CN107725166A - The control method and system of a kind of engine temperature - Google Patents
The control method and system of a kind of engine temperature Download PDFInfo
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- CN107725166A CN107725166A CN201710966186.XA CN201710966186A CN107725166A CN 107725166 A CN107725166 A CN 107725166A CN 201710966186 A CN201710966186 A CN 201710966186A CN 107725166 A CN107725166 A CN 107725166A
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- water temperature
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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
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
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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
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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
- F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
-
- 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)
- Combined Controls Of Internal Combustion Engines (AREA)
- Rotary Pumps (AREA)
Abstract
This application discloses a kind of control method of engine temperature, apparatus and system, method includes：The current working parameter and current water temperature of engine are obtained, cooling-part is comprised at least in the cooling system of the engine：Thermostat；It is determined that the first object water temperature and second target water temperature corresponding with the current working parameter, the first object water temperature is the water temperature that engine required for thermostat standard-sized sheet reaches, and second target water temperature is the water temperature of holding required for the engine；Judge whether the engine opens auxiliary braking；If the engine opens auxiliary braking, the aperture output duty cycle of the thermostat is controlled so that the thermostat is in fully open position；If the engine is not turned on auxiliary braking, based on the first difference between the first object water temperature and the current water temperature, the aperture output duty cycle of the thermostat is controlled so that the second target water temperature described in the current water temperature convergence of the engine.
Description
This application claims Patent Office of the People's Republic of China, Application No. 201610910948.X, invention are submitted on October 19th, 2016
A kind of priority of the Chinese patent application of entitled " control method of engine temperature, apparatus and system ", entire contents
It is hereby incorporated by reference in the application.
Technical field
The application is related to machine control techniques field, the control method and system of more particularly to a kind of engine temperature.
Background technology
With the development of technology, intelligentized cooling system kernel component such as electric-controlled thermostat, electric control pump and automatically controlled
Fan etc. is applied on the engine of the equipment such as vehicle, realizes the energy-saving and emission-reduction of engine.
But there is presently no the control strategy that can be directed to these cooling parts, accurately controls engine temperature, contracts
The short warming up time, realize energy-saving and emission-reduction.
The content of the invention
In view of this, the purpose of the application is to provide the control method and system of a kind of engine temperature, existing to solve
The realization for having the parts that can not be directed in technology in cooling system to be controlled controls the technical problem of engine temperature.
This application provides a kind of control method of engine temperature, including：
The current working parameter and current water temperature of engine are obtained, cooling is comprised at least in the cooling system of the engine
Part：Thermostat；
It is determined that the first object water temperature and second target water temperature corresponding with the current working parameter, the first object
Water temperature is the water temperature that engine required for thermostat standard-sized sheet reaches, and second target water temperature is holding required for the engine
Water temperature；
Judge whether the engine opens auxiliary braking；
If the engine opens auxiliary braking, the aperture output duty cycle of the thermostat is controlled so that the section
Warm device is in fully open position；
If the engine is not turned on auxiliary braking, based between the first object water temperature and the current water temperature
The first difference, control the aperture output duty cycle of the thermostat so that described in the current water temperature convergence of the engine
Two target water temperatures.
The above method, it is preferable that based on the first difference between the first object water temperature and the current water temperature, control
The aperture output duty cycle of the thermostat, including：
Judge whether the current water temperature is less than the first object water temperature；
If the current water temperature is less than the first object water temperature, the aperture output duty cycle of the thermostat is controlled,
So that the first difference between the aperture of the thermostat and the first object water temperature and the current water temperature is corresponding, realize
Second target water temperature described in the current water temperature convergence of the engine；
If the current water temperature is more than or equal to the first object water temperature, controls the aperture of the thermostat to export and account for
Empty ratio so that the thermostat is in fully open position, realizes the second target water temperature described in the current water temperature convergence of the engine.
The above method, it is preferable that it is described to judge whether the engine opens auxiliary braking, including：
Judge the vehicle retarder of engine place equipment is opened or judged to the retarder of the engine whether
Whether open.
The above method, it is preferable that also include cooling-part in the cooling system：Water pump and fan；
Wherein, the aperture output duty cycle of the thermostat is being controlled so that the thermostat is in after fully open position,
Methods described also includes：
Judge whether the current water temperature is more than or equal to default highest water temperature；
If the current water temperature is more than or equal to the highest water temperature, controls the combination of the water pump and fan to keep off and be in
Highest gear；
If the current water temperature is less than the highest water temperature, based on the current water temperature and second target water temperature it
Between the second difference, control the combination gear of the water pump and fan to be in the gear corresponding with second difference.
The above method, it is preferable that based on the second difference between the current water temperature and second target water temperature, control
The water pump is in the gear corresponding with second difference with the combination gear of fan, including：
Judge whether second difference is more than default maximum temperature difference and the duration exceedes default first duration, such as
Fruit is that the combination for controlling the water pump and fan keeps off one gear of increase；
Judge whether second difference is less than default minimum temperature difference and the duration exceedes default second duration, such as
Fruit is to control the combination of the water pump and fan to keep off to reduce a gear.
The above method, preferably：
Combination gear one gear of increase for controlling the water pump and fan, including：
If the gear of the water pump is not in the highest gear of water pump, controlling the gear of the water pump increases a gear
The gear of position and the holding fan is constant, and otherwise, controlling the gear of the fan increases a gear；
The combination gear for controlling the water pump and fan reduces a gear, including：
If the gear of the water pump is not in the minimum gear of water pump, controlling the gear of the water pump reduces a gear
The gear of position and the holding fan is constant, and otherwise, controlling the gear of the fan reduces a gear.
Present invention also provides a kind of control system of engine temperature, comprised at least in the cooling system of the engine
Cooling-part：Thermostat, the system include：
Parameter acquisition interface, it is connected with the engine, for gathering the current working parameter of the engine and working as
Preceding water temperature；
First processor, it is connected with the parameter acquisition interface, it is corresponding with the current working parameter for determining
First object water temperature, the first object water temperature is the water temperature that reaches of engine required for thermostat standard-sized sheet；
Second processor, it is connected with the parameter acquisition interface, it is corresponding with the current working parameter for determining
The second target water temperature, second target water temperature be the engine required for keep water temperature；
First electric control gear, it is connected with the thermostat, for controlling the aperture output duty cycle of the thermostat；
Braking performance test device, it is connected with the engine and first electric control gear, for judging that the engine is
No unlatching auxiliary braking, if the engine opens auxiliary braking, trigger first electric control gear and control the thermostat
Aperture output duty cycle so that the thermostat is in fully open position, if the engine is not turned on auxiliary braking, touch
Send out the first electric control gear described based on the first difference between the first object water temperature and the current water temperature, control the section
The aperture output duty cycle of warm device so that the second target water temperature described in the current water temperature convergence of the engine.
Said system, it is preferable that first electric control gear includes：
First comparator, for judging whether the current water temperature is less than the first object water temperature；
First controller, it is connected with the first comparator, if being less than first mesh for the current water temperature
Water temperature is marked, controls the aperture output duty cycle of the thermostat so that the aperture of the thermostat and the first object water temperature
The first difference between the current water temperature is corresponding, realizes the second target water described in the current water temperature convergence of the engine
Temperature；If the current water temperature is more than or equal to the first object water temperature, the aperture output duty cycle of the thermostat is controlled,
So that the thermostat is in fully open position, the second target water temperature described in the current water temperature convergence of the engine is realized.
Said system, it is preferable that the cooling system also includes cooling-part：Water pump and fan；
Wherein, the cooling system also includes：Second electric control gear, second electric control gear include：
Second comparator, for judging whether the current water temperature is more than or equal to default highest water temperature；
Second controller, if being more than or equal to the highest water temperature for the current water temperature, control the water pump with
The combination gear of fan is in highest gear；If the current water temperature is less than the highest water temperature, based on the current water temperature with
The second difference between second target water temperature, the combination gear of the water pump and fan is controlled to be in and the second difference phase
Corresponding gear.
Said system, it is preferable that the second controller is based between the current water temperature and second target water temperature
The second difference, control the combination gear of the water pump and fan to be in the gear corresponding with second difference, including：
Judge whether second difference is more than default maximum temperature difference and the duration exceedes default first duration, such as
Fruit is that the combination for controlling the water pump and fan keeps off one gear of increase；Judge second difference whether be less than it is default most
The small temperature difference and duration exceedes default second duration, if it is, controlling the combination of the water pump and fan to keep off reduces by one
Gear.
Said system, it is preferable that the second controller controls combination gear one gear of increase of the water pump and fan,
Including：
If the gear of the water pump is not in the highest gear of water pump, controlling the gear of the water pump increases a gear
The gear of position and the holding fan is constant, and otherwise, controlling the gear of the fan increases a gear；
The second controller controls the combination gear of the water pump and fan to reduce a gear, including：
If the gear of the water pump is not in the minimum gear of water pump, controlling the gear of the water pump reduces a gear
The gear of position and the holding fan is constant, and otherwise, controlling the gear of the fan reduces a gear.
From such scheme, a kind of control method for engine temperature that the application provides, apparatus and system, obtaining
After the duty parameter and target water temperature of engine, judged by the size of the current water temperature to engine, to coordinate control section
The operation of warm device, such as judged by whether opening auxiliary braking to engine, so as to which control section is warm in different ways
The aperture output duty cycle of device, to enable the current water temperature of engine to target water temperature convergence, hereby it is achieved that by cold
But in system cooling parts control, to realize the temperature control to engine.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the embodiment of the present application, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present application, for
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these accompanying drawings
His accompanying drawing.
Fig. 1 is the schematic layout pattern of each parts of cooling system in engine；
Fig. 2 is a kind of flow chart of the control method for engine temperature that the embodiment of the present application provides；
Fig. 3 and Fig. 4 is respectively a kind of partial process view of the control method for engine temperature that the embodiment of the present application provides；
Fig. 5 is a kind of structural representation of the control system for engine temperature that the embodiment of the present application provides；
Fig. 6 is a kind of part-structure schematic diagram of the control system for engine temperature that the embodiment of the present application provides；
Fig. 7 is a kind of another structural representation of the control system for engine temperature that the embodiment of the present application provides；
Fig. 8 is a kind of another part structural representation of the control system for engine temperature that the embodiment of the present application provides；
Fig. 9~Figure 11 is respectively that a kind of logic placement of the control system for engine temperature that the embodiment of the present application provides shows
It is intended to.
Embodiment
Fig. 1 show the schematic layout pattern of each parts of cooling system in engine.Engine can be that diesel oil is sent out
Motivation, or petrol engine etc..Parts in cooling system, which comprise at least, to be had：Thermostat, water pump and fan etc..Section
Warm device can be the electric-controlled thermostat of paraffin wax type in the present embodiment, and water pump and fan can be automatically controlled triggering.Thermostat, water
The operation of pump and fan can cool to engine.
The application carries out operation control to realize to each parts in cooling system, even between each parts
Coordination control, to realize the temperature control to engine, can be realized by following scheme：
Fig. 2 show the implementation process figure that a kind of water temperature to engine of the embodiment of the present application offer is controlled, can
To comprise the following steps：
Step 201：Obtain the current working parameter and current water temperature of engine.
Wherein, can include in current working parameter：The current rotating speed of engine, the current output torque of engine and
Current loads rate of engine etc..
Step 202：The current working parameter of acquisition is filtered.
In the present embodiment, by being filtered to data such as current working parameters, with remove impurity in acquisition data
Or clutter data, and then obtain accurate current working parameter.
Step 203：It is determined that the first object water temperature and second target water temperature corresponding with current working parameter.
Wherein, first object water temperature is the water temperature that engine required for thermostat standard-sized sheet reaches, that is to say, that in engine
When reaching the first object water temperature, thermostat is in fully open position.
Second target water temperature is the water temperature of holding required for engine, that is to say, that control is started required for the present embodiment
The water temperature that machine reaches and kept, it is understood that into the ideal water temperatures of engine.First object water temperature is more than the second target water temperature.
In one implementation, the present embodiment can pre-set the first water temperature curve and the second water temperature curve.
Wherein, the first water temperature curve is the duty parameters such as default rotating speed torque load rate with being sent out required for thermostat standard-sized sheet
Corresponding relation curve between the water temperature that motivation is reached, duty parameter here refer to the parameters such as rotating speed, moment of torsion and rate of load condensate
Combination, engine can correspond to the water temperature required for a thermostat standard-sized sheet respectively under each duty parameter, that is to say, that example
Such as, each rotating speed, moment of torsion and rate of load condensate combination can a corresponding water temperature, and in the group of each rotating speed, moment of torsion and rate of load condensate
The possible difference of water temperature required for closing lower corresponding thermostat standard-sized sheet may also be identical, therefore, has in the first water temperature curve
Multiple mapping relations, the corresponding relation between respectively multiple rotating speeds, moment of torsion and the combination of rate of load condensate and water temperature.
Based on this, the first water temperature curve can be based in the present embodiment, by for example current rotating speed of current working parameter, current defeated
Go out moment of torsion to be compared with the first water temperature curve with the combination of current loads rate, corresponding water is searched in the first water temperature curve
Temperature value, as first object water temperature.
Second water temperature curve is that the corresponding relation between the water temperature of holding required for default duty parameter and engine is bent
Line, duty parameter here refer to the combination of the parameters such as rotating speed, moment of torsion and rate of load condensate, and engine is in each rotating speed, moment of torsion and negative
The water temperature that reaches required under the combination of the parameters such as lotus rate may it is identical may also be different, therefore, have in the second water temperature curve
Multiple mapping relations, the corresponding relation between respectively multiple rotating speeds, moment of torsion and the combination of rate of load condensate and water temperature.
Based on this, the second water temperature curve can be based in the present embodiment, by for example current rotating speed of current working parameter, current defeated
Go out moment of torsion to be compared with the second water temperature curve with the combination of current loads rate, corresponding water is searched in the second water temperature curve
Temperature value, as the second target water temperature.
It can be seen that demarcating two water temperature curves previously according to the duty parameter of engine in the present embodiment, controlled as feedforward
The input of system so that engine can be separately operable in suitable operating temperature under different operating modes.
In one implementation, because external environment is different, the first object water temperature and the second mesh of engine be may be such that
Mark water temperature is different, for example, environment temperature is higher, first object water temperature and the second target water temperature are relatively low, environmental pressure
Higher, first object water temperature and the second target water temperature are relatively low, and thus, the present embodiment is obtaining first object water temperature and second
, it is necessary to be modified to first object water temperature and the second target water temperature after target water temperature.
Specifically, it is bent to be based on default environment temperature amendment to first object water temperature and the second target water temperature in the present embodiment
Line and environmental pressure fair curve are modified.
Wherein, corresponding relation of the environment temperature fair curve between multiple environment temperature parameters and temperature corrected parameter is bent
Line, corresponding relation curve of the environmental pressure fair curve between multiple environmental pressure parameters and temperature corrected parameter.For example, ring
Border temperature parameter is higher, and corresponding temperature corrected parameter is negative value, during repairing positive goal water temperature, reduces corresponding parameter value；Again
Such as, environmental pressure parameter is higher, and corresponding temperature corrected parameter is negative value, during repairing positive goal water temperature, lowers corresponding parameter
Value.
Normal range (NR) is in environment temperature parameter and environmental pressure parameter, as engine is in the Plain in autumn or spring
During area, exemplified by setting first object water temperature as X, if engine enters plateau region, environmental pressure rise, if still setting the
One target water temperature is X, then error occurs, therefore, is raised, the principle that boiling point of liquid lowers, X is repaiied based on environmental pressure
Just, certain parameter value is subtracted, thus reduces first object water temperature.
Step 204：Judge whether engine opens auxiliary braking, if it is, performing step 205, otherwise, perform step
206。
The components such as example various comparators of detector and gate can be set on the engine in the present embodiment to monitor hair
Whether motivation opens auxiliary braking.
In one implementation, whether the present embodiment can be opened by judging the retarder of engine, to determine to send out
Whether motivation opens auxiliary braking；Or can be by judging the vehicle of the equipment such as vehicle where engine in the present embodiment
Whether retarder is opened, to determine whether engine opens auxiliary braking, such as whether touching on the brake.
By taking the engine in vehicle as an example, vehicle in normally travel, stepped on the gas by upward slope, and descending is not stepped on the gas and touched on the brake,
Therefore, in vehicle descending, during the descending to touch on the brake, engine is in wasted work, rather than acting state, auxiliary using braking
Help vehicle automatic, as auxiliary braking state, now, engine job specification changes, and auxiliary braking needs cooling to start
Machine, therefore, if it is judged that engine is in auxiliary braking state, then perform step 205.
Step 205：Control the aperture output duty cycle of thermostat so that thermostat is in fully open position.
Wherein, be able to can be incited somebody to action by being found in default thermostat standard-sized sheet maximum duty cycle curve in the present embodiment
The aperture output duty cycle of thermostat standard-sized sheet, and then come by PWM (Pulse Width Modulation, pulse width modulation)
Adjust the aperture output duty cycle of thermostat so that thermostat is in fully open position.
Step 206：Based on the first difference between first object water temperature and the current water temperature of engine, thermostat is controlled
Aperture output duty cycle so that the target water temperature of current water temperature convergence second of engine.
As shown in Figure 3, step 206 can be realized by following steps：
Step 301：Judge whether current water temperature is less than first object water temperature, if it is, performing step 302, otherwise, perform
Step 303.
That is, the water temperature that engine is reached when whether current water temperature is less than thermostat standard-sized sheet is judged in the present embodiment, if
The water temperature that engine is reached when current water temperature is less than thermostat standard-sized sheet, then perform step 302, otherwise perform step 303.
Step 302：Controlling the aperture output duty cycle of thermostat so that the aperture of thermostat is corresponding with the first difference,
Realize the target water temperature of current water temperature convergence second of engine.
Wherein, difference of first difference between first object water temperature and current water temperature.
Wherein, temperature will can be saved by being found in default thermostat aperture dutycycle curve in the present embodiment
The aperture output duty cycle of device, and then adjust by PWM the aperture of thermostat so that thermostat is in relative with the first difference
The position answered.
Step 303：Control the aperture output duty cycle of thermostat so that thermostat is in fully open position, realizes engine
The target water temperature of current water temperature convergence second.
It is to work as that is, in the present embodiment in the aperture output duty cycle based on the first difference control thermostat
During the water temperature that engine is reached when preceding water temperature is less than thermostat standard-sized sheet, control the aperture of thermostat corresponding with the first difference,
And if during engine is reached when current water temperature has met or exceeded thermostat standard-sized sheet water temperature, illustrate the water of engine
Temperature is very high, now needs the aperture of directly control thermostat to maximum, i.e. standard-sized sheet.
And after step 303 or step 205, the aperture of thermostat reached standard-sized sheet, now if engine
Water temperature is still very high, then need coordinate control cooling system other cooling-parts, such as the current water temperature based on engine and
Magnitude relationship between the default highest water temperature of engine, to control the combination of water pump and fan gear to be in target gear, come
Realize the target water temperature of current water temperature convergence second of engine.
Wherein, in the present embodiment, in the combination gear of water pump and fan, when gear rise adjusts, the shift transformation of water pump can
To be changed prior to the gear of fan, when gear reduces adjustment, the shift transformation of fan changes prior to the gear of water pump, example
Such as, when controlling the combination gear of water pump and fan to carry out gear Raise transform, the gear of water-change pump can be become first, in water pump
Gear is in highest and then converts the gear of fan, or, when gear is reduced and converted, the gear of fan is converted first,
The gear of fan is in gear that is minimum and then becoming water-change pump.
As shown in Figure 4, after step 303 or step 205, can also comprise the following steps in the present embodiment：
Step 401：Judge whether current water temperature is more than or equal to default highest water temperature, if it is, step 402 is performed,
Otherwise, step 403~step 404 is performed, i.e., based on the second difference between current water temperature and the second target water temperature, controls water pump
Combination gear with fan is on the gear corresponding with the second difference.
Wherein, when the water temperature of engine is near some water temperature such as first object water temperature, normal operation is remained able to, and such as
Fruit exceedes a certain degree of water temperature, then and engine is possible to exception occur, and in order to protect engine, ensure work just
Often operation, then need to set the limit water temperature of an engine, such as highest water temperature, more than the water temperature, then need to engine
Cooling dynamics is increased, is such as kept off using the combination of water pump and fan to coordinate control.
Step 402：The combination gear of control water pump and fan is in highest gear.
Step 403：When the second difference is more than default maximum temperature difference and the duration exceedes default first duration, control
Combination gear one gear of increase of water pump and fan processed.
Preferably, the present embodiment can preferentially increase water when controlling combination gear one gear of increase of water pump and fan
The gear of pump, the gear that is further added by fan is in after highest gear in the gear of water pump, i.e.,：If the gear of water pump is not in
The highest gear of water pump, then control the gear of water pump to increase a gear and keep the gear of fan constant, if the gear of water pump
Position is in highest gear, then controls the gear of fan and increase a gear.
Step 404：When the second difference is less than default minimum temperature difference and the duration exceedes default second duration, control
The combination gear of water pump and fan processed reduces a gear.
Preferably, the present embodiment can preferentially reduce water when controlling the combination gear of water pump and fan to reduce a gear
The gear of pump, the gear that again reduces fan is in after most low gear in the gear of water pump, i.e.,：If the gear of water pump is not in water
The deep low gear of pump, then control the gear of water pump to reduce a gear and keep the gear of fan constant, if the gear of water pump is
Through in minimum gear, then controlling the gear of fan increases a gear.
Thus, the temperature difference and the combination control program of duration are utilized in the present embodiment, according to radiating requirements, regulation section temperature
Device aperture, water pump and combination of fans gear, realization cool down on demand.For example, first according to the current water temperature of engine to thermostat
Aperture output duty cycle be controlled, the water temperature of engine is regulated and controled using thermostat, and thermostat aperture
Through reaching fully open position, and when the current water temperature of engine is still very high, group is carried out to other cooling-parts such as water pump and fan
Regulation is closed, the combination gear rise gear of water pump and fan is such as controlled or reduces gear to regulate and control the water temperature of engine.
Wherein, the first duration and the second duration can be with identical, can also be different, according to user's request and/or engine
Actual condition is configured.
That is, can be according to current water temperature and the difference of the second target water temperature of engine, i.e., in the present embodiment
Two differences, corresponding gear, the purpose of stagnant ring processing are in the combination gear of fan by different stagnant ring processing adjustment water pumps
It is to reduce fluctuation, realization progressively adjusts gear, avoids gear frequent fluctuation, influences engine work smooth-going.And if current water
Temperature is higher than highest water temperature, then is directly adjusted to highest gear.
By taking four-speed fan and two fast water pumps as an example, based on above-mentioned implementation, the gear of the aperture of thermostat, water pump and fan
Position state is as shown in table 1：
Table 1
| Mode number | Thermostat state | Water pump state | Fan-status | Remarks |
| 0 | Standard-sized sheet | 0 | 0 | Water pump Half Speed, fan are inoperative |
| 1 | Standard-sized sheet | 1 | 0 | Water pump full speed, fan are inoperative |
| 2 | Standard-sized sheet | 1 | 1 | Water pump full speed, 2 grades of fan |
| 3 | Standard-sized sheet | 1 | 2 | Water pump full speed, 3 grades of fan |
| 4 | Standard-sized sheet | 1 | 3 | Water pump full speed, 4 grades of fan |
That is, being based on above-mentioned implementation, if engine opens auxiliary braking, direct standard-sized sheet thermostat is to hair
The water temperature of motivation is adjusted, to cool to engine, and in the case where engine is not turned on the usual state of auxiliary braking, then
According to the difference between the engine water temperature required for the current water temperature of engine and default thermostat standard-sized sheet, to control section temperature
The aperture of device, such as：Engine current water temperature than relatively low, during less than engine water temperature required for thermostat standard-sized sheet, control
The aperture output duty cycle of thermostat processed so that the aperture of thermostat is corresponding with water temperature difference, is carried out by thermostat to engine
Cooling, if the current water temperature in engine raises, when being increased to more than or equal to engine water temperature required for thermostat standard-sized sheet,
Then control the aperture output duty cycle of thermostat so that thermostat is in fully open position, and monitors whether current water temperature is increased to
The highest water temperature of default engine, if current water temperature has been raised to the highest water temperature set by engine, directly will
The combination gear of water pump and fan is adjusted to highest gear, i.e. mode number 4 in table 1, if current water temperature is not increased to most
High water temperature, then the magnitude relationship between current water temperature and the second target water temperature is monitored, is higher than the second target water temperature in current water temperature
The temperature difference start timing when exceeding maximum temperature difference, if the duration of timing more than the first duration, the gear rise of control water pump, such as
Mode number 1 is transformed to by mode number 0 in table 1, engine cooled by thermostat and water pump, if afterwards current water temperature with
The temperature difference of second target water temperature then controls the gear rise of fan, such as still beyond maximum temperature difference and again above the first duration
Mode number 2 is transformed to by mode number 1 in table 1, or mode number 3 etc. is transformed to by mode number 2, by thermostat, water pump and wind
Fan simultaneously engine is cooled, it is seen then that in the present embodiment according to thermostat standard-sized sheet after, water pump is intervened again, after water pump full speed,
The principle that fan is intervened again, shorten the warming up time, save oil consumption, optimization discharge.
And be less than minimum temperature difference higher than the temperature difference of the second target water temperature in current water temperature, then reclocking, if timing when
Long gear one gear of reduction more than the second duration, then control fan, as transformed to mode number 3 by mode number 4 in table 1,
Engine is cooled by thermostat, water pump and fan, afterwards, if the temperature difference of current water temperature and the second target water temperature is still
Exceed the second duration less than minimum temperature difference and duration, then continue to control the gear of fan to reduce, at the gear of fan
In most low gear, engine is cooled by thermostat and water pump, as transformed to mode number 1 by mode number 2 in table 1, if working as
The temperature difference of preceding water temperature and the second target water temperature exceeds the second duration still less than minimum temperature difference and duration, then becomes water-change pump
Gear is reduced, and as transformed to mode number 0 by mode number 1 in table 1, engine is cooled by thermostat.
From such scheme, a kind of control method for engine temperature that the embodiment of the present application one provides, sent out
After the duty parameter and target water temperature of motivation, judged by the size of the current water temperature to engine, to coordinate control section temperature
The operation of device, such as carry out being afraid of to warm up by whether opening engine auxiliary braking, so as to control thermostat in different ways
Aperture output duty cycle enable the current water temperature of engine to target water temperature convergence, hereby it is achieved that by cooling
The control of cooling parts in system, to realize the temperature control to engine.
Further, can also be by right in the present embodiment after the duty parameter of engine and target water temperature is obtained
The size of the current water temperature of engine judges, to coordinate to control the operation between thermostat, water pump and fan, such as priority acccess control section
Warm device carries out operation cooling, after thermostat standard-sized sheet, the magnitude relationship of the target water temperature based on current water temperature and engine, then
The combination for adjusting water pump and fan is kept off, and gradual control, the final current water for causing engine are carried out to thermostat, water pump and fan
Temperature can be to target water temperature convergence, hereby it is achieved that by controlling the coordination between each parts in cooling system, to realize
To the temperature control of engine.
With reference to figure 5, a kind of structural representation of the control system of the engine temperature provided for the embodiment of the present application, its
In, cooling-part is comprised at least in the cooling system of engine：Thermostat, water pump and fan, the system can include：
Parameter acquisition interface 501, be connected with the engine, for gather the engine current working parameter and
Current water temperature.
Wherein, can include in current working parameter：Current rotating speed, current output torque and current loads rate etc..
It should be noted that the present embodiment is after current working parameter is acquired, can be by wave filter to current work
Condition parameter is filtered, and to remove the impurity or clutter data in supplemental characteristic, and then obtains accurate current working parameter.
First processor 502, it is connected with the parameter acquisition interface 501, for determining and the current working parameter
Corresponding first object water temperature, the first object water temperature are the water temperature that engine required for thermostat standard-sized sheet reaches, also
It is to say, when engine reaches the first object water temperature, thermostat is in fully open position.
First processor can be by FPGA (Field-Programmable Gate Array, field programmable gate array)
Realize.
In one implementation, first processor 502 can be realized by the first curve comparison chip, first curve
Compare chip be used for the current working parameter is compared with default first water temperature curve, obtain the rotating speed with it is described
First object water temperature corresponding to rate of load condensate.
Wherein, the default duty parameter of the first water temperature curve is reached with engine required for thermostat standard-sized sheet
Corresponding relation curve between water temperature.That is, the first water temperature curve is the duty parameters such as default rotating speed torque load rate
Corresponding relation curve between the water temperature reached with engine required for thermostat standard-sized sheet, duty parameter here refer to turn
The combination of the parameters such as speed, moment of torsion and rate of load condensate, engine can correspond to a thermostat standard-sized sheet institute respectively under each duty parameter
The water temperature needed, that is to say, that for example, the combination of each rotating speed, moment of torsion and rate of load condensate can a corresponding water temperature, and each
The possible difference of water temperature under the combination of rotating speed, moment of torsion and rate of load condensate required for corresponding thermostat standard-sized sheet may also be identical, because
This, has multiple mapping relations, between respectively multiple rotating speeds, moment of torsion and the combination of rate of load condensate and water temperature in the first water temperature curve
Corresponding relation.
Based on this, the first curve comparison chip can be based on the first water temperature curve in the present embodiment, by current working parameter
Such as current rotating speed, current output torque are compared with the combination of current loads rate with the first water temperature curve, bent in the first water temperature
Corresponding water temperature value is searched in line, as first object water temperature.
Second processor 503, it is connected with the parameter acquisition interface 501, for determining and the current working parameter
The second corresponding target water temperature, second target water temperature are the water temperature of holding required for the engine, that is to say, that this
The water temperature that control engine required for embodiment reaches and kept, it is understood that into the ideal water temperatures of engine.First object
Water temperature is more than the second target water temperature.
Second processor can be by FPGA (Field-Programmable Gate Array, field programmable gate array)
Realize.
In one implementation, second processor 503 can be realized by the second curve comparison chip, second curve
Chip is compared to be used to the current working parameter being compared with default second water temperature curve, obtain the current rotating speed and
Second target water temperature corresponding to the current loads rate.
Wherein, second water temperature curve is pair between the water temperature of holding required for default duty parameter and engine
Answer relation curve, duty parameter here refers to the combination of the parameters such as rotating speed, moment of torsion and rate of load condensate, engine each rotating speed,
The water temperature that reaches required under the combination of the parameter such as moment of torsion and rate of load condensate may it is identical may also be different, therefore, the second water temperature is bent
There is multiple mapping relations, the corresponding relation between respectively multiple rotating speeds, moment of torsion and the combination of rate of load condensate and water temperature in line.
Based on this, the second curve comparison chip can be based on the second water temperature curve in the present embodiment, by current working parameter
Such as current rotating speed, current output torque are compared with the combination of current loads rate with the second water temperature curve, bent in the second water temperature
Corresponding water temperature value is searched in line, as the second target water temperature.
It can be seen that demarcating two water temperature curves previously according to the duty parameter of engine in the present embodiment, controlled as feedforward
The input of system so that engine can be separately operable in suitable operating temperature under different operating modes.
And in actual applications, because external environment is different, it may be such that the first object water temperature and second of engine
Target water temperature is different, for example, environment temperature is higher, first object water temperature and the second target water temperature are relatively low, environment pressure
Power is higher, and first object water temperature and the second target water temperature are relatively low, and thus, the present embodiment is obtaining first object water temperature and the
, it is necessary to be modified to first object water temperature and the second target water temperature after two target water temperatures.
Based on this, following chip structure is also provided with cooling system：
First amendment chip, it is that the first curve comparison chip is connected with the first processor 502, for described the
One target water temperature is based on default environment temperature fair curve and environmental pressure fair curve is modified.
Wherein, corresponding pass of the environment temperature fair curve between multiple environment temperature parameters and temperature corrected parameter
It is curve, corresponding relation of the environmental pressure fair curve between multiple environmental pressure parameters and temperature corrected parameter is bent
Line.
Second amendment chip, it is that the second curve comparison chip is connected with the second processor 503, for described the
Two target water temperatures are based on default environment temperature fair curve and environmental pressure fair curve is modified；
Wherein, corresponding pass of the environment temperature fair curve between multiple environment temperature parameters and temperature corrected parameter
It is curve, corresponding relation of the environmental pressure fair curve between multiple environmental pressure parameters and temperature corrected parameter is bent
Line.
First amendment chip and the second amendment chip can be realized by adder and subtracter.
For example, environment temperature parameter is higher, corresponding temperature corrected parameter is negative value, during repairing positive goal water temperature, is reduced
Corresponding parameter value；For another example, environmental pressure parameter is higher, and corresponding temperature corrected parameter is negative value, during repairing positive goal water temperature,
Lower corresponding parameter value.
Normal range (NR) is in environment temperature parameter and environmental pressure parameter, as engine is in the Plain in autumn or spring
During area, exemplified by setting first object water temperature as X, if engine enters plateau region, environmental pressure rise, if still setting the
One target water temperature is X, then error occurs, therefore, is raised, the principle that boiling point of liquid lowers, X is repaiied based on environmental pressure
Just, certain parameter value is subtracted, thus reduces first object water temperature.
First electric control gear 504, is connected with thermostat, is the electric control gear of thermostat, is mainly used in controlling thermostat
Aperture output duty cycle.
Braking performance test device 505, it is connected with engine and the first electric control gear 504, for judging whether engine is opened
Auxiliary braking, if engine opens auxiliary braking, the aperture output duty of triggering the first electric control gear 504 control thermostat
Than so that the thermostat is in fully open position, if engine is not turned on auxiliary braking, triggers the first electric control gear 504
Based on the first difference between first object water temperature and current water temperature, the aperture output duty cycle of thermostat is controlled so that start
The target water temperature of current water temperature convergence second of machine.
Wherein, whether the present embodiment can be opened by judging the retarder of engine, to determine whether engine is opened
Auxiliary braking；Or whether can be opened by judging the vehicle retarder of the equipment such as vehicle where engine in the present embodiment
Open, to determine whether engine opens auxiliary braking, such as whether touching on the brake.
In one implementation, the first electric control gear 504 can include following structure, as shown in Figure 6：
First comparator 601, for judging whether the current water temperature is less than the first object water temperature；
First controller 602, is connected with first comparator 601, if being less than described first for the current water temperature
Target water temperature, control the aperture output duty cycle of the thermostat so that the aperture of the thermostat and the first object water
Warm the first difference between the current water temperature is corresponding, realizes the second target described in the current water temperature convergence of the engine
Water temperature, if the current water temperature is more than or equal to the first object water temperature, the aperture of the thermostat is controlled to export duty
Than so that the thermostat is in fully open position.
Wherein, in the present embodiment, the first controller 602 can be by default thermostat standard-sized sheet maximum duty cycle curve
In find can by the aperture output duty cycle of thermostat standard-sized sheet, and then by PWM (Pulse Width Modulation,
Pulse width modulation) adjust the aperture of thermostat so that and thermostat is in fully open position.
It is to work as that is, in the present embodiment in the aperture output duty cycle based on the first difference control thermostat
During the water temperature that engine is reached when preceding water temperature is less than thermostat standard-sized sheet, control the aperture of thermostat corresponding with the first difference,
And if during engine is reached when current water temperature has met or exceeded thermostat standard-sized sheet water temperature, illustrate the water of engine
Temperature is very high, now needs the aperture of directly control thermostat to maximum, i.e. standard-sized sheet.
And after the first electric control gear 504 control thermostat is in standard-sized sheet, now if the water temperature of engine is still very high,
So need to coordinate other cooling-parts in control cooling system, such as water pump and fan, to realize the current of engine long
The target water temperature of water temperature convergence second.As shown in Figure 7, the cooling system in the present embodiment can also include it is following have it is second automatically controlled
Device 506, to the magnitude relationship between the current water temperature based on engine and the default highest water temperature of engine, to control
The combination gear of water pump and fan is in target gear, to realize the target water temperature of current water temperature convergence second of engine.
Wherein, in the present embodiment, in the combination gear of water pump and fan, when gear rise adjusts, the shift transformation of water pump can
To be changed prior to the gear of fan, when gear reduces adjustment, the shift transformation of fan changes prior to the gear of water pump, example
Such as, the second electric control gear 506 can become water-change pump first when controlling the combination gear of water pump and fan to carry out gear Raise transform
Gear, the gear of water pump be in highest and then convert fan gear, or, gear reduce convert when, become first
The gear of fan is changed, gear that is minimum and then becoming water-change pump is in the gear of fan.In one implementation, second
Electric control gear 506 can include following structure, as shown in Figure 8：
Second comparator 801, for judging whether the current water temperature is more than or equal to default highest water temperature.
Wherein, when the water temperature of engine is near some water temperature such as first object water temperature, normal operation is remained able to, and such as
Fruit exceedes a certain degree of water temperature, then and engine is possible to exception occur, and in order to protect engine, ensure work just
Often operation, then need to set the limit water temperature of an engine, such as highest water temperature, more than the water temperature, then need to engine
Cooling dynamics is increased, is such as kept off using the combination of water pump and fan to coordinate control.
Second controller 802, if being more than or equal to the highest water temperature for the current water temperature, control the water pump
Highest gear is in the combination gear of fan；If the current water temperature is less than the highest water temperature, based on the current water temperature
With the second difference between second target water temperature, control the combination of the water pump and fan to keep off and be in and second difference
Corresponding gear.
In one implementation, second controller 802 is based on second between current water temperature and the second target water temperature
Difference, specifically can be in the following manner when control water pump is in the gear corresponding with the second difference with the combination gear of fan
Realize：
First, second controller 802 judges whether the second difference is more than default maximum temperature difference and the duration exceedes in advance
If the first duration, if it is, control water pump and fan combination gear increase by one gear.
In one implementation, second controller 802 is when controlling combination gear one gear of increase of water pump and fan,
The gear of water pump can preferentially be increased, the gear for being further added by fan is in after highest gear in the gear of water pump, i.e.,：If water
The gear of pump is not in the highest gear of water pump, then controls the gear of water pump and increase a gear and keep the gear of fan not
Become, if the gear of water pump is in highest gear, the gear of control fan increases a gear.
In addition, second controller 802 is judging that the second difference is less than default minimum temperature difference and the duration surpasses
When crossing default second duration, controlling the combination of the water pump and fan to keep off reduces a gear.
In one implementation, second controller 802 is when controlling the combination gear of water pump and fan to reduce a gear,
The gear of water pump can be preferentially reduced, the gear for reducing fan again is in after most low gear in the gear of water pump, i.e.,：If water pump
Gear be not in the deep low gear of water pump, then control the gear of water pump to reduce a gear and keep the gear of fan constant, such as
The gear of fruit water pump is in minimum gear, then controls the gear of fan and increase a gear.
Thus, the temperature difference and the combination control program of duration are utilized in the present embodiment, according to radiating requirements, regulation section temperature
Device aperture, water pump and combination of fans gear, realization cool down on demand.For example, first according to the current water temperature of engine to thermostat
Aperture output duty cycle be controlled, the water temperature of engine is regulated and controled using thermostat, and thermostat aperture
Through reaching fully open position, and when the current water temperature of engine is still very high, group is carried out to other cooling-parts such as water pump and fan
Regulation is closed, the combination gear rise gear of water pump and fan is such as controlled or reduces gear to regulate and control the water temperature of engine.
As shown in FIG. 9 to 11, it is the component of the present embodiment or the logic placement schematic diagram of chip in practical application,
Wherein, described with reference to scheme above, Fig. 9 is the control logic layout of two target water temperatures, is included：Wave filter, subtracter and
The components such as adder, Figure 10 are the automatically controlled logic placement of thermostat, are included：Comparator, subtracter, selecting switch and various patrol
Door component etc. is collected, Figure 11 is the combination gear logic placement of water pump and fan, is included：It is comparator, subtracter, selecting switch, stagnant
Ring processor, adder and various logic door component etc..
It should be noted that each embodiment in this specification is described by the way of progressive, each embodiment weight
Point explanation is all difference with other embodiment, between each embodiment identical similar part mutually referring to.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or equipment including a series of elements not only include that
A little key elements, but also the other element including being not expressly set out, or also include for this process, method, article or
The intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence "including a ...", is not arranged
Except other identical element in the process including the key element, method, article or equipment being also present.
The control method and system of a kind of engine temperature provided by the present invention are described in detail above, to institute
The described above of disclosed embodiment, professional and technical personnel in the field are enable to realize or using the present invention.To these embodiments
A variety of modifications will be apparent for those skilled in the art, generic principles defined herein can be with
Without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will not be limited
In the embodiments shown herein, and it is to fit to the most wide model consistent with principles disclosed herein and features of novelty
Enclose.
Claims (10)
- A kind of 1. control method of engine temperature, it is characterised in that including：The current working parameter and current water temperature of engine are obtained, cooling end is comprised at least in the cooling system of the engine Part：Thermostat；It is determined that the first object water temperature and second target water temperature corresponding with the current working parameter, the first object water temperature The water temperature reached for engine required for thermostat standard-sized sheet, second target water temperature are the water of holding required for the engine Temperature；Judge whether the engine opens auxiliary braking；If the engine opens auxiliary braking, the aperture output duty cycle of the thermostat is controlled so that the thermostat In fully open position；If the engine is not turned on auxiliary braking, based between the first object water temperature and the current water temperature One difference, control the aperture output duty cycle of the thermostat so that the second mesh described in the current water temperature convergence of the engine Mark water temperature.
- 2. according to the method for claim 1, it is characterised in that based on the first object water temperature and the current water temperature it Between the first difference, control the aperture output duty cycle of the thermostat, including：Judge whether the current water temperature is less than the first object water temperature；If the current water temperature is less than the first object water temperature, the aperture output duty cycle of the thermostat is controlled so that The first difference between the aperture of the thermostat and the first object water temperature and the current water temperature is corresponding, described in realization Second target water temperature described in the current water temperature convergence of engine；If the current water temperature is more than or equal to the first object water temperature, the aperture of the thermostat is controlled to export duty Than so that the thermostat is in fully open position, realizes the second target water temperature described in the current water temperature convergence of the engine.
- 3. method according to claim 1 or 2, it is characterised in that also include cooling-part in the cooling system：Water pump And fan；Wherein, the aperture output duty cycle of the thermostat is being controlled so that the thermostat is in after fully open position, described Method also includes：Judge whether the current water temperature is more than or equal to default highest water temperature；If the current water temperature is more than or equal to the highest water temperature, controls the combination of the water pump and fan to keep off and be in highest Gear；If the current water temperature is less than the highest water temperature, based between the current water temperature and second target water temperature Second difference, the water pump is controlled to be in the gear corresponding with second difference with the combination gear of fan.
- 4. according to the method for claim 3, it is characterised in that based on the current water temperature and second target water temperature it Between the second difference, control the combination gear of the water pump and fan to be in the gear corresponding with second difference, including：Judge whether second difference is more than default maximum temperature difference and the duration exceedes default first duration, if It is that the combination for controlling the water pump and fan keeps off one gear of increase；Judge whether second difference is less than default minimum temperature difference and the duration exceedes default second duration, if It is to control the combination of the water pump and fan to keep off to reduce a gear.
- 5. according to the method for claim 4, it is characterised in that：Combination gear one gear of increase for controlling the water pump and fan, including：If the gear of the water pump is not in the highest gear of water pump, control the water pump gear increase a gear and Keep the gear of the fan constant, otherwise, controlling the gear of the fan increases a gear；The combination gear for controlling the water pump and fan reduces a gear, including：If the gear of the water pump is not in the minimum gear of water pump, control the water pump gear reduce a gear and Keep the gear of the fan constant, otherwise, controlling the gear of the fan reduces a gear.
- 6. a kind of control system of engine temperature, it is characterised in that cooling is comprised at least in the cooling system of the engine Part：Thermostat, the system include：Parameter acquisition interface, it is connected with the engine, for the current working parameter for gathering the engine and current water Temperature；First processor, it is connected with the parameter acquisition interface, for determining corresponding with the current working parameter the One target water temperature, the first object water temperature are the water temperature that engine required for thermostat standard-sized sheet reaches；Second processor, it is connected with the parameter acquisition interface, for determining corresponding with the current working parameter the Two target water temperatures, second target water temperature are the water temperature of holding required for the engine；First electric control gear, it is connected with the thermostat, for controlling the aperture output duty cycle of the thermostat；Braking performance test device, it is connected with the engine and first electric control gear, for judging whether the engine is opened Auxiliary braking is opened, if the engine opens auxiliary braking, first electric control gear is triggered and controls opening for the thermostat Spend output duty cycle so that the thermostat is in fully open position, if the engine is not turned on auxiliary braking, triggers institute The first electric control gear is stated based on the first difference between the first object water temperature and the current water temperature, controls the thermostat Aperture output duty cycle so that the second target water temperature described in the current water temperature convergence of the engine.
- 7. system according to claim 6, it is characterised in that first electric control gear includes：First comparator, for judging whether the current water temperature is less than the first object water temperature；First controller, it is connected with the first comparator, if being less than the first object water for the current water temperature Temperature, control the aperture output duty cycle of the thermostat so that the aperture of the thermostat and the first object water temperature and institute The first difference stated between current water temperature is corresponding, realizes the second target water temperature described in the current water temperature convergence of the engine； If the current water temperature is more than or equal to the first object water temperature, the aperture output duty cycle of the thermostat is controlled, is made Obtain the thermostat and be in fully open position, realize the second target water temperature described in the current water temperature convergence of the engine.
- 8. system according to claim 6, it is characterised in that the cooling system also includes cooling-part：Water pump and wind Fan；Wherein, the cooling system also includes：Second electric control gear, second electric control gear include：Second comparator, for judging whether the current water temperature is more than or equal to default highest water temperature；Second controller, if being more than or equal to the highest water temperature for the current water temperature, control the water pump and fan Combination gear be in highest gear；If the current water temperature is less than the highest water temperature, based on the current water temperature with it is described The second difference between second target water temperature, the water pump is controlled to be in corresponding with second difference with the combination gear of fan Gear.
- 9. system according to claim 8, it is characterised in that the second controller be based on the current water temperature with it is described The second difference between second target water temperature, the water pump is controlled to be in corresponding with second difference with the combination gear of fan Gear, including：Judge whether second difference is more than default maximum temperature difference and the duration exceedes default first duration, if It is that the combination for controlling the water pump and fan keeps off one gear of increase；Judge whether second difference is less than default minimum The temperature difference and duration exceedes default second duration, if it is, controlling the combination of the water pump and fan to keep off reduces a gear Position.
- 10. system according to claim 9, it is characterised in that the second controller controls the water pump and fan Combination gear one gear of increase, including：If the gear of the water pump is not in the highest gear of water pump, control the water pump gear increase a gear and Keep the gear of the fan constant, otherwise, controlling the gear of the fan increases a gear；The second controller controls the combination gear of the water pump and fan to reduce a gear, including：If the gear of the water pump is not in the minimum gear of water pump, control the water pump gear reduce a gear and Keep the gear of the fan constant, otherwise, controlling the gear of the fan reduces a gear.
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| CN201610910948.XA CN106285907A (en) | 2016-10-19 | 2016-10-19 | The control method of a kind of engine temperature, Apparatus and system |
| CN201610910948X | 2016-10-19 |
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| CN201710966186.XA Pending CN107725166A (en) | 2016-10-19 | 2017-10-17 | The control method and system of a kind of engine temperature |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109611189A (en) * | 2018-11-28 | 2019-04-12 | 潍柴动力股份有限公司 | A kind of control system and method for diesel engine |
| CN109681335A (en) * | 2018-12-21 | 2019-04-26 | 潍柴动力股份有限公司 | A kind of engine thermal protection control method and device |
| CN111005799A (en) * | 2019-11-25 | 2020-04-14 | 一汽解放汽车有限公司 | Water temperature control method and device, thermal management system and storage medium |
| CN111005799B (en) * | 2019-11-25 | 2021-01-19 | 一汽解放汽车有限公司 | Water temperature control method and device, thermal management system and storage medium |
| CN112748752A (en) * | 2020-12-21 | 2021-05-04 | 上海联影医疗科技股份有限公司 | Cooling system temperature adjusting method and device, computer equipment and storage medium |
| CN113565615A (en) * | 2021-07-06 | 2021-10-29 | 东风柳州汽车有限公司 | Control method, equipment, storage medium and device for improving cooling capacity of engine |
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