Assistance vacuum tank air pressure control method and device, vehicle, storage medium and chip

Abstract

The embodiment of the invention provides a boosting vacuum tank air pressure control method and device, a vehicle, a storage medium and a chip, and the method is characterized in that the method comprises the steps: determining an atmospheric pressure value according to the information of the altitude where the vehicle is located; determining a vacuum tank target air pressure value corresponding to the atmospheric pressure value according to the atmospheric pressure value; determining a threshold value corresponding to the target air pressure value of the vacuum tank according to the target air pressure value of the vacuum tank; if the actual air pressure value of the vacuum tank is larger than the threshold value, the vacuum tank is controlled to exhaust air till the actual air pressure value of the vacuum tank is smaller than or equal to the target air pressure value of the vacuum tank. In the embodiment of the invention, the atmospheric pressure value is determined according to the altitude information of the vehicle, and then the air pressure value in the vacuum tank is adjusted based on the atmospheric pressure value, so that the vehicle can ensure better brake assisting performance under the condition that an atmospheric pressure sensor is not used; the problem of contradiction between the barometric pressure sensor and the brake assisting performance is solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and specifically to a method, device, vehicle, storage medium and chip for controlling air pressure of a power-assisted vacuum tank. Background Art

[0002] With the development of the new energy industry, competition in the new energy vehicle market is becoming increasingly fierce, and optimization and cost reduction of various systems are imminent.

[0003] The working principle of the traditional brake assist system is to connect the brake system with a vacuum tank, and reduce the pressure inside the brake system through the low air pressure in the vacuum tank to provide brake assist. In new energy vehicles, the vacuum tank is evacuated by an on-board booster vacuum pump to reduce the air pressure in the vacuum tank. Since the air pressure value that needs to be maintained in the vacuum tank is affected by the external atmospheric pressure, an atmospheric pressure sensor is required to collect the external atmospheric pressure value in real time during the above working process. For example, when the vehicle is in a plateau area, the external atmospheric pressure value collected by the atmospheric pressure sensor is low, and the vehicle's vacuum pump control system will extend the vacuum pumping time, thereby reducing the air pressure in the vacuum tank to adjust the brake assist performance.

[0004] However, it is very costly to install an atmospheric pressure sensor in a vehicle. If the atmospheric pressure sensor is eliminated to reduce the cost of the entire vehicle, the braking assistance performance will be poor.

[0005] It should be pointed out that the information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or suggestion in any form that the information constitutes prior art already known to those skilled in the art. Summary of the invention

[0006] In view of this, the present application provides a vehicle-mounted power-assist vacuum tank air pressure control method, device, vehicle, storage medium and chip, so as to solve the problem in the prior art that it is expensive to install an atmospheric pressure sensor in the vehicle. If the atmospheric pressure sensor is eliminated to reduce the cost of the entire vehicle, the braking assist performance will be poor.

[0007] In a first aspect, an embodiment of the present application provides a method for controlling air pressure of a vehicle-mounted booster vacuum tank, comprising:

[0008] Determine the atmospheric pressure value according to the altitude information of the vehicle;

[0009] According to the atmospheric pressure value, determining a corresponding target air pressure value of the vacuum tank;

[0010] A corresponding threshold is determined according to the vacuum tank; if the actual air pressure value of the vacuum tank is greater than the threshold, the vacuum tank is controlled to exhaust air until the actual air pressure value of the vacuum tank is less than or equal to the target air pressure value.

[0011] In a possible implementation, determining the atmospheric pressure value according to the altitude information of the vehicle includes:

[0012] The atmospheric pressure value is determined according to the altitude information of the vehicle and a table of relationships between altitude and atmospheric pressure.

[0013] In a possible implementation, determining, according to the atmospheric pressure value, a target pressure value of the vacuum tank corresponding to the atmospheric pressure value includes:

[0014] During the vehicle braking process, obtaining the air pressure rising rate of the vacuum tank;

[0015] The corresponding target air pressure value of the vacuum tank is obtained according to the atmospheric pressure value and the air pressure rising rate.

[0016] In a possible implementation, obtaining the corresponding target air pressure value of the vacuum tank according to the atmospheric pressure value and the air pressure rising rate includes:

[0017] Acquire an initial target air pressure value of the vacuum tank, wherein the initial target air pressure value of the vacuum tank is the difference between the atmospheric pressure value and the pressure difference value;

[0018] The target air pressure value of the vacuum tank is obtained according to the initial target air pressure value of the vacuum tank and the air pressure rising rate.

[0019] In a possible implementation, obtaining the target air pressure value of the vacuum tank according to the initial target air pressure value of the vacuum tank and the air pressure rising rate includes:

[0020] The target air pressure value of the vacuum tank is calculated according to the formula: pt=p0+a*△Pg+b, wherein pt is the target air pressure value of the vacuum tank, △Pg is the air pressure rise rate, p0 is the initial target air pressure value of the vacuum tank, and a and b are coefficients.

[0021] In a possible implementation, determining a threshold value corresponding to the target air pressure value of the vacuum tank according to the target air pressure value of the vacuum tank includes:

[0022] The threshold value is calculated according to the formula: threshold value=ΔP / 2+pt, wherein ΔP is the pressure difference value.

[0023] In a second aspect, an embodiment of the present application provides a vehicle-mounted booster vacuum tank air pressure control device, comprising:

[0024] An atmospheric pressure value determination module, used to determine the atmospheric pressure value according to the altitude information of the vehicle;

[0025] A vacuum tank target air pressure value determination module, used to determine a vacuum tank target air pressure value corresponding to the atmospheric pressure value according to the atmospheric pressure value;

[0026] a threshold determination module, which determines a threshold value corresponding to the target air pressure value of the vacuum tank according to the target air pressure value of the vacuum tank;

[0027] The vacuum tank control module controls the vacuum tank to exhaust air if the actual air pressure value of the vacuum tank is greater than the threshold value until the actual air pressure value of the vacuum tank is less than or equal to the target air pressure value of the vacuum tank.

[0028] In a third aspect, an embodiment of the present application provides a vehicle, including:

[0029] one or more processors;

[0030] Memory;

[0031] Multiple applications;

[0032] and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the vehicle, cause the vehicle to perform any of the methods described in the first aspect.

[0033] In a fourth aspect, an embodiment of the present application provides a computer storage medium, comprising computer instructions, which, when executed on the vehicle, causes the vehicle to execute any one of the methods described in the first aspect.

[0034] In a fifth aspect, an embodiment of the present application provides a chip, comprising a processor and a data interface, wherein the processor reads instructions stored in a memory through the data interface to execute any one of the methods described in the first aspect.

[0035] In an embodiment of the present application, the atmospheric pressure value is determined by the altitude information of the vehicle, and then the air pressure value in the vacuum tank is adjusted based on the atmospheric pressure value. Without using an atmospheric pressure sensor, the vehicle can ensure better brake assist performance, thereby solving the contradiction between the atmospheric pressure sensor and the brake assist performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1A schematic diagram of an application scenario provided for an embodiment of the present application.

[0038] Figure 2 A flow chart of a method for controlling air pressure of a vehicle-mounted power-assisting vacuum tank provided in an embodiment of the present application.

[0039] Figure 3 A flow chart of another method for controlling the air pressure of a vehicle-mounted power-assisting vacuum tank provided in an embodiment of the present application.

[0040] Figure 4 A flow chart of another method for controlling the air pressure of a vehicle-mounted power-assisting vacuum tank provided in an embodiment of the present application.

[0041] Figure 5 A flow chart of another method for controlling the air pressure of a vehicle-mounted power-assisting vacuum tank provided in an embodiment of the present application.

[0042] Figure 6 A schematic structural diagram of a vehicle-mounted power-assisted vacuum tank air pressure control device provided in an embodiment of the present application.

[0043] Figure 7 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0045] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0046] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0047] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0048] To facilitate understanding, a specific application scenario is first exemplified below.

[0049] See also Figure 1, is a schematic diagram of an application scenario provided by an embodiment of the present application. Figure 1 As shown, a vehicle is shown in the application scenario, and the vehicle includes a vacuum pump, a vacuum tank and a brake system. The vacuum pump is used to evacuate the vacuum tank to reduce the air pressure in the vacuum tank; the vacuum tank is connected to the brake system, and the pressure inside the brake system is reduced by the low air pressure in the vacuum tank, thereby providing brake assistance.

[0050] It should be pointed out that Figure 1 This is only an exemplary description of the application scenarios involved in the embodiments of the present application, and should not be used as a limitation on the scope of protection of the present application. For example, the vehicles involved in the above application scenarios may be passenger cars, buses, trucks, etc., and the embodiments of the present application do not specifically limit the types of vehicles. In addition, it is understood that in addition to Figure 1 In addition to the vacuum pump, vacuum tank and brake system involved, there are other functional units or modules, which will not be described in detail in the embodiments of the present application.

[0051] In the prior art, since the air pressure value that needs to be maintained in the vacuum tank is affected by the external atmospheric pressure, an atmospheric pressure sensor is required to collect the external atmospheric pressure value in real time. However, it is costly to install an atmospheric pressure sensor in a vehicle. If the atmospheric pressure sensor is removed to reduce the cost of the entire vehicle, the braking assist performance will be poor.

[0052] In view of the above problems, the embodiment of the present application provides a method for controlling the air pressure of a vehicle-mounted booster vacuum tank, which determines the atmospheric pressure value through the altitude information of the vehicle, and then adjusts the air pressure value in the vacuum tank based on the atmospheric pressure value, so that the vehicle can ensure good brake booster performance without using an atmospheric pressure sensor, thus solving the contradiction between the atmospheric pressure sensor and the brake booster performance. This is described in detail below.

[0053] See also Figure 2 , is a flow chart of a method for controlling the air pressure of a vehicle-mounted booster vacuum tank provided in an embodiment of the present application. The method can be applied to Figure 1 The application scenarios shown are as follows: Figure 2 As shown, it mainly includes the following steps.

[0054] Step S201: Determine the atmospheric pressure value according to the altitude information of the vehicle.

[0055] Since atmospheric pressure is mainly affected by altitude (in other parts of this article, altitude may also be referred to as "altitude information") (other influencing factors include: wind speed, air density, humidity, temperature, etc.), the atmospheric pressure value can be determined by the altitude information of the vehicle. Specifically, the on-board controller installed on the vehicle will monitor the altitude information reported by the on-board map system in real time. The altitude information is used to represent the altitude of the current location of the vehicle, and the current atmospheric pressure value is determined based on the altitude information.

[0056] In a possible implementation, the vehicle controller stores an altitude-to-atmospheric pressure relationship table, which is used to characterize the mapping relationship between altitude information and atmospheric pressure. The vehicle controller monitors the altitude information of the vehicle's current position reported by the vehicle map system in real time, and then compares the acquired altitude information of the vehicle's current position with the altitude-to-atmospheric pressure relationship table to finally obtain the atmospheric pressure value.

[0057] Exemplarily, the altitude and atmospheric pressure relationship table is shown in Table 1. It can be understood that when the altitude information of the vehicle is 1500m, the vehicle controller compares the obtained altitude information with the altitude and atmospheric pressure relationship table, and can determine that the atmospheric pressure value is 96.844kPa; similarly, when the altitude information of the vehicle is 2500m, the determined atmospheric pressure value is 92.787; and so on, which will not be described in detail in the embodiment of the present application.

[0058] Table 1:

[0059] Altitude(m) Atmospheric pressure (kPa) 0 101.325 500 100.123 1000 98.667 1500 96.844 2000 94.83 2500 92.787 3000 90.519 3500 88.146 4000 85.69 4500 83.161 5000 80.575

[0060] Step S202: According to the atmospheric pressure value, determine the target pressure value of the vacuum tank corresponding to the atmospheric pressure value.

[0061] In the embodiment of the present application, the target pressure value of the vacuum tank can be understood as the corresponding pressure value when the vacuum tank can provide normal brake boost to the brake system. It can be understood that as the vacuum tank provides brake boost to the brake system, the pressure value in the vacuum tank gradually increases. Therefore, the target pressure value of the vacuum tank can be understood as the minimum pressure value in the vacuum tank.

[0062] Generally, the target air pressure value of the vacuum tank is related to the external atmospheric pressure value. Therefore, it is necessary to determine the target air pressure value of the vacuum tank corresponding to the atmospheric pressure value according to the atmospheric pressure value.

[0063] Step S203: Determine a threshold value corresponding to the target air pressure value of the vacuum tank according to the target air pressure value of the vacuum tank.

[0064] In the embodiment of the present application, the threshold corresponding to the target air pressure value of the vacuum tank can be understood as: the corresponding air pressure value when the vacuum tank is no longer able to or will no longer be able to provide normal brake assistance to the brake system. It can be understood that in order for the vacuum tank to provide normal brake assistance to the brake system, the air pressure value in the vacuum tank needs to be maintained between the "target air pressure value of the vacuum tank" and the "threshold corresponding to the target air pressure value of the vacuum tank". The specific determination process of the threshold corresponding to the target air pressure value of the vacuum tank is described in detail below.

[0065] Step S204: If the actual air pressure value of the vacuum tank is greater than the threshold value, the vacuum tank is controlled to exhaust air until the actual air pressure value of the vacuum tank is less than or equal to the target air pressure value of the vacuum tank.

[0066] In an embodiment of the present application, if the actual air pressure value of the vacuum tank is greater than a threshold value, the vacuum tank is controlled to discharge air until the actual air pressure value of the vacuum tank is less than or equal to the target air pressure value of the vacuum tank, so that the air pressure value in the vacuum tank is always maintained between the target air pressure value of the vacuum tank and the threshold value, so that the vacuum tank can provide normal braking assistance for the braking system.

[0067] In an embodiment of the present application, the atmospheric pressure value is determined by the altitude information of the vehicle, and then the air pressure value in the vacuum tank is adjusted based on the atmospheric pressure value. Without using an atmospheric pressure sensor, the vehicle can ensure better brake assist performance, thereby solving the contradiction between the atmospheric pressure sensor and the brake assist performance.

[0068] See also Figure 3 , is a flow chart of another vehicle-mounted booster vacuum tank air pressure control method provided in an embodiment of the present application. Figure 3 As shown, this method Figure 2 On the basis of, step S202 specifically includes the following steps.

[0069] Step S2021: During the vehicle braking process, the air pressure rising rate of the vacuum tank is obtained.

[0070] In addition to being affected by altitude information, the atmospheric pressure value may also be affected by other factors, such as wind speed, air density, humidity, temperature, etc. The target pressure value of the vacuum tank determined by the atmospheric pressure value has a certain error, which can be corrected by the pressure rise rate of the vacuum tank.

[0071] In a possible implementation, during the vehicle braking process, the increase in the actual air pressure value of the vacuum tank is detected, and the air pressure increase rate can be obtained. It should be noted that during the vehicle braking process, the vacuum pump does not work, that is, the vacuum pump does not inflate or deflate the vacuum tank.

[0072] Specifically, in the embodiment of the present application, the calculation formula for the air pressure rise rate is: air pressure rise rate = (air pressure value collected in this period - air pressure value collected in the previous period) / sampling period. The sampling period can be adjusted according to the specific performance of the vehicle, for example, 0.01s. The air pressure rise rate is affected by many factors. In addition to altitude information, it is also affected by factors such as wind speed, air density, humidity, and temperature.

[0073] At the same time, it is worth noting that if the pressure rise rate is relatively large, it means that the outside atmospheric pressure value is greater than the estimated atmospheric pressure value at the same altitude, and the target pressure value of the vacuum tank can be appropriately increased. If the pressure rise rate is relatively small, it means that the outside atmospheric pressure value is smaller than the estimated atmospheric pressure value, and the target pressure value of the vacuum tank can be appropriately reduced. The ultimate function is to keep the difference between the actual pressure value of the vacuum tank and the outside atmospheric pressure value fixed.

[0074] Step S2022: Determine the target air pressure value of the vacuum tank corresponding to the atmospheric pressure value according to the atmospheric pressure value and the air pressure rising rate.

[0075] In an embodiment of the present application, the braking process of the vehicle is utilized to obtain the air pressure rising rate of the vacuum tank, and then the target air pressure value of the vacuum tank is adjusted based on the air pressure rising rate of the vacuum tank and the atmospheric pressure value, so that the target air pressure value of the vacuum tank is more accurate.

[0076] See also Figure 4 , is a flow chart of another vehicle-mounted booster vacuum tank air pressure control method provided in an embodiment of the present application. Figure 4 As shown, this method Figure 3 On the basis of, step S2022 specifically includes the following steps.

[0077] Step S20221: Obtain an initial target air pressure value of the vacuum tank, where the initial target air pressure value of the vacuum tank is the difference between the atmospheric pressure value and the pressure difference value.

[0078] In a possible implementation, if the vacuum tank can provide normal brake assist for the brake system, the internal air pressure of the vacuum tank and the external atmospheric pressure will maintain a certain air pressure difference range (expressed in this article using the pressure difference value), so the initial target air pressure of the vacuum tank is the difference between the atmospheric pressure value and the pressure difference value. In a possible implementation, the pressure difference value can be regarded as a fixed value. For example, in this embodiment, this fixed value can be the difference between the standard atmospheric pressure and the air pressure in the vacuum tank when the vacuum pump is not working under standard atmospheric pressure and the air pressure in the vacuum tank can provide brake assist for stepping on the brake pedal with both feet.

[0079] Step S20222: Determine the target air pressure value of the vacuum tank corresponding to the atmospheric pressure value according to the initial target air pressure value of the vacuum tank and the air pressure rising rate.

[0080] In one possible implementation, the target air pressure value of the vacuum tank can be obtained according to the initial target air pressure value of the vacuum tank and the air pressure rising rate, and the formula is as follows: pt=p0+a*△Pg+b, wherein pt is the target air pressure value of the vacuum tank, △Pg is the air pressure rising rate, p0 is the initial target air pressure value of the vacuum tank, and a and b are coefficients.

[0081] Specifically, in this embodiment, the target pressure value of the vacuum tank can be corrected by using the pressure rise rate based on the initial target pressure value of the vacuum tank. (In the correction formula, a and b are only related to the rate of change of the pressure value, and the values ​​of a and b can be obtained through some experiments)

[0082] In a possible implementation, a corresponding threshold value can be obtained according to the target air pressure value of the vacuum tank and the pressure difference value. Specifically, the formula is: threshold value = △P / 2+pt, where △P is the pressure difference value.

[0083] For ease of understanding, the vehicle-mounted power-assisted vacuum tank air pressure control method provided in an embodiment of the present application is described in detail below in conjunction with a specific implementation method.

[0084] See also Figure 5 , is a flow chart of another vehicle-mounted booster vacuum tank air pressure control method provided in an embodiment of the present application. This method can be applied to Figure 1 The application scenarios shown are as follows: Figure 5 As shown, it mainly includes the following steps.

[0085] Step S501: the vehicle controller monitors in real time the altitude information H of the vehicle's current position reported by the vehicle map system;

[0086] Step S502: Estimate the atmospheric pressure value P by looking up the table according to the altitude information H;

[0087] Step S503: Calculate the initial target pressure value P0 of the vacuum tank according to the atmospheric pressure value;

[0088] Step S504: Correcting the initial target air pressure value of the vacuum tank according to the air pressure rising rate in the vacuum tank to obtain the target air pressure value Pt of the vacuum tank;

[0089] Step S505: the vehicle-mounted controller monitors the actual air pressure value Pv of the vacuum tank in real time;

[0090] Step S506: judge whether Pv>Pt+△P / 2. If the result is yes, execute step S507; if the result is no, execute step S509;

[0091] Step S507: The vehicle-mounted controller controls the vacuum pump to discharge the air in the vacuum tank;

[0092] Step S508: If Pv < Pt, that is, if the actual air pressure value Pv of the vacuum tank is less than the target air pressure value Pt of the vacuum tank, then execute Step S509; otherwise, execute Step S507.

[0093] Step S509: The vehicle-mounted controller controls the vacuum pump to stop working.

[0094] It can be understood that in subsequent steps, when the actual air pressure value Pv of the vacuum tank changes, according to this process schematic diagram, the vehicle-mounted controller and the vacuum pump will perform corresponding operations. In addition, for the specific content involved in the embodiments of this application, reference can be made to the descriptions in the above Figure 2 , Figure 3 and Figure 4 illustrated embodiments. For the sake of brevity of description, it will not be elaborated here.

[0095] Corresponding to the above embodiments, the embodiments of this application also provide a vehicle-mounted assisted vacuum tank air pressure control device.

[0096] See Figure 6 , which is a schematic structural diagram of a vehicle-mounted assisted vacuum tank air pressure control device provided by the embodiments of this application. As Figure 6 shown, it mainly includes the following modules.

[0097] An atmospheric pressure value determination module 601, configured to determine the atmospheric pressure value according to the altitude information of the vehicle; a vacuum tank target air pressure value determination module 602, configured to determine the target air pressure value of the vacuum tank corresponding to the atmospheric pressure value according to the atmospheric pressure value; a threshold determination module 603, configured to determine the threshold corresponding to the target air pressure value of the vacuum tank according to the target air pressure value of the vacuum tank; a vacuum tank control module 604, if the actual air pressure value of the vacuum tank is greater than the threshold, controls the vacuum tank to discharge air until the actual air pressure value of the vacuum tank is less than or equal to the target air pressure value of the vacuum tank.

[0098] For the specific content involved in the embodiments of this application, reference can be made to the descriptions in the above method embodiments. For the sake of brevity of description, it will not be elaborated here.

[0099] Corresponding to the above embodiments, the embodiments of this application also provide a vehicle. See Figure 7 , which is a schematic structural diagram of a vehicle provided by the embodiments of this application. As Figure 7 shown, the vehicle 700 may include: a processor 701, a memory 702, and a communication unit 703. These components communicate through one or more buses. Those skilled in the art can understand that the structure of the electronic device shown in the figure does not constitute a limitation to the embodiments of this application. It can be a bus structure, a star structure, and may also include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0100] The communication unit 703 is used to establish a communication channel so that the vehicle 700 can communicate with other devices.

[0101] The processor 701 is the control center of the vehicle. It uses various interfaces and lines to connect various parts of the entire vehicle. It runs or executes software programs and / or modules stored in the memory 702, and calls data stored in the memory to perform various functions of the vehicle and / or process data. The processor can be composed of an integrated circuit (IC), for example, it can be composed of a single packaged IC, or it can be composed of multiple packaged ICs with the same or different functions. For example, the processor 701 can only include a central processing unit (CPU). In the embodiment of the present application, the CPU can be a single computing core or multiple computing cores.

[0102] The memory 702 is used to store the execution instructions of the processor 701. The memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0103] When the execution instructions in the memory 702 are executed by the processor 701 , the vehicle 700 is enabled to execute part or all of the steps in the above method embodiments.

[0104] It should be pointed out that the vehicle described in this embodiment refers to a vehicle-mounted electronic device.

[0105] Corresponding to the above embodiment, the embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium may store a program, wherein when the program is running, the device where the computer-readable storage medium is located may be controlled to perform some or all of the steps in the above method embodiment. In a specific implementation, the computer-readable storage medium may be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM).

[0106] Corresponding to the above-mentioned embodiments, an embodiment of the present application further provides a chip, wherein the chip includes a processor and a data interface, and the processor reads instructions stored in the memory through the data interface to execute part or all of the steps in the above-mentioned method embodiments.

[0107] In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0108] Those of ordinary skill in the art will appreciate that the various units and algorithm steps described in the embodiments disclosed herein can be implemented in a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0109] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0110] In several embodiments provided in the present application, any function can be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as an independent product. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., and other media that can store program codes.

[0111] The above is only a specific implementation of the present application. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. The protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for controlling the air pressure of a vehicle-mounted booster vacuum tank, characterized in that: include: Determine the atmospheric pressure value according to the altitude information of the vehicle; According to the atmospheric pressure value, determining a target air pressure value of the vacuum tank corresponding to the atmospheric pressure value; According to the vacuum tank target air pressure value, determining a threshold value corresponding to the vacuum tank target air pressure value; If the actual air pressure value of the vacuum tank is greater than the threshold value, the vacuum tank is controlled to exhaust air until the actual air pressure value of the vacuum tank is less than or equal to the target air pressure value of the vacuum tank.

2. The vehicle-mounted booster vacuum tank air pressure control method according to claim 1, characterized in that: Determining the atmospheric pressure value according to the altitude information of the vehicle includes: The atmospheric pressure value is determined according to the altitude information of the vehicle and a table of relationships between altitude and atmospheric pressure.

3. The vehicle-mounted booster vacuum tank air pressure control method according to claim 1, characterized in that: The step of determining a target pressure value of the vacuum tank corresponding to the atmospheric pressure value according to the atmospheric pressure value comprises: During the vehicle braking process, obtaining the air pressure rising rate of the vacuum tank; The corresponding target air pressure value of the vacuum tank is obtained according to the atmospheric pressure value and the air pressure rising rate.

4. The vehicle-mounted booster vacuum tank air pressure control method according to claim 3, characterized in that: The step of obtaining the corresponding target air pressure value of the vacuum tank according to the atmospheric pressure value and the air pressure rising rate comprises: Acquire an initial target air pressure value of the vacuum tank, wherein the initial target air pressure value of the vacuum tank is the difference between the atmospheric pressure value and the pressure difference value; The target air pressure value of the vacuum tank is obtained according to the initial target air pressure value of the vacuum tank and the air pressure rising rate.

5. The vehicle-mounted booster vacuum tank air pressure control method according to claim 4, characterized in that: The step of obtaining the target air pressure value of the vacuum tank according to the initial target air pressure value of the vacuum tank and the air pressure rising rate comprises: The target air pressure value of the vacuum tank is calculated according to the formula: pt=p0+a*△Pg+b; Among them, pt is the target air pressure value of the vacuum tank, △Pg is the air pressure rising rate, p0 is the initial target air pressure value of the vacuum tank, and a and b are coefficients.

6. The vehicle-mounted booster vacuum tank air pressure control method according to claim 5, characterized in that: The step of determining a threshold value corresponding to the target air pressure value of the vacuum tank according to the target air pressure value of the vacuum tank includes: The threshold is calculated according to the formula: threshold = △P / 2 + pt; Among them, △P is the pressure difference value.

7. A vehicle-mounted booster vacuum tank air pressure control device, characterized in that: include: An atmospheric pressure value determination module, used to determine the atmospheric pressure value according to the altitude information of the vehicle; A vacuum tank target air pressure value determination module, used to determine a vacuum tank target air pressure value corresponding to the atmospheric pressure value according to the atmospheric pressure value; a threshold determination module, which determines a threshold value corresponding to the target air pressure value of the vacuum tank according to the target air pressure value of the vacuum tank; The vacuum tank control module controls the vacuum tank to exhaust air if the actual air pressure value of the vacuum tank is greater than the threshold value until the actual air pressure value of the vacuum tank is less than or equal to the target air pressure value of the vacuum tank.

8. A vehicle, characterized in that: include: one or more processors; Memory; Multiple applications; and one or more computer programs, wherein the one or more computer programs are stored in the memory, the one or more computer programs comprising instructions which, when executed by the vehicle, cause the vehicle to perform the method as claimed in any one of claims 1 to 6.

9. A computer storage medium, characterized in that: The method comprises computer instructions which, when executed on the vehicle, cause the vehicle to execute the method according to any one of claims 1 to 6.

10. A chip, characterized in that: The chip includes a processor and a data interface, and the processor reads instructions stored in a memory through the data interface to execute the method according to any one of claims 1 to 6.

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