Hydraulic brake system, exhaust control method thereof, controller, and vehicle

Abstract

The present application provides a hydraulic brake system, its exhaust control method, controller, and vehicle, and relates to the field of electronic technology in the automotive field. In the hydraulic brake system provided in the present application, the pressurizing assembly can output brake fluid to the brake fluid transmission assembly under the control of the controller. The brake fluid transmission assembly can connect the pressurizing assembly to the brake control assembly or the brake assembly under the control of the controller, and exhaust gas in the assembly connected to the pressurizing assembly. The controller can control the pressurizing assembly and the brake fluid transmission assembly to automatically perform the exhaust operation, and there is no need to manually press the brake pedal for the exhaust process, so that the controller can be applied to the wire-controlled brake system of future vehicles (e.g., intelligent driving vehicles). In addition, since the pressurizing assembly is realized using a motor, a piston, and a pressurizing cylinder, fine adjustment of the discharge amount of brake fluid can be realized.

Description

[Technical field]

[0001] The present invention relates to the field of electronics in the automotive field, and in particular to a hydraulic braking system, an exhaust control method therefor, a controller, and a vehicle. [Background technology]

[0002] The brake system of a vehicle is generally a hydraulic brake system. The hydraulic brake system transmits the pressure of the driver's brake pedal through brake fluid, thereby realizing the braking of the vehicle. Since liquid is incompressible and gas is compressible, in order to realize effective pressure transmission, it is necessary to ensure that the hydraulic brake system is a system filled with brake fluid and does not contain gas.

[0003] In scenarios such as vehicle manufacturing, vehicle development and test operation, and vehicle brake system maintenance, gas may enter the hydraulic brake system. Therefore, it is necessary to vent the gas from the hydraulic brake system in a timely manner to avoid affecting the vehicle's brake performance. When venting the hydraulic brake system, an operator needs to step on the brake pedal and open the exhaust port of the brake wheel cylinder to vent the gas in the hydraulic brake system from the exhaust port.

[0004] However, because the controlled-by-wire braking systems of future vehicles (e.g., autonomous vehicles) do not require manual operation, the manual brake pedal exhaust method is not applicable to the controlled-by-wire braking systems of future vehicles. Summary of the Invention

[0005] The present application provides a hydraulic brake system, an exhaust method thereof, a controller, and a vehicle for solving the problem that a method of exhausting by manually depressing a brake pedal cannot be applied to a wire-controlled brake system.

[0006] In one aspect, the present application provides a hydraulic brake system. The hydraulic brake system includes a pressurizing assembly, a brake fluid transmission assembly, a brake control assembly, and a controller. The pressurizing assembly includes a motor, a piston, and a pressurizing cylinder. The motor is connected to a first end of the piston and the controller, respectively, and a second end of the piston is located in the pressurizing cylinder, and the pressurizing cylinder is connected to the brake fluid transmission assembly and a reservoir, respectively. The brake fluid transmission assembly is further connected to the brake control assembly, the controller, and the brake assembly, respectively. The controller is configured to control the pressurizing assembly to output brake fluid to the brake fluid transmission assembly, and to control the brake fluid transmission assembly to connect the pressurizing cylinder to the brake control assembly or the brake assembly based on an exhaust command, and to exhaust gas in the assembly connected to the pressurizing cylinder.

[0007] The controller can control the pressurizing assembly and the brake fluid transmission assembly to automatically perform the exhaust operation, and the exhaust process does not require the brake pedal to be manually depressed, so that the controller is applicable to the wire-controlled brake system of future vehicles (e.g., autonomous vehicles). In addition, the pressurizing assembly is realized using a motor, a piston, and a pressurizing cylinder, so that the discharge amount of the brake fluid can be finely adjusted to ensure the exhaust effect.

[0008] Optionally, the controller is configured to control the motor to move the piston in the pressurized cylinder in a first direction to draw brake fluid from the reservoir into the pressurized cylinder, or to control the motor to move the piston in the pressurized cylinder in a second direction to output brake fluid in the pressurized cylinder to the brake fluid transmission assembly, the first direction being opposite to the second direction.

[0009] The motor drives the piston to suck the brake fluid into the pressurized cylinder or remove the brake fluid from the pressurized cylinder. This allows the intake and exhaust processes to be performed stably. Accidental errors and erroneous operation caused by manually depressing the brake pedal can be avoided. In addition, the amount of brake fluid sucked in and discharged can be finely adjusted to ensure the exhaust effect.

[0010] Optionally, the second end of the piston divides the pressurizing cylinder into a first cavity and a second cavity, both of which are connected to the reservoir. The brake control assembly includes a brake pedal and a master cylinder connected to the brake pedal. The brake fluid transmission assembly includes a first transmission subassembly, a second transmission subassembly, a third transmission subassembly, a fourth transmission subassembly, and a fifth transmission subassembly. The first transmission subassembly is individually connected to the first cavity, the third transmission subassembly, and the fourth transmission subassembly, the second transmission subassembly is individually connected to the second cavity, the third transmission subassembly, and the fourth transmission subassembly, the third transmission subassembly is further individually connected to the fourth transmission subassembly and the master cylinder, the fourth transmission subassembly is further connected to the brake assembly, and the fifth transmission subassembly is connected to the reservoir and the brake assembly. The controller is configured to control the motor to move the piston in a first direction within the pressurized cylinder to connect the second transmission subassembly, the fourth transmission subassembly, and the fifth transmission subassembly, and to decouple the first transmission subassembly, or to control the motor to move the piston in a second direction within the pressurized cylinder to connect the first transmission subassembly, and to connect the third transmission subassembly or the fourth transmission subassembly.

[0011] In the process of controlling the motor to move the piston in the first direction in the pressurized cylinder, the controller controls the second transmission subassembly, the fourth transmission subassembly, and the fifth transmission subassembly to be connected, so that the brake fluid in the reservoir flows into the pressurized cylinder and the pressurized cylinder is replenished with fluid. Also, since the first transmission subassembly is disconnected in the process, it is possible to prevent air from entering the pressurized cylinder through the first transmission subassembly.

[0012] In the process of the controller controlling the motor to move the piston in a second direction within the pressurized cylinder, venting of the brake control assembly can be performed when the controller controls the first transmission subassembly and the third transmission subassembly to be connected; alternatively, venting of the brake assembly can be performed when the controller controls the first transmission subassembly and the fourth transmission subassembly to be connected.

[0013] Optionally, when the exhaust command is an exhaust command to the brake control assembly, the controller is configured to control the motor to move the piston in the pressurized cylinder in a second direction to connect the first transmission subassembly and the third transmission subassembly and to control the fourth transmission subassembly to disconnect.

[0014] By disconnecting the fourth transmission subassembly when venting the brake control assembly, brake fluid can be prevented from being diverted by the fourth transmission subassembly and sufficient brake fluid can be forced into the brake control assembly.

[0015] Optionally, the brake control assembly further includes a sixth transmission subassembly. The master cylinder includes a front cavity and a rear cavity, the front cavity being closer to the brake pedal than the rear cavity, the front cavity being connected to the reservoir using the sixth transmission subassembly, and the rear cavity being connected to the reservoir. The third transmission subassembly includes a first wheel cylinder control valve and a second wheel cylinder control valve, the first wheel cylinder control valve being individually connected to the front cavity, the first transmission subassembly, and the fourth transmission subassembly, and the second wheel cylinder control valve being individually connected to the rear cavity, the first transmission subassembly, and the fourth transmission subassembly. The controller controls the motor to move the piston in the pressurized cylinder in a second direction, controlling the first transmission subassembly, the first wheel cylinder control valve, the second wheel cylinder control valve, and the sixth transmission subassembly to be connected, and controlling the fourth transmission subassembly to be disconnected; controlling the first transmission subassembly and the second wheel cylinder control valve to connect and controlling the first wheel cylinder control valve and the fourth transmission subassembly to disconnect; controlling the first transmission subassembly, the first wheel cylinder control valve, and the sixth transmission subassembly to be connected, and controlling the second wheel cylinder control valve and the fourth transmission subassembly to be disconnected; and controlling the first transmission subassembly and the first wheel cylinder control valve to be connected, and controlling the second wheel cylinder control valve, the fourth transmission subassembly, and the sixth transmission subassembly to be disconnected.

[0016] The solution provided in this application allows the master cylinder to be vented in several different ways, which effectively improves the flexibility of venting. In addition, there are cases where gas only enters the front or rear cavity of the master cylinder. In this case, the solution provided in this application allows only one cavity of the master cylinder that gas enters to be vented separately, which not only achieves accurate and efficient venting, but also prevents brake fluid from being wasted.

[0017] Optionally, the controller is configured to control the motor to move the piston in the pressurized cylinder in a second direction to connect the first transmission subassembly and the fourth transmission subassembly and to disconnect the third transmission subassembly and the fifth transmission subassembly when the exhaust command is an exhaust command to the brake assembly.

[0018] During the exhaust process of the brake assembly, since the third transmission subassembly is in a disconnected state, it is possible to prevent the brake fluid from being diverted by the third transmission subassembly, and further, it is possible to ensure that sufficient brake fluid is forced into the brake assembly, thereby ensuring the exhaust effect on the brake assembly.

[0019] Optionally, the brake assembly includes a plurality of brake wheel cylinders, the fourth transmission subassembly includes a plurality of fluid inlet valves connected in one-to-one correspondence to the plurality of brake wheel cylinders, and the fifth transmission subassembly includes a plurality of fluid outlet valves connected in one-to-one correspondence to the plurality of brake wheel cylinders. The controller is configured to control the motor to move the piston in the pressurized cylinder in a second direction, to control on the fluid inlet valve connected to the at least one brake wheel cylinder, and to control off the fluid outlet valve connected to the brake wheel cylinder.

[0020] Based on the solution provided in this application, the controller can control some or all of the fluid inlet valves to be on to exhaust some or all of the brake wheel cylinders, thereby effectively improving the flexibility of exhaust.

[0021] Optionally, the exhaust command is an exhaust command for at least one target brake wheel cylinder in the brake assembly. The controller is configured to control the motor to move the piston in the pressurized cylinder in a second direction to control at least one target liquid inlet valve of the plurality of liquid inlet valves to be on and to control liquid inlet valves other than the at least one target liquid inlet valve to be off. The at least one target liquid inlet valve is a liquid inlet valve connected to the at least one target brake wheel cylinder.

[0022] In the solution provided in this application, the controller can vent only the target brake wheel cylinder (i.e., the wheel cylinder into which gas enters) that is in the brake assembly and has the venting requirement according to the venting command indication, and does not need to vent the other brake wheel cylinders that do not need venting, thus not only effectively improving the gas venting efficiency and venting accuracy, but also reducing the waste of brake fluid.

[0023] Optionally, the plurality of brake wheel cylinders in the brake assembly include at least one first brake wheel cylinder and at least one second brake wheel cylinder, the first brake wheel cylinder being individually connected to a first liquid inlet valve of the plurality of liquid inlet valves included in the fourth transmission subassembly and a first liquid outlet valve of the plurality of liquid outlet valves included in the fifth transmission subassembly. The second brake wheel cylinder being individually connected to a second liquid inlet valve of the plurality of liquid inlet valves included in the fourth transmission subassembly and a second liquid outlet valve of the plurality of liquid outlet valves included in the fifth transmission subassembly. The second transmission subassembly includes a first liquid intake control valve and a second liquid intake control valve, the first liquid intake control valve being individually connected to the second cavity and the first liquid inlet valve, and the second liquid intake control valve being individually connected to the second cavity and the second liquid inlet valve. The controller controls the motor to move the piston in the first direction in the pressurizing cylinder, controlling the second liquid suction control valve, the second liquid inflow valve, and the second liquid outflow valve to be on, and controlling the first liquid suction control valve, the first liquid inflow valve, and the first liquid outflow valve to be off; Controlling the first liquid suction control valve, the first liquid inflow valve, and the first liquid outflow valve to ON, and controlling the second liquid suction control valve, the second liquid inflow valve, and the second liquid outflow valve to OFF; and and controlling on the first liquid suction control valve, the first liquid inflow valve, the first liquid outflow valve, the second liquid suction control valve, the second liquid inflow valve, and the second liquid outflow valve.

[0024] In the solution provided in this application, the controller can control the pressurizing assembly in multiple different ways to aspirate the liquid, thereby effectively improving the flexibility of the liquid suction.

[0025] Optionally, the system further includes a pedal feel simulator. The brake fluid transmission assembly further includes a simulator control valve, the simulator control valve being individually connected to the pedal feel simulator, the front cavity of the master cylinder, and the third transmission subassembly. The controller is further configured to: control the motor to move the piston in the pressurized cylinder in a second direction, to connect the first transmission subassembly, the third transmission subassembly, and the simulator control valve, to control the fourth transmission subassembly and the sixth transmission subassembly to be disconnected, and control the motor to move the piston to an upper limit of the stroke in the second direction, to control the third transmission subassembly to be disconnected, and to control the sixth transmission subassembly to be connected, when the exhaust command is an exhaust command for the pedal feel simulator.

[0026] The solution provided in this application can further provide exhaust to the pedal feel simulator, thereby effectively improving the safety and reliability of the hydraulic brake system.

[0027] Optionally, the system further includes a first pressure sensor, the first pressure sensor being connected to the infusion pipeline between the first transmission subassembly and the fourth transmission subassembly. The controller is further configured to: control the pressurizing assembly to output brake fluid to the brake fluid transmission assembly, control the brake fluid transmission assembly to connect the pressurizing cylinder to the brake control assembly or the brake assembly, and then control the first transmission subassembly and the fourth transmission subassembly to be connected, control the third transmission subassembly and the fifth transmission subassembly to be disconnected, and control the pressurizing assembly to output the first target volume of brake fluid to the first transmission subassembly; and output a first prompt indicating that the venting of gas has failed when the controller detects that the pressure value collected by the first pressure sensor is not within a first pressure range corresponding to the first target volume; or output a second prompt indicating that the venting of gas has succeeded when the controller detects that the pressure value collected by the first pressure sensor is within a first pressure range corresponding to the first target volume.

[0028] The controller may further detect the effectiveness of the exhaust based on the pressure value collected by the first pressure sensor, and output a prompt to avoid an unsafe working condition caused due to the exhaust operation not meeting the exhaust standard.

[0029] Optionally, the controller may be further configured to detect whether the pressure value collected by the first pressure sensor is within a first pressure range when the brake fluid output by the pressurizing assembly to the first transmission subassembly reaches a first target volume and the pressure value collected by the first pressure sensor has a fluctuation amplitude within the first target period that is less than a first amplitude threshold; or to output a third prompt indicating low tightness when the brake fluid output by the pressurizing assembly to the first transmission subassembly is controlled to reach the first target volume and the pressure value collected by the first pressure sensor has a fluctuation amplitude within the first target period that is equal to or greater than the first amplitude threshold.

[0030] The controller detects the tightness of the infusion pipeline through the fluctuation amplitude of the pressure value, and outputs the third prompt when the tightness is low, so that the operator can detect and maintain the infusion pipeline in time.

[0031] Optionally, the system further includes a second pressure sensor, the second pressure sensor being connected to the infusion pipeline between the third transmission subassembly and the front cavity of the master cylinder. The controller is further configured to: control the pressurizing assembly to output brake fluid to the brake fluid transmission assembly, and control the brake fluid transmission assembly to connect the pressurizing cylinder to the brake control assembly or the brake assembly, and then control the first transmission subassembly to connect the first wheel cylinder control valve of the third transmission subassembly and control the fourth transmission subassembly and the sixth transmission subassembly to disconnect, and control the pressurizing assembly to output the second target volume of brake fluid to the first transmission subassembly; and output a first prompt indicating that the gas venting has failed when the controller detects that the pressure value collected by the second pressure sensor is not within a second pressure range corresponding to the second target volume; or output a second prompt indicating that the gas venting has succeeded when the controller detects that the pressure value collected by the second pressure sensor is within a second pressure range corresponding to the second target volume.

[0032] In the solution provided herein, the pressurizing assembly is realized by using a motor, a piston, and a pressurizing cylinder, so that precise control of the discharge amount of brake fluid can be realized. Also, the pressure value collected by the pressure sensor can be used to accurately detect the effect of exhaust, so that the dangerous working state caused by the exhaust operation not meeting the exhaust standard can be avoided. Moreover, when the system includes both the first pressure sensor and the second pressure sensor, the controller can detect the effect of exhaust based on multiple different methods, which effectively improves the flexibility and reliability of detecting the effect of exhaust.

[0033] Optionally, the controller is further configured to detect whether the pressure value collected by the second pressure sensor is within a second pressure range when the brake fluid output by the pressurizing assembly to the first transmission subassembly is controlled to reach a second target volume and the pressure value collected by the second pressure sensor has a fluctuation amplitude within the second target period that is less than a second amplitude threshold; or to output a third prompt indicating low tightness when the brake fluid output by the pressurizing assembly to the first transmission subassembly is controlled to reach the second target volume and the pressure value collected by the second pressure sensor has a fluctuation amplitude within the second target period that is equal to or greater than the second amplitude threshold.

[0034] Optionally, the system further includes a liquid infusion pipeline for delivering brake fluid. The controller is further configured to control the pressurizing assembly to perform a decompression operation when detecting that the pressure value of the liquid infusion pipeline is greater than a pressure threshold. Thus, the dangerous working state of a sudden pressure change caused by the pipeline blockage or the like can be effectively avoided, and the safety of the exhaust process can be ensured.

[0035] Optionally, the controller is configured to control the pressurizing assembly and the brake fluid transmission assembly to repeat the exhaust operation a target number of times based on the exhaust command, the target number being greater than one, and the exhaust operation includes the pressurizing assembly outputting brake fluid to the brake fluid transmission assembly and the brake fluid transmission assembly connecting the pressurized cylinder to the brake control assembly or the brake assembly.

[0036] The controller controls the pressurizing assembly and the brake fluid transmitting assembly to repeat the exhaust operation multiple times, so as to effectively ensure the exhaust effect.

[0037] Optionally, the controller is configured to control the pressurizing assembly to output brake fluid to the brake fluid transmission assembly at a first rate when performing an nth exhaust operation, and to output brake fluid to the brake fluid transmission assembly at a second rate when performing an (n+1)th exhaust operation, where n is a positive integer less than the target number, and the second rate is greater than the first rate.

[0038] Since the pressure in the infusion pipeline in the hydraulic brake system tends to stabilize with increasing number of exhaust operations, the controller may control the pressurizing assembly to gradually increase the speed of outputting brake fluid, thus effectively improving the exhaust efficiency under the premise of ensuring the safe execution of the exhaust operation.

[0039] Optionally, the system further includes a fluid level sensor located in the reservoir and connected to the controller. The controller is further configured to output a fourth prompt when the fluid level in the reservoir collected by the fluid level sensor is below a fluid level threshold. The fourth prompt can be used to prompt an operator to refill brake fluid in a timely manner to ensure that the venting operation can be performed normally.

[0040] In another aspect, the present application provides a method for controlling exhaust of a hydraulic brake system, which is applied to a controller in the system. The system further includes a pressurizing assembly, a brake fluid transmission assembly, and a brake control assembly. The pressurizing assembly includes a motor, a piston, and a pressurizing cylinder, the motor being connected to a first end of the piston and the controller, respectively, and a second end of the piston being located in the pressurizing cylinder, and the pressurizing cylinder being connected to the brake fluid transmission assembly and the reservoir, respectively. The brake fluid transmission assembly is further connected to the brake control assembly, the controller, and the brake assembly, respectively. The method includes the steps of obtaining an exhaust command; controlling the pressurizing assembly to output brake fluid to the brake fluid transmission assembly, and controlling the brake fluid transmission assembly to connect the pressurizing cylinder to the brake control assembly or the brake assembly based on the exhaust command, and exhausting gas in the assembly connected to the pressurizing cylinder;

[0041] Optionally, prior to controlling the pressurizing assembly to output brake fluid to the brake fluid transmission assembly based on the exhaust command, the method further includes controlling the motor to move a piston in the pressurizing cylinder in a first direction to draw brake fluid from the reservoir into the pressurizing cylinder based on the exhaust command. Controlling the pressurizing assembly to output brake fluid to the brake fluid transmission assembly includes controlling the motor to move a piston in the pressurizing cylinder in a second direction to output brake fluid in the pressurizing cylinder to the brake fluid transmission assembly, the first direction being opposite to the second direction.

[0042] Optionally, the second end of the piston divides the pressurizing cylinder into a first cavity and a second cavity, both of which are connected to the reservoir. The brake control assembly includes a brake pedal and a master cylinder connected to the brake pedal. The brake fluid transmission assembly includes a first transmission subassembly, a second transmission subassembly, a third transmission subassembly, a fourth transmission subassembly, and a fifth transmission subassembly. The first transmission subassembly is individually connected to the first cavity, the third transmission subassembly, and the fourth transmission subassembly, the second transmission subassembly is individually connected to the second cavity, the third transmission subassembly, and the fourth transmission subassembly, the third transmission subassembly is further individually connected to the fourth transmission subassembly and the master cylinder, the fourth transmission subassembly is further connected to the brake assembly, and the fifth transmission subassembly is connected to the reservoir and the brake assembly.

[0043] The step of controlling the motor to move the piston in the pressurizing cylinder in a first direction to draw brake fluid from the reservoir into the pressurizing cylinder may include the steps of controlling the motor to move the piston in the pressurizing cylinder in a first direction to connect the second transmission subassembly, the fourth transmission subassembly, and the fifth transmission subassembly, and controlling the motor to disconnect the first transmission subassembly. The process of controlling the brake fluid transmission assembly to connect the pressurizing assembly to the brake control assembly or the brake assembly includes the steps of controlling the motor to move the piston in the pressurizing cylinder in a second direction to connect the first transmission subassembly, and control the motor to connect the third transmission subassembly or the fourth transmission subassembly.

[0044] Optionally, when the exhaust command is an exhaust command to the brake control assembly, the step of controlling the first transmission subassembly to be connected and controlling the third transmission subassembly or the fourth transmission subassembly to be connected includes the step of controlling the first transmission subassembly and the third transmission subassembly to be connected and controlling the fourth transmission subassembly to be disconnected.

[0045] Optionally, the brake control assembly further includes a sixth transmission subassembly. The master cylinder includes a front cavity and a rear cavity, the front cavity being closer to the brake pedal than the rear cavity, the front cavity being connected to the reservoir using the sixth transmission subassembly, and the rear cavity being connected to the reservoir. The third transmission subassembly includes a first wheel cylinder control valve and a second wheel cylinder control valve, the first wheel cylinder control valve being connected to the front cavity, the first transmission subassembly, and the fourth transmission subassembly, respectively, and the second wheel cylinder control valve being connected to the rear cavity, the first transmission subassembly, and the fourth transmission subassembly, respectively. The step of controlling the first transmission subassembly and the third transmission subassembly to be connected and controlling the fourth transmission subassembly to be disconnected includes: controlling the first transmission subassembly, the first wheel cylinder control valve, the second wheel cylinder control valve, and the sixth transmission subassembly to be connected, and controlling the fourth transmission subassembly to be disconnected; controlling the first transmission subassembly and the second wheel cylinder control valve to be connected and controlling the first wheel cylinder control valve and the fourth transmission subassembly to be disconnected; controlling the first transmission subassembly, the first wheel cylinder control valve, and the sixth transmission subassembly to be connected, and controlling the second wheel cylinder control valve and the fourth transmission subassembly to be disconnected; and The method includes at least one of the following embodiments: controlling the first transmission subassembly and the first wheel cylinder control valve to be connected, and controlling the second wheel cylinder control valve, the fourth transmission subassembly, and the sixth transmission subassembly to be disconnected.

[0046] Optionally, when the exhaust command is an exhaust command for the brake assembly, the step of controlling to connect the first transmission subassembly and controlling to connect the third transmission subassembly or the fourth transmission subassembly includes the step of controlling to connect the first transmission subassembly and the fourth transmission subassembly and controlling to disconnect the third transmission subassembly and the fifth transmission subassembly.

[0047] Optionally, the brake assembly includes a plurality of brake wheel cylinders, the fourth transmission subassembly includes a plurality of fluid inlet valves connected in one-to-one correspondence to the plurality of brake wheel cylinders, and the fifth transmission subassembly includes a plurality of fluid outlet valves connected in one-to-one correspondence to the plurality of brake wheel cylinders. The step of controlling the first transmission subassembly and the fourth transmission subassembly to be connected and the step of controlling the third transmission subassembly and the fifth transmission subassembly to be disconnected include the steps of turning on a fluid inlet valve connected to at least one of the brake wheel cylinders and controlling off a fluid outlet valve connected to the brake wheel cylinders.

[0048] Optionally, the exhaust command is an exhaust command for at least one target brake wheel cylinder in the brake assembly. Controlling on at least one of the plurality of fluid inlet valves includes controlling on at least one target fluid inlet valve of the plurality of fluid inlet valves, the at least one target fluid inlet valve being a fluid inlet valve connected to the at least one target brake wheel cylinder. The method further includes controlling off the fluid inlet valves other than the at least one target fluid inlet valve.

[0049] Optionally, the plurality of brake wheel cylinders in the brake assembly include at least one first brake wheel cylinder and at least one second brake wheel cylinder. The first brake wheel cylinder is individually connected to a first liquid inlet valve of the plurality of liquid inlet valves included in the fourth transmission subassembly and a first liquid outlet valve of the plurality of liquid outlet valves included in the fifth transmission subassembly. The second brake wheel cylinder is individually connected to a second liquid inlet valve of the plurality of liquid inlet valves included in the fourth transmission subassembly and a second liquid outlet valve of the plurality of liquid outlet valves included in the fifth transmission subassembly. The second transmission subassembly includes a first liquid intake control valve and a second liquid intake control valve. The first liquid intake control valve is individually connected to the second cavity and the first liquid inlet valve, and the second liquid intake control valve is individually connected to the second cavity and the second liquid inlet valve. The step of controlling to connect the second transmission subassembly, the fourth transmission subassembly, and the fifth transmission subassembly includes: controlling the second liquid suction control valve, the second liquid inflow valve, and the second liquid outflow valve to be on, and controlling the first liquid suction control valve, the first liquid inflow valve, and the first liquid outflow valve to be off; Controlling the first liquid suction control valve, the first liquid inflow valve, and the first liquid outflow valve to ON, and controlling the second liquid suction control valve, the second liquid inflow valve, and the second liquid outflow valve to OFF; and The method includes at least one of the following embodiments: controlling the first liquid intake control valve, the first liquid inlet valve, the first liquid outlet valve, the second liquid intake control valve, the second liquid inlet valve, and the second liquid outlet valve to on.

[0050] Optionally, the system further includes a pedal feel simulator. The brake fluid transmission assembly further includes a simulator control valve, the simulator control valve being connected to the pedal feel simulator, the front cavity of the master cylinder, and the third transmission subassembly, respectively. When the exhaust command is an exhaust command for the pedal feel simulator, the method further includes: controlling the motor to move the piston in the pressurized cylinder in a second direction to connect the first transmission subassembly, the third transmission subassembly, and the simulator control valve, and controlling the fourth transmission subassembly and the sixth transmission subassembly to be disconnected; controlling the motor to move the piston to an upper limit of the stroke in the second direction to control the third transmission subassembly to be disconnected, and controlling the sixth transmission subassembly to be connected.

[0051] Optionally, the system further includes a first pressure sensor, the first pressure sensor being connected to the infusion pipeline between the first transmission subassembly and the fourth transmission subassembly. The method further includes the steps of controlling the pressurizing assembly to output brake fluid to the brake fluid transmission assembly, controlling the brake fluid transmission assembly to connect the pressurizing cylinder to the brake control assembly or the brake assembly, and then controlling the first transmission subassembly and the fourth transmission subassembly to be connected, controlling the third transmission subassembly and the fifth transmission subassembly to be disconnected, and controlling the pressurizing assembly to output the first target volume of brake fluid to the first transmission subassembly; and outputting a first prompt indicating that the venting of gas has failed when detecting that the pressure value collected by the first pressure sensor is not within a first pressure range corresponding to the first target volume; or outputting a second prompt indicating that the venting of gas has succeeded when detecting that the pressure value collected by the first pressure sensor is within a first pressure range corresponding to the first target volume.

[0052] Optionally, the method includes detecting whether a pressure value collected by the first pressure sensor is within a first pressure range when the brake fluid output by the pressurizing assembly to the first transmission subassembly reaches a first target volume and a pressure value collected by the first pressure sensor has a fluctuation amplitude within the first target period that is less than a first amplitude threshold; or outputting a third prompt indicating low tightness when the brake fluid output by the pressurizing assembly to the first transmission subassembly reaches a first target volume and a pressure value collected by the first pressure sensor has a fluctuation amplitude within the first target period that is equal to or greater than the first amplitude threshold.

[0053] Optionally, the system further includes a second pressure sensor, the second pressure sensor being connected to the infusion pipeline between the third transmission subassembly and the front cavity of the master cylinder. The method further includes the steps of controlling the pressurizing assembly to output brake fluid to the brake fluid transmission assembly, controlling the brake fluid transmission assembly to connect the pressurizing cylinder to the brake control assembly or the brake assembly, controlling the first transmission subassembly to connect with the first wheel cylinder control valve of the third transmission subassembly, controlling the fourth transmission subassembly and the sixth transmission subassembly to disconnect, and controlling the pressurizing assembly to output the second target volume of brake fluid to the first transmission subassembly; and outputting a first prompt indicating that the venting of gas has failed when detecting that the pressure value collected by the second pressure sensor is not within a second pressure range corresponding to the second target volume; or outputting a second prompt indicating that the venting of gas has succeeded when detecting that the pressure value collected by the second pressure sensor is within a second pressure range corresponding to the second target volume.

[0054] Optionally, the method further includes detecting whether the pressure value collected by the second pressure sensor is within a second pressure range when the brake fluid output by the pressurizing assembly to the first transmission subassembly reaches a second target volume and the pressure value collected by the second pressure sensor has a fluctuation amplitude within the second target period that is less than a second amplitude threshold; or outputting a third prompt indicating low tightness when the brake fluid output by the pressurizing assembly to the first transmission subassembly reaches a second target volume and the pressure value collected by the second pressure sensor has a fluctuation amplitude within the second target period that is less than a second amplitude threshold.

[0055] Optionally, the system further includes a fluid infusion pipeline for delivering brake fluid.The method further includes controlling the pressurizing assembly to perform a depressurizing operation when detecting that the pressure value of the fluid infusion pipeline is greater than a pressure threshold.

[0056] Optionally, the step of controlling the pressurizing assembly and the brake fluid transmission assembly to perform the exhaust operation based on the exhaust command includes the step of controlling the pressurizing assembly and the brake fluid transmission assembly to repeatedly perform the exhaust operation a target number of times based on the exhaust command, the target number being greater than one, and the exhaust operation including the pressurizing assembly outputting brake fluid to the brake fluid transmission assembly and the brake fluid transmission assembly connecting the pressurized cylinder to the brake control assembly or the brake assembly.

[0057] Optionally, the step of controlling the pressurizing assembly and the brake fluid transmission assembly to repeatedly perform the exhaust operation a target number of times includes: controlling the pressurizing assembly to output brake fluid to the brake fluid transmission assembly at a first speed when performing the nth exhaust operation; and controlling the pressurizing assembly to output brake fluid to the brake fluid transmission assembly at a second speed when performing the (n+1)th exhaust operation, where n is a positive integer smaller than the target number and the second speed is greater than the first speed.

[0058] Optionally, the system further includes a level sensor located in the reservoir and connected to the controller. The method further includes outputting a fourth prompt when a level in the reservoir collected by the level sensor is below a level threshold.

[0059] It should be understood that for the technical effects of the exhaust control method provided in the above embodiment, please refer to the description of the effects in the hydraulic brake system above, and the details will not be described again here.

[0060] According to yet another aspect, a computer readable storage medium is provided having instructions stored thereon that, when executed on a controller, enable the controller to perform the emission control method provided in the above aspect.

[0061] According to yet another aspect, a controller is provided for application in a hydraulic brake system. The hydraulic brake system further includes a pressurizing assembly, a brake fluid transmission assembly, and a brake control assembly. The pressurizing assembly includes a motor, a piston, and a pressurizing cylinder, the motor being connected to a first end of the piston and the controller, respectively, and a second end of the piston being located in the pressurizing cylinder, the pressurizing cylinder being disposed in the brake fluid transmission assembly and a reservoir, respectively, and the pressurizing cylinder can obtain brake fluid from the reservoir. The brake fluid transmission assembly is further connected to the brake control assembly, the controller, and the brake assembly, respectively. The controller includes a programmable logic circuit and / or program instructions, and the controller is configured to implement the exhaust control method provided in the above aspect.

[0062] In yet another aspect, a vehicle is provided that includes a reservoir, a brake assembly, and a hydraulic brake system as provided in the above aspect, wherein the reservoir is configured to store brake fluid.

[0063] Optionally, the reservoir includes a first liquid storage cavity, a second liquid storage cavity, and a third liquid storage cavity spaced apart, the first liquid storage cavity being individually connected to a pressurizing assembly and a fifth transmission subassembly of the hydraulic brake system, the second liquid storage cavity being connected to a rear cavity of a master cylinder of the hydraulic brake system, and the third liquid storage cavity being connected to a sixth transmission subassembly of the hydraulic brake system.

[0064] Optionally, the vehicle may be an autonomous vehicle, a remotely driven vehicle, an air vehicle, or the like.

[0065] The technical solution provided in this application includes at least the following beneficial effects:

[0066] The present invention provides a hydraulic brake system, its exhaust control method, a controller, and a vehicle. The controller can control the pressurizing assembly and the brake fluid transmission assembly of the hydraulic brake system to automatically perform the exhaust operation, and the exhaust process does not require the brake pedal to be manually depressed, so that the controller can be applied to the system wire control brake of future vehicles (such as intelligent driving vehicles). In addition, the pressurizing assembly is realized using a motor, a piston, and a pressurizing cylinder, so that the discharge amount of the brake fluid can be finely adjusted to ensure the exhaust effect. [Brief description of the drawings]

[0067] [Figure 1] 1 is a schematic diagram illustrating the structure of a hydraulic brake system according to an embodiment of the present application. [Diagram 2] FIG. 2 is another schematic diagram illustrating the structure of a hydraulic brake system according to an embodiment of the present application. [Diagram 3] FIG. 2 is a schematic diagram showing a transmission path of brake fluid in a fluid suction process according to an embodiment of the present application. [Figure 4] FIG. 2 is a schematic diagram showing a brake fluid transmission path when venting the master cylinder according to an embodiment of the present application. [Diagram 5] FIG. 2 is a schematic diagram illustrating the brake fluid transmission path when venting the rear cavity of the master cylinder according to one embodiment of the present application. [Figure 6] FIG. 2 is a schematic diagram illustrating the brake fluid transmission path when venting the front cavity of the master cylinder according to one embodiment of the present application. [Figure 7] FIG. 13 is a schematic diagram illustrating another brake fluid transmission path when venting the rear cavity of the master cylinder according to an embodiment of the present application. [Figure 8] FIG. 2 is a schematic diagram showing a transmission path of brake fluid when exhausting a brake wheel cylinder according to an embodiment of the present application. [Figure 9] FIG. 11 is a schematic diagram showing another transmission path of brake fluid in the fluid suction process according to an embodiment of the present application. [Figure 10] FIG. 11 is a schematic diagram showing yet another transmission path of brake fluid in the fluid suction process according to an embodiment of the present application. [Figure 11] FIG. 2 is a schematic diagram illustrating a brake fluid transmission path in a fluid introduction process of the pedal feel simulator according to an embodiment of the present application. [Figure 12] FIG. 2 is a schematic diagram illustrating a brake fluid transmission path when venting a pedal feel simulator according to an embodiment of the present application. [Figure 13] FIG. 2 is a schematic diagram illustrating brake fluid transmission paths when detecting the effect of exhaust according to an embodiment of the present application. [Figure 14] FIG. 13 is a schematic diagram illustrating another brake fluid transmission path when detecting the effect of exhaust according to an embodiment of the present application. [Figure 15A] 2 is a flow chart of an exhaust control method according to an embodiment of the present application. [Figure 15B] 2 is a flow chart of an exhaust control method according to an embodiment of the present application. [Figure 16] 2 is a flow chart of an exhaust operation method according to an embodiment of the present application. [Figure 17] 4 is a flow chart of another exhaust control method according to an embodiment of the present application. [Figure 18]FIG. 2 is a schematic diagram illustrating the structure of a controller according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0068] In order to make the objectives, technical solutions and advantages of the present application clearer, the following describes the embodiments of the present application in more detail with reference to the accompanying drawings.

[0069] One embodiment of the present application provides a hydraulic brake system. As shown in FIG. 1, the hydraulic brake system includes a pressurizing assembly 10, a brake fluid transmission assembly 20, a brake control assembly 30, and a controller 40.

[0070] The pressurizing assembly 10 includes a motor (M) 11, a piston 12, and a pressurizing cylinder 13. The motor 11 is connected to a first end of the piston 12 and to a controller 40, respectively, and a second end of the piston 12 is located in the pressurizing cylinder 13, which is connected to a brake fluid transmission assembly 20 and a reservoir 01, respectively.

[0071] The brake fluid transmission assembly 20 is further connected to the brake control assembly 30 and the controller 40, respectively, and the brake fluid transmission assembly 20 is further configured to connect the brake assembly 02 and the reservoir 01.

[0072] 1, the controller 40 is connected to the motor 11 of the pressurizing assembly 10 and the brake fluid transmission assembly 20 using a signal cable. The brake fluid transmission assembly 20 is connected to the brake control assembly 30, the brake assembly 02, and the reservoir 01 via a fluid infusion pipeline, and the pressurizing cylinder 13 in the pressurizing assembly 10 is also connected to the reservoir 01 via a fluid infusion pipeline.

[0073] The controller 40 is configured to control the pressurizing assembly 10 to output brake fluid to the brake fluid transmission assembly 20, and based on an exhaust command, control the brake fluid transmission assembly 20 to connect the pressurizing cylinder 13 to the brake control assembly 30 or the brake assembly 02, and exhaust gas within the assembly connected to the pressurizing cylinder 13. That is, the controller 40 can control the pressurizing assembly 10 and the brake fluid transmission assembly 20 to perform the exhaust operation.

[0074] When the pressurizing cylinder 13 is connected to the brake control assembly 30 by the brake fluid transmission assembly 20, the pressurizing cylinder 13 outputs brake fluid to the brake control assembly 30, thereby enabling the exhaust of the brake control assembly 30. When the pressurizing cylinder 13 is connected to the brake assembly 02 by the brake fluid transmission assembly 20, the pressurizing cylinder 130 outputs brake fluid to the brake assembly 02, thereby enabling the exhaust of the brake assembly 02.

[0075] In conclusion, this embodiment of the present application provides a hydraulic brake system. A pressurizing assembly in the system can output brake fluid to a brake fluid transmission assembly under the control of a controller. The brake fluid transmission assembly can connect the pressurizing assembly to a brake control assembly or a brake assembly under the control of a controller to exhaust gas in an assembly connected to the pressurizing assembly. The controller can control the pressurizing assembly and the brake fluid transmission assembly to automatically perform the exhaust operation, and there is no need to manually press the brake pedal for the exhaust process, so that the controller is applicable to the wire-controlled brake system of future vehicles (e.g., intelligent driving vehicles). In addition, the pressurizing assembly is realized using a motor, a piston, and a pressurizing cylinder, so that fine adjustment of the discharge amount of brake fluid can be realized.

[0076] Optionally, the controller 40 may be an electronic control unit (ECU). The exhaust command may be triggered to be generated based on a variety of different methods. For example, an operator may operate a specific touch button to trigger the generation of the exhaust command. The specific touch button may be a virtual button on an in-vehicle control panel or a physical button on the vehicle. Alternatively, the controller 40 may further connect to an external vehicle diagnostic device, which may transmit the exhaust command to the controller 40. Alternatively, an operator may perform a specific combination of operations on the brake control assembly 30 (e.g., pressing the brake pedal multiple times at regular intervals) to trigger the generation of the exhaust command, which may be referred to as a backdoor trigger.

[0077] Fig. 2 is a schematic diagram showing the structure of another hydraulic brake system according to an embodiment of the present application. Please refer to Fig. 2. The controller 40 is configured to control the motor 11 to move the piston 12 in the pressurizing cylinder 13 in a first direction x to draw brake fluid from the reservoir 01 into the pressurizing cylinder 13, or to control the motor 11 to move the piston 12 in the pressurizing cylinder 13 in a second direction y to output brake fluid in the pressurizing cylinder 13 to the brake fluid transmission assembly 20. That is, the controller 40 controls the motor 11 to move the piston 12 in the pressurizing cylinder 13, thereby realizing automatic drawing and discharging of brake fluid.

[0078] The first direction x is opposite to the second direction y, see for example Figure 2. The first direction x is toward the motor 11, and the second direction y is away from the motor 11.

[0079] The controller 40 can control the direction of movement of the piston 12 by controlling the direction of rotation of the motor 11. For example, when the controller 40 controls the motor 11 to rotate in a reverse direction, the motor 11 can move the piston 12 in a first direction x in the pressurized cylinder 13. When the controller 40 controls the motor 11 to rotate in a forward direction, the motor 11 can move the piston 12 in a second direction y in the pressurized cylinder 13. See FIG. 2 further. The pressurizing assembly 10 may further include a speed reduction mechanism 14, and the motor 11 may be connected to the first end of the piston 12 using the speed reduction mechanism 14.

[0080] Optionally, the motor 11 can be a three-phase brushless motor, which can precisely control the movement of the piston 12 to precisely control the suction and discharge volume of the pressurizing cylinder 13 and ensure the exhaust effect.

[0081] In the system provided in this embodiment of the present application, the pressurizing assembly 10 may also be referred to as a dual apply pump (DAP) since the motor 11 can move the piston 12 in two different directions under the control of the controller 40.

[0082] 3 is a schematic diagram showing the structure of yet another hydraulic brake system according to an embodiment of the present application. As shown in FIG. 3, the second end of the piston 12 can divide the pressurizing cylinder 13 into a first cavity 131 and a second cavity 132. Both the first cavity 131 and the second cavity 132 are connected to the reservoir 01, and the second cavity 132 is closer to the motor 11 than the first cavity 131.

[0083] For example, see FIG. 3. The pressurizing assembly 10 may further include a one-way valve 15, and the first cavity 131 may be connected to the reservoir 01 through the one-way valve 15. The one-way valve 15 is configured to prevent the brake fluid in the first cavity 131 from flowing into the reservoir 01. In addition, an adjustment hole 133 is further provided on the side of the pressurizing cylinder 13 close to the motor 11, and the reservoir 01 is further connected to the adjustment hole 133 through an infusion pipeline. The piston 12 is further provided with a guide groove. After the piston 12 moves to the upper limit of the stroke in the first direction x, the guide groove may be aligned with the adjustment hole 133, and the brake fluid in the reservoir 01 may flow into the second cavity 132 through the adjustment hole 133 and the guide groove. After the piston 12 moves in the second direction y, the guide groove is no longer aligned with the adjustment hole 133. That is, the piston 12 may block the adjustment hole 133, and the brake fluid in the reservoir 01 cannot flow into the second cavity 132.

[0084] It should be understood that the first cavity 131 and the second cavity 132 are not two cavities having fixed volumes, since the piston 12 can move within the pressurizing cylinder 13. That is, the volumes of the first cavity 131 and the second cavity 132 can change as the piston 12 moves.

[0085] Continuing to refer to FIG. 3, the brake control assembly 30 includes a brake pedal 31 and a master cylinder connected to the brake pedal 31. The brake fluid transmission assembly 20 may include a first transmission subassembly 21, a second transmission subassembly 22, a third transmission subassembly 23, a fourth transmission subassembly 24, and a fifth transmission subassembly 25. The first transmission subassembly 21 is connected to the first cavity 131, the third transmission subassembly 23, and the fourth transmission subassembly 24, respectively. The second transmission subassembly 22 is connected to the second cavity 132, the third transmission subassembly 23, and the fourth transmission subassembly 24, respectively. The third transmission subassembly 23 is further connected to the fourth transmission subassembly 24 and the master cylinder 32, respectively. The fourth transmission subassembly 24 is further connected to the brake assembly 02. The fifth transmission subassembly 25 is further connected to the reservoir 01 and the brake assembly 02.

[0086] In response, the controller 40 may be configured to control the motor 11 to move the piston 12 in the pressurizing cylinder 13 in the first direction x to connect the second transmission subassembly 22, the fourth transmission subassembly 24, and the fifth transmission subassembly 25, and to disconnect the first transmission subassembly 21. In this case, brake fluid may flow from the reservoir 01 into the first cavity 131, which may also be referred to as a suction process or a fluid refill process.

[0087] In the above-mentioned suction process, the first transmission subassembly 21 is controlled to be disconnected, and a vacuum negative pressure can be formed in the first cavity 131 (also called the pressurized cavity) of the pressurized cylinder 13. In this way, the brake fluid in the reservoir 01 can flow to the first cavity 131 through the one-way valve 15. Also, since the first transmission subassembly 21 is disconnected, it is possible to prevent air from entering the first cavity through the first transmission subassembly 21.

[0088] In addition, in the liquid suction process, the second transmission subassembly 22, the fourth transmission subassembly 24, and the fifth transmission subassembly 25 are connected. Therefore, as shown by the thick black line in Fig. 3, the reservoir 01, the second cavity 132, and the above-mentioned transmission subassemblies in the connected state form a brake fluid transmission circuit. Furthermore, since it can be ensured that the motor 11 can move the piston 12 in the first direction x to the upper limit of the stroke (i.e., the piston 12 can be fully retracted), the volume of the first cavity 131 is large enough to suck in more brake fluid.

[0089] Furthermore, the controller 40 may be further configured to control the motor 11 to move the piston 12 in the pressure cylinder 13 in the second direction y to connect the first transmission subassembly 21, and to control the motor 11 to connect the third transmission subassembly 23 or the fourth transmission subassembly 24.

[0090] In this case, the brake fluid can be transmitted to the brake control assembly 30 or the brake assembly 02 through the connected transmission subassembly, thereby realizing exhaust to the brake control assembly 30 or the brake assembly 02. This process may also be called an exhaust process. Also, during the exhaust process, the second transmission subassembly 22 may be disconnected or connected, which is not limited in this embodiment of the present application.

[0091] Optionally, in this embodiment of the present application, the exhaust command may be an exhaust command to the brake control assembly 30 or may be an exhaust command to the brake assembly 02. In response, the controller 40 may vent to different components in the hydraulic brake system based on the type of exhaust command, thereby effectively increasing exhaust flexibility.

[0092] In an optional implementation of this embodiment of the present application, when the exhaust command is an exhaust command for the brake control assembly 30, the controller 40 may be configured to control the motor 11 to move the piston 12 in the pressurizing cylinder 13 in the second direction y to connect the first transmission subassembly 21 and the third transmission subassembly 23, and to disconnect the fourth transmission subassembly 24. In this case, the brake fluid in the first cavity 131 can flow into the brake control assembly 30 through the first transmission subassembly 21 and the third transmission subassembly 23. And, since the brake control assembly 30 is further connected to the reservoir 01, the brake fluid in the brake control assembly 30 can also flow into the reservoir 01. In this way, exhaust for the brake control assembly 30 can be performed.

[0093] By disconnecting the fourth transmission subassembly 24 when venting the brake control assembly 30, brake fluid can be prevented from being diverted by the fourth transmission subassembly 24 and ensure that sufficient brake fluid is forced into the brake control assembly 30.

[0094] Optionally, as shown in Fig. 4, the brake fluid transmission assembly 20 may further include a sixth transmission subassembly 26. The master cylinder 32 includes a front cavity 321 and a rear cavity 322. The front cavity 321 is closer to the brake pedal 31 than the rear cavity 322, and the front cavity 322 is connected to the reservoir 01 using the sixth transmission subassembly 26. The rear cavity 322 is configured to be directly connected to the reservoir 01 via a fluid inflow pipeline.

[0095] The third transmission subassembly 23 includes a first wheel cylinder control valve 3a and a second wheel cylinder control valve 3b. The first wheel cylinder control valve 3a is connected to the front cavity 321, the first transmission subassembly 21, and the fourth transmission subassembly 24, respectively. The second wheel cylinder control valve 3b is connected to the rear cavity 322, the first transmission subassembly 21, and the fourth transmission subassembly 24, respectively.

[0096] The controller 40 is configured to control the motor 11 to move the piston 12 in the pressure cylinder 13 in the second direction y to perform at least one of the following operations:

[0097] Operation 1.1: The first transmission subassembly 21, the first wheel cylinder control valve 3a, the second wheel cylinder control valve 3b, and the sixth transmission subassembly 26 are controlled to be connected, and the fourth transmission subassembly 24 is controlled to be disconnected.

[0098] Please refer to the thick black line in Fig. 4. In this case, the brake fluid in the first cavity 131 can flow into the reservoir 01 through the first transmission subassembly 21, the first wheel cylinder control valve 3a, the front cavity 321, and the sixth transmission subassembly 26, and can flow into the reservoir 01 through the first transmission subassembly 21, the second wheel cylinder control valve 3b, and the rear cavity 322. In this way, the front cavity 321 and the rear cavity 322 can be simultaneously exhausted.

[0099] Operation 1.2: The first transmission sub-assembly 21 and the second wheel cylinder control valve 3b are controlled to be connected, and the first wheel cylinder control valve 3a and the fourth transmission sub-assembly 24 are controlled to be disconnected.

[0100] Please refer to the thick black line in Fig. 5. In this case, the brake fluid in the first cavity 131 can flow into the reservoir 01 through the first transmission subassembly 21, the second wheel cylinder control valve 3b, and the rear cavity 322. Since the first wheel cylinder control valve 3a is turned off, the brake fluid in the first cavity 131 is no longer transmitted to the front cavity 321. In this way, separate exhaust for the rear cavity 322 can be achieved.

[0101] Operation 1.3: Control the first transmission subassembly 21, the first wheel cylinder control valve 3a, and the sixth transmission subassembly 26 to be connected, and control the second wheel cylinder control valve 3b and the fourth transmission subassembly 24 to be disconnected.

[0102] Please refer to the thick black line in Fig. 6. In this case, the brake fluid in the first cavity 131 can flow into the reservoir 01 through the first transmission subassembly 21, the first wheel cylinder control valve 3a, the front cavity 321, and the sixth transmission subassembly 26. Since the wheel cylinder control valve 3b is turned off, the brake fluid in the first cavity 131 is not transmitted to the rear cavity 322. In this way, individual exhaust for the front cavity 321 can be achieved.

[0103] Operation 1.4: The first transmission subassembly 21 and the first wheel cylinder control valve 3a are controlled to be connected, and the second wheel cylinder control valve 3b, the fourth transmission subassembly 24, and the sixth transmission subassembly 26 are controlled to be disconnected.

[0104] Please refer to the thick black line in FIG. 7. In this case, the brake fluid in the first cavity 131 can flow into the front cavity 321 through the first transmission subassembly 21 and the first wheel cylinder control valve 3a. Since both the second wheel cylinder control valve 3b and the sixth transmission subassembly 26 are disconnected, the pressure in the front cavity 321 is transmitted to the rear cavity 322 through the piston in the front cavity 321, thereby achieving the purpose of emptying the air in the wheel cylinder. That is, based on this operation 1.4, an individual exhaust for the rear cavity 322 can be performed.

[0105] In this embodiment of the present application, operations 1.1-1.4 can be used to vent different cavities of the master cylinder 32, thereby effectively improving the flexibility of venting. Furthermore, in some scenarios, gas may only enter the front cavity 321 or the rear cavity 322 in the master cylinder 32. In this case, the solution provided in this embodiment of the present application can be used, and only one cavity through which gas enters the master cylinder 32 is vented separately. This allows for precise and efficient venting.

[0106] Optionally, in operations 1.1 to 1.4, the controller 40 may control the second transmission subassembly 22 to be connected or to be disconnected. For example, see Figures 4 to 7. The controller 40 may control the second transmission subassembly 22 to remain in a disconnected state.

[0107] Optionally, see Figures 2-7. It can be seen that the first transmission subassembly 21 can include a first pressurizing control valve 1a and a second pressurizing control valve 1b. The first pressurizing control valve 1a is individually connected to the first cavity 131 and the first wheel cylinder control valve 3a, and the second pressurizing control valve 1b is individually connected to the first cavity 131 and the second wheel cylinder control valve 3b.

[0108] In response to this, in operations 1.1 to 1.4, the controller 40 may control both the first pressurization control valve 1a and the second pressurization control valve 1b to be on. Alternatively, as shown in FIG. 5, in operation 1.2, in order to reduce the number of control valves that need to be switched between the on state and the off state, and thereby reduce the power consumption of the controller 40, the controller 40 may control only the first pressurization control valve 1a to be on and the second pressurization control valve 1b to be kept in the off state. See FIG. 6 and FIG. 7. In operations 1.3 and 1.4, the controller 40 may control only the second pressurization control valve 1b to be on and the first pressurization control valve 1a to be kept in the off state.

[0109] It will be appreciated that in the process of venting the brake control assembly 30, brake fluid cannot enter the brake assembly 02 because the fourth transmission subassembly 24 is disconnected. Thus, the fifth transmission subassembly 25 may be connected or disconnected, which is not limited in this embodiment of the present application. For example, the fifth transmission subassembly 25 may remain connected.

[0110] It is further understood that the exhaust command obtained by the controller 40 for the brake control assembly 30 may further indicate a specific exhaust method for the two cavities of the master cylinder 32. That is, the controller 40 executes one of operations 1.1 to 1.4 based on the exhaust command. For example, when the exhaust command commands the two cavities of the master cylinder 32 to be simultaneously exhausted, the controller 40 may execute operation 1.1. When the exhaust command commands the front cavity 321 of the master cylinder 32 to be individually exhausted, the controller 40 may execute operation 1.3. When the exhaust command commands the front cavity 321 and the rear cavity 322 of the master cylinder 32 to be individually exhausted in sequence, the controller 40 may execute operation 1.3 and operation 1.4 in sequence, or may execute operation 1.3 and operation 1.2 in sequence.

[0111] In another optional implementation of this embodiment of the present application, when the exhaust command is an exhaust command for the brake assembly 02, the controller 40 may be configured to control the motor 11 to move the piston 12 in the pressure cylinder 13 in the second direction y, to control the first transmission subassembly 21 and the fourth transmission subassembly 24 to be connected, and to control the third transmission subassembly 23 and the fifth transmission subassembly 25 to be disconnected.

[0112] In this case, the brake fluid in the first cavity 131 can flow into the brake assembly 02 through the first transmission subassembly 21 and the fourth transmission subassembly 24. In addition, since the fifth transmission subassembly 25 is separated, the brake fluid that has flowed into the brake assembly 02 cannot flow back into the reservoir 01, but can only be discharged through the exhaust port of the brake assembly 02, thereby realizing exhaust for the brake assembly 02. In addition, since the third transmission subassembly 23 is separated in the process of venting the brake assembly 02, the brake fluid can be prevented from being diverted by the third transmission subassembly 23. This ensures that the brake fluid that has flowed into the brake assembly 02 through the fourth transmission subassembly 24 can effectively exhaust the gas in the brake assembly 02.

[0113] It should be appreciated that the exhaust port of the brake assembly 02 must be further opened before venting the brake assembly 02. For example, an exhaust bolt may be disposed in the exhaust port, and an operator may loosen the exhaust bolt to open the exhaust port.

[0114] It should also be understood that in the process of venting the brake assembly 02, brake fluid cannot enter the master cylinder 32 because the third transmission subassembly 23 is disconnected. Thus, the sixth transmission subassembly 26 may be connected or disconnected, which is not limited in this embodiment of the present application. See, for example, FIG. 8. The sixth transmission subassembly 26 may remain connected.

[0115] Optionally, refer to Figures 2 to 8. The brake assembly 02 includes a plurality of brake wheel cylinders, the fourth transmission subassembly 24 may include a plurality of fluid inlet valves connected to the plurality of brake wheel cylinders in a one-to-one correspondence, and the fifth transmission subassembly 25 may include a plurality of fluid outlet valves connected to the plurality of brake wheel cylinders in a one-to-one correspondence. For example, Figures 2 to 8 show four brake wheel cylinders, i.e., brake wheel cylinders 021 to 024, fluid inlet valves 4a to 4d connected to the four brake wheel cylinders in a one-to-one correspondence, and fluid outlet valves 5a to 5d connected to the four brake wheel cylinders in a one-to-one correspondence.

[0116] The controller 40 may be configured to control the motor 11 to move the piston 12 in the pressurizing cylinder 13 in the second direction y, to turn on the fluid inlet valve connected to at least one brake wheel cylinder, and to turn off the fluid outlet valve connected to the brake wheel cylinder. That is, when the controller 40 controls the fluid inlet valve connected to the brake wheel cylinder to turn on, the controller 40 can synchronously control the fluid outlet valve connected to the brake wheel cylinder to turn off. It may be seen that in the hydraulic control system provided in this embodiment of the present application, the controller 40 can implement exhaust for some or all of the brake wheel cylinders by controlling some or all of the fluid inlet valves to turn on.

[0117] For example, see Fig. 8. The controller 40 can control all four fluid inlet valves included in the fourth transmission subassembly 24 to be on, and control all four fluid outlet valves included in the fifth transmission subassembly 25 to be off. In this way, exhaust to the four brake wheel cylinders included in the brake assembly 02 can be performed simultaneously.

[0118] It should be understood that for other fluid outflow valves than the fluid outflow valve connected to at least one brake wheel cylinder, the controller 40 may control the other fluid outflow valves to be on or control the other fluid outflow valves to be off. This is not limited in this embodiment of the present application. Also, in the process of venting the brake assembly 02, the controller 40 may control the second transmission subassembly 22 to be connected or control the second transmission subassembly 22 to be disconnected. For example, see FIG. 8. The second transmission subassembly 22 may remain in a disconnected state.

[0119] Optionally, the exhaust command obtained by the controller 40 may be an exhaust command for at least one target brake wheel cylinder in the brake assembly 02. In response, the controller 40 may be configured to control the motor 11 to move the piston 12 in the pressurizing cylinder 13 in the second direction y, to control at least one target fluid inlet valve of the plurality of fluid inlet valves to ON, and to control other fluid inlet valves of the plurality of fluid inlet valves other than the at least one target fluid inlet valve to OFF. The at least one target fluid inlet valve is a fluid inlet valve connected to the at least one target brake wheel cylinder.

[0120] That is, the controller 40 may vent only the target brake wheel cylinders in the brake assembly that have venting requirements based on the instruction of the venting command, and not vent the other brake wheel cylinders that do not have venting requirements. For example, when the brake wheel cylinders of only one wheel are to be maintained during vehicle maintenance, the solution provided in this embodiment of the present application can be used to vent only the brake wheel cylinders. This not only achieves accurate and efficient venting, but also reduces the waste of brake fluid.

[0121] Please refer to FIG. 8. The brake assembly 02 includes four brake wheel cylinders: a front left (FL) brake wheel cylinder 021, a rear right (R) brake wheel cylinder 022, and a rear left (R) brake wheel cylinder 023. Assume that the brake cylinders are a left (RR) brake wheel cylinder 022, a rear left (RL) brake wheel cylinder 023, and a front right (FR) brake wheel cylinder 024. By controlling different fluid inlet valves to be on, the controller 40 can implement 15 exhaust modes from mode 2.1 to mode 2.15 shown in Table 1. That is, the controller 40 may exhaust the air from the brake assembly 02 using any of modes 2.1 to 2.15 in accordance with the instruction of the exhaust command. [Table 1]

[0122] For example, see Table 1. In mode 2.1, the controller 40 controls the fluid inlet valve 4d of the fourth transmission subassembly 24 to be on and controls the other fluid inlet valves to be off, thereby enabling exhaust to be performed for the FL brake wheel cylinder 021. It should be understood that in this mode 2.1, the controller 40 must control the fluid outlet valve 5d to be off, and the other fluid outlet valves may remain in the on state.

[0123] In mode 2.5, the controller 40 controls the fluid inlet valves 4d and 4c of the fourth transmission subassembly 24 to be on, and controls the fluid inlet valves 4b and 4a to be off, thereby enabling exhaust to the FL brake wheel cylinder 021 and the RR brake wheel cylinder 022. It should be understood that in this mode 2.5, the controller 40 must control the fluid outlet valves 5d and 5c to be off, and the other fluid outlet valves may remain in the on state.

[0124] In mode 2.11, the controller 40 controls the fluid inlet valves 4d, 4c, and 4b of the fourth transmission subassembly 24 to be on and controls the fluid inlet valve 4a to be off, thereby enabling exhaust to be performed for the FL brake wheel cylinder 021, the RR brake wheel cylinder 022, and the RL brake wheel cylinder 023. It should be understood that in this mode 2.11, the controller 40 must control the fluid outlet valves 5d, 5c, and 5d to be off, and the fluid outlet valve 5a may remain in the on state.

[0125] Optionally, the plurality of brake wheel cylinders in the brake assembly 02 may include at least one first brake wheel cylinder and at least one second brake wheel cylinder. The first brake wheel cylinder is individually connected to a first fluid inlet valve of the plurality of fluid inlet valves included in the fourth transmission subassembly 24 and a first fluid outlet valve of the plurality of fluid outlet valves included in the fifth transmission subassembly 25. The second brake wheel cylinder is individually connected to a second fluid inlet valve of the plurality of fluid inlet valves included in the fourth transmission subassembly 24 and a second fluid outlet valve of the plurality of fluid outlet valves included in the fifth transmission subassembly 25.

[0126] Similarly, as shown in Figures 2 to 8, the second transmission subassembly 22 may include a first suction control valve 2a and a second suction control valve 2b. The first suction control valve 2a, the first pressurization control valve 1a of the first transmission subassembly 21, and the first wheel cylinder control valve 3a of the third transmission subassembly 23 may all be connected to the first suction control valve. The second suction control valve 2b, the second pressurization control valve 1b of the first transmission subassembly 21, and the second wheel cylinder control valve 3b of the third transmission subassembly 23 may all be connected to the second suction control valve.

[0127] For example, see Figs. 2-8. The brake assembly 02 may include two first brake wheel cylinders, i.e., a first brake wheel cylinder 023 and a first brake wheel cylinder 024, and two second brake wheel cylinders, i.e., a second brake wheel cylinder 021 and a second brake wheel cylinder 022. The first brake wheel cylinder 024 is individually connected to a first liquid inflow valve 4a and a first liquid outflow valve 5a. The first brake wheel cylinder 023 is individually connected to a first liquid inflow valve 4b and a first liquid outflow valve 5b. The second brake wheel cylinder 022 is individually connected to a second liquid inflow valve 4c and a first liquid outflow valve 5c. The second brake wheel cylinder 021 is individually connected to a second liquid inflow valve 4d and a second liquid outflow valve 5d.

[0128] The first pressurizing control valve 1a, the first liquid suction control valve 2a, and the first wheel cylinder control valve 3a are connected to the first liquid inflow valve 4a and the first liquid inflow valve 4b, respectively. The second pressurizing control valve 1b, the second liquid suction control valve 2b, and the second wheel cylinder control valve 3b are connected to the second liquid inflow valve 4c and the second liquid inflow valve 4d, respectively.

[0129] Please refer to FIG. 8. It can be seen that the first wheel cylinder control valve 3a can establish a hydraulic circuit between the master cylinder 32 and the first brake wheel cylinder, and the second wheel cylinder control valve 3b can establish another hydraulic circuit between the master cylinder 32 and the second brake wheel cylinder. The use of two independent hydraulic circuits can ensure the safety and reliability of controlling the brake assembly 02. Similarly, two pressurizing control valves can be arranged in the system provided in this embodiment of the present application. The two pressurizing control valves are respectively connected to the first liquid inlet valve and the second liquid inlet valve, thereby realizing the independent control of different hydraulic circuits.

[0130] Based on the above-described system configuration, in the step of controlling the motor 11 to move the piston 12 in the pressurizing cylinder 13 in the first direction x (i.e., the liquid suction step), the controller 40 can execute one of the following operations.

[0131] Operation 3.1: The second suction control valve 2b, the second liquid inlet valve, and the second liquid outlet valve are controlled to be on, and the first suction control valve 2a, the first liquid inlet valve, and the first liquid outlet valve are controlled to be off.

[0132] Using Fig. 3 as an example, the controller 40 can control the second liquid inflow valves 4c, 4d and the second liquid outflow valves 5c, 5d to be ON, and control the first liquid inflow valves 4a, 4b and the first liquid outflow valves 5a, 5d to be OFF. At this time, referring to the thick black line in Fig. 3, a hydraulic circuit is formed between the reservoir 01, the second cavity 132 of the pressurizing cylinder 13, and the second wheel brake cylinders 021, 022, and the brake fluid can be sucked into the first cavity 131.

[0133] Operation 3.2: The first suction control valve 2a, the first liquid inlet valve, and the first liquid outlet valve are controlled to be on, and the second suction control valve 2b, the second liquid inlet valve, and the second liquid outlet valve are controlled to be off.

[0134] Please refer to Figure 9. The controller 40 can control the first liquid inflow valves 4a, 4b and the first liquid outflow valves 5a, 5d to be ON, and control the second liquid inflow valves 4c, 4d and the second liquid outflow valves 5c, 5d to be OFF. At this time, referring to the thick black line in Figure 9, a hydraulic circuit is formed between the reservoir 01, the second cavity 132 of the pressurizing cylinder 13, and the first brake wheel cylinders 023, 024, and the brake fluid can be sucked into the first cavity 131.

[0135] Operation 3.3: The first liquid suction control valve 2a, the first liquid inflow valve, the first liquid outflow valve, the second liquid suction control valve 2b, the second liquid inflow valve, and the second liquid outflow valve are controlled to be on.

[0136] Please refer to Figure 10. The controller 40 can control the first liquid inflow valves 4a, 4b, the second liquid inflow valves 4c, 4d, the first liquid outflow valves 5a, 5d, and the second liquid outflow valves 5c, 5d to be ON. At this time, referring to the thick black line in Figure 10, a hydraulic circuit is formed between the reservoir 01, the second cavity 132 of the pressurizing cylinder 13, and the four brake wheel cylinders 021 to 024, and the brake fluid can be sucked into the first cavity 131.

[0137] The controller 40 may perform any one of the above-mentioned operations in the liquid suction step, or may perform a plurality of operations in sequence, for example, may perform operations 3.1 and 3.2 in sequence. The controller 40 can control the liquid suction of the pressurizing assembly 10 by using at least one of the operations 3.1 to 3.3, thereby effectively improving the flexibility of the liquid suction control of the pressurizing assembly.

[0138] As described above, in the liquid suction process, the controller 40 controls the third transmission subassembly 23 to be disconnected, so that the brake fluid output from the second transmission subassembly 22 cannot flow into the brake control assembly 30. Therefore, in the liquid suction process, the sixth transmission subassembly 2 may be connected or disconnected. For example, see Figures 3, 9, and 10. The sixth transmission subassembly 26 may remain in a connected state.

[0139] Optionally, see Figures 2-10. The system may further include a pedal feel simulator 50. The brake fluid transmission assembly 20 may further include a simulator control valve 27. The simulator control valve 27 is connected to the pedal feel simulator 50, the front cavity 321 of the master cylinder, and the third transmission subassembly 23, respectively. The simulator control valve 27 may also be referred to as a pedal simulator valve (PSV).

[0140] Similarly, in this embodiment of the present application, the vent command may alternatively be an vent command to the pedal feel simulator 50. The controller 40 may be further configured to control the pressurizing assembly 10 and the brake fluid transmission assembly 20 to vent the pedal feel simulator 50. The vent process may include a simulator fluid addition sub-process and a simulator vent sub-process.

[0141] The simulator liquid addition sub-process is as follows: control the motor 11 to move the piston 12 in the pressurized cylinder 13 in the second direction y, control the first transmission subassembly 21, the third transmission subassembly 23, and the simulator control valve 27 to connect, and control the fourth transmission subassembly 24 and the sixth transmission subassembly 26 to disconnect.

[0142] In this case, please refer to the thick black line in Fig. 11. A fluid infusion pipeline is connected between the first cavity 131 of the pressurizing cylinder 13 and the pedal feel simulator 50, so that the brake fluid in the first cavity 131 can flow into the pedal feel simulator 50.

[0143] The exhaust sub-process of the simulator is as follows: when the piston 12 moves to the upper limit of the stroke in the second direction y, the third transmission sub-assembly 23 is controlled to be disconnected and the sixth transmission sub-assembly 26 is controlled to be connected.

[0144] The controller 40 controls the motor 11 to move the piston 12 in the second direction y to the upper limit of the stroke, so that the brake fluid can fill the pedal feel simulator 50 reliably. Then, as shown by the thick black line in FIG. 12, after the controller 40 controls the third transmission subassembly 23 to be disconnected and the sixth transmission subassembly 26 to be connected, the spring in the pedal feel simulator 50 can be compressed by the elastic force of the spring. Since the third transmission subassembly 23 is disconnected, the brake fluid flows through the simulator control valve 27 into the front cavity 321 of the master cylinder 32, and then through the sixth transmission subassembly 26 into the reservoir 01. In this way, the exhaust for the pedal feel simulator 50 can be performed.

[0145] It will be appreciated that in the process of venting the pedal feel simulator 50, the second transmission subassembly 22 may remain in a connected state or in a disconnected state. Also, since the fourth transmission subassembly 24 is disconnected and brake fluid cannot enter the brake assembly 02, the fifth transmission subassembly 25 may remain in a connected state or in a disconnected state. In an embodiment of the present invention, the connected state of the second transmission subassembly 22 and the connected state of the fifth transmission subassembly 25 are not limited.

[0146] Optionally, see FIG. 12. The simulator control valve 27 may be connected to the first wheel cylinder control valve 3a of the third transmission subassembly 23. Accordingly, in the step of adding fluid to the pedal feel simulator 50, the controller 40 may control only the first pressurizing control valve 1a of the first transmission subassembly 21 and the first wheel cylinder control valve 3a of the third transmission subassembly 23 to be ON, while both the second pressurizing control valve 1b of the first transmission subassembly 21 and the second wheel cylinder control valve 3b of the third transmission subassembly 23 remain in the OFF state. In this way, the number of valves that need to be switched between the ON state and the OFF state can be reduced as much as possible, thereby reducing the power consumption of the controller 40.

[0147] It will be further appreciated that the vent command obtained by the controller 40 may alternatively be a vent command for the system (i.e., not a vent command for a specific component). In this case, the controller 40 may control the pressurizing assembly 10 and the brake fluid transmission assembly 20 based on the vent command to sequentially vent the brake control assembly 30, the brake assembly 02, and the pedal feel simulator 50. Furthermore, the vent sequence of the above-mentioned assemblies is not limited in this embodiment of the present invention.

[0148] Optionally, as shown in Figures 2 to 12, the system may further include a first pressure sensor 60. The first pressure sensor 60 is connected to the infusion pipeline between the first transmission subassembly 21 and the fourth transmission subassembly 24. For example, the first pressure sensor 60 may be connected to the infusion pipeline between the second pressurization control valve 1b and the second inlet valves 4c, 4d.

[0149] After controlling the pressurizing assembly 10 to output brake fluid to the brake fluid transmission assembly 20 and controlling the brake fluid transmission assembly 20 to connect the pressurizing cylinder 13 to the brake control assembly 30 or the brake assembly 02, the controller 40 can further detect the effect of the exhaust. In an optional embodiment, the detection process is as follows.

[0150] First, the controller 40 controls the first transmission subassembly 21 and the fourth transmission subassembly 24 to be connected, controls the third transmission subassembly 23 and the fifth transmission subassembly 25 to be disconnected, and controls the pressurizing assembly 10 to output the first target volume of brake fluid to the first transmission subassembly. At this time, as shown by the thick black line in FIG. 13, the infusion pipeline between the first cavity 131 of the pressurizing cylinder 13 and the fourth transmission subassembly 24 is conducted. The first target volume of brake fluid in the first cavity 131 can flow into the brake wheel cylinder of the brake assembly 02.

[0151] The controller 40 may then obtain the pressure value collected by the first pressure sensor 60. If the controller 40 detects that the pressure value is not within a first pressure range corresponding to the first target volume, the controller 40 may output a first prompt indicating that the venting of gas has failed. If the controller 40 detects that the pressure value is within the first pressure range corresponding to the first target volume, the controller 40 may output a second prompt indicating that the venting of gas has been successful.

[0152] The first target volume may be a fixed value preset in the controller 40. The first pressure range is a theoretical pressure range that the pressure in the infusion pipeline between the first cavity 131 and the fourth transmission subassembly 24 should reach when the first cavity 131 of the pressurizing cylinder 13 discharges the first target volume of brake fluid on the premise that the discharge standard is met. That is, the controller 40 can compare the pressure value actually collected by the first pressure sensor 60 with the theoretical value to determine whether the discharge operation meets the discharge standard.

[0153] Optionally, after controlling the pressurizing assembly 10 to output the first target volume of brake fluid to the first transmission subassembly 21, the controller 40 can further first continuously monitor the pressure value collected by the first pressure sensor 60 within the first target period. If the controller 40 detects that the fluctuation amplitude of the pressure value collected by the first pressure sensor 60 within the first target period is less than the first amplitude threshold, the controller 40 can determine that the infusion pipeline has good airtightness. It can also continuously detect whether the pressure value collected by the first pressure sensor 60 belongs to a first pressure range. Both the first target period and the first amplitude threshold may be fixed values ​​preset in the controller 40.

[0154] When the controller 40 detects that the brake fluid output by the pressurizing assembly 10 to the first transmission subassembly 21 reaches a first target volume and the fluctuation amplitude of the pressure value collected by the first pressure sensor 60 within the first target period is equal to or greater than a first amplitude threshold, the controller 40 can output a third prompt indicating low tightness. For example, the third prompt may indicate that the tightness of the infusion pipeline between the first cavity 131 and the fourth transmission subassembly 24 is low. Furthermore, the operator can detect and repair the infusion pipeline in a timely manner based on the third prompt.

[0155] In addition, since the exhaust effect cannot be guaranteed if the infusion pipeline is not airtight, the controller 40 may no longer need to continue detecting whether the pressure value collected by the first pressure sensor 60 is within the first pressure range.

[0156] Optionally, as shown in Figures 2-13, the system may further include a second pressure sensor 70. The second pressure sensor 70 is connected to the infusion pipeline between the third transmission subassembly 23 and the front cavity 321 of the master cylinder 32. For example, the second pressure sensor 70 may be connected to the first wheel cylinder control valve 3a in the third transmission subassembly 23. In another optional embodiment, the step of detecting the effect of exhaust by the controller 40 may be as follows:

[0157] First, the controller 40 controls the first transmission subassembly 21 and the first wheel cylinder control valve 3a of the third transmission subassembly 23 to be connected, controls the second wheel cylinder control valve 3b of the third transmission subassembly 23, the fourth transmission subassembly 24, and the sixth transmission subassembly 26 to be disconnected, and controls the pressurizing assembly 10 to output the second target volume of brake fluid to the first transmission subassembly 21. At this time, please refer to the black thick line in FIG. 14. The infusion pipeline between the first cavity 131 of the pressurizing cylinder 13 and the front cavity 321 of the master cylinder 32 is conducted. The second target volume of brake fluid in the first cavity 131 can flow into the front cavity 321 of the master cylinder 32. However, the sixth transmission subassembly 26 prevents the brake fluid from flowing back into the reservoir 01.

[0158] The controller 40 may then obtain the pressure value collected by the second pressure sensor 70. If the controller 40 detects that the pressure value collected by the second pressure sensor 70 is not within a second pressure range corresponding to the second target volume, the controller 40 outputs a first prompt indicating that the exhaust of the gas has failed. If the controller 40 detects that the pressure value collected by the second pressure sensor 70 is within the second pressure range corresponding to the second target volume, the controller 40 outputs a second prompt indicating that the exhaust of the gas has been successful.

[0159] The second target volume is a fixed value preset in the controller 40, and the second target volume may be the same as or different from the first target volume. The second pressure range is a theoretical pressure range that the pressure in the infusion pipeline between the first cavity 131 and the front cavity 321 of the master cylinder 32 should reach when the first cavity 131 of the pressurizing cylinder 13 discharges the second target volume of brake fluid, assuming that the exhaust standard is met. That is, the controller 40 may compare the pressure value actually collected by the second pressure sensor 70 with the theoretical value to determine whether the exhaust operation meets the exhaust standard.

[0160] Optionally, after controlling the pressurizing assembly 10 to output the second target volume of brake fluid to the first transmission subassembly 21, the controller 40 can further first continuously monitor the pressure value collected by the second pressure sensor 70 within the second target period. When the controller 40 detects that the fluctuation amplitude of the pressure value collected by the second pressure sensor 70 within the second target period is less than the second amplitude threshold, the controller 40 can determine that the infusion pipeline has good airtightness. Also, the controller 40 may continuously detect whether the pressure value collected by the second pressure sensor 70 belongs to the second pressure range. Both the second target period and the second amplitude threshold may be fixed values ​​preset in the controller 40. Furthermore, the second target period may be the same as or different from the first target period, and the second amplitude threshold may be the same as or different from the first amplitude threshold.

[0161] When the controller 40 detects that the brake fluid output by the pressurizing assembly 10 to the first transmission subassembly 21 reaches the second target volume and the fluctuation amplitude of the pressure value collected by the second pressure sensor 70 within the second target period is equal to or greater than the second amplitude threshold, the controller 40 can output a third prompt indicating low tightness. For example, the third prompt may indicate that the tightness of the infusion pipeline between the first cavity 131 and the front cavity 321 of the master cylinder 32 is low. Because the exhaust effect cannot be guaranteed if the infusion pipeline is low, the controller 40 may no longer need to continue to detect whether the pressure value collected by the second pressure sensor 70 is within the second pressure range.

[0162] It should be appreciated that the process of detecting the effect of the exhaust requires ensuring that the exhaust port of the brake assembly 02 is in an off state. For example, an operator may tighten an exhaust bolt on the exhaust port to seal the exhaust port.

[0163] In the hydraulic control system provided in this embodiment of the present application, the pressurizing assembly 10 is implemented using a motor 11, a piston 12, and a pressurizing cylinder 13, so that precise control of the discharge amount of brake fluid can be realized. Furthermore, the pressure value collected by the pressure sensor can be used to accurately detect the effect of exhausting, so as to avoid the dangerous working state caused by the exhausting operation not meeting the exhausting standard.

[0164] It is understood that the hydraulic control system provided in this embodiment of the present application can include both the first pressure sensor 60 and the second pressure sensor 70. Thus, the controller 40 can detect the effect of exhaust using any one of the above-mentioned embodiments, or can detect the effect of exhaust using the above-mentioned two embodiments individually, which effectively improves the accuracy and flexibility of detecting the effect of exhaust. Since the first pressure sensor 60 is located in the brake circuit, the first pressure sensor 60 can also be called a brake circuit pressure sensor (BCPS). Since the second pressure sensor 70 is connected to the master cylinder 32, the second pressure sensor 70 can also be called a master cylinder pressure sensor (MCPS). Furthermore, both of the two pressure sensors can be integral pressure sensors (IPTs).

[0165] It is further understood that the pressure value collected by the pressure sensor can accurately reflect the stiffness of the infusion pipeline, and the stiffness when gas exists in the infusion pipeline is significantly different from the stiffness when gas does not exist in the infusion pipeline. Therefore, the controller 40 can accurately determine whether the exhaust operation meets the exhaust standard based on the pressure value collected by the pressure sensor.

[0166] It will be further appreciated that after the controller 40 outputs the second prompt, the operator can determine whether venting needs to be re-started based on the second prompt. If venting needs to be re-started, the operator can re-trigger the vent command. Alternatively, the operator can perform a fault detection of the hydraulic brake system based on the second prompt.

[0167] In this embodiment of the present application, reference is made to Figs. 2-14. The pressurizing assembly 10 may further include a motor position sensor (MPS) 16. The motor position sensor 16 may be individually connected to the controller 40 and the motor 11, and the motor position sensor 16 may be configured to detect the rotational position of the motor 11. Similarly, the controller 40 may determine the travel stroke of the piston 12 based on the rotational position of the motor 11 detected by the motor position sensor 16, and may further determine the amount of brake fluid discharged from the pressurizing cylinder 13 to the first transmission subassembly 21. For example, the controller 40 may determine the amount of brake fluid discharged from the pressurizing cylinder 13 by multiplying the cross-sectional area of ​​the pressurizing cylinder 13 by the stroke of the piston 12 moving in the second direction y. The cross-sectional area is the area of ​​a cross section of the pressurizing cylinder 13 perpendicular to the second direction y.

[0168] Optionally, in this embodiment of the present application, the controller 40 can further be connected to a prompter. The controller 40 can output the first prompt, the second prompt, or the third prompt to the prompter, and the prompter can play the received prompts. For example, the prompter can be an in-vehicle display, and the first prompt, the second prompt, and the third prompt can be text prompts or image prompts. Alternatively, the prompter can be a speaker, and the first prompt, the second prompt, and the third prompt can be verbal prompts. Alternatively, the prompter can be a light-emitting device (e.g., a light-emitting diode), and the first prompt, the second prompt, and the third prompt can all be light prompts. Alternatively, the prompter can be a combination of at least two types of devices: an in-vehicle display, a speaker, and a light-emitting device.

[0169] Optionally, as shown in Fig. 1, the system further includes a fluid infusion pipeline for delivering brake fluid. The controller 40 may be configured to control the pressurizing assembly 10 to perform a depressurizing operation when the pressure value of the fluid infusion pipeline is greater than a pressure threshold value during the step of the pressurizing assembly 10 outputting brake fluid to the brake fluid transmission assembly 20 (i.e., performing a venting operation).

[0170] For example, see Figures 2 to 14. In the process of performing an exhaust operation, the controller 40 can obtain a pressure value collected by the first pressure sensor 60 and obtain a pressure value collected by the second pressure sensor 70. When the controller 40 determines that the pressure value collected by any pressure sensor is greater than a pressure threshold, the controller 40 can control the pressurizing assembly 10 to perform a depressurizing operation.

[0171] The decompression operation may include the following: the motor 11 moves the piston 12 in a first direction x. That is, the controller 40 controls the piston 12 to retract, thereby reducing the pressure value of the infusion pipeline.

[0172] The controller 40 monitors the pressure value of the infusion pipeline during the exhaust process, and when the pressure value is excessively high, controls the pressurizing assembly 10 to perform the decompression operation in a timely manner. Therefore, the dangerous working state of the sudden pressure change caused by factors such as pipeline blockage can be effectively avoided, and the safety of the exhaust process can be ensured.

[0173] Optionally, the controller 40 may be further configured to control the pressurizing assembly 10 and the brake fluid transmission assembly 20 based on the exhaust command to repeat the exhaust operation a target number of times, the target number being greater than 1, and the exhaust operation includes the pressurizing assembly 10 outputting brake fluid to the brake fluid transmission assembly 20, and the brake fluid transmission assembly 20 connecting the pressurizing cylinder 13 to the brake control assembly 30 or the brake assembly 02.

[0174] The target number is a fixed value preset in the controller 40, and the target number is an integer greater than 1. For example, the target number may be 4 or 5. The controller 40 controls the pressurizing assembly 10 and the brake fluid transmission assembly 20 to repeat the exhaust operation multiple times, thereby effectively ensuring the exhaust effect. Each exhaust operation may also be called one pressure building operation.

[0175] Optionally, the controller 40 may be configured to control the pressurizing assembly 10 to output brake fluid to the brake fluid transmission assembly 20 at a first rate when performing the nth exhaust operation, and to output brake fluid to the brake fluid transmission assembly 20 at a second rate when performing the (n+1)th exhaust operation, where n is a positive integer less than the target number, and the second rate is greater than the first rate.

[0176] Since the pressure in the inlet pipeline of the hydraulic brake system tends to stabilize as the number of exhaust operations increases, the controller 40 can control the pressurizing assembly 10 to gradually increase the speed at which the brake fluid is output.

[0177] For example, n may be equal to 1. Furthermore, when the target number is greater than n+1 (i.e., greater than 2), the controller 40 can control the pressurizing assembly 10 to output brake fluid to the brake fluid transmission assembly 20 at a second speed when the (n+2)th exhaust operation is performed up to the target number. That is, the controller 40 can control the pressurizing assembly 10 to output brake fluid at a low speed when the first exhaust operation is performed to ensure safety during the first exhaust. Then, the controller 40 can control the pressurizing assembly 10 to output brake fluid at a high speed to ensure exhaust efficiency.

[0178] Optionally, as shown in FIG. 2-FIG. 14, the system may further include a fluid level sensor 80 located in the reservoir 01 and connected to the controller 40. The fluid level sensor 80 is also called a reservoir level sensor (PLS). The controller 40 may be further configured to obtain the fluid level of the reservoir collected by the fluid level sensor 80, and output a fourth prompt when the fluid level of the reservoir is below a fluid level threshold. The fourth prompt may be used to prompt the operator to timely refill the reservoir 01 with brake fluid to ensure that the subsequent exhaust operation can be performed normally.

[0179] It should be understood that the fourth prompt output method may be the same as the first prompt output method to the third prompt output method, and in this embodiment of the present application, details will not be described again.

[0180] 2-14, it can be seen that the reservoir 01 can include a first liquid storage cavity 011, a second liquid storage cavity 012, and a third liquid storage cavity 013 arranged at a distance from each other. Both the pressurizing cylinder 12 and the fifth transmission subassembly 25 of the pressurizing assembly 10 can be connected to the first liquid storage cavity 011. The rear cavity 322 of the master cylinder 32 of the brake control assembly 30 can be connected to the second liquid storage cavity 012. The sixth transmission subassembly 26 can be connected to the third liquid storage cavity 013.

[0181] The level sensor 80 is located in the first liquid storage cavity 011 and configured to detect the liquid level in the first liquid storage cavity 011 to ensure reliable performance of the pumping operation. Alternatively, the system may include multiple level sensors 80, with one level sensor 80 located in each liquid storage cavity of the reservoir 01.

[0182] By dividing the reservoir 01 into multiple different liquid storage cavities and connecting different components to different liquid storage cavities, after a failure (e.g., leakage) of the infusion pipeline connected to any liquid storage cavity, the influence on other liquid storage cavities can be avoided to ensure that the components connected to the other liquid storage cavities continue to function properly. Also, when gas exists in the infusion pipeline connected to any liquid storage cavity, the gas in the infusion pipeline can be temporarily present in the liquid storage cavity connected to the infusion pipeline, thereby reducing the influence on other liquid storage cavities. Also, when impurities are deposited in any liquid storage cavity, the brake fluid in the other liquid storage cavities can be avoided from being contaminated. Based on the above analysis, it can be seen that the reservoir 01 divides into multiple different liquid storage cavities to realize the isolation of the failure, and the reliability of the hydraulic brake system is effectively improved.

[0183] Optionally, see Figures 2 to 14. The brake control assembly 30 further includes a pedal travel sensor (PTS) 33 connected to the brake pedal 31. The pedal travel sensor 33 is configured to detect a displacement of the brake pedal 31.

[0184] The sixth transmission subassembly 26 may include a master cylinder test valve 6a and a check valve 6b in parallel with the master cylinder test valve 6a. The master cylinder test valve may also be called a test simulate valve (TPS). The master cylinder test valve 6a is connected to a controller 40, and the controller 40 may control the on / off state between the reservoir 01 and the front cavity 321 of the master cylinder 32 by controlling the on / off state of the master cylinder test valve 6a. The check valve 6b may allow the brake fluid in the reservoir 01 to flow into the front cavity 321 of the master cylinder 32, and prevent the brake fluid in the front cavity 321 from flowing back into the reservoir 01. In the event that the master cylinder test valve 6a fails, the reservoir 01 may ensure that the master cylinder 32 can be further replenished with liquid through the check valve 6b to avoid affecting the brake performance.

[0185] Please refer to Figures 2 to 14. The fourth transmission subassembly 24 may further include a plurality of check valves corresponding one-to-one to the plurality of fluid inflow valves, and each check valve is connected in parallel to a corresponding fluid inflow valve. Each check valve can allow the brake fluid to flow out of the brake wheel cylinder and prevent the brake fluid from flowing into the brake wheel cylinder. By installing the check valve in parallel with the fluid inflow valve, even if the fluid inflow valve fails, the brake fluid in the brake wheel cylinder can also flow out of the brake wheel cylinder, which can ensure that the normal running of the vehicle is not affected.

[0186] In the hydraulic brake system provided in this embodiment of the present application, the valves included in the first transmission subassembly 21, the second transmission subassembly 22, and the fifth transmission subassembly 25, and the simulator control valve 27 may all be normally closed valves (NCs). The valves included in the third transmission subassembly 23, the fourth transmission subassembly 24, and the sixth transmission subassembly 26 may all be normally open valves (NOs).

[0187] It is further understood that the hydraulic brake system provided in this embodiment of the present application is an electro-hydraulic brake system, i.e. a control-by-wire brake system, which can recognize the braking intent or braking command by the controller to control the rotation of the motor 11, and convert the rotational motion of the motor 11 into the linear motion of the piston 12, thereby realizing brake assist and active braking. Moreover, the hydraulic brake system provided in this embodiment of the present application can further realize pedal force modulation.

[0188] In conclusion, this embodiment of the present application provides a hydraulic brake system. A pressurizing assembly in the system can output brake fluid to a brake fluid transmission assembly under the control of a controller. The brake fluid transmission assembly can connect the pressurizing assembly to a brake control assembly or a brake assembly under the control of a controller, and perform exhaust of the brake control assembly or the brake assembly. The controller can be applied to the wire-controlled brake system of future vehicles (e.g., intelligent driving vehicles) because the controller can control the pressurizing assembly and the brake fluid transmission assembly to automatically perform the exhaust operation, and there is no need to manually press the brake pedal for the exhaust process. In addition, the pressurizing assembly is realized using a motor, a piston, and a pressurizing cylinder, so that fine adjustment of the discharge amount of brake fluid can be realized.

[0189] In addition, the hydraulic brake system provided in this embodiment of the present application further has the following technical effects.

[0190] Firstly, the automatic venting operation can eliminate accidental errors and malfunctions that may occur in the manual venting operation, ensure the consistency of the venting effect at all times, and improve braking efficiency and safety.

[0191] Secondly, the relevant parameters of the exhaust process (e.g., target times, pressure range, and pressure threshold) can be flexibly set and appropriately applied to various kinds of integrated wire-controlled brake systems with good compatibility.

[0192] Third, the controller can adjust the speed at which the pressurizing assembly discharges brake fluid, thereby achieving a combination of fast and slow discharge, thereby improving the discharge efficiency while ensuring the discharge effectiveness and safety.

[0193] Fourth, the pressure of the infusion pipeline can be detected in real time during the exhaust (discharge) process to avoid the dangerous working state of high pressure caused by malfunction.

[0194] Fifth, flexible exhaust for different components according to different types of exhaust instructions can save exhaust time and improve exhaust efficiency. Also, according to the requirements of application scenarios, only a part of the cavity of the master cylinder or only a part of the brake wheel cylinder is exhausted. Therefore, accurate and efficient exhaust can be realized, and the waste of brake fluid can be effectively reduced.

[0195] Sixth, the ability to detect the effects of exhaust after the exhaust operation is completed allows the operator to determine whether re-evacuation or fault detection is required, thus avoiding unsafe working conditions caused by the effects of exhaust not being detected after the exhaust operation.

[0196] The embodiment of the present application further provides an exhaust control method for a hydraulic brake system, which can be applied to the controller 40 of the hydraulic brake system provided in the above embodiment, see Figure 15A and Figure 15B. The method includes the following steps:

[0197] Step 101: Get an exhaust command.

[0198] In this embodiment of the present application, the controller may obtain an exhaust command in a number of different ways. For example, the controller may obtain an exhaust command when it detects a touch operation on a specific touch button. The specific touch button may be a virtual button on an in-vehicle control panel or a physical button on the vehicle. Alternatively, the controller 40 may further connect to an external vehicle diagnostic device, and the controller 40 may receive an exhaust command transmitted by the vehicle diagnostic device. Alternatively, the controller 40 may further obtain an exhaust command when it detects a specific combined operation (e.g., pressing the brake pedal multiple times at a specific interval) performed on the brake control assembly 30.

[0199] Step 102: Based on the exhaust command, control the motor to move the piston in the pressurized cylinder in a first direction to draw brake fluid from the reservoir into the pressurized cylinder.

[0200] The controller can control the motor to rotate in response to an exhaust command, and the rotation of the motor can be converted into linear motion of the piston, thereby drawing brake fluid from the reservoir into the pressurized cylinder.

[0201] Step 103: Control the pressurizing assembly to output brake fluid to the brake fluid transmission assembly, and control the brake fluid transmission assembly to connect the pressurizing cylinder to the brake control assembly or the brake assembly, and vent the gas in the assembly connected to the pressurizing cylinder.

[0202] For example, the controller may control the motor to move a piston in the pressurized cylinder in a second direction to output brake fluid in the pressurized cylinder to the brake fluid transmission assembly, the first direction being opposite to the second direction.

[0203] Optionally, the second end of the piston may divide the pressurizing cylinder into a first cavity and a second cavity, both of which are connected to the reservoir. The brake control assembly includes a brake pedal and a master cylinder connected to the brake pedal. The brake fluid transmission assembly includes a first transmission subassembly, a second transmission subassembly, a third transmission subassembly, a fourth transmission subassembly, and a fifth transmission subassembly. The first transmission subassembly is individually connected to the first cavity, the third transmission subassembly, and the fourth transmission subassembly, the second transmission subassembly is individually connected to the second cavity, the third transmission subassembly, and the fourth transmission subassembly, the third transmission subassembly is further individually connected to the fourth transmission subassembly and the master cylinder, the fourth transmission subassembly is further connected to the brake assembly, and the fifth transmission subassembly is further connected to the reservoir and the brake assembly.

[0204] Optionally, see Figure 16. Step 102 may include the following steps.

[0205] Step 1021: Based on an exhaust command, control a motor to move a piston in a first direction in the pressurized cylinder, control the motor to connect the second transmission subassembly, the fourth transmission subassembly, and the fifth transmission subassembly, and control the motor to disconnect the first transmission subassembly.

[0206] Optionally, the plurality of brake wheel cylinders in the brake assembly includes at least one first brake wheel cylinder and at least one second brake wheel cylinder. The first brake wheel cylinder is individually connected to a first liquid inlet valve of the plurality of liquid inlet valves included in the fourth transmission subassembly and a first liquid outlet valve of the plurality of liquid outlet valves included in the fifth transmission subassembly. The second brake wheel cylinder is individually connected to a second liquid inlet valve of the plurality of liquid inlet valves included in the fourth transmission subassembly and a second liquid outlet valve of the plurality of liquid outlet valves included in the fifth transmission subassembly. The second transmission subassembly includes a first liquid intake control valve and a second liquid intake control valve. The first liquid intake control valve is individually connected to the second cavity and the first liquid inlet valve, and the second liquid intake control valve is individually connected to the second cavity and the second liquid inlet valve.

[0207] In step 1021, the process of controlling to connect the second transmission subassembly, the fourth transmission subassembly, and the fifth transmission subassembly may be implemented using at least one of the following operations.

[0208] Operation 3.1: The second liquid suction control valve, the second liquid inlet valve, and the second liquid outlet valve are controlled to be on, and the first liquid suction control valve, the first liquid inlet valve, and the first liquid outlet valve are controlled to be off.

[0209] Operation 3.2: The first liquid suction control valve, the first liquid inlet valve, and the first liquid outlet valve are controlled to be on, and the second liquid suction control valve, the second liquid inlet valve, and the second liquid outlet valve are controlled to be off.

[0210] Operation 3.3: The first liquid suction control valve, the first liquid inflow valve, the first liquid outflow valve, the second liquid suction control valve, the second liquid inflow valve, and the second liquid outflow valve are controlled to be on.

[0211] Optionally, in step 103, the process of the controller controlling the brake fluid transmission assembly to connect the pressurizing assembly to the brake control assembly or the brake assembly includes: The method can include controlling the motor to move the piston in the pressurized cylinder in a second direction, controlling the motor to disengage the second transmission subassembly, controlling the motor to connect the first transmission subassembly, controlling the motor to connect the third transmission subassembly or the fourth transmission subassembly.

[0212] With continued reference to Figure 16, step 103 may include the following steps.

[0213] Step 1031a: If the exhaust command is an exhaust command to the brake control assembly, control the motor to move a piston in the pressurized cylinder in a second direction to connect the first transmission subassembly and the third transmission subassembly, and control the fourth transmission subassembly to disconnect.

[0214] Optionally, the brake control assembly further includes a sixth transmission subassembly. The master cylinder includes a front cavity and a rear cavity, the front cavity being closer to the brake pedal than the rear cavity, the front cavity being connected to the reservoir using the sixth transmission subassembly, and the rear cavity being connected to the reservoir. The third transmission subassembly includes a first wheel cylinder control valve and a second wheel cylinder control valve, the first wheel cylinder control valve being individually connected to the front cavity, the first transmission subassembly, and the fourth transmission subassembly, and the second wheel cylinder control valve being individually connected to the rear cavity, the first transmission subassembly, and the fourth transmission subassembly.

[0215] Thus, step 1031a may be implemented using at least one of the following operations:

[0216] Operation 1.1: Control the first transmission subassembly, the first wheel cylinder control valve, the second wheel cylinder control valve, and the sixth transmission subassembly to be connected, and control the fourth transmission subassembly to be disconnected.

[0217] Operation 1.2: Control the first transmission sub-assembly and the second wheel cylinder control valve to be connected, and control the first wheel cylinder control valve and the fourth transmission sub-assembly to be disconnected.

[0218] Operation 1.3: Control the first transmission subassembly, the first wheel cylinder control valve, and the sixth transmission subassembly to be connected, and control the second wheel cylinder control valve and the fourth transmission subassembly to be disconnected.

[0219] Operation 1.4: Control the first transmission subassembly and the first wheel cylinder control valve to be connected, and control the second wheel cylinder control valve, the fourth transmission subassembly, and the sixth transmission subassembly to be disconnected.

[0220] Optionally, in this embodiment of the present application, the vent command to the brake control assembly may be a vent command to a target cavity of the master cylinder. In response, the controller can vent the target cavity of the master cylinder based on the vent command. For example, if the target cavity is the front cavity of the master cylinder, the controller can perform operation 1.3 to vent the front cavity of the master cylinder separately. If the target cavity is the rear cavity of the master cylinder, the controller can perform operation 1.2 or 1.4 to vent the rear cavity of the master cylinder separately. If the target cavity includes the front and rear cavities of the master cylinder, the controller can perform operation 1.1 to vent the front and rear cavities of the master cylinder simultaneously.

[0221] Step 1031b: If the exhaust command is an exhaust command for the brake assembly, control the motor to move the piston in the pressurized cylinder in a second direction to connect the first transmission subassembly and the fourth transmission subassembly, and control the third transmission subassembly and the fifth transmission subassembly to disconnect.

[0222] Optionally, the brake assembly includes a plurality of brake wheel cylinders, the fourth transmission subassembly includes a plurality of fluid inlet valves connected in one-to-one correspondence to the plurality of brake wheel cylinders, and the fifth transmission subassembly includes a plurality of fluid outlet valves connected in one-to-one correspondence to the plurality of brake wheel cylinders.

[0223] Similarly, in step 1031b, the controller can control a fluid inlet valve connected to at least one brake wheel cylinder to be on and a fluid outlet valve connected to the brake wheel cylinder to be off.

[0224] Optionally, the exhaust command may be an exhaust command for at least one target brake wheel cylinder in the brake assembly. Similarly, in step 1031b, the process of the controller controlling on at least one fluid inlet valve of the plurality of fluid inlet valves may include: The step includes controlling at least one target fluid inlet valve of the plurality of fluid inlet valves to be on, the at least one target fluid inlet valve being a fluid inlet valve connected to at least one target brake wheel cylinder.

[0225] Additionally, step 1031b may further include controlling the liquid inlet valves other than the at least one target liquid inlet valve to be off.

[0226] As shown in FIGS. 2-14, it can be seen that brake assembly 02 can include four brake wheel cylinders, and step 1031b can be performed using at least one of the 15 exhaust modes shown in Table 1.

[0227] Optionally, the hydraulic brake system provided in this embodiment of the present application may further include a pedal feel simulator. The brake fluid transmission assembly further includes a simulator control valve. The simulator control valve is connected to the pedal feel simulator, the front cavity of the master cylinder, and the third transmission subassembly, respectively. Accordingly, as shown in FIG. 16, in step 103, the controller may further perform the following operations in the process of moving the piston in the pressurizing cylinder in a second direction by the motor.

[0228] Step 1031c: If the exhaust command is an exhaust command for the pedal feel simulator, control the motor to move the piston in the pressurized cylinder in a second direction, control the first transmission subassembly, the third transmission subassembly, and the simulator control valve to be connected, and control the fourth transmission subassembly and the sixth transmission subassembly to be disconnected.

[0229] Step 1032c: When the piston moves to an upper limit of the stroke in the second direction, control the third transmission subassembly to be disconnected and control the sixth transmission subassembly to be connected.

[0230] Continuing to refer to Figures 15A and 15B, after step 103, the method may further include the following steps:

[0231] Step 104: It is detected whether the number of times the exhaust operation has been performed reaches a target number.

[0232] Each exhaust operation includes the pressurizing assembly outputting brake fluid to the brake fluid transmission assembly, and the brake fluid transmission assembly connecting the pressurizing cylinder to the brake control assembly or the brake assembly. In this embodiment of the present application, after controlling the pressurizing assembly and the brake fluid transmission assembly to perform one exhaust operation, the controller can detect whether the number of times the exhaust operation is performed reaches a target number, and the target number is greater than 1. If the number of times the exhaust operation is performed does not reach the target number, the controller can continue to perform step 102 and step 103. In other words, in this embodiment of the present application, the controller can control the pressurizing assembly and the brake fluid transmission assembly to repeatedly perform the exhaust operation a target number of times each time the controller obtains an exhaust command.

[0233] Optionally, in step 103, the controller may further control the pressurizing assembly to output brake fluid to the brake fluid transmission assembly at a first rate when performing the nth venting operation, and control the pressurizing assembly to output brake fluid to the brake fluid transmission assembly at a second rate when performing the (n+1)th venting operation, where n is a positive integer less than the target number and the second rate is greater than the first rate. For example, n may be equal to 1.

[0234] In the above-mentioned step 104, if the controller detects that the number of times the exhaust operation has been performed reaches the target number, the controller may continue to detect the effectiveness of the exhaust. The process of detecting the effectiveness of the exhaust may be performed by the following steps 105a and 106a, and / or 105b and 106b.

[0235] Optionally, the system may further include a first pressure sensor. The first pressure sensor is connected to the infusion pipeline between the first transmission subassembly and the fourth transmission subassembly. In an optional embodiment, the process of detecting the effect of the exhaust may include the following steps:

[0236] Step 105a: Controlling the first transmission subassembly and the fourth transmission subassembly to be connected, controlling the third transmission subassembly and the fifth transmission subassembly to be disconnected, and controlling the pressurizing assembly to output a first target volume of brake fluid to the first transmission subassembly.

[0237] Step 106a: Detect whether the fluctuation amplitude of the pressure value collected by the first pressure sensor within a first target period is less than a first amplitude threshold.

[0238] If the fluctuation amplitude of the pressure value within the first target period is equal to or greater than the first amplitude threshold, step 107a is executed. If the fluctuation amplitude of the pressure value within the first target period is less than the first amplitude threshold, step 108a is executed.

[0239] Step 107a: Output a third prompt indicating low airtightness.

[0240] When the fluctuation amplitude of the pressure value within the first target period is equal to or greater than the first amplitude threshold, the controller can determine that the airtightness of the infusion pipeline is low and output a third prompt.

[0241] Step 108a: Detect whether a pressure value collected by a first pressure sensor is within a first pressure range corresponding to a first target volume.

[0242] Step 109a is executed if the pressure value collected by the first pressure sensor is not within a first pressure range corresponding to the first target volume, and step 110a is executed if the pressure value collected by the first pressure sensor is within a first pressure range corresponding to the first target volume.

[0243] Step 109a: A first prompt is output indicating that the exhaust of gas has failed.

[0244] If the controller detects that the pressure value collected by the first pressure sensor is not within a first pressure range corresponding to the first target volume, the controller can determine that the exhaust of gas has failed and output a first prompt.

[0245] Step 110a: Output a second prompt indicating successful evacuation of gas.

[0246] If the controller detects that the pressure value collected by the first pressure sensor is within a first pressure range corresponding to the first target volume, the controller can determine that the exhaust of the gas was successful and output a second prompt.

[0247] Optionally, the system further includes a second pressure sensor. The second pressure sensor is connected to the infusion pipeline between the third transmission subassembly and the front cavity of the master cylinder. In another optional embodiment, the process of detecting the effect of exhaust can include the following steps.

[0248] Step 105b: Controlling the first transmission subassembly and the first wheel cylinder control valve of the third transmission subassembly to be connected, controlling the fourth transmission subassembly and the sixth transmission subassembly to be disconnected, and controlling the pressurizing assembly to output a second target volume of brake fluid to the first transmission subassembly.

[0249] Step 106b: Detect whether the fluctuation amplitude of the pressure value collected by the second pressure sensor within the second target period is less than a second amplitude threshold.

[0250] If the fluctuation amplitude of the pressure value within the second target period is equal to or greater than the second amplitude threshold, step 107b is executed. If the fluctuation amplitude of the pressure value within the second target period is less than the second amplitude threshold, step 108b is executed.

[0251] Step 107b: Output a third prompt indicating low airtightness.

[0252] When the fluctuation amplitude of the pressure value within the second target period is equal to or greater than the second amplitude threshold, the controller can determine that the airtightness of the infusion pipeline is low and output a third prompt.

[0253] Step 108b: Detect whether the pressure value collected by the second pressure sensor is within a second pressure range corresponding to a second target volume.

[0254] Step 109b is executed if the pressure value collected by the second pressure sensor is not within a second pressure range corresponding to the second target volume, and step 110b is executed if the pressure value collected by the second pressure sensor is within a second pressure range corresponding to the second target volume.

[0255] Step 109b: Output a first prompt indicating that the gas exhaust has failed.

[0256] If the controller detects that the pressure value collected by the second pressure sensor is not within a second pressure range corresponding to the second target volume, the controller can determine that the exhaust of the gas has failed and output a first prompt.

[0257] Step 110b: Output a second prompt indicating successful evacuation of gas.

[0258] If the controller detects that the pressure value collected by the second pressure sensor is within a second pressure range corresponding to the second target volume, the controller can determine that the exhaust of the gas was successful and output a second prompt.

[0259] Optionally, see Figure 17. The exhaust control method provided in this embodiment of the present application may further include the following steps.

[0260] Step 111: In the process of the pressurizing assembly outputting the brake fluid to the brake fluid transmission assembly, if it detects that the pressure value of the fluid infusion pipeline is greater than the pressure threshold, control the pressurizing assembly to perform a depressurizing operation.

[0261] Optionally, the system further includes a level sensor located in the reservoir and connected to the controller. With continued reference to Figure 17, the method further includes the steps of:

[0262] Step 112: Obtain the reservoir level collected by the level sensor.

[0263] Step 113: If the reservoir level is below the level threshold, output a fourth prompt.

[0264] A fourth prompt may be used to prompt the operator to refill the reservoir with brake fluid in a timely manner.

[0265] It is understood that step 111 and step 112 may be performed synchronously with step 103. Furthermore, it is understood that the order of steps of the exhaust control method provided in the embodiment of the present application may be appropriately adjusted, or steps may be added or deleted according to circumstances. For example, step 104 may be deleted according to circumstances, that is, the controller may control the pressurizing assembly and the brake fluid transmission assembly to perform one exhaust operation. Alternatively, step 105a to step 109a and / or step 105b to step 109b may be deleted according to circumstances. That is, the controller may detect the effect of exhaust in only one way, or may not detect the effect of exhaust. Alternatively, step 111 to step 113 may be deleted according to circumstances. Alternatively, step 112 and step 113 may be performed before step 111. Alternatively, the controller may sequentially perform step 1031a, step 1031b, and step 1031c after step 1021 (the execution order is not limited). That is, the controller does not need to determine the type of exhaust command, but can sequentially exhaust each component.

[0266] Those skilled in the art can clearly understand that for the purpose of convenient and concise description, the specific operation process of the above exhaust control method can be referred to the relevant description in the above system embodiment, and the details will not be described again here.

[0267] In conclusion, the embodiment of the present application provides an exhaust control method. The controller can control the pressurizing assembly and the brake fluid transmission assembly of the hydraulic brake system to automatically perform the exhaust operation, and there is no need to manually press the brake pedal during the exhaust process, so that the controller can be applied to the wire-controlled brake system of future vehicles (e.g., intelligent driving vehicles). In addition, the pressurizing assembly is realized using a motor, a piston, and a pressurizing cylinder, so that the discharge amount of the brake fluid can be finely adjusted.

[0268] Moreover, the method provided in this embodiment of the present application can further eliminate accidental errors and incorrect operations in manual exhaust operation, always ensure the consistency of the exhaust effect, and improve braking efficiency and safety.

[0269] In addition, the controller can be more flexible in providing precise venting to different components in the hydraulic brake system based on different types of venting commands, so as to effectively reduce the waste of brake fluid.

[0270] FIG. 18 is a schematic diagram showing the structure of a controller according to an embodiment of the present application. This controller may be applied to the hydraulic brake system provided in the above-mentioned embodiment. Please refer to FIG. 18. The controller may include a processor 2101, a memory 2102, a network interface 2103, and a bus 2104. The bus 2104 is configured to connect the processor 2101, the memory 2102, and the network interface 2103. The communication connection to other devices may be implemented through the network interface 2103 (which may be wired or wireless). The memory 2102 stores a computer program 21021. The computer program 21021 is used to realize various application functions.

[0271] It should be understood that in this embodiment of the present application, the processor 2101 may be a CPU, or the processor 2101 may be other general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), GPUs or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general purpose processor may be a microprocessor, or any conventional processor, etc.

[0272] The memory 2102 may be volatile or non-volatile memory, or may include both volatile and non-volatile memory. Non-volatile memory includes read-only memory (ROM), programmable read-only memory (ROM), and the like. The volatile memory may be a programmable read only memory (ROM, PROM), erasable programmable read only memory (EPROM), electrically erasable programmable read only memory (EEPROM), or flash memory. The volatile memory may be a random access memory (RAM) used as an external cache. By way of example and not limitation, many forms of RAM may be used, including static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchlink dynamic random access memory (SLDRAM), and direct rambus random access memory (DR RAM).

[0273] In addition to a data bus, the bus 2104 may further include a power bus, a control bus, a status signal bus, etc. However, for clarity of explanation, the various buses are marked as the bus 2104 in the figures.

[0274] The processor 2101 is configured to execute a computer program stored in the memory 2102, and the processor 2101 executes the computer program 21021 to realize the functions of the above-mentioned controller, i.e., to implement the exhaust control method provided in the above-mentioned embodiment.

[0275] The embodiments of the present application further provide another controller, which can be applied to the hydraulic control system provided in the above-mentioned embodiments. The controller can include a programmable logic circuit and / or program instructions, and the controller can be configured to perform the steps in the above-mentioned method embodiments.

[0276] It should be understood that the controller in the hydraulic control system provided in this embodiment of the present application may be implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD). The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof. Of course, the functionality of the controller described above may be realized using software. When the functionality of the controller described above is realized using software, the modules in the controller and configured to implement the exhaust control method described above may also be software modules.

[0277] The embodiment of the present application further provides a vehicle. As shown in Figures 1 to 14, the vehicle may include the reservoir 01, the brake assembly 02, and the hydraulic brake system provided in the above-mentioned embodiment.

[0278] Optionally, as shown in Figures 2-14, the reservoir 01 may include a first liquid storage cavity 011, a second liquid storage cavity 012, and a third liquid storage cavity 013 that are spaced apart from each other. The first liquid storage cavity 011 may be individually connected to a pressurizing assembly 10 (e.g., pressurizing cylinder 12) and a fifth transmission subassembly 25 of a hydraulic brake system, the second liquid storage cavity 012 may be connected to a rear cavity 322 of a master cylinder 32 of the hydraulic brake system, and the third liquid storage cavity 013 may be connected to a sixth transmission subassembly 26 of the hydraulic brake system.

[0279] By dividing the reservoir 01 into multiple different liquid storage cavities and connecting different components to different liquid storage cavities, fault isolation can be realized and the reliability of the hydraulic brake system can be effectively improved.

[0280] Optionally, the vehicle may be an electric vehicle. Additionally, the vehicle may be an autonomous vehicle, a remotely operated vehicle, an air vehicle, etc.

[0281] The exhaust control method provided in the above-mentioned embodiment can be implemented in whole or in part using software, hardware, firmware, or any combination thereof. When the exhaust control method provided in the above-mentioned embodiment is implemented using software, all or a part of the exhaust control method provided in the above-mentioned embodiment can be realized in the form of a computer program product. The computer program product includes at least one computer instruction. When the computer program instruction is loaded or executed on a computer, all or a part of the procedures or functions according to the embodiment of the method of the present application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable equipment. The computer instructions may be stored in a computer-readable storage medium or transmitted from a computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, optical fiber, or digital subscriber line (DSL)) or wireless (e.g., infrared, radio, microwave) methods. The computer readable storage medium may be any available medium accessible by a computer, or a data storage device such as a server or data center that integrates at least one set of available media. The medium may be a magnetic medium (e.g., a floppy disk, a hard disk, or a magnetic tape), an optical medium (e.g., a DVD), a semiconductor medium, etc. The semiconductor medium may be a solid state drive (SSD).

[0282] In this application, terms such as "first" and "second" are used to distinguish between the same or similar items having essentially the same effect and function. It should be understood that there is no logical or chronological dependency between "first", "second" and "nth". There are no limitations on the quantity and order of execution. For example, a first cavity can be referred to as a second cavity, and similarly, a second cavity can be referred to as a first cavity, without departing from the scope of the various examples described.

[0283] In this application, the term "at least one" means at least one, and the term "plurality" means two or more. The terms "system" and "network" may be used interchangeably herein. It should be understood that "and / or" as referred to herein indicates that three relationships may exist. For example, A and / or B indicates three cases: only A exists, both A and B exist, and only B exists. The character " / " generally indicates an "or" relationship between related objects.

[0284] It should be understood that all the valves in the system provided in the embodiments of the present application may be solenoid valves. Also, the names of the valves in the embodiments of the present application do not represent the type of solenoid valve, but indicate the function of the valve, and do not limit the type and variety of the solenoid valve. Therefore, the claims should include other types of solenoid valves with different names and similar functions.

[0285] The above description is merely an arbitrary embodiment of the present application, but is not intended to limit the protection scope of the present application. Any modifications or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. 1. A hydraulic brake system, comprising: a pressurizing assembly, a brake fluid transmission assembly, a brake control assembly, and a controller, the pressurizing assembly including a motor, a piston, and a pressurizing cylinder; the motor is individually connected to a first end of the piston and to the controller, and a second end of the piston is located within the pressurizing cylinder, the pressurizing cylinder being individually connected to the brake fluid transmission assembly and to a reservoir; the brake fluid transmission assembly is further connected individually to the brake control assembly, the controller, and the brake assembly; The controller is configured to control the pressurizing assembly to output brake fluid to the brake fluid transmission assembly, and based on an exhaust command, control the brake fluid transmission assembly to alternately connect the pressurizing cylinder to the brake control assembly and the brake assembly to exhaust gas within an assembly connected to the pressurizing cylinder. system.

2. the controller is configured to control the motor to move the piston in a first direction within the pressurizing cylinder to draw the brake fluid from the reservoir into the pressurizing cylinder, or to control the motor to move the piston in a second direction within the pressurizing cylinder to output the brake fluid in the pressurizing cylinder to the brake fluid transmission assembly; The system of claim 1 , wherein the first direction is opposite to the second direction.

3. a second end of the piston dividing the pressurizing cylinder into a first cavity and a second cavity, both of the first cavity and the second cavity being connected to the reservoir; The brake control assembly includes a brake pedal and a master cylinder connected to the brake pedal, and the brake fluid transmission assembly includes a first transmission subassembly, a second transmission subassembly, a third transmission subassembly, a fourth transmission subassembly, and a fifth transmission subassembly; the first transmission subassembly is individually connected to the first cavity, the third transmission subassembly, and the fourth transmission subassembly; the second transmission subassembly is individually connected to the second cavity, the third transmission subassembly, and the fourth transmission subassembly; the third transmission subassembly is further individually connected to the fourth transmission subassembly and the master cylinder; the fourth transmission subassembly is further connected to the brake assembly; and the fifth transmission subassembly is connected to the reservoir and the brake assembly; The controller: controlling the motor to move the piston in the pressurizing cylinder in the first direction to connect the second transmission subassembly, the fourth transmission subassembly, and the fifth transmission subassembly, and to disconnect the first transmission subassembly; or 3. The system of claim 2, configured to control the motor to move the piston in the pressurized cylinder in the second direction to control the motor to connect the first transmission subassembly and to control the motor to connect the third transmission subassembly or the fourth transmission subassembly.

4. 4. The system of claim 3, wherein when the exhaust command is an exhaust command to the brake control assembly, the controller is configured to control the motor to move the piston in the second direction within the pressurizing cylinder to connect the first transmission subassembly and the third transmission subassembly and to control the fourth transmission subassembly to disconnect.

5. the brake control assembly further includes a sixth transmission subassembly, the master cylinder includes a front cavity and a rear cavity, the front cavity being closer to the brake pedal than the rear cavity, the front cavity being connected to the reservoir using the sixth transmission subassembly, and the rear cavity being connected to the reservoir; the third transmission subassembly includes a first wheel cylinder control valve and a second wheel cylinder control valve, the first wheel cylinder control valve being individually connected to the front cavity, the first transmission subassembly, and the fourth transmission subassembly, and the second wheel cylinder control valve being individually connected to the rear cavity, the first transmission subassembly, and the fourth transmission subassembly; the controller controls the motor to move the piston in the second direction within the pressurizing cylinder; and controlling the first transmission subassembly, the first wheel cylinder control valve, the second wheel cylinder control valve, and the sixth transmission subassembly to be connected, and controlling the fourth transmission subassembly to be disconnected; controlling the first transmission subassembly and the second wheel cylinder control valve to be connected, and controlling the first wheel cylinder control valve and the fourth transmission subassembly to be disconnected; controlling the first transmission subassembly, the first wheel cylinder control valve, and the sixth transmission subassembly to be connected, and controlling the second wheel cylinder control valve and the fourth transmission subassembly to be disconnected; and 5. The system of claim 4, configured to perform at least one of the actions of controlling the first transmission subassembly and the first wheel cylinder control valve to be connected, and controlling the second wheel cylinder control valve, the fourth transmission subassembly, and the sixth transmission subassembly to be disconnected.

6. 4. The system of claim 3, wherein the controller is configured to control the motor to move the piston in the second direction within the pressurizing cylinder to connect the first transmission subassembly and the fourth transmission subassembly and to disconnect the third transmission subassembly and the fifth transmission subassembly when the exhaust command is an exhaust command for the brake assembly.

7. the brake assembly includes a plurality of brake wheel cylinders, the fourth transmission subassembly includes a plurality of fluid inlet valves connected to the plurality of brake wheel cylinders in a one-to-one correspondence, and the fifth transmission subassembly includes a plurality of fluid outlet valves connected to the plurality of brake wheel cylinders in a one-to-one correspondence; 7. The system of claim 6, wherein the controller is configured to control the motor to move the piston in the pressurizing cylinder in the second direction, turn on a fluid inlet valve connected to at least one brake wheel cylinder, and control off a fluid outlet valve connected to the brake wheel cylinder.

8. the exhaust command is an exhaust command for at least one target brake wheel cylinder in the brake assembly, and the controller configured to control the motor to move the piston in the second direction within the pressurizing cylinder, to control at least one target liquid inlet valve among the plurality of liquid inlet valves to be on, and to control liquid inlet valves other than the at least one target liquid inlet valve among the plurality of liquid inlet valves to be off; 8. The system of claim 7, wherein the at least one target fluid inlet valve is a fluid inlet valve connected to the at least one target brake wheel cylinder.

9. the plurality of brake wheel cylinders in the brake assembly include at least one first brake wheel cylinder and at least one second brake wheel cylinder; The first brake wheel cylinder is individually connected to a first liquid inflow valve of a plurality of liquid inflow valves included in the fourth transmission subassembly and a first liquid outflow valve of a plurality of liquid outflow valves included in the fifth transmission subassembly, and the second brake wheel cylinder is individually connected to a second liquid inflow valve of the plurality of liquid inflow valves included in the fourth transmission subassembly and a second liquid outflow valve of the plurality of liquid outflow valves included in the fifth transmission subassembly, the second transmission subassembly includes a first liquid intake control valve and a second liquid intake control valve, the first liquid intake control valve being individually connected to the second cavity and the first liquid inlet valve, and the second liquid intake control valve being individually connected to the second cavity and the second liquid inlet valve; the controller controls the motor to move the piston in the first direction within the pressurizing cylinder; and controlling the second liquid suction control valve, the second liquid inflow valve, and the second liquid outflow valve to be on, and controlling the first liquid suction control valve, the first liquid inflow valve, and the first liquid outflow valve to be off; Controlling the first liquid suction control valve, the first liquid inflow valve, and the first liquid outflow valve to on, and controlling the second liquid suction control valve, the second liquid inflow valve, and the second liquid outflow valve to off; and 9. The system of claim 3, configured to perform at least one of the following operations: controlling on the first liquid suction control valve, the first liquid inflow valve, the first liquid outflow valve, the second liquid suction control valve, the second liquid inflow valve, and the second liquid outflow valve.

10. the system further includes a pedal feel simulator, the brake fluid transmission assembly further including a simulator control valve, the simulator control valve being individually connected to the pedal feel simulator, the front cavity of the master cylinder, and the third transmission subassembly; The controller: when the exhaust command is an exhaust command for the pedal feel simulator, controlling the motor to move the piston in the second direction within the pressurized cylinder, controlling the first transmission subassembly, the third transmission subassembly, and the simulator control valve to be connected, and controlling the fourth transmission subassembly and the sixth transmission subassembly to be disconnected; and 10. The system of claim 3, further configured to control the third transmission subassembly to be disengaged and the sixth transmission subassembly to be connected when the piston moves to an upper limit of a stroke in the second direction.

11. The system further includes a first pressure sensor, the first pressure sensor being connected to an infusion pipeline between the first transmission subassembly and the fourth transmission subassembly, and the controller further comprising: controlling the pressurizing assembly to output the brake fluid to the brake fluid transmission assembly, and controlling the brake fluid transmission assembly to connect the pressurizing cylinder to the brake control assembly or the brake assembly, followed by controlling the first transmission subassembly and the fourth transmission subassembly to be connected, controlling the third transmission subassembly and the fifth transmission subassembly to be disconnected, and controlling the pressurizing assembly to output a first target volume of brake fluid to the first transmission subassembly; and outputting a first prompt indicating that exhaust of gas has failed when detecting that the pressure value collected by the first pressure sensor is not within a first pressure range corresponding to the first target volume; or 11. The system of claim 3, further configured to output a second prompt indicating successful evacuation of gas when the pressure value collected by the first pressure sensor is detected to be within a first pressure range corresponding to the first target volume.

12. The controller: detecting whether the pressure value collected by the first pressure sensor is within the first pressure range when the brake fluid output by the pressurizing assembly to the first transmission subassembly reaches the first target volume and the pressure value collected by the first pressure sensor has a fluctuation amplitude within a first target time period less than a first target amplitude threshold; or 12. The system of claim 11, further configured to output a third prompt indicating low tightness when the brake fluid output by the pressurizing assembly to the first transmission subassembly reaches the first target volume and the pressure value collected by the first pressure sensor has a fluctuation amplitude within the first target time period that is equal to or greater than a first amplitude threshold.

13. The system further includes a second pressure sensor, the second pressure sensor being connected to an infusion pipeline between the third transmission subassembly and a front cavity of the master cylinder, and the controller further comprising: controlling the pressurizing assembly to output the brake fluid to the brake fluid transmission assembly, and controlling the brake fluid transmission assembly to connect the pressurizing cylinder to the brake control assembly or the brake assembly, and then controlling the first transmission subassembly to connect a first wheel cylinder control valve of the third transmission subassembly and controlling the fourth transmission subassembly and the sixth transmission subassembly to disconnect, and controlling the pressurizing assembly to output a second target volume of brake fluid to the first transmission subassembly; and outputting a first prompt indicating that the exhaust of gas has failed when detecting that the pressure value collected by the second pressure sensor is not within a second pressure range corresponding to the second target volume; or 11. The system of claim 3, further configured to output a second prompt indicating successful evacuation of gas when the pressure value collected by the second pressure sensor is detected to be within a second pressure range corresponding to the second target volume.

14. The controller: detecting whether the pressure value collected by the second pressure sensor is within the second pressure range when the brake fluid output by the pressurizing assembly to the first transmission subassembly reaches the second target volume and a fluctuation amplitude of the pressure value collected by the second pressure sensor within a second target time period is less than a second amplitude threshold; or 14. The system of claim 13, further configured to output a third prompt indicating low tightness when the brake fluid output by the pressurizing assembly to the first transmission subassembly reaches the second target volume and the pressure value collected by the second pressure sensor has a fluctuation amplitude within a second target period that is equal to or greater than a second amplitude threshold.

15. The system further includes a fluid infusion pipeline for delivering the brake fluid, and the controller is 15. The system of claim 1, further configured to control the pressurization assembly to perform a depressurization operation when a pressure value in the infusion pipeline is detected to be greater than a pressure threshold.

16. 16. The system of claim 1, wherein the controller is configured to control the pressurizing assembly and the brake fluid transmission assembly to repeat the exhaust operation a target number of times based on the exhaust command, the target number being greater than one, and the exhaust operation includes the pressurizing assembly outputting the brake fluid to the brake fluid transmission assembly, and the brake fluid transmission assembly connecting the pressurizing cylinder to the brake control assembly or the brake assembly.

17. the controller is configured to control the pressurizing assembly to output the brake fluid to the brake fluid transmission assembly at a first speed when performing the n-th exhaust operation, and to output the brake fluid to the brake fluid transmission assembly at a second speed when performing the (n+1)-th exhaust operation; 17. The system of claim 16, wherein n is a positive integer less than the target number, and the second rate is greater than the first rate.

18. 18. The system of claim 1, further comprising a fluid level sensor located in the reservoir and connected to the controller, the controller outputting a fourth prompt when the fluid level in the reservoir collected by the fluid level sensor is below a fluid level threshold.

19. 1. A method for exhaust control of a hydraulic brake system, applied to a controller in the hydraulic brake system, the system further comprising a pressurizing assembly, a brake fluid transmission assembly, and a brake control assembly, the pressurizing assembly comprising a motor, a piston, and a pressurizing cylinder, the motor being individually connected to a first end of the piston and to the controller, a second end of the piston being located within the pressurizing cylinder, the pressurizing cylinder being individually connected to the brake fluid transmission assembly and a reservoir, the brake fluid transmission assembly being further individually connected to the brake control assembly, the controller, and a brake assembly, the method comprising: obtaining an exhaust command; controlling the pressurizing assembly to output brake fluid to the brake fluid transmission assembly, and based on the exhaust command, controlling the brake fluid transmission assembly to alternately connect the pressurizing cylinder to the brake control assembly and the brake assembly, and exhausting gas within an assembly connected to the pressurizing cylinder. method.

20. Prior to controlling the pressurizing assembly to output the brake fluid to the brake fluid transmission assembly based on the exhaust command, the method further includes controlling the motor to move the piston in the pressurizing cylinder in a first direction based on the exhaust command to draw the brake fluid from the reservoir into the pressurizing cylinder; The step of controlling the pressurizing assembly to output brake fluid to the brake fluid transmission assembly includes controlling the motor to move the piston in the pressurizing cylinder in a second direction to output the brake fluid in the pressurizing cylinder to the brake fluid transmission assembly; 20. The method of claim 19, wherein the first direction is opposite to the second direction.

21. the second end of the piston divides the pressurizing cylinder into a first cavity and a second cavity, both of the first cavity and the second cavity being connected to the reservoir; the brake control assembly includes a brake pedal and a master cylinder connected to the brake pedal; the brake fluid transmission assembly includes a first transmission subassembly, a second transmission subassembly, a third transmission subassembly, a fourth transmission subassembly, and a fifth transmission subassembly, the first transmission subassembly being individually connected to the first cavity, the third transmission subassembly, and the fourth transmission subassembly, the second transmission subassembly being individually connected to the second cavity, the third transmission subassembly, and the fourth transmission subassembly, the third transmission subassembly being further individually connected to the fourth transmission subassembly and the master cylinder, the fourth transmission subassembly being further individually connected to the brake assembly, and the fifth transmission subassembly being connected to the reservoir and the brake assembly; The step of controlling the motor to move the piston in a first direction within the pressurizing cylinder to draw the brake fluid from the reservoir into the pressurizing cylinder includes: controlling the motor to move the piston in the pressurizing cylinder in the first direction to connect the second transmission subassembly, the fourth transmission subassembly, and the fifth transmission subassembly, and to disconnect the first transmission subassembly; The step of controlling the brake fluid transmission assembly to connect the pressurizing assembly to the brake control assembly or the brake assembly includes:

21. The method of claim 20, comprising controlling the first transmission subassembly to connect and controlling the third transmission subassembly or the fourth transmission subassembly to connect.

22. When the exhaust command is an exhaust command for the brake control assembly, controlling the first transmission subassembly to be connected and controlling the third transmission subassembly or the fourth transmission subassembly to be connected includes:

22. The method of claim 21, comprising controlling the first transmission subassembly and the third transmission subassembly to be connected and controlling the fourth transmission subassembly to be disconnected.

23. the brake control assembly further includes a sixth transmission subassembly, the master cylinder includes a front cavity and a rear cavity, the front cavity being closer to the brake pedal than the rear cavity, the front cavity being connected to the reservoir using the sixth transmission subassembly, the rear cavity being connected to the reservoir, the third transmission subassembly includes a first wheel cylinder control valve and a second wheel cylinder control valve, the first wheel cylinder control valve being individually connected to the front cavity, the first transmission subassembly, and the fourth transmission subassembly, and the second wheel cylinder control valve being individually connected to the rear cavity, the first transmission subassembly, and the fourth transmission subassembly; The step of controlling the first transmission subassembly and the third transmission subassembly to be connected and controlling the fourth transmission subassembly to be disconnected includes: controlling the first transmission subassembly, the first wheel cylinder control valve, the second wheel cylinder control valve, and the sixth transmission subassembly to be connected, and controlling the fourth transmission subassembly to be disconnected; controlling the first transmission subassembly and the second wheel cylinder control valve to be connected, and controlling the first wheel cylinder control valve and the fourth transmission subassembly to be disconnected; controlling the first transmission subassembly, the first wheel cylinder control valve, and the sixth transmission subassembly to be connected, and controlling the second wheel cylinder control valve and the fourth transmission subassembly to be disconnected; and 23. The method of claim 22, comprising at least one of the following steps: controlling the first transmission subassembly and the first wheel cylinder control valve to be connected, and controlling the second wheel cylinder control valve, the fourth transmission subassembly, and the sixth transmission subassembly to be disconnected.

24. When the exhaust command is an exhaust command for the brake assembly, controlling the first transmission subassembly to be connected and controlling the third transmission subassembly or the fourth transmission subassembly to be connected includes:

22. The method of claim 21, comprising controlling the first transmission subassembly and the fourth transmission subassembly to be connected and controlling the third transmission subassembly and the fifth transmission subassembly to be disconnected.

25. the brake assembly includes a plurality of brake wheel cylinders, the fourth transmission subassembly includes a plurality of fluid inlet valves connected to the plurality of brake wheel cylinders in a one-to-one correspondence, and the fifth transmission subassembly includes a plurality of fluid outlet valves connected to the plurality of brake wheel cylinders in a one-to-one correspondence; The step of controlling the first transmission subassembly and the fourth transmission subassembly to be connected and controlling the third transmission subassembly and the fifth transmission subassembly to be disconnected includes:

25. The method of claim 24, comprising controlling a fluid inlet valve connected to at least one brake wheel cylinder to be on and a fluid outlet valve connected to said brake wheel cylinder to be off.

26. the exhaust command is an exhaust command for at least one target brake wheel cylinder in the brake assembly; The step of controlling at least one of the plurality of fluid inlet valves to be on includes the step of controlling at least one target fluid inlet valve of the plurality of fluid inlet valves to be on, the at least one target fluid inlet valve being a fluid inlet valve connected to the at least one target brake wheel cylinder; 26. The method of claim 25, further comprising controlling liquid inlet valves of the plurality of liquid inlet valves other than the at least one target liquid inlet valve to be off.

27. the plurality of brake wheel cylinders in the brake assembly include at least one first brake wheel cylinder and at least one second brake wheel cylinder, the first brake wheel cylinder being individually connected to a first liquid inlet valve of the plurality of fluid inlet valves included in the fourth transmission subassembly and a first liquid outflow valve of the plurality of fluid outflow valves included in the fifth transmission subassembly, the second brake wheel cylinder being individually connected to a second liquid inlet valve of the plurality of fluid inlet valves included in the fourth transmission subassembly and a second liquid outflow valve of the plurality of fluid outflow valves included in the fifth transmission subassembly, the second transmission subassembly including a first liquid suction control valve and a second liquid suction control valve, the first liquid suction control valve being individually connected to the second cavity and the first liquid inlet valve, and the second liquid suction control valve being individually connected to the second cavity and the second liquid inflow valve; The step of controlling to connect the second transmission subassembly, the fourth transmission subassembly, and the fifth transmission subassembly includes: controlling the second liquid suction control valve, the second liquid inflow valve, and the second liquid outflow valve to be on, and controlling the first liquid suction control valve, the first liquid inflow valve, and the first liquid outflow valve to be off; controlling the first liquid suction control valve, the first liquid inflow valve, and the first liquid outflow valve to be on, and controlling the second liquid suction control valve, the second liquid inflow valve, and the second liquid outflow valve to be off; and 27. The method of any one of claims 21 to 26, comprising at least one of the following embodiments: controlling the first liquid intake control valve, the first liquid inlet valve, the first liquid outlet valve, the second liquid intake control valve, the second liquid inlet valve, and the second liquid outlet valve to on.

28. the system further includes a pedal feel simulator, the brake fluid transmission assembly further including a simulator control valve, the simulator control valve being individually connected to the pedal feel simulator, the front cavity of the master cylinder, and the third transmission subassembly; When the exhaust command is an exhaust command to the pedal feel simulator, the method further comprises: controlling the motor to move the piston in the pressurizing cylinder in the second direction, controlling the motor to connect the first transmission subassembly, the third transmission subassembly, and the simulator control valve, and controlling the fourth transmission subassembly and the sixth transmission subassembly to disconnect; 28. The method of claim 21, further comprising: controlling the third transmission subassembly to be disengaged and controlling the sixth transmission subassembly to be engaged when the piston is moved to an upper limit of a stroke in the second direction.

29. The system further includes a first pressure sensor, the first pressure sensor being connected to an infusion pipeline between the first transmission subassembly and the fourth transmission subassembly, and the method further comprising: controlling the pressurizing assembly to output the brake fluid to the brake fluid transmission assembly, and controlling the brake fluid transmission assembly to connect the pressurizing cylinder to the brake control assembly or the brake assembly, followed by controlling the first transmission subassembly and the fourth transmission subassembly to be connected, controlling the third transmission subassembly and the fifth transmission subassembly to be disconnected, and controlling the pressurizing assembly to output a first target volume of brake fluid to the first transmission subassembly; and outputting a first prompt indicating that exhaust of gas has failed when detecting that the pressure value collected by the first pressure sensor is not within a first pressure range corresponding to the first target volume; or 29. The method of any one of claims 21 to 28, further comprising the step of outputting a second prompt indicating successful evacuation of gas when the pressure value collected by the first pressure sensor is detected to be within a first pressure range corresponding to the first target volume.

30. The method comprises: detecting whether the pressure value collected by the first pressure sensor is within the first pressure range when the brake fluid output by the pressurizing assembly to the first transmission subassembly reaches the first target volume and a fluctuation amplitude of the pressure value collected by the first pressure sensor within a first target time period is less than a first amplitude threshold; or 30. The method of claim 29, further comprising: outputting a third prompt indicating poor tightness when the brake fluid output by the pressurizing assembly to the first transmission subassembly reaches the first target volume and a fluctuation amplitude of the pressure value collected by the first pressure sensor within a first target period is equal to or greater than a first amplitude threshold.

31. The system further includes a second pressure sensor, the second pressure sensor being connected to an infusion pipeline between the third transmission subassembly and a front cavity of the master cylinder, the method comprising: controlling the pressurizing assembly to output the brake fluid to the brake fluid transmission assembly, and controlling the brake fluid transmission assembly to connect the pressurizing cylinder to the brake control assembly or the brake assembly, and then controlling the first transmission subassembly to connect a first wheel cylinder control valve of the third transmission subassembly and controlling the fourth transmission subassembly and the sixth transmission subassembly to disconnect, and controlling the pressurizing assembly to output a second target volume of brake fluid to the first transmission subassembly; and outputting a first prompt indicating that the evacuation of gas has failed when detecting that the pressure value collected by the second pressure sensor is not within a second pressure range corresponding to the second target volume; or 29. The method of any one of claims 21 to 28, further comprising the step of outputting a second prompt indicating successful evacuation of gas when the pressure value collected by the second pressure sensor is detected to be within a second pressure range corresponding to the second target volume.

32. The method comprises: detecting whether the pressure value collected by the second pressure sensor is within the second pressure range when the brake fluid output by the pressurizing assembly to the first transmission subassembly reaches the second target volume and a fluctuation amplitude of the pressure value collected by the second pressure sensor within a second target time period is less than a second amplitude threshold; or 32. The method of claim 31, further comprising: outputting a third prompt indicating poor tightness when the brake fluid output by the pressurizing assembly to the first transmission subassembly reaches the second target volume and a fluctuation amplitude of the pressure value collected by the second pressure sensor within a second target period is equal to or greater than a second amplitude threshold.

33. 33. The method according to any one of claims 19 to 32, wherein the system further comprises a fluid infusion pipeline for conveying the brake fluid, the method further comprising the step of controlling the pressurizing assembly to perform a depressurizing operation when detecting that a pressure value of the fluid infusion pipeline is greater than a pressure threshold.

34. The step of controlling the pressurizing assembly to output brake fluid to the brake fluid transmission assembly and controlling the brake fluid transmission assembly to connect the pressurizing cylinder to the brake control assembly or the brake assembly based on an exhaust command includes:

34. The method according to any one of claims 19 to 33, comprising controlling the pressurizing assembly and the brake fluid transmission assembly to repeatedly perform an exhaust operation a target number of times based on the exhaust command, the target number being greater than one, and the exhaust operation including the pressurizing assembly outputting the brake fluid to the brake fluid transmission assembly and the brake fluid transmission assembly connecting the pressurizing cylinder to the brake control assembly or the brake assembly.

35. The step of controlling the pressurizing assembly and the brake fluid transmission assembly to repeat the exhaust operation a target number of times includes: When performing the exhaust operation for an nth time, controlling the pressurizing assembly to output the brake fluid to the brake fluid transmission assembly at a first speed; and controlling the pressurizing assembly to output the brake fluid to the brake fluid transmission assembly at a second speed when performing the (n+1)th exhaust operation.

35. The method of claim 34, wherein n is a positive integer less than the target number, and the second rate is greater than the first rate.

36. 36. The method of any one of claims 19 to 35, wherein the system further includes a fluid level sensor located in the reservoir and connected to the controller, the method further including the step of outputting a fourth prompt when the fluid level in the reservoir collected by the fluid level sensor is below a fluid level threshold.

37. 37. A computer readable storage medium having instructions stored thereon that, when executed on a controller, enable the controller to perform the method of any one of claims 19 to 36.

38. A controller applicable to a hydraulic brake system, the hydraulic brake system further comprising a pressurizing assembly, a brake fluid transmission assembly, and a brake control assembly, the pressurizing assembly comprising a motor, a piston, and a pressurizing cylinder, the motor being individually connected to a first end of the piston and the controller, the second end of the piston being located within the pressurizing cylinder, the pressurizing cylinder being individually connected to the brake fluid transmission assembly and a reservoir, the pressurizing cylinder being capable of obtaining brake fluid from the reservoir, the brake fluid transmission assembly being further individually connected to the brake control assembly, the controller, and the brake assembly, 37. A controller comprising programmable logic circuitry and / or program instructions, the controller being configured to carry out a method according to any one of claims 19 to 36.

39. 19. A vehicle including a reservoir, a brake assembly, and a hydraulic brake system according to any one of claims 1 to 18, wherein the reservoir is configured to store brake fluid.

40. 40. The vehicle of claim 39, wherein the reservoir includes a first liquid storage cavity, a second liquid storage cavity, and a third liquid storage cavity spaced apart, the first liquid storage cavity being individually connected to a pressurization assembly and a fifth transmission subassembly of the hydraulic brake system, the second liquid storage cavity being connected to a rear cavity of a master cylinder of the hydraulic brake system, and the third liquid storage cavity being connected to a sixth transmission subassembly of the hydraulic brake system.

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