WO2023083267A1

WO2023083267A1 - Overheat protection control method, apparatus and system for vehicle, and computer program and readable medium

Info

Publication number: WO2023083267A1
Application number: PCT/CN2022/131183
Authority: WO
Inventors: 王建
Original assignee: 长城汽车股份有限公司
Priority date: 2021-11-11
Filing date: 2022-11-10
Publication date: 2023-05-19
Also published as: CN115027259A

Abstract

An overheat protection control method, apparatus and system for a vehicle, and a computer program and a readable medium. The overheat protection control method for a vehicle comprises: acquiring a first temperature of a transfer case and real-time vehicle condition information of a vehicle, and determining whether the first temperature meets a first preset condition; determining, according to gear information of the vehicle, whether the gear of the vehicle is switched from a first gear to a second gear; determining a second temperature of the transfer case according to the real-time vehicle condition information; when the first gear is switched to the second gear, determining whether the second temperature meets a second preset condition; and when the first temperature meets the first preset condition and the second temperature meets the second preset condition, controlling a heat dissipation component in the vehicle to switch from a first working state to a second working state, and controlling the transfer case to switch from a working state to a torque-off state. By means of performing heat dissipation on a transfer case, a friction plate set in the transfer case is prevented from ablation.

Description

A vehicle overheat protection control method, device, system, computer program and readable medium

This disclosure claims the priority of the Chinese patent application with the application number 202111335000.3 and the invention title "A Vehicle Overheating Protection Control Method, Device and System" submitted to the China Patent Office on November 11, 2021, the entire contents of which are incorporated by reference in this disclosure.

technical field

The present disclosure relates to the technical field of vehicles, in particular to a vehicle overheating protection control method, device, system, computer program and readable medium.

Background technique

The vehicle transfer case is an important component to realize four-wheel drive in the vehicle power system. The transfer case is divided into full-time four-wheel drive, part-time four-wheel drive and timely four-wheel drive. The timely four-wheel drive is usually composed of wet clutches. When the wet clutch is working, the dual steel plate and the friction plate produce sliding friction, and the frictional heat will be absorbed by the dual steel plate, friction plate and lubricating oil. When the temperature of the surface of the friction pair is higher than the maximum temperature value designed for the friction pair, The friction pair will fail, so based on the protection of the wet clutch friction disc set, a thermal protection strategy should be established to cool down when the wet clutch is overheated.

At present, the friction group lubrication of the existing transfer case is lubricated and cooled by the oil pump, but the oil pump is a one-way rotor pump, the oil pump can lubricate the friction group when the vehicle is in the forward gear (D gear), and the oil pump does not pump oil when the vehicle is in reverse gear (R gear). , can not lubricate the friction group, only rely on the chain to stir oil for splash lubrication, the lubrication effect is poor, it is easy to cause slow cooling, and then cause the vehicle to use the R gear for a long time when it is out of trouble, and the temperature of the friction group will rise sharply due to poor cooling, resulting in friction group burning eclipse.

Contents of the invention

The purpose of the present disclosure is to provide a vehicle overheating protection control method, device, system, computer program and readable medium, so as to solve the problem that the friction group is easily ablated when the vehicle is used in reverse gear for a long time.

The technical scheme adopted in this disclosure is as follows:

A vehicle overheat protection control method, comprising:

Acquiring the first temperature of the transfer case and the real-time vehicle condition information of the vehicle, and judging whether the first temperature satisfies the first preset condition;

According to the gear position information of the vehicle, it is judged whether the gear position of the vehicle is switched from the first gear position to the second gear position;

determining the second temperature of the transfer case according to the real-time vehicle condition information;

When the first gear shifts to the second gear, judging whether the second temperature satisfies a second preset condition;

When the first temperature satisfies the first preset condition and the second temperature satisfies the second preset condition, controlling the heat dissipation components in the vehicle to switch from a first working state to a second working state , and control the transfer case to switch from the working state to the torque off state, to dissipate heat from the transfer case;

When the first temperature does not meet the first preset condition, and the second temperature satisfies the second preset condition, the transfer case is controlled to switch from the working state to the torque off state, and the The transfer case for heat dissipation.

Further, obtain the number of transfer case overheating times in the current ignition cycle of the vehicle;

When the first temperature satisfies the first preset condition, after a corresponding heat dissipation time, control the heat dissipation component to switch from the second working state back to the first working state, and control the transfer case to return to the working state;

When the first temperature does not meet the first preset condition, the transfer case is controlled to return to the working state after the heat dissipation period, and the heat dissipation period is determined according to the number of overheating times of the transfer case and the first temperature .

Further, the first temperature is the internal oil temperature.

Further, the second temperature is the current temperature of the friction plate set.

Further, the real-time vehicle condition information also includes: the current wheel speed of the vehicle, the duration of the vehicle being turned off, the outdoor temperature and the output torque of the engine, and the second temperature of the transfer case is determined according to the real-time vehicle condition information, include:

The current temperature of the friction plate set of the transfer case is determined according to the length of time the vehicle is turned off, the current wheel speed, the outdoor temperature, the current gear and the output torque of the engine.

Further, the first gear is a forward gear, and the second gear is a reverse gear, and when the first gear is switched to the second gear, it is judged whether the second temperature satisfies the first gear. Two preset conditions, including:

When switching from a forward gear to a reverse gear, it is judged whether the current temperature of the friction plate set is between the first threshold and the second threshold, and whether the current temperature of the friction plate set satisfies a third preset condition.

Further, the heat dissipation component is an engine cooling fan of the vehicle, and the rotation speed of the engine cooling fan in the second working state is higher than the rotating speed of the engine cooling fan in the first working state.

A vehicle overheat protection control device, comprising:

The first acquisition module is used to acquire the first temperature of the transfer case and the real-time vehicle condition information of the vehicle, and judge whether the first temperature meets the first preset condition;

The first judging module is used to judge whether the gear position of the vehicle is switched from the first gear position to the second gear position according to the gear position information of the vehicle;

A determining module, configured to determine the second temperature of the transfer case according to the real-time vehicle condition information;

A second judging module, configured to judge whether the second temperature satisfies a second preset condition when the first gear shifts to the second gear;

The first control module is configured to control the heat dissipation components in the vehicle to be operated by the first when the first temperature satisfies the first preset condition and the second temperature satisfies the second preset condition. The state is switched to the second working state, and the transfer case is controlled to switch from the working state to the torque off state, so as to dissipate heat from the transfer case;

The second control module is used to control the transfer case to switch from the working state to the In the torque-off state, the transfer case is dissipated to dissipate heat.

Further, the device also includes:

The second acquisition module is used to acquire the number of overheating times of the transfer case in the current ignition cycle of the vehicle;

The third control module is configured to control the heat dissipation component to switch from the second working state back to the first working state after a corresponding heat dissipation period when the first temperature satisfies the first preset condition, and control the The transfer case returns to working condition;

A fourth control module, configured to control the transfer case to return to the working state after the heat dissipation period when the first temperature does not meet the first preset condition, and the heat dissipation period depends on the transfer case The number of times of overheating and the first temperature are determined.

A vehicle overheat protection control system, comprising: the vehicle overheat protection control device.

Another object of the present disclosure is to propose a computer program based on a computing processing device to solve the problem of ablation of the friction group when the vehicle is used for a long time in reverse gear.

In order to achieve the above object, the disclosed technical solution is achieved in the following way:

A computer program, comprising computer readable codes, which, when the computer readable codes are run on a computing processing device, cause the computing processing device to execute the above-mentioned vehicle overheating protection control method.

The advantages of the computer program and the above-mentioned vehicle overheating protection control method are the same, and will not be repeated here.

Another object of the present disclosure is to provide a computer-readable medium storing the above-mentioned computer program.

The computer-readable medium has the same advantages as the above-mentioned computer program, which will not be repeated here.

In summary, due to the adoption of the above technical solution, a vehicle overheat protection control method, device, system, computer program and readable medium of the present disclosure have the following beneficial effects:

When the first temperature of the transfer case satisfies the first preset condition, when the current gear shifts from the first gear to the second gear, the second temperature of the transfer case satisfies the second preset condition , control the heat dissipation components in the vehicle to switch from the first working state to the second working state, control the transfer case to switch from the working state to the torque off state, and perform heat dissipation on the transfer case. It can quickly dissipate heat from the transfer case, improve the heat dissipation of the vehicle, effectively protect the heat dissipation of the powertrain, and avoid ablation of the friction group in the transfer case.

The above description is only an overview of the technical solution of the present disclosure. In order to better understand the technical means of the present disclosure, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present disclosure more obvious and understandable , the specific embodiments of the present disclosure are enumerated below.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present disclosure. For those skilled in the art, other drawings can also be obtained according to these drawings without creative work.

FIG. 1 is a flow chart of the steps of a vehicle overheat protection control method in an embodiment of the present disclosure;

FIG. 2 is a flow chart of the steps of another vehicle overheat protection control method in an embodiment of the present disclosure;

FIG. 3 is a block flow diagram of a vehicle overheat protection control method in an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a vehicle overheat protection control device in an embodiment of the present disclosure;

Fig. 5 schematically shows a block diagram of a computing processing device for performing a method according to the present disclosure;

Fig. 6 schematically shows a storage unit for holding or carrying program codes implementing the method according to the present disclosure.

specific embodiment

In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments It is a part of the embodiments of the present disclosure, but not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.

At present, after the wet clutch triggers an overheating alarm, the wet friction plate group of the transfer case disconnects the torque transmission to dissipate heat. However, due to the drag torque of the wet friction plate, if the vehicle does not stop running, it will still be out of trouble for a long time and the differential speed between the axles is large. Operation will cause the friction plate group to continue to heat up, and there is still a risk of friction group ablation.

The friction group lubrication of the existing transfer box is lubricated by the oil pump. However, the oil pump is a one-way rotor pump. When the vehicle is in forward gear (D gear), the oil pump can lubricate the friction group, and in reverse gear (R gear), it can only rely on the chain to stir oil. Splash lubrication, poor lubrication effect will easily lead to slow cooling, which will cause the vehicle to use R gear for a long time when it is out of trouble, and the temperature of the friction group will rise sharply due to poor cooling, resulting in ablation of the friction group.

In order to overcome the above problems, the present disclosure proposes a vehicle overheat protection control method to solve the problem that the friction group is easily ablated when the vehicle is used in reverse gear for a long time.

Embodiment one:

Referring to FIG. 1 , FIG. 1 is a flow chart of the steps of a vehicle overheat protection control method in an embodiment of the present disclosure. As shown in FIG. 1 , the method includes:

Step 101: Obtain a first temperature of the transfer case and real-time vehicle condition information of the vehicle, and determine whether the first temperature satisfies a first preset condition.

The vehicle overheating protection control method provided by the embodiments of the present disclosure is mainly applied in the control system of the four-wheel drive vehicle, specifically, the transfer case control unit in the control system of the four-wheel drive vehicle.

Specifically, the first temperature of the transfer case is the internal oil temperature of the transfer case, and the internal oil temperature is obtained through detection by a temperature sensor, and the obtaining of the first temperature of the transfer case is obtained only once. The judging whether the first temperature satisfies the first preset condition is judging whether the internal oil temperature exceeds a set temperature, and the set temperature is 100 degrees. When the internal oil temperature exceeds the set temperature, it means that the detected internal oil temperature is >100 degrees, that is, the internal oil temperature meets the first preset condition; if the internal oil temperature does not exceed the set temperature, it means that the detected internal oil temperature Temperature ≤ 100 degrees, that is, the internal oil temperature does not meet the first preset condition.

The real-time vehicle condition information is acquired and updated in real time, and the real-time acquisition of the real-time vehicle condition information is continuously performed in the inventive vehicle overheat protection control method. Further, in this embodiment, the real-time vehicle condition information also includes the current wheel speed of the vehicle, the duration of the vehicle being turned off, the outdoor temperature and the output torque of the engine. The current wheel speed is monitored by the body electronic stability system in the vehicle, the vehicle flameout duration is monitored by the body controller in the vehicle, the outdoor temperature is monitored by an air-conditioning sensor in the vehicle, and the engine Output torque is monitored by the vehicle's transmission control unit.

Step 102: According to the gear position information of the vehicle, it is judged whether the gear position of the vehicle is switched from the first gear position to the second gear position.

Specifically, the gear position information is obtained through the monitoring of the transmission control unit, the first gear position is a forward gear, and the second gear position is a reverse gear, and it is judged whether the gear position of the vehicle is switched from the first gear position to the second gear position position, that is, to judge whether the gear position of the vehicle is switched from forward gear to reverse gear.

Step 103: Determine the second temperature of the transfer case according to the real-time vehicle condition information.

In this embodiment, optionally, the second temperature is the current temperature of the friction plate set.

Optionally, the second temperature of the transfer case may include a variety of temperatures for judging whether the transfer case is overheated, such as the current temperature of the friction plate set of the transfer case, the temperature of the case of the transfer case, and the temperature inside the transfer case. temperature, etc., the internal temperature of the transfer case refers to the temperature in the cavity inside the transfer case. The current friction plate group temperature of the transfer case is obtained through calculation or measurement, and the case temperature of the transfer case and the internal temperature of the transfer case are obtained through measurement.

Step 104: When the first gear shifts to the second gear, determine whether the second temperature satisfies a second preset condition.

Further, when the forward gear is switched to the reverse gear, if the second temperature satisfies the second preset condition, it means that the reverse gear of the transfer case is overheated; if the second temperature does not meet the second preset condition, then Indicates that the transfer case is not overheating in reverse.

Step 105: When the first temperature satisfies the first preset condition and the second temperature satisfies the second preset condition, control the cooling components in the vehicle to switch from the first working state to the second working state. Two working states, and control the transfer case to switch from the working state to the torque off state, and dissipate heat from the transfer case.

Optionally, the heat dissipation component is an engine cooling fan, and the rotation speed of the engine cooling fan in the second working state is greater than the rotating speed of the engine cooling fan in the first working state, and the first working state of the engine cooling fan is The normal working condition of the engine cooling fan. Optionally, controlling the heat dissipation components in the vehicle to switch from the first working state to the second working state, and controlling the transfer case to switch from the working state to the torque off state to dissipate heat from the transfer case, That is, control the engine cooling fan to increase the speed to 3000rpm, and control the transfer case to be in the torque-off state, the transfer case will dissipate heat more quickly, and further improve the heat dissipation of the whole vehicle, effectively protecting the heat dissipation of the powertrain and avoiding split The friction pack in the actuator is ablated.

Step 106: When the first temperature does not meet the first preset condition and the second temperature meets the second preset condition, control the transfer case to switch from the working state to the torque off state , to dissipate heat from the transfer case.

Optionally, when the vehicle is running normally, the transfer case is in working state. Specifically, when the transfer case is in the torque-off state, the internal friction plate group is torque-off, and the chain stirs oil to splash and lubricate the friction group to cool down, that is, to dissipate heat from the transfer case. Controlling the transfer case from the working state to the torque-off state refers to controlling the friction plate group in the transfer case to be torque-off, the chain stirs oil to splash and lubricate the friction group, cool down, and dissipate heat from the transfer case.

Embodiment two:

Referring to FIG. 2 and FIG. 3 , FIG. 2 is a flow chart of steps of another vehicle overheat protection control method in an embodiment of the present disclosure. As shown in FIG. 2 , the method includes:

Step 201: Acquiring the internal oil temperature of the transfer case and the real-time vehicle condition information of the vehicle, and judging whether the internal oil temperature satisfies a first preset condition.

In this embodiment, the judging whether the first temperature satisfies the first preset condition is judging whether the internal oil temperature exceeds a set temperature, and the set temperature is 100 degrees. When the internal oil temperature exceeds the set temperature, it means that the detected internal oil temperature is >100 degrees, that is, the internal oil temperature meets the first preset condition; if the internal oil temperature does not exceed the set temperature, it means that the detected internal oil temperature Temperature ≤ 100 degrees, that is, the internal oil temperature does not meet the first preset condition.

The real-time vehicle condition information also includes the current wheel speed of the vehicle, the duration of the vehicle being turned off, the outdoor temperature and the output torque of the engine. The current wheel speed is monitored by the body electronic stability system in the vehicle, the vehicle flameout duration is monitored by the body controller in the vehicle, the outdoor temperature is monitored by an air-conditioning sensor in the vehicle, and the engine Output torque is monitored by the vehicle's transmission control unit. The real-time vehicle condition information is acquired and updated in real time, and the real-time acquisition of the real-time vehicle condition information is continuously performed in the inventive vehicle overheat protection control method.

Step 202: According to the gear position information of the vehicle, it is judged whether the gear position of the vehicle is switched from a forward gear to a reverse gear.

Specifically, the gear position information is obtained through monitoring by the transmission control unit.

Step 203: Determine the current friction plate set temperature of the transfer case according to the real-time vehicle condition information.

In this embodiment, the current temperature of the friction plate set can be calculated according to the current wheel speed, the duration of the vehicle being turned off, the outdoor temperature and the output torque of the engine. The current temperature of the friction plate set represents the current real-time temperature of the friction plate set.

Specifically, the current temperature of the friction plate set is the last calculated temperature of the friction plate set plus the calorific value of the friction plate set minus the heat dissipation of the friction plate set.

Optionally, the method of obtaining the current temperature of the friction plate set is: directly monitoring the temperature of the oil fluid where the friction plate set is located through a temperature sensor, and inferring the current temperature of the friction plate set.

Step 204: Send prompt information to the instrument of the vehicle, where the prompt information is used to indicate the current temperature value of the friction plate set.

In this embodiment, after the current temperature of the friction plate set is calculated, prompt information is sent to the instrument of the vehicle, and the prompt information is used to indicate the current temperature value of the friction plate set. The presentation form of the prompt information is a dial form.

Specifically, the first threshold, that is, the reverse gear overheating warning value is 150 degrees, and the second threshold, that is, the forward gear overheating warning value is 200 degrees. On the dial used to display the temperature value of the friction plate group, the red area above 200 degrees, the orange area between 150 and 200 degrees, and the yellow area between 100 and 150 degrees. Based on this, users can clearly understand the current temperature and criticality of the friction plate set, so that customers can have psychological expectations to take countermeasures in advance, reduce the risk of overturning of extreme off-road vehicles, and avoid ablation of the friction plate set.

Step 205: When the forward gear is switched to the reverse gear, it is judged whether the current friction plate set temperature satisfies a second preset condition.

Further, including:

Sub-step 1: When the forward gear is switched to the reverse gear, it is judged whether the temperature of the friction plate set is between a first threshold and a second threshold.

The first threshold is a reverse gear overheating warning value, the second threshold is a forward gear overheating warning value, and the first threshold is lower than the second threshold. If it is determined that the current temperature of the friction plate set is between the first threshold and the second threshold, it means that the oil temperature of the friction set has reached the reverse gear overheat warning value, but has not reached the forward gear overheat warning value. Specifically, the first threshold, that is, the reverse gear overheating warning value is 150 degrees, and the second threshold, that is, the forward gear overheating warning value is 200 degrees.

Optionally, if it is determined that the current temperature of the friction plate set exceeds the second threshold, it means that the transfer case has overheated during the forward gear, and the friction plate set in the transfer case has already disconnected the torque. When shifting into reverse gear, the friction plate pack remains torque-off.

Sub-step 2: If it is determined that the temperature of the friction plate set is between the first threshold and the second threshold, it is determined whether the current temperature of the friction plate set satisfies a third preset condition, and/or the current wheel speed satisfies The fourth precondition.

The current temperature of the friction plate set satisfies the third preset condition, which means that the current temperature of the friction plate set has increased by the corresponding fine-tuning value. Specifically, the fine-tuning value is 5% of the real-time current temperature of the friction plate set in the previous step S1, that is, after determining that the temperature of the friction plate set is between the first threshold and the second threshold, continue to monitor the temperature of the friction plate set, and determine Whether the current temperature of the friction plate group continues to rise by the corresponding fine-tuning value.

Specifically, if the current temperature of the friction disc set between the first threshold and the second threshold in the last sub-step 1 is 160 degrees, the fine-tuning value is 160×5%, that is, 8 degrees. That is, after judging that 160 degrees is between 150 and 200 degrees, when the temperature of the friction plate group increases by 8 degrees, that is, after rising from 160 degrees to 168 degrees, it means that the current temperature of the friction plate group meets the third preset condition.

The current wheel speed satisfies the fourth preset condition, which means that the current wheel speed>set value, specifically, the set value of the current wheel speed is 2km/h. If the current friction plate group temperature between the first threshold and the second threshold is 160 degrees, the temperature of the rear friction plate group has increased by 2 degrees, but the current wheel speed at this time exceeds 2km/h, that is, the current friction plate The group temperature does not meet the third preset condition, and the current wheel speed meets the fourth preset condition, which means that the current friction plate group temperature meets the third preset condition, and/or the current wheel speed meets the fourth preset condition. set conditions.

At this time, the temperature of the friction plate group has not increased to the fine-tuning value, but the tires of the vehicle have been working, and a warning message is sent to the instrument of the vehicle, indicating that the transfer case is overheated. Adopting this method can avoid that when the current wheel speed is too high, the temperature of the friction plate group rises too fast, and the heat dissipation in the transfer case is not good; and the current wheel speed exceeds 2km/h, which means that the vehicle tires are working when the user is in reverse gear. It will not affect the user's driving perception.

Specifically, first judge whether the current friction plate group temperature has not increased by the fine-tuning value, and whether the current wheel speed is ≤ the set value, if not, execute a reverse gear overheating signal to the vehicle; if so, continue to judge the Whether the current temperature of the friction plate set has increased by the fine-tuning value, if the current temperature of the friction plate set has increased by the fine-tuning value, send a reverse gear overheating signal to the vehicle, if the current friction plate set temperature has not risen If the fine-tuning value is lower than the fine-tuning value, return to continue to judge whether the current temperature of the friction plate group has not increased by the fine-tuning value, and whether the current wheel speed is ≤ the set value.

Through the above method, referring to the current temperature of the friction plate group, when the reverse gear overheating warning value is reached, but the forward gear overheating warning value is not reached, the vehicle will switch from the forward gear to the reverse gear, and the warning message will not be sent immediately. After the temperature rises and the corresponding fine-tuning value is sent, a warning message is sent to improve the user's driving experience. There will be no user complaints that the vehicle tires do not move, and the vehicle will overheat directly after the reverse gear is engaged.

Sub-step S3: sending a reverse gear overheating signal to the vehicle.

In this embodiment, when the forward gear switches the reverse gear, the temperature of the friction plate set is between the first threshold and the second threshold, and the current temperature of the friction plate set satisfies the third preset condition , and/or when the front wheel speed satisfies the fourth preset condition, a reverse gear overheating signal is sent to the vehicle, the reverse gear overheating signal is used to indicate that the reverse gear of the transfer case is overheated, specifically, the reverse gear The information displayed by the overheating signal is "overheating of the reverse gear of the transfer case", and at the same time, the voice broadcasts to achieve the purpose of reminding the customer.

Optionally, if the current gear of the vehicle is shifted from neutral to reverse, after the temperature of the current friction plate set reaches the first threshold, a reverse gear overheating signal is directly sent to the vehicle to indicate that the transfer case Reverse gear is overheating.

Step 206: When the internal oil temperature satisfies the first preset condition and the current friction plate set temperature satisfies the second preset condition, control the cooling components in the vehicle to switch from the first working state to the second working state, and control the transfer case to switch from the working state to the torque-off state, so as to dissipate heat from the transfer case.

Specifically, the internal oil temperature is detected by a temperature sensor, and the first temperature meeting the first preset condition means that the internal oil temperature exceeds a set temperature, and the set temperature is 100 degrees. When the internal oil temperature exceeds the set temperature, it means that the detected internal oil temperature is > 100 degrees; if the internal oil temperature does not exceed the set temperature, it means that the detected internal oil temperature is ≤ 100 degrees.

When the internal oil temperature satisfies the first preset condition and the current friction plate set temperature satisfies the second preset condition, controlling the heat dissipation component to switch from the first working state to the second working state, And control the transfer case to switch from the working state to the torque off state. Further, the heat dissipation component refers to the engine cooling fan, and the engine cooling fan speed in the second working state is 3000rpm, and the cooling component is controlled to switch from the first working state to the second working state, that is, the engine cooling fan is controlled to increase the speed , such as the speed increased to 3000rpm. Controlling the transfer case to switch from the working state to the torque off state refers to controlling the torque off of the friction plate group in the transfer case, and the chain stirs oil to splash and lubricate the friction group to cool down.

When the internal oil temperature is too high, it will affect the heat dissipation of the friction plate set, which will easily lead to ablation of the friction plate set. In this embodiment, after detecting that the internal oil temperature exceeds the set temperature, while controlling the transfer case to switch from the working state to the torque-off state, the engine cooling fan is controlled to increase the speed, which further improves the heat dissipation of the whole vehicle, effectively It protects the heat dissipation of the powertrain and avoids ablation of the friction group in the transfer case.

Step 207: When the internal oil temperature does not meet the first preset condition and the current friction plate set temperature meets the second preset condition, control the transfer case to switch from the working state to the torque off state. In the open state, the transfer case is dissipated.

Further, controlling the transfer case to switch from the working state to the torque off state refers to controlling the torque disconnection of the friction plate group in the transfer case, and the chain stirs oil to splash and lubricate the friction group to cool down the temperature of the transfer case. To dissipate heat.

Step 208: Obtain the number of overheating times of the transfer case in the current ignition cycle of the vehicle.

In this embodiment, the current ignition cycle of the vehicle is from the ignition of the vehicle to the flameout of the vehicle, specifically, the ignition signal and the flameout signal can be identified by the vehicle control system. When the current temperature of the friction plate set satisfies the second preset condition, an overheating is counted; when the current temperature of the friction plate set falls below the first threshold and meets the second preset condition after a certain period of time, Calculate the overheating again, and calculate the transfer case overheating times according to the above rules.

Step 209: When the internal oil temperature satisfies the first preset condition, control the heat dissipation component to switch from the second working state back to the first working state after a corresponding cooling time, and control the transfer case to return to the working state .

When it is judged in step 201 that the internal oil temperature satisfies the first preset condition, after a corresponding heat dissipation time, control the heat dissipation component to switch from the second working state back to the first working state, and control the transfer The device returns to working condition. Controlling the cooling component to switch from the second working state back to the first working state, that is, controlling the rotation speed of the engine cooling fan to decrease until it is as low as the corresponding rotation speed of the engine cooling fan in the first working state. Controlling the transfer case to return to the working state refers to controlling the torque connection of the friction plates in the transfer case.

Step 210: When the internal oil temperature does not meet the first preset condition, control the transfer case to return to the working state after the cooling time, the cooling time is based on the number of overheating times of the transfer case and the internal The oil temperature is determined.

When it is judged in step 201 that the internal oil temperature does not meet the first preset condition, the transfer case is controlled to return to the working state after the heat dissipation period, and the heat dissipation period is determined according to the number of overheating times of the transfer case and The internal oil temperature is determined.

Specifically, the corresponding relationship between the heat dissipation duration (unit: second) and the number of overheating times of the transfer case and the internal oil temperature is shown in Table 1:

Table 1 Correspondence table of cooling time

It can be seen from Table 1 that when the internal oil temperature is ≤100°C, the number of overheating times of the transfer case is 3 times, that is, when the transfer case is overheated for the third time, the corresponding cooling time is 180 seconds. Based on the internal oil temperature and transfer case overheating times, determine the heat dissipation time of different gradients. The higher the internal oil temperature, the more transfer case overheating times, the longer the heat dissipation time, and the transfer case in the reverse gear condition can be more thoroughly controlled Perform heat dissipation to avoid ablation of the friction group in the transfer case, making the four-wheel drive more reliable.

When the internal oil temperature is >100°C, the corresponding heat dissipation time is longer than the heat dissipation time when the internal oil temperature is ≤100°C, and the internal oil temperature is >100°C.

Step 211: Judging whether the transfer case meets the heat dissipation requirement based on the current temperature of the friction plate set.

In this embodiment, it is judged based on the current temperature of the friction plate set whether the transfer case meets the heat dissipation requirement, specifically, it is judged whether the current friction plate set temperature is less than the first threshold, and if so, it means that the transfer case meets the heat dissipation requirement , re-execute step 201. Because the heat dissipation time is selected according to the corresponding relationship table in Table 1, under normal circumstances, the transfer case is in the torque-off state, and the engine cooling fan is in the second working state. After continuing the heat dissipation time corresponding to Table 1, the transfer case meet cooling requirements.

If the current temperature of the friction plate set is still higher than the first threshold, the transfer case is switched to the torque off state for a set time, and the set time is determined according to the difference between the current friction plate set temperature and the first threshold.

Based on the same inventive concept, this disclosure proposes a cold start device for a diesel engine. Referring to FIG. 4, FIG. 4 is a schematic diagram of a vehicle overheat protection control device in an embodiment of the disclosure. As shown in FIG. 4, the device includes:

The first obtaining module 301 is used to obtain the first temperature of the transfer case and the real-time vehicle condition information of the vehicle, and determine whether the first temperature meets the first preset condition;

The first judging module 302 is configured to judge whether the gear position of the vehicle is switched from the first gear position to the second gear position according to the gear position information of the vehicle;

A determining module 303, configured to determine the second temperature of the transfer case according to the real-time vehicle condition information;

A second judging module 304, configured to judge whether the second temperature satisfies a second preset condition when the first gear shifts to the second gear;

The first control module 305 is configured to control the heat dissipation components in the vehicle from the first working state when the first temperature satisfies the first preset condition and the second temperature satisfies the second preset condition switch to the second working state, and control the transfer case to switch from the working state to the torque off state, to dissipate heat from the transfer case;

The second control module 306 is configured to control the transfer case to switch from the working state to the torque when the first temperature does not meet the first preset condition and the second temperature meets the second preset condition In the disconnected state, the transfer case is dissipated.

Further, the device also includes:

The third control module is used to control the heat dissipation component to switch from the second working state back to the first working state after a corresponding heat dissipation period when the first temperature satisfies the first preset condition, and control the transfer The device returns to working status;

The fourth control module is used to control the transfer case to return to the working state after the heat dissipation period when the first temperature does not meet the first preset condition, and the heat dissipation period is based on the number of overheating times of the transfer case and the transfer case oil temperature determined.

A sending module, configured to send prompt information to an instrument of the vehicle, where the prompt information is used to indicate the current temperature value of the friction plate set;

A third judging module, configured to judge whether the transfer case meets heat dissipation requirements based on the current temperature of the friction plate set.

Specifically, the current temperature of the transfer case of the vehicle includes the current friction plate group temperature of the transfer case of the vehicle, and the real-time vehicle condition information also includes: the current wheel speed of the vehicle, the duration of the vehicle being turned off, the outdoor temperature and The engine output torque, the determination module 303, includes:

A first determining unit, configured to determine the current friction plate set temperature of the transfer case of the vehicle according to the vehicle's flameout duration, the current wheel speed, the outdoor temperature, the current gear and the engine output torque .

Further, the second judging module 304 is configured to judge whether the temperature of the current friction plate set is between the first threshold and the second threshold when the forward gear is switched to the reverse gear, and determine whether the current friction plate set temperature is between the first threshold and the second threshold Whether the temperature satisfies the third preset condition.

An embodiment of the present disclosure also provides a system, which includes the vehicle overheat protection control device.

An embodiment of the present disclosure also provides an electronic device, including: a processor;

memory having instructions stored thereon, and a computer program stored on said memory and operable on said processor, said computer program, when executed by said processor, causing said device to perform a vehicle overheat protection Control Method.

The present disclosure also provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program in the storage medium is executed by a processor of the electronic device, the electronic device The method for controlling overheating protection of a vehicle described above can be implemented.

The device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in One place, or it can be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without any creative effort.

The various component embodiments of the present disclosure may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all functions of some or all components in the computing processing device according to the embodiments of the present disclosure. The present disclosure can also be implemented as an apparatus or apparatus program (eg, computer program and computer program product) for performing a part or all of the methods described herein. Such a program realizing the present disclosure may be stored on a computer-readable medium, or may have the form of one or more signals. Such a signal may be downloaded from an Internet site, or provided on a carrier signal, or provided in any other form.

For example, FIG. 5 illustrates a computing processing device that may implement methods according to the present disclosure. The computing processing device conventionally includes a processor 1010 and a computer program product or computer readable medium in the form of memory 1020 . Memory 1020 may be electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), EPROM, hard disk, or ROM. The memory 1020 has a storage space 1030 for program codes for performing any method steps in the methods described above. For example, the storage space 1030 for program codes may include program codes for respectively implementing various steps in steps 101-106 and steps 201-211 of the above method. These program codes can be read from or written into one or more computer program products. These computer program products comprise program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. Such a computer program product is typically a portable or fixed storage unit as described with reference to FIG. 6 . The storage unit may have storage segments, storage spaces, etc. arranged similarly to the memory 1020 in the computing processing device of FIG. 5 . The program code can eg be compressed in a suitable form. Typically, the storage unit includes computer readable code 1031, i.e. code that can be read by, for example, a processor such as 1010, which code, when executed by a computing processing device, causes the computing processing device to perform the steps in the methods described above. various steps.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

Having described the preferred embodiments of the embodiments of the present disclosure, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the embodiments of the present disclosure. Reference herein to "one embodiment," "an embodiment," or "one or more embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Additionally, please note that examples of the word "in one embodiment" herein do not necessarily all refer to the same embodiment.

In this document, relational terms such as first and second etc. are used only to distinguish one entity or operation from another without necessarily requiring or implying any such relationship between these entities or operations. Actual relationship or sequence. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or terminal equipment comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements identified, or also include elements inherent in such a process, method, article, or terminal equipment. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising said element.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The disclosure can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

A method for controlling overheating protection of a vehicle, comprising:

Acquiring the first temperature of the transfer case and the real-time vehicle condition information of the vehicle, and judging whether the first temperature satisfies the first preset condition;

According to the gear position information of the vehicle, it is judged whether the gear position of the vehicle is switched from the first gear position to the second gear position;

determining the second temperature of the transfer case according to the real-time vehicle condition information;

When the first gear shifts to the second gear, judging whether the second temperature satisfies a second preset condition;

When the first temperature satisfies the first preset condition and the second temperature satisfies the second preset condition, controlling the heat dissipation components in the vehicle to switch from a first working state to a second working state , and control the transfer case to switch from the working state to the torque off state, to dissipate heat from the transfer case;

When the first temperature does not meet the first preset condition, and the second temperature satisfies the second preset condition, the transfer case is controlled to switch from the working state to the torque off state, and the The transfer case for heat dissipation.
The method according to claim 1, further comprising:

Obtain the number of transfer case overheating times in the current ignition cycle of the vehicle;

When the first temperature satisfies the first preset condition, after a corresponding heat dissipation time, control the heat dissipation component to switch from the second working state back to the first working state, and control the transfer case to return to the working state;

When the first temperature does not meet the first preset condition, the transfer case is controlled to return to the working state after the heat dissipation period, and the heat dissipation period is determined according to the number of overheating times of the transfer case and the first temperature .
The method of claim 1, wherein the first temperature is an internal oil temperature.
The method according to claim 1, characterized in that the second temperature is the current temperature of the friction plate set.
The method according to claim 4, wherein the real-time vehicle condition information further includes: the current wheel speed of the vehicle, the duration of the vehicle being turned off, the outdoor temperature, and the output torque of the engine, and according to the real-time vehicle condition information, determine a second temperature of the transfer case, comprising:

The current friction plate set temperature of the transfer case is determined according to the vehicle flameout duration, the current wheel speed, the outdoor temperature, the current gear and the engine output torque.
The method according to claim 4, wherein the first gear is a forward gear, the second gear is a reverse gear, and when the first gear switches to the second gear, , judging whether the second temperature satisfies a second preset condition, including:

When switching from a forward gear to a reverse gear, it is judged whether the current temperature of the friction plate set is between the first threshold and the second threshold, and whether the current temperature of the friction plate set satisfies a third preset condition.
The method according to claim 1, wherein the heat dissipation component is an engine cooling fan of the vehicle, and the rotation speed of the engine cooling fan in the second working state is greater than that in the first working state of the engine cooling fan speed of time.
A vehicle overheat protection control device, characterized in that it comprises:

The first acquisition module is used to acquire the first temperature of the transfer case and the real-time vehicle condition information of the vehicle, and judge whether the first temperature meets the first preset condition;

The first judging module is used to judge whether the gear position of the vehicle is switched from the first gear position to the second gear position according to the gear position information of the vehicle;

A determining module, configured to determine the second temperature of the transfer case according to the real-time vehicle condition information;

A second judging module, configured to judge whether the second temperature satisfies a second preset condition when the first gear shifts to the second gear;

The first control module is configured to control the heat dissipation components in the vehicle to be operated by the first when the first temperature satisfies the first preset condition and the second temperature satisfies the second preset condition. The state is switched to the second working state, and the transfer case is controlled to switch from the working state to the torque off state, so as to dissipate heat from the transfer case;

The second control module is used to control the transfer case to switch from the working state to the In the torque-off state, the transfer case is dissipated to dissipate heat.
The device according to claim 8, wherein the device further comprises:

The second acquisition module is used to acquire the number of overheating times of the transfer case in the current ignition cycle of the vehicle;

The third control module is configured to control the heat dissipation component to switch from the second working state back to the first working state after a corresponding heat dissipation period when the first temperature satisfies the first preset condition, and control the The transfer case returns to working condition;

A fourth control module, configured to control the transfer case to return to the working state after the heat dissipation period when the first temperature does not meet the first preset condition, and the heat dissipation period depends on the transfer case The number of times of overheating and the first temperature are determined.
A vehicle overheat protection control system, characterized by comprising: the vehicle overheat protection control device according to any one of claims 8 or 9.
A computer program comprising computer readable code, which, when run on a computing processing device, causes the computing processing device to execute the vehicle overheat protection control according to any one of claims 1-7 method.
A computer readable medium in which the computer program according to claim 11 is stored.