CN103334823B - Automobile electronic cooling fan control method and system - Google Patents
Automobile electronic cooling fan control method and system Download PDFInfo
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- CN103334823B CN103334823B CN201310301290.9A CN201310301290A CN103334823B CN 103334823 B CN103334823 B CN 103334823B CN 201310301290 A CN201310301290 A CN 201310301290A CN 103334823 B CN103334823 B CN 103334823B
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Abstract
The invention discloses an automobile electronic cooling fan control method and system. The control method comprises the followings: acquiring air conditioning request signals, pressure of a refrigerant pipeline of an air-conditioning system, automobile speed, and the temperature of automobile engine coolant liquid; controlling an electronic cooling fan to run at a high speed, or a low speed, or to stop running as per the air conditioning request signals, the pressure, the automobile speed and the temperature. According to the invention, with comprehensive consideration to three factors of an air-conditioning system, such as the pressure of the refrigerant pipeline, the automobile speed and the temperature of the engine coolant liquid, real-time control to the electronic cooling fan can be performed, the control is reasonable, the problem of electrical energy and fuel oil waste caused by overcapacity of heat dissipation in the prior art can not be caused, and while the radiating effect is optimized, the purpose of energy conservation is achieved.
Description
Technical field
The present invention relates to motor car engine cooling technology field, particularly relate to a kind of automotive electronics cooling fan control method and system.
Background technique
Electrical cooling fan is the vitals in automobile cooling system, also be the parts that in automobile electrical appliances, power consumption is very large simultaneously, its effect is that the distribution of electrical cooling fan cooling ability directly has influence on the performance of motor and the refrigeration of air-conditioning to engine water tank and air-conditioning condenser heat radiation.Electrical cooling fan, by the control of automatical control system, according to different Operating condition adjustment rotating speeds, adapts to the change of tide of motorism load, makes the heat dissipation potential of electrical cooling fan reach rational distribution, thus, make the power consumption of electrical cooling fan reach optimized process.
Fig. 1 shows the functional-block diagram of the control system of electrical cooling fan in prior art, as shown in Figure 1, air-conditioning system uses ternary pressure switch 2 detected pressures situation, containing two-way pressure switch signal in ternary pressure switch 2, one tunnel is high and low voltage switch signal, and a road is Medium voltage switch or circuit breaker signal.Air-conditioning system range of working pressure is 0.2MPa ~ 3.14MPa.When the pressure of the refrigerant line of air-conditioning system is in 0.2MPa ~ 3.14MPa, high and low voltage switch is connected; As the pressure >=1.7MPa of the refrigerant line of air-conditioning system, air-conditioning Medium voltage switch or circuit breaker is connected.
The engine control module 4 that control system comprises, for the temperature signal according to ternary pressure switch 2 signal that receives and automobile engine cooling liquid, controls electrical cooling fan 5 and closes or low speed or high speed operation.
After air-conditioning demand signal sends (press air-conditioning switch 1, have air-conditioning demand signal to send), the control mode of electrical cooling fan 5 is as follows:
When high and low voltage switch is connected, when Medium voltage switch or circuit breaker is disconnected, how low the temperature regardless of automobile engine cooling liquid is, and electrical cooling fan 5 all starts low cruise; When the temperature (detecting 3 by temperature transducer) of automobile engine cooling liquid rises to a certain temperature gradually, electrical cooling fan 5 starts high speed operation;
When high and low voltage switch is connected, when Medium voltage switch or circuit breaker is also connected, no matter how, electrical cooling fan 5 all starts high speed operation to the temperature conditions of automobile engine cooling liquid;
No matter Vehicle Speed how, and air-conditioning request sends the control mode of rear electrical cooling fan 5, and be all two kinds of situations above, after namely air-conditioning request sends, the control of electrical cooling fan 5 is irrelevant with the speed of a motor vehicle.
In above-mentioned prior art, the defect of the control system of electrical cooling fan 5 is:
1., when using ternary pressure switch 2, as long as Medium voltage switch or circuit breaker is disconnected, namely the pressure of the refrigerant line of air-conditioning system is less than 1.7MPa, and electrical cooling fan 5 all works.Ternary pressure switch 2 can not the pressure of refrigerant line of Real-Time Monitoring air-conditioning system, as judged, whether the pressure of the refrigerant line of air-conditioning system is within the scope of 0.2MPa ~ 0.6MPa, use ternary pressure switch 2 to differentiate, and electrical cooling fan 5 to work in this pressure range.In like manner, ternary pressure switch 2 can not differentiate other pressure range, thus, the heat dissipating capacity required for system can not be reflected exactly, cause heat dissipation potential superfluous, energy waste.
2., when controlling electrical cooling fan 5, not considering the impact of the speed of a motor vehicle, causing energy waste.Because when the speed of a motor vehicle very high (such as, the speed of a motor vehicle >=80km/h), the extraneous wind speed produced is very high, and electrical cooling fan 5 does not need tick-over (only when the temperature of automobile engine cooling liquid reaches certain value, fan is high speed operation).
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, provide a kind of automotive electronics cooling fan control method and system, with solving because fan operation controls unreasonable, and the problem of the electric energy causing heat dissipation potential surplus to produce and fuel oil waste.
For achieving the above object, described automotive electronics cooling fan control method, is characterized in, described controlling method comprises,
Obtain the temperature of air-conditioning demand signal, the pressure of refrigerant line of air-conditioning system, the speed of a motor vehicle of automobile and automobile engine cooling liquid;
According to described air-conditioning demand signal, pressure, the speed of a motor vehicle and temperature, control described electrical cooling fan high speed operation, low cruise or out of service.
Preferably, set in described controlling method,
4 control modes, are respectively: the first control mode, the second control mode, the 3rd control mode and the 4th control mode;
8 compression force reference value, are respectively from low to high: the first pressure, the second pressure, the 3rd pressure, the 4th pressure, the 5th pressure, the 6th pressure, the 7th pressure and the 8th pressure;
2 speed of a motor vehicle reference values, are respectively from low to high: first speed of a motor vehicle and second speed of a motor vehicle; And,
8 temperature reference value, are respectively from low to high: the 8th temperature, the first temperature, the 7th temperature, the second temperature, the 6th temperature, the 3rd temperature, the 5th temperature and the 4th temperature; Further,
The defining method of the control mode in described controlling method comprises,
Step one: initialization, detects the initial pressure of the refrigerant line of described air-conditioning system;
Step 2: according to described initial pressure determination control mode:
If described initial pressure is greater than the first pressure and is less than the 3rd pressure, then described control mode is the first control mode; If described initial pressure is more than or equal to the 3rd pressure and is less than the 5th pressure, then described control mode is the second control mode; If described initial pressure is more than or equal to the 5th pressure and is less than the 7th pressure, then described control mode is the 3rd control mode; If described initial pressure is more than or equal to the 7th pressure and is less than the 8th pressure, then described control mode is the 4th control mode;
Step 3: record current control mode, as history control mode;
Step 4: the current pressure obtaining the refrigerant line of air-conditioning system;
Step 5: upgrade described control mode according to described current pressure and described history control mode:
Be less than the 3rd pressure when described current pressure is greater than the first pressure, and when described history control mode is the second control mode, continues to judge whether described current pressure is less than or equal to the second pressure, if so, then described control mode is updated to the first control mode; Be less than the 3rd pressure when described current pressure is greater than the first pressure, and described history control mode be the 3rd control mode or the 4th control mode time, described control mode is updated to the second control mode;
Be less than the 5th pressure when described current pressure is more than or equal to the 3rd pressure, and when described history control mode is the first control mode, described control mode be updated to the second control mode; The 5th pressure is less than when described current pressure is more than or equal to the 3rd pressure, and described history control mode is when being the 3rd control mode, continue to judge whether described current pressure is less than or equal to the 4th pressure, if so, then described control mode is updated to the second control mode; Be less than the 5th pressure when described current pressure is more than or equal to the 3rd pressure, and when described history control mode is the 4th control mode, described control mode be updated to the 3rd control mode;
Be less than the 7th pressure when described current pressure is more than or equal to the 5th pressure, and described history control mode be the first control mode or the second control mode time, described control mode is updated to the 3rd control mode; The 7th pressure is less than when described current pressure is more than or equal to the 5th pressure, and described history control mode is when being the 4th control mode, continue to judge whether described current pressure is less than or equal to the 6th pressure, if so, then described control mode is updated to the 3rd control mode;
Be less than the 8th pressure when described current pressure is more than or equal to the 7th pressure, and described history control mode be the first control mode or the second control mode or the 3rd control mode time, described control mode is updated to the 4th control mode;
Step 6: repeated execution of steps three to step 6.
Preferably, also comprise in described step 5,
Be less than the 3rd pressure when described current pressure is greater than the first pressure, and when described control mode is the first control mode, described control mode still remains the first control mode;
Be less than the 5th pressure when described current pressure is more than or equal to the 3rd pressure, and when described control mode is the second control mode, described control mode still remains the second control mode;
Be less than the 7th pressure when described current pressure is more than or equal to the 5th pressure, and when described control mode is the 3rd control mode, described control mode still remains the 3rd control mode;
Be less than the 8th pressure when described current pressure is more than or equal to the 7th pressure, and when described control mode is the 4th control mode, described control mode still remains the 4th control mode.
Preferably, the first controlling method that described controlling method performs after being also included in the defining method of described control mode, the second controlling method, the 3rd controlling method or the 4th controlling method, described first controlling method comprises,
Send when there being described air-conditioning demand signal, and described control mode is the first control mode, and described temperature is when being greater than the 4th temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 5th temperature, then control described electrical cooling fan out of service.
Preferably, the second controlling method of described controlling method comprises,
When there being described air-conditioning demand signal to send, and described control mode is the second control mode, and when the described speed of a motor vehicle is less than first speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature be greater than the first temperature be less than or equal to the 3rd temperature time, control described electrical cooling fan low cruise, until when the temperature of current automobile engine cooling liquid is less than or equal to the 8th temperature, then control described electrical cooling fan out of service;
When described temperature is greater than the 3rd temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 6th temperature, then control described electrical cooling fan low cruise.
Preferably, described second controlling method also comprises,
When there being described air-conditioning demand signal to send, and described control mode is the second control mode, and the described speed of a motor vehicle is more than or equal to first speed of a motor vehicle when being less than second speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature be greater than the second temperature be less than or equal to the 3rd temperature time, control described electrical cooling fan low cruise, until when the temperature of current automobile engine cooling liquid is less than or equal to the 7th temperature, then control described electrical cooling fan out of service;
When described temperature is greater than the 3rd temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 6th temperature, then control described electrical cooling fan low cruise.
Preferably, described second controlling method also comprises,
When there being described air-conditioning demand signal to send, and described control mode is the second control mode, and when the described speed of a motor vehicle is more than or equal to second speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature is greater than the 4th temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 5th temperature, then control described electrical cooling fan out of service.
Preferably, the 3rd controlling method of described controlling method comprises,
When there being described air-conditioning demand signal to send, and described control mode is the 3rd control mode, and when the described speed of a motor vehicle is less than first speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature is less than or equal to the second temperature, control described electrical cooling fan low cruise;
When described temperature is greater than the second temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 7th temperature, then control described electrical cooling fan low cruise.
Preferably, described 3rd controlling method also comprises,
When there being described air-conditioning demand signal to send, and described control mode is the 3rd control mode, and the described speed of a motor vehicle is more than or equal to first speed of a motor vehicle when being less than second speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature be greater than the second temperature be less than or equal to the 3rd temperature time, control described electrical cooling fan low cruise, until when the temperature of current automobile engine cooling liquid is less than or equal to the 7th temperature, then control described electrical cooling fan out of service;
When described temperature is greater than the 3rd temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 6th temperature, then control described electrical cooling fan low cruise.
Preferably, described 3rd controlling method also comprises,
When there being described air-conditioning demand signal to send, and described control mode is the 3rd control mode, and when the described speed of a motor vehicle is more than or equal to second speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature is greater than the 4th temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 5th temperature, then control described electrical cooling fan out of service.
Preferably, the 4th controlling method of described controlling method comprises,
When there being described air-conditioning demand signal to send, and when described control mode is the 4th control mode, control described electrical cooling fan high speed operation.
Preferably, described first pressure is 150kPa, and described second pressure is 300kPa, described 3rd pressure is 650kPa, and described 4th pressure is 1100kPa, and described 5th pressure is 1250kPa, described 6th pressure is 1300kPa, and described 7th pressure is 1600kPa; Described 8th pressure is 3250kPa;
Described first speed of a motor vehicle is 45km/h; Described second speed of a motor vehicle is 80km/h;
Described 8th temperature is 94 DEG C; Described first temperature is 96 DEG C; Described 7th temperature is 98 DEG C; Described second temperature is 100 DEG C; Described 6th temperature is 102 DEG C; Described 3rd temperature is 104 DEG C; Described 5th temperature is 105 DEG C; Described 4th temperature is 109 DEG C.
Preferably, drive described electrical cooling fan low cruise with the driving voltage of 7V, drive described electrical cooling fan high speed operation with the driving voltage of 13.5V.
Described automotive electronics cooling fan control system, is characterized in, described control system comprises,
Pressure transducer, for detecting the pressure of the refrigerant line of air-conditioning system;
Vehicle speed sensor, for detecting the speed of a motor vehicle of automobile;
Temperature transducer, for detecting the temperature of automobile engine cooling liquid; And,
Engine control module, for obtaining air-conditioning demand signal; For according to described air-conditioning demand signal, pressure, the speed of a motor vehicle and temperature, control described electrical cooling fan high speed operation, low cruise or out of service.
Preferably, described vehicle speed sensor is rotary transformer.
Preferably, described engine control module is central processing unit (CPU), single-chip microcomputer or flush bonding processor.
Beneficial effect of the present invention is, the present invention considers these three factors of temperature of the pressure of the refrigerant line of air-conditioning system, the speed of a motor vehicle and engine coolant, electrical cooling fan is controlled in real time, control rationally, the problem of electric energy and the fuel oil waste produced because heat dissipation potential is superfluous in prior art can not be caused, while optimization radiating effect, reach energy-conservation object.
Accompanying drawing explanation
Fig. 1 shows the functional-block diagram of the control system of automotive electronics cooling fan in prior art.
Fig. 2 shows the flow chart of the controlling method of automotive electronics cooling fan of the present invention.
Fig. 3 and Fig. 4 shows the flow chart of the defining method of control mode in controlling method of the present invention, and wherein Fig. 3 shows the flow chart of the defining method of control mode under initial situation, and Fig. 4 shows the flow chart of the defining method of control mode in control procedure.
Fig. 5 shows the functional-block diagram of the control system of automotive electronics cooling fan of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Fig. 2 shows the flow chart of the controlling method of automotive electronics cooling fan of the present invention, and as shown in Figure 2, described automotive electronics cooling fan control method comprises the following steps:
Step a: the temperature S1 obtaining air-conditioning demand signal, the pressure of refrigerant line of air-conditioning system, the speed of a motor vehicle of automobile and automobile engine cooling liquid;
Step b: according to described air-conditioning demand signal, pressure, the speed of a motor vehicle and temperature, controls described electrical cooling fan high speed operation, low cruise or S2 out of service.
Particularly, first to set below with reference to value: comprising: 4 control modes, are respectively: the first control mode, the second control mode, the 3rd control mode and the 4th control mode; 8 compression force reference value, are respectively from low to high: the first pressure, the second pressure, the 3rd pressure, the 4th pressure, the 5th pressure, the 6th pressure, the 7th pressure and the 8th pressure; 2 speed of a motor vehicle reference values, are respectively from low to high: first speed of a motor vehicle and second speed of a motor vehicle; And 8 temperature reference value, are respectively from low to high: the 8th temperature, the first temperature, the 7th temperature, the second temperature, the 6th temperature, the 3rd temperature, the 5th temperature and the 4th temperature.
In a preferred embodiment of the invention, the preferred value of the reference quantity of above-mentioned setting is respectively: pressure aspect, described first pressure is 150kPa, described second pressure is 300kPa, described 3rd pressure is 650kPa, and described 4th pressure is 1100kPa, and described 5th pressure is 1250kPa, described 6th pressure is 1300kPa, and described 7th pressure is 1600kPa; Described 8th pressure is 3250kPa.Speed of a motor vehicle aspect, described first speed of a motor vehicle is 45km/h; Described second speed of a motor vehicle is 80km/h.Temperature aspect, described 8th temperature is 94 DEG C; Described first temperature is 96 DEG C; Described 7th temperature is 98 DEG C; Described second temperature is 100 DEG C; Described 6th temperature is 102 DEG C; Described 3rd temperature is 104 DEG C; Described 5th temperature is 105 DEG C; Described 4th temperature is 109 DEG C.
Then will confirm current control mode according to the pressure of the refrigerant line of air-conditioning system, with reference to Fig. 3 and Fig. 4, the defining method of described control mode is described, the MODE shown in Fig. 3 and Fig. 4 represents control mode.Described defining method comprises the following steps:
Step one: initialization, detects the initial pressure of the refrigerant line of described air-conditioning system;
Step 2: according to described initial pressure determination control mode:
If described initial pressure is greater than the first pressure and is less than the 3rd pressure, then described control mode is the first control mode; If described initial pressure is more than or equal to the 3rd pressure and is less than the 5th pressure, then described control mode is the second control mode; If described initial pressure is more than or equal to the 5th pressure and is less than the 7th pressure, then described control mode is the 3rd control mode; If described initial pressure is more than or equal to the 7th pressure and is less than the 8th pressure, then described control mode is the 4th control mode;
Step 3: record current control mode, as history control mode;
Step 4: the current pressure obtaining the refrigerant line of air-conditioning system;
Step 5: upgrade described control mode according to described current pressure and described history control mode:
Be less than the 3rd pressure when described current pressure is greater than the first pressure, and when described control mode is the first control mode, described control mode still remains the first control mode; Be less than the 3rd pressure when described current pressure is greater than the first pressure, and when described history control mode is the second control mode, continues to judge whether described current pressure is less than or equal to the second pressure, if so, then described control mode is updated to the first control mode; Be less than the 3rd pressure when described current pressure is greater than the first pressure, and described history control mode be the 3rd control mode or the 4th control mode time, described control mode is updated to the second control mode;
Be less than the 5th pressure when described current pressure is more than or equal to the 3rd pressure, and when described control mode is the second control mode, described control mode still remains the second control mode; Be less than the 5th pressure when described current pressure is more than or equal to the 3rd pressure, and when described history control mode is the first control mode, described control mode be updated to the second control mode; The 5th pressure is less than when described current pressure is more than or equal to the 3rd pressure, and described history control mode is when being the 3rd control mode, continue to judge whether described current pressure is less than or equal to the 4th pressure, if so, then described control mode is updated to the second control mode; Be less than the 5th pressure when described current pressure is more than or equal to the 3rd pressure, and when described history control mode is the 4th control mode, described control mode be updated to the 3rd control mode;
Be less than the 7th pressure when described current pressure is more than or equal to the 5th pressure, and when described control mode is the 3rd control mode, described control mode still remains the 3rd control mode; Be less than the 7th pressure when described current pressure is more than or equal to the 5th pressure, and described history control mode be the first control mode or the second control mode time, described control mode is updated to the 3rd control mode; The 7th pressure is less than when described current pressure is more than or equal to the 5th pressure, and described history control mode is when being the 4th control mode, continue to judge whether described current pressure is less than or equal to the 6th pressure, if so, then described control mode is updated to the 3rd control mode;
Be less than the 8th pressure when described current pressure is more than or equal to the 7th pressure, and when described control mode is the 4th control mode, described control mode still remains the 4th control mode; Be less than the 8th pressure when described current pressure is more than or equal to the 7th pressure, and described history control mode be the first control mode or the second control mode or the 3rd control mode time, described control mode is updated to the 4th control mode;
Step 6: repeated execution of steps three to step 6.
After control mode is determined, in conjunction with described air-conditioning demand signal, the speed of a motor vehicle and temperature, described electrical cooling fan high speed operation, low cruise or out of service to be controlled.Concrete controlling method comprises and described first control mode, the second control mode, the 3rd control mode and the 4th control mode the first controlling method, the second controlling method, the 3rd controlling method and the 4th controlling method one to one.
Particularly, be described in detail in conjunction with following table:
This table is the control logic table of electrical cooling fan, and in table, white space represents, is not that low cruise neither high speed operation but out of service at those regional Electronic cooling fans.Dotted line represents that electrical cooling fan is transferred by the saltus step of low-speed operation mode to high speed operation mode, or is transferred by the saltus step of high speed operation mode to low-speed operation mode.Be described in detail as follows:
Described first controlling method is: send when there being described air-conditioning demand signal, and described control mode is the first control mode, and described temperature is when being greater than the 4th temperature, no matter current vehicle speed how, all control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 5th temperature, then control described electrical cooling fan out of service.
Described second controlling method comprises:
First: when there being described air-conditioning demand signal to send, and described control mode is the second control mode, and when the described speed of a motor vehicle is less than first speed of a motor vehicle, continue to judge the temperature of described automobile engine cooling liquid:
When described temperature be greater than the first temperature be less than or equal to the 3rd temperature time, control described electrical cooling fan low cruise, until when the temperature of current automobile engine cooling liquid is less than or equal to the 8th temperature, then control described electrical cooling fan out of service;
When described temperature is greater than the 3rd temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 6th temperature, then control described electrical cooling fan low cruise.
Second: when there being described air-conditioning demand signal to send, and described control mode is the second control mode, and the described speed of a motor vehicle is more than or equal to first speed of a motor vehicle when being less than second speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature be greater than the second temperature be less than or equal to the 3rd temperature time, control described electrical cooling fan low cruise, until when the temperature of current automobile engine cooling liquid is less than or equal to the 7th temperature, then control described electrical cooling fan out of service;
When described temperature is greater than the 3rd temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 6th temperature, then control described electrical cooling fan low cruise.
3rd: when there being described air-conditioning demand signal to send, and described control mode is the second control mode, and when the described speed of a motor vehicle is more than or equal to second speed of a motor vehicle, continue to judge the temperature of described automobile engine cooling liquid:
When described temperature is greater than the 4th temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 5th temperature, then control described electrical cooling fan out of service.
Described 3rd controlling method comprises:
First: when there being described air-conditioning demand signal to send, and described control mode is the 3rd control mode, and when the described speed of a motor vehicle is less than first speed of a motor vehicle, continue to judge the temperature of described automobile engine cooling liquid:
When described temperature is less than or equal to the second temperature, control described electrical cooling fan low cruise;
When described temperature is greater than the second temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 7th temperature, then control described electrical cooling fan low cruise.
Second: when there being described air-conditioning demand signal to send, and described control mode is the 3rd control mode, and the described speed of a motor vehicle is more than or equal to first speed of a motor vehicle when being less than second speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature be greater than the second temperature be less than or equal to the 3rd temperature time, control described electrical cooling fan low cruise, until when the temperature of current automobile engine cooling liquid is less than or equal to the 7th temperature, then control described electrical cooling fan out of service;
When described temperature is greater than the 3rd temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 6th temperature, then control described electrical cooling fan low cruise.
3rd: when there being described air-conditioning demand signal to send, and described control mode is the 3rd control mode, and when the described speed of a motor vehicle is more than or equal to second speed of a motor vehicle, continue to judge the temperature of described automobile engine cooling liquid:
When described temperature is greater than the 4th temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 5th temperature, then control described electrical cooling fan out of service.
Described 4th controlling method is: when there being described air-conditioning demand signal to send, and when described control mode is the 4th control mode, and no matter current vehicle speed how, all controls described electrical cooling fan high speed operation.
Especially, in above-mentioned controlling method, control described electrical cooling fan low cruise, preferably refer to and drive described electrical cooling fan low cruise with the driving voltage of 7V; Control described electrical cooling fan high speed operation, preferably refer to and drive described electrical cooling fan high speed operation with the driving voltage of 13.5V.
Fig. 5 shows the functional-block diagram of the control system of automotive electronics cooling fan of the present invention, and as shown in Figure 5, described automotive electronics cooling fan control system comprises pressure transducer 6, vehicle speed sensor 7, temperature transducer 3 and engine control module 4.
Particularly, described pressure transducer 6, for detecting the pressure of the refrigerant line of air-conditioning system.Described vehicle speed sensor 7, for detecting the speed of a motor vehicle of automobile, this vehicle speed sensor 7 is rotary transformer.Described temperature transducer 3, for detecting the temperature of automobile engine cooling liquid.Described engine control module 4, for obtaining air-conditioning demand signal (press air-conditioning switch 1, have air-conditioning demand signal to send); For according to described air-conditioning demand signal, pressure, the speed of a motor vehicle and temperature, by the first electrical cooling fan control signal line and the second electrical cooling fan control signal line, control described electrical cooling fan 5 high speed operation, low cruise or out of service.Especially, this engine control module 4 is central processing unit (CPU) (CPU), single-chip microcomputer or flush bonding processor etc.
Structure of the present invention, feature and action effect is described in detail above according to graphic shown embodiment; the foregoing is only preferred embodiment of the present invention; but the present invention does not limit practical range with shown in drawing; every change done according to conception of the present invention; or be revised as the Equivalent embodiments of equivalent variations; do not exceed yet specification with diagram contain spiritual time, all should in protection scope of the present invention.
Claims (12)
1. an automotive electronics cooling fan control method, is characterized in that: described controlling method comprises,
Obtain the temperature of air-conditioning demand signal, the pressure of refrigerant line of air-conditioning system, the speed of a motor vehicle of automobile and automobile engine cooling liquid;
According to described air-conditioning demand signal, pressure, the speed of a motor vehicle and temperature, control described electrical cooling fan high speed operation, low cruise or out of service; Set in described controlling method,
4 control modes, are respectively: the first control mode, the second control mode, the 3rd control mode and the 4th control mode;
8 compression force reference value, are respectively from low to high: the first pressure, the second pressure, the 3rd pressure, the 4th pressure, the 5th pressure, the 6th pressure, the 7th pressure and the 8th pressure;
2 speed of a motor vehicle reference values, are respectively from low to high: first speed of a motor vehicle and second speed of a motor vehicle; And,
8 temperature reference value, are respectively from low to high: the 8th temperature, the first temperature, the 7th temperature, the second temperature, the 6th temperature, the 3rd temperature, the 5th temperature and the 4th temperature; Further,
The defining method of the control mode in described controlling method comprises,
Step one: initialization, detects the initial pressure of the refrigerant line of described air-conditioning system;
Step 2: according to described initial pressure determination control mode:
If described initial pressure is greater than the first pressure and is less than the 3rd pressure, then described control mode is the first control mode; If described initial pressure is more than or equal to the 3rd pressure and is less than the 5th pressure, then described control mode is the second control mode; If described initial pressure is more than or equal to the 5th pressure and is less than the 7th pressure, then described control mode is the 3rd control mode; If described initial pressure is more than or equal to the 7th pressure and is less than the 8th pressure, then described control mode is the 4th control mode;
Step 3: record current control mode, as history control mode;
Step 4: the current pressure obtaining the refrigerant line of air-conditioning system;
Step 5: upgrade described control mode according to described current pressure and described history control mode:
Be less than the 3rd pressure when described current pressure is greater than the first pressure, and when described history control mode is the second control mode, continues to judge whether described current pressure is less than or equal to the second pressure, if so, then described control mode is updated to the first control mode; Be less than the 3rd pressure when described current pressure is greater than the first pressure, and described history control mode be the 3rd control mode or the 4th control mode time, described control mode is updated to the second control mode;
Be less than the 5th pressure when described current pressure is more than or equal to the 3rd pressure, and when described history control mode is the first control mode, described control mode be updated to the second control mode; The 5th pressure is less than when described current pressure is more than or equal to the 3rd pressure, and described history control mode is when being the 3rd control mode, continue to judge whether described current pressure is less than or equal to the 4th pressure, if so, then described control mode is updated to the second control mode; Be less than the 5th pressure when described current pressure is more than or equal to the 3rd pressure, and when described history control mode is the 4th control mode, described control mode be updated to the 3rd control mode;
Be less than the 7th pressure when described current pressure is more than or equal to the 5th pressure, and described history control mode be the first control mode or the second control mode time, described control mode is updated to the 3rd control mode; The 7th pressure is less than when described current pressure is more than or equal to the 5th pressure, and described history control mode is when being the 4th control mode, continue to judge whether described current pressure is less than or equal to the 6th pressure, if so, then described control mode is updated to the 3rd control mode;
Be less than the 8th pressure when described current pressure is more than or equal to the 7th pressure, and described history control mode be the first control mode or the second control mode or the 3rd control mode time, described control mode is updated to the 4th control mode;
Step 6: repeated execution of steps three to step 6.
2. automotive electronics cooling fan control method according to claim 1, is characterized in that: also comprise in described step 5,
Be less than the 3rd pressure when described current pressure is greater than the first pressure, and when described control mode is the first control mode, described control mode still remains the first control mode;
Be less than the 5th pressure when described current pressure is more than or equal to the 3rd pressure, and when described control mode is the second control mode, described control mode still remains the second control mode;
Be less than the 7th pressure when described current pressure is more than or equal to the 5th pressure, and when described control mode is the 3rd control mode, described control mode still remains the 3rd control mode;
Be less than the 8th pressure when described current pressure is more than or equal to the 7th pressure, and when described control mode is the 4th control mode, described control mode still remains the 4th control mode.
3. automotive electronics cooling fan control method according to claim 2, it is characterized in that: the first controlling method that described controlling method performs after being also included in the defining method of described control mode, the second controlling method, the 3rd controlling method or the 4th controlling method, described first controlling method comprises
Send when there being described air-conditioning demand signal, and described control mode is the first control mode, and described temperature is when being greater than the 4th temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 5th temperature, then control described electrical cooling fan out of service.
4. automotive electronics cooling fan control method according to claim 3, is characterized in that: its second controlling method comprises,
When there being described air-conditioning demand signal to send, and described control mode is the second control mode, and when the described speed of a motor vehicle is less than first speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature be greater than the first temperature be less than or equal to the 3rd temperature time, control described electrical cooling fan low cruise, until when the temperature of current automobile engine cooling liquid is less than or equal to the 8th temperature, then control described electrical cooling fan out of service;
When described temperature is greater than the 3rd temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 6th temperature, then control described electrical cooling fan low cruise.
5. automotive electronics cooling fan control method according to claim 4, is characterized in that: described second controlling method also comprises,
When there being described air-conditioning demand signal to send, and described control mode is the second control mode, and the described speed of a motor vehicle is more than or equal to first speed of a motor vehicle when being less than second speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature be greater than the second temperature be less than or equal to the 3rd temperature time, control described electrical cooling fan low cruise, until when the temperature of current automobile engine cooling liquid is less than or equal to the 7th temperature, then control described electrical cooling fan out of service;
When described temperature is greater than the 3rd temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 6th temperature, then control described electrical cooling fan low cruise.
6. automotive electronics cooling fan control method according to claim 4, is characterized in that: described second controlling method also comprises,
When there being described air-conditioning demand signal to send, and described control mode is the second control mode, and when the described speed of a motor vehicle is more than or equal to second speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature is greater than the 4th temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 5th temperature, then control described electrical cooling fan out of service.
7. automotive electronics cooling fan control method according to claim 3, is characterized in that: its 3rd controlling method comprises,
When there being described air-conditioning demand signal to send, and described control mode is the 3rd control mode, and when the described speed of a motor vehicle is less than first speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature is less than or equal to the second temperature, control described electrical cooling fan low cruise;
When described temperature is greater than the second temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 7th temperature, then control described electrical cooling fan low cruise.
8. automotive electronics cooling fan control method according to claim 7, is characterized in that: described 3rd controlling method also comprises,
When there being described air-conditioning demand signal to send, and described control mode is the 3rd control mode, and the described speed of a motor vehicle is more than or equal to first speed of a motor vehicle when being less than second speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature be greater than the second temperature be less than or equal to the 3rd temperature time, control described electrical cooling fan low cruise, until when the temperature of current automobile engine cooling liquid is less than or equal to the 7th temperature, then control described electrical cooling fan out of service;
When described temperature is greater than the 3rd temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 6th temperature, then control described electrical cooling fan low cruise.
9. automotive electronics cooling fan control method according to claim 7, is characterized in that: described 3rd controlling method also comprises,
When there being described air-conditioning demand signal to send, and described control mode is the 3rd control mode, and when the described speed of a motor vehicle is more than or equal to second speed of a motor vehicle, continues to judge the temperature of described automobile engine cooling liquid:
When described temperature is greater than the 4th temperature, control described electrical cooling fan high speed operation, until when the temperature of current automobile engine cooling liquid is less than or equal to the 5th temperature, then control described electrical cooling fan out of service.
10. automotive electronics cooling fan control method according to claim 3, is characterized in that: its 4th controlling method comprises,
When there being described air-conditioning demand signal to send, and when described control mode is the 4th control mode, control described electrical cooling fan high speed operation.
11. automotive electronics cooling fan control methods as claimed in any of claims 1 to 10, it is characterized in that: described first pressure is 150kPa, described second pressure is 300kPa, described 3rd pressure is 650kPa, described 4th pressure is 1100kPa, described 5th pressure is 1250kPa, and described 6th pressure is 1300kPa, and described 7th pressure is 1600kPa; Described 8th pressure is 3250kPa;
Described first speed of a motor vehicle is 45km/h; Described second speed of a motor vehicle is 80km/h;
Described 8th temperature is 94 DEG C; Described first temperature is 96 DEG C; Described 7th temperature is 98 DEG C; Described second temperature is 100 DEG C; Described 6th temperature is 102 DEG C; Described 3rd temperature is 104 DEG C; Described 5th temperature is 105 DEG C; Described 4th temperature is 109 DEG C.
12. according to claim 4,5, automotive electronics cooling fan control method in 7 or 8 described in any one, is characterized in that: drive described electrical cooling fan low cruise with the driving voltage of 7V, drives described electrical cooling fan high speed operation with the driving voltage of 13.5V.
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| CN103790687B (en) * | 2014-02-13 | 2016-08-31 | 中国第一汽车股份有限公司 | Continuously adjustabe fan control device and control system |
| CN103939377B (en) * | 2014-05-06 | 2016-01-20 | 安徽江淮汽车股份有限公司 | A kind of stepless speed regulation radiator fan controls assembly and method |
| CN104454117A (en) * | 2014-11-27 | 2015-03-25 | 奇瑞商用车（安徽）有限公司 | Automobile engine cooling fan blade rotating speed control system and method |
| CN112248744A (en) * | 2020-09-30 | 2021-01-22 | 广西玉柴机器股份有限公司 | Control system of vehicle air conditioner |
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