CN108583473B - Intelligent hybrid electric vehicle, fan cooling system and method - Google Patents

Intelligent hybrid electric vehicle, fan cooling system and method Download PDF

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CN108583473B
CN108583473B CN201810333211.5A CN201810333211A CN108583473B CN 108583473 B CN108583473 B CN 108583473B CN 201810333211 A CN201810333211 A CN 201810333211A CN 108583473 B CN108583473 B CN 108583473B
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cooling
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CN108583473A (en
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封进
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Guilin University of Aerospace Technology
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Guilin University of Aerospace Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds

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  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The invention relates to an intelligent hybrid electric vehicle, a fan cooling system and a method, wherein the fan cooling system comprises an induction mode judger, a fuzzy controller, a processor and a fan body; the induction mode judger induces the state of the automobile and outputs a closing signal to the processor when the induction mode judger induces that the automobile is in a pure electric mode; when the automobile is sensed to be in a non-pure electric mode, outputting a starting signal to the fuzzy controller; the fuzzy controller detects the rotating speed n of the engine; the actual temperature T of the cooling liquid is also detectedtAcquiring a coolant temperature difference delta T; the fuzzy controller processes the rotating speed n of the engine, the temperature difference delta T of the cooling liquid and the opening signal, generates a processing signal and transmits the processing signal to the processor; the processor processes the processing signal or the closing signal, generates a control signal and transmits the control signal to the fan body, and the fan body controls the running state of the fan body. Compared with the prior art, the hybrid electric vehicle has the advantages that the hybrid electric vehicle can dissipate heat more quickly, and the starting of the vehicle and the improvement of the fuel economy are facilitated.

Description

Intelligent hybrid electric vehicle, fan cooling system and method
Technical Field
The invention relates to the technical field of automobiles, in particular to an intelligent hybrid electric vehicle, a fan cooling system and a fan cooling method.
Background
Two sets of power devices of the hybrid electric vehicle need to be reasonably cooled in the working process to protect the power devices, improve the fuel economy and the emission performance and keep the power system in the optimal working state. Studies have shown that coolant temperatures in excess of 105 c will cause engine damage, and below 45 c the average starting torque of the engine will increase rapidly as the temperature decreases. Too high temperatures of the motor and motor controller will also lead to power reduction, shortened life, and even damage. At the same time, transient cooling will also increase fuel consumption.
Because the temperature control targets of two sets of power devices in the hybrid electric vehicle are different, the conventional scheme is to adopt two sets of independent liquid cooling systems at present, wherein an engine cooling system mainly comprises an engine, a water pump, a thermostat, a radiator and a cooling fan, and a motor cooling system mainly comprises a motor, a motor controller, an electronic water pump, the radiator and the cooling fan. The cooling fan is shared by the two systems, the working state is only determined by the temperature of the cooling liquid, the temperature of the cooling liquid is lower than a threshold value, the cooling fan is not started, and the temperature exceeds the threshold value, so that the cooling fan works. This conventional control scheme for a hybrid vehicle exhibits the following disadvantages: 1) the temperature control precision is poor, and the temperature fluctuation of the cooling liquid is large; 2) the average output torque of the cooling fan is large, and the fuel economy is reduced; 3) when the vehicle is switched to a pure electric working mode, the cooling fan may still work, so that the temperature of an engine cooling system is rapidly reduced, the restarting work of the engine is not facilitated, and meanwhile, the fuel economy is also reduced, especially for a strong-mixing type vehicle.
Disclosure of Invention
The invention aims to provide an intelligent hybrid electric vehicle, a fan cooling system and a method, and aims to solve the technical problems that: the temperature control precision is poor, and the temperature fluctuation of the cooling liquid is large; the average output torque of the cooling fan is large, and the fuel economy is low.
The technical scheme for solving the technical problems is as follows: the fan cooling system comprises an induction mode judger, a fuzzy controller, a processor and a fan body; the induction mode judger, the fuzzy controller, the processor and the fan body are connected in sequence through a circuit; the induction mode judger is also connected with the processor through a line;
the induction mode judger is connected with the automobile; the induction mode judger is used for inducing the state of the automobile and outputting a closing signal to the processor when the induction mode judger induces that the automobile is in a pure electric mode and the speed of the automobile is not zero; when the situation that the automobile is in a non-pure electric mode is sensed, outputting a starting signal to the fuzzy controller;
the fuzzy controller is connected with the engine through a line, and detects the rotating speed n of the engine; the actual temperature T of the coolant flowing through the engine is also detectedtAcquiring a coolant temperature difference Δ T, wherein the coolant temperature difference Δ T is a set temperature TOPTAnd the actual temperature TtI.e. Δ T ═ TOPT-Tt；
The fuzzy controller is used for processing the rotating speed n of the engine, the temperature difference delta T of the cooling liquid and the opening signal, generating a processing signal and transmitting the processing signal to the processor;
the processor processes the processing signal or the closing signal, generates a control signal and transmits the control signal to the fan body, and the fan body controls the running state of the fan body according to the control signal.
Furthermore, the induction mode judger is respectively connected with an accelerator pedal, a brake pedal and an automobile power battery of an automobile through lines; the induction mode judger is used for respectively inducing the vehicle speed, the working state of an accelerator pedal, the working state of a brake pedal and the residual electric quantity of the automobile power battery and respectively and correspondingly generating a vehicle speed signal V and an accelerator pedal working signal thetapBrake pedal operation signal thetabAnd a residual charge signal soc;
the induction mode judger is also used for judging a vehicle speed signal V and an accelerator pedal working signal thetapBrake pedal operation signal thetabProcessing the residual electric quantity signal soc and judging the working state of the automobile; when the hybrid electric vehicle is judged to be in a pure electric mode and the vehicle speed is not zero, outputting a closing signal to the processor; and when the hybrid electric vehicle of the vehicle is judged to be in the non-pure electric mode, outputting a starting signal to the fuzzy controller.
Further, the processor processes the processing signal or the closing signal, and the required torque when the fan body operates is acquired as follows:
Tft＝KtTfmax；
wherein, KtA torque distribution coefficient of the fan body, which represents a weight value to be distributed to the maximum torque of the cooling fan, KtFor the variance, its domain is [0,1 ]]；
TfmaxThe maximum required torque of the fan.
Further, the processor processes the closing signal to obtain a torque distribution coefficient K of the fan bodytGenerating a control signal and transmitting the control signal to a fan body, wherein the fan body acquires T according to the control signalfAnd when t is 0, controlling the fan body to stop running.
Further, the processor processes the processing signal to obtain a fan body torque distribution coefficient KtWherein, 0<KtLess than or equal to 1, generating control signalThe signal is transmitted to the fan body, and the fan body acquires T according to the control signalft>0, controlling the fan body to operate; wherein the actual temperature T of the cooling liquidtAnd the higher the speed n of the engine, KtThe larger the value of (c).
Further, the fuzzy controller normalizes the rotating speed n of the engine, the temperature difference delta T of the cooling liquid and the opening signal, fuzzifies a processing result, performs fuzzy processing according to rules of a fuzzy rule base, defuzzifies a fuzzy processing result and generates a signal containing KtThe processed signal of the value is transmitted to the processor.
The invention has the beneficial effects that: the temperature of the engine coolant of the hybrid electric vehicle is reduced more slowly in the pure electric working mode, and the restarting of the engine and the improvement of the fuel economy are facilitated; the control model is modularized, and a torque distribution coefficient K of the cooling fan is introducedtNot only is the design of the fuzzy controller convenient, but also the transplantation of the model is convenient; and the cooling fan is controlled by adopting fuzzy logic, so that stepless speed change of the cooling fan is realized.
Another technical solution of the present invention for solving the above technical problems is as follows: the intelligent hybrid electric vehicle comprises a motor cooling mechanism, an engine cooling mechanism and a fan cooling system:
when the motor cooling mechanism is arranged at one end of the engine cooling mechanism, which is far away from the vehicle body, the fan cooling system is arranged at one end of the motor cooling mechanism, which is far away from the engine cooling mechanism;
or when the motor cooling mechanism is arranged at the upper end of the engine cooling mechanism, the fan cooling system is arranged at one side of the engine cooling mechanism;
the fan cooling system senses the state of the automobile, when the automobile runs in a pure electric mode, the motor cooling mechanism carries out cooling and heat dissipation, and the fan cooling system stops working; when the automobile runs in an engine mode, the fan cooling system runs to blow air to dissipate heat of the engine cooling mechanism and the motor cooling mechanism.
Further, the motor cooling mechanism comprises a motor radiator and an electronic water pump;
the motor radiator is arranged on one side of the motor controller and one side of the motor, heat generated in the operation process of the motor controller and the motor is conducted to the motor radiator, and the motor radiator radiates heat;
the water inlet end of the electronic water pump is communicated with the water outlet end of the motor radiator through a first pipeline, the water outlet end of the electronic water pump is communicated with the water inlet end of the motor radiator through a second pipeline, and the middle part of the second pipeline surrounds the motor controller and the motor;
the electronic water pump conveys cooling water to the motor radiator through a second pipeline, the cooling water in the second pipeline absorbs heat of the motor controller and the motor and cools the motor, and the cooling water after absorbing heat is conveyed to the motor radiator to dissipate heat; and the motor radiator transmits the cooled cooling water to the electronic water pump.
Further, the engine cooling mechanism comprises an engine radiator, a water pump and a valve;
the engine radiator is arranged on one side of the fan cooling system, the water outlet end of the engine radiator is communicated with the water inlet end of the water pump through a pipeline, the water outlet end of the water pump is communicated with the water inlet end of the engine through a pipeline, and the water outlet end of the engine is communicated with the water inlet end of the engine radiator through a valve;
the engine is internally provided with a heat dissipation channel communicated with a water inlet end and a water outlet end of the engine, heat generated in the operation process of the engine is conducted into cooling water in the heat dissipation channel, the cooling water after heat absorption is conveyed to an engine radiator through the water outlet end of the engine and a valve, the engine radiator carries out heat dissipation and cooling on the cooling water after heat absorption, the cooling water after heat dissipation and cooling is transmitted to a water pump, and the cooling water after heat dissipation and cooling is transmitted to the heat dissipation channel of the engine by the water pump.
The invention has the beneficial effects that: the temperature of the engine coolant of the hybrid electric vehicle is reduced more slowly in the pure electric working mode, and the restarting of the engine and the improvement of the fuel economy are facilitated; the control model is modularized, introduceCooling fan torque distribution coefficient KtNot only is the design of the fuzzy controller convenient, but also the transplantation of the model is convenient; and the cooling fan is controlled by adopting fuzzy logic, so that stepless speed change of the cooling fan is realized.
Another technical solution of the present invention for solving the above technical problems is as follows: a method of cooling a fan comprising the steps of:
the induction mode judger is used for inducing the state of the automobile and outputting a closing signal to the processor when the induction mode judger induces that the automobile is in a pure electric mode and the speed of the automobile is not zero; when the situation that the automobile is in a non-pure electric mode is sensed, outputting a starting signal to the fuzzy controller;
the fuzzy controller detects the rotating speed n of the engine; the actual temperature T of the coolant flowing through the engine is also detectedtAcquiring a coolant temperature difference Δ T, wherein the coolant temperature difference Δ T is a set temperature TOPTAnd the actual temperature TtI.e. Δ T ═ TOPT-Tt(ii) a The rotating speed n of the engine, the coolant temperature difference delta T and the opening signal are processed to generate a processing signal and the processing signal is transmitted to the processor;
the processor processes the processing signal or the closing signal, generates a control signal and transmits the control signal to the fan body, and the fan body controls the running state of the fan body according to the control signal.
The invention has the beneficial effects that: the temperature of the engine coolant of the hybrid electric vehicle is reduced more slowly in the pure electric working mode, and the restarting of the engine and the improvement of the fuel economy are facilitated; the control model is modularized, and a torque distribution coefficient K of the cooling fan is introducedtNot only is the design of the fuzzy controller convenient, but also the transplantation of the model is convenient; and the cooling fan is controlled by adopting fuzzy logic, so that stepless speed change of the cooling fan is realized.
Drawings
FIG. 1 is a block diagram of a fan cooling system of the present invention;
FIG. 2 is a schematic diagram of a temperature difference membership function according to the present invention;
FIG. 3 is a schematic diagram of a membership function of rotational speed and torque coefficients according to the present invention;
fig. 4 is a schematic structural diagram of the intelligent hybrid electric vehicle according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a fan cooling system 101, an induction mode judger 102, a fuzzy controller 103, a processor 104 and a fan body;
2. a motor cooling mechanism 201, a motor radiator 202 and an electronic water pump;
3. engine cooling mechanism 301, engine radiator 302, water pump 303, valve.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1:
as shown in fig. 1 to 3, the fan cooling system includes an induction mode determiner 101, a fuzzy controller 102, a processor 103 and a fan body 104; the induction mode judger 101, the fuzzy controller 102, the processor 103 and the fan body 104 are connected in sequence through a circuit; the sensing mode judger 101 is further connected to the processor 103 through a line;
the induction mode judger 101 is connected with an automobile; the sensing mode judger 101 is configured to sense a state of the vehicle, and output a shutdown signal to the processor 103 when sensing that the vehicle is in a pure electric mode and the vehicle speed is not zero; when the automobile is sensed to be in a non-pure electric mode, outputting a starting signal to the fuzzy controller 102;
the fuzzy controller 102 is connected with the engine through a line, and the fuzzy controller 102 detects the rotating speed n of the engine; the actual temperature T of the coolant flowing through the engine is also detectedtAcquiring a coolant temperature difference Δ T, wherein the coolant temperature difference Δ T is a set temperature TOPTAnd the actual temperature TtI.e. Δ T ═ TOPT-Tt；
The fuzzy controller 102 is used for processing the rotating speed n of the engine, the coolant temperature difference delta T and the opening signal, generating a processing signal and transmitting the processing signal to the processor 103;
the processor 103 processes the processing signal or the closing signal to generate a control signal and transmits the control signal to the fan body 104, and the fan body 104 controls the operation state of the fan body 104 according to the control signal.
In the above embodiment, the sensing mode judger 101 is respectively connected to an accelerator pedal, a brake pedal and a power battery of an automobile through lines; the induction mode judger 101 is used for respectively inducing the vehicle speed, the working state of an accelerator pedal, the working state of a brake pedal and the residual electric quantity of the power battery of the automobile and respectively and correspondingly generating a vehicle speed signal V and an accelerator pedal working signal thetapBrake pedal operation signal thetabAnd a residual charge signal soc;
the sensing mode judger 101 is further configured to determine a vehicle speed signal V and an accelerator pedal operation signal θpBrake pedal operation signal thetabProcessing the residual electric quantity signal soc and judging the working state of the automobile; when the vehicle speed signal V and the residual electric quantity signal soc are not zero, the brake pedal working signal thetabWhen the voltage is zero, judging that the automobile hybrid electric vehicle is in a pure electric mode, and outputting a closing signal to the processor 103; when the vehicle speed signal V or the residual electric quantity signal soc is zero or the brake pedal working signal thetabWhen the signal is not zero, the hybrid electric vehicle is judged to be in a non-pure electric mode, and a starting signal is output to the fuzzy controller 102.
In the above embodiment, the processor 103 processes the processing signal or the closing signal, and obtains the required torque when the fan body 104 operates as follows:
Tft＝KtTfmax；
wherein, KtA torque distribution coefficient of the fan body 104, which represents a weight value to be distributed to the maximum torque of the cooling fan, KtFor the variance, its domain is [0,1 ]]；
TfmaxThe maximum required torque of the fan.
In the above embodiment, the processor 103 processes the shutdown signal to obtain the torque distribution coefficient of the fan body 104KtGenerating a control signal and transmitting the control signal to the fan body 104, wherein the fan body 104 obtains T according to the control signalfWhen t is 0, the fan body 104 is controlled to stop operating.
In the above embodiment, the processor 103 processes the processing signal to obtain the torque distribution coefficient K of the fan body 104tWherein, 0<KtLess than or equal to 1, generating a control signal and transmitting the control signal to the fan body 104, wherein the fan body 104 obtains T according to the control signalft>0, controlling the fan body 104 to operate; wherein the actual temperature T of the cooling liquidtAnd the higher the speed n of the engine, KtThe larger the value of (c).
In the above embodiment, the fuzzy controller 102 normalizes the engine speed n, the coolant temperature difference Δ T, and the start signal, fuzzes the processing result, performs fuzzy processing according to the rules of the fuzzy rule base, defuzzifies the fuzzy processing result, and generates the signal including KtThe processed signal of the value is transmitted to the processor 103;
the method specifically comprises the following steps: the fuzzy controller 102 normalizes the engine speed n, the coolant temperature difference Δ T and the opening signal, and determines the discourse domain of the coolant temperature difference Δ T to be [ -2,2 ] according to the obtained processing result]Speed n of the engine and the fan cooling system torque distribution coefficient KtAll are [0,1 ]](ii) a The rotating speed n of the engine, the temperature difference delta T of the cooling liquid and the torque distribution coefficient K of the fan cooling systemtDividing the fuzzy subsets into 5 fuzzy subsets respectively, and expressing { low, medium, high } by { low, mid low, mid, mid high, high }; the temperature difference delta T of the cooling liquid is processed by adopting a trapezoidal and triangular membership function, the rotating speed n of the engine and the torque distribution coefficient K of the fan cooling systemtThe output comprises a torque distribution coefficient K of the fan cooling systemtTo the processor 103; the triangular membership function and the trapezoidal function have good filtering effect on random noise in the sampling process.
For an intelligent hybrid vehicle, the operating characteristics of the fan cooling system may be described as follows:
(1) the output torque of the fan cooling system 1 must respond to the temperature difference change in time;
(2) it is required that the output torque of the fan cooling system 1 is as small as possible under the condition that the target temperature difference is kept to a minimum;
(3) the rotation speed n of the engine of the intelligent hybrid electric vehicle is increased along with the increase of the vehicle load, so the torque of the fan cooling system 1 can be properly increased before the temperature of the cooling liquid is increased, and the large temperature fluctuation is avoided.
According to the working characteristics of the intelligent hybrid electric vehicle, the following principle is followed when a fuzzy logic control rule is formulated:
(1) when the temperature difference Δ T of the engine coolant is small and the engine speed n is low, the torque distribution coefficient K of the fan body 104 is defined astThe value decreases.
(2) The engine speed n is high and the torque distribution coefficient K of the fan body 104tThe temperature is increased properly, and the temperature is prevented from rising sharply after the power of the engine rises.
(3) When the temperature difference Δ T of the engine coolant is large, the torque distribution coefficient K of the fan body 104 is largetThe value increases.
The rules of the fuzzy rule base adopt IF-THEN rules, and 25 rule bases are established. The rules are shown in table 1:
Figure BDA0001628519440000091
TABLE 1 fuzzy logic control rule Table
Example 2:
as shown in fig. 4, the intelligent hybrid electric vehicle includes a motor cooling mechanism 2, an engine cooling mechanism 3, and the fan cooling system 1:
when the motor cooling mechanism 2 is arranged at one end of the engine cooling mechanism 3 far away from the vehicle body, the fan cooling system 1 is arranged at one end of the motor cooling mechanism 2 far away from the engine cooling mechanism 3;
or when the motor cooling mechanism 2 is arranged at the upper end of the engine cooling mechanism 3, the fan cooling system 1 is arranged at one side of the engine cooling mechanism 3;
the fan cooling system 1 senses the state of the automobile, when the automobile runs in a pure electric mode, the motor cooling mechanism 2 carries out cooling and heat dissipation, and the fan cooling system 1 stops working; when the automobile runs in an engine mode, the fan cooling system 1 runs to blow air to dissipate heat of the engine cooling mechanism 3 and the motor cooling mechanism 2.
In the above embodiment, the motor cooling mechanism 2 includes the motor radiator 201 and the electronic water pump 202;
the motor radiator 201 is arranged on one side of the motor controller and one side of the motor, heat generated in the operation process of the motor controller and the motor is conducted to the motor radiator 201, and the motor radiator 201 radiates heat;
the water inlet end of the electronic water pump 202 is communicated with the water outlet end of the motor radiator 201 through a first pipeline, the water outlet end of the electronic water pump 202 is communicated with the water inlet end of the motor radiator 201 through a second pipeline, and the middle part of the second pipeline surrounds the motor controller and the motor;
the electronic water pump 202 conveys cooling water to the motor radiator 201 through a second pipeline, the cooling water in the second pipeline absorbs heat of the motor controller and the motor and cools the motor, and the cooling water after absorbing heat is conveyed to the motor radiator 201 to dissipate heat; the motor radiator 201 transmits the cooled cooling water to the electronic water pump 202.
In the above embodiment, the engine cooling mechanism 3 includes the engine radiator 301, the water pump 302, and the valve 303;
the engine radiator 301 is arranged at one side of the fan cooling system 1, the water outlet end of the engine radiator 301 is communicated with the water inlet end of the water pump 302 through a pipeline, the water outlet end of the water pump 302 is communicated with the water inlet end of the engine through a pipeline, and the water outlet end of the engine is communicated with the water inlet end of the engine radiator 301 through a valve 303;
the engine is internally provided with a heat dissipation channel communicated with a water inlet end and a water outlet end of the engine, heat generated in the operation process of the engine is conducted into cooling water in the heat dissipation channel, the cooling water after heat absorption is conveyed to an engine radiator 301 through the water outlet end of the engine and a valve 303, the engine radiator 301 conducts heat dissipation and cooling on the cooling water after heat absorption, the cooling water after heat dissipation and cooling is transmitted to a water pump 302, and the water pump 302 transmits the cooling water after heat dissipation and cooling to the engine heat dissipation channel.
Total heat radiation amount of the engine radiator 301 and the motor radiator 201:
Qr＝qePemax+qmPmmax
wherein q ise、qmSpecific heat dissipation, P, recommended for engine and motor respectivelyemaxAnd PmmaxThe maximum power of the engine and the motor respectively.
Heat radiation air volume of the fan cooling system:
Figure BDA0001628519440000111
γαis severe air, CpThe constant-pressure specific heat of the air, and delta t is the temperature difference of the air before and after the radiator.
Determining the maximum required power P of the fan cooling system through the maximum heat dissipation air volume model selection; so as to obtain the maximum required torque of the fan:
Tfmax＝9550×P/n。
example 3:
a method of cooling a fan comprising the steps of:
the sensing mode judger 101 senses the state of the automobile, and outputs a closing signal to the processor 103 when sensing that the automobile is in a pure electric mode and the speed of the automobile is not zero; when the automobile is sensed to be in a non-pure electric mode, outputting a starting signal to the fuzzy controller 102;
the fuzzy controller 102 detects the rotating speed n of the engine; the actual temperature T of the coolant flowing through the engine is also detectedtAcquiring a coolant temperature difference Δ T, wherein the coolant temperature difference Δ T is a set temperature TOPTAnd the actual temperature TtThe difference value of (a) to (b),i.e. Δ T ═ TOPT-Tt(ii) a The rotating speed n of the engine, the coolant temperature difference delta T and the opening signal are processed to generate a processing signal and the processing signal is transmitted to the processor 103;
the processor 103 processes the processing signal or the closing signal to generate a control signal and transmits the control signal to the fan body 104, and the fan body 104 controls the operation state of the fan body 104 according to the control signal.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. The fan cooling system is characterized by comprising an induction mode judger (101), a fuzzy controller (102), a processor (103) and a fan body (104); the induction mode judger (101), the fuzzy controller (102), the processor (103) and the fan body (104) are connected in sequence through a circuit; the induction mode judger (101) is also connected with the processor (103) through a line;
the induction mode judger (101) is connected with an automobile; the induction mode judger (101) is used for inducing the state of the automobile, and outputting a closing signal to the processor (103) when the induction mode judger induces that the automobile is in a pure electric mode and the speed of the automobile is not zero; when the automobile is sensed to be in a non-pure electric mode, outputting a starting signal to the fuzzy controller (102);
the fuzzy controller (102) is connected with an engine through a line, and the fuzzy controller (102) detects the rotating speed n of the engine; the actual temperature T of the coolant flowing through the engine is also detectedtAcquiring a coolant temperature difference Δ T, wherein the coolant temperature difference Δ T is a set temperature TOPTAnd the actual temperature TtI.e. Δ T = TOPT-Tt；
The fuzzy controller (102) is used for processing the rotating speed n of the engine, the coolant temperature difference delta T and the opening signal, generating a processing signal and transmitting the processing signal to the processor (103);
the processor (103) processes the processing signal or the closing signal, generates a control signal and transmits the control signal to the fan body (104), and the fan body (104) controls the running state of the fan body (104) according to the control signal;
the induction mode judger (101) is respectively connected with an accelerator pedal, a brake pedal and an automobile power battery of an automobile through lines; the induction mode judger (101) is used for respectively inducing the vehicle speed, the working state of an accelerator pedal, the working state of a brake pedal and the residual electric quantity of a vehicle power battery and respectively and correspondingly generating a vehicle speed signalVAccelerator pedal operating signalθ p Brake pedal operating signalθ b And a residual charge signal soc;
the induction mode judger (101) is also used for judging a vehicle speed signalVAccelerator pedal operating signalθ p Brake pedal operating signalθ b Processing the residual electric quantity signal soc and judging the working state of the automobile; when the automobile is judged to be in a pure electric mode and the speed of the automobile is not zero, a closing signal is output to the processor (103); and when the automobile is judged to be in the non-pure electric mode, outputting an opening signal to the fuzzy controller (102).
2. The fan cooling system according to claim 1, wherein the processor (103) processes the processing signal or the shutdown signal, and obtains the required torque when the fan body (104) is running as follows:
Tft=KtTfmax；
wherein, KtA torque distribution coefficient for the fan body (104) representing a weight value to be distributed to the maximum torque of the cooling fan, KtFor the variance, its domain is [0,1 ]]；
TfmaxThe maximum required torque of the fan.
3. The fan cooling system of claim 2, wherein the processor is configured to perform the steps of(103) The closing signal is processed to obtain the torque distribution coefficient K of the fan body (104)t=0, generating a control signal and transmitting the control signal to the fan body (104), wherein the fan body (104) acquires T according to the control signalft =0, and the fan body (104) is controlled to stop operating.
4. The fan cooling system according to claim 3, wherein the processor (103) processes the processing signal to obtain a torque distribution coefficient K of the fan body (104)tWherein, 0<KtLess than or equal to 1, generating a control signal and transmitting the control signal to the fan body (104), wherein the fan body (104) acquires T according to the control signalft>0, controlling the fan body (104) to operate; wherein the actual temperature T of the cooling liquidtAnd the higher the speed n of the engine, KtThe larger the value of (c).
5. The fan cooling system according to claim 4, wherein the fuzzy controller (102) normalizes the engine speed n, the coolant temperature difference Δ T, and the opening signal, fuzzes the processing result, performs fuzzy processing according to a rule of a fuzzy rule base, and defuzzifies the fuzzy processing result to generate the signal containing KtThe processed signal of the value is transmitted to the processor (103).
6. Intelligent hybrid vehicle, characterized in that it comprises a motor cooling mechanism (2), an engine cooling mechanism (3) and a fan cooling system (1) according to any one of claims 1 to 5:
when the motor cooling mechanism (2) is arranged at one end of the engine cooling mechanism (3) far away from the vehicle body, the fan cooling system (1) is arranged at one end of the motor cooling mechanism (2) far away from the engine cooling mechanism (3);
or when the motor cooling mechanism (2) is arranged at the upper end of the engine cooling mechanism (3), the fan cooling system (1) is arranged at one side of the engine cooling mechanism (3);
the fan cooling system (1) senses the state of the automobile, when the automobile runs in a pure electric mode, the motor cooling mechanism (2) cools and dissipates heat, and the fan cooling system (1) stops working; when the automobile runs in an engine mode, the fan cooling system (1) runs to blow air to dissipate heat of the engine cooling mechanism (3) and the motor cooling mechanism (2).
7. The intelligent hybrid vehicle according to claim 6, wherein the motor cooling mechanism (2) comprises a motor radiator (201) and an electronic water pump (202);
the motor radiator (201) is arranged on one side of the motor controller and one side of the motor, heat generated in the operation process of the motor controller and the motor is conducted to the motor radiator (201), and the motor radiator (201) radiates heat;
the water inlet end of the electronic water pump (202) is communicated with the water outlet end of the motor radiator (201) through a first pipeline, the water outlet end of the electronic water pump (202) is communicated with the water inlet end of the motor radiator (201) through a second pipeline, and the middle part of the second pipeline surrounds the motor controller and the motor;
the electronic water pump (202) conveys cooling water to the motor radiator (201) through a second pipeline, the cooling water in the second pipeline absorbs heat of the motor controller and the motor and cools the motor, and the cooling water after absorbing heat is conveyed to the motor radiator (201) to dissipate heat; the motor radiator (201) transmits the cooled cooling water to the electronic water pump (202).
8. The intelligent hybrid vehicle according to claim 7, wherein the engine cooling mechanism (3) includes an engine radiator (301), a water pump (302), and a valve (303);
the engine radiator (301) is arranged on one side of the fan cooling system (1), the water outlet end of the engine radiator (301) is communicated with the water inlet end of the water pump (302) through a pipeline, the water outlet end of the water pump (302) is communicated with the water inlet end of the engine through a pipeline, and the water outlet end of the engine is communicated with the water inlet end of the engine radiator (301) through a valve (303);
the engine is internally provided with a heat dissipation channel communicated with a water inlet end and a water outlet end of the engine, heat generated in the operation process of the engine is conducted into cooling water in the heat dissipation channel, the cooling water after heat absorption is conveyed to an engine radiator (301) through the water outlet end of the engine and a valve (303), the engine radiator (301) conducts heat dissipation and cooling on the cooling water after heat absorption, the cooling water after heat dissipation and cooling is transmitted to a water pump (302), and the water pump (302) transmits the cooling water after heat dissipation and cooling to the engine heat dissipation channel.
9. A method of cooling a fan, comprising the steps of:
the sensing mode judger (101) senses the state of the automobile, and outputs a closing signal to the processor (103) when sensing that the automobile is in a pure electric mode and the speed of the automobile is not zero; when the automobile is sensed to be in a non-pure electric mode, outputting a starting signal to a fuzzy controller (102);
a fuzzy controller (102) detects the rotating speed n of the engine; the actual temperature T of the coolant flowing through the engine is also detectedtAcquiring a coolant temperature difference Δ T, wherein the coolant temperature difference Δ T is a set temperature TOPTAnd the actual temperature TtI.e. Δ T = TOPT-Tt(ii) a The rotating speed n of the engine, the coolant temperature difference delta T and the opening signal are processed, and a processing signal is generated and transmitted to the processor (103); the processor (103) processes the processing signal or the closing signal, generates a control signal and transmits the control signal to the fan body (104), and the fan body (104) controls the running state of the fan body (104) according to the control signal;
the induction mode judger (101) is respectively connected with an accelerator pedal, a brake pedal and an automobile power battery of an automobile through lines; the induction mode judger (101) is used for respectively inducing the vehicle speed, the working state of an accelerator pedal and the brake pedalThe working state of the plate and the residual electric quantity of the automobile power battery respectively and correspondingly generate a speed signalVAccelerator pedal operating signalθ p Brake pedal operating signalθ b And a residual charge signal soc;
the induction mode judger (101) is also used for judging a vehicle speed signalVAccelerator pedal operating signalθ p Brake pedal operating signalθ b Processing the residual electric quantity signal soc and judging the working state of the automobile; when the automobile is judged to be in a pure electric mode and the speed of the automobile is not zero, a closing signal is output to the processor (103); and when the automobile is judged to be in the non-pure electric mode, outputting an opening signal to the fuzzy controller (102).
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