CN108518268A - A kind of electric control silicone oil fan control method and controller - Google Patents
A kind of electric control silicone oil fan control method and controller Download PDFInfo
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- CN108518268A CN108518268A CN201810393765.4A CN201810393765A CN108518268A CN 108518268 A CN108518268 A CN 108518268A CN 201810393765 A CN201810393765 A CN 201810393765A CN 108518268 A CN108518268 A CN 108518268A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 229920002545 silicone oil Polymers 0.000 title claims abstract description 26
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000011217 control strategy Methods 0.000 claims description 17
- 239000002826 coolant Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 7
- 241000883990 Flabellum Species 0.000 claims description 5
- 238000004378 air conditioning Methods 0.000 claims description 5
- 230000010354 integration Effects 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 14
- 230000008569 process Effects 0.000 description 6
- 230000009467 reduction Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 206010008190 Cerebrovascular accident Diseases 0.000 description 1
- 241001075561 Fioria Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 208000006011 Stroke Diseases 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 208000004631 alopecia areata Diseases 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229920000260 silastic Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
- F01P7/048—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using electrical drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2050/00—Applications
- F01P2050/22—Motor-cars
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The present invention relates to a kind of electric control silicone oil fans, more particularly, to a kind of electric control silicone oil fan control method and controller.The controller is arranged in enging cabin, circuit board is equipped between upper cover plate and lower cover, the electrical equipment composition control circuit arranged on circuit board, control circuit includes CAN Acquisition Circuits, MCU integrated circuits, power-supplying circuit, pwm control circuit；CAN Acquisition Circuits read the operating parameter in vehicle ECU, are sent to MCU integrated circuits；MCU integrated circuits carry out logic judgment to the operating parameter of acquisition and form fan control signal, are sent to pwm control circuit；The fan control signal received is converted to pwm signal by pwm control circuit, for controlling rotation speed of the fan；Vehicle real time execution dynamic state of parameters by reading acquisition controls the actual speed value of fan.
Description
Technical field
The present invention relates to a kind of electric control silicone oil fans, more particularly, to a kind of electric control silicone oil fan control method and control
Device.
Background technology
In vehicle traveling process, as running environment and operating mode change, the Warm status of engine is also constantly changing, and is
Ensure normally travel, the Warm status of engine need to be adjusted in real time.Such as torridity summer, when the engine long time is in the slow-speed of revolution, big
When work under load, the temperature of engine is higher, we should actively reduce its temperature at this time；On the contrary in winter, when environment temperature
Spend it is low or run at high speed have powerful head-on wind when, the temperature of engine is relatively low, we should improve its temperature at this time.
It is mainly radiated at present to it using silicon-oil fan to engine radiating in commercial car, silicon-oil fan is to pass through
Silicone oil is medium, and transmitting torque, then driving fan rotates, and silicon-oil fan is divided into automatically controlled and two class of temperature control, with National V emission standard
Appearance, low noise, low emission, fuel-economizing have become the trend of development of automobile industry, traditional temperature control under this trend
Silicon-oil fan is gradually replaced by more advanced electric control silicone oil fan.As its name suggests, temperature control class fan is to utilize sensitivity
The characteristic of metal temperature distortion drives stem movement, to adjusting rotation speed of the fan；Electrical control electric fan is changed using electric signal
Magnetic field intensity, and then stem movement is driven, to adjust rotation speed of the fan.Compared to temperature control silicon-oil fan, electrical control electric fan is starting
Fuel consumption can be reduced in machine cooling system, reduce engine emission and reduces noise, since electrical control electric fan has preferably
The features such as stability, control accuracy is high, is more and more used in current automotive field.
The control strategy of the electrical control electric fan of mainstream can not be carried out according to the variation of vehicle environment and operating condition at present
Automatic to correct, control accuracy is not also high, and for such case, we start with from the characteristic of electrical control electric fan, in conjunction with vehicle reality
Situation develops a control method and controller with advanced intelligent silicon-oil fan.
Invention content
In order to solve the above problem, the present invention provides a kind of control method and controller of electric control silicone oil fan, the controlling party
Method has and can improve silicon-oil fan using the controller according to fan actual speed, the ability of dynamic corrections control parameter
Service life reduces engine consumption.
The technical solution adopted by the present invention is：A kind of electric control silicone oil fan control method, includes the following steps：
A, collection vehicle real time execution parameter is read；
B, electric control silicone oil fan rotating speed is controlled by outer layer control logic and internal layer control logic；Outer layer control logic will be right
The vehicle real time execution parameter read is demarcated, and is found the corresponding rotation speed of the fan requirements of each operating parameter, is then adopted
With maximum value-based algorithm, it is maximized as total rotation speed of the fan requirements, and rotation speed of the fan requirements are passed into internal layer control
Logic；Internal layer control logic is using rotation speed of the fan requirements, the engine speed of vehicle and fan actual speed value as input, together
When according to vehicle operating parameters, the actual speed value of dynamic control fan.
Preferably, in step a, the vehicle real time execution parameter that acquires reading include engine coolant temperature,
Engine Inlet Temperature, retarder switching signal, air-conditioning switch signal, atmospheric pressure, vehicle speed, environment temperature and engine
Rotating speed.
Preferably, carrying out closed loop PID control to the engine coolant temperature：
PID is a kind of linear control strategies, it constitutes control partially according to given value rin (t) and real output value yout (t)
Poor e (t)：
E (t)=rin (t)-yout (t)
The control law of PID：
In formula：Kp is proportionality coefficient, and Ti is integration time constant, and Td is derivative time constant, and e (t) is deviation, U (t)
For output.
Preferably, in step b, the specific method of the dynamic control is：Controller is according to the change of vehicle running environment
Change dynamic control and export PWM value, then fan actual speed is controlled by the variation of PWM value so that fan actual speed is in fan
Rotation speed demand vicinity is run.
Preferably, in step b, in the dynamic control process, ensured using slippage Thermal protection and limit speed protection
The operational safety of fan under limiting condition.
Further, the specific method of the slippage Thermal protection is：When the temperature of engine coolant is more than on preset
Limit value, controller send out a forced signal, it is ensured that fan at full throttle rotates, a large amount of to radiate, to reduce the temperature of fan；
When the temperature of engine coolant is less than lower limit, the signal for sending out the rotation of a minimum speed, control fan idling fortune are forced
It is dynamic, minimum heat is generated, to improve the temperature of fan.
Further, in step b, the specific method of the limit speed protection is：When rotation speed of the fan is more than fan material
When the limiting value born, controller can send out a forced signal, and rotation speed of the fan is made to drop under limiting value, protect plastic fan
Leaf prevents flabellum from damaging.
Preferably, in step b, the specific method of the internal layer control logic is：According to rotation speed of the fan requirements, fan
Actual speed and engine speed export PWM value, to control the rotating speed of fan using PID regulative mode dynamic controls；Its apoplexy
Fan the output that rotation speed demand derives from outer layer control logic, the rotating speed of target that will be adjusted as PID, fan actual speed and hair
Motivation rotating speed is produced from full-vehicle control unit ECU, and wherein rotation speed of the fan requirements are both the output that PID is adjusted, and will also be made
For feedback signal, PID input terminals are fed back to.
Further, the PID regulative modes specific method is：Between rotation speed of the fan requirements and fan actual speed
Difference will adjust continuous reduction by PID, and fan actual speed is finally made to be run near rotation speed of the fan requirements.
A kind of electric control silicone oil fan controller is arranged in enging cabin, including lower cover and lid close on lower cover
Upper cover plate, and the circuit board that is arranged between upper cover plate and lower cover, it is characterised in that：The electrical member arranged on the circuit board
Part composition control circuit, the control circuit include CAN Acquisition Circuits, MCU integrated circuits, power-supplying circuit, PWM control electricity
Road；
The CAN Acquisition Circuits read the operating parameter in vehicle ECU, are sent to MCU integrated circuits；The MCU is integrated
Circuit carries out logic judgment to the operating parameter of acquisition and forms fan control signal, is sent to pwm control circuit；The PWM controls
The fan control signal received is converted to pwm signal by circuit processed, for controlling rotation speed of the fan；The power-supplying circuit is responsible for
It powers to CAN Acquisition Circuits, MCU integrated circuits and pwm control circuit.
Preferably, the control circuit further includes auxiliary circuit, the auxiliary circuit is integrated to CAN Acquisition Circuits, MCU
Circuit and the input signal of pwm control circuit power supply are filtered, and electic protection is carried out to electrical equipment.
The advantageous effect that the present invention obtains is：The electrical control electric fan control logic of current main-stream only has a kind of adjusting strategy, but
The controller can be formulated according to the temperature difference of four seasons environment corresponding adjusts strategy, that is to say, that the present invention have four in season
Save variation different adjustment strategy, adjusting more precisely, meet current environmental temperature；The electrical control electric fan control of current main-stream is patrolled
It collects and does not take into account that atmospheric pressure, but the controller can formulate corresponding adjusting according to the different of the road conditions and height above sea level that vehicle travels
Strategy makes adjusting be more in line with region；The electrical control electric fan control logic of current main-stream does not take into account that vehicle starts when driving
The rotating speed of machine, but the controller can according to the road conditions that vehicle travels and whether climb and fall formulate it is corresponding adjust tactful, make adjusting
It is more flexible.
It is more accurately controlled under operating mode in conclusion the present invention can be such that silicon-oil fan operates in always, improves silicon-oil fan
Service life；The oil consumption above fan in vehicle processes is reduced, more preferably meets the needs of national energy conservation and emission reduction.
In addition, having benefited from the independent hardware software design and modularization of controller, also have following
Advantageous effect：
The control logic of current main-stream electrical control electric fan is integrated in entire car controller (ECU) or the controller of engine
(MCU) it in, without independent, therefore when vehicle breaks down, needs to spend a large amount of manpower and time, removes dismantling vehicle
And debugging；And the controller because with independent hardware, software, therefore investigate failure when, eliminate the time of dismantling,
Simultaneously as the logic of software is modular, therefore can find failure cause faster, manpower and time cost have been saved.
The control logic of current main-stream electrical control electric fan can not update upgrading, it may be said that after vehicle general assembly, with regard to nothing
Method is done again to be updated, but the control logic of the invention can according to terminal client and vehicle factor demand, update at any time control algolithm or
Person's edition upgrading, and write with a brush dipped in Chinese ink and can be carried out by external equipment directly in control box, there is very strong timeliness and editable
Property.
The vehicle of early stage production because the controller (MCU) of entire car controller (ECU) or engine interface by
Occupy and finish, not extra port integrates the control logic of electrical control electric fan, therefore can not update, using automatically controlled silicon
Alopecia areata is fanned.If, can be outside above-mentioned interface using the present invention, external control logic so that early stage vehicle can also be realized automatically controlled
Fan control, instead of early stage fan before.
Description of the drawings
Fig. 1 is the structural schematic diagram of controller of the present invention；
Fig. 2 is the upward view of Fig. 1；
Fig. 3 is the right view of Fig. 1；
Fig. 4 is the hardware circuit of the controller of the present invention；
Fig. 5 is the control logic figure of the controller of the present invention；
Fig. 6 is the outer layer control logic figure of the controller of the present invention；
Fig. 7 is the internal layer control logic figure of the controller of the present invention.
Specific implementation mode
The present invention is further described in the following with reference to the drawings and specific embodiments.
As shown in Figs. 1-3, a kind of electric control silicone oil fan controller of the invention, the controller are placed in enging cabin,
The rotating speed of silicon-oil fan is adjusted for intelligence.The controller agent structure includes that lower cover 1 and lid close the upper cover on lower cover 1
Plate 2, lower cover 1 and upper cover plate 2 constitute the outer housing of controller, are installed in the inner space between lower cover 1 and upper cover plate 2
There is circuit board, minor flaps are equipped in 11 bottom of plug receptacle of 1 side of lower cover.Four feet of lower cover 1 and upper cover plate 2 pass through screw
It is fixed together, sealing ring is equipped at the faying face of lower cover 1 and upper cover plate 2.
In the present embodiment, upper cover plate 2, lower cover 1 and minor flaps are all made of high temperature resistant, acid and alkali-resistance high-strength nylon material system
At, with ensure product will not it is cracking because of the hot environment in enging cabin body, deformation etc. failure modes.2 He of upper cover plate
1 faying face of lower cover is sealed using sealing ring, and sealing ring is molded using acid and alkali-resistance and the silastic material in superageing period
It forms, minor flaps cover the gap of controller plug receptacle part, surrounding gluing ensures waterproof requirement, common guarantee control
The leakproofness of device entirety.
Carrier of the circuit board as arrangement electrical equipment, is made using the base material of heat safe material FR4.Circuit board
Electrical equipment is placed using using pcb board mount technology, the electrical equipments such as Chip-R, capacitance are actually subjected to according to circuit design
It asks and is arranged, constitute hardware circuit part, the i.e. control circuit of the controller.
In conjunction with shown in Fig. 4, control circuit include CAN Acquisition Circuits 31, MCU integrated circuits 32, power-supplying circuit 33,
Pwm control circuit 34 and auxiliary circuit 35, CAN Acquisition Circuits 31 use vehicle CAN network agreement SAE J1939 from full-vehicle control
The operating parameter in vehicle ECU is read in unit, is sent to MCU integrated circuits 32；MCU integrated circuits 32 join the operation of acquisition
Number carries out logic judgment and forms fan control signal, is sent to pwm control circuit 34；The fan that pwm control circuit 34 will receive
Control signal is converted to pwm signal, for controlling rotation speed of the fan；Power-supplying circuit 33 is responsible for CAN Acquisition Circuits 31, MCU
Integrated circuit 32 and pwm control circuit power supply 34, auxiliary circuit 35 controls CAN Acquisition Circuits 31, MCU integrated circuits 32 and PWM
The input signal of circuit power supply 34 processed is filtered, and electic protection is carried out to electrical equipment.
As shown in figure 5, a kind of electric control silicone oil fan control method of the present invention, includes the following steps：
A, collection vehicle real time execution parameter is read：
CAN Acquisition Circuits 31 are connected by the CAN network with vehicle, using vehicle CAN network agreement SAE J1939 from whole
Vehicle operating parameters are read in vehicle ECU (control unit)；The vehicle real time execution parameter that acquisition is read includes engine coolant
Temperature, Engine Inlet Temperature, retarder switching signal, air-conditioning switch signal, atmospheric pressure, vehicle speed, environment temperature and
Engine speed, wherein：
Coolant temperature indicates that controller need to acquire the real time temperature of the coolant liquid in engine；
Engine Inlet Temperature indicates that controller need to acquire the temperature of charge air cooler gas outlet；
Retarder switching signal indicates that controller needs to acquire the digital signal whether retarder is opened；
Air-conditioning switch signal indicates that controller needs to acquire the digital signal whether air-conditioning (HVAC) starts to open at；
Atmospheric pressure indicates that controller needs atmospheric pressure environment in collection vehicle driving process, which is used for characterizing vehicle
Travel the air pressure in Different Altitude；
Vehicle speed indicates that controller needs the real time running speed of collection vehicle；
Environment temperature indicates that controller needs in collection vehicle driving process, the environment temperature at grid；
Engine speed indicates that controller needs to read in driving process, the real-time rotating speed of engine.
B, electric control silicone oil fan rotating speed is controlled by outer layer control logic and internal layer control logic：
The vehicle real time execution parameter that acquisition is read in step a is sent in MCU integrated circuits 32, MCU integrated circuits 32
It will be handled according to control strategy and algorithm, and pwm control circuit 34 can be transmitted signals to, be converted into pwm signal, then
Silicon-oil fan is passed to, to drive fan to rotate, control strategy and algorithm are divided into outer layer control logic and internal layer control is patrolled
Volume.
Outer layer control logic need operating parameter include：Vehicle operation environment temperature, coolant temperature, charge air cooler into
Temperature degree, vehicle atmospheric pressure, vehicle speed, retarder on off state, air-conditioner switch state, as shown in fig. 6, will be to reading
Above-mentioned vehicle real time execution parameter demarcated, find the corresponding rotation speed of the fan requirements of each operating parameter, then use
Maximum value-based algorithm is maximized as total rotation speed of the fan requirements, and rotation speed of the fan requirements are passed to internal layer control and are patrolled
Volume.
In outer layer control logic, closed loop PID control has been carried out to coolant temperature：
PID is a kind of linear control strategies, it constitutes control partially according to given value rin (t) and real output value yout (t)
Poor e (t)：
E (t)=rin (t)-yout (t) (1)
The control law of PID：
In formula：Kp is proportionality coefficient, and Ti is integration time constant, and Td is derivative time constant, and e (t) is that deviation (is also named
The input of control), U (t) is output, and the purpose that PID is adjusted is exactly continuous reduction control deviation, finally real output value is made to lean on
Nearly given value.
Internal layer control logic is using rotation speed of the fan requirements, the engine speed of vehicle and fan actual speed value as defeated
Enter, while according to vehicle operating parameters, the actual speed value of dynamic control fan.The operating parameter packet of internal layer control logic demand
It includes：Engine speed.As shown in fig. 7, passing through real-time comparison engine rotating speed and the speed ratio (ratio of rotation speed of the fan and engine speed
Value) product value and the rotation speed of the fan requirements that confirm of outer layer control strategy, and above-mentioned smaller value between the two is taken to believe as input
Number；By slippage Thermal protection and limit speed protection mechanism, different PWM values is exported to control rotation speed of the fan；By to fan
The closed loop feedback PID control of actual speed, makes rotation speed of the fan be moved near demand rotating speed.
It is defeated using PID regulative mode dynamic controls according to rotation speed of the fan requirements, fan actual speed and engine speed
Go out PWM value, to control the rotating speed of fan；Wherein rotation speed of the fan requirements derive from the output of outer layer control logic, will be used as PID
The rotating speed of target of adjusting, fan actual speed and engine speed are produced from full-vehicle control unit ECU, wherein rotation speed of the fan
Requirements are both the output that PID is adjusted, and will also be used as feedback signal, and feed back to PID input terminals.
Difference between rotation speed of the fan requirements and fan actual speed will adjust continuous reduction by PID, finally so that wind
Fan actual speed moves near rotation speed of the fan requirements.Ratio (P) coefficient, differential (I) coefficient and integral in PID adjustings
(D) coefficient can be demarcated by vehicle and be obtained, while the above-mentioned coefficient of difference according to engine speed also will be different.Pass through difference
The different parameters such as environment temperature, different demands rotating speed, fan actual speed, the engine speed in season calibrate in PID adjustings
Each coefficient of ratio, differential, integral adjustment formulates basic PWM tables；PWM tables are compensated by formulation, are compensated to basic PWM tables
Supplement, more accurately calibrate, when different external conditions, the nuance of each coefficient during PID is adjusted.
Basic+the P*KP+I*KI+D*KD (3) of PWM=PWM
In formula：PWM is the PWM value of reality output, and PWM is essentially the corresponding PWM value of basic PWM tables, and P, I, D are basic
Coefficient of correspondence at PWM table calibration, KP, KI, KD are the coefficient of correspondence compensated at PWM table calibration.
During the actual speed value of internal layer control logic dynamic control fan, using slippage Thermal protection and limit speed
Protection ensures the operational safety of fan under limiting condition.
The specific method of slippage Thermal protection is：When the temperature of engine coolant is more than preset upper limit value (generally 89
DEG C~95 DEG C), controller sends out a forced signal, it is ensured that fan at full throttle rotates, a large amount of to radiate, to reduce fan
Temperature；When the temperature of engine coolant than engine less than lower limit (just opening 2 DEG C high), pressure sends out a minimum speed rotation
The signal turned, control fan idling movement, generates minimum heat, to improve the temperature of fan.
Limit speed protection specific method be：When rotation speed of the fan is more than the limiting value that fan material is born, controller
A forced signal can be sent out, rotation speed of the fan is made to drop under limiting value, plastics flabellum is protected, prevents flabellum from damaging.
By way of vehicle calibration, following relevant control strategy can be provided：
The four seasons different control strategy：Controller can demarcate difference according to spring, summer, autumn, the four seasons in winter varying environment temperature
Speed demand table, the control strategy in corresponding season is automatically selected when vehicle is run.
The different control strategy of height above sea level：Controller can demarcate different speed demands according to Different Altitude and atmospheric pressure
Table can select corresponding control strategy when vehicle is in mountain area according to height above sea level.
The different control strategy of travel condition of vehicle：Controller can switch shape according to different vehicle travel speeds, retarder
State, air-conditioner switch state demarcate different speed demand tables, and control strategy is selected according to whole vehicle state when vehicle is run.
The control strategy of climb and fall：When controller can be according to climb and fall, the difference of engine speed demarcates different turn
Fast demand schedule, so as to according to the climb and fall state of vehicle, to select control strategy.
In conclusion controller and control method in the invention compare current control strategy, have more accuracy,
Diversity, while fan can be made to operate in always more accurately according to fan actual speed, the ability of dynamic corrections control parameter
It controls under operating mode, improves the service life of silicon-oil fan, reduce oil consumption；The invention is independent and full-vehicle control unit, use are independent
Hardware ＆ software system, it is more convenient when updating control algolithm, edition upgrading or trouble shoot.
The basic principle and key structural feature of the present invention has been shown and described above.The present invention is not limited by examples detailed above
System, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It both falls in the range of claimed invention.The claimed scope of the invention is by appended claims and its equivalent
It defines.
Claims (10)
1. a kind of electric control silicone oil fan control method, includes the following steps：
A, collection vehicle real time execution parameter is read；
B, electric control silicone oil fan rotating speed is controlled by outer layer control logic and internal layer control logic；Outer layer control logic will be to reading
To vehicle real time execution parameter demarcated, find the corresponding rotation speed of the fan requirements of each operating parameter, then use most
Big value-based algorithm is maximized as total rotation speed of the fan requirements, and rotation speed of the fan requirements are passed to internal layer control logic；
Internal layer control logic is using rotation speed of the fan requirements, the engine speed of vehicle and fan actual speed value as input, while root
According to vehicle operating parameters, the actual speed value of dynamic control fan.
2. electric control silicone oil fan control method according to claim 1, it is characterised in that：In step a, the institute of acquisition is read
It includes engine coolant temperature, Engine Inlet Temperature, retarder switching signal, air-conditioning switch to state vehicle real time execution parameter
Signal, atmospheric pressure, vehicle speed, environment temperature and engine speed.
3. electric control silicone oil fan control method according to claim 2, it is characterised in that：To the engine coolant temperature
Degree carries out closed loop PID control：
PID is a kind of linear control strategies, it constitutes control deviation e according to given value rin (t) and real output value yout (t)
(t)：
E (t)=rin (t)-yout (t)
The control law of PID：
In formula：Kp is proportionality coefficient, and Ti is integration time constant, and Td is derivative time constant, and e (t) is deviation, and U (t) is defeated
Go out.
4. electric control silicone oil fan control method according to claim 1 or 2 or 3, it is characterised in that：It is described dynamic in step b
State control specific method be：Controller exports PWM value according to the variation dynamic control of vehicle running environment, then passes through PWM value
Variation control fan actual speed so that fan actual speed rotation speed of the fan requirements vicinity run.
5. electric control silicone oil fan control method according to claim 1 or 2 or 3, it is characterised in that：It is described dynamic in step b
During state control, ensure the operational safety of fan under limiting condition using slippage Thermal protection and limit speed protection.
6. electric control silicone oil fan control method according to claim 5, it is characterised in that：The slippage Thermal protection it is specific
Method is：When the temperature of engine coolant is more than preset upper limit value, controller sends out a forced signal, it is ensured that fan with
Maximum speed rotates, a large amount of to radiate, to reduce the temperature of fan；When the temperature of engine coolant is less than lower limiting value, controller
It forces to send out the signal that a minimum speed rotates, control fan idling movement generates minimum heat, to improve the temperature of fan
Degree.
7. electric control silicone oil fan control method according to claim 6, it is characterised in that：In step b, the limit speed
The specific method of protection is：When rotation speed of the fan is more than the limiting value that fan material is born, controller can send out one and force letter
Number, so that rotation speed of the fan is dropped under limiting value, protects plastics flabellum, prevent flabellum from damaging.
8. electric control silicone oil fan control method according to claim 1, it is characterised in that：In step b, the internal layer control
The specific method of logic is：According to rotation speed of the fan requirements, fan actual speed and engine speed, using PID regulative modes
Dynamic control exports PWM value, to control the rotating speed of fan；Wherein rotation speed of the fan requirements are from the defeated of outer layer control logic
Going out, the rotating speed of target that will be adjusted as PID, fan actual speed and engine speed are produced from full-vehicle control unit ECU,
Wherein rotation speed of the fan requirements are both the output that PID is adjusted, and will also be used as feedback signal, and feed back to PID input terminals.
9. a kind of electric control silicone oil fan controller is arranged in enging cabin, including lower cover (1) and lid are closed in lower cover (1)
On upper cover plate (2), and circuit board between upper cover plate (2) and lower cover (1) is set, it is characterised in that：The circuit board
The electrical equipment composition control circuit of upper arrangement, the control circuit include CAN Acquisition Circuits (31), MCU integrated circuits (32),
Power-supplying circuit (33), pwm control circuit (34)；
The CAN Acquisition Circuits (31) read the operating parameter in vehicle ECU, are sent to MCU integrated circuits (32)；The MCU
Integrated circuit (32) carries out logic judgment to the operating parameter of acquisition and forms fan control signal, is sent to pwm control circuit
(34)；The fan control signal received is converted to pwm signal by the pwm control circuit (34), for controlling rotation speed of the fan；Institute
Power-supplying circuit (33) is stated to be responsible for powering to CAN Acquisition Circuits (31), MCU integrated circuits (32) and pwm control circuit (34).
10. electric control silicone oil fan controller according to claim 1, it is characterised in that：The control circuit further includes auxiliary
Circuit (35) is helped, the auxiliary circuit (35) is to CAN Acquisition Circuits (31), MCU integrated circuits (32) and pwm control circuit (34)
The input signal of power supply is filtered, and electic protection is carried out to electrical equipment.
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| CN109779736A (en) * | 2019-03-20 | 2019-05-21 | 山东交通学院 | A kind of energy-conserving and optimizing control method and system of engine electric-controlled silicon-oil fan |
| CN110685788A (en) * | 2019-09-26 | 2020-01-14 | 中国重汽集团济南动力有限公司 | Electric control water pump control device and method for diesel engine |
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| CN112523857A (en) * | 2020-11-30 | 2021-03-19 | 中国第一汽车股份有限公司 | Control method, device, storage medium and system of electric control silicone oil mechanical fan |
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| CN114810316A (en) * | 2021-07-01 | 2022-07-29 | 长城汽车股份有限公司 | Method and device for overall vehicle thermal management control, controller and vehicle |
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| CN114607500A (en) * | 2022-03-16 | 2022-06-10 | 玉柴联合动力股份有限公司 | Control method for correcting electric control silicone oil fan of natural gas engine |
| CN114562359B (en) * | 2022-03-24 | 2023-01-20 | 湖南道依茨动力有限公司 | Fan control method and device, readable storage medium and engineering equipment |
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| CN114810857A (en) * | 2022-06-28 | 2022-07-29 | 潍柴动力股份有限公司 | Method and system for controlling separation time of electric control silicone oil fan |
| CN114810857B (en) * | 2022-06-28 | 2022-10-18 | 潍柴动力股份有限公司 | Method and system for controlling separation time of electric control silicone oil fan |
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Address after: 430056 Maple Five Road, Wuhan Economic and Technological Development Zone, Wuhan City, Hubei Province Applicant after: Dongfeng Malerje Systems Co., Ltd. Address before: 430056 Maple Five Road, Wuhan Economic and Technological Development Zone, Wuhan City, Hubei Province Applicant before: Dongfeng Behr Thermal Systems Co., Ltd. |