CN107472001B - Control method, device and the vehicle of cooling water pump - Google Patents
Control method, device and the vehicle of cooling water pump Download PDFInfo
- Publication number
- CN107472001B CN107472001B CN201611124414.0A CN201611124414A CN107472001B CN 107472001 B CN107472001 B CN 107472001B CN 201611124414 A CN201611124414 A CN 201611124414A CN 107472001 B CN107472001 B CN 107472001B
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- Prior art keywords
- temperature
- fuzzy
- water pump
- cooling water
- revolving speed
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Classifications
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- 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
-
- 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
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
Abstract
The invention discloses a kind of control method of cooling water pump, control system and vehicles, wherein method is the following steps are included: acquisition driving motor temperature, the coolant temperature of electric machine controller temperature and driving motor water inlet；The temperature difference and difference variation rate between peak and target temperature are obtained according to peak and target temperature in driving motor temperature, electric machine controller temperature and coolant temperature；According to the revolving speed of the temperature difference and difference variation rate control cooling water pump between preset fuzzy control rule and peak and target temperature.This method can adjust the revolving speed of cooling water pump in real time, energy saving to reach energy-efficient purpose, guarantee the course continuation mileage of vehicle, and the accuracy of control can be improved, improve the reliability of vehicle.
Description
Technical field
The present invention relates to automobile technical field, in particular to a kind of control method of cooling water pump, device and vehicle.
Background technique
Currently, the cooling system of automobile is for cooling down to the driving motor and electric machine controller of electric car, wherein
The water flow of cooling water in cooling system can be adjusted by the duty ratio of cooling water pump.
However, the control system of cooling water pump mostly uses single point temperature to acquire, one is such as only arranged in electric machine controller
Temperature sensor so that entire car controller reads single-point water temperature transducing signal, and carries out logic judgment to this signal, to export control
Signal processed realizes the purpose of the duty ratio or switch that adjust cooling water pump, and this reduces the accuracy of control, reduce vehicle
Reliability.
It in addition, normally open control mode after high pressure is usually taken in water pump, and is constant rotational speed control, so that cooling
The water flow of water is fixed, although realizing that simply power consumption is big, and can not be according to the temperature and temperature rise of electric system
Speed adjust cooling water flow, waste of energy reduce the course continuation mileage of vehicle, are unable to satisfy power conservation requirement.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, this method can save energy an object of the present invention is to provide a kind of control method of cooling water pump
Source, guarantees the course continuation mileage of vehicle, and improves the accuracy of control.
It is another object of the present invention to the control systems for proposing a kind of cooling water pump.
In order to achieve the above objectives, one aspect of the present invention embodiment proposes a kind of control method of cooling water pump, including with
Lower step: acquisition driving motor temperature, the coolant temperature of electric machine controller temperature and driving motor water inlet；According to described
Peak and target temperature obtain the peak and target in driving motor temperature, electric machine controller temperature and coolant temperature
The temperature difference and difference variation rate between temperature；According between preset fuzzy control rule and the peak and target temperature
The revolving speed of the temperature difference and difference variation rate control cooling water pump.
The control method of the cooling water pump of the embodiment of the present invention passes through driving motor temperature, electric machine controller temperature and cold
But peak and target temperature obtain the temperature difference and difference variation rate between peak and target temperature in liquid temperature, thus to cold
But water pump carries out fuzzy control, realizes the purpose for adjusting the revolving speed of cooling water pump in real time, to reach energy-efficient purpose, saves energy
Source, guarantees the course continuation mileage of vehicle, and the accuracy of control can be improved, and improves the reliability of vehicle.
Further, in one embodiment of the invention, described according to preset fuzzy control rule and the highest
The revolving speed of the temperature difference and difference variation rate control cooling water pump between value and target temperature, further comprises: establishing the temperature difference and be subordinate to
Function and difference variation rate membership function；Respectively according to the temperature difference membership function and the difference variation rate membership function by institute
It states the temperature difference and the difference variation rate is converted into fuzzy value；Determine that the temperature difference and the fuzzy value of the difference variation rate exist respectively
Fuzzy subset belonging in correspondence theory domain space；The fuzzy control rule is established, according to the fuzzy control rule and institute
State the revolving speed that fuzzy subset controls the cooling water pump.
Further, in one embodiment of the invention, described according to the fuzzy control rule and the fuzzy son
Collection controls the revolving speed of the cooling water pump, further comprises: obtaining institute according to the fuzzy control rule and the fuzzy subset
State the revolving speed fuzzy value of cooling water pump；It is weighted and averaged according to the revolving speed fuzzy value and quantizing factor, obtains the cooling
The rotating speed of target of water pump；The revolving speed of the cooling water pump is controlled according to the rotating speed of target.
Further, in one embodiment of the invention, the temperature difference membership function and difference variation rate person in servitude are being established
After membership fuction, further includes: establish revolving speed membership function, with according to the revolving speed membership function, the fuzzy control rule and
The fuzzy subset obtains the revolving speed fuzzy value of the cooling water pump.
Further, in one embodiment of the invention, the fuzzy control rule is established by method of expertise
's.
In order to achieve the above objectives, another aspect of the present invention embodiment proposes a kind of control system of cooling water pump, comprising:
Acquisition module, for acquiring the coolant temperature of driving motor temperature, electric machine controller temperature and driving motor water inlet；It obtains
Modulus block, for according to peak and target temperature in the driving motor temperature, electric machine controller temperature and coolant temperature
Obtain the temperature difference and difference variation rate between the peak and target temperature；Control module, for according to preset Fuzzy Control
The revolving speed of the temperature difference and difference variation rate control cooling water pump between system rule and the peak and target temperature.
The control system of the cooling water pump of the embodiment of the present invention passes through driving motor temperature, electric machine controller temperature and cold
But peak and target temperature obtain the temperature difference and difference variation rate between peak and target temperature in liquid temperature, thus to cold
But water pump carries out fuzzy control, realizes the purpose for adjusting the revolving speed of cooling water pump in real time, to reach energy-efficient purpose, saves energy
Source, guarantees the course continuation mileage of vehicle, and the accuracy of control can be improved, and improves the reliability of vehicle.
Further, in one embodiment of the invention, the control module includes: to establish unit, for establishing temperature
Poor membership function and difference variation rate membership function；Conversion unit, for respectively according to the temperature difference membership function and the temperature
The temperature difference and the difference variation rate are converted fuzzy value by poor change rate membership function；Determination unit, for determining respectively
The fuzzy value of the temperature difference and difference variation rate fuzzy subset affiliated in correspondence theory domain space；Control unit is used for
The fuzzy control rule is established, to control turning for the cooling water pump according to the fuzzy control rule and the fuzzy subset
Speed.
Further, in one embodiment of the invention, described control unit is also used to be advised according to the fuzzy control
The revolving speed fuzzy value of the cooling water pump is then obtained with the fuzzy subset, and according to the revolving speed fuzzy value and quantizing factor
It is weighted and averaged, obtains the rotating speed of target of the cooling water pump, to control the cooling water pump according to the rotating speed of target
Revolving speed.
Further, in one embodiment of the invention, the unit of establishing is also used to establish revolving speed membership function, with
The revolving speed for obtaining the cooling water pump according to the revolving speed membership function, the fuzzy control rule and the fuzzy subset is fuzzy
Value.
In order to achieve the above objectives, further aspect of the present invention embodiment proposes a kind of vehicle comprising above-mentioned cooling water
The control system of pump.The vehicle can by peak in driving motor temperature, electric machine controller temperature and coolant temperature and
Target temperature obtains the temperature difference and difference variation rate between peak and target temperature, to carry out Fuzzy Control to cooling water pump
System realizes the purpose for adjusting the revolving speed of cooling water pump in real time, energy saving to reach energy-efficient purpose, guarantees the continuation of the journey of vehicle
Mileage, and the accuracy of control can be improved, improve the reliability of vehicle.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is the flow chart according to the control method of the cooling water pump of the embodiment of the present invention；
Fig. 2 is the fuzzy control flow chart according to the cooling system of one embodiment of the invention；
Fig. 3 is the structural schematic diagram according to the cooling system of a specific embodiment of the invention；
Fig. 4 is the temperature difference subordinating degree function schematic diagram according to one embodiment of the invention；
Fig. 5 is the difference variation rate subordinating degree function schematic diagram according to one embodiment of the invention；
Fig. 6 is the revolving speed subordinating degree function schematic diagram according to one embodiment of the invention；And
Fig. 7 is the structural schematic diagram according to the control system of the cooling water pump of the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Control method, control system and the vehicle of cooling water pump proposed according to embodiments of the present invention in description below it
Before, the defects of the relevant technologies are briefly described first.
Batteries of electric automobile off-capacity will lead to its course continuation mileage shortening, and the use of the electrical appurtenances of vehicle into
One step reduces the course continuation mileage of electric car.Therefore, electric car proposes requirements at the higher level to the operational efficiency of body accessories.
Wherein, cooling recirculation system be automobile energy consumption important component, while meeting heat dissipation performance, it is necessary to take into account vehicle energy saving with
The requirement of load, to increase automobile course continuation mileage and guarantee vehicle dynamic quality.
Wherein, in the related technology, single point temperature signal can accurately not reflect the true temperature of cooling system for electric vehicle,
There may be unmatched situations for the duty ratio of cooling water pump and the virtual condition of vehicle, while not to vehicle driving motor
Winding, vehicle electric machine controller IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor)
Monitoring temperature is carried out etc. thermally sensitive component, may cause the risk of the element over-temperatures such as motor, controller.
In addition, output power of motor is big when starting accelerates or climbs, temperature rises fastly, to need to increase cooling water
Water flow to carry out rapid cooling to electric system, however when speed drives at a constant speed, motor temperature is stablized, and keeps appropriate cold
But water flow can make motor stabilizing in certain temperature orientation, and in the related technology can not be according to the temperature and temperature of electric system
Rise speed adjust cooling water flow.
The present invention is based on the above problems, and proposes the control method, control system and vehicle of a kind of cooling water pump.
The control method, control system and vehicle of the cooling water pump proposed according to embodiments of the present invention are described with reference to the accompanying drawings
, the control method of the cooling water pump proposed according to embodiments of the present invention is described with reference to the accompanying drawings first.
Fig. 1 is the flow chart of the control method of the cooling water pump of the embodiment of the present invention.
As shown in Figure 1, the control method of the cooling water pump the following steps are included:
In step s101, the cooling of driving motor temperature, electric machine controller temperature and driving motor water inlet is acquired
Liquid temperature.
That is, the embodiment of the present invention can be by acquiring driving motor temperature, motor relative to single point temperature signal
The coolant temperature of controller temperature and driving motor water inlet, so that control is more reasonable, it is more energy saving, herein not
Do concrete restriction.
For example, as shown in Fig. 2, acquisition mode can there are many kinds of, such as the input terminal and temperature of entire car controller
Sensor connection, output end are connect with cooling water pump controller, and the output end of cooling water pump controller is connect with cooling water pump, temperature
Degree sensor can have multiple, and for three, the first temperature sensor is mounted on vehicle driving motor, second temperature sensing
Device is mounted in vehicle drive motor controller, and third temperature sensor is mounted on vehicle driving motor coolant liquid water inlet,
Wherein, three temperature sensors are connect with the input terminal of entire car controller.
It is understood that the first temperature sensor is used to monitor the temperature of vehicle driving motor, second temperature sensor
For monitoring the temperature of the core component IGBT of vehicle drive motor controller, third temperature sensor is for monitoring driving motor
The coolant temperature of coolant liquid water inlet.Therefore, entire car controller can pass through logical operation by temperature signal based on the received,
Corresponding cooling water pump is exported after comprehensive descision with the difference according to thermic load and controls signal, and the control of cooling water pump is believed
Number cooling water pump controller is passed to by LIN line, to automatically control the revolving speed or switch of cooling water pump.
In step s 102, according to peak and mesh in driving motor temperature, electric machine controller temperature and coolant temperature
Mark temperature obtains the temperature difference and difference variation rate between peak and target temperature.
In step s 103, according to the temperature difference and the temperature difference between preset fuzzy control rule and peak and target temperature
The revolving speed of change rate control cooling water pump.
It is understood that entire car controller can realize that the water of coolant liquid is recycled by controlling the revolving speed of cooling water pump
Water flow state, wherein cooling water pump revolving speed is higher, and cooling response is faster.It should be noted that battery capacity limits always
Course continuation mileage, since electric energy is extremely limited, cooling water pump revolving speed is higher, and cooling water pump revolving speed is higher, and power consumption is also higher, reduces continuous
Navigate mileage.Therefore, the method for the embodiment of the present invention must mitigate the power burden of automobile by improving the efficiency of cooling system,
Control electric system temperature simultaneously, according to the temperature difference and difference variation rate of driving motor system observed temperature and set temperature,
And the revolving speed of cooling water pump is adjusted, in real time using FUZZY ALGORITHMS FOR CONTROL to reach energy-efficient purpose.
As shown in figure 3, fuzzy controller can be exported using dual input list.Specifically, above three temperature sensor takes
Maximum value is measurement temperature, measures 2 of the temperature difference e and its difference variation rate ec of temperature and target temperature as fuzzy controller
Input, fuzzy controller generates control amount U according to fuzzy rule, and then exports cooling water pump speed controling signal appropriate, from
And change the flow of cooling water pump, realize the purpose of control driving motor temperature.
Wherein, in one embodiment of the invention, according to preset fuzzy control rule and peak and target temperature
Between the temperature difference and difference variation rate control cooling water pump revolving speed, further comprise: establishing temperature difference membership function and the temperature difference and become
Rate membership function；Respectively converted the temperature difference and difference variation rate to according to temperature difference membership function and difference variation rate membership function
Fuzzy value；The fuzzy value of the temperature difference and difference variation rate fuzzy subset affiliated in correspondence theory domain space is determined respectively；Establish mould
Paste control rule, to control the revolving speed of cooling water pump according to fuzzy control rule and fuzzy subset.
Further, in one embodiment of the invention, temperature difference membership function is being established and difference variation rate is subordinate to letter
After number, further includes: revolving speed membership function is established, to obtain according to revolving speed membership function, fuzzy control rule and fuzzy subset
The revolving speed fuzzy value of cooling water pump.
For example, the input quantity of fuzzy controller is obtained according to this sampled value first, and carries out input quantity processing.
Specifically, when driving the driving motor operating temperature range most of the time at [50 DEG C, 180 DEG C], if 60 DEG C of target temperature, then it is fixed
The basic domain of temperature difference E variable of adopted driving motor temperature is [- 10 DEG C, 120 DEG C]；Define the basic domain of difference variation rate EC be [-
10,10]；The output signal of system is U, and basic domain is [0,6000RPM].
Secondly the variable after quantifying carries out Fuzzy processing, obtains fuzzy quantity.Specifically, temperature difference E, difference variation rate EC are
System input, output control are that its fuzzy subset of U is respectively as follows:
E={ NB (negative big), NM (in negative), NS (is born small), ZE (zero), PS (just small), PM (center), PB (honest) }；
EC={ NB (negative big), NM (in negative), NS (is born small), ZE (zero), PS (just small), PM (center), PB (honest) }；
U={ ZE (zero), PZ (positive zero), PS (just small), PM (center), PB (honest) }.
Further, the domain of fuzzy subset is respectively as follows: X=[- 6,6], Y=[- 6,6], Z=[0,6].Wherein, X is indicated
The domain for the fuzzy subset that temperature difference E is taken；Y indicates the domain for the fuzzy subset that difference variation rate EC is taken；Z indicates system output
The domain for the fuzzy subset that U is taken.Wherein, above-mentioned membership function can use trigonometric function, wherein μ X indicates temperature difference E's
Membership function is as shown in figure 4, μ Y indicates the membership function of difference variation rate EC as shown in figure 5, μ Z indicates control output U, that is, revolving speed
Membership function it is as shown in Figure 6, wherein revolving speed membership function obtaining revolving speed step use.
Further, in one embodiment of the invention, fuzzy control rule is established by method of expertise.
It should be noted that design of Fuzzy Control key is exactly the design of rule base, fuzzy control rule is to be based on
Whether the control experience of operator's long-term accumulation and the related knowledge of expert, fuzzy control rule are established accurate, will be determined
The quality of fuzzy Control performance.Such as fuzzy control rule can be generalized into table 1, such as when electric system maximum temperature is greater than
At 85 DEG C (both the temperature difference was positive), if difference variation rate is positive, illustrate that the temperature difference has the tendency that raising becomes larger, to reduce temperature simultaneously as early as possible
The temperature difference is inhibited to become larger, so output control revolving speed increases.
Table 1
The inquiry table of fuzzy controller can be constituted on the basis of above-mentioned off-line calculation, it can be stored in single-chip microcontroller
In ROM, and work out an inquiry table subprogram.In practical control process, as long as will in each period (using 1s as the period)
Variation ec (k+1)-ec (k) of collected measurement error e (k) (k=0,1 ...) and the error being calculated is respectively multiplied by amount
Change factor K1And K2, subprogram of tabling look-up can be called, the output U of corresponding fuzzy system is found.
Further, in one embodiment of the invention, cooling water is controlled according to fuzzy control rule and fuzzy subset
The revolving speed of pump further comprises: obtaining the revolving speed fuzzy value of cooling water pump according to fuzzy control rule and fuzzy subset；According to turn
Fast fuzzy value and quantizing factor are weighted and averaged, and obtain the rotating speed of target of cooling water pump；Cooling water is controlled according to rotating speed of target
The revolving speed of pump.
Specifically, deblurring can use weighted mean method, multiplied by quantizing factor K after U value deblurring3Up to accurate control
Amount processed exports u, and the output quantity is corresponding with cooling water pump control revolving speed.Wherein, quantizing factor K1、K2Calculation formula be K=domain
Range/basic domain range, such as K1=(6- (- 6))/(95- (- 35))=6/65；K2=(6- (- 6))/(10- (- 10))
=0.6.In addition, K3Reduction formula=basic domain range/domain range, such as K3=1000.
It is understood that non-linear and vulnerable to output power the influence of electric system temperature change, causes often
There is very big difficulty in the control of rule, and fuzzy control does not need to establish the specific mathematical modulo of controlled device on system modelling
Type, it is only necessary to which language establishes the relationship of control input with control output, is converted into Automatic Control Strategy by establishing rule base, controls
Method processed is simple and effective, is very suitable to the automatic control to electromotor cooling system.
The control method of cooling water pump according to an embodiment of the present invention passes through driving motor temperature, electric machine controller temperature
And peak and target temperature obtain the temperature difference and difference variation rate between peak and target temperature in coolant temperature, thus
Fuzzy control is carried out to cooling water pump, realizes the purpose for adjusting the revolving speed of cooling water pump in real time, to reach energy-efficient purpose, is saved
The energy guarantees the course continuation mileage of vehicle, while meeting heat dissipation performance, takes into account the requirement of vehicle energy saving and load, to increase
Add automobile course continuation mileage and guarantee vehicle dynamic quality, and the accuracy of control can be improved, improves the reliability of vehicle, simply
Easily realize.
Referring next to the control system for the cooling water pump that attached drawing description proposes according to embodiments of the present invention.
Fig. 7 is the control system of the cooling water pump of the embodiment of the present invention.
As shown in fig. 7, the control system 10 of the cooling water pump includes: acquisition module 100, obtains module 200 and control mould
Block 300.
Wherein, acquisition module 100 is for acquiring driving motor temperature, electric machine controller temperature and driving motor water inlet
Coolant temperature.Module 200 is obtained to be used for according to highest in driving motor temperature, electric machine controller temperature and coolant temperature
Value and target temperature obtain the temperature difference and difference variation rate between peak and target temperature.Control module 300 is used for according to pre-
If fuzzy control rule and peak and target temperature between the temperature difference and difference variation rate control cooling water pump revolving speed.This
The control system 10 of inventive embodiments can adjust the revolving speed of cooling water pump in real time, energy saving to reach energy-efficient purpose, protect
The course continuation mileage of vehicle is demonstrate,proved, and the accuracy of control can be improved, improves the reliability of vehicle.
Further, in one embodiment of the invention, control module 300 include: establish unit, conversion unit, really
Order member and control unit.
Wherein, unit is established for establishing temperature difference membership function and difference variation rate membership function.Conversion unit is for dividing
Fuzzy value is not converted for the temperature difference and difference variation rate according to temperature difference membership function and difference variation rate membership function.Determination unit
For determining the fuzzy value of the temperature difference and difference variation rate fuzzy subset affiliated in correspondence theory domain space respectively.Control unit is used
In establishing fuzzy control rule, to control the revolving speed of cooling water pump according to fuzzy control rule and fuzzy subset.
Further, in one embodiment of the invention, control unit is also used to according to fuzzy control rule and obscures
Subset obtains the revolving speed fuzzy value of cooling water pump, and is weighted and averaged according to revolving speed fuzzy value and quantizing factor, obtains cold
But the rotating speed of target of water pump, to control the revolving speed of cooling water pump according to rotating speed of target.
Further, in one embodiment of the invention, it establishes unit and is also used to establish revolving speed membership function, with basis
Revolving speed membership function, fuzzy control rule and fuzzy subset obtain the revolving speed fuzzy value of cooling water pump.
It should be noted that the explanation of the aforementioned control method embodiment to cooling water pump is also applied for the embodiment
Cooling water pump control system, details are not described herein again.
The control system of cooling water pump according to an embodiment of the present invention passes through driving motor temperature, electric machine controller temperature
And peak and target temperature obtain the temperature difference and difference variation rate between peak and target temperature in coolant temperature, thus
Fuzzy control is carried out to cooling water pump, realizes the purpose for adjusting the revolving speed of cooling water pump in real time, to reach energy-efficient purpose, is saved
The energy guarantees the course continuation mileage of vehicle, while meeting heat dissipation performance, takes into account the requirement of vehicle energy saving and load, to increase
Add automobile course continuation mileage and guarantee vehicle dynamic quality, and the accuracy of control can be improved, improves the reliability of vehicle, simply
Easily realize.
In addition, the embodiment of the present invention also proposed a kind of vehicle, which includes the control system of above-mentioned cooling water pump.
The vehicle due to being provided with above system, can by driving motor temperature, electric machine controller temperature and coolant temperature most
High level and target temperature obtain the temperature difference and difference variation rate between peak and target temperature, to carry out mould to cooling water pump
The purpose for adjusting the revolving speed of cooling water pump in real time is realized in paste control, energy saving to reach energy-efficient purpose, guarantees vehicle
Course continuation mileage takes into account the requirement of vehicle energy saving and load while meeting heat dissipation performance, thus increase automobile course continuation mileage and
Guarantee vehicle dynamic quality, and the accuracy of control can be improved, improves the reliability of vehicle, it is simple easily to realize.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (6)
1. a kind of control method of cooling water pump, which comprises the following steps:
Acquire driving motor temperature, the coolant temperature of electric machine controller temperature and driving motor water inlet；
It is obtained according to peak and target temperature in the driving motor temperature, electric machine controller temperature and coolant temperature described
The temperature difference and difference variation rate between peak and target temperature；And
According between preset fuzzy control rule and the peak and target temperature the temperature difference and difference variation rate control it is cold
But the revolving speed of water pump, wherein the temperature difference according between preset fuzzy control rule and the peak and target temperature
With the revolving speed of difference variation rate control cooling water pump, further comprises: establishing temperature difference membership function and difference variation rate is subordinate to letter
Number；Respectively according to the temperature difference membership function and the difference variation rate membership function by the temperature difference and the difference variation rate
It is converted into fuzzy value；The fuzzy value of the temperature difference and difference variation rate mould affiliated in correspondence theory domain space is determined respectively
Paste subset；The fuzzy control rule is established, to control the cooling according to the fuzzy control rule and the fuzzy subset
The revolving speed of water pump；Wherein, the revolving speed that the cooling water pump is controlled according to the fuzzy control rule and the fuzzy subset,
Further comprise: the revolving speed fuzzy value of the cooling water pump is obtained according to the fuzzy control rule and the fuzzy subset；Root
It is weighted and averaged according to the revolving speed fuzzy value and quantizing factor, obtains the rotating speed of target of the cooling water pump；According to the mesh
Mark revolving speed controls the revolving speed of the cooling water pump.
2. the control method of cooling water pump according to claim 1, which is characterized in that establishing the temperature difference membership function
After difference variation rate membership function, further includes:
Revolving speed membership function is established, to obtain according to the revolving speed membership function, the fuzzy control rule and the fuzzy subset
To the revolving speed fuzzy value of the cooling water pump.
3. the control method of -2 described in any item cooling water pumps according to claim 1, which is characterized in that the fuzzy control rule
It is then to be established by method of expertise.
4. a kind of control system of cooling water pump characterized by comprising
Acquisition module, for acquiring the coolant liquid temperature of driving motor temperature, electric machine controller temperature and driving motor water inlet
Degree；
Module is obtained, for according to peak and mesh in the driving motor temperature, electric machine controller temperature and coolant temperature
Mark temperature obtains the temperature difference and difference variation rate between the peak and target temperature；And
Control module, for according to the temperature difference and the temperature difference between preset fuzzy control rule and the peak and target temperature
The revolving speed of change rate control cooling water pump, wherein the control module includes:
Unit is established, for establishing temperature difference membership function and difference variation rate membership function；
Conversion unit, for respectively according to the temperature difference membership function and the difference variation rate membership function by the temperature difference and
The difference variation rate is converted into fuzzy value；
Determination unit, the fuzzy value for determining the temperature difference and the difference variation rate respectively are affiliated in correspondence theory domain space
Fuzzy subset；And
Control unit, for establishing the fuzzy control rule, according to the fuzzy control rule and fuzzy subset control
Make the revolving speed of the cooling water pump；Wherein, control unit is stated to be also used to according to the fuzzy control rule and the fuzzy subset
The revolving speed fuzzy value of the cooling water pump is obtained, and is weighted and averaged according to the revolving speed fuzzy value and quantizing factor, is obtained
To the rotating speed of target of the cooling water pump, to control the revolving speed of the cooling water pump according to the rotating speed of target.
5. the control system of cooling water pump according to claim 4, which is characterized in that the unit of establishing is also used to establish
Revolving speed membership function, it is described cold to be obtained according to the revolving speed membership function, the fuzzy control rule and the fuzzy subset
But the revolving speed fuzzy value of water pump.
6. a kind of vehicle characterized by comprising such as the control system of the described in any item cooling water pumps of claim 4-5.
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| CN111376709B (en) * | 2018-12-28 | 2021-11-23 | 长城汽车股份有限公司 | Vehicle heat dissipation control method and system |
| CN111376710B (en) * | 2018-12-28 | 2021-11-26 | 长城汽车股份有限公司 | Vehicle heat dissipation control method and system |
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| CN114576148B (en) * | 2020-11-30 | 2024-01-30 | 华为技术有限公司 | Liquid cooling system, control method and control device applied to liquid cooling system and vehicle |
| CN114810321A (en) * | 2021-06-30 | 2022-07-29 | 长城汽车股份有限公司 | Cooling liquid temperature control method and device of engine with TMM and vehicle |
| CN113844268B (en) * | 2021-11-09 | 2022-06-21 | 珠海英搏尔电气股份有限公司 | Method and device for determining the operating speed of a cooling device of an electric vehicle |
| CN114043841A (en) * | 2021-11-12 | 2022-02-15 | 上汽通用五菱汽车股份有限公司 | Automobile thermal management method and device and computer readable storage medium |
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