Vehicle control method and device, storage medium and program product

Abstract

The invention discloses a vehicle control method and device, a storage medium and a program product, and relates to the technical field of vehicle control, the vehicle control method is disclosed, a brake system of a current vehicle is provided with a brake shoe, and the vehicle control method comprises the steps that the temperature of the brake shoe of the current vehicle is detected, and the real-time brake temperature is obtained; after the real-time braking temperature is larger than a preset temperature threshold value, preset heat dissipation operation is executed on the brake shoe; judging whether the brake shoe has a brake failure risk or not, wherein the brake failure risk comprises at least one of a thermal runaway risk and a deformation failure risk; and if the brake shoe has the brake failure risk, emergency speed reduction operation is carried out on the current vehicle. The technical problem that driving safety may be harmed by high temperature of the brake shoe under the braking working condition is solved.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a vehicle control method, device, storage medium and program product. Background Art

[0002] With the rapid development of the automobile industry, vehicle performance has been continuously improved. With the increasingly complete highway network and the increasingly busy urban traffic, the vehicle's braking system has also brought great challenges. As an important part of vehicle safety, the braking system has one of its core components, the brake shoe, which achieves braking through close contact with the brake disc or brake drum.

[0003] However, under braking conditions, the friction between the brake shoe and the brake disc / drum will generate a lot of heat. If this heat cannot be dissipated in a timely and effective manner, it will cause the temperature of the brake shoe and surrounding components to rise sharply. High temperature environment has a significant adverse effect on the braking effect of the brake shoe, which may cause a sharp decline in braking ability or even complete failure, endangering driving safety.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present application is to provide a vehicle control method, device, storage medium and program product, aiming to solve the technical problem that the brake shoe may endanger driving safety due to high temperature under braking conditions.

[0006] To achieve the above purpose, the present application proposes a vehicle control method. The braking system of the current vehicle is equipped with a brake shoe. The vehicle control method includes:

[0007] Detecting the temperature of the brake shoe of the current vehicle to obtain a real-time brake temperature;

[0008] After the real-time brake temperature is greater than a predetermined temperature threshold, performing a preset heat dissipation operation on the brake shoe;

[0009] Determining whether the brake shoe has a brake failure risk, wherein the brake failure risk includes at least one of a thermal runaway risk and a deformation failure risk;

[0010] If the brake shoe has a risk of brake failure, an emergency deceleration operation is performed on the current vehicle.

[0011] In one embodiment, before the step of determining whether the brake shoe has a brake failure risk, the method includes:

[0012] Acquiring the current driving road condition information of the vehicle;

[0013] According to the driving road condition information, determining whether there is a frequent braking section in the subsequent road condition of the current vehicle;

[0014] If there is a frequent braking section in the subsequent road condition of the current vehicle, the steps are executed: determining whether there is a risk of brake failure of the brake shoe;

[0015] If there is no frequent braking section in the subsequent road condition of the current vehicle, the step of performing a preset heat dissipation operation on the brake shoe is performed after the real-time braking temperature is greater than a predetermined temperature threshold.

[0016] In one embodiment, before the step of determining whether the brake shoe has a brake failure risk, the method further includes:

[0017] Obtaining a temperature variation trend of the brake shoe under the preset heat dissipation operation;

[0018] If the temperature change trend is an upward trend, the steps are performed: determining whether the brake shoe has a brake failure risk;

[0019] If the temperature change trend is not an upward trend, the step of performing a preset heat dissipation operation on the brake shoe is performed after the real-time brake temperature is greater than a predetermined temperature threshold.

[0020] In one embodiment, the step of determining whether the brake shoe has a brake failure risk comprises:

[0021] Obtaining a product model of the brake shoe, and determining a thermal runaway temperature of the brake shoe according to the product model;

[0022] After the real-time brake temperature is greater than the thermal runaway temperature, it is determined that the brake shoe has a brake failure risk.

[0023] In one embodiment, the step of determining whether the brake shoe has a brake failure risk further includes:

[0024] Performing deformation detection on the brake shoe to obtain the deformation amount of the brake shoe;

[0025] After the deformation amount of the brake shoe is greater than a predetermined deformation threshold, it is determined that the brake shoe has a brake failure risk.

[0026] In one embodiment, after the step of determining whether the brake shoe has a brake failure risk, the method includes:

[0027] If the brake shoe does not have a brake failure risk, obtaining a temperature difference between the real-time brake temperature and the predetermined temperature threshold;

[0028] The heat dissipation to the brake shoe is adjusted according to the temperature difference.

[0029] In one embodiment, after the step of adjusting the heat dissipation of the brake shoe according to the temperature difference between the real-time brake temperature and the predetermined temperature threshold, the method further comprises:

[0030] After the heat dissipation reaches a maximum heat dissipation, obtaining a cooling rate of the brake shoe;

[0031] After the temperature drop rate is less than a predetermined temperature drop threshold, a preset speed limit operation is performed on the current vehicle.

[0032] In addition, to achieve the above-mentioned purpose, the present application also proposes a vehicle control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the vehicle control method as described above.

[0033] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the vehicle control method described above are implemented.

[0034] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the vehicle control method described above are implemented.

[0035] One or more technical solutions proposed in this application have at least the following technical effects:

[0036] In the vehicle control method proposed in the present application, the braking system of the current vehicle is equipped with a brake shoe. By detecting the temperature of the brake shoe of the current vehicle, the real-time braking temperature is obtained to realize real-time temperature monitoring of the brake shoe. When the real-time braking temperature is greater than the predetermined temperature threshold, it means that the temperature of the brake shoe is high at this time, which may affect the braking effect. Then, a preset heat dissipation operation can be performed on the brake shoe, thereby reducing the temperature of the brake shoe and reducing the possibility of a decrease in the braking effect or even failure. Furthermore, it can be judged whether the brake shoe has a risk of brake failure through information such as the real-time brake temperature and the deformation of the brake shoe, wherein the risk of brake failure includes at least one of the risk of thermal runaway and the risk of deformation failure. If the brake shoe has a risk of brake failure, an emergency deceleration operation is performed on the current vehicle. In this way, it can be ensured that when there is a risk of brake failure, the vehicle speed can be reduced through an emergency deceleration operation, greatly reducing the driving risk. The present application monitors the real-time temperature of the brake shoe to dissipate heat from the brake shoe at an appropriate time, thereby reducing the possibility of reduced braking effect or even brake failure of the brake shoe, and further performs emergency deceleration in a timely manner when there is a risk of brake failure. Thus, the present application solves the technical problem that the brake shoe may endanger driving safety due to high temperature under braking conditions through a series of intervention strategies for the brake shoe. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 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.

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0039] Figure 1 A schematic diagram of a flow chart provided for the first embodiment of the vehicle control method of the present application;

[0040] Figure 2 A schematic diagram of a flow chart provided for the second embodiment of the vehicle control method of the present application;

[0041] Figure 3 A schematic diagram of a flow chart provided for the third embodiment of the vehicle control method of the present application;

[0042] Figure 4 A flow chart of a fourth embodiment of the vehicle control method of the present application;

[0043] Figure 5Schematic diagram of the device structure of the hardware operating environment involved in the vehicle control method in the embodiment of the present application.

[0044] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0046] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0047] The main solution of the embodiment of the present application is: detecting the temperature of the brake shoe of the current vehicle to obtain the real-time brake temperature; after the real-time brake temperature is greater than a predetermined temperature threshold, performing a preset heat dissipation operation on the brake shoe; judging whether the brake shoe has a brake failure risk, wherein the brake failure risk includes at least one of a thermal runaway risk and a deformation failure risk; if the brake shoe has a brake failure risk, performing an emergency deceleration operation on the current vehicle.

[0048] In this embodiment, for the convenience of description, the vehicle controller is used as the execution subject for explanation below.

[0049] In the prior art, with the rapid development of the automobile industry, vehicle performance is constantly improving. With the increasingly complete highway network and the increasingly busy urban traffic, the vehicle's braking system has also brought great challenges. As an important part of vehicle safety, one of the core components of the braking system is the brake shoe, which achieves braking through close contact with the brake disc or brake drum.

[0050] However, under braking conditions, the friction between the brake shoe and the brake disc / drum will generate a lot of heat. If this heat cannot be dissipated in a timely and effective manner, it will cause the temperature of the brake shoe and surrounding components to rise sharply. High temperature environment has a significant adverse effect on the braking effect of the brake shoe, which may cause a sharp decline in braking ability or even complete failure, endangering driving safety.

[0051] The present application provides a solution, which monitors the temperature of the brake shoe in real time to dissipate heat from the brake shoe at an appropriate time, thereby reducing the possibility of brake failure of the brake shoe, and further performs emergency deceleration in a timely manner when there is a risk of brake failure, thereby greatly reducing driving risks. Thus, the present application solves the technical problem that the brake shoe may endanger driving safety due to high temperature under braking conditions through a series of intervention strategies for the brake shoe.

[0052] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a vehicle controller, etc. The following takes the vehicle controller as an example to illustrate this embodiment and the following embodiments.

[0053] Based on this, the embodiment of the present application provides a vehicle control method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the vehicle control method of the present application.

[0054] In this embodiment, the braking system of the current vehicle is equipped with brake shoes, and the vehicle control method includes steps S10 to S40:

[0055] Step S10, detecting the temperature of the brake shoe of the current vehicle to obtain a real-time brake temperature;

[0056] It should be noted that the braking system of the current vehicle is equipped with a brake shoe, and the brake shoe achieves vehicle braking by closely contacting with a brake disc or a brake drum in the braking system of the current vehicle.

[0057] In this embodiment, the temperature of the brake shoe of the current vehicle can be detected by a temperature sensor to obtain the real-time brake temperature of the current vehicle, thereby achieving real-time monitoring of the temperature of the brake shoe.

[0058] Step S20, after the real-time brake temperature is greater than a predetermined temperature threshold, performing a preset heat dissipation operation on the brake shoe;

[0059] It should be noted that the predetermined temperature threshold is a temperature value preset to trigger a heat dissipation operation, such as 50° C., 60° C., 70° C., etc.

[0060] In this embodiment, when the real-time brake temperature is greater than the predetermined temperature threshold, it indicates that the temperature of the brake shoe is relatively high at this time, and a preset heat dissipation operation can be performed on the brake shoe. It can be understood that the preset heat dissipation operation is an operation pre-set to dissipate heat for the brake shoe, such as air cooling (i.e., forced air convection is performed on the area where the brake shoe is located by a fan, and heat is dissipated by accelerating the flow of air), water cooling (directly spraying liquid on the brake shoe, and heat is dissipated by evaporation of the liquid), etc. In this embodiment, when the temperature of the brake shoe is relatively high, the temperature of the brake shoe is reduced by the preset heat dissipation measures, thereby avoiding the possibility of a decrease in the braking effect or even failure due to continuous heat accumulation causing the brake shoe to be always in a high temperature state.

[0061] Step S30, determining whether the brake shoe has a brake failure risk, wherein the brake failure risk includes at least one of a thermal runaway risk and a deformation failure risk;

[0062] It should be noted that the thermal runaway risk is the risk of brake failure caused by thermal runaway of the brake shoe, and the deformation failure risk is the risk of brake failure caused by deformation of the brake shoe.

[0063] As an example, since different brake shoes have different characteristics such as hardness, strength, wear resistance, and high temperature resistance, this embodiment can obtain the product model of the brake shoe and determine the thermal runaway temperature of the brake shoe according to the product model to obtain the temperature value (i.e., thermal runaway temperature) at which the brake shoe may experience thermal runaway. Furthermore, when the real-time braking temperature is greater than the thermal runaway temperature, it indicates that the brake shoe may experience thermal runaway, and it can be determined that the brake shoe has a risk of brake failure. If the real-time braking temperature is not greater than the thermal runaway temperature, it is determined that the brake shoe does not have a risk of brake failure. This embodiment identifies a more accurate thermal runaway temperature through the product model of the brake shoe to improve the accuracy of identifying the risk of brake failure of the brake shoe.

[0064] As another example, in a real driving scenario, if the brake shoe is at a high temperature for a long time, even if the real-time braking temperature does not reach the thermal runaway temperature in a short time, the brake shoe will be deformed, causing the braking effect of the brake shoe to seriously decline or even fail. Therefore, this embodiment can obtain the deformation amount of the brake shoe by performing deformation detection on the brake shoe. The deformation amount of the brake shoe is a value that characterizes the degree of deformation of the brake shoe. When the deformation amount of the brake shoe is greater than the predetermined deformation threshold, it means that the brake shoe has been deformed under conditions of long-term high temperature, long-term wear, etc., which may cause the contact between the brake shoe and the brake drum (or brake disc) to be not tight enough, resulting in the possibility of a decline in the braking effect or even failure, and it can be determined that the brake shoe has a risk of brake failure. If the deformation amount of the brake shoe is not greater than the predetermined deformation threshold, it means that the brake shoe can still provide sufficient braking force for the current vehicle, and it is determined that the brake shoe does not have a risk of brake failure.

[0065] In a feasible implementation, step S30 may include steps S31 to S32:

[0066] Step S31, obtaining the product model of the brake shoe, and determining the thermal runaway temperature of the brake shoe according to the product model;

[0067] Step S32: after the real-time brake temperature is greater than the thermal runaway temperature, determining that the brake shoe has a thermal runaway risk.

[0068] It should be noted that there is a corresponding relationship between the product model of the brake shoe and the thermal runaway temperature. The thermal runaway temperature is also called the thermal decay temperature, which is the temperature point at which the brake shoe begins to lose braking effectiveness and the braking performance decreases significantly under high temperature conditions.

[0069] Since different brake shoes have different characteristics such as hardness, strength, wear resistance, and high temperature resistance, this embodiment can obtain the product model of the brake shoe and determine the thermal runaway temperature of the brake shoe according to the product model to obtain the temperature value (i.e., thermal runaway temperature) at which the brake shoe may experience thermal runaway. Exemplarily, this embodiment can query the corresponding relationship between the product model and the thermal runaway temperature according to the product model of the brake shoe to obtain the thermal runaway temperature of the brake shoe. Further, when the real-time braking temperature is greater than the thermal runaway temperature, it indicates that the brake shoe may experience thermal runaway, indicating that in this embodiment, the brake shoe still reaches the thermal runaway temperature after performing the preset heat dissipation operation, and it can be determined that the brake shoe has a risk of brake failure. If the real-time braking temperature is not greater than the thermal runaway temperature, it is determined that the brake shoe does not have a risk of brake failure. This embodiment identifies a more accurate thermal runaway temperature through the product model of the brake shoe to improve the accuracy of identifying the risk of brake failure of the brake shoe.

[0070] In another feasible implementation, step S30 may further include steps S33 to S34:

[0071] Step S33, performing deformation detection on the brake shoe to obtain the deformation amount of the brake shoe;

[0072] Step S34: after the deformation amount of the brake shoe is greater than a predetermined deformation threshold, it is determined that the brake shoe has a risk of deformation failure.

[0073] It should be noted that the deformation amount of the brake shoe is a value that characterizes the degree of deformation of the brake shoe. Exemplarily, the deformation amount may be the gap distance between the brake shoe and the brake drum (or brake disc), the non-contact area on the contact surface between the brake shoe and the brake drum (or brake disc), the wear amount of the brake shoe, etc. The predetermined deformation threshold is a deformation amount that is pre-set at which the brake shoe is difficult to provide sufficient braking force for the current vehicle.

[0074] In a real driving scenario, if the brake shoe is at a high temperature for a long time, even if the real-time braking temperature does not reach the thermal runaway temperature in a short time, the brake shoe will be deformed, causing the braking effect of the brake shoe to seriously decline or even fail. Therefore, this embodiment can obtain the deformation amount of the brake shoe by performing deformation detection on the brake shoe. When the deformation amount of the brake shoe is greater than the predetermined deformation threshold, it means that the brake shoe has been deformed under conditions of long-term high temperature, long-term wear, etc., which may cause the contact between the brake shoe and the brake drum (or brake disc) to be not tight enough, resulting in the possibility of a decline in the braking effect or even failure, and it can be determined that the brake shoe has a risk of brake failure. If the deformation amount of the brake shoe is not greater than the predetermined deformation threshold, it means that the brake shoe can still provide sufficient braking force for the current vehicle, and it is determined that the brake shoe does not have a risk of brake failure.

[0075] It can be understood that the embodiments of steps S31 to S32 in this embodiment can be executed simultaneously with the embodiments of steps S33 to S34. Or they can be executed successively, such as obtaining the product model of the brake shoe, and determining the thermal runaway temperature of the brake shoe according to the product model; after the real-time braking temperature is not greater than the thermal runaway temperature, performing deformation detection on the brake shoe to obtain the deformation amount of the brake shoe; after the deformation amount of the brake shoe is greater than the predetermined deformation threshold, determining that the brake shoe has a risk of deformation failure. Alternatively, performing deformation detection on the brake shoe to obtain the deformation amount of the brake shoe; after the deformation amount of the brake shoe is not greater than the predetermined deformation threshold, obtaining the product model of the brake shoe, and determining the thermal runaway temperature of the brake shoe according to the product model; after the real-time braking temperature is greater than the thermal runaway temperature, determining that the brake shoe has a risk of thermal runaway.

[0076] Step S40: If the brake shoe has a risk of brake failure, an emergency deceleration operation is performed on the current vehicle.

[0077] In the case where the brake shoe has a risk of achieving braking, this embodiment can perform an emergency deceleration operation on the current vehicle to quickly reduce the speed of the current vehicle and avoid the occurrence of danger. The emergency deceleration operation is a pre-set operation to urgently reduce the speed of the current vehicle, such as using the engine to downshift step by step to assist braking, adjusting kinetic energy recovery to the maximum level, cutting off the power transmission between the engine and the wheels, using the handbrake to assist braking, driving into an emergency escape lane, and using facilities such as sand or pools in the escape lane to slow down. Furthermore, in the case where the brake shoe has a risk of achieving braking, this embodiment can also output preset warning information, such as turning on the hazard warning lights, showing the driver a prompt that there is a risk of brake failure, etc., to further reduce the risk of the current vehicle when performing an emergency deceleration operation.

[0078] The first embodiment of the present application provides a vehicle control method, wherein the braking system of the current vehicle is equipped with a brake shoe, and the real-time braking temperature is obtained by detecting the temperature of the brake shoe of the current vehicle, so as to realize real-time temperature monitoring of the brake shoe. When the real-time braking temperature is greater than the predetermined temperature threshold, it means that the temperature of the brake shoe is relatively high at this time, which may affect the braking effect, and then the preset heat dissipation operation can be performed on the brake shoe, thereby reducing the temperature of the brake shoe and reducing the possibility of a decrease in the braking effect or even failure. Furthermore, it can be judged whether the brake shoe has a risk of brake failure through information such as the real-time brake temperature and the deformation of the brake shoe, wherein the risk of brake failure includes at least one of the risk of thermal runaway and the risk of deformation failure. If the brake shoe has a risk of brake failure, an emergency deceleration operation is performed on the current vehicle. In this way, it can be ensured that when there is a risk of brake failure, the vehicle speed can be reduced through an emergency deceleration operation, thereby greatly reducing the driving risk. This embodiment monitors the real-time temperature of the brake shoe to dissipate heat from the brake shoe at an appropriate time, thereby reducing the possibility of reduced braking effect or even brake failure of the brake shoe, and further performs emergency deceleration in a timely manner when there is a risk of brake failure. This embodiment solves the technical problem that the brake shoe may endanger driving safety due to high temperature under braking conditions through a series of intervention strategies for the brake shoe.

[0079] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 2 Before step S30, the vehicle control method includes steps A10 to A40:

[0080] Step A10, obtaining the current driving road condition information of the vehicle;

[0081] Step A20, judging whether there is a frequent braking section in the subsequent road condition of the current vehicle according to the driving road condition information;

[0082] Step A30, if there is a frequent braking section in the subsequent road condition of the current vehicle, then execute the steps of: determining whether there is a risk of brake failure of the brake shoe;

[0083] Step A40, if there is no frequent braking section in the subsequent road condition of the current vehicle, then execute the step: after the real-time braking temperature is greater than a predetermined temperature threshold, perform a preset heat dissipation operation on the brake shoe.

[0084] It should be noted that the driving road condition information includes road conditions, traffic conditions and other related information of the road the vehicle is currently traveling on. The frequently braking section is a section where frequent braking operations are required, such as a long downhill slope, a series of curves, a congested section and the like.

[0085] This embodiment can obtain the driving road condition information of the road where the current vehicle is located according to the positioning information of the current vehicle. Furthermore, this embodiment can use a road section with a preset distance length in the driving direction of the current vehicle as a subsequent road section, and retrieve the road condition information corresponding to the subsequent road section from the driving road condition information as the subsequent road condition. Then, it is determined whether there is a frequent braking section in the subsequent road condition of the current vehicle; if there is a frequent braking section in the subsequent road condition of the current vehicle, it means that the current vehicle may frequently perform braking operations under the subsequent road condition, thereby further improving the real-time braking temperature, and then the step of determining whether there is a risk of brake failure of the brake shoe to monitor whether there is a risk of brake failure of the brake shoe of the current vehicle under the subsequent road condition. If there is no frequent braking section in the subsequent road condition of the current vehicle, it means that the current vehicle does not need to frequently perform braking operations under the subsequent road condition, and then the step of performing a preset heat dissipation operation on the brake shoe can be performed after the real-time braking temperature is greater than a predetermined temperature threshold.

[0086] This embodiment predicts whether the brake shoe will further heat up by determining whether the current vehicle needs to perform frequent braking operations in subsequent road conditions based on the driving road condition information of the current vehicle, thereby determining whether the brake failure risk of the brake shoe needs to be monitored in the future, thereby reducing ineffective monitoring of the brake failure risk of the brake shoe.

[0087] Based on the first embodiment of the present application, in the third embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 3 Before step S30, the vehicle control method further includes steps B10 to B30:

[0088] Step B10, obtaining a temperature change trend of the brake shoe under the preset heat dissipation operation;

[0089] Step B20, if the temperature change trend is an upward trend, then executing the step of: determining whether the brake shoe has a brake failure risk;

[0090] Step B30, if the temperature change trend is not an upward trend, then execute the step: after the real-time brake temperature is greater than a predetermined temperature threshold, perform a preset heat dissipation operation on the brake shoe.

[0091] In real scenarios, even if there is no frequent braking section in the subsequent road conditions of the current vehicle, it is possible that the preset heat dissipation operation cannot meet the heat dissipation requirements of the brake shoe in the current vehicle, causing the temperature of the brake shoe to continue to rise, bringing the risk of brake failure. Therefore, in this embodiment, the temperature change value between the real-time brake temperature at the current moment and the real-time brake temperature before the preset comparison time (such as 1 minute, 2 minutes, etc.) is obtained. The temperature change trend of the brake shoe under the preset heat dissipation operation is determined according to the temperature change value. Taking the temperature change value as the real-time brake temperature at the current moment minus the real-time brake temperature before the preset comparison time (such as 1 minute, 2 minutes, etc.) as an example, if the temperature change value is a positive value, it means that the temperature of the brake shoe at the current moment is higher than that before the preset comparison time, and if the temperature change value is a negative value, it means that the temperature of the brake shoe at the current moment is lower than that before the preset comparison time. In this embodiment, if the temperature change value is greater than a preset temperature rise threshold (such as 5°C, 10°C, 15°C, etc.), it is determined that the temperature change trend of the brake shoe under the preset heat dissipation operation is an upward trend. If the temperature change value is less than a preset temperature drop threshold (such as -5°C, -10°C, -15°C, etc.), it is determined that the temperature change trend of the brake shoe under the preset heat dissipation operation is a downward trend. If the temperature change value is not greater than the preset temperature rise threshold and not less than the preset temperature drop threshold, it is determined that the temperature change trend of the brake shoe under the preset heat dissipation operation is a stable trend.

[0092] It can then be determined whether the temperature change trend is an upward trend. If the temperature change trend is an upward trend, it means that the preset heat dissipation operation is difficult to meet the current heat dissipation demand of the brake shoe, and it is likely to cause the real-time brake temperature to exceed the thermal runaway temperature. Then, the step of determining whether the brake shoe has a brake failure risk to monitor the brake failure risk can be performed. If the temperature change trend is not an upward trend, the preset heat dissipation operation can meet the current heat dissipation demand of the brake shoe, and it is difficult for the real-time brake temperature to exceed the thermal runaway temperature. Then, the step of performing the preset heat dissipation operation on the brake shoe after the real-time brake temperature is greater than a predetermined temperature threshold can be performed.

[0093] This embodiment obtains the temperature change trend of the brake shoe under the preset heat dissipation operation; if the temperature change trend is an upward trend, the step of determining whether the brake shoe has a brake failure risk is executed; if the temperature change trend is not an upward trend, the step of executing the preset heat dissipation operation on the brake shoe after the real-time brake temperature is greater than a predetermined temperature threshold is executed. This embodiment identifies whether the preset heat dissipation operation can meet the current heat dissipation demand of the brake shoe through the temperature change trend, thereby determining whether the brake failure risk of the brake shoe needs to be monitored later, thereby reducing the ineffective monitoring of the brake failure risk of the brake shoe.

[0094] Based on the first embodiment of the present application, in the fourth embodiment of the present application, the same or similar contents as those in the first embodiment can be referred to the above description, and will not be described in detail later. Figure 4 After step S30, the vehicle control method further includes steps C10 to C20:

[0095] Step C10, if the brake shoe does not have a brake failure risk, obtaining a temperature difference between the real-time brake temperature and the predetermined temperature threshold;

[0096] Step C20, adjusting the heat dissipation of the brake shoe according to the temperature difference.

[0097] It should be noted that the heat dissipation is a value that characterizes the heat loss of the brake shoe. Exemplarily, the heat dissipation can be values ​​such as the fan speed and output power in air cooling, or can be values ​​such as the coolant spray volume and spray frequency in water cooling.

[0098] In this embodiment, if the brake shoe does not have a risk of brake failure, it means that the temperature of the brake shoe is relatively high at this time, but it will not have a significant impact on the braking effect. Therefore, in this embodiment, the temperature difference between the real-time braking temperature and the predetermined temperature threshold can be obtained, and then the heat dissipation of the brake shoe can be adjusted according to the temperature difference. Exemplarily, taking the temperature difference as the real-time braking temperature minus the predetermined temperature threshold, the temperature difference is positively correlated with the heat dissipation of the brake shoe, that is, the larger the temperature difference, the larger the heat dissipation of the brake shoe, such as increasing the speed and output power of the fan, increasing the spraying amount and spraying frequency of the coolant, etc.; that is, the smaller the temperature difference, the smaller the heat dissipation of the brake shoe, such as reducing the speed and output power of the fan, reducing the spraying amount and spraying frequency of the coolant, etc. In this way, the heat dissipation of the brake shoe matches the real-time braking temperature of the brake shoe, avoiding the situation where the real-time braking temperature is low and the full power is still used for air cooling or water cooling.

[0099] In a feasible embodiment, step C10 includes steps C30 to C40:

[0100] Step C30, after the heat dissipation reaches the maximum heat dissipation, obtaining the cooling rate of the brake shoe;

[0101] Step C40, after the cooling rate is less than a predetermined cooling threshold, executing a preset speed limit operation on the current vehicle.

[0102] It should be noted that the preset speed limit operation can be an indirect speed limit, such as outputting a speed limit prompt to enable the driver of the current vehicle to limit the speed; it can also be a direct speed limit, such as limiting the maximum speed of the current vehicle to a predetermined speed limit.

[0103] Since the faster the vehicle speed, the more heat will be generated when the braking operation is performed, so this embodiment can obtain the cooling rate of the brake shoe by calculating the ratio between the temperature change value between the real-time braking temperature at the current moment and the real-time braking temperature before the preset reference time (such as 3 minutes, 5 minutes, 10 minutes, etc.) and the preset reference time after the heat dissipation reaches the maximum heat dissipation. Then, it can be judged whether the cooling rate is less than the preset cooling threshold (such as -3℃ / min, -5℃ / min, -8℃ / min, etc.) to determine whether the cooling of the brake shoe can be achieved after the heat dissipation reaches the maximum heat dissipation. When the cooling rate is less than the preset cooling threshold, it means that the cooling efficiency of the brake shoe at the maximum heat dissipation is poor, so the preset speed limit operation is performed on the current vehicle to reduce the generation of heat and improve the cooling amplitude and efficiency.

[0104] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the vehicle control method of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0105] The present application provides a vehicle control device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the vehicle control method in the above-mentioned embodiment one.

[0106] Reference below Figure 5, which shows a schematic diagram of the structure of a vehicle control device suitable for implementing an embodiment of the present application. The vehicle control device in the embodiment of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle controllers), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The vehicle control device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0107] like Figure 5 As shown, the vehicle control device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the vehicle control device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the vehicle control device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a vehicle control device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0108] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0109] The vehicle control device provided by the present application adopts the vehicle control method in the above embodiment, which can solve the technical problem that the brake shoe may endanger driving safety due to high temperature under braking conditions. Compared with the prior art, the beneficial effects of the vehicle control device provided by the present application are the same as the beneficial effects of the vehicle control method provided by the above embodiment, and other technical features in the vehicle control device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0110] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0111] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0112] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the vehicle control method in the above-mentioned embodiment.

[0113] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0114] The computer-readable storage medium may be included in the vehicle control device; or may exist independently without being assembled into the vehicle control device.

[0115] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the vehicle control device, the vehicle control device: detects the temperature of the brake shoe of the current vehicle to obtain the real-time braking temperature; after the real-time braking temperature is greater than a predetermined temperature threshold, performs a preset heat dissipation operation on the brake shoe; determines whether the brake shoe has a brake failure risk, wherein the brake failure risk includes at least one of a thermal runaway risk and a deformation failure risk; if the brake shoe has a brake failure risk, performs an emergency deceleration operation on the current vehicle.

[0116] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0117] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0118] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0119] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned vehicle control method, and can solve the technical problem that the brake shoe may endanger driving safety due to high temperature under braking conditions. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the vehicle control method provided in the above-mentioned embodiment, and will not be repeated here.

[0120] The present application also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the vehicle control method as described above are implemented.

[0121] The computer program product provided by the present application can solve the technical problem that the brake shoe may endanger driving safety due to high temperature under braking conditions. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the vehicle control method provided by the above embodiment, which will not be repeated here.

[0122] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A vehicle control method, characterized in that: The braking system of the current vehicle is equipped with brake shoes, and the vehicle control method includes: Detecting the temperature of the brake shoe of the current vehicle to obtain a real-time brake temperature; After the real-time brake temperature is greater than a predetermined temperature threshold, performing a preset heat dissipation operation on the brake shoe; Determining whether the brake shoe has a brake failure risk, wherein the brake failure risk includes at least one of a thermal runaway risk and a deformation failure risk; If the brake shoe has a risk of brake failure, an emergency deceleration operation is performed on the current vehicle.

2. The method according to claim 1, characterized in that Before the step of judging whether the brake shoe has a brake failure risk, the method includes: Acquiring the current driving road condition information of the vehicle; According to the driving road condition information, determining whether there is a frequent braking section in the subsequent road condition of the current vehicle; If there is a frequent braking section in the subsequent road condition of the current vehicle, the steps are executed: determining whether there is a risk of brake failure of the brake shoe; If there is no frequent braking section in the subsequent road condition of the current vehicle, the step of performing a preset heat dissipation operation on the brake shoe is performed after the real-time braking temperature is greater than a predetermined temperature threshold.

3. The method according to claim 1, characterized in that Before the step of judging whether the brake shoe has a brake failure risk, the method further includes: Obtaining a temperature variation trend of the brake shoe under the preset heat dissipation operation; If the temperature change trend is an upward trend, the steps are performed: determining whether the brake shoe has a brake failure risk; If the temperature change trend is not an upward trend, the step of performing a preset heat dissipation operation on the brake shoe is performed after the real-time brake temperature is greater than a predetermined temperature threshold.

4. The method according to claim 1, characterized in that The step of judging whether the brake shoe has a brake failure risk comprises: Obtaining a product model of the brake shoe, and determining a thermal runaway temperature of the brake shoe according to the product model; After the real-time brake temperature is greater than the thermal runaway temperature, it is determined that the brake shoe has a thermal runaway risk.

5. The method according to claim 4, characterized in that The step of judging whether the brake shoe has a brake failure risk also includes: Performing deformation detection on the brake shoe to obtain the deformation amount of the brake shoe; After the deformation amount of the brake shoe is greater than a predetermined deformation threshold, it is determined that the brake shoe has a deformation failure risk.

6. The method according to any one of claims 1 to 5, characterized in that After the step of determining whether the brake shoe has a brake failure risk, the method includes: If the brake shoe does not have a brake failure risk, obtaining a temperature difference between the real-time brake temperature and the predetermined temperature threshold; The heat dissipation to the brake shoe is adjusted according to the temperature difference.

7. The method according to claim 6, characterized in that After the step of adjusting the heat dissipation to the brake shoe according to the temperature difference between the real-time brake temperature and the predetermined temperature threshold, the method further comprises: After the heat dissipation reaches a maximum heat dissipation, obtaining a cooling rate of the brake shoe; After the temperature drop rate is less than a predetermined temperature drop threshold, a preset speed limit operation is performed on the current vehicle.

8. A vehicle control device, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the vehicle control method according to any one of claims 1 to 7.

9. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the vehicle control method according to any one of claims 1 to 7 are implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the vehicle control method according to any one of claims 1 to 7 are implemented.

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