An automobile heat dissipation fan control method and device and vehicle

Abstract

The embodiment of the application provides a kind of automobile radiating fan control method, device and vehicle, it is related to automobile radiating fan control technical field, after determining that the whole vehicle is in upper high pressure or charging state, engine water temperature correction is carried out based on current driving environment and vehicle state parameter, obtain the first duty cycle;Air conditioner temperature correction is carried out based on current vehicle speed and air conditioner running condition, obtain the second duty cycle;The temperature of remaining components is corrected based on current vehicle speed and the temperature of preset component, obtain the third duty cycle;Maximum value is taken in the above-mentioned correction duty cycle, as the target duty cycle of control radiating fan operation.The application obtains all aspects of radiating consideration according to the correction of different component temperature angle, and after weighing selection, the control precision of automobile radiating fan is higher, and the service life of automobile component can be prolonged.

Description

[0001] Embodiments of the present application relate to the technical field of automobile radiator fan control, and in particular to an automobile radiator fan control method, device and vehicle.

[0002] At present, the control of the automobile radiator fan is mostly to simply obtain the temperature information of the device to be radiated, and then to convert the radiator fan rotating speed by the temperature information and the engine water pump opening degree to perform duty cycle control. When the engine is configured with a mechanical water pump, the fan control precision is affected, and the radiating effect is not ideal. In fact, with the change of the running environment and the running condition, the capacity of the radiator fan also changes, and therefore it is necessary to optimize the control strategy of the radiator fan to match the vehicle running condition and the environment.

[0003] Embodiments of the present application provide an automobile radiator fan control method, device and vehicle, which relate to the technical field of automobile radiator fan control, and can optimize the automobile fan control and improve the stability of the fan control when the vehicle condition changes.

[0004] In a first aspect, embodiments of the present application provide an automobile radiator fan control method, which comprises:

[0005] judging the power supply mode of the vehicle;

[0006] after determining that the vehicle is in the high-voltage or charging state, correcting the engine water temperature based on the current driving environment and the vehicle state parameters to obtain a first duty cycle of the radiator fan;

[0007] correcting the air conditioner temperature based on the current vehicle speed and the air conditioner operation to obtain a second duty cycle of the radiator fan;

[0008] correcting the temperature of the remaining components based on the current vehicle speed and the temperature of the preset components to obtain a third duty cycle of the radiator fan;

[0009] taking the maximum value of the first duty cycle, the second duty cycle and the third duty cycle to obtain a target duty cycle request value;

[0010] controlling the radiator fan to operate based on the target duty cycle request value.

[0011] In at least one possible implementation manner, the correction of the engine water temperature based on the current driving environment and the vehicle state parameters comprises:

[0012] determining a first initial duty cycle based on the current engine speed and the engine load;

[0013] ​​​According to the engine water temperature, the actual torque of the engine and the calculated target torque, a first correction coefficient pre-calibrated is obtained;

[0014] According to the current vehicle speed, a second correction coefficient pre-calibrated is obtained; and,

[0015] According to the multi-dimensional information of the current driving scene, a plurality of third correction coefficients pre-calibrated are obtained;

[0016] The first initial duty ratio is fused with the first correction coefficient, the second correction coefficient and the third correction coefficients to obtain the first duty ratio.

[0017] In at least one possible implementation, the obtaining of the third duty ratio of the cooling fan includes:

[0018] According to at least the water temperature of the motor water channel and the duty ratio request value of the motor water pump, a second initial duty ratio is obtained by querying a pre-calibrated reference table;

[0019] The second initial duty ratio is fused with the second correction coefficient to obtain a third duty ratio.

[0020] In at least one possible implementation, the manner of determining the first initial duty ratio includes:

[0021] A reference table is constructed by pre-calibrating the temperature corresponding to each engine load at different engine speed values, balancing the duty ratio value in a given temperature range;

[0022] The current engine speed and engine load are used to query the reference table to determine the first initial duty ratio under the current engine operating condition.

[0023] In at least one possible implementation, the control method further includes: detecting whether the engine or the motor or the motor controller exceeds a preset temperature threshold; if so, controlling the cooling fan to operate according to a preset maximum limit of the duty ratio.

[0024] In at least one possible implementation, the control method further includes: after determining that the whole vehicle is in a power-off process, deciding the operating state of the cooling fan according to the power-off duration and the temperature of the engine and / or the preset components.

[0025] The technical functions of this solution can be seen as follows: After determining that the vehicle is in a high-voltage or charging state, the engine coolant temperature is corrected based on the current driving environment and vehicle status parameters to obtain the first duty cycle; the air conditioning temperature is corrected based on the current vehicle speed and air conditioning operation to obtain the second duty cycle; the temperature of other components is corrected based on the current vehicle speed and the temperature of preset components to obtain the third duty cycle; the maximum value among the above corrected duty cycles is taken as the target duty cycle for controlling the operation of the cooling fan.

[0026] As can be seen, this application selects a corresponding control strategy based on current external environmental information and vehicle operating parameters to rationally control the opening and closing of the cooling fan, reducing the temperature to a safe level. This ensures the normal operation of all vehicle components and reduces unnecessary energy loss. Furthermore, through torque deviation correction logic, the stability of cooling fan control can be significantly improved when vehicle operating conditions change. In addition, by introducing load judgment conditions, precise control of the cooling fan can also be achieved based on the mechanical water pump. This application improves the control precision of automotive fans, extends the service life of components, and also provides a better driving experience.

[0027] Secondly, embodiments of this application provide an automotive cooling fan control device, the device comprising:

[0028] The vehicle status detection module is used to determine the power supply mode of the entire vehicle;

[0029] The first correction module is used to correct the engine coolant temperature based on the current driving environment and vehicle status parameters after determining that the vehicle is in a high voltage or charging state, and to obtain the first duty cycle of the cooling fan.

[0030] The second correction module is used to correct the air conditioning temperature based on the current vehicle speed and air conditioning operation status, and to obtain the second duty cycle of the cooling fan.

[0031] The third correction module is used to correct the temperature of other components based on the current vehicle speed and the temperature of preset components, so as to obtain the third duty cycle of the cooling fan.

[0032] The target duty cycle calculation module is used to take the maximum value among the first duty cycle, the second duty cycle, and the third duty cycle to obtain the target duty cycle request value;

[0033] A cooling fan control module is used to control the operation of the cooling fan based on the target duty cycle request value.

[0034] In a third aspect, an electronic device is provided, including one or more processors, a memory, and one or more computer programs, the memory can be a non-volatile storage medium, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions that, when executed by the device, cause the electronic device to perform the method of the first aspect or any possible implementation manner of the first aspect.

[0035] In a fourth aspect, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program, when the computer program is run on a computer, the computer program causes the computer to perform the method of the first aspect or any possible implementation manner of the first aspect.

[0036] In a fifth aspect, a vehicle is provided, and the vehicle includes the electronic device of the third aspect, and the computer readable storage medium of the fourth aspect.

[0037] It should be understood that the second to fifth aspects of the embodiments of the present application are consistent with the technical solution of the first aspect of the embodiments of the present application, and the beneficial effects obtained by each aspect and the corresponding feasible implementation manner are similar, and will not be described again. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0039] Figure 1 A flowchart of an automobile heat dissipation fan control method provided by the embodiments of the present application is shown.

[0040] Figure 2 A structural diagram of an automobile heat dissipation fan control device provided by the embodiments of the present application is shown. DETAILED DESCRIPTION

[0041] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the drawings.

[0042] It should be clear that the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0043] The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the specification. As used in the embodiments of the present application and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0044] In view of the foregoing heat dissipation fan control status, the embodiments of the present application provide a vehicle heat dissipation fan control method, in which a corresponding control strategy is selected according to current external environment information and vehicle operating parameters to reasonably control the on-off of the heat dissipation fan, so that the temperature is reduced to a safe temperature, thereby ensuring the normal operation of various components of the vehicle and reducing unnecessary energy loss. The present application improves the control accuracy of the automobile fan, prolongs the service life of the components, and also provides a good driving experience.

[0045] The technical solutions protected by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0046] Please refer to Figure 1 A flowchart of a vehicle heat dissipation fan control method provided by the embodiments of the present application is shown. The flow of the method is described as follows:

[0047] Step S1, judging the power supply mode of the vehicle;

[0048] Step S2, after determining that the vehicle is in the high-voltage or charging state, correcting the engine water temperature based on the current driving environment and vehicle state parameters to obtain a first duty cycle of the heat dissipation fan;

[0049] Here, the engine water temperature correction is made in consideration of the fact that in different environments and vehicle conditions, simply relying on the water temperature and engine speed (associated with the opening degree of the mechanical water pump) to control the heat dissipation fan is unreliable and does not meet the needs of real working conditions. Therefore, by comprehensively considering the factors affecting the engine water temperature and the control accuracy of the fan through the sensing system, the positioning system and the running data of the vehicle, the first duty cycle data for driving the electronic fan to operate is obtained.

[0050] In detail, the engine water temperature correction based on the current driving environment and vehicle state parameters includes:

[0051] determining a first initial duty cycle based on the current engine speed and engine load;

[0052] obtaining a first correction coefficient pre-calibrated according to the engine water temperature, the actual torque of the engine and the calculated target torque;

[0053] obtaining a second correction coefficient pre-calibrated according to the current vehicle speed; and

[0054] According to the multi-dimensional information of the current driving scene, a plurality of third correction coefficients are obtained by pre-calibration;

[0055] The first initial duty ratio is fused with the first correction coefficient, the second correction coefficient and the third correction coefficient to obtain the first duty ratio.

[0056] The foregoing manner of obtaining the initial duty ratio can be as follows: the initial duty ratio under the current driving condition of the engine can be determined by querying a preset reference table (which can be calibrated by using the above-mentioned automobile state parameters, for example, calibration is carried out in the range of 80-90 degrees of engine water temperature, and the duty ratio of the electronic fan is controlled so that the temperature corresponding to each load at different speed values is balanced in the range of 80-90 degrees Celsius).

[0057] Then, based on the corresponding relationship between the engine water temperature and the difference between the actual torque and the target torque (which can also be a second reference table that is pre-calibrated), the engine operating condition correction coefficient γ can be obtained.

[0058] It can be pointed out that the consideration of this link is that the engine water temperature will be affected by the engine load, and the deviation between the actual torque of the engine and the calculated target torque will also affect the accuracy of the cooling fan control, so the engine load is considered to obtain the initial duty ratio, and then the correction coefficient γ is obtained by torque control.

[0059] The foregoing reference implementation example of obtaining the second and third correction coefficients is as follows:

[0060] Speed correction: the vehicle speed can be calculated according to the wheel speed sensor, and the speed correction coefficient β can be obtained by querying the reference table;

[0061] One of the multi-dimensional information of the current driving scene is the slope correction: the slope of the vehicle can be obtained according to the HCU internal slope recognition module, and the slope correction coefficient i can be obtained by querying the reference table;

[0062] One of the multi-dimensional information of the current driving scene is the ambient temperature correction: the ambient temperature can be obtained according to the external sensor, and the temperature correction coefficient j can be obtained by querying the reference table;

[0063] One of the multi-dimensional information of the current driving scene is the altitude correction: the ambient pressure can be obtained according to the external sensor, and the altitude correction coefficient k can be obtained by querying the reference table;

[0064] The principle considered in the above modification can be referred to as follows: the vehicle can appropriately reduce the fan drive duty ratio during the uphill stage to improve the climbing power performance of the entire vehicle; and the vehicle can appropriately reduce the fan drive duty ratio during the downhill stage to save the energy consumption of the vehicle by using the sliding power of the entire vehicle to drive the fan speed to take away the excess heat energy of the system; in addition, as can be understood by those skilled in the art, the greater the vehicle speed and the higher the ambient temperature, the worse the heat dissipation effect, and the more likely it is to need auxiliary heat dissipation; and the lower the temperature, the better the heat dissipation effect, and the less the need for auxiliary heat dissipation; similarly, the environmental pressure is greater in low-altitude areas, so the ambient temperature is higher and the altitude is lower, and the fan drive duty ratio can be appropriately reduced; and when the ambient temperature is lower and the altitude is higher, the fan drive duty ratio can be appropriately increased.

[0065] Finally, the first initial duty ratio can be multiplied by i, j, k, β, and γ to obtain the first duty ratio A of the heat dissipation fan.

[0066] In the foregoing, step S3 is based on the current vehicle speed and the air conditioner operating condition to modify the air conditioner temperature to obtain the second duty ratio of the heat dissipation fan;

[0067] To this end, it can be explained that when the vehicle is powered on and is driving or creeping or charging, if the cabin refrigeration is turned on or there is a battery refrigeration demand, in order to maintain the pipe pressure of the air conditioning system stable at this time, the heat generated by the air conditioner can be taken away by the operation of the heat dissipation fan to adjust the pipe pressure of the air conditioning system, and thus, according to the analysis, the present embodiment proposes to add the relationship between the pipe pressure of the air conditioner and the vehicle speed, and to query the comparison table (which can be calibrated) to obtain the duty ratio request B for the current air conditioner operating condition.

[0068] Step S4 is based on the current vehicle speed and the temperature condition of the preset components to modify the temperature of the remaining components to obtain the third duty ratio of the heat dissipation fan.

[0069] Regarding the temperature modification of the remaining preset vehicle components, for example, the second initial duty ratio can be obtained by querying the pre-calibrated comparison table according to the water temperature of the motor waterway and the duty ratio request value of the motor water pump; and then the second initial duty ratio value is multiplied by the vehicle speed modification coefficient β (the second modification coefficient) mentioned in the foregoing to obtain the third duty ratio request C (the consideration of this link is that according to the installation position of the heat dissipation fan, factors such as the remaining components that generate heat other than the engine and the air conditioner can be added; since the motor is only taken as an example in this embodiment, it can be understood that in actual operation, the third duty ratio can not be limited to one).

[0070] Step S5 is to take the maximum value of the first duty ratio, the second duty ratio, and the third duty ratio to obtain the target duty ratio request value.

[0071] Step S6, controlling the cooling fan operation based on the target duty cycle request value.

[0072] It can also be added here that the above control using the maximum value of the three corrected duty cycles is mainly for most cases. However, in real scenarios, other abnormal conditions may also occur, such as over-temperature of parts, at which time the above scheme is not optimal. Therefore, in some other preferred embodiments of the present application, the control method further comprises: detecting whether the engine and / or motor and / or motor controller exceeds a preset temperature threshold, for example, engine water temperature > 110℃C (calibratable, hysteresis 5℃), P1 / P3 motor temperature > 135℃ (calibratable, hysteresis 5℃), P1&P3 motor controller temperature > 85℃C (calibratable, hysteresis 5℃C), if any of the above conditions occurs, the HCU controls the operation of the cooling fan according to the preset high limit of the duty cycle (i.e. fixed control, fan full on).

[0073] Finally, it can also be pointed out that the aforementioned judgment of the vehicle power supply mode can at least include the following two types in addition to the high voltage or charging:

[0074] First, when it is determined that the vehicle is in the power-off process, the running state of the cooling fan can be decided according to the power-off duration and the temperature of the engine and / or preset parts.

[0075] For example, if the vehicle power-off duration < 40s (calibratable), and the engine water temperature > 110℃ (calibratable), or the temperature of other parts (for example, P1&P3 motor temperature > 135℃ (calibratable)), the HCU controls the fan full on according to the preset high limit of the duty cycle; if the temperature of the engine and other parts is not high or the vehicle power-off duration ≥ 40s, the cooling fan can be controlled to be off.

[0076] Second, when it is determined that the vehicle is not powered on, it can be understood that the HCU controls the cooling fan to be off, which is not described in detail herein.

[0077] Please refer to Figure 2 Based on the same inventive concept, the embodiments of the present application also provide an automobile cooling fan control device, which comprises:

[0078] A vehicle state detection module 201 is configured to judge the vehicle power supply mode;

[0079] A first correction module 202 is configured to, after it is determined that the vehicle is in the high voltage or charging state, correct the engine water temperature based on the current driving environment and vehicle state parameters to obtain a first duty cycle of the cooling fan;

[0080] The second correction module 203 is configured to correct the temperature of the air conditioner based on the current vehicle speed and the operation condition of the air conditioner, and obtain a second duty cycle of the cooling fan;

[0081] The third correction module 204 is configured to correct the temperature of the remaining components based on the current vehicle speed and the preset temperature condition of the components, and obtain a third duty cycle of the cooling fan.

[0082] The target duty cycle calculation module 205 is configured to obtain a target duty cycle request value by taking the maximum value among the first duty cycle, the second duty cycle and the third duty cycle.

[0083] The cooling fan control module 206 is configured to control the operation of the cooling fan based on the target duty cycle request value.

[0084] Based on the same inventive concept, the embodiments of the present application further provide an electronic device, which comprises at least one processor, and the processor is configured to execute a computer program stored in a memory to implement the flowchart steps of the automobile cooling fan control method provided by the embodiments of the present application.

[0085] Optionally, the processor can be a central processing unit or a specific ASIC, and can be one or more integrated circuits for controlling program execution.

[0086] Optionally, the electronic device can further comprise a memory connected to the at least one processor, and the memory can comprise a ROM, a RAM and a disk memory. The memory is configured to store data required by the processor during execution, i.e. the memory stores instructions executable by the at least one processor. The at least one processor executes the instructions stored in the memory to execute the method mentioned in each of the above embodiments. The number of memories is one or more.

[0087] The embodiments of the present application further provide a computer storage medium, wherein the computer storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer executes the method mentioned in each of the above embodiments.

[0088] Based on the same inventive concept, the embodiments of the present application further provide a vehicle, which comprises at least the above electronic device and / or computer readable storage medium. The selection of the vehicle can be determined based on the correct understanding and reasonable implementation of the above-mentioned solutions by those skilled in the art.

[0089] The above description is only the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control method of an automobile radiator fan, characterized by, The method comprises: judging the whole vehicle power supply mode; after determining that the whole vehicle is in the high-voltage or charging state, correcting the engine water temperature based on the current driving environment and vehicle state parameters to obtain a first duty cycle of the cooling fan, including: determining a first initial duty cycle based on the current engine speed and engine load; obtaining a first correction coefficient pre-calibrated according to the engine water temperature, the actual torque of the engine and the calculated target torque; obtaining a second correction coefficient pre-calibrated according to the current vehicle speed; and obtaining a plurality of third correction coefficients pre-calibrated according to the multi-dimensional information of the current driving scene; fusing the first initial duty cycle with the first correction coefficient, the second correction coefficient and the third correction coefficient to obtain the first duty cycle; correcting the air conditioner temperature based on the current vehicle speed and the air conditioner operation to obtain a second duty cycle of the cooling fan; correcting the temperature based on the current vehicle speed and the temperature of the preset components to obtain a third duty cycle of the cooling fan, including: at least according to the water temperature of the motor waterway and the duty cycle request value of the motor water pump, obtaining a second initial duty cycle by querying the pre-calibrated reference table; fusing the second initial duty cycle with the second correction coefficient to obtain the third duty cycle; taking the maximum value of the first duty cycle, the second duty cycle and the third duty cycle to obtain a target duty cycle request value; controlling the cooling fan to operate based on the target duty cycle request value.

2. The automobile radiator fan control method according to claim 1, characterized by, The method for determining the first initial duty cycle comprises: pre-calibrating the temperature corresponding to each engine load at different engine speed values, balancing the duty cycle value within a certain temperature range, and constructing a reference table; querying the reference table with the current engine speed and engine load to determine the first initial duty cycle under the current engine operating condition.

3. The automobile radiator fan control method according to claim 1, characterized by, The control method further comprises: detecting whether the engine or the motor or the motor controller exceeds a preset temperature threshold; if so, controlling the cooling fan to operate according to a preset maximum duty cycle limit.

4. The automobile radiator fan control method according to any one of claims 1 to 3, characterized by, The control method further comprises: after determining that the whole vehicle is in the power-off process, deciding the operating state of the cooling fan according to the power-off duration and the temperature of the engine and / or the preset components.

5. An automobile radiator fan control device applied to the automobile radiator fan control method according to claim 1, characterized by The device comprises: a vehicle state detection module for judging the whole vehicle power supply mode; a first correction module for correcting the engine water temperature based on the current driving environment and vehicle state parameters to obtain a first duty cycle of the cooling fan after determining that the whole vehicle is in the high-voltage or charging state; a second correction module for correcting the air conditioner temperature based on the current vehicle speed and the air conditioner operation to obtain a second duty cycle of the cooling fan; a third correction module for correcting the temperature of the remaining components based on the current vehicle speed and the temperature of the preset components to obtain a third duty cycle of the cooling fan; a target duty cycle calculation module for taking the maximum value of the first duty cycle, the second duty cycle and the third duty cycle to obtain a target duty cycle request value; a cooling fan control module for controlling the cooling fan to operate based on the target duty cycle request value.

6. An electronic device, comprising: including: One or more processors, memories, and one or more computer programs, wherein the one or more computer programs are stored in the memories, the one or more computer programs comprising instructions, when executed by the electronic device, causing the electronic device to perform the vehicle cooling fan control method of any one of claims 1-4.

7. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program, when executed by the processor, implements the vehicle cooling fan control method of any one of claims 1-4.

8. A vehicle characterized by comprising: The vehicle is configured with the electronic device of claim 6 or the computer readable storage medium of claim 7.

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