarm, thereby improving the safety of vehicle driving.

[0095] Specifically, the second sensor 62 may be a pressure sensor such as a strain gauge pressure sensor, a piezoresistive pressure sensor, or a capacitive pressure sensor, so as to improve the reliability of monitoring the pressure of the accumulator 2 .

[0096] In some other optional embodiments of the utility model, the hydraulic braking system also includes a second braking module 7 and a brake pedal 8; the second braking module 7 is respectively connected to the brake pedal 8, the brake 11, the accumulator 2 and the fuel tank 31; when the vehicle is in manned driving mode, when the vehicle brakes, the brake pedal 8 drives the second braking module 7 to connect the accumulator 2 and the brake 11; when the vehicle releases the brakes, the brake pedal 8 drives the second braking module 7 to connect the brake 11 and the fuel tank 31.

[0097] In an embodiment of the utility model, when the vehicle is in a manned driving mode, the second brake module 7 can be driven to move by the brake pedal 8, thereby braking or releasing the brakes on the vehicle, so that the manned driving mode and the unmanned driving mode in the embodiment of the utility model operate independently without conflicting with each other.

[0098] Specifically, the driver can step on the brake pedal 8, and the brake pedal 8 can drive the second brake module 7 to connect the accumulator 2 and the brake 11, so that the liquid oil in the accumulator 2 can flow into the brake 11, thereby braking the vehicle; the driver releases the brake pedal 8, and the brake pedal 8 can drive the second brake module 7 to connect the brake 11 and the oil tank 31, so that the liquid oil in the brake 11 can flow into the oil tank 31, thereby releasing the pressure and releasing the brakes on the vehicle.

[0099] Specifically, when the vehicle is in the unmanned driving mode, if the controller 4 detects that the brake pedal 8 is depressed, the first brake module 5 stops working, and the vehicle exits the unmanned driving mode and enters the manned driving mode. Figure 1As shown, when the vehicle is in the manned driving mode, the valve core of the proportional valve 51 is located at the far left end, the P1 port of the proportional valve 51 is in a cut-off state, and the A1 port and the T1 port of the proportional valve 51 are connected. At this time, the oil in the accumulator 2 will not pass through the first brake module 5, and the unmanned driving mode stops working.

[0100] Optionally, the second brake module 7 includes a hydraulic booster 71, a first pump 72 and an oil pot 73; the hydraulic booster 71 is connected to the brake pedal 8 to drive the valve core movement of the hydraulic booster 71 through the brake pedal 8; the hydraulic booster 71 includes a P2 port, a T2 port and an A2 port, the P2 port of the hydraulic booster 71 is connected to the accumulator 2, the T2 port of the hydraulic booster 71 is connected to the oil tank 31, the A2 port of the hydraulic booster 71 is connected to the first pump 72, and the first pump 72 is respectively connected to the oil pot 73 and the brake 11; when the vehicle brakes, the brake pedal 8 controls the P2 port and the A2 port of the hydraulic booster 71 to be connected, and the liquid oil in the oil pot 73 flows into the brake 11 through the first pump 72; when the vehicle releases the brake, the brake pedal 8 controls the T2 port and the A2 port of the hydraulic booster 71 to be connected.

[0101] In the embodiment of the utility model, when the brake pedal 8 is stepped on, the brake pedal 8 drives the valve core of the hydraulic booster 71 to move, so that the P2 port and the A2 port of the hydraulic booster 71 are connected, and the liquid oil in the accumulator 2 enters the hydraulic booster 71 from the P2 port of the hydraulic booster 71, and then enters the first pump 72 from the A2 port of the hydraulic booster 71, so that the first pump 72 pumps the liquid oil in the oil pot 73 into the brake 11, thereby braking the vehicle.

[0102] Specifically, the brake pedal 8 is released, the driving force disappears, the T2 port and the A2 port of the hydraulic booster 71 are connected, and the liquid oil in the hydraulic booster 71 flows from the T2 port into the oil tank 31 to achieve pressure relief and release the brakes on the vehicle.

[0103] Specifically, the brake pedal 8 may be rigidly connected to the hydraulic booster 71, and the driver may provide driving force to the hydraulic booster 71 by stepping on the brake pedal 8. When there is no driving force, the T2 port and the A2 port of the hydraulic booster 71 are connected; when there is driving force, the P2 port and the A2 port of the hydraulic booster 71 are connected.

[0104] Specifically, the valve opening of the hydraulic booster 71 is positively correlated with the stroke of the brake pedal 8, that is, the greater the stroke of the brake pedal 8, the larger the valve opening of the hydraulic booster 71, and the greater the liquid oil pressure output from the A2 port of the hydraulic booster 71, so that the braking force provided by the hydraulic brake system is greater.

[0105] Optionally, the brake 11 includes a front axle brake 111 and a rear axle brake 112, and the number of the oil pots 73 includes two; the two oil pots 73 are respectively arranged corresponding to the front axle brake 111 and the rear axle brake 112; the first pump 72 is respectively connected to the corresponding front axle brake 111 and the oil pot 73 to form a first brake oil circuit; the first pump 72 is respectively connected to the corresponding rear axle brake 112 and the oil pot 73 to form a second brake oil circuit.

[0106] In the embodiment of the utility model, the first brake oil circuit can deliver the fluid oil to the front axle brake 111, and the second brake oil circuit can deliver the fluid oil to the rear axle brake 112, which can further improve the reliability of vehicle braking.

[0107] Specifically, the front axle brake 111 may be connected to the front wheels of the vehicle to control the deceleration or parking of the front wheels; and the rear axle brake 112 may be connected to the rear wheels of the vehicle to control the deceleration or parking of the rear wheels.

[0108] Specifically, the first brake oil circuit and the second brake oil circuit can be independently provided.

[0109] Optionally, the first pump 72 is a double-cylinder piston pump, such as Figure 1 and Figure 2 As shown, the double-cylinder piston pump may have two fluid oil chambers, which may improve the reliability of the first pump 72 pumping fluid oil into the front axle brake 111 and the rear axle brake 112 respectively, and may improve the accuracy of simultaneous braking of the front and rear wheels.

[0110] Specifically, Figure 1 and Figure 2 As shown, the brake pedal 8 is stepped on, the valve core of the hydraulic booster 71 moves to the left, the P2 port and the A2 port of the hydraulic booster 71 are connected, the liquid oil of the accumulator 2 flows into from the P2 port of the hydraulic booster 71, and enters the first pump 72 from the A2 port of the hydraulic booster 71 to push the piston of the first pump 72 to move to the left. During the movement of the piston, the liquid oil in the oil pot 73 enters the first pump 72, and then flows out from the B1 port and the B2 port of the first pump 72 to enter the front axle brake 111 and the rear axle brake 112 respectively.

[0111] Optionally, the first pump 72 includes two sub-pumps, both of which are connected to the A2 port of the hydraulic booster 71, one of the sub-pumps is respectively connected to the corresponding front axle brake 111 and the oil pot 73, and the other sub-pump is respectively connected to the corresponding rear axle brake 112 and the oil pot 73, so that one sub-pump can pump the liquid oil in the oil pot 73 into the front axle brake 111, and the other sub-pump can pump the liquid oil in the oil pot 73 into the rear axle brake 112, so as to respectively realize braking of the front wheels and the rear wheels.

[0112] Specifically, the hydraulic booster 71 can drive two sub-pumps to work simultaneously, and the two sub-pumps can work synchronously, which can improve the reliability of synchronous braking of the front and rear wheels of the vehicle.

[0113] Optionally, the second brake module 7 includes a second proportional control valve 74; the second proportional control valve 74 includes a P3 port, a T3 port and an A3 port, the P3 port of the second proportional control valve 74 is connected to the accumulator 2, the T3 port of the second proportional control valve 74 is connected to the oil tank 31, and the A3 port of the second proportional control valve 74 is connected to the brake 11; when the vehicle brakes, the brake pedal 8 controls the P3 port and A3 port of the second proportional control valve 74 to be connected; when the vehicle releases the brakes, the brake pedal 8 controls the T3 port and A3 port of the second proportional control valve 74 to be connected.

[0114] In the embodiment of the utility model, when the brake pedal 8 is stepped on, the brake pedal 8 can drive the valve core of the second proportional control valve 74 to move, so that the P3 port and the A3 port of the second proportional control valve 74 are connected, so that the liquid oil of the accumulator 2 can enter the second proportional control valve 74 from the P3 port of the second proportional control valve 74, and then enter the brake 11 from the A3 port of the second proportional control valve 74, so as to achieve the braking of the vehicle. After the brake pedal 8 is released, the driving force of the second proportional control valve 74 disappears, so that the T3 port and the A3 port of the second proportional control valve 74 are connected, and the liquid oil in the brake 11 can enter the second proportional control valve 74 from the A3 port, and then flow into the oil tank 31 from the P3 port of the second proportional control valve 74, so as to achieve pressure relief and release the braking of the vehicle.

[0115] Specifically, the brake pedal 8 and the second proportional control valve 74 may be rigidly connected, and the driver may provide driving force to the second proportional control valve 74 by stepping on the brake pedal 8. In the absence of driving force, the T3 port and the A3 port of the second proportional control valve 74 are connected; in the presence of driving force, the P3 port and the A3 port of the second proportional control valve 74 are connected.

[0116] Specifically, Figure 3 As shown, the number of the second proportional control valves 74 may include two, and the two second proportional control valves 74 may be respectively disposed corresponding to the front axle brake 111 and the rear axle brake 112 .

[0117] Specifically, the valve opening of the second proportional control valve 74 is positively correlated with the stroke of the brake pedal 8. The greater the stroke of the brake pedal 8, the greater the valve opening of the second proportional control valve 74 and the greater the output pressure, so that the hydraulic brake system has a greater braking force on the vehicle.

[0118] Optionally, the second proportional control valve 74 includes: a proportional pressure control valve and a proportional brake valve, which can improve the structural diversity of the second proportional control valve 74.

[0119] Optionally, the hydraulic braking system includes a shuttle valve 12; the shuttle valve 12 includes a P4 port, a P5 port and a C port, the P4 port of the shuttle valve 12 is connected to the A1 port of the proportional valve 51, the P5 port of the shuttle valve 12 is connected to the second brake module 7, and the C port of the shuttle valve 12 is connected to the brake 11.

[0120] In the embodiment of the present utility model, the shuttle valve 12 can be used to improve the reliability of the vehicle switching between the unmanned driving mode and the manned driving mode.

[0121] Specifically, since the P4 port of the shuttle valve 12 is connected to the A1 port of the proportional valve 51, in the unmanned driving mode, when the controller 4 receives the brake request signal, the controller 4 controls the P1 port and the A1 port of the proportional valve 51 to be connected, and the liquid oil in the accumulator 2 enters the shuttle valve 12 through the P1 port, the A1 port, and the P4 port in sequence, and the valve core of the shuttle valve 12 moves to the left, so that the P4 port and the C port of the shuttle valve 12 are connected, so that the liquid oil in the shuttle valve 12 can enter the brake 11, and the vehicle can be braked. When the controller 4 receives the brake release request signal, the controller 4 controls the T1 port and the A1 port of the proportional valve 51 to be connected, and the liquid oil in the brake 11 flows back to the proportional valve 51 through the shuttle valve 12, and then flows into the oil tank 31 from the T1 port of the proportional valve 51 to release the pressure, so as to release the vehicle's brakes.

[0122] Specifically, since the P5 port of the shuttle valve 12 is connected to the second brake module 7, in the manned driving mode, the liquid oil in the accumulator 2 passes through the second brake module 7, the P5 port and the C port in sequence, and then enters the brake 11, so as to brake the vehicle.

[0123] Specifically, Figure 2 As shown, the number of shuttle valves 12 can be two, and the two shuttle valves 12 can correspond to the front axle brake 111 and the rear axle brake 112 respectively. Further, the P1 and A1 ports of the proportional valve 51 are connected, and the valve core of the shuttle valve 12 moves leftward under the action of the elastic member 53 and the liquid oil, so that the P4 port of the shuttle valve 12 can be connected with the C port; specifically, the P2 port and the A2 port of the hydraulic booster 71 are connected, and the first pump 72 pumps the liquid oil into the shuttle valve 12 from the P5 port of the shuttle valve 12, and the valve core of the shuttle valve 12 moves rightward under the action of the elastic member 53 and the liquid oil, so that the P5 port of the shuttle valve 12 can be connected with the C port.

[0124] Optionally, the hydraulic brake system further includes a filter 32 ; the filter 32 is disposed between the T1 port of the proportional valve 51 and the oil tank 31 , and the filter 32 is disposed between the second brake module 7 and the oil tank 31 , for filtering the liquid oil flowing back to the oil tank 31 .

[0125] In the embodiment of the utility model, the filter 32 can filter impurities in the liquid oil flowing from the brake 11 into the oil tank 31, and can improve the purity of the recovered liquid oil.

[0126] Specifically, the filter 32 may be disposed close to the oil tank 31 to filter all the liquid oil flowing into the oil tank 31 in the hydraulic brake system.

[0127] Specifically, Figure 1 As shown, the proportional valve 51 is a first proportional control valve, and the oil flowing out of the T1 port of the first proportional control valve is first filtered by the filter 32 and then enters the oil tank 31. Figure 2 As shown, the proportional valve 51 is a proportional solenoid valve, and the oil flowing out of the T1 port of the proportional solenoid valve is first filtered by the filter 32 before entering the oil tank 31. The oil flowing out of the T2 port of the hydraulic booster 71 is first filtered by the filter 32 before entering the oil tank 31. Figure 3 As shown, the liquid oil flowing out from the T3 port of the second proportional control valve 74 is first filtered by the filter 32 and then enters the oil tank 31 , and the liquid oil flowing out from the second pump 92 can be first filtered by the filter 32 and then enter the oil tank 31 .

[0128] Optionally, the hydraulic braking system also includes a second driving member 91 and a second pump 92; the second driving member 91 is connected to the controller 4 and the second pump 92 respectively, and the controller 4 drives the second pump 92 through the second driving member 91; the second pump 92 is connected between the accumulator 2 and the oil tank 31, and is used to pump the liquid oil in the oil tank 31 into the accumulator 2.

[0129] In the embodiment of the utility model, the liquid oil in the oil tank 31 is pumped into the accumulator 2, so that the accumulator 2 can be filled with liquid and the liquid oil can be recycled.

[0130] Specifically, after the second sensor 62 feedbacks that the pressure of the accumulator 2 exceeds the preset range value, the controller 4 can control the second driving member 91 to drive the second pump 92 to work, so that the second pump 92 can pump the liquid oil in the oil tank 31 into the accumulator 2 to fill the accumulator 2, which can ensure that the pressure of the accumulator 2 is always in a relatively stable state, and can improve the reliability of the hydraulic braking system on vehicle braking.

[0131] Specifically, the controller 4 is electrically connected to the second driving member 91 to control the start and stop of the second driving member 91 in a timely manner.

[0132] Optionally, the second driving member 91 includes: one of a motor, an engine, a cylinder, and an electric cylinder, which can improve the selection diversity of the second driving member 91.

[0133] Optionally, the hydraulic brake system further includes a one-way valve 93 ; the one-way valve 93 is connected between the accumulator 2 and the second pump 92 , so that the liquid oil in the second pump 92 is transmitted to the accumulator 2 in one direction, which can effectively ensure the pressure in the accumulator 2 .

[0134] Optionally, the hydraulic brake system further includes a safety valve 94 ; the safety valve 94 is connected to the controller 4 ; the safety valve 94 is connected between one end of the second pump 92 connected to the accumulator 2 and the oil tank 31 .

[0135] In the embodiment of the utility model, when a fault occurs in the hydraulic brake system resulting in a different oil circuit, but the second pump 92 continues to charge the accumulator 2, the safety valve 94 can control the second pump 92 to pump the liquid oil into the oil tank 31, which can relieve pressure and improve the reliability of the operation of the hydraulic brake system.

[0136] Specifically, the safety valve 94 may be electrically connected to the controller 4 so that a control signal is input to the safety valve 94 through the controller 4 .

[0137] Specifically, Figure 1 As shown, one end of the oil tank 31 is connected to one end of the second pump 92, and the other end of the second pump 92 is respectively connected to the accumulator 2 and the safety valve 94, and the end of the safety valve 94 away from the second pump 92 is connected to the oil tank 31, so that the second pump 92 can pump the liquid oil in the oil tank 31 into the accumulator 2 or the oil tank 31.

[0138] The hydraulic brake system described in the embodiment of the utility model has at least the following advantages:

[0139] In an embodiment of the utility model, when the vehicle is in an unmanned driving mode, when the vehicle brakes, the controller can control the P1 port and the A1 port of the proportional valve to be connected, so that the proportional valve is connected to the accumulator and the brake, and the liquid oil in the accumulator enters the brake through the proportional valve, so as to achieve the braking of the vehicle. When the vehicle releases the brake, the controller can control the T1 port and the A1 port of the proportional valve to be connected, so that the proportional valve is connected to the brake and the oil tank, and the liquid oil in the brake flows into the tank through the proportional valve, so as to achieve the release of the brake of the vehicle. The oil circuit in the utility model is simple, which can improve the response speed of the vehicle's braking, facilitate the smooth completion of the braking and releasing of the vehicle, and in complex road conditions, it is conducive to quickly and frequently adjusting the driving state of the vehicle, which can meet the braking safety requirements of the vehicle in the unmanned driving mode.

[0140] In a second aspect, an embodiment of the utility model further discloses a vehicle, comprising: the above-mentioned hydraulic brake system.

[0141] Specifically, the vehicle includes but is not limited to: a car, a truck, a van, a tricycle, etc.

[0142] The vehicle described in the embodiment of the utility model has at least the following advantages:

[0143] In an embodiment of the utility model, when the vehicle is in an unmanned driving mode, when the vehicle brakes, the controller can control the P1 port and the A1 port of the proportional valve to be connected, so that the proportional valve is connected to the accumulator and the brake, and the liquid oil in the accumulator enters the brake through the proportional valve, so as to achieve the braking of the vehicle. When the vehicle releases the brake, the controller can control the T1 port and the A1 port of the proportional valve to be connected, so that the proportional valve is connected to the brake and the oil tank, and the liquid oil in the brake flows into the tank through the proportional valve, so as to achieve the release of the brake of the vehicle. The oil circuit in the utility model is simple, which can improve the response speed of the vehicle's braking, facilitate the smooth completion of the braking and releasing of the vehicle, and in complex road conditions, it is conducive to quickly and frequently adjusting the driving state of the vehicle, which can meet the braking safety requirements of the vehicle in the unmanned driving mode.

[0144] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0145] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0146] The hydraulic brake system and vehicle of a vehicle provided by the utility model are introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. At the same time, for general technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A hydraulic brake system for a vehicle, characterized in that: include: brake, accumulator, oil tank, controller and first brake module; wherein, The first brake module includes a proportional valve, and the proportional valve is connected to the controller; The proportional valve comprises a P1 port, a T1 port and an A1 port, the P1 port of the proportional valve is connected to the accumulator, the T1 port of the proportional valve is connected to the oil tank, and the A1 port of the proportional valve is connected to the brake; When the vehicle is in the unmanned driving mode, the controller controls the P1 port and the A1 port of the proportional valve to be connected when the vehicle brakes; when the vehicle releases the brakes, the controller controls the T1 port and the A1 port of the proportional valve to be connected.

2. The hydraulic brake system according to claim 1, characterized in that: The first brake module includes a first driving member, and the proportional valve is a first proportional control valve; The first driving member is connected to the controller and the first proportional control valve respectively; When the vehicle brakes, the controller drives the valve core of the first proportional control valve to move through the first driving member; when the vehicle releases the brakes, the controller drives the valve core of the first proportional control valve to move through the first driving member.

3. The hydraulic brake system according to claim 2, characterized in that: The first proportional control valve comprises: one of a proportional pressure control valve and a proportional brake valve; And / or, the first driving component includes: one of a linear motor, an electric cylinder, and a pneumatic cylinder.

4. The hydraulic brake system according to claim 2, characterized in that: The first brake module further includes an elastic member; The elastic member is connected between the first driving member and the first proportional control valve; When the vehicle brakes, the first driving member drives the valve core of the first proportional control valve to move through the elastic member, and the elastic member is compressed; when the vehicle releases the brake, the elastic member drives the valve core of the first proportional control valve to move.

5. The hydraulic brake system according to claim 1, characterized in that: The proportional valve is a proportional solenoid valve.

6. The hydraulic brake system according to claim 1, characterized in that: The hydraulic brake system also includes a first sensor; The first sensor is connected to the controller; The first sensor is connected between the A1 port of the proportional valve and the brake, and is used to detect the output pressure of the A1 port of the proportional valve and feed it back to the controller.

7. The hydraulic brake system according to claim 1, characterized in that: The hydraulic brake system includes a second sensor; The second sensor is connected to the accumulator and the controller respectively, and is used for detecting the pressure of the accumulator and feeding back the pressure to the controller.

8. The hydraulic brake system according to claim 1, characterized in that: The hydraulic brake system also includes a second brake module and a brake pedal; The second brake module is respectively connected to the brake pedal, the brake, the accumulator and the oil tank; The vehicle is in a manned driving mode. When the vehicle brakes, the brake pedal drives the second brake module to connect the accumulator and the brake; when the vehicle releases the brake, the brake pedal drives the second brake module to connect the brake and the oil tank.

9. The hydraulic brake system according to claim 8, characterized in that: The second brake module includes a hydraulic booster, a first pump and an oil tank, and the hydraulic booster is connected to the brake pedal; The hydraulic booster comprises a P2 port, a T2 port and an A2 port, the P2 port of the hydraulic booster is connected to the accumulator, the T2 port of the hydraulic booster is connected to the oil tank, the A2 port of the hydraulic booster is connected to the first pump, and the first pump is respectively connected to the oil pot and the brake; When the vehicle brakes, the brake pedal controls the P2 port and A2 port of the hydraulic booster to be connected, and the liquid oil in the oil tank flows into the brake through the first pump; when the vehicle releases the brake, the brake pedal controls the T2 port and A2 port of the hydraulic booster to be connected.

10. The hydraulic brake system according to claim 9, characterized in that: The brakes include a front axle brake and a rear axle brake, and the number of the oil pots includes two; The two oil pots are respectively arranged corresponding to the front axle brake and the rear axle brake; The first pump is respectively connected to the corresponding front axle brake and the oil pot to form a first brake oil circuit; the first pump is respectively connected to the corresponding rear axle brake and the oil pot to form a second brake oil circuit.

11. The hydraulic brake system according to claim 10, characterized in that: The first pump is a double-cylinder piston pump; Alternatively, the first pump includes two sub-pumps, both of which are connected to the A2 port of the hydraulic booster, wherein one of the sub-pumps is respectively connected to the corresponding front axle brake and the oil pot, and the other sub-pump is respectively connected to the corresponding rear axle brake and the oil pot.

12. The hydraulic brake system according to claim 8, characterized in that: The second brake module includes a second proportional control valve connected to the brake pedal; The second proportional control valve comprises a P3 port, a T3 port and an A3 port, the P3 port of the second proportional control valve is connected to the accumulator, the T3 port of the second proportional control valve is connected to the oil tank, and the A3 port of the second proportional control valve is connected to the brake; When the vehicle brakes, the brake pedal controls the P3 port and the A3 port of the second proportional control valve to be connected; when the vehicle releases the brake, the brake pedal controls the T3 port and the A3 port of the second proportional control valve to be connected.

13. The hydraulic brake system according to claim 12, characterized in that: The second proportional control valve includes: a proportional pressure control valve and a proportional brake valve.

14. The hydraulic brake system according to claim 8, characterized in that: The hydraulic brake system includes a shuttle valve; The shuttle valve comprises a P4 port, a P5 port and a C port, the P4 port of the shuttle valve is connected to the A1 port of the proportional valve, the P5 port of the shuttle valve is connected to the second brake module, and the C port of the shuttle valve is connected to the brake.

15. The hydraulic brake system according to claim 8, characterized in that: The hydraulic brake system also includes a filter; The filter is disposed between the T1 port of the proportional valve and the oil tank, and the filter is disposed between the second brake module and the oil tank, and is used to filter the liquid oil flowing back to the oil tank.

16. The hydraulic brake system according to claim 1, characterized in that: The hydraulic brake system also includes a second drive member and a second pump; The second driving member is connected to the controller and the second pump respectively, and the controller drives the second pump through the second driving member; The second pump is connected between the accumulator and the oil tank, and is used to pump the liquid oil in the oil tank into the accumulator.

17. The hydraulic brake system according to claim 16, characterized in that: The hydraulic brake system also includes a one-way valve; The one-way valve is connected between the accumulator and the second pump so that the liquid oil in the second pump is transmitted to the accumulator in one direction.

18. The hydraulic brake system according to claim 16, characterized in that: The second driving member includes: one of a motor, an engine, a cylinder, and an electric cylinder.

19. The hydraulic brake system according to claim 16, characterized in that: The hydraulic brake system also includes a safety valve; The safety valve is connected to the controller; The safety valve is connected between the oil tank and one end of the second pump connected to the accumulator.

20. A vehicle, characterized in that: include: A hydraulic brake system as claimed in any one of claims 1 to 19.

Images