Brake fluid exhaust method and device of decoupling brake control system, medium and vehicle

Abstract

The invention provides a brake fluid exhaust method and device of a decoupling brake control system, a medium and a vehicle. The decoupling brake system is arranged on a target vehicle and comprises a main brake controller and a redundant brake controller; the main brake control system comprises a main cylinder cavity, a pedal simulator and a pressure buildup module; the method comprises the steps that brake fluid in an oil can is controlled to flow into the front wheel ends on the two sides through a redundant brake controller, and gas of the brake fluid in the redundant brake controller is exhausted; a brake pedal signal is responded, brake fluid in the oil can is controlled to flow into the rear wheel ends on the two sides and the front wheel ends on the two sides through the main cylinder cavity, and gas of the brake fluid in the main cylinder cavity, the rear wheel ends on the two sides and the front wheel ends is exhausted; the brake pedal signal is responded, brake fluid in the oil can is controlled to flow into the pedal simulator, and gas of the brake fluid in the pedal simulator is exhausted; and brake fluid in the oil pot is controlled to flow into the four-wheel end through the pressure building module so as to discharge gas of the brake fluid in the pressure building module. The exhaust quality of the brake fluid of the decoupling brake control system can be improved.

Description

Technical Field

[0001] The present invention relates to the field of brake system exhaust, and in particular to a brake fluid exhaust method, equipment, medium and vehicle for decoupling a brake control system. Background Art

[0002] With the rapid development of vehicle technology, various manufacturers' vehicle braking systems have gradually begun to use brake redundancy systems to meet the needs of automotive intelligence. For brake redundancy systems, vehicle brake fluid is the same as conventional brake systems. Usually, after a period of use, new brake fluid needs to be replaced to ensure the braking effect of the vehicle. At present, the existing exhaust method mainly uses vacuum extraction for the master cylinder (the vacuum processor is inside the master cylinder assembly), but this method is aimed at non-decoupled brake control systems. When the driver steps on the brake pedal, the brake fluid pushed by the master cylinder will directly reach the four-wheel wheel end to generate pressure. However, the decoupled brake control system has a complex structure, including components such as a pedal simulator and a pressure building module. Therefore, when the above-mentioned vacuum exhaust method is applied to the decoupled brake controller, it is easy to cause the gas in the brake fluid to be unable to be completely discharged. Summary of the invention

[0003] The present invention application provides a brake fluid exhaust method, device, medium and vehicle for a decoupled brake control system to solve the technical problem of poor brake fluid exhaust in a brake control system.

[0004] In order to solve the above technical problems, the first aspect of the present invention application provides a brake fluid exhaust method for a decoupled brake control system, wherein the decoupled brake system is arranged on a target vehicle, and the decoupled brake control system includes a main brake controller and a redundant brake controller; the main brake controller and the redundant brake controller are connected; the redundant brake controller is connected to the front wheel ends on both sides of the target vehicle, and the main brake controller is connected to the rear wheel ends on both sides of the target vehicle; the main brake controller and the redundant brake controller are both connected to the oil tank of the target vehicle; the main brake control system includes a master cylinder chamber, a pedal simulator and a pressure building module;

[0005] The brake fluid exhaust method comprises:

[0006] In response to the first exhaust instruction, the brake fluid in the oil pot is controlled to flow into the front wheel ends on both sides through the redundant brake controller to discharge the gas of the brake fluid in the redundant brake controller; in response to the first brake pedal signal, the brake fluid in the oil pot is controlled to flow into the rear wheel ends on both sides and the front wheel ends on both sides through the master cylinder cavity to discharge the gas of the brake fluid in the master cylinder cavity, the rear wheel ends on both sides and the front wheel ends on both sides;

[0007] In response to a second exhaust command and a second brake pedal signal, controlling the brake fluid in the oil tank to flow into the pedal simulator to exhaust the gas of the brake fluid in the pedal simulator;

[0008] In response to the third exhaust instruction, the brake fluid in the oil tank is controlled to flow into the front wheel ends on both sides and the rear wheel ends on both sides through the pressure building module to exhaust the gas of the brake fluid in the pressure building module.

[0009] The present invention is applied to a decoupling brake control system, and the decoupling control system includes a main brake controller and a redundant brake controller, wherein the main brake controller and the redundant brake controller are connected, the redundant brake controller is connected to the front wheel ends on both sides of the target vehicle, the main brake controller is connected to the rear wheel ends on both sides of the target vehicle, and the main brake controller and the redundant brake controller are both connected to the oil pot of the target vehicle. When exhausting, in response to the first exhaust command, the brake fluid in the oil pot is controlled to flow into the front wheel ends on both sides through the redundant brake controller to discharge the brake fluid gas in the redundant brake controller, and then in response to the first brake pedal signal, the brake fluid in the oil pot is controlled to flow into the rear wheel ends on both sides and the front wheel ends on both sides through the main cylinder cavity to discharge the brake fluid gas in the main cylinder cavity, the rear wheel ends on both sides and the front wheel ends on both sides; further, in response to the second exhaust command and the second brake pedal signal, the brake fluid in the oil pot is controlled to flow into the pedal simulator to discharge the brake fluid gas in the pedal simulator; in response to the third exhaust command, the brake fluid in the oil pot is controlled to flow into the front wheel ends on both sides and the rear wheel ends on both sides through the pressure building module to discharge the brake fluid gas in the pressure building module, compared with the existing The technical solution relying on the vacuum booster realizes the sequential exhaust of the master cylinder chamber, pedal simulator and pressure building module of the decoupled brake control system, ensures the integrity and thoroughness of the brake fluid exhaust of the decoupled brake control system with a redundant brake controller, and ensures that the brake fluid gas in the master cylinder chamber, pedal simulator and pressure building module is exhausted as much as possible, thereby solving the problem of poor exhaust in the prior art; in addition, the exhaust method of the present application is suitable for a brake control system with a redundant brake controller, which can work independently when the main brake controller fails, respond to requirements including but not limited to intelligent driving, and generate hydraulic pressure through the redundant brake controller to slow down and stop the target vehicle, thereby playing a redundant brake backup role and effectively improving driving safety.

[0010] A second aspect of the present application provides a brake fluid exhaust device of a decoupled brake control system, the decoupled brake system being provided on a target vehicle, and the decoupled brake control system comprising a main brake controller and a redundant brake controller;

[0011] The main brake controller is connected to the redundant brake controller; the redundant brake controller is connected to the front wheel ends on both sides of the target vehicle, and the main brake controller is connected to the rear wheel ends on both sides of the target vehicle; the main brake controller and the redundant brake controller are both connected to the oil tank of the target vehicle; the main brake control system includes a master cylinder chamber, a pedal simulator and a pressure building module;

[0012] The brake fluid exhaust device comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other through the communication bus;

[0013] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the operation of the brake fluid exhaust method of the decoupled brake control system.

[0014] A third aspect of the present application provides a computer-readable storage medium, which stores at least one executable instruction. When the executable instruction is executed on a brake fluid exhaust device of a decoupled braking control system, the brake fluid exhaust device of the decoupled braking control system performs the operation of the brake fluid exhaust method of the decoupled braking control system.

[0015] A fourth aspect of the present application provides a vehicle, the vehicle being provided with a decoupling brake system and a domain controller, and the decoupling brake control system comprising a primary brake controller and a redundant brake controller;

[0016] The main brake controller is connected to the redundant brake controller; the redundant brake controller is connected to the front wheel ends on both sides of the target vehicle, and the main brake controller is connected to the rear wheel ends on both sides of the target vehicle; the main brake controller and the redundant brake controller are both connected to the oil tank of the target vehicle; the main brake control system includes a master cylinder chamber, a pedal simulator and a pressure building module;

[0017] The domain controller is used to execute the operation of the brake fluid exhaust method of the decoupled brake control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 : A flow chart of a first embodiment of a brake fluid venting method for a decoupled brake control system provided in the present application.

[0019] Figure 2 : A schematic diagram of an exemplary technical architecture of the decoupling braking control system provided in the present invention application.

[0020] Figure 3 : A schematic diagram of the technical architecture of a second embodiment of the brake fluid exhaust method for a decoupled brake control system provided in the present application.

[0021] Figure 4 : Schematic diagram of the exhaust process of the second embodiment of the brake fluid exhaust method of the decoupled brake control system provided in the present application.

[0022] Figure 5 : A flow chart of a second embodiment of a brake fluid exhaust method for a decoupled brake control system provided in the present application.

[0023] Figure 6 : A flow chart of a preferred implementation of the second embodiment of the brake fluid exhaust method for the decoupled brake control system provided in the present application.

[0024] Figure 7 : A schematic structural diagram of a first embodiment of a brake fluid exhaust device for a decoupled brake control system provided in the present application. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] According to relevant technical records, the existing exhaust method mainly uses vacuum extraction on the master cylinder (the vacuum processor is inside the master cylinder assembly), but this method is aimed at a non-decoupled brake control system, which usually does not have a pressure building module and a pedal simulator. When the driver steps on the brake pedal, the brake fluid pushed by the master cylinder will directly reach the four-wheel ends to generate pressure.

[0027] However, the decoupled braking control system has a complex structure, including components such as a pedal simulator and a pressure building module. At this time, when the driver steps on the brake pedal, the brake fluid pushed by the master cylinder will not go directly to the four-wheel end, but will first reach the pedal simulator; the sensor inside the main brake controller recognizes the driver's intention to step on the brake pedal, and through the operation of the motor of the pressure building module, it builds hydraulic pressure for the brake fluid pump at the four-wheel end, thereby decelerating the entire vehicle.

[0028] Therefore, when the above-mentioned vacuum-based exhaust method is applied to a decoupled brake control system, since the decoupled brake control system includes components such as a pedal simulator and a pressure building module, the vacuum method can only exhaust the gas in the master cylinder, while it is difficult to completely exhaust the brake fluid gas in components such as the pedal simulator and the pressure building module.

[0029] Therefore, there is an urgent need on the market for a brake fluid venting method for a decoupled brake control system, which can achieve complete and thorough venting of the decoupled brake control system.

[0030] For one or more of the above technical issues, please refer to Figure 1 , Figure 1 A schematic flow chart of a first embodiment of a brake fluid exhaust method for a decoupled brake control system provided in the present application.

[0031] Wherein, the decoupling brake system is arranged on the target vehicle, and the decoupling brake control system includes an integrated brake control unit (IBCU) and a redundant brake controller (RBU).

[0032] In this embodiment, the redundant brake controller is independent of the main brake controller, and can work independently when the main brake controller fails, respond to intelligent driving needs and generate hydraulic pressure, thereby ensuring that the brake control system still has the ability to decelerate and brake, ensuring the driving safety of the target vehicle.

[0033] For example, Figure 2 As shown, the main brake controller and the redundant brake controller are connected (the connection methods include controller area network bus (Controller Area Network, referred to as CAN) connection and connection through brake fluid pipeline), and both are powered separately; the redundant brake controller is connected to the front wheel ends on both sides of the target vehicle, and the main brake controller is connected to the rear wheel ends on both sides of the target vehicle; the main brake controller and the redundant brake controller are both connected to the oil tank of the target vehicle (refer to Figure 3 )connect.

[0034] In addition, the main brake controller is connected to the wheel speed sensors (WSS) of the rear wheels on both sides through electrical signals, and the redundant brake controller is connected to the wheel speed sensors of the front wheels on both sides through electrical signals. The electronic parking brake system (EPB) is electrically connected to the main brake controller, and the front and rear brake calipers (not shown) are connected to the main brake controller and the redundant brake controller respectively through oil pipes.

[0035] The brake fluid exhaust method described in this embodiment can be applied to a domain controller of a target vehicle, an external device of a target vehicle, or a vehicle-mounted terminal. The brake fluid exhaust method specifically includes steps S101 to S103, which are described in detail as follows:

[0036] Step S101, in response to the first exhaust instruction, controls the brake fluid in the oil pot to flow into the front wheel ends on both sides through the redundant brake controller to discharge the gas of the brake fluid in the redundant brake controller; in response to the first brake pedal signal, controls the brake fluid in the oil pot to flow into the rear wheel ends on both sides and the front wheel ends on both sides through the master cylinder cavity to discharge the gas of the brake fluid in the master cylinder cavity, the rear wheel ends on both sides and the front wheel ends on both sides.

[0037] In this step, the decoupled brake control system can establish secure access with the diagnostic instrument to achieve communication connection or electrical connection, and receive a first exhaust instruction (or diagnostic instruction) from the diagnostic instrument, such as 31 01F201 07. After receiving the instruction, the main brake controller and the redundant brake controller control the switching state of their respective internal valve bodies, so that the brake fluid in the oil tank flows into the front wheel ends on both sides through the redundant brake controller, thereby removing the gas in the redundant brake controller and the front wheel end circuits.

[0038] Furthermore, the operator steps on the brake pedal according to certain rules, and the decoupled brake control system responds to the first brake pedal signal to control the brake fluid in the oil tank to flow into the rear wheel ends on both sides and the front wheel ends on both sides through the master cylinder cavity to expel the gas in the master cylinder cavity, the rear wheel ends on both sides, the front wheel ends on both sides and the conventional pipelines.

[0039] For example, the operator can loosen the exhaust bolt at the left front wheel end, connect a transparent oil pipe with a collection tank to the exhaust bolt, and continue to slowly step on the brake pedal while observing the transparent oil pipe until no bubbles flow out. For example, step on the brake pedal 20 times, about 100 seconds, the braking process should not be too fast, and it is advisable to step on the brake pedal to the bottom in 1 second. The last step is to step on the bottom without loosening, close the exhaust bolt, and after confirming that the exhaust bolt is tightened, loosen the pedal, and then remove the brake fluid collection tank. The specific number of pedal steps depends on the actual vehicle status. If there are still bubbles flowing out at the end, the number of foot steps needs to be increased to ensure that there is no residual gas in the wheel cylinder. Then follow the same operation to operate the right front wheel exhaust bolt, the right rear wheel exhaust bolt, and the left rear wheel exhaust bolt until the exhaust of the four wheel cylinders is completed.

[0040] After exhausting the four wheel cylinders, the operator can use the above-mentioned diagnostic instrument to send an exhaust inspection command, such as 3103F2 01. After receiving the command, the main brake controller and the redundant brake controller can close the internal valve body, and stop the operation of the motor and / or motor pump to avoid brake fluid backflow.

[0041] Step S102, in response to a second exhaust command and a second brake pedal signal, controlling the brake fluid in the oil tank to flow into the pedal simulator to exhaust the gas of the brake fluid in the pedal simulator.

[0042] In this step, the operator can check and confirm that the exhaust bolts of the left front, right front, left rear and right rear wheel cylinders are tightened, the brake fluid in the oil tank is sufficient and the oil tank cover is closed. Then operate the diagnostic instrument, decouple the brake control system to receive and respond to the second exhaust instruction of the diagnostic instrument, such as 31 01F2 01 08, the main brake controller can open the valve body related to the pedal simulator inside it, and then respond to the second brake pedal signal to control the brake fluid in the oil tank to flow into the pedal simulator to exhaust the gas of the brake fluid in the pedal simulator.

[0043] Exemplarily, for the above-mentioned second brake pedal signal, the operator can press the brake pedal hard and hold it briefly for about 3 seconds, and then release the brake pedal (continuous and intermittent slow pressing is required, for example, the process of pressing the brake pedal is about 3 seconds, and the process of releasing the brake pedal is about 3 seconds), and the process of pressing and releasing the brake pedal can be more than 20 times.

[0044] Furthermore, the operator can use the diagnostic instrument to send an exhaust check command to the decoupled brake control system, such as 3103F2 01, and the main brake controller will close the valve related to the pedal simulator after receiving the command.

[0045] Step S103, in response to the third exhaust instruction, control the brake fluid in the oil tank to flow into the front wheel ends on both sides and the rear wheel ends on both sides through the pressure building module to exhaust the gas of the brake fluid in the pressure building module.

[0046] In this step, the operator can loosen the left front exhaust bolt, connect the exhaust bolt with a transparent oil pipe with a collection tank, and use the diagnostic instrument to send a third exhaust command to start exhausting. The decoupled brake control system receives and responds to the third exhaust command, controls the brake fluid in the oil pot to flow into the front wheel ends on both sides and the rear wheel ends on both sides through the pressure building module and each valve body, so as to exhaust the gas of the brake fluid in the pressure building module. When no bubbles are observed to flow out of the transparent oil pipe, tighten the exhaust bolt and remove the collection tank.

[0047] Furthermore, the same method as above can be used to operate the right front wheel, right rear wheel and left rear wheel to complete the exhaust of the four wheel ends, and receive an exhaust inspection instruction from the diagnostic instrument, such as 31 03F2 01, to end the exhaust of the pressure building module.

[0048] Compared with the prior art, this embodiment has at least the following beneficial effects:

[0049] The present invention is applied to a decoupling brake control system, and the decoupling control system includes a main brake controller and a redundant brake controller, wherein the main brake controller and the redundant brake controller are connected, the redundant brake controller is connected to the front wheel ends on both sides of the target vehicle, the main brake controller is connected to the rear wheel ends on both sides of the target vehicle, and the main brake controller and the redundant brake controller are both connected to the oil pot of the target vehicle. When exhausting, in response to the first exhaust command, the brake fluid in the oil pot is controlled to flow into the front wheel ends on both sides through the redundant brake controller to discharge the brake fluid gas in the redundant brake controller, and then in response to the first brake pedal signal, the brake fluid in the oil pot is controlled to flow into the rear wheel ends on both sides and the front wheel ends on both sides through the main cylinder cavity to discharge the brake fluid gas in the main cylinder cavity, the rear wheel ends on both sides and the front wheel ends on both sides; further, in response to the second exhaust command and the second brake pedal signal, the brake fluid in the oil pot is controlled to flow into the pedal simulator to discharge the brake fluid gas in the pedal simulator; in response to the third exhaust command, the brake fluid in the oil pot is controlled to flow into the front wheel ends on both sides and the rear wheel ends on both sides through the pressure building module to discharge the brake fluid gas in the pressure building module, compared with the existing The technical solution relying on the vacuum booster realizes the sequential exhaust of the master cylinder chamber, pedal simulator and pressure building module of the decoupled brake control system, ensures the integrity and thoroughness of the brake fluid exhaust of the decoupled brake control system with a redundant brake controller, and ensures that the brake fluid gas in the master cylinder chamber, pedal simulator and pressure building module is exhausted as much as possible, thereby solving the problem of poor exhaust in the prior art; in addition, the exhaust method of the present application is suitable for a brake control system with a redundant brake controller, which can work independently when the main brake controller fails, respond to requirements including but not limited to intelligent driving, and generate hydraulic pressure through the redundant brake controller to slow down and stop the target vehicle, thereby playing a redundant brake backup role and effectively improving driving safety.

[0050] like Figure 3 and 4 As shown, based on the first embodiment, Figure 3 A technical architecture diagram of the second embodiment of the brake fluid exhaust method of the decoupled brake control system of the present invention is provided. In the figure, FL, FR, RR and RL refer to the left front wheel end, the right front wheel end, the right rear wheel end and the left rear wheel end, respectively. ① is a simulator valve, ② is a master cylinder isolation valve, ③ is a main brake controller boost valve (hereinafter referred to as the second boost valve), ④ is a main brake controller inlet valve, ⑤ is a main brake controller return valve, ⑥ is a redundant brake controller inlet valve, ⑦ is a redundant brake controller boost valve (hereinafter referred to as the first boost valve), ⑧ is a redundant brake controller return valve, and ⑨ is a one-way valve.

[0051] In some embodiments, for Figure 3In the architecture shown, before exhaust, the master cylinder isolation valve is normally open, the second boost valve is normally closed, the main brake controller inlet valve is normally open, the main brake controller return valve is normally closed, the first boost valve is normally closed, the redundant brake controller return valve is normally closed, and the redundant brake controller inlet valve is normally open.

[0052] like Figure 4 As shown, the valve group module status mainly includes "00=disabled", "01=enabled for test" and "02=enabled". Among them, "00=disabled" means that the internal valve body, motor, etc. will not have any action, which is generally the factory state of the parts. "01=enabled for test" is generally used when testing or exhausting. At this time, the valve bodies, motors and other components in the system will respond to external commands and perform operations such as opening, closing or running. "02=enabled" represents the normal use of the decoupled brake control system. The system will activate the valve bodies or clicks that need to be used according to actual functional requirements to ensure the braking performance during driving.

[0053] In addition, the redundant brake controller of this embodiment further includes a motor pump, a first boost valve and an accumulator, and the accumulator is connected to the front wheel ends on both sides through the first boost valve.

[0054] Figure 5 A flow chart of a second embodiment of a brake fluid exhaust method for a decoupled brake control system of the present invention is provided.

[0055] The step S101 controls the brake fluid in the oil pot to flow into the front wheel ends on both sides through the redundant brake controller to discharge the brake fluid gas in the master cylinder cavity, the rear wheel ends on both sides and the front wheel ends on both sides, including the step S501: by controlling the operation of the motor pump, the first boost valve is controlled to open, so that the brake fluid in the oil pot passes through the accumulator and the first boost valve in turn, and flows into the front wheel ends on both sides to discharge the brake fluid gas in the master cylinder cavity, the rear wheel ends on both sides and the front wheel ends on both sides.

[0056] Among them, the motor of the above-mentioned redundant brake controller operates at a frequency of 1000 rpm, and acts on the plunger pump push rods on both sides in turn through the eccentric wheel mechanism (not shown in the figure), so that the plunger pump can actively absorb the brake fluid in the oil pot through the accumulator to the front wheel ends on both sides, so that the brake fluid reaches the front wheel end in the order of the oil pot, accumulator, first boost valve, motor pump and front wheel end, fills these circuits, and discharges the gas in these circuits.

[0057] It can be understood that after the exhaust of all four wheel cylinders is completed, the operator can send an exhaust check instruction, such as 31 03F2 01, through the diagnostic instrument. After the system receives the instruction, it can close the two first boost valves and stop the motor pump of the redundant brake controller to prevent the brake fluid from flowing back.

[0058] Furthermore, in some preferred embodiments, the master brake controller also includes a simulator valve, and the master cylinder chamber is connected to the pedal simulator through the simulator valve; controlling the brake fluid in the oil pot to flow into the pedal simulator to discharge the gas of the brake fluid in the pedal simulator includes: controlling the simulator valve to open, and controlling the brake fluid in the oil pot to flow into the pedal simulator along the master cylinder and the simulator valve in sequence to discharge the gas of the brake fluid in the pedal simulator.

[0059] After completing the above operations, the operator can send an exhaust inspection command, such as 31 03F201, through the diagnostic instrument. After receiving the command, the system closes the simulator valve.

[0060] This preferred embodiment mainly discharges the gas in the pedal feel simulator. Since the simulator valve is open, the brake fluid in the pipeline can be slowly pushed into the pedal simulator when the brake pedal is slowly stepped on for multiple times, filling the pedal simulator, and discharging the gas in the pedal simulator, so that the gas inside the pedal simulator flows to the simulator valve and the outer end of the one-way valve; if the simulator valve is not opened, the one-way valve can only flow from the inside of the pedal simulator to the outside, and the gas inside the pedal simulator cannot be discharged. After the gas inside the pedal simulator is discharged, the simulator valve can be closed.

[0061] In other preferred embodiments, the master brake controller also includes a master cylinder isolation valve and a second boost valve, and the front wheel ends on both sides and the rear wheel ends on both sides are connected to the master cylinder cavity through the master cylinder isolation valve; the front wheel ends on both sides and the rear wheel ends on both sides are connected to the pressure building module through the second boost valve.

[0062] The main brake controller also includes a motor, which is used to control the piston in the cavity of the pressure building module; the control of the brake fluid in the oil pot flowing into the front wheel ends on both sides and the rear wheel ends on both sides through the pressure building module to discharge the gas of the brake fluid in the pressure building module includes: controlling the operation of the motor to move the piston to suck the brake fluid in the oil pot into the cavity of the pressure building module, and then flowing into the front wheel ends on both sides and the rear wheel ends on both sides through the pressure building module to discharge the gas of the brake fluid in the pressure building module.

[0063] In this embodiment, after the system receives the instruction, it can control the opening of the second boost valve, the motor of the pressure building module runs at a frequency of 1000 rpm, and the motor of the pressure building module converts the rotation into linear motion through the screw sleeve structure, thereby pushing the piston in the pressure building module cavity to reciprocate back and forth, and the piston can actively suck the brake fluid in the oil pot into the pressure building module cavity, and then from the pressure building module through each valve body to each wheel end, so that the gas in these circuits can be discharged in the order of the oil pot, the pressure building module check valve, the pressure building module cavity, the main brake controller inlet valve to each wheel end. The implementation time of this step can be about 1 minute. When no bubbles are observed to flow out of the transparent oil pipe, tighten the exhaust bolt and remove the collection tank. Among them, when the motor is reversed, that is, when the piston of the pressure building module cavity retreats, the second boost valve is controlled to close to ensure that the pressure building module can suck the brake fluid from the oil pot into the pressure building module cavity; when the motor is forward, that is, when the piston of the pressure building module cavity is pushed forward, the second boost valve is opened, so that the piston pushes the air in the pressure building module cavity to each wheel end for discharge along with the brake fluid.

[0064] At the end of exhaust, the diagnostic instrument sends an exhaust inspection command, such as 31 03F2 01. After receiving the command, the system will close the second boost valve and the motor of the pressure building module will stop rotating and stop at the initial position, ending the exhaust of the pressure building module.

[0065] According to one or more of the above embodiments, after exhausting the master cylinder, the redundant brake controller, the pedal simulator and the pressure building module once or multiple times, further inspection and confirmation can be performed to determine whether the gas inside the system is completely exhausted, for example Figure 6 As shown, the brake fluid exhaust method further includes step S601 and step S602, which are specifically:

[0066] Step S601, in response to the exhaust check instruction, controls the master cylinder isolation valve to be closed, controls the second boost valve to be opened, and controls the first boost valve to be opened, thereby building up pressure on the front wheel ends and the rear wheel ends on both sides by controlling the brake fluid in the oil tank to flow to the front wheel ends and the rear wheel ends on both sides.

[0067] Step S602: acquiring pressure values ​​at the front wheel ends on both sides and the rear wheel ends on both sides, and judging whether the gas of the decoupling brake control system is exhausted based on the pressure values.

[0068] In this embodiment, it is necessary to ensure that there is sufficient brake fluid in the oil tank, the oil tank cover is closed, the exhaust bolts at the four wheel ends are tightened and the brake pedal is not pressed. At this time, the diagnostic instrument initiates an exhaust inspection command, such as 31 01F2 0A, and the system responds to the command. At this time, the master cylinder isolation valve is controlled to be closed, the second boost valve is controlled to be opened, and the first boost valve is controlled to be opened. The remaining valve bodies inside the system remain in their original states, and pressure is actively established at the four wheel ends through the operation of the motor pump, so as to judge whether the gas in the decoupled brake control system is exhausted by the pressure value.

[0069] Finally, a command can be sent through the diagnostic instrument to change the valve group module status of the redundant brake controller to 02 for delivery to the target user.

[0070] Based on the first and second embodiments, the present invention also provides an application example. Figure 4 The example includes seven stages, specifically:

[0071] Phase 1: The system and the diagnostic instrument establish a diagnostic connection through secure access, and the diagnostic instrument changes the valve group module state of the redundant brake controller to 01 by sending a command to test the exhaust state for subsequent exhaust steps. The diagnostic instrument is used to send the first exhaust command, the second exhaust command and the third exhaust command to the main brake controller.

[0072] The second stage involves bleeding the master cylinder and the redundant brake controller.

[0073] The third stage is to exhaust the pedal simulator.

[0074] The fourth stage is to exhaust the pressure building module.

[0075] In the fifth stage, the master cylinder and the redundant brake controller are bled again.

[0076] In the sixth stage, the established pressure value is used to further check and confirm whether the gas inside the system is completely exhausted.

[0077] In the seventh stage, the valve group module status of the redundant brake controller is changed to 02 and delivered to the user in a normal state.

[0078] The above application examples can be used in after-sales scenarios, including exhaust after replacing both the main brake controller and the redundant brake controller, and exhaust after replacing only the main brake controller. If only the redundant brake controller needs to be replaced in some after-sales scenarios, at this time, since the main brake controller remains in the same state as before replacement, that is, the brake fluid has no gas, it is only necessary to exhaust the internal circuit of the redundant brake controller. Therefore, it is only necessary to perform the above-mentioned first, second, sixth and seventh stages to achieve after-sales delivery.

[0079] like Figure 7 As shown, the present invention application also provides a brake fluid exhaust device of a decoupled brake control system, wherein the decoupled brake system is provided in a target vehicle, and the decoupled brake control system includes a main brake controller and a redundant brake controller;

[0080] The main brake controller is connected to the redundant brake controller; the redundant brake controller is connected to the front wheel ends on both sides of the target vehicle, and the main brake controller is connected to the rear wheel ends on both sides of the target vehicle; the main brake controller and the redundant brake controller are both connected to the oil tank of the target vehicle; the main brake control system includes a master cylinder chamber, a pedal simulator and a pressure building module;

[0081] The brake fluid exhaust device comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other through the communication bus;

[0082] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the operation of the brake fluid exhaust method of the decoupled brake control system.

[0083] Figure 7 The schematic diagram of the structure of the embodiment of the brake fluid exhaust device of the present invention is shown. The specific embodiment of the present invention does not limit the specific implementation of the brake fluid exhaust device.

[0084] like Figure 7 As shown, the brake fluid exhaust device may include: a processor (processor) 702 , a communications interface (Communications Interface) 704 , a memory (memory) 706 , and a communication bus 708 .

[0085] The processor 702, the communication interface 704, and the memory 706 communicate with each other via a communication bus 708. The communication interface 704 is used to communicate with other devices such as a client or other server network elements. The processor 702 is used to execute a program 710, which can specifically execute the relevant steps in the above-mentioned embodiment of the brake fluid exhaust method.

[0086] Specifically, the program 710 may include program code including computer executable instructions.

[0087] The processor 702 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiment of the present invention. The one or more processors included in the brake fluid exhaust device may be processors of the same type, such as one or more CPUs; or may be processors of different types, such as one or more CPUs and one or more ASICs.

[0088] The memory 706 is used to store the program 710. The memory 706 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0089] Correspondingly, the present application also provides a computer-readable storage medium, in which at least one executable instruction is stored. When the executable instruction is executed on the brake fluid exhaust device of the decoupled braking control system, the brake fluid exhaust device of the decoupled braking control system performs the operation of the brake fluid exhaust method of the decoupled braking control system.

[0090] The present invention application also provides a vehicle, the vehicle is provided with a decoupling brake system and a domain controller, and the decoupling brake control system includes a main brake controller and a redundant brake controller;

[0091] The main brake controller is connected to the redundant brake controller; the redundant brake controller is connected to the front wheel ends on both sides of the target vehicle, and the main brake controller is connected to the rear wheel ends on both sides of the target vehicle; the main brake controller and the redundant brake controller are both connected to the oil tank of the target vehicle; the main brake control system includes a master cylinder chamber, a pedal simulator and a pressure building module;

[0092] The domain controller is used to execute the operation of the brake fluid exhaust method of the decoupled brake control system.

[0093] The algorithms or displays provided herein are not inherently related to any particular computer, virtual system or other device. In addition, the embodiments of the present invention are not directed to any particular programming language.

[0094] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. Similarly, in order to simplify the present invention and help understand one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, the various features of the embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. Wherein, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself is a separate embodiment of the present invention.

[0095] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and further may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive.

[0096] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising a number of different elements and by means of a suitably programmed computer. In a unit claim enumerating a number of devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be understood as limitations on the order of execution.

[0097] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A brake fluid exhaust method for a decoupled brake control system, characterized in that: The decoupling brake system is provided on the target vehicle, and the decoupling brake control system includes a main brake controller and a redundant brake controller; The main brake controller is connected to the redundant brake controller; the redundant brake controller is connected to the front wheel ends on both sides of the target vehicle, and the main brake controller is connected to the rear wheel ends on both sides of the target vehicle; the main brake controller and the redundant brake controller are both connected to the oil tank of the target vehicle; the main brake control system includes a master cylinder chamber, a pedal simulator and a pressure building module; The brake fluid exhaust method comprises: In response to the first exhaust instruction, the brake fluid in the oil pot is controlled to flow into the front wheel ends on both sides through the redundant brake controller to discharge the gas of the brake fluid in the redundant brake controller; in response to the first brake pedal signal, the brake fluid in the oil pot is controlled to flow into the rear wheel ends on both sides and the front wheel ends on both sides through the master cylinder cavity to discharge the gas of the brake fluid in the master cylinder cavity, the rear wheel ends on both sides and the front wheel ends on both sides; In response to a second exhaust command and a second brake pedal signal, controlling the brake fluid in the oil tank to flow into the pedal simulator to exhaust the gas of the brake fluid in the pedal simulator; In response to the third exhaust instruction, the brake fluid in the oil tank is controlled to flow into the front wheel ends on both sides and the rear wheel ends on both sides through the pressure building module to exhaust the gas of the brake fluid in the pressure building module.

2. A brake fluid exhaust method for a decoupled brake control system as claimed in claim 1, characterized in that: The redundant brake controller comprises a motor pump, a first boost valve and an accumulator, wherein the accumulator is connected to the front wheel ends on both sides through the first boost valve; The method of controlling the brake fluid in the oil pot to flow into the front wheel ends on both sides through the redundant brake controller to discharge the brake fluid gas in the master cylinder cavity, the rear wheel ends on both sides and the front wheel ends on both sides includes: controlling the operation of the motor pump to control the first booster valve to open, so that the brake fluid in the oil pot passes through the accumulator and the first booster valve in turn, and flows into the front wheel ends on both sides, so as to discharge the brake fluid gas in the master cylinder cavity, the rear wheel ends on both sides and the front wheel ends on both sides.

3. A brake fluid exhaust method for a decoupled brake control system as claimed in claim 2, characterized in that: After the gas of the brake fluid in the master cylinder cavity, the rear wheel ends on both sides and the front wheel ends on both sides is discharged, the method further includes: controlling the motor pump to stop running and controlling the first boost valve to close.

4. A brake fluid exhaust method for a decoupled brake control system as claimed in claim 1, characterized in that: The master brake controller also includes a simulator valve, and the master cylinder chamber is connected to the pedal simulator through the simulator valve; controlling the brake fluid in the oil pot to flow into the pedal simulator to discharge the gas of the brake fluid in the pedal simulator includes: controlling the simulator valve to open, and controlling the brake fluid in the oil pot to flow into the pedal simulator along the master cylinder and the simulator valve in sequence to discharge the gas of the brake fluid in the pedal simulator.

5. The brake fluid exhaust method of a decoupled brake control system according to claim 1, characterized in that: The main brake controller also includes a motor, which is used to control the piston in the pressure building module cavity; The controlling the brake fluid in the oil pot to flow into the front wheel ends on both sides and the rear wheel ends on both sides through the pressure building module to discharge the gas of the brake fluid in the pressure building module includes: controlling the operation of the motor to move the piston to suck the brake fluid in the oil pot into the pressure building module cavity, thereby flowing into the front wheel ends on both sides and the rear wheel ends on both sides through the pressure building module to discharge the gas of the brake fluid in the pressure building module.

6. The brake fluid exhaust method of a decoupled brake control system according to claim 1, characterized in that: The master brake controller further includes a master cylinder isolation valve and a second booster valve, the front wheel ends on both sides and the rear wheel ends on both sides are connected to the master cylinder chamber through the master cylinder isolation valve; the front wheel ends on both sides and the rear wheel ends on both sides are connected to the pressure building module through the second booster valve; The brake fluid exhaust method further comprises: In response to the exhaust check instruction, the master cylinder isolation valve is controlled to be closed, the second booster valve is controlled to be opened, and the first booster valve is controlled to be opened, so as to build up pressure on the front wheel ends on both sides and the rear wheel ends on both sides by controlling the brake fluid in the oil tank to flow to the front wheel ends on both sides and the rear wheel ends on both sides; The pressure values ​​of the front wheel ends on both sides and the rear wheel ends on both sides are acquired, and whether the gas of the decoupling brake control system is exhausted is determined based on the pressure values.

7. A brake fluid exhaust method for a decoupled brake control system as claimed in claim 1, characterized in that: Before responding to the first exhaust command, the method further includes: establishing a diagnostic connection between the main brake controller and a diagnostic instrument, wherein the diagnostic instrument is used to send a first exhaust command, a second exhaust command and a third exhaust command to the main brake controller.

8. A brake fluid exhaust device for decoupling a brake control system, characterized in that: The decoupling brake system is provided on the target vehicle, and the decoupling brake control system includes a main brake controller and a redundant brake controller; The main brake controller is connected to the redundant brake controller; the redundant brake controller is connected to the front wheel ends on both sides of the target vehicle, and the main brake controller is connected to the rear wheel ends on both sides of the target vehicle; the main brake controller and the redundant brake controller are both connected to the oil tank of the target vehicle; the main brake control system includes a master cylinder chamber, a pedal simulator and a pressure building module; The brake fluid exhaust device comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other through the communication bus; The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the operation of the brake fluid exhaust method of the decoupled brake control system as described in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that: The storage medium stores at least one executable instruction, and when the executable instruction is executed on the brake fluid exhaust device of the decoupled brake control system, the brake fluid exhaust device of the decoupled brake control system performs the operation of the brake fluid exhaust method of the decoupled brake control system as described in any one of claims 1 to 7.

10. A vehicle, characterized in that: The vehicle is provided with a decoupled brake system and a domain controller, and the decoupled brake control system includes a main brake controller and a redundant brake controller; The main brake controller is connected to the redundant brake controller; the redundant brake controller is connected to the front wheel ends on both sides of the target vehicle, and the main brake controller is connected to the rear wheel ends on both sides of the target vehicle; the main brake controller and the redundant brake controller are both connected to the oil tank of the target vehicle; the main brake control system includes a master cylinder chamber, a pedal simulator and a pressure building module; The domain controller is used to execute the operation of the brake fluid venting method of the decoupled brake control system as described in any one of claims 1 to 7.

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