Brake temperature determination method and device, equipment and storage medium

Abstract

The invention discloses a brake temperature determination method and device, equipment and a storage medium, and belongs to the technical field of vehicles. The method comprises the steps that under the condition that a vehicle is started, the first temperature of a brake of the vehicle is obtained; in the running process of the vehicle, under the condition that the brake is in the braking state, the temperature rise value of the brake is determined according to the braking parameters of the brake in the braking state; and a second temperature of the brake is determined according to the first temperature and the temperature rise value. Due to the fact that the process of determining the second temperature of the brake does not need to depend on a temperature sensor arranged on the brake, the current temperature of the brake can be accurately determined when the brake is at any temperature, and the reliability of determining the temperature of the brake is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method, device, equipment and storage medium for determining brake temperature. Background Art

[0002] During the driving process of the vehicle, the brake temperature will continue to rise as the brakes are applied to the vehicle. Since excessively high brake temperature will affect the braking performance of the vehicle, it is necessary to determine the temperature of the vehicle's brakes.

[0003] In the related art, the temperature of the brake of the vehicle is monitored by a temperature sensor to obtain the temperature of the brake of the vehicle. The temperature sensor is arranged around the brake of the vehicle, usually on the brake of the vehicle, to ensure the accuracy of the temperature monitoring result.

[0004] Since the temperature variation range of the vehicle's brakes is large, if the temperature of the brakes exceeds the applicable environment of the temperature sensor, the temperature sensor may be damaged, and the temperature of the brakes cannot be determined by the temperature sensor. Determining the temperature of the brakes by the temperature sensor has the problem of low reliability. Summary of the invention

[0005] The present application provides a method, device, equipment and storage medium for determining brake temperature, which can improve the reliability of determining brake temperature. The technical solution is as follows:

[0006] According to one aspect of the present application, a method for determining brake temperature is provided, the method comprising:

[0007] When the vehicle is started, obtaining a first temperature of a brake of the vehicle;

[0008] During the driving of the vehicle, when the brake is in a braking state, determining a temperature rise value of the brake according to a braking parameter of the brake in the braking state;

[0009] A second temperature of the brake is determined according to the first temperature and the temperature increase value.

[0010] According to another aspect of the present application, a device for determining brake temperature is provided, the device comprising:

[0011] an acquisition module, configured to acquire a first temperature of a brake of the vehicle when the vehicle is started;

[0012] a determination module, configured to determine, during the driving process of the vehicle, when the brake is in a braking state, a temperature rise value of the brake according to a braking parameter of the brake in the braking state;

[0013] The determination module is further configured to determine a second temperature of the brake according to the first temperature and the temperature rise value.

[0014] In an optional design, the braking parameter includes at least one of a braking pressure and a braking duration; and the determining module is used to:

[0015] calculating a first integral of the braking pressure to the braking duration, wherein the braking duration is a duration during which the brake is in the braking state;

[0016] A temperature increase value of the brake is determined according to the first integral.

[0017] In an optional design, the determining module is used to:

[0018] determining a temperature rise value of the brake according to the first integral through a first mapping table;

[0019] The first mapping table includes the corresponding relationship between different integrals and different temperature rise values, and the different integrals include the integrals of different braking pressures for different braking durations.

[0020] In an optional design, the determining module is used to:

[0021] determining an influence coefficient corresponding to the temperature rise value according to a first ambient temperature when the brake is in the braking state and a speed of the vehicle;

[0022] A calibrated temperature rise value of the brake is determined according to the temperature rise value and the influence coefficient.

[0023] In an optional design, the determining module is used to:

[0024] When the brake enters the braking state for the first time after the vehicle is started, determining a second temperature of the brake according to the sum of the first temperature and the temperature rise value;

[0025] When the brake enters the braking state for the i-th time after the vehicle is started, determining the second temperature of the brake according to the third temperature and the temperature rise value;

[0026] The third temperature is the temperature of the brake when the brake enters the braking state for the (i-1)th time, the third temperature is determined based on the first temperature, and i is a positive integer greater than 1.

[0027] In an optional design, the acquisition module is used to:

[0028] When the vehicle is started, obtaining a fourth temperature, the fourth temperature being the temperature of the brake of the vehicle at a stop time, the stop time being the time when the vehicle stops running most recently before starting;

[0029] Determine the temperature change value of the brake between the stop time and the start time by calculating a second integral of the second ambient temperature between the stop time and the start time to the parking time, wherein the parking time is the time between the stop time and the start time, and the start time is the time when the vehicle starts;

[0030] A first temperature of the brake is determined according to the sum of the fourth temperature and the temperature change value.

[0031] In an optional design, the device further includes:

[0032] a sending module, configured to send a first prompt message when the second temperature is greater than a first temperature threshold, wherein the first prompt message is used to prompt that the temperature of the brake is abnormal;

[0033] The sending module is further used to send a second prompt message when the second temperature is greater than a second temperature threshold, wherein the second prompt message is used to prompt the user to park the vehicle to reduce the temperature of the brake;

[0034] The second temperature threshold is greater than the first temperature threshold.

[0035] According to another aspect of an embodiment of the present application, a computer device is provided, comprising: a processor and a memory, wherein at least one program is stored in the memory; the processor is used to execute at least one program in the memory to implement the above-mentioned method for determining the brake temperature.

[0036] According to another aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which at least one program is stored. The at least one program is loaded and executed by a processor to implement the above-mentioned method for determining the brake temperature.

[0037] According to another aspect of an embodiment of the present application, a computer program product or a computer program is provided, which includes computer instructions, the computer instructions are stored in a computer-readable storage medium, a processor obtains the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to implement the above-mentioned method for determining the brake temperature.

[0038] The beneficial effects of the technical solution provided by this application include at least:

[0039] When the brake enters the braking state during the driving process of the vehicle, the temperature rise value of the brake is determined according to the braking parameters of the brake in the braking state, and the second temperature of the brake in the braking state can be determined in combination with the first temperature of the brake when the vehicle is started this time. Since the process of determining the second temperature of the brake does not need to rely on the temperature sensor set on the brake, it is possible to accurately determine the current temperature of the brake at any temperature of the brake, thereby improving the reliability of determining the temperature of the brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of 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 creative work.

[0041] Figure 1 is a schematic diagram of a process for determining brake temperature provided by an exemplary embodiment of the present application;

[0042] Figure 2 is a flow chart of a method for determining brake temperature provided by an exemplary embodiment of the present application;

[0043] Figure 3 is a flow chart of a method for determining brake temperature provided by an exemplary embodiment of the present application;

[0044] Figure 4 is a schematic diagram of a process for determining brake temperature provided by an exemplary embodiment of the present application;

[0045] Figure 5 is a schematic diagram of a process for determining brake temperature provided by an exemplary embodiment of the present application;

[0046] Figure 6 is a schematic diagram of a process for determining brake temperature provided by an exemplary embodiment of the present application;

[0047] Figure 7 is a structural schematic diagram of a device for determining brake temperature provided by an exemplary embodiment of the present application;

[0048] Figure 8 is a structural schematic diagram of a device for determining brake temperature provided by an exemplary embodiment of the present application;

[0049] Fig. 9 It is a structural block diagram of a computer device provided by an exemplary embodiment of the present application.

[0050] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0052] During the driving process of the vehicle, the brake temperature will continue to rise as the brakes are applied to the vehicle. For example, after continuous or long-term braking of the vehicle, the brake temperature will be too high, thereby affecting the braking performance of the vehicle and causing safety hazards. Therefore, it is necessary to determine the temperature of the vehicle's brakes and to prompt the driver of the vehicle. In the related art, the temperature of the vehicle's brakes is monitored by a temperature sensor to obtain the temperature of the vehicle's brakes. The temperature sensor is arranged around the vehicle's brakes, usually on the vehicle's brakes, to ensure the accuracy of the temperature monitoring results.

[0053] Since the temperature variation range of the vehicle's brakes is large, when the temperature of the brakes exceeds the applicable environment of the temperature sensor, the temperature sensor may be damaged and fail, resulting in the inability to determine the temperature of the vehicle's brakes through the temperature sensor. Determining the temperature of the brakes through the temperature sensor has the problem of low reliability.

[0054] The method provided in the embodiment of the present application can determine the temperature rise value of the brake according to the braking parameters of the brake in the braking state when the vehicle enters the braking state during driving, and can determine the second temperature of the brake in the braking state in combination with the first temperature of the brake when the vehicle is started this time. Since the process of determining the second temperature of the brake does not need to rely on the temperature sensor set on the brake, it is possible to accurately determine the current temperature of the brake at any temperature of the brake, thereby improving the reliability of determining the temperature of the brake.

[0055] Figure 1 FIG. 1 is a schematic diagram of a process for determining brake temperature provided by an exemplary embodiment of the present application. Figure 1As shown, when the vehicle 101 is started, the on-board controller will obtain the first temperature 102 of the brake of the vehicle 101, and the first temperature 102 is the temperature of the brake when the vehicle 101 is started. After the vehicle 101 is started this time, during the driving process of the vehicle 101, when the brake is in a braking state, the on-board controller will calculate the first integral of the brake pressure 103 of the brake in the braking state to the braking time, and determine the temperature rise value 104 of the brake according to the first integral. Among them, the braking time is the time the brake is in the braking state. After that, according to the first temperature 102 and the temperature rise value 104, the second temperature 105 of the brake can be determined. Optionally, the on-board controller determines the temperature rise value 104 of the brake according to the first integral through a first mapping table. The first mapping table includes the corresponding relationship between different integrals and different temperature rise values ​​104, and the different integrals include the integrals of different brake pressures 103 to different braking time. For the process of determining the second temperature 105 of the brake: when the brake enters the braking state for the first time after the vehicle 101 is started, the on-board controller determines the second temperature 105 of the brake according to the sum of the first temperature 102 and the temperature rise value 104. When the brake enters the braking state for the i-th time after the vehicle 101 is started, the on-board controller determines the second temperature 105 of the brake according to the third temperature and the temperature rise value 104. Among them, the third temperature is the temperature of the brake when the brake enters the braking state for the i-1th time, the third temperature is determined based on the first temperature 102, and i is a positive integer greater than 1. Optionally, in the process of determining the second temperature 105 of the brake according to the third temperature and the temperature rise value 104, the on-board controller also refers to the cooling value of the on-board controller between the i-1th time of entering the braking state and the i-th time of entering the braking state. In this case, the second temperature 105 is equal to the difference between the calculation result of the sum of the third temperature and the temperature rise value 104 and the cooling value, that is, the second temperature 105 = the third temperature + the temperature rise value 104 - the cooling value.

[0056] In some embodiments, for the process of obtaining the first temperature 102: when the vehicle 101 is started, the on-board controller will obtain the fourth temperature, which is the temperature of the brake of the vehicle 101 at the stop time, and the stop time is the time when the vehicle 101 stopped running most recently before this start. Then, by calculating the second integral of the second ambient temperature between the stop time and the start time to the parking time, the on-board controller can determine the temperature change value of the brake between the stop time and the start time, the parking time is the time between the stop time and the start time, the start time is the time when the vehicle 101 starts, and the temperature change value is the value of the temperature change of the brake at the start time compared to the stop time. According to the sum of the fourth temperature and the temperature change value, the on-board controller can determine the first temperature 102 of the brake.

[0057] In some embodiments, when the second temperature is greater than the first temperature threshold, the vehicle controller will also send a first prompt message, and the first prompt message is used to prompt that the temperature of the brake is abnormal. For example, the first prompt message is used to prompt the driver of the vehicle that the brake temperature of the vehicle is high and pay attention to driving safety. When the second temperature is greater than the second temperature threshold, the vehicle controller will also send a second prompt message, and the second prompt message is used to prompt the driver to park the vehicle to reduce the temperature of the brake. For example, the second prompt message is used to prompt the driver of the vehicle to stop the car to cool down and to prompt precautions for cooling the brake. Among them, the above-mentioned second temperature threshold is greater than the first temperature threshold.

[0058] When the brake enters the braking state during the driving process of the vehicle, the temperature rise value of the brake is determined according to the brake pressure of the brake in the braking state, and the second temperature of the brake in the braking state can be determined in combination with the first temperature of the brake when the vehicle is started this time. Since the process of determining the second temperature of the brake does not need to rely on the temperature sensor set on the brake, it is possible to accurately determine the current temperature of the brake at any temperature of the brake, thereby improving the reliability of determining the temperature of the brake.

[0059] Figure 2 FIG. 1 is a flow chart of a method for determining brake temperature provided by an exemplary embodiment of the present application. The method can be used in a vehicle, such as an onboard controller of a vehicle. Figure 2 As shown, the method includes:

[0060] Step 202: When the vehicle is started, obtain a first temperature of the brake of the vehicle.

[0061] The brake includes components for braking the vehicle. The brake is a component with functions such as slowing down, stopping or keeping the vehicle in a stopped state during driving. The brake is a component for stopping or slowing down the driving component that drives the vehicle to move. In some embodiments, the brake of the vehicle includes a service brake and a parking brake. Among them, the service brake is a brake used to brake the vehicle during the vehicle's driving process, and the parking brake is a brake used to brake the vehicle during the vehicle's parking process. The brake in the embodiment of the present application refers to the vehicle's service brake. In some embodiments, the brake in the embodiment of the present application may also be referred to as a brake, a foot brake, or a service brake.

[0062] The on-board controller is a controller integrated in the vehicle for managing vehicle components. In some embodiments, the on-board controller is a controller for managing the brake-related components of the vehicle. Optionally, in addition to managing the brake-related components of the vehicle, the on-board controller can also be used to manage other components of the vehicle, and the embodiment of the present application is not limited to this. The vehicle in the embodiment of the present application includes at least one of a one-wheeled vehicle, a two-wheeled vehicle, a three-wheeled vehicle, a four-wheeled vehicle, and a vehicle with more wheels. The driving form of the vehicle includes at least one of front drive, rear drive, and four-wheel drive. The power source of the vehicle includes at least one of gasoline, diesel, electricity, hydrogen, and hybrid power. In some embodiments, the vehicle in the embodiment of the present application includes but is not limited to fuel vehicles, pure electric vehicles, plug-in hybrid vehicles, oil-electric hybrid vehicles, extended-range hybrid vehicles, fuel motorcycles, electric motorcycles, and electric bicycles. In some embodiments, the vehicle in the embodiment of the present application refers to an electric vehicle, and the on-board controller in the embodiment of the present application refers to an electronic stability controller (Electronic Stability Controller, ESC).

[0063] The first temperature is the temperature of the vehicle's brake when the vehicle is started. Optionally, when the vehicle is started, the on-board controller obtains the temperature of the vehicle's brake at the time of the vehicle's start, thereby obtaining the first temperature of the brake. The vehicle's start time is the time when the vehicle is started this time, and the vehicle's start time may be the time when driving power is provided to the vehicle, such as the time when the vehicle is started by a start button in the vehicle. In some embodiments, before the vehicle is started, the vehicle is in a parking state, and the parking state may also be understood as a stopped running state. The parking state is a state in which the vehicle is stopped or stationary, and the driving power provided to the vehicle is cut off. For example, for a fuel-driven vehicle, the parking state may be a state in which the vehicle is turned off; for an electric-driven vehicle, the parking state may be a state in which the vehicle is powered off.

[0064] In some embodiments, the vehicle controller obtains the first temperature of the brake through a temperature sensor. The temperature sensor is arranged at the first end of the telescopic part, and the second end of the telescopic part is connected to the housing of the vehicle, for example, connected to the position in the housing of the vehicle for accommodating the tire of the vehicle, and the first end and the second end are opposite ends of the telescopic part. At the start-up time of the vehicle, the telescopic part will extend a preset distance in the first direction so that the temperature sensor is close to the brake of the vehicle, so as to collect the first temperature of the brake through the temperature sensor. Among them, the first direction is the direction close to the brake of the vehicle. After collecting the first temperature, the telescopic part will shrink a preset distance in the second direction so that the temperature sensor is away from the brake of the vehicle. Among them, the second direction is the direction away from the brake of the vehicle. Since the temperature of the brake is usually low when the vehicle is started, it can meet the applicable environment of the temperature sensor, so in this case, the first temperature of the brake can be reliably collected through the temperature sensor. Because after collecting the first temperature, the temperature sensor will be away from the brake of the vehicle, even if the temperature of the brake of the vehicle is high and exceeds the applicable environment requirements of the temperature sensor, it will not cause damage to the temperature sensor. Thereby ensuring that the temperature sensor can reliably collect the first temperature of the brake.

[0065] In some embodiments, when the vehicle is started, the vehicle controller will obtain the temperature of the vehicle's brake at the time of stopping. The stopping time is the time when the vehicle stopped running most recently before the current start, which can be understood as the time when the vehicle was parked most recently before the current start. Then, based on the ambient temperature between the vehicle's stop time and the start time, the vehicle controller can determine the temperature change value of the vehicle's brake at the start time compared to the stop time, and then based on the temperature change value and the temperature of the vehicle's brake at the stop time, the temperature of the vehicle's brake at the start time can be determined.

[0066] In some embodiments, when the vehicle is started for the first time after leaving the factory, the calibration personnel of the vehicle manufacturer will use a temperature sensor to detect the temperature of the vehicle's brakes, thereby obtaining the calibration temperature of the vehicle's brakes, that is, the first temperature when the vehicle is started for the first time after leaving the factory. Then, the method provided in the embodiment of the present application can be used to determine the temperature of the vehicle's brakes at various times after leaving the factory. The process of determining the temperature of the brakes can refer to the relevant content in the embodiment of the present application, and the embodiment of the present application will not be repeated here.

[0067] In some embodiments, when the onboard controller determines the temperature of the brake corresponding to each wheel of the vehicle in a braking state, the onboard controller obtains the first temperature of the brake corresponding to each wheel respectively.

[0068] Step 204: When the vehicle is traveling and the brake is in a braking state, a temperature rise value of the brake is determined according to the braking parameters of the brake in the braking state.

[0069] The process of vehicle driving refers to the process of vehicle driving after this start. During the process of vehicle driving, the driving state of the vehicle includes at least one of the following: accelerating, decelerating, driving at a constant speed, and stopping. The braking state refers to the state of braking the vehicle by the brake, and the braking parameters include parameters related to the brake in the process of braking the vehicle by the brake. Optionally, the braking parameters include at least one of the braking pressure and braking duration of the brake in the braking state. Among them, the braking pressure is the pressure generated by the brake for braking during the braking process, such as the pressure of the brake master cylinder of the brake. The braking duration is used to reflect the duration of the brake entering the braking state. The temperature rise value of the brake is used to reflect the value of the temperature increase of the brake when the brake enters the braking state.

[0070] Optionally, the on-board controller calculates the first integral of the brake pressure to the braking duration in the braking parameters, and determines the temperature rise value of the brake according to the first integral. Since the brake pressure is related to the temperature rise value of the brake (the greater the brake pressure, the faster the brake temperature rises; the smaller the brake pressure, the slower the brake temperature rises), and the first integral of the brake pressure to the braking duration can reflect the cumulative effect of the brake pressure on the brake temperature under the braking duration, the on-board controller can determine the temperature rise value of the brake under the braking state according to the first integral.

[0071] In some embodiments, when the brake is in a braking state, the vehicle controller determines the temperature rise value of the brake at the second moment according to the braking parameters of the brake at the moment between the first moment and the second moment. The first moment is the moment when the brake enters the braking state this time, and the second moment is the moment when the temperature rise value of the brake is determined, which can be understood as the current moment. Through the above process, the vehicle controller can determine the temperature rise value corresponding to each moment of the brake in the braking state.

[0072] In some embodiments, when the onboard controller determines the temperature of the brake corresponding to each wheel of the vehicle in a braking state, the onboard controller determines the temperature rise value for the brake corresponding to each wheel respectively.

[0073] Step 206: Determine a second temperature of the brake according to the first temperature and the temperature rise value.

[0074] The second temperature of the brake is used to reflect the temperature of the brake in the braking state. Optionally, when the brake enters the braking state for the first time after the vehicle is started, the on-board controller determines the current second temperature of the brake based on the sum of the first temperature and the temperature rise value. When the brake does not enter the braking state for the first time after the vehicle is started, the on-board controller determines the current second temperature of the brake based on the sum of the temperature when the brake entered the braking state the last time and the temperature rise value. The temperature when the brake entered the braking state the last time was determined based on the first temperature, for example, the last time the brake entered the braking state was the first time the brake entered the braking state after the vehicle was started. In this case, the on-board controller can determine the temperature when the brake entered the braking state the last time based on the sum of the first temperature and the temperature rise value when the brake entered the braking state the last time. By looping the above process, the on-board controller can determine the temperature of the brake each time it enters the braking state.

[0075] In some embodiments, when the brake is in a braking state, the vehicle-mounted controller determines the temperature rise value corresponding to each moment in the braking state, and thereby determines the second temperature corresponding to each moment in the braking state based on the temperature rise value corresponding to each moment in the braking state.

[0076] In some embodiments, when the on-board controller determines the temperature of the brake corresponding to each wheel of the vehicle under the braking state, the on-board controller determines the second temperature of the brake corresponding to each wheel under the braking state based on the first temperature obtained for the brake corresponding to each wheel and the temperature rise value determined for the brake corresponding to each wheel.

[0077] In summary, the method provided in this embodiment can determine the temperature rise value of the brake according to the braking parameters of the brake in the braking state when the vehicle enters the braking state during driving, and can determine the second temperature of the brake in the braking state in combination with the first temperature of the brake when the vehicle is started this time. Since the process of determining the second temperature of the brake does not need to rely on the temperature sensor set on the brake, it is possible to accurately determine the current temperature of the brake at any temperature of the brake, thereby improving the reliability of determining the temperature of the brake.

[0078] Figure 3 FIG. 1 is a flow chart of a method for determining brake temperature provided by an exemplary embodiment of the present application. The method can be used in a vehicle, such as an onboard controller of a vehicle. Figure 3 As shown, the method includes:

[0079] Step 302: When the vehicle is started, obtain a first temperature of the brake of the vehicle.

[0080] The brake includes components for braking the vehicle. The brake is a component that has the function of slowing down, stopping or keeping the vehicle in a stopped state during driving. The brake is a component that is used to stop or slow down the driving component that drives the vehicle. In some embodiments, the brake of the vehicle includes a service brake and a parking brake. Among them, the service brake is a brake used to brake the vehicle during driving, and the parking brake is a brake used to brake the vehicle during parking. The brake in the embodiment of the present application refers to the service brake of the vehicle.

[0081] The on-board controller is a controller integrated in the vehicle for managing vehicle components. In some embodiments, the on-board controller is a controller for managing the brake-related components of the vehicle. Optionally, in addition to being used to manage the brake-related components of the vehicle, the on-board controller can also be used to manage other components of the vehicle, and the embodiments of the present application are not limited to this. The vehicle in the embodiments of the present application includes at least one of a one-wheeled vehicle, a two-wheeled vehicle, a three-wheeled vehicle, a four-wheeled vehicle, and a vehicle with more wheels. The drive form of the vehicle includes at least one of front drive, rear drive, and four-wheel drive. The power source of the vehicle includes at least one of gasoline, diesel, electricity, hydrogen, and hybrid power. In some embodiments, the vehicle in the embodiments of the present application refers to an electric car, and the on-board controller in the embodiments of the present application refers to ESC.

[0082] The first temperature is the temperature of the vehicle's brake when the vehicle is started. Optionally, when the vehicle is started, the on-board controller obtains the temperature of the vehicle's brake at the time of the vehicle's start, thereby obtaining the first temperature of the brake. The vehicle's start time is the time when the vehicle is started this time, and the vehicle's start time may be the time when driving power is provided to the vehicle, such as the time when the vehicle is started by a start button in the vehicle. In some embodiments, before the vehicle is started, the vehicle is in a parking state, and the parking state may also be understood as a stopped running state. The parking state is a state in which the vehicle is stopped or stationary, and the driving power provided to the vehicle is cut off. For example, for a fuel-driven vehicle, the parking state may be a state in which the vehicle is turned off; for an electric-driven vehicle, the parking state may be a state in which the vehicle is powered off.

[0083] In some embodiments, when the vehicle is started, the on-board controller will obtain the fourth temperature. Wherein, the fourth temperature is the temperature of the brake of the vehicle at the stop time, and the stop time is the time when the vehicle stops running most recently before starting, which can be understood as the time when the vehicle is parked most recently before this start. After that, the on-board controller can determine the temperature change value of the brake between the stop time and the start time by calculating the second integral of the second ambient temperature between the stop time and the start time to the parking time. Wherein, the parking time is the time between the stop time and the start time, and the start time is the time when the vehicle starts. Since the ambient temperature is related to the temperature change value of the brake (the higher the ambient temperature, the slower the brake cools down; the lower the ambient temperature, the faster the brake cools down), and the second integral of the ambient temperature to the parking time can reflect the cumulative effect of the ambient temperature on the brake temperature under the parking time, the on-board controller can determine the temperature change value of the brake under the parking time according to the second integral. Optionally, the on-board controller determines the temperature change value of the brake according to the second integral through a second mapping table. Among them, the second mapping table includes the correspondence between different integrals and different temperature change values, and the different integrals include the integrals of different ambient temperatures for different parking times. In some embodiments, the second mapping table is obtained by the vehicle manufacturer through a temperature change detection experiment on the brakes of the vehicle under ambient temperature. The on-board controller can determine the first temperature of the brake based on the sum of the fourth temperature and the temperature change value. In some embodiments, the above-mentioned temperature change value is used to reflect the value of the temperature drop of the brake at the start time compared to the stop time, and the on-board controller can determine the first temperature of the brake based on the difference between the fourth temperature and the temperature change value. Optionally, the on-board controller obtains the second ambient temperature between the stop time and the start time through the on-board air conditioning system of the vehicle.

[0084] In some embodiments, the vehicle controller predicts the temperature change value of the brake between the stop time and the start time according to the fourth temperature of the vehicle's brake at the stop time, the second ambient temperature between the stop time and the start time, and the parking time between the stop time and the start time through a temperature change prediction model. Optionally, the temperature change prediction model is an artificial intelligence (AI) model, such as a machine learning model built based on a neural network (NN). The temperature change prediction model is obtained by training the temperature of the brake at the first sample time, the temperature of the brake at the second sample time, the first sample ambient temperature between the first sample time and the second sample time, and the time between the first sample time and the second sample time. The vehicle where the brake is located is in a parking state between the first sample time and the second sample time.

[0085] In some embodiments, the fourth temperature is determined by the vehicle controller according to the temperature of the vehicle's brake at the braking moment when the brake entered the braking state most recently before the current start, and the sum of the first temperature change value. The first temperature change value is used to reflect the value of the temperature change of the brake at the stop moment compared to the braking moment. Optionally, the vehicle controller can determine the first temperature change value of the brake between the braking moment and the stop moment by calculating the third integral of the third ambient temperature between the braking moment and the stop moment to the heat dissipation time. The heat dissipation time is the time between the braking moment and the stop moment. Optionally, the vehicle controller obtains the third ambient temperature between the braking moment and the stop moment through the vehicle's onboard air conditioning system. For the process of determining the first temperature change value according to the third integral, the process of determining the temperature change value according to the second integral can be referred to, and the embodiments of the present application will not be described in detail. For the process of determining the temperature of the brake when entering the braking state, the process of determining the second temperature in the embodiments of the present application can be referred to, and the embodiments of the present application will not be described in detail. In some embodiments, at each stop moment, the vehicle controller will determine the corresponding fourth temperature through the above process. For example, the vehicle in the embodiment of the present application is an electric car. Whenever the vehicle is powered off, the on-board controller will determine the corresponding fourth temperature through the above process and save the determined fourth temperature for use in determining the corresponding temperature change value.

[0086] Step 304: When the vehicle is traveling and the brake is in a braking state, a temperature rise value of the brake is determined according to a braking parameter of the brake in the braking state.

[0087] The process of vehicle driving refers to the process of vehicle driving after this start. During the process of vehicle driving, the driving state of the vehicle includes at least one of the following: accelerating, decelerating, driving at a constant speed, and stopping. The braking state refers to the state of braking the vehicle by the brake, and the braking parameters include parameters related to the brake in the process of braking the vehicle by the brake. In some embodiments, the on-board controller determines whether the brake is in a braking state based on the detection result of the brake pedal sensor. The brake pedal sensor is set at the brake pedal of the vehicle, and is used to detect whether the brake pedal is pressed. When the brake pedal is pressed, the brake is in a braking state; when the brake pedal is not pressed, the brake is not in a braking state.

[0088] Optionally, the braking parameter includes at least one of a braking pressure and a braking duration of the brake in a braking state. The braking pressure is the pressure generated by the brake for braking during the braking process, such as the pressure of the brake master cylinder. The braking duration is used to reflect the duration of the brake entering the braking state. The temperature rise value of the brake is used to reflect the value of the temperature rise of the brake when the brake enters the braking state.

[0089] Optionally, the on-board controller determines the temperature rise value of the brake according to the first integral by calculating the first integral of the braking pressure over the braking duration. The braking duration is the duration that the brake is in the braking state. Since the braking pressure is related to the temperature rise value of the brake (the greater the braking pressure, the faster the brake heats up; the smaller the braking pressure, the slower the brake heats up), and the first integral of the braking pressure over the braking duration can reflect the cumulative effect of the braking pressure on the brake temperature under the braking duration, the on-board controller can determine the temperature rise value of the brake under the braking state according to the first integral. Optionally, the on-board controller determines the temperature rise value of the brake according to the first integral through a first mapping table. The first mapping table includes the corresponding relationship between different integrals and different temperature rise values, and the different integrals include the integrals of different braking pressures over different braking durations. In some embodiments, the first mapping table is obtained by the vehicle manufacturer through a temperature change detection experiment on the vehicle's brake under the braking state.

[0090] In some embodiments, the on-board controller predicts the temperature rise value of the brake in the braking state through a temperature rise prediction model based on the brake pressure of the vehicle's brake, the braking time of the brake, the speed of the vehicle when the brake is in the braking state, and the fourth ambient temperature of the external environment of the vehicle in the braking state. Optionally, the temperature rise prediction model is an AI model, such as a machine learning model built based on NN. In the process of predicting the temperature rise value through the temperature rise prediction model, the on-board controller determines the first mean and first variance of the brake pressure of the vehicle's brake at each moment in the braking state, the second mean and second variance of the vehicle's speed at each moment in the braking state, and the third mean and third variance of the fourth ambient temperature at each moment in the braking state according to the above data, and then inputs the first mean, first variance, second mean, second variance, third mean, third variance and braking time into the temperature rise prediction model to obtain the temperature rise value predicted by the temperature rise prediction model. Optionally, the temperature rise prediction model is trained based on the first sample mean, the first sample variance, the second sample mean, the second sample variance, the third sample mean, the third sample variance, the sample braking time and the sample temperature rise value. The first sample mean and the first sample variance are determined based on the sample braking pressure of the vehicle's brake at each moment in the braking state, the second sample mean and the second sample variance are determined based on the sample vehicle speed at each moment in the braking state, the third sample mean and the third sample variance are determined based on the second sample ambient temperature of the vehicle's external environment at each moment in the braking state, the sample braking time is the time the brake is in the braking state during the process of obtaining the above sample data, and the sample temperature rise value is used to reflect the value of the temperature increase of the brake in the braking state during the process of obtaining the above sample data.

[0091] In some embodiments, when the temperature rise value is determined by the first integral, the vehicle controller will also determine the influence coefficient corresponding to the temperature rise value according to the first ambient temperature and the vehicle speed when the brake is in the braking state. And according to the temperature rise value and the influence coefficient, the calibration temperature rise value of the brake is determined, so as to determine the second temperature of the brake in the braking state according to the calibration temperature rise value. Wherein, the influence coefficient is a real number greater than 0, and the influence coefficient is positively correlated with the first ambient temperature and the vehicle speed. Optionally, the vehicle controller obtains the calibration temperature rise value by calculating the product of the influence coefficient and the temperature rise value determined according to the first integral. Optionally, the influence coefficient is determined by a third mapping table according to the average value of the first ambient temperature and the average value of the vehicle speed when the brake is in the braking state. Wherein, the third mapping table includes the combination of different ambient temperature average values ​​and different vehicle speed average values, and the corresponding relationship between different influence coefficients. In some embodiments, the third mapping table is obtained by the vehicle manufacturer through a temperature change detection experiment on the brake of the vehicle under the braking state.

[0092] Step 306: Determine a second temperature of the brake according to the first temperature and the temperature rise value.

[0093] The second temperature of the brake is used to reflect the temperature of the brake in the braking state. Optionally, when the brake enters the braking state for the first time after the vehicle is started, the on-board controller determines the second temperature of the brake according to the sum of the first temperature and the temperature rise value. When the brake enters the braking state for the i-th time after the vehicle is started, the on-board controller determines the second temperature of the brake according to the third temperature and the temperature rise value. Among them, the third temperature is the temperature of the brake when the brake enters the braking state for the i-1th time, and the third temperature is determined based on the first temperature, and i is a positive integer greater than 1. For example, the brake enters the braking state for the i-1th time when the brake enters the braking state for the first time (the first time) after the vehicle is started. In this case, the on-board controller can determine the temperature of the brake when it enters the braking state for the i-1th time based on the sum of the first temperature and the temperature rise value when the brake enters the braking state for the i-1th time, thereby obtaining the third temperature. Afterwards, the temperature of the brake when the brake enters the braking state for the i-th time (the second time) can be determined based on the third temperature and the sum of the temperature rise value when the brake enters the braking state for the i-th time. The determination process of the temperature rise value when the brake enters the braking state for the i-1th time and the temperature rise value when the brake enters the braking state for the i-th time can refer to the relevant content in step 304, which is not described in detail in the embodiment of the present application. By looping the above process, the vehicle controller can determine the temperature of the brake each time it enters the braking state.

[0094] For example, Figure 4 FIG. 1 is a schematic diagram of a process for determining brake temperature provided by an exemplary embodiment of the present application. Figure 4As shown, when the vehicle 401 starts, the on-board controller will obtain the first temperature 402 of the vehicle's brake. When the vehicle 401 enters the braking state for the first time, the on-board controller will determine the temperature rise value (temperature rise value 1) of the brake in the braking state, and thus determine the second temperature 403 of the on-board controller when it first enters the braking state based on the sum of the first temperature 402 and the temperature rise value 1. When the vehicle 401 enters the braking state for the second time, the on-board controller will determine the temperature rise value (temperature rise value 2) of the brake in the braking state, and thus determine the second temperature 404 of the on-board controller when it second enters the braking state based on the sum of the second temperature 403 and the temperature rise value 2. By looping the above process, the on-board controller can determine the temperature of the brake each time it enters the braking state.

[0095] In some embodiments, it is considered that the temperature of the brake will change between two adjacent brake states. When the brake enters the brake state for the first time after the vehicle is started, the on-board controller determines the second temperature of the brake according to the sum of the first temperature, the temperature rise value when the brake enters the brake state for the first time, and the second temperature change value. When the brake enters the brake state for the i-th time after the vehicle is started, the on-board controller determines the second temperature of the brake according to the sum of the third temperature, the temperature rise value when the brake enters the brake state for the i-th time, and the third temperature change value. Among them, the second temperature change value is used to reflect the value of the temperature change of the brake at the moment of the first entry into the braking state compared to the start time, and the third temperature change value is used to reflect the value of the temperature change of the brake at the moment of the i-th entry into the braking state compared to the moment of the i-1-th entry into the braking state. Optionally, the on-board controller can determine the second temperature change value of the brake between the moment of the first entry into the braking state and the start time by calculating the fourth integral of the fifth ambient temperature between the moment of the first entry into the braking state and the start time to the first heat dissipation time. The first heat dissipation time is the time between the moment of the first entry into the braking state and the start time. The vehicle controller can determine the third temperature change value between the moment when the brake enters the braking state for the i-th time and the moment when the brake enters the braking state for the i-1th time by calculating the fifth integral of the sixth ambient temperature and the second heat dissipation time between the moment when the brake enters the braking state for the i-th time and the moment when the brake enters the braking state for the i-1th time. The second heat dissipation time is the time between the moment when the brake enters the braking state for the i-th time and the moment when the brake enters the i-1th time. For the process of determining the second temperature change value based on the fourth integral and the process of determining the third temperature change value based on the fifth integral, reference can be made to the process of determining the temperature change value based on the second integral, and this will not be described in detail in the embodiments of the present application.

[0096] For example, Figure 5 FIG. 1 is a schematic diagram of a process for determining brake temperature provided by an exemplary embodiment of the present application. Figure 5As shown, when the vehicle 501 starts, the on-board controller will obtain the first temperature 502 of the brake of the vehicle. When the vehicle 501 enters the braking state for the first time, the on-board controller will determine the temperature rise value (temperature rise value 1) of the brake in the braking state, and the temperature change value (temperature change value 1) of the brake at the time of the first entry into the braking state and the time of the start-up, thereby determining the second temperature 503 of the on-board controller when the first entry into the braking state is determined according to the sum of the first temperature 502, the temperature rise value 1 and the temperature change value 1. When the vehicle 501 enters the braking state for the second time, the on-board controller will determine the temperature rise value (temperature rise value 2) of the brake in the braking state, and the temperature change value (temperature change value 2) of the brake at the time of the second entry into the braking state and the time of the first entry into the braking state, thereby determining the second temperature 505 of the on-board controller when the second entry into the braking state is determined according to the sum of the second temperature 503, the temperature rise value 2 and the temperature change value 2. By looping the above process, the on-board controller can determine the temperature of the brake each time it enters the braking state.

[0097] In some embodiments, the vehicle controller will also predict the error value corresponding to the second temperature through the temperature calibration model according to the brake pressure of the brake in the braking state, the braking time of the brake in the braking state and the second temperature, so as to determine the calibration temperature of the brake as the temperature of the brake in the braking state according to the sum of the error value and the second temperature. Optionally, the temperature calibration model is an AI model, such as a machine learning model built based on NN, and the temperature calibration model is deployed in the vehicle controller. Optionally, the temperature calibration model is trained based on the sample brake pressure of the brake in the braking state, the sample braking time of the brake in the braking state, the sample temperature of the brake in the braking state, and the sample error value. The sample error value is determined according to the difference between the real temperature of the brake in the braking state and the sample temperature. The sample temperature is determined according to the sample brake pressure and the sample braking time. The determination process can refer to the relevant content in the embodiment of the present application, which will not be repeated here. The real temperature of the brake in the braking state is obtained by detecting the temperature of the brake through a temperature sensor when the sample temperature of the brake in the braking state is less than the applicable temperature. The applicable temperature is determined according to the ambient temperature applicable to the temperature sensor. The temperature sensor is arranged at the first end of the telescopic part, and the second end of the telescopic part is connected to the housing of the vehicle, for example, connected to the position in the housing of the vehicle for accommodating the tire of the vehicle, and the first end and the second end are two opposite ends of the telescopic part. When the sample temperature is lower than the applicable temperature, the telescopic part will extend a preset distance in the first direction so that the temperature sensor is close to the brake of the vehicle, so as to collect the real temperature of the brake through the temperature sensor. The first direction is the direction close to the brake of the vehicle. After collecting the real temperature, the telescopic part will shrink a preset distance in the second direction so that the temperature sensor is away from the brake of the vehicle. The second direction is the direction away from the brake of the vehicle.

[0098] Step 308: When the second temperature is greater than the temperature threshold, a prompt message is sent.

[0099] The temperature threshold is determined based on the corresponding relationship between the braking performance of the brake and the brake temperature, for example, the temperature corresponding to the brake when the braking performance of the brake is weaker than the performance threshold. The prompt information includes information related to the performance and / or temperature of the brake.

[0100] Optionally, when the second temperature is greater than the first temperature threshold, the on-board controller will send a first prompt message, such as sending the first prompt message to the on-board display of the vehicle. The first prompt message is used to prompt that the temperature of the brake is abnormal, for example, the content of the first prompt message is "the temperature of the brake is high, pay attention to driving safety". When the second temperature is greater than the second temperature threshold, the on-board controller will send a second prompt message, such as sending the second prompt message to the on-board display of the vehicle. The second prompt message is used to prompt to park the vehicle to reduce the temperature of the brake, for example, the content of the second prompt message is "please stop the car and cool down until the brake cools down. If necessary, sprinkle water on the brake to speed up the cooling". The above-mentioned second temperature threshold is greater than the first temperature threshold.

[0101] In some embodiments, when the second temperature is greater than the second temperature threshold, the onboard controller of the electric vehicle will also limit the vehicle power output of the vehicle, thereby reducing the maximum speed of the vehicle during driving. And / or, the energy recovery (kinetic energy recovery) level of the vehicle is adjusted to the strongest (highest) level to assist the vehicle in compensating a certain braking capacity through the energy recovery mechanism.

[0102] For example, Figure 6 FIG. 1 is a schematic diagram of a process for determining brake temperature provided by an exemplary embodiment of the present application. Figure 6As shown, in step S1, after the vehicle is started, the vehicle air conditioning system will provide the current ambient temperature and the ambient temperature from the last time the vehicle was powered off to the current start-up time, the ECS will provide the brake master cylinder pressure value and the current vehicle speed, the brake pedal sensor will provide the brake stroke signal, and the vehicle-mounted large screen system will provide the current time. In step S2, the ESC calculates the cooling value (temperature change value) generated by the brake after the vehicle is powered off based on the brake temperature value (fourth temperature) calculated at the last time the vehicle was powered off, combined with the integral of the ambient temperature and time from the last time the vehicle was powered off to the current start-up time, and subtracts the two temperature values ​​to obtain the initial temperature value t0 (first temperature) of the brake when the vehicle is started this time. In step S3, when there is a braking signal during the vehicle's driving process, the ESC calculates the temperature rise value t' (temperature rise value) generated by the brake during braking based on the integral of the brake master cylinder pressure and duration, combined with the current ambient temperature and vehicle speed as compensation, and superimposes it with the initial temperature value of the brake to obtain the current brake temperature t (second temperature). In step S4, when the brake temperature reaches the alarm threshold t1 (the first temperature threshold), the ESC sends an alarm signal to the on-board large screen system to remind the driver that the brake temperature is high and to pay attention to driving safety. In step S5, when the brake temperature reaches the fault threshold t2 (the second temperature threshold), the ESC sends a fault signal to the on-board large screen system and the vehicle control unit (VCU). The on-board large screen reminds the driver to stop the car to cool down and reminds the precautions for brake cooling. At the same time, the VCU limits the power output of the vehicle, reduces the maximum driving speed, and actively adjusts the energy recovery level to the strongest gear to assist in compensating the braking capacity. In step S6, the ESC memorizes the currently calculated brake temperature value when the vehicle is powered off.

[0103] In summary, the method provided in this embodiment can determine the temperature rise value of the brake according to the braking parameters of the brake in the braking state when the vehicle enters the braking state during driving, and can determine the second temperature of the brake in the braking state in combination with the first temperature of the brake when the vehicle is started this time. Since the process of determining the second temperature of the brake does not need to rely on the temperature sensor set on the brake, it is possible to accurately determine the current temperature of the brake at any temperature of the brake, thereby improving the reliability of determining the temperature of the brake.

[0104] The method provided in this embodiment also calculates the integral of the braking pressure and the braking duration, and thereby determines the temperature rise value of the brake. Since the braking pressure and the braking duration are related to the temperature rise of the brake during braking, the temperature rise value of the brake can be accurately determined. The influence coefficient corresponding to the temperature rise value is determined according to the ambient temperature and the vehicle speed during braking, so as to calibrate the temperature rise value. Since the vehicle speed and the ambient temperature during braking are related to the temperature rise of the brake during braking, the temperature rise value of the brake can be accurately calibrated. By determining the first temperature of the brake according to the temperature of the vehicle's brake at the time of stopping, and the temperature change value of the brake between the time of stopping and the time of starting, the temperature of the brake when the vehicle is started can be accurately determined.

[0105] It should be noted that before collecting relevant data of users and during the process of collecting relevant data of users, this application can display a prompt interface, pop-up window or output voice prompt information, and the prompt interface, pop-up window or voice prompt information is used to prompt the user that its relevant data is currently being collected, so that this application only starts to execute the relevant steps of obtaining relevant data of users after obtaining the confirmation operation issued by the user to the prompt interface or pop-up window, otherwise (that is, when the confirmation operation issued by the user to the prompt interface or pop-up window is not obtained), the relevant steps of obtaining relevant data of users are terminated, that is, the relevant data of users are not obtained. In other words, all user data collected by this application are collected with the consent and authorization of the user, and the collection, use and processing of relevant user data need to comply with the relevant laws, regulations and standards of relevant countries and regions.

[0106] It should be noted that the sequence of the method steps provided in the embodiments of the present application can be appropriately adjusted, and the steps can be increased or decreased accordingly according to the circumstances. Any technician familiar with the technical field can easily think of the changed methods within the technical scope disclosed in the present application, and they should be included in the protection scope of the present application, so they will not be repeated here.

[0107] Figure 7 FIG. 1 is a schematic diagram of a structure of a device for determining brake temperature provided by an exemplary embodiment of the present application. Figure 7 As shown, the device comprises:

[0108] An acquisition module 701 is used to acquire a first temperature of a brake of the vehicle when the vehicle is started;

[0109] A determination module 702, configured to determine a temperature rise value of the brake according to a braking parameter of the brake in a braking state when the brake is in a braking state during the driving of the vehicle;

[0110] The determination module 702 is further configured to determine a second temperature of the brake according to the first temperature and the temperature rise value.

[0111] In an optional design, the braking parameter includes at least one of a braking pressure and a braking duration; the determining module 702 is used to:

[0112] calculating a first integral of the braking pressure to the braking duration, wherein the braking duration is a duration during which the brake is in the braking state;

[0113] A temperature increase value of the brake is determined according to the first integral.

[0114] In an optional design, the determining module 702 is used to:

[0115] determining a temperature rise value of the brake according to the first integral through a first mapping table;

[0116] The first mapping table includes the corresponding relationship between different integrals and different temperature rise values, and the different integrals include the integrals of different braking pressures for different braking durations.

[0117] In an optional design, the determining module 702 is used to:

[0118] determining an influence coefficient corresponding to the temperature rise value according to a first ambient temperature when the brake is in the braking state and a speed of the vehicle;

[0119] A calibrated temperature rise value of the brake is determined according to the temperature rise value and the influence coefficient.

[0120] In an optional design, the determining module 702 is used to:

[0121] When the brake enters the braking state for the first time after the vehicle is started, determining a second temperature of the brake according to the sum of the first temperature and the temperature rise value;

[0122] When the brake enters the braking state for the i-th time after the vehicle is started, determining the second temperature of the brake according to the third temperature and the temperature rise value;

[0123] The third temperature is the temperature of the brake when the brake enters the braking state for the (i-1)th time, the third temperature is determined based on the first temperature, and i is a positive integer greater than 1.

[0124] In an optional design, the acquisition module 701 is used to:

[0125] When the vehicle is started, obtaining a fourth temperature, the fourth temperature being the temperature of the brake of the vehicle at a stop time, the stop time being the time when the vehicle stops running most recently before starting;

[0126] Determine the temperature change value of the brake between the stop time and the start time by calculating a second integral of the second ambient temperature between the stop time and the start time to the parking time, wherein the parking time is the time between the stop time and the start time, and the start time is the time when the vehicle starts;

[0127] A first temperature of the brake is determined according to the sum of the fourth temperature and the temperature change value.

[0128] In an alternative design, such as Figure 8 As shown, the device also includes:

[0129] A sending module 703 is used to send a first prompt message when the second temperature is greater than a first temperature threshold, wherein the first prompt message is used to prompt that the temperature of the brake is abnormal;

[0130] The sending module 703 is further configured to send a second prompt message when the second temperature is greater than a second temperature threshold, wherein the second prompt message is configured to prompt the user to park the vehicle to reduce the temperature of the brake;

[0131] The second temperature threshold is greater than the first temperature threshold.

[0132] It should be noted that: the device for determining the brake temperature provided in the above embodiment is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the device for determining the brake temperature provided in the above embodiment and the embodiment of the method for determining the brake temperature belong to the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0133] An embodiment of the present application also provides a computer device, which includes: a processor and a memory, wherein at least one program is stored in the memory; the processor is used to execute at least one program in the memory to implement the method for determining the brake temperature provided in the above-mentioned method embodiments.

[0134] Fig. 9 900 is a block diagram of a computer device provided by an exemplary embodiment of the present application. In some embodiments, the computer device is implemented as a vehicle-mounted controller. Generally, the computer device 900 includes: a processor 901 and a memory 902.

[0135] The processor 901 may include one or more processing cores, such as a 4-core processor, a 9-core processor, etc. The processor 901 may be implemented in at least one hardware form of digital signal processing (DSP), field programmable gate array (FPGA), and programmable logic array (PLA). The processor 901 may also include a main processor and a coprocessor. The main processor is a processor for processing data in an awake state, also known as a central processing unit (CPU); the coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 901 may include a graphics processing unit (GPU), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 901 may also include an artificial intelligence (AI) processor, which is used to process computing operations related to machine learning.

[0136] The memory 902 may include one or more computer-readable storage media, which may be non-transitory. The memory 902 may also include a high-speed random access memory and a non-volatile memory, such as one or more disk storage devices and flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 902 is used to store at least one instruction, which is used to be executed by the processor 901 to implement the method for determining the brake temperature provided in the method embodiment of the present application.

[0137] In some embodiments, the computer device 900 may further optionally include: an input interface 903 and an output interface 904. The processor 901, the memory 902 and the input interface 903 and the output interface 904 may be connected via a bus or a signal line. Each peripheral device may be connected to the input interface 903 and the output interface 904 via a bus, a signal line or a circuit board. The input interface 903 and the output interface 904 may be used to connect at least one peripheral device related to input / output to the processor 901 and the memory 902.

[0138] In some embodiments, the processor 901, the memory 902, the input interface 903, and the output interface 904 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 901, the memory 902, the input interface 903, and the output interface 904 can be implemented on a separate chip or circuit board, which is not limited to the embodiments of the present application.

[0139] Those skilled in the art will appreciate that the structure shown above does not constitute a limitation on the computer device 900 , and may include more or fewer components than shown in the figure, or combine certain components, or adopt a different component arrangement.

[0140] In an exemplary embodiment, a chip is also provided. The chip includes a programmable logic circuit and / or program instructions. When the chip runs on a computer device 900, it is used to implement the method for determining the brake temperature provided in the method embodiment of the present application.

[0141] In an exemplary embodiment, a computer-readable storage medium is also provided, in which at least one program is stored. The at least one program is loaded and executed by a processor to implement the method for determining the brake temperature provided in the method embodiment of the present application.

[0142] In an exemplary embodiment, a computer program product is also provided, which includes computer instructions stored in a computer-readable storage medium. A processor obtains the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to implement the method for determining the brake temperature provided in the method embodiment of the present application.

[0143] A person of ordinary skill in the art will appreciate that all or part of the steps to implement the above embodiments may be accomplished by hardware, or may be accomplished by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned computer-readable storage medium may be a read-only memory, a disk, or an optical disk, etc.

[0144] Those skilled in the art should be aware that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented with hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable storage medium or transmitted as one or more instructions or codes on a computer-readable storage medium. Computer-readable storage media include computer storage media and communication media, wherein the communication media include any media that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that a general or special-purpose computer can access.

[0145] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for determining brake temperature, characterized in that: The method comprises: When the vehicle is started, obtaining a first temperature of a brake of the vehicle; During the driving of the vehicle, when the brake is in a braking state, determining a temperature rise value of the brake according to a braking parameter of the brake in the braking state; A second temperature of the brake is determined according to the first temperature and the temperature increase value.

2. The method according to claim 1, characterized in that The braking parameter includes at least one of braking pressure and braking duration; Determining the temperature rise value of the brake according to the braking parameters of the brake in the braking state includes: calculating a first integral of the braking pressure to the braking duration, wherein the braking duration is a duration during which the brake is in the braking state; A temperature increase value of the brake is determined according to the first integral.

3. The method according to claim 2, characterized in that The step of determining the temperature rise value of the brake according to the first integral includes: determining a temperature rise value of the brake according to the first integral through a first mapping table; The first mapping table includes the corresponding relationship between different integrals and different temperature rise values, and the different integrals include the integrals of different braking pressures for different braking durations.

4. The method according to claim 2, characterized in that: The method further comprises: determining an influence coefficient corresponding to the temperature rise value according to a first ambient temperature when the brake is in the braking state and a speed of the vehicle; A calibrated temperature rise value of the brake is determined according to the temperature rise value and the influence coefficient.

5. The method according to any one of claims 1 to 4, characterized in that: The step of determining the second temperature of the brake according to the first temperature and the temperature rise value comprises: When the brake enters the braking state for the first time after the vehicle is started, determining a second temperature of the brake according to the sum of the first temperature and the temperature rise value; When the brake enters the braking state for the i-th time after the vehicle is started, determining the second temperature of the brake according to the third temperature and the temperature rise value; The third temperature is the temperature of the brake when the brake enters the braking state for the (i-1)th time, the third temperature is determined based on the first temperature, and i is a positive integer greater than 1.

6. The method according to any one of claims 1 to 4, characterized in that: When the vehicle is started, obtaining a first temperature of a brake of the vehicle includes: When the vehicle is started, obtaining a fourth temperature, the fourth temperature being the temperature of the brake of the vehicle at a stop time, the stop time being the time when the vehicle stops running most recently before starting; Determine the temperature change value of the brake between the stop time and the start time by calculating a second integral of the second ambient temperature between the stop time and the start time to the parking time, wherein the parking time is the time between the stop time and the start time, and the start time is the time when the vehicle starts; A first temperature of the brake is determined according to the sum of the fourth temperature and the temperature change value.

7. A device for determining brake temperature, characterized in that: The device comprises: an acquisition module, configured to acquire a first temperature of a brake of the vehicle when the vehicle is started; a determination module, configured to determine, during the driving process of the vehicle, when the brake is in a braking state, a temperature rise value of the brake according to a braking parameter of the brake in the braking state; The determination module is further configured to determine a second temperature of the brake according to the first temperature and the temperature rise value.

8. A computer device, characterized in that: The computer device comprises: a processor and a memory, wherein at least one program is stored in the memory; the processor is used to execute the at least one program in the memory to implement the method for determining the brake temperature as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one program, and the at least one program is loaded and executed by the processor to implement the method for determining the brake temperature as described in any one of claims 1 to 6.

10. A computer program product, characterized in that The computer program product includes computer instructions, which are stored in a computer-readable storage medium. A processor obtains the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to implement the method for determining the brake temperature as described in any one of claims 1 to 6.

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