Braking energy control method and vehicle control unit

Abstract

The invention provides a braking energy control method and a vehicle control unit, and the method comprises the steps: controlling an air duct to be opened under the condition that the maximum value of the braking energy of each tire of a vehicle is located in a B region; under the condition that the maximum value is located in the C area, the vehicle speed is controlled to be reduced; under the condition that the maximum value is located in the D area or the E area, an air duct is controlled to be opened, the vehicle speed is controlled to be reduced, and auxiliary braking is started; the area B meets the conditions that the tire pressure is smaller than the warning tire pressure and the braking temperature is larger than the braking warning temperature and smaller than the braking limiting temperature; the area C meets the conditions that the tire pressure is larger than the warning tire pressure and smaller than the limit tire pressure, and the braking temperature is smaller than the braking warning temperature; the area D meets the conditions that the tire pressure is larger than the warning tire pressure and smaller than the limit tire pressure, and the braking temperature is larger than the braking warning temperature and smaller than the braking limit temperature; and the E zone satisfies that the braking temperature is greater than the braking limit temperature or the tire pressure is greater than the limit tire pressure. The problems that the service life of a brake is shortened, and safety accidents of brake failure and tire burst caused by heat fade can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a brake energy control method and a vehicle controller. BACKGROUND

[0002] The prior art solution is only to automatically put the gear of the vehicle transmission into a low gear when the temperature of the brake element of the brake is too high, to limit the vehicle speed by using engine reverse traction, to avoid the brake element from being disabled due to the temperature being too high. However, this solution only uses the single means of engine reverse traction to limit the vehicle speed, and does not handle different working conditions, so the effect of reducing brake overheating is poor, which may lead to reduced service life of the brake, and even safety accidents of brake failure and tire burst caused by brake overheating due to overloading, uneven front and rear load, and unreliable quality of parts. SUMMARY

[0003] Therefore, it is necessary to provide a brake energy control method and a vehicle controller to solve the technical problems of reduced service life of the brake, and safety accidents of brake failure and tire burst caused by heat recession.

[0004] To solve the above problems, in a first aspect, the present application provides a brake energy control method, comprising: controlling the air duct to be opened when the maximum value of the brake energy of each tire of the vehicle is located in a B zone; controlling the vehicle to reduce the vehicle speed when the maximum value of the brake energy of each tire of the vehicle is located in a C zone; controlling the air duct to be opened, controlling the vehicle to reduce the vehicle speed, and starting auxiliary braking when the maximum value of the brake energy of each tire of the vehicle is located in a D zone or an E zone; wherein the B zone satisfies that the tire pressure is less than a warning tire pressure, and the brake temperature is greater than a brake warning temperature and less than a brake limit temperature; the C zone satisfies that the tire pressure is greater than the warning tire pressure and less than a limit tire pressure, and the brake temperature is less than the brake warning temperature; the D zone satisfies that the tire pressure is greater than the warning tire pressure and less than the limit tire pressure, and the brake temperature is greater than the brake warning temperature and less than the brake limit temperature; and the E zone satisfies that the brake temperature is greater than the brake limit temperature or the tire pressure is greater than the limit tire pressure.

[0005] In a possible implementation manner, the brake energy control method further comprises: controlling the vehicle to reduce the vehicle speed and starting auxiliary braking when the brake pedal stroke sensor continuously feeds back a signal within a target time length, and the brake temperature of at least one tire reaches the brake warning temperature or the tire pressure reaches the warning tire pressure.

[0006] In a possible implementation manner, the brake energy control method further comprises: In the case that the vehicle load exceeds the preset load threshold, and the brake temperature of the tire is lower than the brake warning temperature or the tire pressure is lower than the warning tire pressure, the vehicle is controlled to reduce the vehicle speed.

[0007] In a possible implementation, in the case that the vehicle load exceeds the preset load threshold, and the brake temperature of the tire is lower than the brake warning temperature or the tire pressure is lower than the warning tire pressure, the vehicle is controlled to reduce the vehicle speed, comprising: In the case that the vehicle load exceeds the preset load threshold, and the brake temperature of the tire is lower than the brake warning temperature or the tire pressure is lower than the warning tire pressure, and the vehicle is driving on a flat road, the vehicle is controlled to reduce the vehicle speed to below the first target vehicle speed.

[0008] In a possible implementation, in the case that the vehicle load exceeds the preset load threshold, and the brake temperature of the tire is lower than the brake warning temperature or the tire pressure is lower than the warning tire pressure, the vehicle is controlled to reduce the vehicle speed, and further comprising: In the case that the vehicle load exceeds the preset load threshold, and the brake temperature of the tire is lower than the brake warning temperature or the tire pressure is lower than the warning tire pressure, and the vehicle is driving on a downhill road, the vehicle is controlled to reduce the vehicle speed to below the second target vehicle speed, and the auxiliary brake is started; Wherein, the second target vehicle speed is less than the first target vehicle speed.

[0009] In a possible implementation, the brake energy control method further comprises: In the case that the vehicle load exceeds the preset load threshold, and the brake temperature of at least one tire reaches the brake warning temperature or the tire pressure reaches the warning tire pressure, the vehicle is controlled to reduce the vehicle speed, and the auxiliary brake is started.

[0010] In a possible implementation, the brake energy control method further comprises: In the case that the maximum value of the brake energy of each tire of the vehicle is located in the B zone, after the air duct is continuously controlled to be opened twice, and the maximum value of the brake energy of each tire of the vehicle is still located in the B zone, the auxiliary brake is started.

[0011] In a possible implementation, the brake energy control method further comprises: In the case that the brake temperature difference between the left and right tires of the vehicle is greater than the preset temperature difference threshold, and the brake temperature ratio of the left and right tires of the vehicle exceeds the preset first temperature ratio range, a first brake temperature warning is issued; wherein, the first temperature ratio range is obtained based on the left and right load ratio of the left and right tires of the vehicle with floating setting values up and down.

[0012] In a possible implementation, the brake energy control method further comprises: In the case that the ratio of the average brake temperatures of the front and rear axles exceeds the preset second temperature ratio range, a second brake temperature warning is issued. The second temperature ratio range is obtained based on the actual braking force ratio of the front and rear axles and the upper and lower floating set values.

[0013] In a second aspect, the application further provides a vehicle controller, comprising a memory and a processor, wherein, The memory is configured to store a program. The processor is coupled to the memory and configured to execute the program stored in the memory to implement the steps of the brake energy control method according to any one of the preceding aspects.

[0014] The brake energy control method and the vehicle controller provided by the application can reduce brake overheating in different ways according to the maximum brake energy of each tire of the vehicle, which is located in the B zone, the C zone, the D zone or the E zone. The B zone, the C zone, the D zone and the E zone are divided according to the warning tire pressure, the limit tire pressure, the brake warning temperature and the limit temperature. If it is necessary to slightly reduce brake overheating, the air duct can be opened. If it is necessary to further reduce brake overheating, the vehicle speed can be reduced. In a more serious case, the air duct is controlled to be opened, the vehicle speed is controlled to be reduced, and auxiliary braking is started. The application can control the vehicle in stages and achieve good effect in reducing brake overheating, avoid reducing the service life of the brake, and solve the technical problems of brake failure and safety accidents caused by tire burst due to heat recession caused by the existing solutions. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 The flow chart of one embodiment of the brake energy control method provided by the application; Figure 2 The zone division diagram for brake energy provided by the application; Figure 3 The flow chart of another embodiment of the brake energy control method provided by the application; Figure 4 The structure schematic diagram of one embodiment of the electronic device provided by the application. DETAILED DESCRIPTION

[0017] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0018] In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0019] In the embodiments of the present application, the terms "comprising" and "having" and any variations thereof are intended to cover not exclusively including, for example, a process, method, device, product or equipment comprising a series of steps or modules does not have to be limited to the clearly listed steps or modules, but can include other steps or modules that are not clearly listed or inherent to the process, method, product or equipment.

[0020] The naming or numbering of steps appearing in the embodiments of the present application does not mean that the steps in the method flow must be performed in the time / logical order indicated by the naming or numbering. The named or numbered flow steps can change the execution order according to the technical purpose to be achieved, as long as the same or similar technical effects can be achieved.

[0021] Reference to "an embodiment" in this document means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by a person skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] The present application provides a brake energy control method and a vehicle controller, which are described below respectively.

[0023] As shown in Figure 1 The present application provides a brake energy control method, which can be realized by executing an application program in a vehicle controller on a vehicle; the brake energy control method comprises: S101, in the case that the maximum value of brake energy of each tire of the vehicle is located in a B zone, controlling the air duct to be opened. As shown in Figure 2 The B zone satisfies: the tire pressure is less than the warning tire pressure, and the brake temperature is greater than the brake warning temperature and less than the brake limit temperature.

[0024] It can be understood that the braking energy = tire braking temperature / tire pressure, and the braking energy of each tire of the vehicle is calculated according to the formula, that is, the value of k. The braking energy of each tire is compared to determine the maximum value. The tire pressure is less than the limit tire pressure, and the braking warning temperature is less than the braking limit temperature.

[0025] The air ducts of the vehicle include: a front axle left air duct, a front axle right air duct, a rear axle left air duct, and a rear axle right air duct.

[0026] In the case that the maximum value of the braking energy of each tire of the vehicle is located in the B zone, the air duct can be controlled to be opened for 3 minutes, and stopped for 5 minutes after 3 minutes, and the air duct can be started at most 2 times continuously, and the tires and the brakes are cooled to reduce the braking energy to Figure 2 The A zone is shown, which prevents overheating, and the A zone satisfies: the tire pressure is less than the warning tire pressure, and the braking temperature is less than the braking warning temperature.

[0027] S102, in the case that the maximum value of the braking energy of each tire of the vehicle is located in the C zone, the vehicle is controlled to reduce the vehicle speed. As Figure 2 shown, the C zone satisfies: the tire pressure is greater than the warning tire pressure and less than the limit tire pressure, and the braking temperature is less than the braking warning temperature.

[0028] It can be understood that, in the case that the maximum value of the braking energy of each tire of the vehicle is located in the C zone, it indicates that the brake function is still normal at this time, and the vehicle is controlled to reduce the vehicle speed by 20% to reduce the braking energy to Figure 2 The A zone is shown, which prevents tire burst.

[0029] S103, in the case that the maximum value of the braking energy of each tire of the vehicle is located in the D zone or the E zone, the air duct is controlled to be opened, the vehicle is controlled to reduce the vehicle speed, and the auxiliary brake is started.

[0030] As Figure 2 shown, the D zone satisfies: the tire pressure is greater than the warning tire pressure and less than the limit tire pressure, and the braking temperature is greater than the braking warning temperature and less than the braking limit temperature; and the E zone satisfies: the braking temperature is greater than the braking limit temperature or the tire pressure is greater than the limit tire pressure.

[0031] It can be understood that, in the case that the maximum value of the braking energy of each tire of the vehicle is located in the D zone or the E zone, it indicates that the risk of tire burst is large at this time, and the brake function of the brake is reduced, therefore, not only the air duct is controlled to be opened for cooling, but also the vehicle is controlled to reduce the vehicle speed, and the auxiliary brake is started to reduce the braking energy to Figure 2 The A zone is shown. The auxiliary brake can be the brake through the engine or the retarder other than the brake.

[0032] In this embodiment, the air duct can be turned on for 3 minutes, then stopped for 5 minutes, and then turned on again. The air duct can be started up at most twice. If the cooling effect is poor after starting up the air duct twice, it indicates that the efficiency of cooling through the air duct is not ideal, and the effect of starting up the air duct three times will not be improved.

[0033] In some embodiments, the brake energy control method further comprises: In the case that the brake pedal stroke sensor continuously feeds back signals within the target time length, and the brake temperature of at least one tire reaches the brake warning temperature or the tire pressure reaches the warning tire pressure, the vehicle speed is controlled to be reduced, and the auxiliary brake is started.

[0034] It can be understood that the stroke data of the brake pedal is collected by the brake pedal stroke sensor, and the collected data is uploaded to the CAN bus (controller area network bus), and the vehicle control unit receives the data signal fed back by the brake pedal stroke sensor through the CAN bus. The target time length can be 1 minute. For example, when the brake pedal stroke sensor feeds back a signal for 1 minute, and at least one of the brake temperature or the tire pressure reaches the warning value, the vehicle speed is controlled to be reduced to below 20 km / h, and the auxiliary brake is started.

[0035] In some embodiments, the brake energy control method further comprises: In the case that the vehicle load exceeds the preset load threshold, and the brake temperature of the tire is lower than the brake warning temperature or the tire pressure is lower than the warning tire pressure, the vehicle speed is controlled to be reduced.

[0036] It can be understood that the tire pressure can be collected by the tire pressure sensor integrated with the temperature sensor, and the tire pressure sensor uploads the collected data to the CAN bus.

[0037] In some embodiments, in the case that the vehicle load exceeds the preset load threshold, and the brake temperature of the tire is lower than the brake warning temperature or the tire pressure is lower than the warning tire pressure, the vehicle speed is controlled to be reduced, comprising: In the case that the vehicle load exceeds the preset load threshold, and the brake temperature of the tire is lower than the brake warning temperature or the tire pressure is lower than the warning tire pressure, and the vehicle is driving on a flat road, the vehicle speed is controlled to be reduced to below the first target vehicle speed.

[0038] It can be understood that in the case that the vehicle load exceeds the preset load threshold, and the brake temperature of the tire is lower than the brake warning temperature or the tire pressure is lower than the warning tire pressure, and the vehicle is driving on a flat road, the vehicle speed can not need to be reduced too low at this time.

[0039] In some embodiments, in the case that the vehicle load exceeds the preset load threshold, and the brake temperature of the tire is lower than the brake warning temperature or the tire pressure is lower than the warning tire pressure, the vehicle speed is controlled to be reduced, further comprising: In the case that the vehicle load exceeds the preset load threshold, the brake temperature of the tire is lower than the brake warning temperature or the tire pressure is lower than the warning tire pressure, and the vehicle is driving on a downhill road, the vehicle speed is controlled to be lower than the second target vehicle speed, and the auxiliary brake is started; The second target vehicle speed is less than the first target vehicle speed.

[0040] It can be understood that in the case that the vehicle load exceeds the preset load threshold, the brake temperature of the tire is lower than the brake warning temperature or the tire pressure is lower than the warning tire pressure, and the vehicle is driving on a downhill road, the vehicle speed is controlled to be lower than the second target vehicle speed, and the auxiliary brake is started;

[0041] The first target vehicle speed can be 60 km / h, and the second target vehicle speed can be 20 km / h.

[0042] In some embodiments, the brake energy control method further comprises: In the case that the vehicle load exceeds the preset load threshold, and the brake temperature of at least one tire reaches the brake warning temperature or the tire pressure reaches the warning tire pressure, the vehicle speed is controlled to be reduced, and the auxiliary brake is started.

[0043] It can be understood that in the case that the vehicle load exceeds the preset load threshold, and the brake temperature of at least one tire reaches the brake warning temperature or the tire pressure reaches the warning tire pressure, it is indicated that only reducing the vehicle speed cannot achieve good results at this time, and the auxiliary brake needs to be started at the same time.

[0044] In some embodiments, the brake energy control method further comprises: In the case that the maximum value of the brake energy of each tire of the vehicle is located in the B zone, and after the air duct is controlled to be opened twice, the maximum value of the brake energy of each tire of the vehicle is still located in the B zone, the auxiliary brake is started.

[0045] It can be understood that in the case that the maximum value of the brake energy of each tire of the vehicle is located in the B zone, and after the air duct is controlled to be opened twice, the maximum value of the brake energy of each tire of the vehicle is still located in the B zone, it is indicated that the cooling effect by relying on the air duct is not ideal at this time, and the auxiliary brake needs to be started to assist the brake.

[0046] In some embodiments, the brake energy control method further comprises: In the case that the brake temperature difference between the left and right tires of the vehicle is greater than the preset temperature difference threshold, and the brake temperature ratio of the left and right tires of the vehicle exceeds the preset first temperature ratio range, a first brake temperature warning is issued; wherein the first temperature ratio range is obtained based on the left and right load ratio of the left and right tires of the vehicle with an up and down floating setting value.

[0047] It can be understood that the warning can be warned by the brake overheating warning light, the overload warning light, the vehicle controller, the instrument, etc.

[0048] The first temperature ratio range is based on a 5% fluctuation of the left-right load ratio of the left and right tires.

[0049] The first brake temperature warning is issued to remind the driver of the imbalance of the left and right brakes and to check the brakes.

[0050] In some embodiments, the brake energy control method further comprises: The second brake temperature warning is issued when the ratio of the average temperatures of the front and rear axle brakes exceeds a preset second temperature ratio range; The second temperature ratio range is based on a 5% fluctuation of the actual brake force ratio of the front and rear axles.

[0051] It can be understood that the second temperature ratio range is based on a 5% fluctuation of the actual brake force ratio of the front and rear axles.

[0052] The second brake temperature warning is issued to remind the driver to check the left and right brakes of the front axle when parking or to check the left and right brakes of the rear axle when parking.

[0053] In some embodiments, as shown in FIG. Figure 3 The method provided by the present application comprises: The vehicle control unit calculates the actual value of the brake energy based on the temperature value and the tire pressure value fed back by the integrated temperature and tire pressure sensor, compares and analyzes the preset curve of the system, controls the vehicle in stages, adjusts the brake temperature difference and the tire pressure, and reduces the brake overheating.

[0054] The vehicle control unit combines the brake pedal stroke, the brake duration, and the brake temperature to perform a special control strategy on the vehicle, actively starts auxiliary braking in specific situations, adjusts the abnormal brake temperature difference, and prevents brake overheating.

[0055] The vehicle control unit combines the load of the vehicle, the driving slope, and the brake energy of the front and rear tires to perform a special or emergency control strategy on the vehicle and reduce brake overheating.

[0056] The vehicle control unit compares the left and right tire brake temperatures with the left-right load ratio and compares the front and rear tire brake temperature ratio with the actual brake force distribution coefficient to give a corresponding brake abnormality warning and remind the driver to check the parts. Different risk level warning lights are displayed on the instrument to remind the corresponding part problems.

[0057] The method provided by the present application has the following technical effects: The application can reduce the brake temperature, reduce the tire pressure, reduce the vehicle speed, start the auxiliary brake, adjust the brake temperature difference of the front and rear brakes, and remind the driver according to the risk level when the tire brake is overheated or the tire pressure is too high according to the complex working conditions of vehicle operation, so as to improve the service life of the brake, prevent the safety accidents of brake failure and tire burst caused by thermal recession.

[0058] Front and rear axle brake braking energy calculation and analysis: the tire pressure sensor integrated with the temperature sensor is installed on the left and right tires of the front and rear axles, and the tire temperature and tire pressure values are fed back to the vehicle controller, the vehicle controller calculates the ratio of the temperature value and the tire pressure value, and adjusts the brake temperature difference of the front and rear brakes according to the ratio Figure 2 , and the vehicle is controlled according to the control strategy.

[0059] The system setting in the control strategy of the braking energy is shown in Table 1: Table 1: System setting

[0060] The brake temperature warning judgment strategy is shown in Table 2: Table 2: Brake temperature warning light judgment strategy

[0061] The brake energy control strategy is shown in Table 3: Table 3: Brake energy control strategy

[0062] The brake energy control device provided by the above embodiment can realize the technical solutions described in the above brake energy control method embodiment, and the principles of the specific implementation of the above modules or units can be referred to the corresponding content in the above brake energy control method embodiment, which will not be described here.

[0063] As shown in Figure 4 , the application also correspondingly provides an electronic device 400, which can be a vehicle controller. The electronic device 400 includes a processor 401, a memory 402 and a display 403. Figure 4 Only part of the components of the electronic device 400 are shown, but it should be understood that it is not required to implement all the shown components, and more or less components can be alternatively implemented.

[0064] The memory 402 can be an internal storage unit of the electronic device 400, such as a hard disk or a memory of the electronic device 400 in some embodiments. The memory 402 can also be an external storage device of the electronic device 400, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. equipped on the electronic device 400 in other embodiments.

[0065] Further, the memory 402 can include both an internal storage unit and an external storage device of the electronic device 400. The memory 402 is used to store application software installed on the electronic device 400 and various types of data.

[0066] The processor 401 can be a Central Processing Unit (CPU), a microprocessor, or other data processing chip in some embodiments, used to run program codes or process data stored in the memory 402, such as the brake energy control method in the present application.

[0067] The display 403 can be an LED display, a liquid crystal display, a touch liquid crystal display, an OLED (Organic Light-Emitting Diode) touch, etc. in some embodiments. The display 403 is used to display information of the electronic device 400 and to display a visualized user interface. The components 401-403 of the electronic device 400 communicate with each other through a system bus.

[0068] In some embodiments of the present application, when the processor 401 executes the brake energy control program in the memory 402, the following steps can be implemented: In the case that the maximum value of the brake energy of each tire of the vehicle is located in the B zone, the air duct is controlled to be opened; In the case that the maximum value of the brake energy of each tire of the vehicle is located in the C zone, the vehicle is controlled to reduce the speed; In the case that the maximum value of the brake energy of each tire of the vehicle is located in the D zone or the E zone, the air duct is controlled to be opened, the vehicle is controlled to reduce the speed, and the auxiliary brake is started; Wherein, the B zone satisfies that the tire pressure is less than the warning tire pressure, the brake temperature is greater than the brake warning temperature and less than the brake limit temperature; the C zone satisfies that the tire pressure is greater than the warning tire pressure and less than the limit tire pressure, the brake temperature is less than the brake warning temperature; the D zone satisfies that the tire pressure is greater than the warning tire pressure and less than the limit tire pressure, the brake temperature is greater than the brake warning temperature and less than the brake limit temperature; the E zone satisfies that the brake temperature is greater than the brake limit temperature or the tire pressure is greater than the limit tire pressure.

[0069] It should be understood that, in addition to the above functions, the processor 401 can also implement other functions when executing the brake energy control program in the memory 402. For details, refer to the descriptions of the corresponding method embodiments.

[0070] Further, the embodiments of the present application do not make specific limitations on the type of the electronic device 400 mentioned above. The electronic device 400 can be a portable electronic device such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop computer, etc. Exemplary embodiments of the portable electronic device include, but are not limited to, a portable electronic device running an IOS, an android, a microsoft, or other operating system. The portable electronic device described above can also be other portable electronic devices such as a laptop computer having a touch-sensitive surface (e.g., a touch panel), etc. It should also be understood that in some other embodiments of the present application, the electronic device 400 can also not be a portable electronic device, but a desktop computer having a touch-sensitive surface (e.g., a touch panel).

[0071] In another aspect, the present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the brake energy control method provided by the above methods. The method comprises: In the case where the maximum value of the brake energy of each tire of the vehicle is located in the B zone, the air duct is controlled to be opened; In the case where the maximum value of the brake energy of each tire of the vehicle is located in the C zone, the vehicle is controlled to reduce the speed; In the case where the maximum value of the brake energy of each tire of the vehicle is located in the D zone or the E zone, the air duct is controlled to be opened, the vehicle is controlled to reduce the speed, and the auxiliary brake is started; Wherein, the B zone satisfies: the tire pressure is less than the warning tire pressure, and the brake temperature is greater than the brake warning temperature and less than the brake limit temperature; the C zone satisfies: the tire pressure is greater than the warning tire pressure and less than the limit tire pressure, and the brake temperature is less than the brake warning temperature; the D zone satisfies: the tire pressure is greater than the warning tire pressure and less than the limit tire pressure, and the brake temperature is greater than the brake warning temperature and less than the brake limit temperature; and the E zone satisfies: the brake temperature is greater than the brake limit temperature or the tire pressure is greater than the limit tire pressure.

[0072] Those skilled in the art can understand that all or part of the processes of the above embodiments can be completed by a computer program instructing relevant hardware. The program can be stored in a computer-readable storage medium. The computer-readable storage medium includes a magnetic disk, an optical disk, a read-only memory, a random access memory, etc.

[0073] The braking energy control method and the vehicle controller provided by the application are described in detail above, and the principle and implementation mode of the application are described by using specific examples in this paper. The above description of the examples is only used to help understand the method of the application and its core idea. Meanwhile, for those skilled in the art, according to the idea of the application, the specific implementation mode and application range will be changed, and the above description should not be understood as a limitation on the application.

Claims

1. A brake energy control method, characterized by, The method comprises: controlling the air duct to open when the maximum value of the braking energy of each tire of the vehicle is located in the B zone; controlling the vehicle to reduce the vehicle speed when the maximum value of the braking energy of each tire of the vehicle is located in the C zone; controlling the air duct to open and controlling the vehicle to reduce the vehicle speed and starting the auxiliary braking when the maximum value of the braking energy of each tire of the vehicle is located in the D zone or the E zone; wherein the B zone satisfies: the tire pressure is less than the warning tire pressure, and the braking temperature is greater than the braking warning temperature and less than the braking limit temperature; the C zone satisfies: the tire pressure is greater than the warning tire pressure and less than the limit tire pressure, and the braking temperature is less than the braking warning temperature; the D zone satisfies: the tire pressure is greater than the warning tire pressure and less than the limit tire pressure, and the braking temperature is greater than the braking warning temperature and less than the braking limit temperature; and the E zone satisfies: the braking temperature is greater than the braking limit temperature or the tire pressure is greater than the limit tire pressure.

2. The brake energy control method according to claim 1, characterized by, The method further comprises: controlling the vehicle to reduce the vehicle speed and starting the auxiliary braking when the braking pedal stroke sensor continuously feeds back the signal within the target time length, and the braking temperature of at least one tire reaches the braking warning temperature or the tire pressure reaches the warning tire pressure.

3. The brake energy control method according to claim 1, characterized by, The method further comprises: controlling the vehicle to reduce the vehicle speed when the load of the vehicle exceeds the preset load threshold, and the braking temperature of the tire is lower than the braking warning temperature or the tire pressure is lower than the warning tire pressure.

4. The brake energy control method according to claim 3, characterized by, The method of controlling the vehicle to reduce the vehicle speed when the load of the vehicle exceeds the preset load threshold, and the braking temperature of the tire is lower than the braking warning temperature or the tire pressure is lower than the warning tire pressure comprises: controlling the vehicle to reduce the vehicle speed to below the first target vehicle speed when the load of the vehicle exceeds the preset load threshold, and the braking temperature of the tire is lower than the braking warning temperature or the tire pressure is lower than the warning tire pressure, and the vehicle is driving on a flat road.

5. The brake energy control method according to claim 4, characterized by, The method of controlling the vehicle to reduce the vehicle speed when the load of the vehicle exceeds the preset load threshold, and the braking temperature of the tire is lower than the braking warning temperature or the tire pressure is lower than the warning tire pressure further comprises: controlling the vehicle to reduce the vehicle speed to below the second target vehicle speed and starting the auxiliary braking when the load of the vehicle exceeds the preset load threshold, and the braking temperature of the tire is lower than the braking warning temperature or the tire pressure is lower than the warning tire pressure, and the vehicle is driving on a downhill road; wherein the second target vehicle speed is less than the first target vehicle speed.

6. The brake energy control method according to claim 1, characterized by, The method further comprises: controlling the vehicle to reduce the vehicle speed and starting the auxiliary braking when the load of the vehicle exceeds the preset load threshold, and the braking temperature of at least one tire reaches the braking warning temperature or the tire pressure reaches the warning tire pressure.

7. The brake energy control method according to claim 1, characterized by, The method further comprises: starting the auxiliary braking when the maximum value of the braking energy of each tire of the vehicle is located in the B zone, and the maximum value of the braking energy of each tire of the vehicle is still located in the B zone after the air duct is continuously controlled to open twice.

8. The brake energy control method according to claim 1, characterized by, The method further comprises: issuing a first braking temperature warning when the braking temperature difference between the left and right tires of the vehicle is greater than the preset temperature difference threshold, and the braking temperature ratio of the left and right tires of the vehicle exceeds the preset first temperature ratio range; wherein the first temperature ratio range is obtained based on the left and right load ratio of the vehicle with an up and down floating setting value.

9. The brake energy control method according to claim 1, characterized by, The method further comprises: issuing a second braking temperature warning when the average braking temperature ratio of the front and rear axles exceeds the preset second temperature ratio range. The second temperature ratio range is obtained based on the actual braking force ratio of the front and rear axles and the upper and lower floating setting values.

10. A vehicle control unit, characterized by, The device comprises a memory and a processor. The memory is configured to store a program. The processor is coupled to the memory and configured to execute the program stored in the memory to implement the steps of the brake energy control method according to any one of claims 1 to 9.

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