CN117489624A - Cooling fan rotating speed control method and related equipment - Google Patents
Cooling fan rotating speed control method and related equipment Download PDFInfo
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- CN117489624A CN117489624A CN202311549501.0A CN202311549501A CN117489624A CN 117489624 A CN117489624 A CN 117489624A CN 202311549501 A CN202311549501 A CN 202311549501A CN 117489624 A CN117489624 A CN 117489624A
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- 238000001816 cooling Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 192
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- 239000000835 fiber Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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Abstract
A cooling fan rotating speed control method and related equipment. The method comprises the following steps: determining an initial fan speed requirement value based on an actual engine load, an actual engine water temperature change rate, an actual retarder load, an actual engine water temperature and an actual retarder water temperature at the same time; obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the actual speed of the vehicle and the actual load of the engine at the same moment; and calculating the sum of the initial fan rotating speed demand value and the fan rotating speed demand feedback value, taking the sum as a target fan rotating speed demand value, and controlling the rotation of the fan based on the target fan rotating speed demand value, wherein the fan can be started or closed in advance in a retarded manner according to the retarder load or the engine load due to the fact that the fan rotating speed demand feedback value is increased, the situation that the fan is suddenly fully opened or suddenly fully closed is avoided, and the technical problem of noise interference caused by the fact that the fan is suddenly fully opened or fully closed in the related art is solved.
Description
Technical Field
The application relates to the technical field of engine control, in particular to a cooling fan rotating speed control method and related equipment.
Background
The retarder is a device commonly used for heavy commercial vehicles, can assist the vehicle to slow down, control the speed of the vehicle when the vehicle descends, and assist or replace braking. At present, the maximum heating value of the retarder is higher than that of the full-load operation of the engine when the retarder works, so that the heat dissipation requirement of the cooling fan is larger when the retarder works.
In the related art, when the retarder works beyond a certain load, the retarder is cooled by controlling the cooling fan to be fully opened, but noise caused by suddenly fully opened or fully closed of the cooling fan is unacceptable to a user, so that how to avoid noise interference caused by suddenly fully opened or fully closed of the cooling fan is a technical problem to be solved urgently.
Disclosure of Invention
The application provides a cooling fan rotating speed control method and related equipment, which can solve the technical problem of noise interference caused by suddenly full-opening or full-closing of a cooling fan in the prior art.
In a first aspect, an embodiment of the present application provides a cooling fan rotation speed control method, including:
acquiring an actual load of an engine, an actual load of a retarder, an actual speed of a vehicle, a change rate of water temperature of the engine, an actual water temperature of the engine and an actual water temperature of the retarder at the same moment;
determining an initial fan speed demand based on the engine actual load, the engine water temperature change rate, the retarder actual load, the engine actual water temperature, and the retarder actual water temperature;
obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the actual water temperature of the engine, the actual vehicle speed of the vehicle and the actual load of the engine;
and calculating the sum of the initial fan speed demand value and the fan speed demand feedback value, taking the sum as a target fan speed demand value, and controlling the fan to rotate based on the target fan speed demand value.
With reference to the first aspect, in an implementation manner, the step of determining the initial fan speed requirement value based on the actual engine load, the engine water temperature change rate, the actual retarder load, the actual engine water temperature, and the actual retarder water temperature includes:
determining a first fan speed demand corresponding to an actual engine water temperature and an actual engine load based on a correspondence between the engine water temperature, the engine load, and the fan speed demand;
determining a second fan speed demand corresponding to the engine water temperature change rate and the actual engine water temperature based on a correspondence between the engine water temperature change rate, the engine water temperature, and the fan speed demand;
determining a third fan rotation speed requirement value corresponding to the actual water temperature of the retarder based on the corresponding relation between the water temperature of the retarder and the fan rotation speed requirement value;
determining a fourth fan speed requirement value corresponding to the actual load of the retarder based on a corresponding relation between the load of the retarder and the fan speed requirement value;
a maximum value among the first fan speed demand, the second fan speed demand, the third fan speed demand, and the fourth fan speed demand is determined as an initial fan speed demand.
With reference to the first aspect, in an implementation manner, the step of obtaining a fan rotation speed demand feedback value through PID closed-loop control based on the actual water temperature of the engine, the actual vehicle speed of the vehicle, and the actual load of the engine includes:
determining an actual speed of the vehicle and an engine target water temperature corresponding to the engine load based on a correspondence between the actual speed of the vehicle, the engine load and the engine water temperature;
calculating a difference value of the actual water temperature of the engine minus the target water temperature of the engine;
and obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the difference value.
With reference to the first aspect, in one implementation, the retarder load is a maximum of an absolute value of a percent of actual retarder torque and an absolute value of a percent of retarder demand torque.
With reference to the first aspect, in one implementation manner, the cooling fan rotation speed control method includes:
when the retarder water temperature signal cannot be obtained, an alarm prompt is generated, and the engine water temperature signal is used as the retarder water temperature signal.
In a second aspect, embodiments of the present application provide a cooling fan rotation speed control apparatus, including:
the acquisition module is used for acquiring the actual load of the engine, the actual load of the retarder, the actual speed of the vehicle, the change rate of the water temperature of the engine, the actual water temperature of the engine and the actual water temperature of the retarder at the same moment;
a determining module configured to determine an initial fan speed demand based on the engine actual load, the engine water temperature change rate, the retarder actual load, the engine actual water temperature, and the retarder actual water temperature;
the calculation module is used for obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the actual water temperature of the engine, the actual vehicle speed of the vehicle and the actual load of the engine;
and the control module is used for calculating the sum of the initial fan rotating speed demand value and the fan rotating speed demand feedback value, taking the sum as a target fan rotating speed demand value, and controlling the fan to rotate based on the target fan rotating speed demand value.
With reference to the second aspect, in one implementation manner, the determining module is configured to:
determining a first fan speed demand corresponding to an actual engine water temperature and an actual engine load based on a correspondence between the engine water temperature, the engine load, and the fan speed demand;
determining a second fan speed demand corresponding to the engine water temperature change rate and the actual engine water temperature based on a correspondence between the engine water temperature change rate, the engine water temperature, and the fan speed demand;
determining a third fan rotation speed requirement value corresponding to the actual water temperature of the retarder based on the corresponding relation between the water temperature of the retarder and the fan rotation speed requirement value;
determining a fourth fan speed requirement value corresponding to the actual load of the retarder based on a corresponding relation between the load of the retarder and the fan speed requirement value;
a maximum value among the first fan speed demand, the second fan speed demand, the third fan speed demand, and the fourth fan speed demand is determined as an initial fan speed demand.
With reference to the second aspect, in one implementation manner, the computing module is configured to:
determining an actual speed of the vehicle and an engine target water temperature corresponding to the engine load based on a correspondence between the actual speed of the vehicle, the engine load and the engine water temperature;
calculating a difference value of the actual water temperature of the engine minus the target water temperature of the engine;
and obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the difference value.
In a third aspect, embodiments of the present application provide a cooling fan rotational speed control apparatus, including a processor, a memory, and a cooling fan rotational speed control program stored on the memory and executable by the processor, wherein the cooling fan rotational speed control program, when executed by the processor, implements the steps of the cooling fan rotational speed control method as described above.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium having a cooling fan rotational speed control program stored thereon, wherein the cooling fan rotational speed control program, when executed by a processor, implements the steps of the cooling fan rotational speed control method as described above.
The beneficial effects that technical scheme that this application embodiment provided include at least:
the method comprises the steps of obtaining an actual load of an engine, an actual load of a retarder, an actual speed of a vehicle, a change rate of water temperature of the engine, an actual water temperature of the engine and an actual water temperature of the retarder at the same moment; determining an initial fan speed demand based on the engine actual load, the engine water temperature change rate, the retarder actual load, the engine actual water temperature, and the retarder actual water temperature; obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the actual water temperature of the engine, the actual vehicle speed of the vehicle and the actual load of the engine; and calculating the sum of the initial fan rotating speed demand value and the fan rotating speed demand feedback value, taking the sum as a target fan rotating speed demand value, and controlling the rotation of the fan based on the target fan rotating speed demand value, wherein the fan can be started or closed in advance slowly according to the retarder load or the engine load due to the fact that the fan rotating speed demand feedback value is increased, the situation that the fan is suddenly fully opened or suddenly fully closed can not occur, and the technical problem of noise interference caused by the fact that the fan is suddenly fully opened or fully closed in the related technology is solved.
Drawings
FIG. 1 is a flow chart of an embodiment of a method for controlling a rotational speed of a cooling fan according to the present disclosure;
FIG. 2 is a schematic diagram of a refinement flow chart of step S20 in FIG. 1 of the present application;
FIG. 3 is a schematic diagram of a refinement flow chart of step S30 in FIG. 1 of the present application;
FIG. 4 is a schematic diagram of functional modules of an embodiment of a cooling fan speed control device according to the present disclosure;
fig. 5 is a schematic diagram of a hardware configuration of a cooling fan rotation speed control apparatus according to an embodiment of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the foregoing drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus. The terms "first," "second," and "third," etc. are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order, and are not limited to the fact that "first," "second," and "third" are not identical.
In the description of embodiments of the present application, "exemplary," "such as," or "for example," etc., are used to indicate an example, instance, or illustration. Any embodiment or design described herein as "exemplary," "such as" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "such as" or "for example," etc., is intended to present related concepts in a concrete fashion.
In the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: the three cases where a exists alone, a and B exist together, and B exists alone, and in addition, in the description of the embodiments of the present application, "plural" means two or more than two.
In some of the processes described in the embodiments of the present application, a plurality of operations or steps occurring in a particular order are included, but it should be understood that these operations or steps may be performed out of the order in which they occur in the embodiments of the present application or in parallel, the sequence numbers of the operations merely serve to distinguish between the various operations, and the sequence numbers themselves do not represent any order of execution. In addition, the processes may include more or fewer operations, and the operations or steps may be performed in sequence or in parallel, and the operations or steps may be combined.
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In a first aspect, an embodiment of the present application provides a cooling fan rotation speed control method.
In an embodiment, referring to fig. 1, fig. 1 is a flowchart illustrating an embodiment of a cooling fan speed control method according to the present application. As shown in fig. 1, the cooling fan rotation speed control method includes:
step S10, obtaining the actual load of the engine, the actual load of the retarder, the actual speed of the vehicle, the change rate of the water temperature of the engine, the actual water temperature of the engine and the actual water temperature of the retarder at the same moment;
in this embodiment, the actual load of the engine, the actual load of the retarder, the actual speed of the vehicle, the rate of change of the engine water temperature, the actual water temperature of the engine, and the actual water temperature of the retarder are obtained at the same time. The actual water temperature of the engine is obtained through a water temperature sensor on the engine, and the actual water temperature of the retarder is obtained through a water temperature sensor on the retarder. The actual vehicle speed of the vehicle is acquired by a vehicle speed sensor. At any time, for example, the engine water temperature change rate at time t1 is the engine water temperature change rate of the period from time t0 to time t1, wherein the time t0 is the time before the time t1, and the period from time t0 to time t1 is equal to the preset period. The actual load of the engine is the torque of the engine, and the torque value is calculated through a torque model of the engine.
Further, in an embodiment, the retarder load is the maximum of an absolute value of a percent of actual torque of the retarder and an absolute value of a percent of torque required of the retarder.
In this embodiment, due to the difference of retarder types, some retarders have no actual torque percentage signal of the retarder, but have a required torque percentage signal of the retarder, and if the retarder is controlled based on the actual torque percentage signal of the retarder, the retarder cannot be controlled, so that the fault tolerance of the system can be improved in a manner that the maximum value of the absolute value of the actual torque percentage of the retarder and the absolute value of the required torque percentage of the retarder is the retarder load.
Step S20, determining an initial fan speed requirement value based on the actual engine load, the engine water temperature change rate, the actual retarder load, the actual engine water temperature and the actual retarder water temperature;
in this embodiment, since the retarder and the engine are both required to control the operation of the engine fan to dissipate heat during operation, the initial fan rotational speed requirement value is determined from the actual engine load, the actual engine water temperature change rate, the actual retarder load, the actual engine water temperature, and the actual retarder water temperature, and the initial fan rotational speed requirement values in different usage scenarios can be determined.
Further, referring to fig. 2, fig. 2 is a detailed flow chart of step S20 in fig. 1 of the present application. As shown in fig. 2, step S20 includes:
step S201, determining a first fan speed requirement value corresponding to the actual water temperature of the engine and the actual load of the engine based on the corresponding relation among the water temperature of the engine, the load of the engine and the fan speed requirement value;
step S202, determining a second fan speed requirement value corresponding to the engine water temperature change rate and the actual water temperature of the engine based on the corresponding relation among the engine water temperature change rate, the engine water temperature and the fan speed requirement value;
step S203, determining a third fan rotation speed requirement value corresponding to the actual water temperature of the retarder based on the corresponding relation between the water temperature of the retarder and the fan rotation speed requirement value;
step S204, determining a fourth fan speed requirement value corresponding to the actual load of the retarder based on the corresponding relation between the load of the retarder and the fan speed requirement value;
in step S205, the maximum value among the first fan speed demand value, the second fan speed demand value, the third fan speed demand value, and the fourth fan speed demand value is determined as the initial fan speed demand value.
In this embodiment, based on the correspondence between the engine water temperature, the engine load, and the fan rotational speed demand, the first fan rotational speed demand corresponding to the engine actual water temperature and the engine actual load is determined for the fan control to be started in advance when the engine load is high.
A second fan speed demand corresponding to the engine water temperature change rate and the actual engine water temperature is determined based on a correspondence between the engine water temperature change rate, the engine water temperature, and the fan speed demand.
And determining a third fan rotation speed requirement value corresponding to the actual water temperature of the retarder based on the corresponding relation between the water temperature of the retarder and the fan rotation speed requirement value.
And determining a fourth fan rotating speed requirement value corresponding to the actual load of the retarder based on the corresponding relation between the load of the retarder and the fan rotating speed requirement value, and using the fourth fan rotating speed requirement value for starting the fan in advance when the working load of the retarder is high.
Since the retarder and the engine do not operate simultaneously, the first fan speed demand is normally greater than the second fan speed demand when the engine is operating, and the first fan speed demand is used as the initial fan speed demand. When the engine load signal is not acquired, the second fan speed demand is used as the initial fan speed demand, so that the situation that the operation of the fan cannot be controlled is avoided.
When the retarder is in operation, the fourth fan speed demand is normally greater than the third fan speed demand, and the fourth fan speed demand is taken as the initial fan speed demand. When the retarder load signal is not acquired, the third fan speed requirement value is used as an initial fan speed requirement value, so that the situation that the operation of the fan cannot be controlled is avoided.
Determining the maximum value of the first fan speed demand, the second fan speed demand, the third fan speed demand, and the fourth fan speed demand as an initial fan speed demand, that is, determining the maximum value of the first fan speed demand and the second fan speed demand as the initial fan speed demand when the engine is operating; when the retarder is in operation, the maximum of the third fan speed demand and the fourth fan speed demand is determined as the initial fan speed demand, thereby avoiding a situation in which the operation of the fan cannot be controlled.
Step S30, obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the actual water temperature of the engine, the actual vehicle speed of the vehicle and the actual load of the engine;
in this embodiment, the actual speed of the vehicle and the target water temperature of the engine corresponding to the engine load are determined, and the fan rotation speed demand feedback value is obtained through PID closed-loop control based on the difference of the actual water temperature of the engine minus the target water temperature of the engine. The difference value of the water temperature of the engine is used as the basis of PID closed-loop control regulation, and the PID closed-loop control is calibrated and optimized according to actual operation, so that the fan rotating speed requirement changes relatively stably, and the fluctuation of the rotating speed caused by sudden and sudden low is prevented.
Further, in an embodiment, referring to fig. 3, fig. 3 is a schematic diagram of a refinement process of step S30 in fig. 1 of the present application. As shown in fig. 3, step S30 includes:
step S301 of determining an engine target water temperature corresponding to the actual vehicle speed and the engine load of the vehicle based on a correspondence between the actual vehicle speed, the engine load, and the engine water temperature of the vehicle;
step S302, calculating a difference value of subtracting the target water temperature of the engine from the actual water temperature of the engine;
step S303, obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the difference value.
In this embodiment, the closed-loop PID control fan speed requirement targets the engine water temperature, and different water temperature target values can be given for different actual vehicle speeds and engine loads of the vehicle, and when the engine works, the actual vehicle speed of the vehicle and the engine target water temperature corresponding to the engine load are determined based on the corresponding relation among the actual vehicle speed, the engine load and the engine water temperature. And obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the difference value of the actual water temperature of the engine minus the target water temperature of the engine. And determining the P parameter, the I parameter and the D parameter corresponding to the difference value of the actual water temperature of the engine minus the target water temperature of the engine based on the corresponding relation between the difference value of the actual water temperature of the engine minus the target water temperature of the engine and the PID parameter. And adding PID control items to obtain a fan rotating speed demand feedback value.
Step S40, calculating the sum of the initial fan speed demand value and the fan speed demand feedback value, taking the sum as a target fan speed demand value, and controlling the fan to rotate based on the target fan speed demand value.
In this embodiment, the sum of the initial fan rotation speed demand value and the fan rotation speed demand feedback value is used as the target fan rotation speed demand value, and the fan rotation is controlled based on the target fan rotation speed demand value, so that the cooling fan can be started or closed in advance and retarded according to the retarder load or the engine load, and the situation that the cooling fan is suddenly fully opened or suddenly fully closed is avoided.
In the embodiment, the actual load of the engine, the actual load of the retarder, the actual speed of the vehicle, the change rate of the water temperature of the engine, the actual water temperature of the engine and the actual water temperature of the retarder at the same moment are obtained; determining an initial fan speed demand based on the engine actual load, the engine water temperature change rate, the retarder actual load, the engine actual water temperature, and the retarder actual water temperature; obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the actual water temperature of the engine, the actual vehicle speed of the vehicle and the actual load of the engine; and calculating the sum of the initial fan rotating speed demand value and the fan rotating speed demand feedback value, taking the sum as a target fan rotating speed demand value, and controlling the rotation of the fan based on the target fan rotating speed demand value, wherein the fan can be started or closed in advance slowly according to the retarder load or the engine load due to the fact that the fan rotating speed demand feedback value is increased, the situation that the fan is suddenly fully opened or suddenly fully closed can not occur, and the technical problem of noise interference caused by the fact that the fan is suddenly fully opened or fully closed in the related technology is solved.
Further, in an embodiment, the cooling fan rotation speed control method includes:
when the retarder water temperature signal cannot be obtained, an alarm prompt is generated, and the engine water temperature signal is used as the retarder water temperature signal.
In this embodiment, since some retarders do not transmit retarder water temperature signals, when retarder water temperature signals cannot be obtained, an alarm prompt is generated and engine water temperature signals are used as retarder water temperature signals, so that fault tolerance of the system is improved.
Further, when the retarder water temperature signal cannot be obtained, in an embodiment, the preset water temperature is used as the retarder water temperature signal.
In a second aspect, embodiments of the present application further provide a cooling fan rotation speed control device.
In an embodiment, referring to fig. 4, fig. 4 is a schematic functional block diagram of an embodiment of a cooling fan speed control device according to the present application. As shown in fig. 4, the cooling fan rotation speed control device includes:
the acquisition module 10 is used for acquiring the actual load of the engine, the actual load of the retarder, the actual speed of the vehicle, the change rate of the water temperature of the engine, the actual water temperature of the engine and the actual water temperature of the retarder at the same moment;
a determination module 20 for determining an initial fan speed demand based on the engine actual load, the engine water temperature change rate, the retarder actual load, the engine actual water temperature, and the retarder actual water temperature;
the calculation module 30 is configured to obtain a fan rotation speed demand feedback value through PID closed-loop control based on the actual water temperature of the engine, the actual vehicle speed of the vehicle, and the actual load of the engine;
the control module 40 is configured to calculate a sum of the initial fan speed demand value and the fan speed demand feedback value, and control the fan rotation based on the target fan speed demand value with the sum as the target fan speed demand value.
Further, in an embodiment, the determining module 20 is configured to:
determining a first fan speed demand corresponding to an actual engine water temperature and an actual engine load based on a correspondence between the engine water temperature, the engine load, and the fan speed demand;
determining a second fan speed demand corresponding to the engine water temperature change rate and the actual engine water temperature based on a correspondence between the engine water temperature change rate, the engine water temperature, and the fan speed demand;
determining a third fan rotation speed requirement value corresponding to the actual water temperature of the retarder based on the corresponding relation between the water temperature of the retarder and the fan rotation speed requirement value;
determining a fourth fan speed requirement value corresponding to the actual load of the retarder based on a corresponding relation between the load of the retarder and the fan speed requirement value;
a maximum value among the first fan speed demand, the second fan speed demand, the third fan speed demand, and the fourth fan speed demand is determined as an initial fan speed demand.
Further, in an embodiment, the calculating module 30 is configured to:
determining an actual speed of the vehicle and an engine target water temperature corresponding to the engine load based on a correspondence between the actual speed of the vehicle, the engine load and the engine water temperature;
calculating a difference value of the actual water temperature of the engine minus the target water temperature of the engine;
and obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the difference value.
Further, in an embodiment, the retarder load is the maximum of an absolute value of a percent of actual torque of the retarder and an absolute value of a percent of torque required of the retarder.
Further, in an embodiment, the cooling fan speed control apparatus further includes a new module for:
when the retarder water temperature signal cannot be obtained, an alarm prompt is generated, and the engine water temperature signal is used as the retarder water temperature signal.
The function implementation of each module in the cooling fan rotation speed control device corresponds to each step in the cooling fan rotation speed control method embodiment, and the function and implementation process thereof are not described here in detail.
In a third aspect, embodiments of the present application provide a cooling fan rotational speed control apparatus, which may be an apparatus having a data processing function such as a personal computer (personal computer, PC), a notebook computer, a server, or the like.
Referring to fig. 5, fig. 5 is a schematic diagram of a hardware configuration of a cooling fan rotation speed control apparatus according to an embodiment of the present application. In an embodiment of the present application, the cooling fan speed control apparatus may include a processor, a memory, a communication interface, and a communication bus.
The communication bus may be of any type for implementing the processor, memory, and communication interface interconnections.
The communication interfaces include input/output (I/O) interfaces, physical interfaces, logical interfaces, and the like for realizing interconnection of devices inside the cooling fan speed control apparatus, and interfaces for realizing interconnection of the cooling fan speed control apparatus with other apparatuses (e.g., other computing apparatuses or user apparatuses). The physical interface may be an ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device may be a Display, a Keyboard (Keyboard), or the like.
The memory may be various types of storage media such as random access memory (randomaccess memory, RAM), read-only memory (ROM), nonvolatile RAM (non-volatileRAM, NVRAM), flash memory, optical memory, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (electrically erasable PROM, EEPROM), and the like.
The processor may be a general-purpose processor, and the general-purpose processor may call a cooling fan rotation speed control program stored in the memory and execute the cooling fan rotation speed control method provided in the embodiment of the present application. For example, the general purpose processor may be a central processing unit (central processing unit, CPU). The method executed when the cooling fan speed control program is called may refer to various embodiments of the cooling fan speed control method of the present application, and will not be described herein.
Those skilled in the art will appreciate that the hardware configuration shown in fig. 5 is not limiting of the application and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
In a fourth aspect, embodiments of the present application also provide a readable storage medium.
The readable storage medium of the present application stores a cooling fan rotational speed control program, wherein the cooling fan rotational speed control program, when executed by a processor, implements the steps of the cooling fan rotational speed control method as described above.
The method implemented when the cooling fan speed control program is executed may refer to various embodiments of the cooling fan speed control method of the present application, which are not described herein.
It should be noted that, the foregoing embodiment numbers are merely for describing the embodiments, and do not represent the advantages and disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising several instructions for causing a terminal device to perform the method described in the various embodiments of the present application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (10)
1. A cooling fan rotational speed control method, characterized by comprising:
acquiring an actual load of an engine, an actual load of a retarder, an actual speed of a vehicle, a change rate of water temperature of the engine, an actual water temperature of the engine and an actual water temperature of the retarder at the same moment;
determining an initial fan speed demand based on the engine actual load, the engine water temperature change rate, the retarder actual load, the engine actual water temperature, and the retarder actual water temperature;
obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the actual water temperature of the engine, the actual vehicle speed of the vehicle and the actual load of the engine;
and calculating the sum of the initial fan speed demand value and the fan speed demand feedback value, taking the sum as a target fan speed demand value, and controlling the fan to rotate based on the target fan speed demand value.
2. The cooling fan speed control method according to claim 1, characterized in that the step of determining an initial fan speed demand value based on the engine actual load, the engine water temperature change rate, the retarder actual load, the engine actual water temperature, and the retarder actual water temperature includes:
determining a first fan speed demand corresponding to an actual engine water temperature and an actual engine load based on a correspondence between the engine water temperature, the engine load, and the fan speed demand;
determining a second fan speed demand corresponding to the engine water temperature change rate and the actual engine water temperature based on a correspondence between the engine water temperature change rate, the engine water temperature, and the fan speed demand;
determining a third fan rotation speed requirement value corresponding to the actual water temperature of the retarder based on the corresponding relation between the water temperature of the retarder and the fan rotation speed requirement value;
determining a fourth fan speed requirement value corresponding to the actual load of the retarder based on a corresponding relation between the load of the retarder and the fan speed requirement value;
a maximum value among the first fan speed demand, the second fan speed demand, the third fan speed demand, and the fourth fan speed demand is determined as an initial fan speed demand.
3. The cooling fan rotational speed control method according to claim 1, wherein the step of obtaining a fan rotational speed demand feedback value by PID closed-loop control based on the engine actual water temperature, the actual vehicle speed of the vehicle, and the engine actual load, comprises:
determining an actual speed of the vehicle and an engine target water temperature corresponding to the engine load based on a correspondence between the actual speed of the vehicle, the engine load and the engine water temperature;
calculating a difference value of the actual water temperature of the engine minus the target water temperature of the engine;
and obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the difference value.
4. The cooling fan rotational speed control method as recited in claim 1, wherein the retarder load is a maximum of an absolute value of a percent of actual torque of the retarder and an absolute value of a percent of torque required of the retarder.
5. The cooling fan rotational speed control method according to claim 1, characterized in that the cooling fan rotational speed control method includes:
when the retarder water temperature signal cannot be obtained, an alarm prompt is generated, and the engine water temperature signal is used as the retarder water temperature signal.
6. A cooling fan rotational speed control apparatus, characterized by comprising:
the acquisition module is used for acquiring the actual load of the engine, the actual load of the retarder, the actual speed of the vehicle, the change rate of the water temperature of the engine, the actual water temperature of the engine and the actual water temperature of the retarder at the same moment;
a determining module configured to determine an initial fan speed demand based on the engine actual load, the engine water temperature change rate, the retarder actual load, the engine actual water temperature, and the retarder actual water temperature;
the calculation module is used for obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the actual water temperature of the engine, the actual vehicle speed of the vehicle and the actual load of the engine;
and the control module is used for calculating the sum of the initial fan rotating speed demand value and the fan rotating speed demand feedback value, taking the sum as a target fan rotating speed demand value, and controlling the fan to rotate based on the target fan rotating speed demand value.
7. The cooling fan rotational speed control apparatus as claimed in claim 6, wherein the determination module is configured to:
determining a first fan speed demand corresponding to an actual engine water temperature and an actual engine load based on a correspondence between the engine water temperature, the engine load, and the fan speed demand;
determining a second fan speed demand corresponding to the engine water temperature change rate and the actual engine water temperature based on a correspondence between the engine water temperature change rate, the engine water temperature, and the fan speed demand;
determining a third fan rotation speed requirement value corresponding to the actual water temperature of the retarder based on the corresponding relation between the water temperature of the retarder and the fan rotation speed requirement value;
determining a fourth fan speed requirement value corresponding to the actual load of the retarder based on a corresponding relation between the load of the retarder and the fan speed requirement value;
a maximum value among the first fan speed demand, the second fan speed demand, the third fan speed demand, and the fourth fan speed demand is determined as an initial fan speed demand.
8. The cooling fan rotational speed control apparatus as recited in claim 6, wherein the calculation module is configured to:
determining an actual speed of the vehicle and an engine target water temperature corresponding to the engine load based on a correspondence between the actual speed of the vehicle, the engine load and the engine water temperature;
calculating a difference value of the actual water temperature of the engine minus the target water temperature of the engine;
and obtaining a fan rotating speed demand feedback value through PID closed-loop control based on the difference value.
9. A cooling fan rotational speed control apparatus comprising a processor, a memory, and a cooling fan rotational speed control program stored on the memory and executable by the processor, wherein the cooling fan rotational speed control program, when executed by the processor, implements the steps of the cooling fan rotational speed control method according to any one of claims 1 to 5.
10. A computer-readable storage medium, wherein a cooling fan rotational speed control program is stored on the computer-readable storage medium, wherein the cooling fan rotational speed control program, when executed by a processor, implements the steps of the cooling fan rotational speed control method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311549501.0A CN117489624A (en) | 2023-11-17 | 2023-11-17 | Cooling fan rotating speed control method and related equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311549501.0A CN117489624A (en) | 2023-11-17 | 2023-11-17 | Cooling fan rotating speed control method and related equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117489624A true CN117489624A (en) | 2024-02-02 |
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ID=89676221
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311549501.0A Pending CN117489624A (en) | 2023-11-17 | 2023-11-17 | Cooling fan rotating speed control method and related equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117489624A (en) |
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2023
- 2023-11-17 CN CN202311549501.0A patent/CN117489624A/en active Pending
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