CN114645767B - Fan control method and device and vehicle - Google Patents
Fan control method and device and vehicle Download PDFInfo
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- CN114645767B CN114645767B CN202110574492.5A CN202110574492A CN114645767B CN 114645767 B CN114645767 B CN 114645767B CN 202110574492 A CN202110574492 A CN 202110574492A CN 114645767 B CN114645767 B CN 114645767B
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- vehicle
- rotating speed
- value
- cooling fan
- speed value
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
- F01P7/048—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using electrical drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2050/00—Applications
- F01P2050/22—Motor-cars
Abstract
The invention provides a fan control method, a device and a vehicle, wherein the method comprises the following steps: under the conditions that the vehicle is determined to be in a wading state and the working mode of a cooling fan of a part to be cooled in the vehicle is a default working mode, working parameters of the cooling fan are obtained; under the condition that the working parameters do not accord with the preset safety conditions, controlling the cooling fan to exit the default working mode; controlling the cooling fan to stop running under the condition that the running state of the vehicle is determined to be the running state according to the vehicle speed of the vehicle; and under the condition that the running state of the vehicle is determined to be a static state according to the vehicle speed, controlling the cooling fan to work in a wading working mode according to the engine rotating speed value and the engine idling rotating speed value of the vehicle. The invention can prevent the cooling fan from being damaged when the vehicle is in the wading state, and can prevent the fan blades from being deformed when the fan blades collide with water in the wading state, thereby avoiding the damage to the fan.
Description
Technical Field
The application belongs to the technical field of automobiles, and particularly relates to a fan control method and device and a vehicle.
Background
At present, a vehicle radiates heat of each heat-generating component through a vehicle front-end module consisting of a radiator and a fan, and the fan is controlled by adopting a corresponding control strategy.
In the prior art, considering that the air intake of the front grille of the vehicle increases with the increase of the vehicle speed, the rotating speed of the fan can be reduced to save energy consumption, and therefore the rotating speed of the fan is gradually reduced with the increase of the vehicle speed to control the fan.
However, in the conventional proposal, when the vehicle runs in wading, the speed of the vehicle is slow, and when the fan runs at a high speed, the blades rotating at a high speed are easy to deform due to impact with water, thereby causing damage to the fan.
Disclosure of Invention
The embodiment of the invention provides a fan control method, a fan control device and a vehicle, and aims to solve the problems that in the prior art, when the vehicle runs in wading, the speed is low, and under the condition that a fan runs at a high speed, the blades rotating at a high speed are easy to deform due to impact with water, so that the fan is damaged.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a fan control method applied to a vehicle controller, where the method includes:
under the condition that a vehicle is determined to be in a wading state and the working mode of a cooling fan of a part to be cooled in the vehicle is a default working mode, working parameters of the cooling fan are obtained;
under the condition that the working parameters do not accord with preset safety conditions, controlling the cooling fan to exit the default working mode;
controlling the cooling fan to stop running under the condition that the running state of the vehicle is determined to be a running state according to the vehicle speed of the vehicle;
and under the condition that the running state of the vehicle is determined to be a static state according to the vehicle speed, controlling the cooling fan to work at a preset rotating speed value according to the engine rotating speed value and the idle engine rotating speed value of the vehicle so as to drive water to flow through a radiator corresponding to the cooling fan to dissipate heat.
In a second aspect, an embodiment of the present invention provides a fan control apparatus, which is applied to a vehicle controller, and is characterized in that the apparatus includes:
the device comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring working parameters of a cooling fan of a part to be cooled in a vehicle under the condition that the vehicle is determined to be in a wading state and the working mode of the cooling fan is a default working mode;
the first control module is used for controlling the cooling fan to exit the default working mode under the condition that the working parameters do not accord with preset safety conditions;
the second control module is used for controlling the cooling fan to stop running under the condition that the running state of the vehicle is determined to be the running state according to the speed of the vehicle;
and the third control module is used for controlling the cooling fan to work in a wading working mode according to the engine rotating speed value and the engine idling rotating speed value of the vehicle under the condition that the running state of the vehicle is determined to be a static state according to the vehicle speed.
In a third aspect, an embodiment of the present invention further provides a vehicle, where the vehicle includes the fan control apparatus provided in the present invention, and is capable of executing the fan control method provided in the present invention.
Compared with the prior art, the fan control method, the fan control device and the vehicle have the following advantages:
in the embodiment of the invention, the vehicle controller can acquire the working parameters of the cooling fan under the condition that the vehicle is determined to be in a wading state and the working mode of the cooling fan of the part to be cooled in the vehicle is a default working mode; under the condition that the working parameters do not accord with preset safety conditions, controlling the cooling fan to exit a default working mode; controlling the cooling fan to stop running under the condition that the running state of the vehicle is determined to be the running state according to the vehicle speed of the vehicle; and under the condition that the running state of the vehicle is determined to be a static state according to the vehicle speed, controlling the cooling fan to work in a wading working mode according to the engine rotating speed value and the engine idling rotating speed value of the vehicle. The invention can control the cooling fan to exit the default working mode according to the working parameters under the condition that the vehicle is determined to be in the wading state, prevent the cooling fan from being damaged when working in the default working mode, control the cooling fan not to work when the vehicle runs, and control the cooling fan to work in the wading working mode when the vehicle is static, thereby avoiding the deformation of the fan blades caused by the collision with water during the wading work and further avoiding the damage to the fan.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart illustrating steps of a method for controlling a fan according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating steps of another method for controlling a fan according to an embodiment of the present invention;
fig. 3 is a block diagram of a fan control device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are only some of the embodiments of the present invention, and not all of the embodiments of the present invention, and it should be understood that the present invention is not limited by the exemplary embodiments described herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention described herein without inventive step, shall fall within the scope of protection of the invention.
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
It is to be understood that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.
In order to provide a thorough understanding of the present invention, a detailed structure will be set forth in the following description in order to explain the present invention. Alternative embodiments of the invention are described in detail below, however, the invention may be practiced in other embodiments that depart from these specific details.
A method, an apparatus and a vehicle for controlling a fan according to the present application will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.
Referring to fig. 1, a flowchart illustrating steps of a method for controlling a fan according to an embodiment of the present invention is shown, where as shown in fig. 1, the method includes:
In the embodiment of the invention, firstly, the running environment of the vehicle is judged, whether the vehicle runs in the land environment or in water is determined, and when the vehicle runs on the land, the heat radiating fan used for radiating the heat of the part to be radiated in the front end module of the vehicle works in the original default working mode to radiate the heat of the part to be radiated.
When the vehicle just enters water from the land and runs in the water, the cooling fan in the vehicle keeps the original default working mode on the land to work, but is in a wading state, and in this case, the working parameters of the cooling fan, such as the rotating speed, power, voltage, current and the like of the cooling fan, are obtained. The default working mode is a land working mode of the cooling fan.
For example, after it is determined that the vehicle has just entered water from land, it may be determined that the vehicle is traveling in water by using the vehicle-mounted camera, the temperature sensor, the humidity detection, and the like, so as to determine that the vehicle is in a wading state, and at the same time, detect the operating mode of the cooling fan, determine that the cooling fan is operating in the default operating mode, and obtain the operating parameters of the cooling fan.
And 102, controlling the cooling fan to exit the default working mode under the condition that the working parameters do not accord with preset safety conditions.
And further, the obtained working parameters of the cooling fan are judged, whether the working parameters of the cooling fan meet preset safety conditions or not is determined, and the cooling fan is controlled to exit the default working mode under the condition that the working parameters of the cooling fan do not meet the preset safety conditions, so that the cooling fan is prevented from being damaged by continuously working in the default working mode. The preset safety condition is that when the cooling fan works in a wading state according to current working parameters, the fan blades of the cooling fan cannot deform and damage.
For example, if the rotational speed of the cooling fan is low or the power of the cooling fan is low, and the cooling fan does not rotate at a high speed, even if the fan blades of the cooling fan collide with water, the fan blades will not deform, and thus the cooling fan can continue to operate in the default operating mode.
And 103, controlling the cooling fan to stop running under the condition that the running state of the vehicle is determined to be a running state according to the vehicle speed of the vehicle.
After the radiator fan exits the default operating mode, the vehicle may be in a stationary state or may be in a stationary state in consideration of traveling in water. When the vehicle runs in water and is in a running state, water flows relative to the vehicle, heat generated by the work of the heat dissipation part can be taken away, and the heat dissipation part is cooled.
Therefore, the speed of the vehicle can be acquired, whether the vehicle is in a running state or a static state is determined according to the vehicle speed, and the cooling fan can be directly controlled not to work and stop running under the condition that the running state of the vehicle is the running state, so that the cooling fan is protected and energy consumption can be saved.
For example, the speed of the vehicle may be obtained according to a speed sensor, a vehicle wheel rotation speed, and the like, and in the case that the vehicle speed is greater than zero kilometer per hour, it may be determined that the vehicle is in a traveling state, and at this time, the direct control cooling fan does not operate.
It is to be understood that the above examples are intended only for the convenience of further understanding of the present invention and are not to be construed as limiting the present invention.
And 104, controlling the cooling fan to work in a wading working mode according to the engine rotating speed value and the engine idle rotating speed value of the vehicle under the condition that the running state of the vehicle is determined to be the static state according to the vehicle speed.
Further, in consideration of the fact that when the vehicle is in a stationary state while slipping or stopping, corresponding parts of the vehicle, such as an engine, etc., still operate to generate heat, it is still necessary to dissipate heat from the heat dissipating parts.
Therefore, when the driving state of the vehicle is determined to be the stationary state according to the vehicle speed, the engine speed value and the engine idle speed value of the vehicle engine can be obtained, and the cooling fan is controlled to operate in the wading operation mode according to the engine speed value and the engine idle speed value.
The idling engine speed value is the speed value of the vehicle in a neutral state, the engine is not loaded and is in an idling state, and the fan blades of the cooling fan cannot be damaged in a wading working mode.
For example, the speed of the vehicle may be obtained from a speed sensor, a wheel speed of the vehicle, and the like, and when the vehicle speed is equal to zero, it may be determined that the vehicle is in a stationary state, an engine speed value and an engine idle speed value of the vehicle may be obtained, and the cooling fan may be controlled to operate in the wading operation mode according to the engine speed value and the engine idle speed value.
In summary, the fan control method provided in the embodiment of the present invention includes: under the conditions that the vehicle is determined to be in a wading state and the working mode of a cooling fan of a part to be cooled in the vehicle is a default working mode, working parameters of the cooling fan are obtained; under the condition that the working parameters do not accord with preset safety conditions, controlling the cooling fan to exit a default working mode; under the condition that the running state of the vehicle is determined to be a running state according to the speed of the vehicle, controlling the cooling fan to stop running; and under the condition that the running state of the vehicle is determined to be a static state according to the vehicle speed, controlling the cooling fan to work in a wading working mode according to the engine rotating speed value and the engine idling rotating speed value of the vehicle. The invention can control the cooling fan to exit the default working mode according to the working parameters under the condition that the vehicle is determined to be in the wading state, prevent the cooling fan from being damaged when working in the default working mode, control the cooling fan not to work when the vehicle runs, and control the cooling fan to work in the wading working mode when the vehicle is static, thereby avoiding the deformation of the fan blades caused by the collision with water during the wading work and further avoiding the damage to the fan.
Referring to fig. 2, a flowchart illustrating steps of another fan control method according to an embodiment of the present invention is shown. As shown in fig. 2, the method includes:
For this step, reference may be made to step 101, which is not described herein again.
Optionally, in an implementation manner of the embodiment of the present invention, step 201 may further include:
and a substep 2011 of obtaining a requested rotation speed value and an actual rotation speed value of the cooling fan.
In this step, when the radiator fan of the vehicle is in operation, the controller may send a requested rotation speed value to the radiator fan according to the vehicle speed, the engine water temperature, the motor temperature, and the like, so that the radiator fan rotates at the requested rotation speed value. When the vehicle runs on the land, the radiator fan only suffers from air resistance, and can be ignored, so that the difference between the requested rotating speed value and the actual rotating speed value of the radiator fan is small.
However, when the vehicle wades, the rotation of the radiator fan is affected by the resistance of water, and the larger the rotation speed is, the larger the resistance is, so that the requested rotation speed value and the actual rotation speed value of the radiator fan can be obtained in real time, and whether the vehicle wades or not is judged according to the requested rotation speed value and the actual rotation speed value of the radiator fan.
And a substep 2012, determining that the vehicle is in the wading state when the rotation speed difference between the requested rotation speed value and the actual rotation speed value is greater than a preset threshold value.
Specifically, when the vehicle wades, the rotation of the radiator fan is greatly affected by the resistance of water. And judging whether the vehicle is in a wading state or not according to a rotating speed difference value between the request rotating speed value and the actual rotating speed value, and determining that the vehicle is in the wading state under the condition that the rotating speed difference value between the request rotating speed value and the actual rotating speed value is larger than a preset threshold value. The preset threshold is obtained by staff according to experience or experimental calibration.
For example, the preset threshold may be set to 50 revolutions per minute, and in the case where the rotational speed difference between the requested rotational speed value and the actual rotational speed value is greater than 50 revolutions per minute, it is proved that the radiator fan is subjected to resistance from water, and it is considered that the vehicle will wade.
It is to be understood that the above examples are intended only for the convenience of further understanding of the present invention and are not to be construed as limiting the present invention.
Optionally, after substep 2012, it may further include:
and a substep 2013, keeping the cooling fan in the default working mode when the rotation speed difference is smaller than or equal to the preset threshold value.
Specifically, when the rotating speed difference value between the requested rotating speed value and the actual rotating speed value is smaller than or equal to the preset threshold value, it is proved that the cooling fan does not receive water resistance during operation, the vehicle does not wade, and the cooling fan is controlled to work in a default working mode.
Wherein the operating parameters include: the operating current value of the heat radiation fan, the requested rotating speed value and the actual rotating speed value
Specifically, when the vehicle wades, if the cooling fan does not rotate at a high speed, the blades of the cooling fan will not deform due to the small rotation speed even if the blades of the cooling fan collide with water, so that the cooling fan is safe. When the vehicle runs in wading and the radiator fan rotates at high speed, the radiator fan is unsafe.
Therefore, when the vehicle is determined to be in the wading state, whether the radiator fan rotates at a high speed needs to be further determined according to the operating current value of the radiator fan. And when the rotating speed difference value between the request rotating speed value and the actual rotating speed value is greater than the preset threshold value and the working current value is greater than or equal to the preset current value, determining that the working parameters do not accord with the preset safety condition and the cooling fan is unsafe, and controlling the cooling fan to exit the default working mode, so that the cooling fan is prevented from being damaged by continuously working in the default working mode.
For example, the preset current value may be set to 35A, and when the rotation speed difference between the requested rotation speed value and the actual rotation speed value is greater than 50 revolutions per minute and the working current value is greater than or equal to 35A, the working parameter is considered not to meet the preset safety condition, and the cooling fan is operated in an unsafe state.
The preset current value is the current for the worker to obtain the normal work of each fan under different fan rotating speeds in the whole vehicle state through a calibration means according to specific working conditions.
For example, the preset current value is different under two working conditions of the vehicle front grille blocking wall and the non-blocking wall, and preferably, the preset current value calibrated under the working condition of the vehicle front grille blocking wall can be selected.
It is to be understood that the above examples are included merely for convenience in further understanding of the present invention and are not to be construed as limiting the invention.
In the embodiment of the invention, the operation safety state of the cooling fan is determined by the rotating speed and the working current value of the cooling fan, and the cooling fan is controlled to exit the default working mode under the condition that the preset safety condition is not met, so that the cooling fan is prevented from being damaged by continuously working in the default working mode, meanwhile, the long-time heavy-current working of the fan is avoided, and the influence on the service life of a fan motor is reduced.
And 203, keeping the cooling fan in the default working mode unchanged under the condition that the rotating speed difference value is greater than the preset threshold value and the working current value is less than the preset current value.
Further, under the condition that the rotating speed difference value between the request rotating speed value and the actual rotating speed value is larger than the preset threshold value and the working current value is smaller than the preset current value, the vehicle can be determined to be in the wading state, but the cooling fan does not rotate at a high speed, even if the fan blades of the cooling fan collide with water, the fan blades cannot deform due to the fact that the rotating speed is small, and the cooling fan is safe, so that the working mode of the cooling fan can be controlled to be unchanged, and the cooling fan works in the default working mode.
And 204, controlling the cooling fan to stop running under the condition that the running state of the vehicle is determined to be the running state according to the vehicle speed of the vehicle.
For this step, reference may be made to step 103, which is not described herein again.
Optionally, in an implementation manner of the embodiment of the present invention, step 204 may further include:
substep 2041, in the case where the vehicle comprises non-driven wheels, obtaining wheel speeds of two non-driven wheels of the vehicle.
In particular, when the vehicle is in a two-drive configuration, the vehicle has non-driven wheels and driven wheels. Considering the situation where the drive wheels slip, the vehicle must be moving if the non-drive wheels are turning. Therefore, the wheel rotation speeds of the two non-driving wheels can be acquired by the speed sensor, and whether the running state of the vehicle is the traveling state or not can be judged according to the wheel rotation speeds of the two non-driving wheels.
And a substep 2042 of determining that the vehicle is in a running state and controlling the cooling fan to stop running when the wheel speeds of the two non-driven wheels are both greater than 0 rpm.
Further, after the wheel rotating speeds of the two non-driving wheels are obtained, if the wheel rotating speeds of the two non-driving wheels are larger than 0 rpm, the vehicle is in a traveling state, the cooling fan is controlled to stop running, and the cooling component is cooled through water flow moving relative to the vehicle, so that energy consumption is saved.
Substep 2043, in the case that the vehicle does not comprise non-driven wheels, obtaining wheel speeds of four driven wheels of the vehicle.
Specifically, when the vehicle is in a four-wheel drive configuration, all four wheels of the vehicle are drive wheels. In the event of a wheel slip, the wheel may lock. Therefore, the wheel rotation speeds of the four driving wheels can be acquired by the speed sensor, and whether the running state of the vehicle is the traveling state or not can be determined from the wheel rotation speeds of the four driving wheels.
Sub-step 2044, in case none of the wheel speeds of the four driving wheels is equal to 0 revolutions per minute, determining that the vehicle is in a travelling state
Further, after the wheel speeds of the four driving wheels are obtained, one of the four driving wheels rotates, and the vehicle is driven to move. Therefore, whether the wheel rotating speeds of the four driving wheels are not equal to 0 rpm is judged, if the wheel rotating speed of any one wheel in the four driving wheels is not equal to 0 rpm, the vehicle is in a running state, the cooling fan is controlled to stop running, and the cooling part is cooled through water flow moving relative to the vehicle, so that energy consumption is saved.
And step 205, controlling the cooling fan to work in a wading working mode according to the engine rotating speed value and the engine idle rotating speed value of the vehicle under the condition that the running state of the vehicle is determined to be the static state according to the vehicle speed.
For this step, reference may be made to step 104, which is not described herein again.
Optionally, in an implementation manner of the embodiment of the present invention, step 205 may further include:
and a substep 2051 of acquiring an engine speed value and an engine idle speed value of the vehicle when the running state of the vehicle is determined to be a stationary state according to the vehicle speed.
Optionally, sub-step 2051 may further include:
substep A1, in the case where the vehicle comprises non-driven wheels, obtaining wheel speeds of two non-driven wheels of the vehicle.
For this step, reference may be made to the sub-step 2041, which is not described herein again.
And a substep A2, under the condition that the wheel rotating speeds of the two non-driving wheels are equal to 0 revolution per minute, determining that the vehicle is in a static state, and acquiring an engine rotating speed value and an engine idling rotating speed value of the vehicle.
Specifically, if the wheel speeds of the two non-driving wheels are equal to 0 rpm, it is indicated that the vehicle is in a stationary state and does not travel, and the vehicle may slip or may completely stop at this time, so that the engine speed value and the engine idle speed value of the vehicle are obtained, and whether the cooling fan needs to operate is determined according to the engine speed value and the engine idle speed value.
And a substep A3 of obtaining wheel speeds of four driving wheels of the vehicle when the vehicle does not include a non-driving wheel.
This step can refer to sub-step 2043, which is not described herein again.
Sub-step A4, determining that the vehicle is stationary in case the wheel speeds of the four driving wheels are all equal to 0 revolutions per minute.
Specifically, if the vehicle is in a four-wheel drive configuration, one rotation of each of the four drive wheels drives the vehicle to travel. Therefore, it is determined whether the wheel speeds of the four drive wheels are all equal to 0 rpm, and in the case where none of the four drive wheels is rotating or all of the four drive wheels are locked, it is indicated that the vehicle is in a stationary state. Under the condition that four wheels have no rotating speed, although the vehicle is not moved, the engine may be in an extremely bad working condition of a clutch slip film with output power, so that an engine rotating speed value and an engine idling rotating speed value of the vehicle are obtained, and whether the cooling fan needs to work or not is judged according to the engine rotating speed value and the engine idling rotating speed value.
And a substep 2052 of controlling the radiator fan to work in a wading work mode according to the engine rotating speed value and the engine idle rotating speed value of the vehicle.
Optionally, sub-step 2052 may further include:
and a substep B1 of controlling the cooling fan to stop running under the condition that the rotating speed value of the engine is less than or equal to the idling rotating speed value of the engine.
And further, judging whether the engine rotating speed value is less than or equal to the engine idling rotating speed value or not according to the acquired engine rotating speed value and the engine idling rotating speed value.
Specifically, in the case where the engine speed value is equal to the engine idle speed value, the vehicle is in a neutral state, and the engine is not loaded. Or the engine speed is 0 and no start is made. At the moment, it can be determined that the driving wheels of the vehicle do not slip in place, and the engine does not output power, so that heat dissipation is not needed, and the cooling fan is controlled to stop running to save energy consumption.
The substep B1, controlling the cooling fan to work at a preset rotating speed value under the condition that the rotating speed value of the engine is greater than the idling rotating speed value of the engine so as to drive water to flow through a radiator corresponding to the cooling fan for cooling; the preset rotating speed value is smaller than the rotating speed value of the fan in the default working mode.
In this step, when the traveling state of the vehicle is determined to be the stationary state based on the vehicle speed, the engine may have a power output and the heat dissipation member needs to be dissipated regardless of whether the vehicle is a two-drive vehicle or a four-drive vehicle.
Specifically, whether the engine speed value is greater than the engine idle speed value or not is judged according to the acquired engine speed value and the engine idle speed value, and when the engine speed value is not greater than the engine idle speed value, because the vehicle is in a static state, but the engine has power output, it is indicated that the driving wheels of the vehicle slip in place, and a cooling fan needs to operate to cool the engine.
Correspondingly, the cooling fan is controlled to work at a preset rotating speed value, the cooling fan is used as a propeller to drive water to flow, and the heat of the radiator corresponding to the cooling fan is dissipated. The preset rotating speed value is obtained through working condition calibration, the preset rotating speed value is smaller than the rotating speed value of the fan in the default working mode, and when the cooling fan rotates at the preset rotating speed value, the fan blades cannot deform due to impact with water. For example, the preset rotation speed may be 500 rpm, which is not limited by the present invention.
Further, it is contemplated that the cold engine may be operated at a higher idle speed after starting to quickly warm up the engine, which may be operated at a lower fixed idle speed. Therefore, the engine heat engine idle speed value may be selected as the engine idle speed value.
In the embodiment of the invention, the wading working mode of the cooling fan comprises two conditions of working at a preset rotating speed value and stopping running of the cooling fan, and the cooling fan can be controlled to work in different conditions under the wading working mode according to the rotating speed value of the engine and the idling rotating speed value of the engine, so that the deformation of fan blades caused by collision with water during wading working is avoided, and further the damage to the fan is avoided.
And step 206, acquiring a current actual power value of the cooling fan and a rated power value of the cooling fan at the preset rotating speed value.
After the cooling fan is controlled to work at the preset rotating speed value, the current actual power value of the cooling fan and the rated power value of the cooling fan under the preset rotating speed value are obtained. The actual power value is the current operating power value of the cooling fan, and the rated power value is the power value of the cooling fan in a normal working state at a preset rotating speed.
When the cooling fan operates at the preset rotation speed value in the wading state, the cooling fan needs to operate at a power higher than the power at which the cooling fan operates at the preset rotation speed value in the normal operating state, so that the cooling fan can operate at the preset rotation speed value in water.
For example, the current actual power value of the cooling fan may be calculated by the current value and the voltage value of the cooling fan, and the rated power value of the cooling fan at the preset rotation speed value may be obtained by looking up a table, which is not limited in the present invention.
And step 207, controlling the fan to exit the wading working mode and enter the default working mode under the condition that the power difference value between the actual power value and the rated power value is within a preset range.
Further, after the current actual power value of the cooling fan and the rated power value of the cooling fan at the preset rotating speed value are obtained, whether the vehicle is separated from the wading state or not is judged according to the difference value of the actual power value and the rated power value, and wading is not performed any more.
Specifically, under the condition that the power difference value between the actual power value and the rated power value is within the preset range, it can be proved that the vehicle does not wade any more, and at this time, the cooling fan is controlled to exit the wading working mode and enter the default working mode to work. And if the power difference value between the actual power value and the rated power value is not in the preset range, indicating that the vehicle is still in a wading state, and controlling the cooling fan to continuously work at the preset rotating speed value.
The preset range is obtained through experimental calibration according to actual working conditions, for example, the preset range can be calibrated to be minus 10 watts to 10 watts, which is not limited in the present invention.
In summary, another fan control method provided in the embodiment of the present invention includes: the embodiment of the invention provides a fan control method, which comprises the following steps: under the condition that the vehicle is determined to be in a wading state and the working mode of a cooling fan of a part to be cooled in the vehicle is a default working mode, working parameters of the cooling fan are obtained; under the condition that the working parameters do not accord with preset safety conditions, controlling the cooling fan to exit a default working mode; under the condition that the running state of the vehicle is determined to be a running state according to the speed of the vehicle, controlling the cooling fan to stop running; and under the condition that the running state of the vehicle is determined to be a static state according to the vehicle speed, controlling the cooling fan to work in a wading working mode according to the engine rotating speed value and the engine idling rotating speed value of the vehicle. The invention can control the cooling fan to exit the default working mode according to the working parameters under the condition that the vehicle is determined to be in the wading state, thereby preventing the cooling fan from being damaged when working in the default working mode, avoiding the long-time heavy-current work of the fan and reducing the influence on the service life of the fan motor. Meanwhile, the heat dissipation fan is controlled not to work when the vehicle runs, and the heat dissipation fan is controlled to work in a wading working mode when the vehicle is static, so that the fan blades can be prevented from being deformed due to impact with water during wading work, and further the damage to the fan is avoided.
Referring to fig. 3, a block diagram of a structure of a fan control device according to an embodiment of the present invention is shown, which may specifically include the following modules:
the first obtaining module 301 is configured to obtain working parameters of a cooling fan of a component to be cooled when a vehicle is determined to be in a wading state and a working mode of the cooling fan in the vehicle is a default working mode;
optionally, the first obtaining module 301 includes:
the obtaining submodule is used for obtaining a requested rotating speed value and an actual rotating speed value of the cooling fan;
and the first determining submodule is used for determining that the vehicle is in a wading state under the condition that the rotating speed difference value between the requested rotating speed value and the actual rotating speed value is larger than a preset threshold value.
Wherein the operating parameters include:
the working current value of the cooling fan, the requested rotating speed value and the actual rotating speed value;
the first obtaining module 301 further includes:
and the second determining submodule is used for determining that the working parameter does not accord with a preset safety condition and controlling the cooling fan to exit the default working mode under the condition that the rotating speed difference value between the requested rotating speed value and the actual rotating speed value is greater than the preset threshold value and the working current value is greater than or equal to the preset current value.
A first control module 302, configured to control the cooling fan to exit the default operating mode when the operating parameter does not meet a preset safety condition;
a second control module 303, configured to control the cooling fan to stop operating when it is determined that the driving state of the vehicle is a traveling state according to a vehicle speed of the vehicle;
and a third control module 304, configured to, when it is determined that the driving state of the vehicle is a stationary state according to the vehicle speed, control the radiator fan to operate in a wading operation mode according to an engine speed value and an engine idle speed value of the vehicle.
Optionally, the third control module 304 includes:
the first control submodule is used for controlling the cooling fan to stop running under the condition that the rotating speed value of the engine is less than or equal to the idling rotating speed value of the engine;
the second control submodule is used for controlling the cooling fan to work at a preset rotating speed value under the condition that the rotating speed value of the engine is greater than the idling rotating speed value of the engine so as to drive water to flow through a radiator corresponding to the cooling fan for heat dissipation; the preset rotating speed value is smaller than the rotating speed value of the fan in the default working mode.
Optionally, the apparatus further comprises:
and the fourth control module is used for keeping the cooling fan in the default working mode unchanged under the condition that the rotating speed difference value is smaller than or equal to the preset threshold value, or the rotating speed difference value is larger than the preset threshold value and the working current value is smaller than the preset current value.
The second obtaining module is used for obtaining the current actual power value of the cooling fan and the rated power value of the cooling fan under the preset rotating speed value;
and the fifth control module is used for controlling the fan to exit the wading working mode and enter the default working mode under the condition that the power difference value between the actual power value and the rated power value is within a preset range.
To sum up, an embodiment of the present invention provides a fan control apparatus, including: the first acquisition module is used for acquiring working parameters of the cooling fan under the conditions that the vehicle is determined to be in a wading state and the working mode of the cooling fan for the part to be cooled in the vehicle is a default working mode; the first control module is used for controlling the cooling fan to exit the default working mode under the condition that the working parameters do not accord with the preset safety conditions; the second control module is used for controlling the cooling fan to stop running under the condition that the running state of the vehicle is determined to be the running state according to the speed of the vehicle; and the third control module is used for controlling the cooling fan to work in a wading working mode according to the engine rotating speed value and the engine idling rotating speed value of the vehicle under the condition that the running state of the vehicle is determined to be the static state according to the vehicle speed. The invention can control the cooling fan to exit the default working mode according to the working parameters under the condition that the vehicle is determined to be in the wading state, prevent the cooling fan from being damaged due to the working in the default working mode, control the cooling fan not to work when the vehicle runs, and control the cooling fan to work in the wading working mode when the vehicle is static, thereby avoiding the deformation of the fan blades due to the collision with water during the wading working and further avoiding the damage to the fan.
The embodiment of the invention also provides a vehicle which comprises the fan control device provided by the invention and can execute the fan control method provided by the invention.
It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (13)
1. A fan control method is applied to a vehicle controller, and is characterized by comprising the following steps:
under the condition that a vehicle is determined to be in a wading state and the working mode of a cooling fan of a part to be cooled in the vehicle is a default working mode, working parameters of the cooling fan are obtained;
under the condition that the working parameters do not accord with preset safety conditions, controlling the cooling fan to exit the default working mode;
controlling the cooling fan to stop running under the condition that the running state of the vehicle is determined to be a running state according to the vehicle speed of the vehicle;
and under the condition that the running state of the vehicle is determined to be a static state according to the vehicle speed, controlling the cooling fan to work in a wading working mode according to the engine rotating speed value and the engine idling rotating speed value of the vehicle.
2. The fan control method of claim 1, wherein the determining that the vehicle is in the wading state comprises:
acquiring a request rotating speed value and an actual rotating speed value of the cooling fan;
and under the condition that the rotating speed difference value between the request rotating speed value and the actual rotating speed value is larger than a preset threshold value, determining that the vehicle is in a wading state.
3. The fan control method of claim 2, wherein the operating parameters comprise:
the working current value, the requested rotating speed value and the actual rotating speed value of the cooling fan;
under the condition that the working parameters do not accord with preset safety conditions, the method for controlling the cooling fan to exit the default working mode comprises the following steps:
and under the condition that the rotating speed difference value between the request rotating speed value and the actual rotating speed value is greater than the preset threshold value and the working current value is greater than or equal to the preset current value, determining that the working parameters do not accord with preset safety conditions, and controlling the cooling fan to exit the default working mode.
4. The fan control method according to claim 3, further comprising:
and when the rotating speed difference value is smaller than or equal to the preset threshold value, or when the rotating speed difference value is larger than the preset threshold value and the working current value is smaller than the preset current value, keeping the heat radiation fan in the default working mode unchanged.
5. The fan control method according to claim 1, wherein the controlling the radiator fan to operate in a wading operation mode according to the engine speed value and the engine idle speed value of the vehicle includes:
controlling the cooling fan to stop running under the condition that the engine rotating speed value is less than or equal to the engine idling rotating speed value;
when the engine rotating speed value is larger than the idling rotating speed value of the engine, controlling the heat radiation fan to work at a preset rotating speed value so as to drive water to flow through a radiator corresponding to the heat radiation fan for heat radiation; the preset rotating speed value is smaller than the rotating speed value of the cooling fan in the default working mode.
6. The fan control method as claimed in claim 5, wherein after controlling the heat dissipating fan to operate at a preset rotation speed value, the method further comprises:
acquiring the current actual power value of the cooling fan and the rated power value of the cooling fan under the preset rotating speed value;
and under the condition that the power difference value between the actual power value and the rated power value is within a preset range, controlling the cooling fan to exit the wading working mode and enter the default working mode.
7. A fan control apparatus for use in a vehicle controller, the apparatus comprising:
the device comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring working parameters of a cooling fan of a part to be cooled in a vehicle under the condition that the vehicle is determined to be in a wading state and the working mode of the cooling fan is a default working mode;
the first control module is used for controlling the cooling fan to exit the default working mode under the condition that the working parameters do not accord with preset safety conditions;
the second control module is used for controlling the cooling fan to stop running under the condition that the running state of the vehicle is determined to be the running state according to the speed of the vehicle;
and the third control module is used for controlling the cooling fan to work in a wading working mode according to the engine rotating speed value and the engine idling rotating speed value of the vehicle under the condition that the running state of the vehicle is determined to be a static state according to the vehicle speed.
8. The fan control apparatus of claim 7, wherein the first obtaining module comprises:
the obtaining submodule is used for obtaining a requested rotating speed value and an actual rotating speed value of the cooling fan;
and the first determining submodule is used for determining that the vehicle is in a wading state under the condition that the rotating speed difference value between the requested rotating speed value and the actual rotating speed value is larger than a preset threshold value.
9. The fan control apparatus of claim 8, wherein the operating parameters comprise:
the working current value of the cooling fan, the requested rotating speed value and the actual rotating speed value;
the first obtaining module further comprises;
and the second determining submodule is used for determining that the working parameter does not accord with a preset safety condition and controlling the cooling fan to exit the default working mode under the condition that the rotating speed difference value between the requested rotating speed value and the actual rotating speed value is greater than the preset threshold value and the working current value is greater than or equal to the preset current value.
10. The fan control apparatus as claimed in claim 9, wherein the apparatus further comprises:
and the fourth control module is used for keeping the cooling fan in the default working mode unchanged under the condition that the rotation speed difference value is smaller than or equal to the preset threshold value or the rotation speed difference value is larger than the preset threshold value and the working current value is smaller than the preset current value.
11. The fan control apparatus of claim 7, wherein the third control module comprises:
the first control submodule is used for controlling the cooling fan to stop running under the condition that the rotating speed value of the engine is less than or equal to the idling rotating speed value of the engine;
the second control submodule is used for controlling the cooling fan to work at a preset rotating speed value under the condition that the rotating speed value of the engine is greater than the idling rotating speed value of the engine so as to drive water to flow through a radiator corresponding to the cooling fan for heat dissipation; the preset rotating speed value is smaller than the rotating speed value of the cooling fan in the default working mode.
12. The fan control apparatus as claimed in claim 11, wherein the apparatus further comprises:
the second obtaining module is used for obtaining the current actual power value of the cooling fan and the rated power value of the cooling fan under the preset rotating speed value;
and the fifth control module is used for controlling the cooling fan to exit the wading working mode and enter the default working mode under the condition that the power difference value between the actual power value and the rated power value is within a preset range.
13. A vehicle, characterized by comprising a fan control apparatus according to any one of claims 7-12.
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