A clutch fan control method and device based on road information and a medium

Abstract

The application discloses a clutch fan control method and device based on road information and a medium, and the method comprises the following steps: acquiring vehicle information of a target vehicle and road slope information of an untraveled road section; the vehicle information at least comprises water temperature information and vehicle total weight information; acquiring downhill road section information of the untraveled road section based on the road slope information; determining expected torque of the target vehicle driving through the untraveled road section based on the downhill road section information and the vehicle total weight information; determining a water temperature rise value under the expected torque under the condition that the fan stops rotating; determining expected water temperature of the target vehicle driving through the untraveled road section based on the water temperature rise value and the water temperature information; and controlling the fan to stop rotating through an automobile electronic control unit if the expected water temperature is lower than an engine allowable temperature. The water temperature change of the coolant is estimated based on actual road information, the fan power consumption is saved under the premise of ensuring the reliability of the engine, and thus the fuel consumption is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of control adjustment system, in particular to a clutch fan control method and device based on road information and medium. BACKGROUND

[0002] In recent years, the electric control silicon oil clutch fan is an energy-saving fan that realizes fast and slow rotation according to external conditions such as coolant temperature and intake air temperature and is controlled by an ECU. The engagement rate is controlled by controlling the amount of silicon oil. A rotation speed sensor is arranged on the clutch to input a pulse signal to the ECU. A fan blade is arranged on the clutch.

[0003] Taking the coolant temperature as an example, the existing control strategy controls the fan based on the current state of the coolant temperature of the engine. Based on the complex and changeable road conditions, the corresponding curve of the coolant and the fan speed is generally set to be relatively conservative to improve the robustness, but it is not optimal for the economy of the whole vehicle. SUMMARY

[0004] To solve the above problems, the present application provides a clutch fan control method and device based on road information and medium, wherein the method comprises:

[0005] Obtain vehicle information of a target vehicle and road slope information of an untraveled section; the vehicle information at least includes water temperature information and vehicle total weight information; obtain downhill section information of the untraveled section based on the road slope information; determine an expected torque of the target vehicle driving through the untraveled section based on the downhill section information and the vehicle total weight information; determine a water temperature rise value under the expected torque under the condition that the fan stops rotating; determine an expected water temperature of the target vehicle driving through the untraveled section based on the water temperature rise value and the water temperature information; if the expected water temperature is lower than an engine allowable temperature, control the fan to stop rotating by an automobile electronic control unit.

[0006] In one example, the method further comprises: determining that the downhill section information does not exist in the road slope information, or the expected water temperature is higher than the engine allowable temperature; obtaining a current water temperature, torque and vehicle speed table of the target vehicle, and controlling the fan according to the water temperature, torque and vehicle speed table.

[0007] In one example, the obtaining of the downhill section information of the untraveled section based on the road slope information specifically comprises: obtaining an initial road slope of each section point of the untraveled section; reconstructing the road slope with a slope value at a current time of the target vehicle to obtain a reconstructed road slope; dividing the untraveled section into a plurality of sub-sections based on a preset road slope judgment threshold, so that the reconstructed road slope of each section point in a single sub-section is within the preset road slope judgment threshold.

[0008] In one example, the determining the expected torque of the target vehicle driving through the untraveled road section based on the downhill road section information and the total weight information of the target vehicle specifically comprises: obtaining current speed data and current gear data of the target vehicle; determining a road slope and a road friction coefficient corresponding to the downhill road section based on the downhill road section information; and determining the expected torque of the target vehicle driving through the untraveled road section based on the road slope, the road friction coefficient, the current speed data and the current gear data.

[0009] In one example, the determining the water temperature rise value at the expected torque specifically comprises: obtaining expected torque and instantaneous speed of the target vehicle at each time point respectively; determining water temperature instantaneous rise rate of the target vehicle at the each time point respectively based on a preset water temperature rise rate table; and integrating the water temperature instantaneous rise rate at the each time point respectively to obtain the water temperature rise value.

[0010] In one example, the method further comprises: obtaining current water temperature information of the target vehicle; determining real-time water temperature information of the target vehicle on the untraveled road section based on the current water temperature information and the water temperature rise value; determining a fan control time of the target vehicle based on the real-time water temperature information and the engine allowable temperature; and controlling the fan through a water temperature, torque and speed table at the fan control time.

[0011] In one example, the method further comprises: obtaining uphill road section information of the untraveled road section based on the road slope information; determining real-time water temperature information of the target vehicle on the uphill road section; determining a fan control time of the target vehicle based on the real-time water temperature information and the engine allowable temperature; stopping the fan through an automobile electronic control unit before the fan control time; and controlling the fan through a water temperature, torque and speed table at the fan control time.

[0012] In one example, the obtaining vehicle information of the target vehicle and road slope information of the untraveled road section specifically comprises: determining an expected driving route of the target vehicle based on a navigation path of the target vehicle; and obtaining road slope information within a preset range of the target vehicle in the expected driving route.

[0013] The application further provides a clutch fan control device based on road information, comprising: at least one processor; and a memory in communication connection with 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 to enable the at least one processor to perform: obtaining vehicle information of a target vehicle and road slope information of an untraveled road section; the vehicle information at least comprises water temperature information and vehicle total weight information; obtaining downhill road section information of the untraveled road section based on the road slope information; determining an expected torque of the target vehicle driving through the untraveled road section based on the downhill road section information and the vehicle total weight information; determining a water temperature rise value under the expected torque under the condition that the fan stops rotating; determining an expected water temperature of the target vehicle driving through the untraveled road section based on the water temperature rise value and the water temperature information; and controlling the fan to stop rotating through an automobile electronic control unit if the expected water temperature is lower than an engine allowable temperature.

[0014] The application further provides a non-volatile computer storage medium storing computer executable instructions, which are configured to: obtain vehicle information of a target vehicle and road slope information of an untraveled road section; the vehicle information at least comprises water temperature information and vehicle total weight information; obtain downhill road section information of the untraveled road section based on the road slope information; determine an expected torque of the target vehicle driving through the untraveled road section based on the downhill road section information and the vehicle total weight information; determine a water temperature rise value under the expected torque under the condition that the fan stops rotating; determine an expected water temperature of the target vehicle driving through the untraveled road section based on the water temperature rise value and the water temperature information; and control the fan to stop rotating through an automobile electronic control unit if the expected water temperature is lower than an engine allowable temperature.

[0015] The method provided by the application can bring the following beneficial effects: the water temperature change of the cooling liquid is estimated through actual road information, the fan power consumption is saved under the premise of ensuring the reliability of the engine, and thus the fuel consumption is reduced. The whole scheme is based on the existing configuration of the vehicle, and no additional configuration is needed, thereby saving the configuration cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate certain illustrative embodiments of the application and together with the description serve to explain the application. In the drawings:

[0017] Figure 1 FIG. 1 is a flowchart of a clutch fan control method based on road information in an embodiment of the application;

[0018] Figure 2A sub-road section corresponding to the target vehicle and a corresponding road temperature diagram in an embodiment of the present application;

[0019] Figure 3 A water temperature, torque and vehicle speed comparison diagram in an embodiment of the present application;

[0020] Figure 4 A structure diagram of a clutch fan control device based on road information in an embodiment of the present application. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in detail with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the drawings.

[0023] Figure 1 A flow diagram of a clutch fan control method based on road information provided by one or more embodiments of the present application. The flow can be executed by a corresponding control computing device of the clutch, and some input parameters or intermediate results in the flow allow manual intervention adjustment to help improve accuracy.

[0024] The implementation of the analysis method related to the embodiments of the present application can be a terminal device or a server, and the present application does not make special limitations thereon. For the convenience of understanding and description, the following embodiments are described in detail with the server as an example.

[0025] It should be noted that the server can be a separate device or a system composed of multiple devices, i.e. a distributed server, and the present application does not make specific limitations thereon.

[0026] In the existing fan control strategy, the speed of the fan is determined according to the size of the water temperature. Since the maximum bearing temperature of the engine has a certain allowable value, in some scenarios, the fan can be temporarily suspended, such as when the current water temperature reaches 95 degrees, but the road ahead is a large downhill, the engine will reduce or stop power output, and it can be predicted that the water temperature will not rise or fall much (will not reach the maximum bearing temperature), at this time the fan can be controlled not to run at the speed corresponding to 95 degrees, to save fuel consumption.

[0027] As shown in Figure 1 The embodiments of the present application provide a clutch fan control method based on road information, which comprises:

[0028] S101: Obtain vehicle information of the target vehicle and road slope information of the unexplored road section; vehicle information includes at least water temperature information and total vehicle weight information.

[0029] First, it is necessary to obtain the vehicle information of the target vehicle and the road slope information corresponding to the uncharted road section to be entered. It should be noted that the vehicle information here should at least include the coolant temperature and the vehicle's total weight. The coolant temperature refers to the temperature of the coolant in the clutch, and the road slope information includes the curvature, coefficient of friction, and gradient of the road.

[0030] In one embodiment, when acquiring road slope information, the expected driving route of the target vehicle is first determined based on the navigation path of the target vehicle, and then the road slope information within a preset range of the target vehicle is acquired within the expected driving route.

[0031] S102: Obtain downhill section information of unused road sections based on road slope information.

[0032] By obtaining the road slope information, it is determined that the target vehicle will be traversing a downhill section. At this point, it is necessary to obtain the downhill section information. It should be noted that this downhill section information should include the corresponding road slope information and the length of the downhill section.

[0033] In one embodiment, such as Figure 2 As shown, when obtaining downhill road information, it is necessary to obtain the initial road slope of the untouched road segment at each road segment point; and reconstruct the road slope using the slope value of the target vehicle at the current time, that is, set the road slope at the current time to zero, and appropriately adjust the road slope corresponding to other untouched road segments to obtain the reconstructed road slope; based on the preset road slope judgment threshold, the untouched road segment is divided into multiple sub-segments so that the reconstructed road slope of each road segment point in a single sub-segment is within the preset road slope judgment threshold.

[0034] S103: Based on downhill road information and vehicle total weight information, determine the expected torque of the target vehicle when it passes through unexplored road sections.

[0035] After determining the downhill section information and the vehicle's total weight, it is necessary to calculate the expected torque required for the target vehicle to traverse this downhill section. The expected torque here refers to the torque required to pass through this downhill section.

[0036] In one embodiment, in determining the expected torque required for the target vehicle to drive through the untraveled section, current vehicle speed data and current gear data of the target vehicle are required; then the road slope and road friction coefficient corresponding to the downhill section are determined based on the downhill section information. Then, based on the road slope, road friction coefficient, and current vehicle speed data and current gear data, the expected torque of the target vehicle driving through the untraveled section is determined.

[0037] S104: Determine the water temperature rise value at the expected torque under the condition that the fan stops rotating.

[0038] After the expected torque is determined, the water temperature rise value corresponding to the expected torque is determined if the fan stops rotating according to the expected torque.

[0039] In one embodiment, in determining the water temperature rise value, the expected torque and instantaneous vehicle speed of the target vehicle at each time point are required, and then the water temperature instantaneous rise rate of the target vehicle at each time point is determined based on a preset water temperature rise rate table; the water temperature instantaneous rise rate at each time point is integrated to obtain the water temperature rise value. Figure 3 A water temperature, torque and vehicle speed table, wherein the x-axis is the expected torque, the y-axis is the current vehicle speed, and the values in the table are the water temperature rise rates corresponding to the current torque and vehicle speed. In the calculation, the driving time is calculated by the road section length and the driving speed, and then the instantaneous rise rate is integrated to obtain the water temperature rise value when driving to the starting point of the downhill.

[0040] Further, in addition to determining the expected water temperature corresponding to the untraveled section and then determining the fan control time, the fan control time can also be determined according to the real-time water temperature of the target vehicle. Specifically, the current water temperature information of the target vehicle is required, and the real-time water temperature information of the target vehicle on the untraveled section is determined according to the current water temperature information and the water temperature rise value; then the fan control time of the target vehicle is determined based on the real-time water temperature information and the engine allowable temperature; at the fan control time, the fan is controlled through the water temperature, torque and vehicle speed table.

[0041] S105: Determine the expected water temperature of the target vehicle driving through the untraveled section based on the water temperature rise value and the water temperature information.

[0042] According to the existing water temperature information of the target vehicle and the water temperature rise value, the expected water temperature corresponding to the untraveled section of the target vehicle can be determined.

[0043] S106: If the expected water temperature is lower than the engine allowable temperature, the fan is controlled to stop rotating by the automobile electronic control unit.

[0044] If the expected water temperature is lower than the engine allowable temperature corresponding to the target vehicle, the fan can be controlled to stop by the automobile electronic control unit to save energy.

[0045] In one embodiment, if it can be determined based on the road slope information that the untraveled road of the target vehicle is an uphill road, or the expected water temperature of the target vehicle after traveling on a downhill road is higher than the engine allowable temperature, the current water temperature, torque and vehicle speed table of the target vehicle is obtained, and the fan is controlled according to the water temperature, torque and vehicle speed table, that is, the fan speed is controlled in the existing manner.

[0046] In one embodiment, if there is only an uphill road in the untraveled section of the target vehicle, or the road section is complex and uphill and downhill roads alternate, the control time of the target vehicle can be determined based on the real-time water temperature information predicted by the target vehicle. Specifically, the real-time water temperature information of the target vehicle in the uphill road section needs to be determined; the fan control time of the target vehicle is determined based on the real-time water temperature information and the engine allowable temperature; the fan is controlled to stop by the automobile electronic control unit before the fan control time; and the fan is controlled by the water temperature, torque and vehicle speed table at the fan control time.

[0047] The engine allowable temperature, the preset water temperature rising rate table, the water temperature, torque and vehicle speed table can be pre-stored in the storage device of the computer device. When the fan speed needs to be controlled, the computer device can select the engine allowable temperature, the preset water temperature rising rate table, the water temperature, torque and vehicle speed table from the storage device. Of course, the computer device can also obtain the engine allowable temperature, the preset water temperature rising rate table, the water temperature, torque and vehicle speed table from other external devices. For example, the engine allowable temperature, the preset water temperature rising rate table, the water temperature, torque and vehicle speed table are stored in the cloud. When the fan speed needs to be controlled, the computer device can obtain the engine allowable temperature, the preset water temperature rising rate table, the water temperature, torque and vehicle speed table from the cloud. The embodiment does not limit the acquisition method of the engine allowable temperature, the preset water temperature rising rate table, the water temperature, torque and vehicle speed table.

[0048] As shown in Figure 4 The embodiment of the present application also provides a clutch fan control device based on road information, which comprises at least one processor and a memory in communication connection with 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 to enable the at least one processor to:

[0049] Obtain vehicle information of the target vehicle and road slope information of the untraveled road section; the vehicle information at least includes water temperature information and vehicle gross weight information; obtain downhill road section information of the untraveled road section based on the road slope information; determine expected torque of the target vehicle driving through the untraveled road section based on the downhill road section information and the vehicle gross weight information; determine water temperature rise value under the expected torque under the condition that the fan stops rotating; determine expected water temperature of the target vehicle driving through the untraveled road section based on the water temperature rise value and the water temperature information; and control the fan to stop rotating by the automobile electronic control unit if the expected water temperature is lower than the engine allowable temperature.

[0050] The embodiment of the present application further provides a nonvolatile computer storage medium, which stores computer executable instructions, and the computer executable instructions are configured as follows:

[0051] Obtain vehicle information of the target vehicle and road slope information of the untraveled road section; the vehicle information at least includes water temperature information and vehicle gross weight information; obtain downhill road section information of the untraveled road section based on the road slope information; determine expected torque of the target vehicle driving through the untraveled road section based on the downhill road section information and the vehicle gross weight information; determine water temperature rise value under the expected torque under the condition that the fan stops rotating; determine expected water temperature of the target vehicle driving through the untraveled road section based on the water temperature rise value and the water temperature information; and control the fan to stop rotating by the automobile electronic control unit if the expected water temperature is lower than the engine allowable temperature.

[0052] The embodiments in the present application are described in a progressive manner, and the same and similar parts of each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments. Especially, the device and medium embodiments are described simply because they are basically similar to the method embodiments, and the related parts can be referred to the part of the method embodiment.

[0053] The device and medium provided by the embodiment of the present application are one-to-one corresponding to the method, so the device and medium also have the similar beneficial technical effects as the method. Since the beneficial technical effects of the method have been described in detail above, the beneficial technical effects of the device and medium will not be described here.

[0054] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

[0055] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0056] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0057] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0058] In one typical configuration, the computing device includes one or more processors, input / output interfaces, network interfaces, and memory.

[0059] The memory can include non-persistent memory and / or persistent memory, such as flash memory, read-only memory (ROM), and / or volatile or non-volatile random access memory (RAM), among others. The memory is an example of computer-readable media.

[0060] Computer-readable media includes permanent and non-permanent, movable and non-movable media that can implement information storage by any method or technology. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible to a computing device. According to the definition herein, computer-readable media does not include transitory media such as modulated data signals and carriers.

[0061] It should also be noted that the terms "comprising", "containing", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or apparatus that comprises a list of elements does not only include those elements, but can also include other elements not expressly listed or inherent to such process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus that includes the element.

[0062] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A clutch fan control method based on road information, characterized by, The method comprises the following steps: obtaining vehicle information of a target vehicle and road slope information of an untraveled road section; the vehicle information at least includes water temperature information and vehicle gross weight information; obtaining downhill road section information of the untraveled road section based on the road slope information; determining the expected torque of the target vehicle driving through the untraveled road section based on the downhill road section information and the vehicle gross weight information; determining the water temperature rise value under the expected torque under the condition that the fan stops rotating; determining the expected water temperature of the target vehicle driving through the untraveled road section based on the water temperature rise value and the water temperature information; if the expected water temperature is lower than the engine allowable temperature, the fan is controlled to stop rotating through the automobile electronic control unit.

2. The method of claim 1, wherein, The method further comprises: determining that the downhill road section information does not exist in the road slope information, or the expected water temperature is higher than the engine allowable temperature; obtaining a current water temperature, torque and vehicle speed table of the target vehicle, and controlling the fan according to the water temperature, torque and vehicle speed table.

3. The method of claim 1, wherein, The method further comprises: obtaining the initial road slope of each road section point of the untraveled road section; reconstructing the road slope with the slope value at the current time of the target vehicle to obtain the reconstructed road slope; based on a preset road slope judgment threshold, the untraveled road section is divided into multiple sub-road sections, so that the reconstructed road slope of each road section point in a single sub-road section is within the preset road slope judgment threshold.

4. The method of claim 1, wherein, The method further comprises: obtaining current vehicle speed data and current gear data of the target vehicle; determining the road slope and road friction coefficient corresponding to the downhill road section based on the downhill road section information; determining the expected torque of the target vehicle driving through the untraveled road section based on the road slope, the road friction coefficient, and the current vehicle speed data and the current gear data.

5. The method of claim 1, wherein, The method further comprises: obtaining the expected torque and instantaneous vehicle speed of the target vehicle at each time point respectively; determining the water temperature instantaneous rise rate of the target vehicle at each time point respectively based on a preset water temperature rise rate table; integrating the water temperature instantaneous rise rate at each time point respectively to obtain the water temperature rise value.

6. The method of claim 5, wherein, The method further comprises: obtaining the current water temperature information of the target vehicle, and determining the real-time water temperature information of the target vehicle on the untraveled road section based on the current water temperature information and the water temperature rise value; determining the fan control time of the target vehicle based on the real-time water temperature information and the engine allowable temperature; controlling the fan through the water temperature, torque and vehicle speed table at the fan control time.

7. The method of claim 1, wherein, The method further comprises: obtaining uphill road section information of the untraveled road section based on the road slope information; determining the real-time water temperature information of the target vehicle in the uphill road section; determining a fan control time of the target vehicle based on the real-time water temperature information and the engine allowable temperature; controlling the fan to stop rotating by the automobile electronic control unit before the fan control time, and controlling the fan by a water temperature, torque and vehicle speed comparison table at the fan control time.

8. The method of claim 1, wherein, The vehicle information of the target vehicle and the road slope information of the untraveled road section are specifically obtained by: determining an expected driving route of the target vehicle based on a navigation path of the target vehicle; obtaining road slope information within a preset range of the target vehicle in the expected driving route.

9. A road information-based clutch fan control apparatus characterized by comprising: comprise: at least one processor; and a memory connected in communication with 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 to enable the at least one processor to perform: obtaining vehicle information of a target vehicle and road slope information of an untraveled road section; the vehicle information at least includes water temperature information and vehicle total weight information; obtaining downhill road section information of the untraveled road section based on the road slope information; determining an expected torque of the target vehicle driving through the untraveled road section based on the downhill road section information and the vehicle total weight information; determining a water temperature rise value under the expected torque under the condition that the fan stops rotating; determining an expected water temperature of the target vehicle driving through the untraveled road section based on the water temperature rise value and the water temperature information; if the expected water temperature is lower than the engine allowable temperature, controlling the fan to stop rotating by the automobile electronic control unit.

10. A non-transitory computer storage medium storing computer-executable instructions, the computer-executable instructions comprising instructions for: receiving a request to access a file; determining whether the file is stored in a cache; and in response to determining that the file is stored in the cache, providing access to the file from the cache. The computer executable instructions are configured to: obtain vehicle information of a target vehicle and road slope information of an untraveled road section; the vehicle information at least includes water temperature information and vehicle total weight information; obtain downhill road section information of the untraveled road section based on the road slope information; determining an expected torque of the target vehicle driving through the untraveled road section based on the downhill road section information and the vehicle total weight information; determining a water temperature rise value under the expected torque under the condition that the fan stops rotating; determining an expected water temperature of the target vehicle driving through the untraveled road section based on the water temperature rise value and the water temperature information; if the expected water temperature is lower than the engine allowable temperature, controlling the fan to stop rotating by the automobile electronic control unit.

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