Fluid replenishment control method for brake system, and device, medium and product

Abstract

Provided are a fluid replenishment control method for a brake system, and a device, a medium and a product. The fluid replenishment control method for a brake system comprises: after a pressure build-up module performs pressure build-up, acquiring a hydraulic pressure value of a brake fluid in a brake line (10) (S1); determining whether the hydraulic pressure value reaches a hydraulic pressure threshold value required for vehicle braking (S2); and when the hydraulic pressure value does not reach the hydraulic pressure threshold value, storing the brake fluid in the brake line (10), and controlling the pressure build-up module to perform pressure build-up again (S3).

Description

Braking system fluid replenishment control methods, equipment, media and products

[0001] This application claims priority to Chinese Patent Application No. 202411555876.2, filed with the Chinese Patent Office on November 4, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of vehicle braking system technology, such as a braking system fluid replenishment control method, device, medium, and product. Background Technology

[0003] As the performance and maturity of intelligent driving systems gradually improve, the functions of vehicle braking systems are also becoming richer and more complete. The current redundancy solution is the IPB+RBU solution, also known as the two-box solution, which adds an RBU (equivalent to a pressure build-up unit) to back up the pressure build-up.

[0004] While the aforementioned redundancy scheme can effectively improve the backup capability of brake-by-wire, enabling the braking system to meet the vehicle's braking requirements, the braking system is prone to heat fade issues as operating time increases or the operating environment changes.

[0005] When the vehicle's braking demand remains constant, the braking force generated after the pressure build-up unit builds up pressure will be partially lost during the transmission to the vehicle's wheel ends due to thermal fade. This results in a smaller actual braking force reaching the vehicle's wheel ends, making it unable to meet the vehicle's braking demand. Summary of the Invention

[0006] In view of the above-mentioned problems in the related technologies, this application provides a method, device, medium and product for controlling fluid replenishment in a braking system.

[0007] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0008] Firstly, a method for controlling fluid replenishment in a braking system is provided, comprising,

[0009] Obtain the hydraulic pressure value of the brake fluid in the brake circuit after the pressure build-up module has built up the pressure; determine whether the hydraulic pressure value has reached the hydraulic threshold required for vehicle braking;

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

[0011] In some embodiments, a first solenoid valve is provided, which is disposed on the brake line, through which the brake fluid returns to the reservoir;

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

[0013] In some embodiments, a second solenoid valve is provided, which is connected 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;

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

[0015] In some embodiments, a redundant motor and a pump body are provided between the second solenoid valve and the vehicle wheel end; the pressure building module includes 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 draw oil from the oil reservoir through the second solenoid valve to achieve pressure building again.

[0017] In some embodiments, 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 includes a redundant pressure building module composed of the redundant motor and the pump body;

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

[0019] In some embodiments, the pressure building module further includes 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 up of the pressure building module is achieved through the operation of at least one of the main pressure building module, the redundant pressure building module, and the mechanical pressure building module.

[0021] In some embodiments, 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 draw oil from the oil reservoir through the first check valve and the fourth solenoid valve for re-pressurization of the pressure building module.

[0022] In a second aspect, an electronic device is provided, the electronic device comprising: one or more processors; and

[0023] A memory storing computer program instructions, which, when executed, cause the processor to perform the steps of the method described above.

[0024] Thirdly, a computer-readable medium is provided having a computer program / instructions stored thereon, which, when executed by a processor, implement the steps of the method described above.

[0025] Fourthly, a computer program product is provided, including a computer program / instructions that, when executed by a processor, implement the steps of the method described above.

[0026] This application has at least the following beneficial effects:

[0027] This application enables the preservation of existing brake fluid in the braking circuit under heat fade conditions, i.e., pressure maintenance. The vehicle's braking system control pressure-building module builds pressure again, causing at least one of the mechanical pressure-building module, main pressure-building module, and redundant pressure-building module to operate. This allows brake fluid to be drawn from the reservoir again and introduced into the braking circuit. The brake fluid entering the braking circuit this time mixes and overlaps with the brake fluid used for pressure maintenance, thereby increasing the hydraulic pressure in the braking circuit to meet the vehicle's braking requirements. Attached Figure Description

[0028] Figure 1 shows a flowchart of the brake system fluid replenishment control method in some embodiments of this application;

[0029] Figure 2 shows a schematic diagram of the braking system of a vehicle in some embodiments of this application;

[0030] Figure 3 shows a schematic diagram of the pressure building module building pressure again through the redundant pressure building module after the pressure holding action is performed in some embodiments of this application;

[0031] Figure 4 shows a schematic diagram of the main motor driving the piston in the piston chamber to pull back and replenish fluid after the pressure holding action is performed in some embodiments of this application;

[0032] Figure 5 shows a schematic diagram in some embodiments of this application that after the pressure holding action is performed, the pressure building module builds pressure again through the redundant pressure building module, while the main motor drives the piston in the piston chamber to pull back and replenish the fluid.

[0033] Figure 6 shows a line graph of the pressure building module building pressure again through the redundant pressure building module after the pressure holding action is implemented when the pressure building fails to meet the vehicle braking requirements in one embodiment of this application.

[0034] Figure 7 shows a line graph of the pressure building module building pressure again through the main pressure building module after the pressure holding action is implemented when the pressure building fails to meet the vehicle braking requirements in one embodiment of this application.

[0035] Figure 8 shows a line graph illustrating how, in some embodiments of this application, when the pressure build-up fails to meet the vehicle's braking requirements after the pressure holding action is implemented, the pressure build-up module first builds pressure again through the redundant pressure build-up module and then through the main pressure build-up module.

[0036] Figure 9 shows a schematic diagram of the structure of the brake system fluid replenishment control device in some embodiments of this application.

[0037] The parts referred to by the numbers in the attached diagram are as follows: 10. Brake circuit; 11. Branch circuit; 12. First check valve; 110. Oil reservoir; 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. Reservoir; 230. Second check valve; 240. Pressure sensor; 250. Third solenoid valve; 260. Fourth solenoid valve. Detailed Implementation

[0038] This application will be described in detail with reference to the accompanying drawings and embodiments. The embodiments are merely illustrative and not intended to limit the scope of this application.

[0039] Firstly, as shown in Figures 1-2, this embodiment provides a brake system fluid replenishment control method, applicable to situations where the braking force generated by the vehicle's brake system cannot meet the vehicle's braking needs due to heat fade, and applicable to situations where, in the absence of heat fade, the initial pressure build-up cannot meet the vehicle's braking needs due to the allocation of the vehicle's brake system's operating modes. Specifically, a complete vehicle brake system is used as an example; this brake system includes a reservoir 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. The pedal 120 and master cylinder 130 constitute a mechanical pressure build-up module, the main motor 140 and piston chamber 150 constitute a main pressure build-up module, and the redundant motor 160 and pump body 170 constitute a redundant pressure build-up module. The mechanical pressure build-up module and the main pressure build-up module are connected in parallel between the reservoir 110 and the redundant pressure build-up module. The redundant pressure build-up module is further connected to the vehicle wheel end 180 to form a complete brake circuit 10. It should be noted that the braking circuit 10 includes a branch line 11, on which the main pressure-building module is located. 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 check valve 12 is provided on the branch line 11. Based on the setting of the first check valve 12, the oil in the oil reservoir 110 can be input to the main pressure-building module through the branch line 11, while the oil in the braking circuit 10 and the main pressure-building module cannot be returned to the oil reservoir 110 through the branch line 11.

[0040] Based on the above vehicle braking system, a braking system fluid replenishment control method in this embodiment includes: step S1, obtaining the hydraulic pressure value of the brake fluid in the brake circuit 10 after the pressure building module has built up pressure.

[0041] The pressure-building module proposed here includes the aforementioned 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 operates to build pressure, causing the oil drawn from the oil reservoir 110 to enter the brake circuit 10 as brake fluid. During this process, due to heat fade, the hydraulic pressure in the brake circuit 10 is less than the actual hydraulic pressure generated by the pressure-building module. The actual hydraulic pressure value of the brake fluid in the brake circuit 10 is obtained through certain measurement methods.

[0042] Step S2: Determine whether the hydraulic pressure value has reached the hydraulic threshold required for vehicle braking.

[0043] The hydraulic pressure threshold required for vehicle braking is not fixed; it varies depending on the specific vehicle driving conditions and external environment. The optimal hydraulic pressure threshold represents the current braking requirement of the vehicle. In step S2, the hydraulic pressure value obtained in step S1 is compared with the hydraulic pressure threshold required for vehicle braking to determine whether the current hydraulic pressure value can meet the vehicle braking requirements. For example, after the pressure build-up module builds up pressure once, the actual hydraulic pressure value in the braking circuit 10 under thermal fade conditions is 100 bar, while the current vehicle braking requirement is 180 bar. In this case, the hydraulic pressure in the braking circuit 10 cannot meet the vehicle braking requirements. However, if the current vehicle braking requirement is 100 bar, then the hydraulic pressure in the braking circuit 10 can meet the vehicle braking requirements.

[0044] 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 up pressure again.

[0045] Taking the example that the actual hydraulic pressure in the braking circuit 10 under heat fade conditions is 100 bar, while the current vehicle braking requires a hydraulic pressure of 180 bar, similarly, if the initial pressure build-up by the braking system in the absence of heat fade results in a hydraulic pressure of 100 bar in the braking circuit 10, the brake fluid in the braking circuit 10 will not meet the vehicle's braking requirements. In step S3, the existing brake fluid in the braking circuit 10 is stored in the braking circuit 10, i.e., pressure is maintained. The vehicle's braking system controls the pressure build-up module to build up pressure again, causing at least one of the mechanical pressure build-up module, the main pressure build-up module, and the redundant pressure build-up module to operate. This allows the brake fluid in the reservoir 110 to be drawn again and introduced into the braking circuit 10. The brake fluid entering the braking circuit 10 this time mixes and overlaps with the brake fluid being maintained, thereby increasing the hydraulic pressure in the braking circuit 10 to meet the vehicle's braking requirements. It should be noted that when the pressure-building module builds up pressure again to form a hydraulic pressure of at least 80 bar, the sum of this pressure and the 100 bar pressure held is not less than 180 bar. At this point, the brake line 10 has brake fluid with sufficient hydraulic pressure to better meet the vehicle's braking needs. When the brake fluid pressure formed by the pressure-building module after building up pressure again is less than 80 bar, the sum of this pressure and the 100 bar pressure held is less than 180 bar. At this point, the brake fluid in the brake line 10 still cannot meet the vehicle's braking needs. In this case, the mixed and superimposed brake fluid is held up pressure again in the brake line 10, and the vehicle's braking system controls the pressure-building module to build up pressure again until the brake fluid in the brake line 10 has a hydraulic pressure of at least 180 bar to meet the vehicle's braking needs.

[0046] In some embodiments, the braking circuit 10 has a first solenoid valve 190. Specifically, the mechanical pressure building module and the main pressure building module are connected in parallel between the oil reservoir 110 and the first solenoid valve 190, while the redundant pressure building module is connected to the first solenoid valve 190 and the vehicle wheel end 180 respectively.

[0047] In step S3 above, when the hydraulic pressure value does not reach the hydraulic threshold, the brake fluid is stored in the brake line 10. Specifically, the brake system controls the first solenoid valve 190 to close.

[0048] After the mechanical pressure-building module, main pressure-building module, and redundant pressure-building module draw oil from the oil reservoir 110 and introduce it into the brake circuit 10, the brake fluid can flow towards the vehicle wheel end 180, allowing it to flow between the first solenoid valve 190 and the vehicle wheel end 180. When the first solenoid valve 190 is closed, it can disconnect the brake circuit 10, allowing the brake fluid to be stored between the first solenoid valve 190 and the vehicle wheel end 180, achieving a pressure-holding effect. Subsequently, the vehicle's braking system can control the pressure-building module to build up pressure again until the brake fluid in the brake circuit 10 can meet the vehicle's braking requirements.

[0049] The function of the first solenoid valve 190 here is not simply to store brake fluid between the first solenoid valve 190 and the vehicle wheel end 180. Understandably, when the first solenoid valve 190 is closed, the brake line 10 is disconnected. This prevents brake fluid from flowing back into the reservoir 110, thus maintaining pressure. It also prevents brake fluid from flowing back into the brake line 10 when the pressure-building module draws fluid again, thus avoiding affecting the pressure-building effect. For example, if the pressure built up by the main pressure-building module fails to meet the vehicle's braking requirements, the main pressure-building module will perform a back-pull action to draw fluid to fill the piston chamber 150. At this time, the first solenoid valve 190 is closed, so the main pressure-building module can only draw fluid from the reservoir 110 through the mechanical pressure-building module and / or the branch line 11. Without the first solenoid valve 190, the main pressure-building module would also draw the existing brake fluid from the brake line 10, causing the original brake fluid in the brake line 10 to be lost, thus reducing or eliminating the pressure-building effect of the main pressure-building module.

[0050] In some embodiments, a second solenoid valve 210 is provided in the braking circuit 10, which is arranged in parallel with the first solenoid valve 190 in the braking circuit 10.

[0051] In step S3 above, 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 up pressure again. Specifically, the braking system controls the first solenoid valve 190 to close and controls the second solenoid valve 210 to open.

[0052] If the hydraulic pressure value does not reach the hydraulic threshold after the pressure-building module has built up pressure, it controls the first solenoid valve 190 to close, storing the brake fluid between the first solenoid valve 190 and the vehicle wheel end 180. Simultaneously, it controls the second solenoid valve 210 to open, allowing the brake fluid drawn from the reservoir 110 to be delivered through the second solenoid valve 210 to the area between the first solenoid valve 190 and the vehicle wheel end 180 when the pressure-building module builds up pressure again. This allows the brake fluid to mix and combine with the brake fluid in the pressure-holding area, thereby increasing the hydraulic pressure and meeting the vehicle's braking requirements. Furthermore, the second solenoid valve 210 can also function as a one-way valve. When the second solenoid valve 210 is open, it only allows brake fluid to flow into the area between the first solenoid valve 190 and the vehicle wheel end 180, preventing the brake fluid between the first solenoid valve 190 and the vehicle wheel end 180 from flowing back to the reservoir 110, thus ensuring a better effect for re-building pressure.

[0053] In some embodiments, the brake circuit 10 has a reservoir 220 disposed between the second solenoid valve 210 and the vehicle wheel end 180. The reservoir 220 is provided to cope with more extreme vehicle conditions. Specifically, there is a situation where the pressure build-up module draws oil from the oil reservoir 110 as brake fluid and outputs it to the vehicle wheel end 180, and then discharges the brake fluid into the reservoir 220 after the vehicle brakes.

[0054] In step S3 above, 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 up pressure again. The braking system controls the first solenoid valve 190 to close. The redundant pressure building module can draw oil from the reservoir 220 as brake fluid and input it between the first solenoid valve 190 and the vehicle wheel end 180.

[0055] At this time, the second solenoid valve 210 can be in an open or closed state. The pressure building module builds pressure again through the redundant pressure building module. The redundant motor 160 drives the pump body 170 to draw oil from the reservoir 220, so that the oil in the reservoir 220 is used as brake fluid and input to the space between the first solenoid valve 190 and the vehicle wheel end 180, thereby increasing the brake fluid in the overall braking circuit 10, and thus meeting the vehicle braking requirements.

[0056] The reservoir 220 is connected to the pump body 170 via a second check valve 230. The second check valve 230 allows the oil in the brake circuit 10 to flow into the reservoir 220. At the same time, when the pump body 170 applies an outward pumping force to the second check valve 230, the second check valve 230 also allows the oil in the reservoir 220 to flow out into the brake circuit 10.

[0057] In some embodiments, a pressure sensor 240 is provided in the braking line 10.

[0058] In step S1 above, at least one of the mechanical pressure building module, the main pressure building module, and the redundant pressure building module operates to build pressure, so that the oil in the oil reservoir 110 is used as brake fluid and enters the brake circuit 10. During this process, due to heat fade, the hydraulic pressure in the brake circuit 10 is less than the actual hydraulic pressure generated by the pressure building module. The pressure sensor 240 can better obtain the actual hydraulic pressure value of the brake fluid in the brake circuit 10 and achieve the effect of real-time monitoring.

[0059] In step S2 above, the vehicle's braking system obtains the hydraulic pressure value detected by the pressure sensor 240 and determines whether to perform a pressure holding action and rebuild pressure.

[0060] Of course, in this embodiment, the hydraulic pressure value in the brake circuit 10 is detected by the pressure sensor 240. In fact, other methods can also be used, such as detecting the temperature of the brake disc, as long as the corresponding technical effect and advantages can be achieved.

[0061] To further illustrate the brake system fluid replenishment control method in this embodiment, the following description is based on a specific example. 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. The third solenoid valve 250 is located on the side of the master cylinder 130 away from the reservoir 110, and the piston chamber 150 is connected to the branch line 11 through the fourth solenoid valve 260.

[0062] Taking pressure building via the main pressure building module as an example, the first solenoid valve 190 and the fourth solenoid valve 260 are energized and open, while the second solenoid valve 210 and the third solenoid valve 250 are de-energized and closed. The main motor 140 and the piston chamber 150 draw oil from the oil reservoir 110 through the fourth solenoid valve 260 and the branch line 11. At this time, the driver presses the pedal 120, causing the main motor 140 to control the piston in the piston chamber 150 to push the oil into the brake line 10 as brake fluid. The brake fluid in the brake line 10 enters the first solenoid valve 190 and the vehicle through the first solenoid valve 190. 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 obtain the real-time hydraulic pressure value. After the vehicle's braking system obtains the hydraulic pressure value, it compares it with the hydraulic pressure 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 requirements. For example, if the hydraulic pressure value detected by the pressure sensor 240 is 100 bar, while the current vehicle braking requires a hydraulic pressure of 180 bar, in this case, the brake fluid in the brake circuit 10 cannot meet the current vehicle braking requirements.

[0063] Based on the above, the vehicle's braking system controls the first solenoid valve 190 to close, thus preserving the brake fluid in the brake line 10 after pressure build-up. In other words, the brake fluid is pressurized between the first solenoid valve 190 and the vehicle wheel end 180, and the second solenoid valve 210 is controlled to open.

[0064] There are several ways to rebuild the pressure:

[0065] The first method, as shown in Figures 4 and 7, involves the main motor 140 driving the piston in the piston chamber 150 to pull back the oil from the oil reservoir 110 and push the oil out of the piston chamber 150 again to build up pressure. This allows the oil in the piston chamber 150 to be output as brake fluid to the brake circuit 10. The brake fluid formed by the second pressure build-up is then input through the second solenoid valve 210 between the first solenoid valve 190 and the vehicle wheel end 180 and mixed with the pressure-maintaining brake fluid. The brake fluid formed by the second pressure build-up is also detected by the pressure sensor 240. If the hydraulic pressure of the brake fluid formed by the second pressure build-up is less than 80 bar, a third pressure build-up is required until the vehicle's braking needs are met.

[0066] The second method, as shown in Figures 3 and 6, involves the redundant motor 160 and pump 170 drawing oil from the reservoir 110 to build pressure after the first solenoid valve 190 is closed. The pump 170 then pumps the drawn oil as brake fluid between the first solenoid valve 190 and the vehicle wheel end 180, where it mixes with the pressure-maintaining brake fluid. The brake fluid formed by the re-pressurization is also detected by the pressure sensor 240. If the hydraulic pressure of the brake fluid formed by the re-pressurization is less than 80 bar, a third pressurization is required until the vehicle's braking needs are met.

[0067] The third method, as shown in Figure 6, involves the redundant motor 160 and pump 170 drawing oil from the reservoir 220 as brake fluid to build up pressure after the first solenoid valve 190 is closed. The pump 170 draws the oil from the reservoir 220 as brake fluid between the first solenoid valve 190 and the vehicle wheel end 180, mixing it with the pressure-maintaining brake fluid. The brake fluid formed by the re-pressurization is also detected by the pressure sensor 240. If the hydraulic pressure of the brake fluid formed by the re-pressurization is less than 80 bar, a third pressurization is required until the vehicle's braking needs are met.

[0068] Fourthly, after the first solenoid valve 190 is closed, the third solenoid valve 250 is opened. The mechanical pressure building module builds pressure by drawing oil from the oil reservoir 110. The oil in the oil reservoir 110 is used as brake fluid and is input as brake fluid through the second solenoid valve 210 between the first solenoid valve 190 and the vehicle wheel end 180, where it is mixed with the pressure-maintaining brake fluid. The brake fluid formed by the re-pressurization is also detected by the pressure sensor 240. If the hydraulic pressure of the brake fluid formed by the re-pressurization is less than 80 bar, a third pressurization is required until the vehicle's braking needs are met.

[0069] Furthermore, in the second, third, and fourth methods described above, after the first solenoid valve 190 is closed, pressure is re-established through the redundant pressure-building module and / or the mechanical pressure-building module. During this process, since the fourth solenoid valve 260 is in the open state, the main motor 140 can control the piston in the piston chamber 150 to pull back and extract the oil from the oil reservoir 110, as shown in Figure 5. This has two advantages. First, the simultaneous operation of the main motor 140 and the redundant motor 160 can accelerate the flow rate of the brake fluid from the reservoir 110 into the brake circuit 10, thereby improving the braking efficiency of the vehicle under heat fade conditions. Second, it allows the piston chamber 150 to be filled with brake fluid in advance to prepare for the need for re-pressurization. As shown in Figure 8, for example, when the brake fluid pressure formed by the re-pressurization through the redundant pressurization module is less than 80 bar, a third pressurization is required. In this case, the third pressurization can be performed using the pre-prepared main pressurization module. The main pressurization module can immediately push the brake fluid out of the piston chamber 150 to pressurize, resulting in a faster response and improved braking efficiency of the vehicle under heat fade conditions.

[0070] Secondly, this embodiment provides an electronic device. The electronic device can be various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, etc. The electronic device can also be various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices.

[0071] The electronic device includes: one or more processors; and a memory storing computer program instructions, which, when executed, cause the processors to perform the steps of the methods provided in any one or more of the above embodiments. FIG9 discloses an exemplary structural diagram of the electronic device. As shown in FIG9, the electronic device includes: one or more processors 1101, a memory 1102, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components are interconnected using different buses and can be mounted on a common motherboard or otherwise mounted as needed. The processors can process instructions executed within the electronic device, including instructions stored in or on memory to display graphical information of a GUI on an external input / output device (such as a display device coupled to the interface). In some other embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple electronic devices can be connected, each providing some of the necessary operations (e.g., as a server array, a set of blade servers, or a multiprocessor system). The components, their connections and relationships, and their functions shown herein are merely examples and are not intended to limit the implementation of the present application described and / or claimed herein.

[0072] The electronic device may further include an input device 1103 and an output device 1104. The processor 1101, memory 1102, input device 1103 and output device 1104 may be connected by a bus or other means, as shown in Figure 9, which illustrates a connection via a bus.

[0073] Input device 1103 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the electronic device, such as a touch screen, keypad, mouse, trackpad, touchpad, pointer, one or more mouse buttons, trackball, joystick, etc. Output device 1104 may include a display device, auxiliary lighting device (e.g., LED), and haptic feedback device (e.g., vibration motor). The display device may include 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.

[0074] To provide interaction with the user, the electronic device can be a computer. The computer has: a display device for displaying information to the user (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor); and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0075] In this embodiment, a computer-readable medium stores a computer program / instructions that, when executed by a processor, implement the steps of the methods provided in any one or more of the above embodiments. This computer-readable medium may be included in the electronic device described in the above embodiments; or it may exist independently and not assembled into that device. The aforementioned computer-readable medium carries one or more computer-readable instructions.

[0076] The memory 1102 can serve as a non-transitory computer-readable storage medium, used to store non-transitory software programs, non-transitory computer-executable programs, and modules. The processor 1101 executes various functional applications and data processing of the server by running the non-transitory software programs, instructions, and modules stored in the memory 1102, thereby implementing the program instructions / modules corresponding to the methods provided in any one or more of the embodiments described above in this application.

[0077] The memory 1102 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the electronic device. Furthermore, the memory 1102 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 1102 may optionally include memory remotely located relative to the processor 1101, and these remote memories may be connected to the electronic device via a network. Examples of such networks include the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0078] The computer-readable medium described in this application may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. For example, a computer-readable medium may be an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CDROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0079] Computer-readable media include permanent and non-permanent, removable and non-removable media, which can store information by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Computer storage media include 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 technologies, read-only optical disc (CDROM), digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by computing devices.

[0080] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can 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 can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0081] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. For example, it can be implemented using an application-specific integrated circuit (ASIC), a general-purpose computer, or any other similar hardware device. In some embodiments, the software program of this application can be executed by a processor to implement the steps or functions described above. Similarly, the software program of this application (including related data structures) can be stored in a computer-readable recording medium, such as RAM memory, magnetic or optical drives, floppy disks, or similar devices. Additionally, some steps or functions of this application can be implemented in hardware, for example, as circuitry that works with a processor to perform the various steps or functions.

[0082] The computer program product provided in this application includes one or more computer programs / instructions. When executed by a processor, these computer programs / instructions generate, in whole or in part, the processes or functions described in this application. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk, SSD).

[0083] The flowcharts or block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of devices, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-specific system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling fluid replenishment in a braking system, comprising: Obtain the hydraulic pressure value of the brake fluid in the brake circuit after the pressure build-up module has built up pressure; Determine whether the hydraulic pressure value reaches the hydraulic threshold required for vehicle braking; When the hydraulic pressure value does not reach the hydraulic threshold, the brake fluid is stored in the brake circuit, and the pressure-building module is controlled to build up pressure again.

2. The braking system fluid replenishment control method according to claim 1 further includes: A first solenoid valve is provided, which is disposed on the brake line, and the brake fluid returns to the reservoir through the first solenoid valve; When the hydraulic pressure value does not reach the hydraulic threshold, the first solenoid valve is controlled to close to store the brake fluid in the brake circuit.

3. The braking system fluid replenishment control method according to claim 2 further includes: A second solenoid valve is provided, which is connected 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 threshold, the second solenoid valve is opened, and the pressure building module is controlled to build pressure again.

4. The braking system fluid replenishment control method according to claim 3 further includes: A redundant motor and pump body are provided, which are disposed between the second solenoid valve and the wheel end of the vehicle; the pressure building module includes a redundant pressure building module composed of the redundant motor and the pump body; When the hydraulic pressure value does not reach the hydraulic threshold, the redundant pressure building module can draw oil from the oil reservoir through the second solenoid valve to achieve pressure building again.

5. The braking system fluid replenishment control method according to claim 3 or 4, further comprising: A redundant motor, pump body, and liquid storage tank are provided between the second solenoid valve and the vehicle wheel end; the pressure building module includes a redundant pressure building module composed of the redundant motor and the pump body; If the hydraulic pressure value does not reach the hydraulic threshold, the redundant pressure building module can draw oil from the storage tank to achieve pressure building again.

6. The braking system fluid replenishment control method according to claim 4, wherein, The pressure building module also includes 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 up of the pressure building module is achieved through the operation of at least one of the main pressure building module, the redundant pressure building module, and the mechanical pressure building module.

7. The braking system fluid replenishment control method according to claim 6 further includes: When the first solenoid valve is closed, the fourth solenoid valve is opened, and the main motor can control the piston chamber to draw oil from the oil reservoir through the first check valve and the fourth solenoid valve for repressurization of the pressure building module.

8. An electronic device, comprising: One or more processors; And a memory storing computer program instructions, which, when executed, cause the processor to perform the steps of the method as described in any one of claims 1-7.

9. A computer-readable medium storing a computer program / instructions that, when executed by a processor, implement the steps of the method according to any one of claims 1-7.

10. A computer program product comprising a computer program / instructions that, when executed by a processor, implement the steps of the method according to any one of claims 1-7.

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