CN116749935A - Thermal control method and device for vehicle braking, vehicle and storage medium - Google Patents

Thermal control method and device for vehicle braking, vehicle and storage medium Download PDF

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Publication number
CN116749935A
CN116749935A CN202310671354.8A CN202310671354A CN116749935A CN 116749935 A CN116749935 A CN 116749935A CN 202310671354 A CN202310671354 A CN 202310671354A CN 116749935 A CN116749935 A CN 116749935A
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China
Prior art keywords
gradient
vehicle
braking
current
interval
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Pending
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CN202310671354.8A
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Chinese (zh)
Inventor
崔继波
李�浩
刘海迪
赵辉
张克谦
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Feige Intelligent Technology Co ltd
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Feige Intelligent Technology Co ltd
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Priority to CN202310671354.8A priority Critical patent/CN116749935A/en
Publication of CN116749935A publication Critical patent/CN116749935A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2210/00—Detection or estimation of road or environment conditions; Detection or estimation of road shapes
    • B60T2210/10—Detection or estimation of road conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

The application provides a thermal control method and device for vehicle braking, a vehicle and a storage medium, wherein the method is applied to the vehicle and comprises the following steps: detecting whether the vehicle meets the active heat control condition of the electric control braking system or not; if the vehicle meets the active heat control condition of the electric control braking system, acquiring the parking gradient of the vehicle, and calculating according to the parking gradient to obtain the optimal braking current meeting the heating value control requirement of the electric control braking system; and outputting braking force by using the optimal braking current to control the electric control braking system. According to the method, after the vehicle is stationary for a period of time, the gradient of the vehicle can be judged, braking force is output according to the gradient grade, and the overlarge braking force is prevented from being output due to overlarge input, so that the heating value of a controller and a motor is reduced, the working temperature of the system is reduced, and the system is prevented from entering a degradation mode.

Description

Thermal control method and device for vehicle braking, vehicle and storage medium
Technical Field
The present application relates to the field of vehicles, and more particularly, to a thermal control method of vehicle braking, a device, a vehicle, and a storage medium in the field of vehicles.
Background
The traditional motor driving system constant torque locked-rotor protection method mainly adopts control strategy adjustment aiming at locked-rotor after occurrence. For example, after the motor is blocked, the electromagnetic torque is actively controlled to be reduced: and after the motor is blocked, temperature detection is carried out on a power electronic power device in the electric drive controller, several temperature thresholds are set, and degradation or shutdown is carried out when the temperature thresholds are reached.
The existing 2-Box and 1-Box controllers are controlled by braking current following a brake pedal, and the controller and a motor are easy to overheat under the parking working condition, so that the controller enters a degradation mode, and a power module with high specification and a larger radiating fin are required to be selected in order to avoid the controller from frequently entering the degradation mode.
The existing controller drives the permanent magnet synchronous motor by using the power module, the temperature sensor is adopted in the controller to sample the temperature of the power module, the pressure sensor is adopted in the controller to collect the braking pressure, the system clamping force is input into the stroke of the braking pedal, and the braking pressure cannot be adjusted according to the parking gradient. If the vehicle is parked under high pressure for a long time, the power consumption of the storage battery of the whole vehicle is serious, and the controller and the driving motor are heated seriously, so that the degradation of a braking system is easy to cause, and a driving chip with high specification and a complex heat dissipation system are needed to avoid the degradation of the system.
Disclosure of Invention
The application provides a thermal control method, a device, a vehicle and a storage medium for vehicle braking, wherein the method can judge the gradient of the vehicle after the vehicle is stationary for a certain period of time, and output braking force according to the gradient grade, so that the excessive input and the excessive output of the braking force are avoided, the heating values of a controller and a motor are reduced, the working temperature of the system is reduced, and the system is prevented from entering a degradation mode.
In a first aspect, a method for thermally controlling vehicle braking is provided, the method comprising: detecting whether the vehicle meets the active heat control condition of the electric control braking system or not; if the vehicle meets the active heat control condition of the electric control braking system, acquiring the parking gradient of the vehicle, and calculating according to the parking gradient to obtain the optimal braking current meeting the heating value control requirement of the electric control braking system; and controlling the electric control braking system to output braking force by utilizing the optimal braking current.
According to the technical scheme, under the condition that the vehicle meets the active heat control condition of the electric control system, the optimal braking current meeting the heating value control requirement of the electric control braking system can be calculated according to the parking gradient of the vehicle, the electric control braking system is controlled to output corresponding braking force, the serious heating problem of the controller is reduced, the heating values of the controller and the motor are reduced, the working temperature of the system is reduced, and the system is prevented from entering a degradation mode.
With reference to the first aspect, in some possible implementations, the calculating, according to the parking gradient, an optimal braking current that meets a heating value control requirement of the electric control braking system includes: dividing the gradient into a plurality of gradient sections; identifying a gradient section in which the parking gradient is located; and determining optimal braking current according to the gradient interval and the braking current corresponding to the braking pedal stroke.
Through the technical scheme, the optimal braking current can be determined according to the gradient interval where the vehicle is located and the braking current corresponding to the braking pedal stroke, so that the working current of the braking current reducing system is reduced, the temperatures of the controller and the motor system are reduced, and the available working time range of the system is improved.
With reference to the first aspect and the foregoing implementation manners, in some possible implementation manners, the gradient interval includes first to third gradient intervals, where a maximum gradient of the first gradient interval is smaller than a minimum gradient of the second gradient interval, and a maximum gradient of the second gradient interval is smaller than a minimum gradient of the third gradient interval.
With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, the determining an optimal braking current according to the braking current corresponding to the gradient interval and the brake pedal stroke includes: if the gradient interval is the first gradient interval, acquiring braking current corresponding to a brake pedal stroke, and taking the smaller one of the braking current corresponding to the brake pedal stroke and the braking current corresponding to the maximum gradient of the first gradient interval as the optimal braking current; and if the gradient interval is the second gradient interval and the third gradient interval, acquiring braking current corresponding to a brake pedal stroke, and taking the smaller one of the braking current corresponding to the brake pedal stroke and the braking current corresponding to the parking gradient as the optimal braking current.
Through the technical scheme, corresponding optimal braking current can be output according to different gradient intervals, and overlarge braking force is prevented from being output due to overlarge input, so that the heating value of a controller and a motor is reduced, and the working temperature of a system is reduced.
With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, after the outputting of the braking force by the electronically controlled braking system with the optimal braking current, the method further includes: and if the gradient interval is the third gradient interval, generating preset prompt information, and carrying out high gradient prompt by using the preset prompt information.
Through the technical scheme, when the gradient of the vehicle is in the third gradient interval, the preset prompt information is generated to warn the user, so that the user is prompted that the current vehicle is in a high gradient, and safety is noted.
With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, the detecting whether the vehicle meets an active thermal control condition of the electronically controlled brake system includes: acquiring the current speed of the vehicle; when the current vehicle speed is smaller than or equal to a preset vehicle speed, judging that the vehicle is in a stationary state, and detecting the duration of the vehicle in the stationary state; and when the duration time is longer than the preset time, judging that the vehicle meets the active heat control condition of the electric control braking system, otherwise, judging that the vehicle does not meet the active heat control condition of the electric control braking system.
Through the technical scheme, after the vehicle is stationary for a preset time, the vehicle can be judged to meet the active heat control condition of the electric control braking system.
With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, the acquiring a parking gradient of the vehicle includes: acquiring a longitudinal acceleration of the vehicle; and calculating the parking gradient of the vehicle according to the longitudinal acceleration.
Through the technical scheme, the parking gradient of the whole vehicle can be calculated according to the longitudinal acceleration of the vehicle, so that the braking force required by the vehicle can be calculated subsequently.
In a second aspect, there is provided a thermal control device for vehicle braking, the device comprising: the detection module is used for detecting whether the vehicle meets the active heat control condition of the electric control braking system or not; the calculation module is used for acquiring the parking gradient of the vehicle if the vehicle meets the active heat control condition of the electric control braking system, and calculating according to the parking gradient to obtain the optimal braking current meeting the heating value control requirement of the electric control braking system; and the control module is used for controlling the electric control braking system to output braking force by utilizing the optimal braking current.
With reference to the second aspect, in some possible implementations, the computing module is further configured to: dividing the gradient into a plurality of gradient sections; identifying a gradient section in which the parking gradient is located; and determining optimal braking current according to the gradient interval and the braking current corresponding to the braking pedal stroke.
With reference to the second aspect and the foregoing implementation manners, in some possible implementation manners, the gradient interval includes first to third gradient intervals, where a maximum gradient of the first gradient interval is smaller than a minimum gradient of the second gradient interval, and a maximum gradient of the second gradient interval is smaller than a minimum gradient of the third gradient interval.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the computing module is further configured to obtain a braking current corresponding to a brake pedal stroke if the gradient interval is the first gradient interval, and use a smaller one of the braking current corresponding to the brake pedal stroke and a braking current corresponding to a maximum gradient of the first gradient interval as the optimal braking current; and if the gradient interval is the second gradient interval and the third gradient interval, acquiring braking current corresponding to a brake pedal stroke, and taking the smaller one of the braking current corresponding to the brake pedal stroke and the braking current corresponding to the parking gradient as the optimal braking current.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the method further includes: and the prompt module is used for generating preset prompt information if the gradient interval is the third gradient interval after the optimal braking current is used for controlling the electric control braking system to output braking force, and carrying out high-gradient prompt by using the preset prompt information.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the detection module is further configured to: acquiring the current speed of the vehicle; when the current vehicle speed is smaller than or equal to a preset vehicle speed, judging that the vehicle is in a stationary state, and detecting the duration of the vehicle in the stationary state; and when the duration time is longer than the preset time, judging that the vehicle meets the active heat control condition of the electric control braking system, otherwise, judging that the vehicle does not meet the active heat control condition of the electric control braking system.
With reference to the second aspect and the foregoing implementation manners, in some possible implementation manners, the computing module is further configured to obtain a longitudinal acceleration of the vehicle; and calculating the parking gradient of the vehicle according to the longitudinal acceleration.
In a third aspect, there is provided a vehicle comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the method of the first aspect or any one of the possible implementation manners of the first aspect.
In a fourth aspect, a computer readable storage medium is provided, the computer readable storage medium storing computer program code which, when run on a computer, causes the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect.
Drawings
FIG. 1 is a flow chart of a thermal control method for vehicle braking provided by an embodiment of the present application;
FIG. 2 is a schematic diagram of data required for calculation by a sensor in a vehicle according to an embodiment of the present application;
fig. 3 is a schematic diagram of a thermal control device for vehicle braking according to an embodiment of the present application.
Detailed Description
The technical scheme of the application will be clearly and thoroughly described below with reference to the accompanying drawings. Wherein, in the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B: the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: the three cases where a exists alone, a and B exist together, and B exists alone, and furthermore, in the description of the embodiments of the present application, "plural" means two or more than two.
The terms "first," "second," and the like, are used below for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
The traditional motor driving system constant torque locked-rotor protection method mainly adopts control strategy adjustment aiming at locked-rotor after occurrence. For example, after the motor is blocked, the electromagnetic torque is actively controlled to be reduced: and after the motor is blocked, temperature detection is carried out on a power electronic power device in the electric drive controller, several temperature thresholds are set, and degradation or shutdown is carried out when the temperature thresholds are reached. The existing 2-Box and 1-Box controllers are controlled by braking current following a brake pedal, and the controller and a motor are easy to overheat under the parking working condition, so that the controller enters a degradation mode, and a power module with high specification and a larger radiating fin are required to be selected in order to avoid the controller from frequently entering the degradation mode.
The existing controller drives the permanent magnet synchronous motor by using the power module, the temperature sensor is adopted in the controller to sample the temperature of the power module, the pressure sensor is adopted in the controller to collect the braking pressure, the system clamping force is input into the stroke of the braking pedal, and the braking pressure cannot be adjusted according to the parking gradient. If the vehicle is parked under high pressure for a long time, the power consumption of the storage battery of the whole vehicle is serious, and the controller and the driving motor are heated seriously, so that the degradation of a braking system is easy to cause, and a driving chip with high specification and a complex heat dissipation system are needed to avoid the degradation of the system.
The application scenario or system architecture of the embodiment of the present application will be described.
In general, the thermal control method for vehicle braking in the embodiment of the application is mainly suitable for vehicles equipped with 2-Box, 1-Box and EMB (Electro Mechanical Brake, electronic mechanical brake system), reduces severe heating of the controller, and avoids the problem that the system enters a degradation mode.
Fig. 1 is a schematic flow chart of a thermal control method for vehicle braking according to an embodiment of the present application.
Illustratively, as shown in FIG. 1, the method includes:
step S101, detecting whether the vehicle satisfies an active thermal control condition of the electric control brake system.
Wherein, whether detect the vehicle and satisfy the initiative thermal control condition of automatically controlled braking system, include: acquiring the current speed of the vehicle; when the current vehicle speed is smaller than or equal to the preset vehicle speed, judging that the vehicle is in a stationary state, and detecting the duration of the stationary state of the vehicle; and when the duration time is longer than the preset time, judging that the vehicle meets the active heat control condition of the electric control braking system, otherwise, judging that the vehicle does not meet the active heat control condition of the electric control braking system.
The preset vehicle speed may be set to 0, and the preset time period may be set according to specific situations, for example, 5min or 6min, and the comparison is not limited specifically.
It will be appreciated that when the current vehicle speed is less than the preset vehicle speed, indicating that the vehicle is stationary, and if stationary for a preset period of time, the electronic control system controlling the vehicle enters an active thermal control mode.
Step S102, if the vehicle meets the active heat control condition of the electric control braking system, the parking gradient of the vehicle is obtained, and the optimal braking current meeting the heating value control requirement of the electric control braking system is obtained according to the parking gradient.
It can be understood that the embodiment of the application can obtain the parking gradient of the vehicle under the condition that the vehicle meets the active heat control condition of the electric control system, and calculate the optimal braking current meeting the heating value control requirement of the electric control braking system according to the parking gradient.
In an embodiment of the application, acquiring a parking gradient of a vehicle comprises; acquiring longitudinal acceleration of the vehicle; and calculating the parking gradient of the vehicle according to the longitudinal acceleration.
It CAN be understood that the parking gradient of the vehicle CAN be obtained by calculating the parking gradient of the vehicle according to the longitudinal acceleration of the vehicle, specifically, the whole vehicle CAN be provided by CAN (Controller Area Network )/CANFD (CAN with Flexible Data rate) or the acceleration sensor of the system CAN obtain the whole vehicle gradient, and the proper motor working current is output according to the system.
In the embodiment of the application, the optimal braking current meeting the heating value control requirement of the electric control braking system is obtained according to the parking gradient calculation, and the method comprises the following steps: dividing the gradient into a plurality of gradient sections; identifying a gradient section in which a parking gradient is located; and determining the optimal braking current according to the braking current corresponding to the gradient interval and the braking pedal stroke.
It can be appreciated that the embodiment of the application can divide the gradient into a plurality of gradient sections, and determine the optimal braking current according to the gradient section where the parking gradient of the vehicle is located and the braking current corresponding to the stroke of the brake pedal.
The gradient interval comprises first to third gradient intervals, wherein the maximum gradient of the first gradient interval is smaller than the minimum gradient of the second gradient interval, and the maximum gradient of the second gradient interval is smaller than the minimum gradient of the third gradient interval.
It should be noted that the gradient value of the gradient interval may be set according to the specific situation, and is not limited thereto, for example, the first gradient interval may be set to have a gradient of <15%, the second gradient interval may be set to have a gradient of >15% and <30%, and the third gradient interval may be set to have a gradient of >30%.
In an embodiment of the present application, determining an optimal braking current according to a braking current corresponding to a gradient interval and a brake pedal stroke includes: if the gradient interval is a first gradient interval, acquiring braking current corresponding to the stroke of the brake pedal, and taking the smaller one of the braking current corresponding to the stroke of the brake pedal and the braking current corresponding to the maximum gradient of the first gradient interval as the optimal braking current; and if the gradient interval is the second gradient interval and the third gradient interval, acquiring the braking current corresponding to the brake pedal stroke, and taking the smaller one of the braking current corresponding to the brake pedal stroke and the braking current corresponding to the parking gradient as the optimal braking current.
Wherein, the ECU (Electronic Control Unit ) of the vehicle judges the state of the brake pedal through collecting the pedal position sensor in the embodiment of the application.
It may be understood that in the embodiment of the present application, the optimal braking current may be calculated according to different gradient intervals, and the division of gradient intervals may be performed according to specific situations, which is not limited, for example, the first gradient interval may be divided into a gradient less than 15%, the second gradient interval may be divided into a gradient between 15% and 30%, and the third gradient interval may be divided into a gradient greater than 30%.
Specifically, if the gradient interval is a first gradient interval, comparing the pedal stroke with the smaller of the braking currents corresponding to the maximum gradient of the first gradient interval and the maximum gradient of the first gradient interval, if the braking current corresponding to the pedal stroke is smaller than the maximum demand current of the first gradient interval, taking the braking current corresponding to the pedal stroke as the optimal braking current, and if the braking current corresponding to the pedal stroke is larger than the maximum demand current of the first gradient interval, taking the braking current corresponding to the maximum gradient of the first gradient interval as the optimal braking current; and if the gradient interval is the second gradient interval and the third gradient interval, comparing the smaller one of the braking current corresponding to the stroke of the brake pedal and the braking current corresponding to the parking gradient of the current vehicle as the optimal braking current.
Step S103, utilizing the optimal braking current to control the electric control braking system to output braking force.
The embodiment of the application controls the electric control braking system to output braking force based on the calculated optimal braking current, and avoids the system to output excessive braking force, thereby reducing the heating value of the controller and the motor and reducing the working temperature of the system.
In the embodiment of the application, after the optimal braking current is utilized to control the electric control braking system to output braking force, the method further comprises the following steps: if the gradient section is the third gradient section, generating preset prompt information, and carrying out high gradient prompt by using the preset prompt information.
The preset prompt message is used for prompting that the gradient of the whole vehicle is too high.
It can be understood that when the parking stopping gradient of the vehicle is in the third gradient interval, the embodiment of the application generates the preset prompting information for prompting that the gradient of the whole vehicle is too high, for example, the method can send out alarm information to the whole vehicle.
Specifically, the thermal control method for vehicle braking according to the embodiment of the application can be divided into two parts:
a first part: it is determined whether the vehicle can enter an active thermal control mode.
A second part: the vehicle is started, enters an active thermal control mode, and the cycle begins.
Step 1: judging the running state of the vehicle, and collecting the speed and the longitudinal acceleration of the vehicle;
step 2: if the brake system works normally and has no fault, the controller is in a standard working mode;
step 3: judging the vehicle speed resting time, if the vehicle speed resting time is greater than 300S, and enabling the system to enter an active heat control mode;
step 4: the parking stopping gradient of the vehicle is less than 15%, the pedal stroke and the braking force current provided by the system are compared, and if the corresponding current of the pedal stroke is less than 15% of the maximum gradient required current of the system, the control system executes according to the corresponding current of the pedal stroke; if the corresponding current of the pedal stroke is greater than the 15% gradient maximum required current of the system, the system works according to the 15% gradient corresponding current;
step 5: the parking stopping gradient of the vehicle is more than 15% and less than 30%, the pedal stroke and the braking force current provided by the system are compared, and if the corresponding current of the pedal stroke is less than the current required by the current parking gradient maximum current system, the control system executes according to the corresponding current of the pedal stroke; if the current corresponding to the pedal stroke is greater than the current maximum demand current of the current parking gradient of the system, the system works according to the current corresponding to the current gradient, and the braking force required by the system is calculated according to the gradient of the vehicle;
step 6: the parking stopping gradient of the vehicle is more than 30%, the pedal stroke and the braking force current provided by the system are compared, and if the corresponding current of the pedal stroke is less than the current of the current parking gradient maximum demand current system of the system, the control system executes according to the corresponding current of the pedal stroke; if the current corresponding to the pedal stroke is greater than the current required by the current parking gradient of the system, the system works according to the current gradient, the system calculates the required braking force according to the gradient of the vehicle, and meanwhile, alarm information is sent to the whole vehicle to prompt the warning of the high gradient of the whole vehicle.
In summary, in the thermal control method for vehicle braking, in the dynamic braking process of the electric control system, the controller controls according to the pedal travel or the braking deceleration given by the whole vehicle VCU (Vehicle Control Unit, the whole vehicle controller), in the braking process of the vehicle in a stop state, the controller controls according to the pedal travel, judges the gradient of the vehicle after the working delay exceeds a certain time length, outputs braking force according to the gradient grade, and avoids the overlarge input of the overlarge braking force, thereby reducing the heating value of the controller and the motor and the working temperature of the system, that is, the embodiment of the application calculates the braking force required by the vehicle by utilizing the longitudinal acceleration signal provided by the vehicle attitude sensor, adjusts the braking current, reduces the working current of the system, reduces the temperature of the controller and the motor system on the basis of meeting the vehicle braking, and improves the available working time range of the system and the working time of the system under severe working conditions. In particular, the embodiment of the application judges the state of the pedal by using the pedal sensor, calculates the parking gradient of the vehicle by using the voltage and the longitudinal acceleration, and realizes the control of the electric control system as shown in figure 2.
According to the thermal control method for vehicle braking, disclosed by the embodiment of the application, under the condition that the vehicle meets the active thermal control condition of the electric control system, the optimal braking current meeting the heating value control requirement of the electric control braking system can be calculated according to the parking gradient of the vehicle, the electric control braking system is controlled to output corresponding braking force, the serious heating problem of the controller is reduced, the heating values of the controller and the motor are reduced, the working temperature of the system is reduced, and the system is prevented from entering a degradation mode.
Fig. 3 is a schematic structural diagram of a thermal control device for vehicle braking according to an embodiment of the present application.
For example, as shown in fig. 3, the apparatus 10 may include: a detection module 100, a calculation module 200 and a control module 300.
The detection module 100: the system comprises a control unit, a control unit and a control unit, wherein the control unit is used for detecting whether a vehicle meets an active heat control condition of an electric control brake system;
the calculation module 200: the method comprises the steps that when a vehicle meets the active heat control condition of an electric control braking system, the parking gradient of the vehicle is obtained, and the optimal braking current meeting the heating value control requirement of the electric control braking system is obtained through calculation according to the parking gradient;
the controller module 300: the method is used for controlling the electric control braking system to output braking force by utilizing the optimal braking current.
In an embodiment of the present application, the computing module 200 is further configured to: dividing the gradient into a plurality of gradient sections; identifying a gradient section in which a parking gradient is located; and determining the optimal braking current according to the braking current corresponding to the gradient interval and the braking pedal stroke.
In an embodiment of the present application, the gradient sections include first to third gradient sections, wherein a maximum gradient of the first gradient section is smaller than a minimum gradient of the second gradient section, and a maximum gradient of the second gradient section is smaller than a minimum gradient of the third gradient section.
In an embodiment of the present application, the computing module 200 is further configured to: if the gradient interval is a first gradient interval, acquiring braking current corresponding to the stroke of the brake pedal, and taking the smaller one of the braking current corresponding to the stroke of the brake pedal and the braking current corresponding to the maximum gradient of the first gradient interval as the optimal braking current; and if the gradient interval is the second gradient interval and the third gradient interval, acquiring the braking current corresponding to the braking pedal stroke, and taking the smaller one of the braking current corresponding to the braking pedal stroke and the braking current corresponding to the parking gradient as the optimal braking current.
In the embodiment of the present application, the apparatus 10 of the embodiment of the present application further includes: and a prompt module.
The prompt module is used for generating preset prompt information if the gradient interval is a third gradient interval after the optimal braking current is utilized to control the electric control braking system to output braking force, and carrying out high gradient prompt by utilizing the preset prompt information.
In an embodiment of the present application, the detection module 100 is further configured to: acquiring the current speed of the vehicle; when the current vehicle speed is smaller than or equal to the preset vehicle speed, judging that the vehicle is in a stationary state, and detecting the duration of the stationary state of the vehicle; and when the duration time is longer than the preset time, judging that the vehicle meets the active heat control condition of the electric control braking system, otherwise, judging that the vehicle does not meet the active heat control condition of the electric control braking system.
In an embodiment of the present application, the calculation module 200 is further configured to acquire a longitudinal acceleration of the vehicle; and calculating the parking gradient of the vehicle according to the longitudinal acceleration.
In addition, the embodiment of the application also protects a vehicle, which can comprise a memory and a processor, wherein executable program codes are stored in the memory, and the processor is used for calling and executing the executable program codes to execute the thermal control method for the vehicle braking provided by the embodiment of the application.
The present embodiment also provides a computer-readable storage medium having stored therein computer program code which, when run on a computer, causes the computer to perform the above-mentioned related method steps to implement a thermal control method for vehicle braking as provided in the above-mentioned embodiments.
The apparatus, the computer readable storage medium, or the chip provided in this embodiment are used to execute the corresponding methods provided above, so that the beneficial effects achieved by the apparatus, the computer readable storage medium, or the chip can refer to the beneficial effects in the corresponding methods provided above, and are not described herein.
It will be appreciated by those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (10)

1. A method of thermally controlling vehicle braking, the method comprising:
detecting whether the vehicle meets the active heat control condition of the electric control braking system or not;
if the vehicle meets the active heat control condition of the electric control braking system, acquiring the parking gradient of the vehicle, and calculating according to the parking gradient to obtain the optimal braking current meeting the heating value control requirement of the electric control braking system;
and controlling the electric control braking system to output braking force by utilizing the optimal braking current.
2. The method of claim 1, wherein the calculating an optimal brake current to meet the electric brake system heating control demand based on the parking grade comprises:
dividing the gradient into a plurality of gradient sections;
identifying a gradient section in which the parking gradient is located;
and determining optimal braking current according to the gradient interval and the braking current corresponding to the braking pedal stroke.
3. The method of claim 2, wherein the gradient intervals include first through third gradient intervals, wherein a maximum gradient of the first gradient interval is less than a minimum gradient of the second gradient interval, and wherein a maximum gradient of the second gradient interval is less than a minimum gradient of the third gradient interval.
4. The method of claim 3, wherein said determining an optimal brake current from the brake currents corresponding to the grade interval and brake pedal travel comprises:
if the gradient interval is the first gradient interval, acquiring braking current corresponding to a brake pedal stroke, and taking the smaller one of the braking current corresponding to the brake pedal stroke and the braking current corresponding to the maximum gradient of the first gradient interval as the optimal braking current;
and if the gradient interval is the second gradient interval and the third gradient interval, acquiring braking current corresponding to a brake pedal stroke, and taking the smaller one of the braking current corresponding to the brake pedal stroke and the braking current corresponding to the parking gradient as the optimal braking current.
5. The method according to claim 3 or 4, further comprising, after controlling the electronically controlled braking system to output a braking force using the optimal braking current:
and if the gradient interval is the third gradient interval, generating preset prompt information, and carrying out high gradient prompt by using the preset prompt information.
6. The method of claim 1, wherein the detecting whether the vehicle satisfies an active thermal control condition of an electronically controlled brake system comprises:
acquiring the current speed of the vehicle;
when the current vehicle speed is smaller than or equal to a preset vehicle speed, judging that the vehicle is in a stationary state, and detecting the duration of the vehicle in the stationary state;
and when the duration time is longer than the preset time, judging that the vehicle meets the active heat control condition of the electric control braking system, otherwise, judging that the vehicle does not meet the active heat control condition of the electric control braking system.
7. The method of claim 1, wherein the obtaining a parking grade of the vehicle comprises:
acquiring a longitudinal acceleration of the vehicle;
and calculating the parking gradient of the vehicle according to the longitudinal acceleration.
8. A thermal control device for vehicle braking, the device comprising:
the detection module is used for detecting whether the vehicle meets the active heat control condition of the electric control braking system or not;
the calculation module is used for acquiring the parking gradient of the vehicle if the vehicle meets the active heat control condition of the electric control braking system, and calculating according to the parking gradient to obtain the optimal braking current meeting the heating value control requirement of the electric control braking system;
and the control module is used for controlling the electric control braking system to output braking force by utilizing the optimal braking current.
9. A vehicle, characterized in that the vehicle comprises: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the method of any one of claims 1 to 7.
10. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed, implements the method according to any of claims 1 to 7.
CN202310671354.8A 2023-06-07 2023-06-07 Thermal control method and device for vehicle braking, vehicle and storage medium Pending CN116749935A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310671354.8A CN116749935A (en) 2023-06-07 2023-06-07 Thermal control method and device for vehicle braking, vehicle and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310671354.8A CN116749935A (en) 2023-06-07 2023-06-07 Thermal control method and device for vehicle braking, vehicle and storage medium

Publications (1)

Publication Number Publication Date
CN116749935A true CN116749935A (en) 2023-09-15

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