A method, device, medium and product for controlling fluid replenishment of a braking system

Abstract

The present invention relates to the technical field of vehicle braking systems, and particularly relates to a braking system fluid replenishment control method, device, medium and product. The braking system fluid replenishment control method includes obtaining the hydraulic pressure value of the brake fluid in the brake line after the pressure building module builds pressure; determining whether the hydraulic pressure value reaches the hydraulic threshold required for vehicle braking; when the hydraulic pressure value does not reach the hydraulic threshold, storing the brake fluid in the brake line and controlling the pressure building module to build pressure again. In the case of thermal fade, the present application can store the existing brake fluid in the brake line in the brake line, and the vehicle's braking system controls the pressure building module to build pressure again, so that the oil in the oil pot is extracted again as brake fluid and enters the brake line, so that the brake fluid entering the brake line this time is mixed and superimposed with the brake fluid for pressure holding, thereby increasing the hydraulic pressure in the brake line to meet the vehicle braking requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle brake systems, and in particular to a brake system fluid replenishment control method, equipment, medium and product. Background Art

[0002] With the gradual improvement of the performance level and maturity of intelligent driving systems, the functions of vehicle braking systems are gradually enriched and improved. The current redundant solution is the IPB+RBU solution, that is, the two-box solution, with an additional RBU (equivalent to the pressure building unit) used for backup pressure building.

[0003] Although the above redundancy solution can effectively improve the backup capability of the wire control brake, so that the brake system can meet the braking needs of the vehicle, the brake system is prone to thermal decay as the working time increases or the working environment changes.

[0004] When the braking demand of the vehicle remains unchanged, the braking force generated by the pressure building unit after pressure building will be lost in the process of being transmitted to the wheel end of the vehicle due to thermal decay, resulting in a decrease in the actual braking force reaching the wheel end of the vehicle, making it impossible to meet the braking demand of the vehicle. Summary of the invention

[0005] In view of the above problems existing in the prior art, the present invention provides a brake system fluid replenishment control method, equipment, medium and product.

[0006] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0007] In a first aspect, a brake system fluid replenishment control method is provided, comprising:

[0008] Obtaining a hydraulic pressure value of the brake fluid in the brake circuit after the pressure building module builds pressure;

[0009] Determining whether the hydraulic pressure value reaches a hydraulic pressure threshold required for vehicle braking;

[0010] When the hydraulic pressure value does not reach the hydraulic pressure threshold, the brake fluid is stored in the brake circuit, and the pressure building module is controlled to build pressure again.

[0011] Preferably, a first solenoid valve is provided, which is arranged on the brake line, and the brake fluid returns to the oil tank through the first solenoid valve;

[0012] When the hydraulic pressure value does not reach the hydraulic pressure threshold, the first solenoid valve is controlled to be closed to store the brake fluid in the brake circuit.

[0013] Preferably, a second solenoid valve is provided, which is arranged in parallel with the first solenoid valve on the brake circuit, and the brake fluid can be output to the vehicle wheel end through the second solenoid valve;

[0014] When the hydraulic pressure value does not reach the hydraulic pressure threshold, the second solenoid valve is controlled to open, and the pressure building module is controlled to build pressure again.

[0015] Preferably, a redundant motor and a pump body are provided between the second solenoid valve and the vehicle wheel end; the pressure building module comprises a redundant pressure building module composed of the redundant motor and the pump body;

[0016] When the hydraulic pressure value does not reach the hydraulic threshold, the redundant pressure building module can extract oil from the oil tank through the second solenoid valve to achieve pressure building again.

[0017] Preferably, a redundant motor, a pump body and a liquid storage tank are provided between the second solenoid valve and the vehicle wheel end; the pressure building module comprises a redundant pressure building module composed of the redundant motor and the pump body;

[0018] When the hydraulic pressure value does not reach the hydraulic threshold, the redundant pressure building module can extract oil from the liquid storage tank to achieve pressure building again.

[0019] Preferably, the pressure building module further comprises a mechanical pressure building module consisting of a pedal and a master cylinder and a main pressure building module consisting of a main motor and a piston chamber;

[0020] The pressure building of the pressure building module is achieved by at least one of the main pressure building module, the redundant pressure building module and the mechanical pressure building module.

[0021] Preferably, when the first solenoid valve is closed, the fourth solenoid valve is controlled to open, and the main motor can control the piston chamber to extract oil from the oil pot through the first one-way valve and the fourth solenoid valve for re-pressure building of the pressure building module.

[0022] In a second aspect, an electronic device is provided, the electronic device comprising:

[0023] one or more processors; and

[0024] A memory storing computer program instructions, which, when executed, cause the processor to perform the steps of the method described above.

[0025] According to a third aspect, a computer-readable medium is provided, on which a computer program / instruction is stored, and the computer program / instruction implements the steps of the above-mentioned method when executed by a processor.

[0026] In a fourth aspect, a computer program product is provided, comprising a computer program / instruction, which implements the steps of the above-mentioned method when executed by a processor.

[0027] The present invention has at least the following beneficial effects:

[0028] The present application can preserve the existing brake fluid in the brake circuit under thermal decay conditions, that is, maintain pressure. The vehicle's braking system controls the pressure building module to build pressure again, so that at least one of the mechanical pressure building module, the main pressure building module and the redundant pressure building module works, so that the oil in the oil tank is again drawn out as brake fluid to enter the brake circuit, so that the brake fluid entering the brake circuit this time is mixed and superimposed with the brake fluid for maintaining pressure, thereby increasing the fluid pressure in the brake circuit to meet the vehicle's braking needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A flow chart showing a brake system fluid replenishment control method in some embodiments of the present application is shown;

[0030] Figure 2 A schematic diagram showing the structure of a braking system of a vehicle in some embodiments of the present application is shown;

[0031] Figure 3 A schematic diagram showing that after the pressure maintaining action is implemented in some embodiments of the present application, the pressure building module builds pressure again through the redundant pressure building module;

[0032] Figure 4 A schematic diagram showing that after the pressure-maintaining action is implemented in some embodiments of the present application, the main motor drives the piston in the piston chamber to pull back and replenish the fluid;

[0033] Figure 5 A schematic diagram showing that after the pressure-maintaining action is implemented in some embodiments of the present application, the pressure-building module builds up pressure again through the redundant pressure-building module, and at the same time the main motor drives the piston in the piston chamber to pull back and replenish fluid;

[0034] Figure 6 A line chart showing that when the pressure building fails to meet the vehicle braking requirement once in some embodiments of the present application, after the pressure maintaining action is implemented, the pressure building module builds pressure again through the redundant pressure building module;

[0035] Figure 7 A line chart showing that when the pressure building module builds up pressure again through the main pressure building module after the pressure maintaining action is implemented in some embodiments of the present application when the pressure building fails to meet the vehicle braking demand in the first time;

[0036] Figure 8 A line chart showing that when the pressure buildup fails to meet the vehicle braking requirement once in some embodiments of the present application, after the pressure maintaining action is implemented, the pressure building module first builds pressure again through the redundant pressure building module and then builds pressure again through the main pressure building module;

[0037] Fig. 9 A schematic diagram of the structure of a brake system fluid replenishment control device in some embodiments of the present application is shown.

[0038] The parts indicated by the numbers in the accompanying drawings are as follows:

[0039] 10. Braking circuit; 11. Branch circuit; 12. First one-way valve; 110. Oil pot; 120. Pedal; 130. Master cylinder; 140. Main motor; 150. Piston chamber; 160. Redundant motor; 170. Pump body; 180. Vehicle wheel end; 190. First solenoid valve; 210. Second solenoid valve; 220. Liquid storage tank; 230. Second one-way valve; 240. Pressure sensor; 250. Third solenoid valve; 260. Fourth solenoid valve. DETAILED DESCRIPTION

[0040] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0041] First, as Figure 1-Figure 2 As shown, a brake system fluid replenishment control method is provided in this embodiment, which is applied to the situation where the braking force generated by the brake system of the vehicle cannot meet the braking demand of the vehicle under the problem of thermal decay, and is applied to the situation where the first pressure buildup cannot meet the braking demand of the vehicle due to the allocation of the working mode of the brake system of the vehicle without thermal decay. Specifically, a complete vehicle brake system is introduced and explained; the brake system includes an oil pot 110, a pedal 120, a master cylinder 130, a main motor 140, a piston chamber 150, a redundant motor 160 and a pump body 170, wherein the pedal 120 and the master cylinder 130 constitute a mechanical pressure building module, the main motor 140 and the piston chamber 150 constitute a main pressure building module, and the redundant motor 160 and the pump body 170 constitute a redundant pressure building module, the mechanical pressure building module and the main pressure building module are connected in parallel between the oil pot 110 and the redundant pressure building module, and the redundant pressure building module is further connected to the vehicle wheel end 180 to form a complete brake circuit 10. It should be noted that the brake circuit 10 includes a branch line 11, and the above-mentioned main pressure building module is arranged on the branch line 11. The main pressure building module is connected in parallel with the mechanical pressure building module through the branch line 11. At the same time, a first one-way valve 12 is arranged on the branch line 11. Based on the setting of the first one-way valve 12, the oil in the oil tank 110 can be input into the main pressure building module through the branch line 11, while the oil in the brake circuit 10 and the main pressure building module cannot return to the oil tank 110 through the branch line 11.

[0042] Based on the above vehicle braking system, a braking system fluid replenishment control method of this embodiment includes:

[0043] Step S1, obtaining the hydraulic pressure value of the brake fluid in the brake circuit 10 after the pressure is built up by the pressure building module.

[0044] It should be noted that the pressure building module proposed herein includes the above-mentioned mechanical pressure building module, main pressure building module and redundant pressure building module. In step S1, at least one of the mechanical pressure building module, main pressure building module and redundant pressure building module works to build pressure, so that the oil in the oil tank 110 is drawn into the brake circuit 10 as brake fluid. In this process, due to thermal decay, the liquid pressure in the brake circuit 10 is less than the liquid pressure actually generated by the pressure building module, and the liquid pressure value of the brake fluid actually in the brake circuit 10 is obtained by a certain measurement method.

[0045] Step S2: Determine whether the hydraulic pressure value reaches the hydraulic pressure threshold required for vehicle braking.

[0046] It should be noted that the hydraulic threshold required for vehicle braking is not fixed, and it will change according to the specific vehicle driving state and the external environment. The preferred hydraulic threshold is the current vehicle braking demand. In this step S2, the hydraulic pressure value obtained in step S1 is compared with the hydraulic threshold required for vehicle braking, and then it is determined whether the current hydraulic pressure value can meet the vehicle braking demand. For example, after a pressure buildup by the pressure building module, the actual hydraulic pressure value in the brake circuit 10 is 100 bar in the case of thermal decay, and the hydraulic pressure required for the current vehicle braking is 180 bar. At this time, the hydraulic pressure in the brake circuit 10 cannot meet the vehicle braking demand. If the hydraulic pressure required for the current vehicle braking is 100 bar, then the hydraulic pressure in the brake circuit 10 can meet the vehicle braking demand.

[0047] Step S3: When the hydraulic pressure value does not reach the hydraulic pressure threshold, the brake fluid is stored in the brake circuit 10, and the pressure building module is controlled to build pressure again.

[0048] Taking the above-mentioned case where the actual hydraulic pressure value in the brake circuit 10 is 100 bar under the condition of thermal decay, and the hydraulic pressure required for the current vehicle braking is 180 bar as an example, of course, when the first pressure building work allocated by the brake system in the case of no thermal decay makes the hydraulic pressure value in the brake circuit 10 100 bar, the same reason is as follows: at this time, the brake fluid in the brake circuit 10 cannot meet the braking needs of the vehicle. In this step S3, the existing brake fluid in the brake circuit 10 is stored in the brake circuit 10, that is, the pressure is maintained, and the vehicle's brake system controls the pressure building module to build pressure again, so that at least one of the mechanical pressure building module, the main pressure building module and the redundant pressure building module works, so that the oil in the oil tank 110 is extracted again as brake fluid and enters the brake circuit 10, so that the brake fluid entering the brake circuit 10 this time is mixed and superimposed with the brake fluid for pressure maintenance, thereby increasing the hydraulic pressure in the brake circuit 10 to meet the braking needs of the vehicle. It should be noted that, when the pressure building module forms a hydraulic pressure of at least 80 bar after building up pressure again, the sum of the hydraulic pressure and the 100 bar hydraulic pressure for pressure maintenance is not less than 180 bar. At this time, the brake circuit 10 has brake fluid with sufficient hydraulic pressure, which can better meet the braking needs of the vehicle; when the hydraulic pressure of the brake fluid formed after the pressure building module builds up pressure again is less than 80 bar, the sum of the hydraulic pressure and the 100 bar hydraulic pressure for pressure maintenance is less than 180 bar. At this time, the brake fluid in the brake circuit 10 still cannot meet the braking needs of the vehicle. At this time, the mixed and superimposed brake fluid is pressure-maintained in the brake circuit 10 again, and the vehicle's braking system controls the pressure building module to build up pressure again until the brake fluid in the brake circuit 10 has a hydraulic pressure of at least 180 bar to meet the braking needs of the vehicle.

[0049] In some embodiments, a first solenoid valve 190 is provided in the brake circuit 10. Specifically, the mechanical pressure building module and the main pressure building module are connected in parallel between the oil tank 110 and the first solenoid valve 190, and the redundant pressure building module is respectively connected to the first solenoid valve 190 and the vehicle wheel end 180.

[0050] In the above step S3, when the hydraulic pressure value does not reach the hydraulic pressure threshold, the brake fluid is stored in the brake line 10. Specifically, the brake system controls the first solenoid valve 190 to be closed.

[0051] It can be understood that after the mechanical pressure building module, the main pressure building module and the redundant pressure building module extract the oil in the oil tank 110 as brake fluid and enter the brake circuit 10, the brake fluid can flow toward the vehicle wheel end 180, so that the brake fluid can flow between the first solenoid valve 190 and the vehicle wheel end 180. When the first solenoid valve 190 is in the closed state, the brake circuit 10 can be disconnected, so that the brake fluid can be stored between the first solenoid valve 190 and the vehicle wheel end 180, achieving the effect of maintaining pressure, and then the vehicle's braking system can control the pressure building module to build pressure again until the brake fluid in the brake circuit 10 can meet the vehicle's braking needs.

[0052] It is worth mentioning that the function of the first solenoid valve 190 here is not simply to store the brake fluid between the first solenoid valve 190 and the vehicle wheel end 180 . It can be understood that when the first solenoid valve 190 is in a closed state, the brake circuit 10 is disconnected. On the one hand, it can prevent the brake fluid from flowing back to the oil pot 110, so that a pressure-maintaining effect can be formed. On the other hand, it can prevent the brake fluid in the brake circuit 10 from flowing back when the pressure-building module extracts the oil again, so as to avoid affecting the effect of re-pressure building. For example, after the pressure building through the main pressure-building module fails to meet the braking demand of the vehicle, when the main pressure-building module is used to build pressure again, the main pressure-building module will perform a back-drawing action to extract oil to fill the piston chamber 150. At this time, the first solenoid valve 190 is in a closed state, and the main pressure-building module can only extract the oil in the oil pot 110 through the mechanical pressure-building module and / or the branch line 11. If the first solenoid valve 190 is not set, the main pressure-building module will also extract the existing brake fluid in the brake circuit 10, so that the original brake fluid in the brake circuit 10 is lost, so that the pressure-building effect of the main pressure-building module is reduced or lost.

[0053] In some embodiments, a second solenoid valve 210 is provided in the brake circuit 10 . The second solenoid valve 210 is arranged in parallel with the first solenoid valve 190 in the brake circuit 10 .

[0054] In the above step S3, when the hydraulic pressure value does not reach the hydraulic threshold, the brake fluid is stored in the brake line 10, and the pressure building module is controlled to build pressure again. The specific action is that the brake system controls the first solenoid valve 190 to close and controls the second solenoid valve 210 to open.

[0055] It is understandable that, after the pressure building module builds pressure, the hydraulic pressure value does not reach the hydraulic threshold value. At this time, the first solenoid valve 190 is controlled to be closed, so that the brake fluid is stored between the first solenoid valve 190 and the vehicle wheel end 180, and the second solenoid valve 210 is controlled to be opened, so that when the pressure building module builds pressure again, the oil extracted from the oil pot 110 can be transported to the first solenoid valve 190 and the vehicle wheel end 180 through the second solenoid valve 210, so that the brake fluid that builds pressure again can be mixed and superimposed with the brake fluid in the pressure maintenance, thereby achieving the effect of increasing the hydraulic pressure of the brake fluid, so that the braking requirements of the vehicle can be met. Further, the second solenoid valve 210 can also be equivalent to a one-way valve, so that when the second solenoid valve 210 is in an open state, it can only satisfy the flow of oil between the first solenoid valve 190 and the vehicle wheel end 180, but cannot achieve the reverse flow of oil between the first solenoid valve 190 and the vehicle wheel end 180 back to the oil pot 110, thereby better ensuring the effect of building pressure again.

[0056] In some embodiments, a fluid storage tank 220 is provided in the brake circuit 10 between the second solenoid valve 210 and the vehicle wheel end 180. The fluid storage tank 220 is provided to cope with more extreme vehicle conditions. Specifically, there is a situation where the pressure building module extracts oil from the oil pot 110 and outputs it to the vehicle wheel end 180 as brake fluid, and then discharges the brake fluid into the fluid storage tank 220 after the vehicle is braked.

[0057] In the above step S3, when the hydraulic pressure value does not reach the hydraulic threshold, the brake fluid is stored in the brake circuit 10, and the pressure building module is controlled to build pressure again. The braking system controls the first solenoid valve 190 to close, and the redundant pressure building module can draw oil from the fluid storage tank 220 as brake fluid and input it between the first solenoid valve 190 and the vehicle wheel end 180.

[0058] It can be understood that at this time, the second solenoid valve 210 can be in an open state or a closed state. The pressure building module builds up pressure again through the redundant pressure building module. The redundant motor 160 will drive the pump body 170 to extract the oil in the liquid storage tank 220, so that the oil in the liquid storage tank 220 is input as brake fluid between the first solenoid valve 190 and the vehicle wheel end 180, thereby increasing the brake fluid in the overall brake circuit 10, thereby achieving the purpose of meeting the vehicle braking needs.

[0059] It should be noted that the fluid storage tank 220 is connected to the pump body 170 via a second one-way valve 230, and the second one-way valve 230 can satisfy the oil in the brake line 10 to flow into the fluid storage tank 220. At the same time, when an outward pumping force is applied to the second one-way valve 230 through the pump body 170, the second one-way valve 230 can also satisfy the oil in the fluid storage tank 220 to flow out into the brake line 10.

[0060] In some embodiments, a pressure sensor 240 is provided in the brake line 10 .

[0061] In the above step S1, at least one of the mechanical pressure building module, the main pressure building module and the redundant pressure building module works to build pressure, so that the oil in the oil tank 110 is extracted as brake fluid and enters the brake circuit 10. In this process, due to thermal decay, the liquid pressure in the brake circuit 10 is smaller than the liquid pressure actually generated by the pressure building module. The pressure sensor 240 can better obtain the liquid pressure value of the brake fluid actually in the brake circuit 10, and can achieve a real-time monitoring effect.

[0062] In the above step S2, the braking system of the vehicle obtains the hydraulic pressure value detected by the pressure sensor 240 and determines whether to perform a pressure holding action and build up pressure again.

[0063] Of course, in this embodiment, the pressure sensor 240 is used to detect the hydraulic pressure value in the brake circuit 10. In fact, other methods can also be used, such as detecting the temperature of the brake disc, as long as the corresponding technical effects and advantages can be achieved.

[0064] In order to further explain in detail a brake system fluid replenishment control method in this embodiment, the following is a specific practical explanation. The mechanical pressure building module in the vehicle's brake system also includes a third solenoid valve 250, and the main pressure building module also includes a fourth solenoid valve 260, wherein the third solenoid valve 250 is located on the side of the master cylinder 130 away from the oil pot 110, and the piston chamber 150 is connected to the branch line 11 through the fourth solenoid valve 260.

[0065] Taking the pressure building through the main pressure building module as an example, the first solenoid valve 190 and the fourth solenoid valve 260 are in the power-on open state, the second solenoid valve 210 and the third solenoid valve 250 are in the power-off closed state, the main motor 140 and the piston chamber 150 extract the oil in the oil pot 110 through the fourth solenoid valve 260 and the branch line 11, at this time, the driver steps on the pedal 120 so that the main motor 140 controls the piston in the piston chamber 150 to push the oil into the brake line 10 as brake fluid, and the brake fluid enters the first solenoid valve 190 and the vehicle through the first solenoid valve 190 in the brake line 10. Between the wheel ends 180, during this process, the pressure sensor 240 can detect the hydraulic pressure of the brake fluid in the brake circuit 10 and thus obtain a real-time hydraulic pressure value; after the vehicle's braking system obtains the hydraulic pressure value, it compares it with the hydraulic threshold required for the current vehicle braking, and then determines whether the brake fluid in the current brake circuit 10 can meet the current vehicle braking needs; taking the hydraulic pressure value detected by the pressure sensor 240 as 100 bar, and the hydraulic pressure required for the current vehicle braking is 180 bar as an example, in this case, the brake fluid in the brake circuit 10 cannot meet the current vehicle braking needs.

[0066] Based on the above, the vehicle's braking system controls the first solenoid valve 190 to close, preserves the brake fluid in the brake circuit 10 after the pressure buildup, that is, maintains the brake fluid pressure between the first solenoid valve 190 and the vehicle wheel end 180, and controls the second solenoid valve 210 to open.

[0067] There are several ways to build up pressure again:

[0068] The first one is combined Figure 4 and Figure 7 As shown, after the first solenoid valve 190 is closed, the main motor 140 drives the piston in the piston chamber 150 to pull back and extract the oil in the oil pot 110 and push the oil in the piston chamber 150 out again to build up pressure, so that the oil in the piston chamber 150 is output to the brake circuit 10 as brake fluid, and the brake fluid formed by the second pressure buildup is input into the space between the first solenoid valve 190 and the vehicle wheel end 180 through the second solenoid valve 210 and mixed with the pressure-maintaining brake fluid, and the brake fluid formed by the second pressure buildup will also be detected by the pressure sensor 240. If the liquid pressure of the brake fluid formed by the second pressure buildup is less than 80 bar, a third pressure buildup is required until the vehicle braking requirements can be met.

[0069] The second type is combined Figure 3 and Figure 6 As shown, after the first solenoid valve 190 is closed, the redundant motor 160 and the pump body 170 draw oil from the oil tank 110 through the second solenoid valve 210 and the branch line 11 to build up pressure, and then the pump body 170 pumps the drawn oil as brake fluid to between the first solenoid valve 190 and the vehicle wheel end 180 and mixes it with the pressure-maintaining brake fluid. The brake fluid formed by the second pressure buildup will also be detected by the pressure sensor 240. If the liquid pressure of the brake fluid formed by the second pressure buildup is less than 80 bar, a third pressure buildup is required until the vehicle braking requirements can be met.

[0070] The third type, combined Figure 6 As shown, after the first solenoid valve 190 is closed, the redundant motor 160 and the pump body 170 build up pressure by extracting oil from the reservoir 220 as brake fluid. The pump body 170 extracts the oil from the reservoir 220 as brake fluid between the first solenoid valve 190 and the vehicle wheel end 180 and mixes it with the pressure-maintaining brake fluid. The brake fluid formed by the second pressure buildup will also be detected by the pressure sensor 240. If the hydraulic pressure of the brake fluid formed by the second pressure buildup is less than 80 bar, a third pressure buildup is required until the vehicle braking requirements can be met.

[0071] The fourth method is to open the third solenoid valve 250 after the first solenoid valve 190 is closed, and the mechanical pressure building module builds pressure by extracting oil from the oil tank 110, and inputs the oil in the oil tank 110 as brake fluid through the second solenoid valve 210 to between the first solenoid valve 190 and the vehicle wheel end 180 and mixes with the pressure-maintaining brake fluid. The brake fluid formed by the second pressure building will also be detected by the pressure sensor 240. If the hydraulic pressure of the brake fluid formed by the second pressure building is less than 80 bar, a third pressure building is required until the vehicle braking requirements can be met.

[0072] Furthermore, in the second, third and fourth methods described above, after the first solenoid valve 190 is closed, the redundant pressure building module and / or the mechanical pressure building module are used to build up pressure again. During this process, since the fourth solenoid valve 260 is in an open state, the main motor 140 can control the piston in the piston chamber 150 to pull back and extract the oil in the oil pot 110, such as Figure 5 This has two advantages. First, the main motor 140 and the redundant motor 160 can simultaneously work to accelerate the flow rate of the oil in the oil tank 110 into the brake circuit 10, thereby improving the efficiency of vehicle braking under thermal decay conditions. Second, the piston chamber 150 can be filled with oil in advance to prepare for the need to build pressure again. Figure 8 As shown, for example, when the hydraulic pressure of the brake fluid formed by the redundant pressure building module is less than 80 bar, a third pressure building is required. At this time, the third pressure building can be carried out using the prepared main pressure building module. The main pressure building module can immediately push the oil in the piston chamber 150 out for pressure building, and the effect speed is faster, which can improve the efficiency of vehicle braking under thermal decay conditions.

[0073] In a second aspect, the present embodiment provides an electronic device. The electronic device may be a digital computer in various forms, such as a laptop computer, a desktop computer, a workbench, a personal digital assistant, a server, a blade server, a mainframe computer, etc. The electronic device may also be a mobile device in various forms, such as a personal digital processing, a cellular phone, a smart phone, a wearable device, and other similar computing devices.

[0074] The electronic device includes: one or more processors; and a memory storing computer program instructions, wherein when the computer program instructions are executed, the processor executes the steps of the method provided in any one or more of the above embodiments. Fig. 9 An exemplary structural diagram of the electronic device is disclosed. Fig. 9As shown, the electronic device includes: one or more processors 1101, a memory 1102, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses and can be installed on a common motherboard or installed in other ways as needed. The processor can process instructions executed in the electronic device, including instructions stored in or on the memory to display graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some other embodiments, if necessary, multiple processors and / or multiple buses can be used with multiple memories and multiple memories. Similarly, multiple electronic devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Among them, the components shown in this article, their connections and relationships, and their functions are only examples, and are not intended to limit the implementation of the present application described and / or required herein.

[0075] The electronic device may further include: an input device 1103 and an output device 1104. The processor 1101, the memory 1102, the input device 1103 and the output device 1104 may be connected via a bus or other means. Fig. 9 The example of connecting through bus is taken in the following.

[0076] The input device 1103 can receive input digital or character information, and generate key signal input related to the user settings and function control of the electronic device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator rod, one or more mouse buttons, a trackball, a joystick and other input devices. The output device 1104 may include a display device, an auxiliary lighting device (e.g., an LED) and a tactile feedback device (e.g., a vibration motor), etc. The display device may include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display and a plasma display. In some embodiments, the display device may be a touch screen.

[0077] To provide interaction with a user, the electronic device may be a computer. The computer has: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball), through which the user can provide input to the computer. Other types of devices may also be used to provide interaction with a user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0078] In the embodiments of the present application, a computer program / instruction is stored on a computer-readable medium, and when the computer program / instruction is executed by a processor, the steps of the method provided by any one or more of the above embodiments are implemented. The computer-readable medium may be included in the electronic device described in the above embodiments; or it may exist independently without being assembled into the device. The above computer-readable medium carries one or more computer-readable instructions.

[0079] The memory 1102 can be used as a non-transient computer-readable storage medium, which can be used to store non-transient software programs, non-transient computer executable programs and modules. The processor 1101 executes various functional applications and data processing of the server by running the non-transient software programs, instructions and modules stored in the memory 1102, so as to implement the program instructions / modules corresponding to the method provided by any one or more embodiments in the embodiments of the present application.

[0080] The memory 1102 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 1102 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory 1102 may optionally include a memory remotely arranged relative to the processor 1101, and these remote memories may be connected to the electronic device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0081] It should be noted that the computer-readable medium described in this application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this application, a computer-readable medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device.

[0082] Computer readable media include permanent and non-permanent, removable and non-removable media, and can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, modules of programs or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0083] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0084] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware or any combination thereof. For example, an application specific integrated circuit (ASIC), a general-purpose computer or any other similar hardware device may be used to implement the embodiments. In some embodiments, the software program of the present application may be executed by a processor to implement the above steps or functions. Similarly, the software program of the present application (including related data structures) may be stored in a computer-readable recording medium, such as a RAM memory, a magnetic or optical drive or a floppy disk and the like. In addition, some steps or functions of the present application may be implemented by hardware, for example, as a circuit that cooperates with a processor to perform various steps or functions.

[0085] The computer program product provided in the embodiment of the present application includes one or more computer programs / instructions, and when the computer program / instructions are executed by the processor, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, a computer, a server, or a data center to another website site, a computer, a server, or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrations. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

[0086] The flow chart or block diagram in the accompanying drawings shows the possible architecture, function and operation of the equipment, method and computer program product according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated system for hardware that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0087] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. A brake system fluid replenishment control method, characterized in that: include, Obtaining a hydraulic pressure value of the brake fluid in the brake circuit after the pressure building module builds pressure; the pressure building module includes a mechanical pressure building module, a main pressure building module and a redundant pressure building module, the mechanical pressure building module and the main pressure building module are connected to the oil tank and the redundant pressure building module in parallel, and a first solenoid valve is arranged in the brake pipeline between the main pressure building module and the redundant pressure building module; Determining whether the hydraulic pressure value reaches a hydraulic pressure threshold required for vehicle braking, wherein the hydraulic pressure threshold is a hydraulic pressure that meets the current braking demand of the vehicle; When the hydraulic pressure value does not reach the hydraulic pressure threshold, storing the brake fluid in the brake circuit includes: controlling the first solenoid valve to close, storing the brake fluid in the brake circuit; The pressure building module is controlled to build up pressure again, and the pressure building module builds up pressure again through the operation of at least one of the mechanical pressure building module, the main pressure building module and the redundant pressure building module.

2. The brake system fluid replenishment control method according to claim 1, characterized in that: Providing a first solenoid valve, which is arranged on the brake line, and the brake fluid returns to the oil tank through the first solenoid valve; When the hydraulic pressure value does not reach the hydraulic pressure threshold, the first solenoid valve is controlled to be closed to store the brake fluid in the brake circuit.

3. The brake system fluid replenishment control method according to claim 2, characterized in that: Providing a second solenoid valve, which is arranged in parallel with the first solenoid valve on the brake line, and the brake fluid can be output to the vehicle wheel end through the second solenoid valve; When the hydraulic pressure value does not reach the hydraulic pressure threshold, the second solenoid valve is controlled to open, and the pressure building module is controlled to build pressure again.

4. The brake system fluid replenishment control method according to claim 3, characterized in that: A redundant motor and a pump body are provided between the second solenoid valve and the vehicle wheel end; the redundant motor and the pump body constitute the redundant pressure building module; When the hydraulic pressure value does not reach the hydraulic threshold, the redundant pressure building module can extract oil from the oil tank through the second solenoid valve to achieve pressure building again.

5. The brake system fluid replenishment control method according to claim 3 or 4, characterized in that: A redundant motor, a pump body and a liquid storage tank are provided between the second solenoid valve and the vehicle wheel end; the redundant motor and the pump body constitute the redundant pressure building module; When the hydraulic pressure value does not reach the hydraulic threshold, the redundant pressure building module can extract oil from the liquid storage tank to achieve pressure building again.

6. The brake system fluid replenishment control method according to claim 4, characterized in that: A mechanical pressure building module consisting of a pedal and a master cylinder, and a main pressure building module consisting of a main motor and a piston chamber; The pressure building of the pressure building module is achieved by at least one of the main pressure building module, the redundant pressure building module and the mechanical pressure building module.

7. The brake system fluid replenishment control method according to claim 6, characterized in that: When the first solenoid valve is closed, the fourth solenoid valve is controlled to open, and the main motor can control the piston chamber to extract oil from the oil pot through the first one-way valve and the fourth solenoid valve for re-pressure building of the pressure building module.

8. An electronic device, characterized in that: The electronic device comprises: one or more processors; as well as A memory storing computer program instructions, which, when executed, cause the processor to perform the steps of the method as claimed in any one of claims 1 to 7.

9. A computer readable medium having a computer program / instructions stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer program product comprising a computer program / instructions, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method described in any one of claims 1 to 7 are implemented.

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