CN111255554B - Engine fan rotation control method and apparatus - Google Patents
Engine fan rotation control method and apparatus Download PDFInfo
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- CN111255554B CN111255554B CN202010100006.1A CN202010100006A CN111255554B CN 111255554 B CN111255554 B CN 111255554B CN 202010100006 A CN202010100006 A CN 202010100006A CN 111255554 B CN111255554 B CN 111255554B
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- engine
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- crankshaft
- speed ratio
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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
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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
- F01P7/026—Thermostatic control
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Abstract
The embodiment of the invention provides a method and equipment for controlling the rotation of an engine fan, wherein the method comprises the following steps: the method comprises the steps of obtaining the current temperature of cooling liquid of an engine, obtaining the current rotating speed of a crankshaft of the engine if the current temperature of the cooling liquid of the engine is larger than or equal to a first temperature threshold value and smaller than or equal to a second temperature threshold value, determining a first target speed ratio of an engine fan according to the current rotating speed of the crankshaft of the engine, and controlling the engine fan to rotate according to the first target speed ratio. The embodiment of the invention can avoid the rotating frequency of the engine crankshaft from being close to the frequency of the engine fan, eliminate beat frequency and improve the comfort of the whole vehicle.
Description
Technical Field
The embodiment of the invention relates to the technical field of engines, in particular to a method and equipment for controlling rotation of an engine fan.
Background
The engine cooling system can timely distribute away the heat absorbed by the heated parts. The engine fan is an important component of an engine cooling system, and the engine is ensured to work under the optimum condition by adjusting the rotating speed of the engine.
At present, the conventional method for controlling the rotation of the engine fan adjusts the rotation speed of the engine fan according to the temperature of the engine coolant, when the temperature of the engine coolant is high, the engine fan is controlled to rotate at a higher rotation speed, and when the temperature of the engine coolant is low, the engine fan is controlled to rotate at a lower rotation speed.
However, the inventor finds that the method for adjusting the rotating speed of the fan of the engine easily causes beat frequency and reduces the comfort of the whole vehicle in the vibration test process of the whole vehicle.
Disclosure of Invention
The embodiment of the invention provides a method and equipment for controlling rotation of an engine fan, and aims to solve the problems that beat frequency occurs when an engine is in an idling working condition, and the comfort of a whole vehicle is reduced.
In a first aspect, an embodiment of the present invention provides a method for controlling rotation of an engine fan, including:
acquiring the current temperature of the cooling liquid of the engine;
if the current temperature of the cooling liquid of the engine is greater than or equal to a first temperature threshold value and less than or equal to a second temperature threshold value, acquiring the current rotating speed of the crankshaft of the engine;
and determining a first target speed ratio of the engine fan according to the current rotating speed of the crankshaft of the engine, and controlling the engine fan to rotate according to the first target speed ratio.
In one possible implementation, the determining a first target speed ratio of the engine fan according to the current rotation speed of the engine crankshaft includes:
acquiring a preset corresponding relation between the rotating speed of a crankshaft of the engine and the speed ratio of a fan of the engine;
and determining a first target speed ratio of the engine fan according to the preset corresponding relation and the current rotating speed of the engine crankshaft.
In one possible implementation manner, the obtaining a preset corresponding relationship between a rotation speed of a crankshaft of an engine and a speed ratio of an engine fan, and determining a first target speed ratio of the engine fan according to the preset corresponding relationship and a current rotation speed of the crankshaft of the engine includes:
if the current rotating speed of the engine crankshaft is less than or equal to a first rotating speed threshold value, determining that a first target speed ratio of the engine fan is 1;
if the current rotating speed of the engine crankshaft is greater than the first rotating speed threshold and less than a second rotating speed threshold, determining that a first target speed ratio of the engine fan is a first sub-target speed ratio, wherein the first sub-target speed ratio is less than 1;
and if the current rotating speed of the engine crankshaft is greater than or equal to the second rotating speed threshold, determining that the first target speed ratio of the engine fan is a second sub-target speed ratio, wherein the second sub-target speed ratio is smaller than the first sub-target speed ratio.
In one possible implementation manner, the method further includes:
and when the current coolant temperature of the engine is smaller than the first temperature threshold value, controlling the engine fan to rotate according to a second target speed ratio.
In one possible implementation manner, the method further includes:
and when the current coolant temperature of the engine is greater than the second temperature threshold value, controlling the engine fan to rotate according to a third target speed ratio.
In one possible implementation manner, before obtaining the current rotation speed of the crankshaft of the engine, the method further includes:
acquiring a first vibration amplitude of the engine crankshaft and a second vibration amplitude of the engine fan;
if the difference value of the first vibration amplitude and the second vibration amplitude is larger than a preset threshold value, controlling the engine fan to rotate according to a fourth target speed ratio;
the acquiring the current rotating speed of the engine crankshaft comprises the following steps:
and if the difference value of the first vibration amplitude and the second vibration amplitude is smaller than or equal to the preset threshold value, acquiring the current rotating speed of the engine crankshaft.
In one possible implementation, the controlling the engine fan to rotate according to the first target speed ratio includes:
and determining the target rotating speed of the engine fan according to the current rotating speed of the engine crankshaft and the first target speed ratio, and controlling the engine fan to rotate at the target rotating speed.
In a second aspect, an embodiment of the present invention provides an engine fan rotation control apparatus, including:
the first acquisition module is used for acquiring the current coolant temperature of the engine;
the second obtaining module is used for obtaining the current rotating speed of the engine crankshaft if the current temperature of the cooling liquid of the engine is greater than or equal to a first temperature threshold and less than or equal to a second temperature threshold;
the control module is used for determining a first target speed ratio of the engine fan according to the current rotating speed of the engine crankshaft and controlling the engine fan to rotate according to the first target speed ratio.
In a third aspect, an embodiment of the present invention provides an engine fan rotation control apparatus including:
a controller, a temperature sensor and a rotating speed sensor;
the temperature sensor and the rotating speed sensor are respectively connected with the controller;
the temperature sensor is used for collecting the current temperature of the cooling liquid of the engine;
the rotating speed sensor is used for acquiring the current rotating speed of the engine crankshaft;
the controller is configured to execute the engine fan rotation control method according to the first aspect and various possible implementations of the first aspect.
In a fourth aspect, embodiments of the present invention provide a computer-readable storage medium, where computer-executable instructions are stored, and when the computer-executable instructions are executed by a controller, the method for controlling rotation of an engine fan according to the first aspect and various possible designs of the first aspect is implemented.
According to the method and the device for controlling the rotation of the engine fan, provided by the embodiment of the invention, when the temperature of the current cooling liquid of the engine is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, the speed ratio of the engine fan is adjusted according to the current rotating speed of the crankshaft of the engine, so that the rotating frequency of the crankshaft of the engine is prevented from being close to the frequency of the engine fan, the beat frequency is eliminated, and the comfort of the whole vehicle is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a first flowchart illustrating a method for controlling fan rotation of an engine according to an embodiment of the present invention;
FIG. 2 is a second flowchart illustrating a method for controlling fan rotation of an engine according to an embodiment of the present invention;
FIG. 3 is a third schematic flow chart illustrating a method for controlling fan rotation of an engine according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an engine fan rotation control apparatus according to an embodiment of the present invention;
FIG. 5 is a first schematic diagram of a hardware configuration of an engine fan rotation control apparatus according to an embodiment of the present invention;
fig. 6 is a second schematic diagram of a hardware structure of an engine fan rotation control device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the whole vehicle vibration test process of the engine, if the rotation frequency of the crankshaft of the engine is close to the rotation frequency of the fan of the engine and the vibration amplitude of the crankshaft of the engine and the vibration amplitude of the fan of the engine are in the same order of magnitude, the whole vehicle can generate beat frequency, and therefore the whole vehicle comfort is reduced.
The conventional method for controlling the rotation of the engine fan adjusts the rotation speed of the engine fan according to the temperature of the engine coolant, controls the engine fan to rotate at a higher rotation speed when the temperature of the engine coolant is high, and controls the engine fan to rotate at a lower rotation speed when the temperature of the engine coolant is low. For example, the speed ratio of the engine fan is adjusted to 0.85 when the engine coolant temperature is less than 85 ℃, 1 when the engine coolant temperature is greater than 100 ℃, and 0.94 when the engine coolant temperature is greater than or equal to 85 ℃ and less than or equal to 100 ℃. However, when the engine is in a low rotation speed, the rotation frequency of the engine crankshaft is often close to the rotation frequency of the engine fan, and if the vibration amplitude of the engine crankshaft is in the same order of magnitude as the vibration amplitude of the engine fan, beat frequency is caused, so that the comfort of the whole vehicle is reduced. For example, in the idle condition, the rotation speed of the engine crankshaft is 700rpm, the speed ratio of the engine fan is 0.9, at this time, the rotation frequency of the engine crankshaft is 11.67Hz, the rotation frequency of the engine fan is 10.5Hz, and the difference between the rotation frequency of the engine crankshaft and the rotation frequency of the engine fan is 1.17Hz, that is, the rotation frequency of the engine crankshaft and the rotation frequency of the engine fan are close to each other, and if the vibration amplitude of the engine crankshaft and the vibration amplitude of the engine fan are in the same order of magnitude, an idle beat frequency occurs.
The technical scheme of the invention aims to solve the problems in the prior art and provides the following solving ideas: when the temperature of the engine coolant is at the optimal working temperature, the speed ratio of the engine fan is adjusted based on the rotating speed of the engine, the rotating frequency of the engine crankshaft is prevented from being close to the rotating frequency of the engine fan, and the purpose of eliminating the beat frequency phenomenon is achieved.
The embodiment of the invention provides a method for controlling the rotation of an engine fan, which can avoid the rotation frequency of an engine crankshaft from being close to the rotation frequency of the engine fan, eliminate beat frequency and improve the comfort of the whole vehicle.
Fig. 1 is a first schematic flow chart of a method for controlling rotation of an engine fan according to an embodiment of the present invention, as shown in fig. 1, the method according to the embodiment of the present invention includes:
step S101, obtaining the current temperature of the cooling liquid of the engine.
In the embodiment of the invention, the engine coolant can protect the normal and good running of the engine. The engine coolant may be an aqueous solution of ethylene glycol, an organic acid solution, or the like. The temperature of the engine coolant is different, and the rotational speed of the fan required to adjust the temperature of the coolant is also different. The current temperature of the cooling liquid of the engine is collected through a temperature sensor.
Step S102, if the current temperature of the cooling liquid of the engine is larger than or equal to a first temperature threshold value and smaller than or equal to a second temperature threshold value, the current rotating speed of the crankshaft of the engine is obtained.
In the embodiment of the invention, the fact that the current temperature of the coolant of the engine is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold indicates that the coolant is at the optimal temperature when the engine is in the working state. The first and second temperature thresholds are typically set based on historical experience. For example, the first temperature threshold is set to 85 ℃ and the second temperature threshold is set to 100 ℃, i.e., the optimum temperature of the coolant is 85 ℃ to 100 ℃ when the engine is in an operating state.
In the embodiment of the invention, the current rotating speed of the crankshaft of the engine is acquired through the rotating speed sensor. The rotation speed sensor may be a magnetic-sensing rotation speed sensor, a magnetoelectric rotation speed sensor, a capacitive rotation speed sensor, etc., and the embodiment of the present invention is not particularly limited.
And step S103, determining a first target speed ratio of the engine fan according to the current rotating speed of the crankshaft of the engine, and controlling the engine fan to rotate according to the first target speed ratio.
In an embodiment of the present invention, the fan speed ratio is a ratio of the fan speed to the engine crankshaft speed. The method comprises the steps of determining a first target speed ratio of an engine fan according to the current rotating speed of an engine crankshaft, enabling the rotating frequency of the engine crankshaft to be equal to the rotating frequency of the engine fan, or enabling the difference between the rotating frequency of the engine crankshaft and the rotating frequency of the engine fan to be larger than a preset frequency threshold value, and avoiding the rotating frequency of the engine crankshaft to be close to the rotating frequency of the engine fan.
For example, if the difference between the rotational frequency of the engine crankshaft and the rotational frequency of the engine fan is set to be less than 2Hz, the beat frequency phenomenon occurs if the vibration amplitude of the engine crankshaft and the vibration amplitude of the engine fan are in the same order of magnitude. If the rotation frequency of the engine crankshaft is 1200rpm, the first target speed ratio of the engine fan is 0.9, and at the moment, the difference between the rotation frequency of the engine crankshaft and the rotation frequency of the engine fan is not less than 2Hz, and no matter whether the vibration amplitude of the engine crankshaft and the vibration amplitude of the engine fan are in the same order of magnitude or not, the beat frequency phenomenon does not occur.
According to the embodiment of the invention, when the temperature of the current cooling liquid of the engine is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, the speed ratio of the engine fan is adjusted according to the current rotating speed of the engine crankshaft, so that the rotating frequency of the engine crankshaft is prevented from being close to the frequency of the engine fan, the beat frequency is eliminated, and the comfort of the whole vehicle is improved.
As an embodiment of the present invention, on the basis of the above-described embodiment shown in fig. 1, controlling the engine fan to rotate according to the first target speed ratio includes:
a target speed of the engine fan is determined based on the current speed of the engine crankshaft and the first target speed ratio, and the engine fan is controlled to rotate at the target speed.
In the embodiment of the invention, the product of the current rotating speed of the crankshaft of the engine and the first target speed ratio is the target rotating speed of the engine fan, and the engine fan is controlled to rotate at the target rotating speed.
Fig. 2 is a second flowchart illustrating a method for controlling rotation of an engine fan according to an embodiment of the present invention, which describes in detail one possible implementation manner of determining a first target speed ratio of the engine fan according to a current rotation speed of a crankshaft of an engine in step S103 based on the embodiment shown in fig. 1, and as shown in fig. 2, the method according to the embodiment of the present invention includes:
step S201, obtaining a preset corresponding relation between the rotating speed of the engine crankshaft and the speed ratio of the engine fan.
Step S202, a first target speed ratio of the engine fan is determined according to the preset corresponding relation and the current rotating speed of the engine crankshaft.
In the embodiment of the invention, the corresponding relation between the engine crankshaft speed and the engine fan speed ratio is usually obtained by calibration according to historical experience. The predetermined correspondence between engine crankshaft speed and engine fan speed ratio may be pre-stored in memory for retrieval as needed.
As an embodiment of the present invention, on the basis of the embodiment shown in fig. 2, obtaining a preset corresponding relationship between the engine crankshaft rotation speed and the engine fan speed ratio, and determining a first target speed ratio of the engine fan according to the preset corresponding relationship and the current rotation speed of the engine crankshaft includes:
if the current rotating speed of the crankshaft of the engine is less than or equal to a first rotating speed threshold value, determining that a first target speed ratio of an engine fan is 1;
if the current rotating speed of the engine crankshaft is greater than the first rotating speed threshold and less than the second rotating speed threshold, determining that the first target speed ratio of the engine fan is a first sub-target speed ratio, wherein the first sub-target speed ratio is less than 1;
and if the current rotating speed of the engine crankshaft is greater than or equal to the second rotating speed threshold, determining that the first target speed ratio of the engine fan is a second sub-target speed ratio, wherein the second sub-target speed ratio is smaller than the first sub-target speed ratio.
In the embodiment of the invention, the current rotating speed of the engine crankshaft is less than or equal to the first rotating speed threshold value to indicate that the engine crankshaft is currently at a low rotating speed, the current rotating speed of the engine crankshaft is greater than or equal to the second rotating speed threshold value to indicate that the engine crankshaft is currently at a high rotating speed, and the current rotating speed of the engine crankshaft is greater than the first rotating speed threshold value and less than the second rotating speed threshold value to indicate that the engine crankshaft is currently at an intermediate rotating speed. Under the condition of the same speed ratio of the engine fan, the lower the rotating speed of the engine crankshaft is, the smaller the difference value between the rotating frequency of the engine crankshaft and the rotating frequency of the engine fan is, and the beat frequency phenomenon is easier to occur. That is, a large engine fan speed ratio is required when the rotational speed of the engine crankshaft is low, and a small fan speed ratio is required when the rotational speed of the engine fan is high.
In the embodiment of the present invention, the preset correspondence between the rotational speed of the crankshaft of the engine and the speed ratio of the engine fan may be stored as a preset correspondence list, and after the current rotational speed of the crankshaft of the engine is obtained, the speed ratio of the engine fan corresponding to the current rotational speed of the crankshaft of the engine is queried in the preset correspondence list as the first target speed ratio.
For example, the first rotational speed threshold is set to 1200rpm, and the second rotational speed threshold is set to 1800 rpm. The preset correspondence list may be scaled as: when the rotating speed of the engine crankshaft is less than or equal to 1200rpm, the speed ratio of the engine fan is 1, when the rotating speed of the engine crankshaft is more than 1200rpm and less than 1800rpm, the speed ratio of the engine fan is 0.9, and when the rotating speed of the engine crankshaft is more than or equal to 1800rpm, the speed ratio of the engine fan is 0.82. And inquiring the preset corresponding relation list according to the current rotating speed of the crankshaft of the engine to obtain the speed ratio of the engine fan as a first target speed ratio.
According to the embodiment of the invention, the corresponding relation between the rotating speed of the crankshaft of the engine and the speed ratio of the fan of the engine is established, and the first target speed ratio of the fan of the engine is obtained according to the current rotating speed of the crankshaft of the engine and the preset corresponding relation, so that the operation is simple and convenient.
As an embodiment of the present invention, the method of the embodiment of the present invention may further include:
when the current temperature of the cooling liquid of the engine is smaller than a first temperature threshold value, controlling the fan of the engine to rotate according to a second target speed ratio;
and controlling the engine fan to rotate according to a third target speed ratio when the current temperature of the coolant of the engine is greater than the second temperature threshold value.
In the embodiment of the invention, the condition that the current temperature of the cooling liquid of the engine is lower than the first temperature threshold value indicates that the cooling liquid of the engine is at a lower temperature, and the fan of the engine runs at a lower rotating speed, so that the heat dissipation requirement of the engine can be met, and energy can be saved. For example, when the temperature of the engine coolant is less than 85 ℃, the speed ratio of the engine fan is set to 0.85 as the second target speed ratio regardless of the rotation speed of the engine crankshaft.
The current temperature of the engine coolant being greater than the second temperature threshold indicates that the engine coolant is at a higher temperature and the engine fan must be operated at a higher speed to meet the engine heat dissipation requirements. For example, when the temperature of the engine coolant is greater than 100 ℃, the speed ratio of the engine fan is set to 1 as the third target speed ratio regardless of the rotation speed of the engine crankshaft.
According to the embodiment of the invention, when the engine cooling liquid is at a lower temperature or a higher temperature, the rotating speed of the engine fan is set according to the temperature of the engine cooling liquid so as to meet the requirement of heat dissipation of the engine.
Fig. 3 is a third schematic flow chart of a method for controlling rotation of an engine fan according to an embodiment of the present invention, and as shown in fig. 3, the method according to the embodiment of the present invention includes:
in step S301, the current temperature of the engine coolant is acquired.
In step S302, if the current temperature of the coolant of the engine is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, a first vibration amplitude of the crankshaft of the engine and a second vibration amplitude of the fan of the engine are obtained.
Step S303, determining whether a difference between the first vibration amplitude and the second vibration amplitude is greater than a preset threshold, if so, performing step S304, and if not, performing steps S305 to S306.
In step S304, the engine fan is controlled to rotate according to the fourth target speed ratio.
In step S305, the current rotational speed of the engine crankshaft is acquired.
And S306, determining a first target speed ratio of the engine fan according to the current rotating speed of the crankshaft of the engine, and controlling the engine fan to rotate according to the first target speed ratio.
In the embodiment of the invention, the first vibration amplitude is the vibration amplitude of the crankshaft of the engine at the current rotation frequency, and the second vibration amplitude is the vibration amplitude of the fan of the engine at the current rotation frequency. A first vibration amplitude of the engine crankshaft and a second vibration amplitude of the engine fan may be collected via an acceleration sensor. The difference between the first vibration amplitude and the second vibration amplitude is greater than a preset threshold value, indicating that the difference between the first vibration amplitude and the second vibration amplitude is not in the same order of magnitude.
In the embodiment of the invention, two conditions for the beat frequency phenomenon are that the rotation frequency of the crankshaft of the engine is close to the rotation frequency of the fan of the engine, and the vibration amplitude of the crankshaft of the engine is in the same order of magnitude as that of the fan of the engine. According to the embodiment of the invention, whether the vibration amplitude of the crankshaft of the engine and the vibration amplitude of the fan of the engine are in the same order of magnitude is judged firstly, if the vibration amplitude of the crankshaft of the engine and the vibration amplitude of the fan of the engine are not in the same order of magnitude, no beat frequency phenomenon occurs no matter whether the rotation frequency of the crankshaft of the engine is close to the rotation frequency of the fan of the engine, and at the moment, the fan of the engine is controlled to rotate according to the fourth target speed ratio. The fourth target speed ratio may be dynamically adjusted based on a current temperature of the engine coolant.
Fig. 4 is a schematic structural diagram of an engine fan rotation control device according to an embodiment of the present invention, and as shown in fig. 4, an engine fan rotation control device 400 according to an embodiment of the present invention may include: a first obtaining module 401, a second obtaining module 402 and a control module 403, where the functions of the modules are as follows:
the first obtaining module 401 is used for obtaining the current temperature of the cooling liquid of the engine.
A second obtaining module 402 is configured to obtain a current speed of a crankshaft of the engine if a current coolant temperature of the engine is greater than or equal to a first temperature threshold and less than or equal to a second temperature threshold.
The control module 403 is configured to determine a first target speed ratio of the engine fan based on a current speed of the crankshaft of the engine and control the engine fan to rotate according to the first target speed ratio.
As an embodiment of the present invention, the control module 403 is specifically configured to obtain a preset corresponding relationship between the engine crankshaft speed and the engine fan speed ratio;
and determining a first target speed ratio of the engine fan according to the preset corresponding relation and the current rotating speed of the engine crankshaft.
As one embodiment of the invention, the control module 403 is specifically configured to determine that a first target speed ratio of the engine fan is 1 if the current speed of the engine crankshaft is less than or equal to a first speed threshold;
if the current rotating speed of the engine crankshaft is greater than the first rotating speed threshold and less than the second rotating speed threshold, determining that the first target speed ratio of the engine fan is a first sub-target speed ratio, wherein the first sub-target speed ratio is less than 1;
and if the current rotating speed of the engine crankshaft is greater than or equal to the second rotating speed threshold, determining that the first target speed ratio of the engine fan is a second sub-target speed ratio, wherein the second sub-target speed ratio is smaller than the first sub-target speed ratio.
As one embodiment of the invention, the control module 403 is further configured to control the engine fan to rotate according to a second target speed ratio when the current coolant temperature of the engine is less than the first temperature threshold.
As one embodiment of the invention, the control module 403 is further configured to control the engine fan to rotate according to a third target speed ratio when the current coolant temperature of the engine is greater than the second temperature threshold.
As one embodiment of the invention, the control module 403 is specifically configured to determine a target speed of the engine fan based on a current speed of the engine crankshaft and the first target speed ratio, and to control the engine fan to rotate at the target speed.
As one embodiment of the invention, the second obtaining module 402 is further configured to obtain a first vibration amplitude of a crankshaft of the engine and a second vibration amplitude of a fan of the engine if a current coolant temperature of the engine is greater than or equal to a first temperature threshold and less than or equal to a second temperature threshold. The control module 403 is further configured to control the engine fan to rotate according to a fourth target speed ratio if a difference between the first vibration amplitude and the second vibration amplitude is greater than a preset threshold. The second obtaining module 402 is specifically configured to obtain the current rotation speed of the engine crankshaft if a difference between the first vibration amplitude and the second vibration amplitude is smaller than or equal to a preset threshold.
The apparatus provided in this embodiment may be used to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
Fig. 5 is a first hardware structure diagram of an engine fan rotation control device according to an embodiment of the present invention. As shown in fig. 5, the engine fan rotation control apparatus 500 of the present embodiment includes: controller 501, temperature sensor 502, rotational speed sensor 503. The temperature sensor 502 and the rotation speed sensor 503 are connected to the controller 501. Wherein, the temperature sensor 502 is used for collecting the current coolant temperature of the engine. The speed sensor 503 is used to detect the current speed of the engine crankshaft. The controller 501 is used to execute computer-executable instructions to implement the engine fan rotation control method in the above-described embodiment. Reference may be made in particular to the description relating to the method embodiments described above.
Fig. 6 is a second schematic diagram of a hardware structure of an engine fan rotation control device according to an embodiment of the present invention. As shown in fig. 6, the engine fan rotation control apparatus of the present embodiment may further include an electromagnetic clutch that is connected between the controller and the engine fan, the controller controlling the engine fan speed ratio through the electromagnetic clutch.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to implement the solution of the present embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit. The unit formed by the modules can be realized in a hardware form, and can also be realized in a form of hardware and a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a controller to execute some steps of the engine fan rotation control method according to various embodiments of the present application.
It should be understood that the controller may be a Central Processing Unit (CPU), other general purpose controllers, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. The general controller may be a microcontroller or the controller may be any conventional controller or the like. The steps of the method disclosed in connection with the present invention may be embodied directly in a hardware controller, or in a combination of the hardware and software modules within the controller.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. An engine fan rotation control method, characterized by comprising:
acquiring the current temperature of the cooling liquid of the engine;
if the current temperature of the cooling liquid of the engine is greater than or equal to a first temperature threshold and less than or equal to a second temperature threshold, acquiring the current rotating speed of the crankshaft of the engine;
determining a first target speed ratio of the engine fan according to the current rotating speed of the engine crankshaft, and controlling the engine fan to rotate according to the first target speed ratio;
when the current coolant temperature of the engine is smaller than the first temperature threshold value, controlling the engine fan to rotate according to a second target speed ratio;
when the current coolant temperature of the engine is greater than the second temperature threshold value, controlling the engine fan to rotate according to a third target speed ratio;
before the obtaining of the current rotating speed of the crankshaft of the engine, the method further comprises:
acquiring a first vibration amplitude of the engine crankshaft and a second vibration amplitude of the engine fan;
if the difference value of the first vibration amplitude and the second vibration amplitude is larger than a preset threshold value, controlling the engine fan to rotate according to a fourth target speed ratio;
the acquiring the current rotating speed of the engine crankshaft comprises the following steps:
and if the difference value of the first vibration amplitude and the second vibration amplitude is smaller than or equal to the preset threshold value, acquiring the current rotating speed of the engine crankshaft.
2. The method of claim 1, wherein said determining a first target speed ratio of the engine fan based on a current speed of the engine crankshaft comprises:
acquiring a preset corresponding relation between the rotating speed of a crankshaft of the engine and the speed ratio of a fan of the engine;
and determining a first target speed ratio of the engine fan according to the preset corresponding relation and the current rotating speed of the engine crankshaft.
3. The method of claim 2, wherein said obtaining a preset correspondence of engine crankshaft speed to engine fan speed ratio, and determining a first target speed ratio of the engine fan based on the preset correspondence and a current speed of the engine crankshaft, comprises:
if the current rotating speed of the engine crankshaft is less than or equal to a first rotating speed threshold value, determining that a first target speed ratio of the engine fan is 1;
if the current rotating speed of the engine crankshaft is greater than the first rotating speed threshold and less than a second rotating speed threshold, determining that a first target speed ratio of the engine fan is a first sub-target speed ratio, wherein the first sub-target speed ratio is less than 1;
and if the current rotating speed of the engine crankshaft is greater than or equal to the second rotating speed threshold, determining that the first target speed ratio of the engine fan is a second sub-target speed ratio, wherein the second sub-target speed ratio is smaller than the first sub-target speed ratio.
4. The method of any of claims 1-3, wherein said controlling said engine fan to rotate according to said first target speed ratio comprises:
and determining the target rotating speed of the engine fan according to the current rotating speed of the engine crankshaft and the first target speed ratio, and controlling the engine fan to rotate at the target rotating speed.
5. An engine fan rotation control apparatus, characterized by comprising:
the first acquisition module is used for acquiring the current coolant temperature of the engine;
the second obtaining module is used for obtaining the current rotating speed of the crankshaft of the engine if the current temperature of the cooling liquid of the engine is greater than or equal to a first temperature threshold and less than or equal to a second temperature threshold;
the control module is used for determining a first target speed ratio of the engine fan according to the current rotating speed of the engine crankshaft and controlling the engine fan to rotate according to the first target speed ratio;
the control module is further used for controlling the engine fan to rotate according to a second target speed ratio when the current coolant temperature of the engine is smaller than the first temperature threshold;
the control module is further used for controlling the engine fan to rotate according to a third target speed ratio when the current coolant temperature of the engine is greater than the second temperature threshold;
if the current coolant temperature of the engine is greater than or equal to a first temperature threshold and less than or equal to a second temperature threshold, the first obtaining module is further configured to:
acquiring a first vibration amplitude of the engine crankshaft and a second vibration amplitude of the engine fan;
if the difference value of the first vibration amplitude and the second vibration amplitude is larger than a preset threshold value, controlling the engine fan to rotate according to a fourth target speed ratio;
the acquiring the current rotating speed of the engine crankshaft comprises the following steps:
and if the difference value of the first vibration amplitude and the second vibration amplitude is smaller than or equal to the preset threshold value, acquiring the current rotating speed of the engine crankshaft.
6. An engine fan rotation control apparatus, characterized by comprising:
a controller, a temperature sensor and a rotating speed sensor;
the temperature sensor and the rotating speed sensor are respectively connected with the controller;
the temperature sensor is used for collecting the current temperature of the cooling liquid of the engine;
the rotating speed sensor is used for acquiring the current rotating speed of the engine crankshaft;
the controller for executing the engine fan rotation control method according to any one of claims 1 to 4.
7. A computer-readable storage medium having computer-executable instructions embodied therein, which when executed by a controller, implement the engine fan rotation control method of any one of claims 1 to 4.
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| CN202010100006.1A CN111255554B (en) | 2020-02-18 | 2020-02-18 | Engine fan rotation control method and apparatus |
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| CN202010100006.1A CN111255554B (en) | 2020-02-18 | 2020-02-18 | Engine fan rotation control method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112160828B (en) * | 2020-09-28 | 2021-08-27 | 三一重机有限公司 | Medium temperature control system and method and engineering vehicle |
| CN112360637A (en) * | 2020-10-23 | 2021-02-12 | 安徽江淮汽车集团股份有限公司 | Method for solving intermittent jitter in idling vehicle |
| CN113586223B (en) * | 2021-08-27 | 2022-11-29 | 潍柴动力股份有限公司 | Rotating speed control method and device of electric control silicone oil fan and vehicle |
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| JP4517892B2 (en) * | 2005-02-28 | 2010-08-04 | マツダ株式会社 | Cooling device for vehicle engine |
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| JP2001193460A (en) * | 2000-01-07 | 2001-07-17 | Fuji Heavy Ind Ltd | Rotational speed control device for motor-driven cooling fan |
| CN101253315A (en) * | 2005-08-29 | 2008-08-27 | 株式会社小松制作所 | Control device for hydraulically driven fan |
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