CN105569803B - Engine thermal management control method and device based on two fast electric control pumps - Google Patents
Engine thermal management control method and device based on two fast electric control pumps Download PDFInfo
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- CN105569803B CN105569803B CN201610013036.2A CN201610013036A CN105569803B CN 105569803 B CN105569803 B CN 105569803B CN 201610013036 A CN201610013036 A CN 201610013036A CN 105569803 B CN105569803 B CN 105569803B
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- temperature
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- electric control
- design temperature
- thermostat
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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
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine 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
- F01P2050/00—Applications
- F01P2050/22—Motor-cars
Abstract
The present invention relates to a kind of engine thermal management control method and device based on two fast electric control pumps.This method includes：When electric control pump is placed in two fast modes, electric control pump is arranged to by half-speed operation or full-speed operation according to the controlled parameter that engine speed and load factor and each regulation and control subelement obtain.The device is realized based on the above method.Pump rotary speed associates with engine load in the present invention, realizes the rotating speed for more accurately controlling water pump；The demand of other heat managements of engine can also be taken into account simultaneously, improve the reliability of engine work.
Description
Technical field
The present invention relates to vehicle thermal management technology field, and in particular to a kind of engine heat pipe based on two fast electric control pumps
Manage control method and device.
Background technology
Engine thermal administrative skill main purpose is exactly engine is maintained at optimal cooling as far as possible when work
Water temperature, exhaust gas recirculatioon EGR intake air temperature and oil temperature etc..Application No. CN201010563109.8 Chinese patent Shen
A kind of devices and methods therefor for being used to control electric water pump of hybrid vehicle please be disclose, engine coolant is carried out using water pump
Temperature control.Application No. CN201110049685.5 Chinese patent application discloses heat management device of electric car, uses
Water pump radiates to radiator.
Above-mentioned document has sketched demand of the engine thermal management to water pump from system perspective, but without the specific control of proposition
Method and principle processed.Further, since engine, which also has miscellaneous part, needs heat management, ignore if only focusing on system specific
Part, then can influence the normal work of engine.
The content of the invention
For in the prior art the defects of, the present invention provide it is a kind of based on two fast electric control pumps engine thermal management control
Method and device, can according to the actual demand of engine and the actual working state of water pump to engine and accordingly quilt
Control part and carry out heat management, improve the accuracy and functional reliability of engine thermal management.
In a first aspect, the invention provides the engine thermal management control method based on two fast electric control pumps, including：
When electric control pump is placed in two fast modes, obtained according to engine speed and load factor and each regulation and control subelement
Electric control pump is arranged to half-speed operation or full-speed operation by controlled parameter.
More preferably, when controlled parameter is ECT, the control method includes：
Described electric control pump coolant design temperature in full-speed operation is obtained according to engine speed and load factor；
The coolant design temperature is modified according to environmental air pressure to obtain amendment design temperature；
When the actual temperature of the coolant design temperature and is higher than thermostat standard-sized sheet design temperature higher than amendment, or at this
When the actual temperature of coolant opens design temperature higher than amendment design temperature and at the beginning of being higher than thermostat, the electric control pump is arranged to
Full-speed operation；
When the actual temperature of the coolant design temperature and is less than thermostat standard-sized sheet design temperature less than amendment, or at this
When the actual temperature of coolant opens design temperature less than amendment design temperature and at the beginning of being less than thermostat, the electric control pump is arranged to
Half-speed operation.
More preferably, Hysteresis control is used when controlled parameter is ECT, the control method includes：
Described electric control pump coolant design temperature in full-speed operation is obtained according to engine speed and load factor；
The coolant design temperature is modified according to environmental air pressure to obtain amendment design temperature；
When the actual temperature of the coolant higher than amendment design temperature and the first compensation rate sum and is higher than thermostat standard-sized sheet
When design temperature and the first compensation rate sum, or the coolant actual temperature higher than amendment design temperature with first compensate
When measuring sum and just opening design temperature and the first compensation rate sum higher than thermostat, the electric control pump is arranged to full-speed operation；
When the actual temperature of the coolant is higher than amendment design temperature and less than thermostat standard-sized sheet design temperature and the first benefit
The amount of repaying sum, or the coolant actual temperature higher than amendment design temperature and less than opening design temperature and the at the beginning of thermostat
One compensation rate sum, or coolant actual temperature less than amendment design temperature and the second compensation rate difference when, this is automatically controlled
Water pump is arranged to half-speed operation.
More preferably, the thermostat standard-sized sheet design temperature is fixed temperature, or is looked into according to engine speed and load factor
MAP is ask to obtain；Wherein, MAP refers to, table is exported according to the default controlled parameter of engine particular state.
More preferably, when controlled parameter is engine motor oil temperature, the control method includes：
Obtaining engine motor oil according to engine speed and load factor allows to set operating temperature；
If engine motor oil actual temperature allows to set operating temperature higher than machine oil, the electric control pump is arranged to complete
Speed operating；
, should if engine motor oil actual temperature allows the difference of setting operating temperature and the 3rd compensation rate less than machine oil
Electric control pump is arranged to half-speed operation；
If engine motor oil actual temperature allows to set operating temperature and allows to set work temperature higher than machine oil less than machine oil
During the difference of degree and the 3rd compensation rate, the operating condition of electric control pump is maintained.
More preferably, when controlled parameter is urea box temperature, the control method includes：
Thermostat is obtained according to engine speed and load factor and just opens design temperature；
When engine coolant actual temperature just opens the difference of design temperature and the 4th compensation rate higher than thermostat or is higher than
Fixed thermostat just opens the difference of temperature and the 4th compensation rate, and when urea box temperature is less than the urea box design temperature, by this
Electric control pump is arranged to full-speed operation；
When engine coolant actual temperature just opens the difference of design temperature and the 4th compensation rate higher than thermostat or is higher than
Fixed thermostat just opens the difference of temperature and the 4th compensation rate, and when urea box temperature is higher than the urea box design temperature, by this
Electric control pump is arranged to half-speed operation；
When engine coolant actual temperature just opens the difference of design temperature and the 4th compensation rate less than thermostat or is less than
When fixed thermostat just opens the difference of temperature and the 4th compensation rate, the electric control pump is arranged to half-speed operation.
More preferably, when controlled parameter is exhaust gas recirculatioon EGR temperature, the control method includes：
When EGR actual temperatures are higher than EGR design temperatures, the electric control pump is arranged to full-speed operation；
If EGR actual temperatures are less than the difference of EGR actual temperatures and the 5th compensation rate, the electric control pump is arranged to half
Speed operating；
If EGR actual temperatures are mended less than EGR actual temperatures less than EGR design temperatures and higher than EGR actual temperatures and the 5th
During the difference for the amount of repaying, the operating condition of electric control pump is maintained.
More preferably, when controlled parameter is warm air temperature, the control method includes：
When air-conditioning opening has warm wind demand and ECT is higher than air-conditioning heating water temperature, by the electric control pump
It is arranged to full-speed operation.
More preferably, when engine is overrun, engine is in auxiliary braking state, cooling-water temperature transmitter failure, machine oil
During one or more in temperature sensor fault or EGR temperature sensor fault, the electric control pump is arranged at full speed
Operating, to ensure the reliability of engine work.
Second aspect, the embodiment of the present invention additionally provide a kind of engine thermal management control dress based on two fast electric control pumps
To put, realized based on engine thermal management control method described above, the device is used for when electric control pump is placed in two fast modes,
Electric control pump is arranged to by half-speed operation according to the controlled parameter that engine speed and load factor and each regulation and control subelement obtain
Or full-speed operation.
As shown from the above technical solution, the present invention combines the actual demand of engine and the real work of two fast electric control pumps
State, propose feasible control strategy.The present invention can not only reduce engine cold state abrasion, it is ensured that each heat management
Demand, it is possible to increase the precision degree and reliability of engine thermal management.
Brief description of the drawings
The features and advantages of the present invention can be more clearly understood by reference to accompanying drawing, accompanying drawing is schematically without that should manage
Solve to carry out any restrictions to the present invention, in the accompanying drawings：
Fig. 1 is provided in an embodiment of the present invention two fast electric control pump control logic schematic flow sheets；
Fig. 2 is provided in an embodiment of the present invention two fast electric control pump control complete schematics；
Fig. 3 is coolant temperature control logic schematic flow sheet provided in an embodiment of the present invention；
Fig. 4 is oil temperature control logic schematic flow sheet provided in an embodiment of the present invention；
Fig. 5 is urea box temperature control control logic schematic flow sheet provided in an embodiment of the present invention；
Fig. 6 is exhaust gas recirculatioon EGR coolings control logic schematic flow sheet provided in an embodiment of the present invention；
Fig. 7 is other control logic schematic flow sheets provided in an embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
The embodiments of the invention provide a kind of engine thermal management control method based on two fast electric control pumps, such as Fig. 1 institutes
Show, including：When electric control pump is placed in two fast modes, obtained according to engine speed and load factor and each regulation and control subelement
Electric control pump is arranged to half-speed operation or full-speed operation by controlled parameter.
In the present invention, two fast electric control pumps have two kinds of connections to set.When electronic selection switch is demarcated as 1, the automatically controlled water
Equivalent to one tradition machinery water pump of pump；It is automatically controlled to this according to control logic as shown in Figure 1 when selecting switch is demarcated as 0
Water pump exports the control signal of different duty, so as to realize the rotating speed to the electric control pump.In practical application, the electric control pump
Flow not only have influence on outside coolant temperature, also affect urea box temperature control, exhaust gas recirculatioon (Exhaust Gas
Recirculation, EGR) cooling, machine oil cooling etc. process.For engine thermal management reliability, above-mentioned thermal management requirements
It is of equal importance, but the limitation of each thermal management requirements is different, so these thermal management requirements can individually control pump rotary speed；Together
When, the factor such as the on-position of engine, Overrun states, warm wind demand, sensor fault can also individually control automatically controlled water
The rotating speed of pump.
As shown in Figure 2 and Figure 3, in coolant temperature control logic provided by the invention, with engine speed and rate of load condensate
For input quantity, look into MAP and obtain the coolant design temperature of water pump full speed.Wherein, MAP refers to be preset according to engine particular state
Controlled parameter output table.Because coolant boiling point can reduce as height above sea level increases, plains region and highlands is caused to permit
Perhaps operating temperature is different.Therefore in the case where ensureing identical safe clearance according to environmental pressure to coolant set temperature value
Be modified, if the actual temperature of coolant higher than amendment design temperature, and thermostat standard-sized sheet, then electric control pump
Electromagnetic clutch closes, the electric control pump full-speed operation；Otherwise, electromagnetic clutch separates, the electric control pump half-speed operation.
It should be noted that thermostat standard-sized sheet temperature may be set to fixed temperature, also can be according to engine speed, rate of load condensate
The two variables, which are looked into MAP, to be obtained.
Cause electromagnetic clutch perseveration to avoid the occurrence of when coolant temperature fluctuates above and below setting value, generation is shaken
It is dynamic, Hysteresis control is used to coolant temperature limitation：
When the actual temperature of the coolant is higher than amendment design temperature and higher than thermostat standard-sized sheet design temperature and the first benefit
The amount of repaying sum, or the coolant actual temperature higher than amendment design temperature and higher than opening design temperature and the at the beginning of thermostat
During one compensation rate sum, the electric control pump is arranged to full-speed operation；
When the actual temperature of the coolant is higher than amendment design temperature and less than thermostat standard-sized sheet design temperature and the first benefit
The amount of repaying sum, or the coolant actual temperature higher than amendment design temperature and less than opening design temperature and the at the beginning of thermostat
One compensation rate sum, or coolant actual temperature less than amendment design temperature and the second compensation rate difference when, this is automatically controlled
Water pump is arranged to half-speed operation.
Wherein, such as in the embodiment of the present invention above-mentioned first compensation rate is 2 degrees Celsius, and the second compensation rate is 5 degrees Celsius.It is logical
Cross and the first compensation rate and the second compensation rate are set, just can open design temperature, standard-sized sheet design temperature and automatically controlled water with thermostat
Pump full speed design temperature is divided into two different reduced values when comparing, so as to avoid fluctuating above and below a setting value, draw
Electromagnetic clutch perseveration is played, improves the life-span of clutch, reduces temperature oscillation.
When controlled parameter is engine motor oil temperature, obtains machine oil according to engine speed and rate of load condensate inquiry MAP and permit
Perhaps operating temperature is set, if oil temperature allows to set operating temperature higher than machine oil, electromagnetic clutch combines, electric control pump
Full-speed operation, otherwise electromagnetic clutch separation, water pump half-speed operation.
Electromagnetic clutch is caused to move repeatedly when allowing and setting the fluctuation of above and below operating temperature value to avoid the occurrence of oil temperature
Make, produce vibration, the limitation to oil temperature uses Hysteresis control, as shown in Fig. 2 and Fig. 4：
Obtaining engine motor oil according to engine speed and load factor allows to set operating temperature；
If engine motor oil actual temperature allows to set operating temperature higher than machine oil, the electric control pump is arranged to complete
Speed operating；
, should if engine motor oil actual temperature allows the difference of setting operating temperature and the 3rd compensation rate less than machine oil
Electric control pump is arranged to half-speed operation；
If engine motor oil actual temperature allows to set operating temperature and allows to set work temperature higher than machine oil less than machine oil
During the difference of degree and the 3rd compensation rate, the operating condition of electric control pump is maintained.
Wherein, the 3rd compensation rate is arranged to 5 degrees Celsius.Those skilled in the art can be closed according to specifically used scene
Reason is set, and the present invention is not construed as limiting.
Fig. 5 is urea box temperature control logic schematic flow sheet provided in an embodiment of the present invention.Because urea box heating exists
Winter or cold area's urea box easily freeze, and urea box temperature are detected by urea box temperature sensor, if urea box temperature is low
In design temperature, meanwhile, coolant temperature has reached thermostat and has just opened temperature, then water pump electromagnetic clutch combines, and water pump is at full speed
Operating, otherwise, electromagnetic clutch separation, water pump half-speed operation.Similarly, stagnant ring control can also be used to urea box temperature control
System, as shown in figures 2 and 5：
Thermostat is obtained according to engine speed and load factor and just opens design temperature；
When engine coolant actual temperature just opens the difference of design temperature and the 4th compensation rate higher than thermostat or is higher than
Fixed thermostat just opens the difference of temperature and the 4th compensation rate, and when urea box temperature is less than the urea box design temperature, by this
Electric control pump is arranged to full-speed operation；
When engine coolant actual temperature just opens the difference of design temperature and the 4th compensation rate higher than thermostat or is higher than
Fixed thermostat just opens the difference of temperature and the 4th compensation rate, and when urea box temperature is higher than the urea box design temperature, by this
Electric control pump is arranged to half-speed operation；
When engine coolant actual temperature just opens the difference of design temperature and the 4th compensation rate less than thermostat or is less than
When fixed thermostat just opens the difference of temperature and the 4th compensation rate, the electric control pump is arranged to half-speed operation.
Wherein the 4th compensation rate is provided with 2 degrees Celsius.Those skilled in the art can be closed according to specifically used scene
Reason is set, and the present invention is not construed as limiting.
If vehicle has EGR cooling requirements, temperature can also individually control the rotating speed of water pump after EGR coolings, and Fig. 6 is this hair
The EGR cooling control logic schematic flow sheets that bright embodiment provides.When EGR cooling after temperature be higher than design temperature when, electromagnetism from
Clutch combines, electric control pump full-speed operation, and otherwise electromagnetic clutch separates, water pump half-speed operation.In addition, to avoid the occurrence of EGR
Cause water pump electromagnetic clutch perseveration when temperature fluctuates above and below setting value after cooling, produce vibration, temperature after being cooled down to EGR
The limitation of degree uses Hysteresis control, as shown in Fig. 2 and Fig. 6：
When EGR actual temperatures are higher than EGR design temperatures, the electric control pump is arranged to full-speed operation；
If EGR actual temperatures are less than the difference of EGR actual temperatures and the 5th compensation rate, the electric control pump is arranged to half
Speed operating；
If EGR actual temperatures are mended less than EGR actual temperatures less than EGR design temperatures and higher than EGR actual temperatures and the 5th
During the difference for the amount of repaying, the operating condition of electric control pump is maintained.
Wherein the 4th compensation rate is provided with 5 degrees Celsius.Those skilled in the art can be closed according to specifically used scene
Reason is set, and the present invention is not construed as limiting.
As shown in Fig. 2 and Fig. 7, in addition to above heat management Control factors, when vehicle has warm wind demand and air-conditioning has turned on
In the case of, if the actual temperature of engine coolant combines higher than air-conditioning heating water temperature, electromagnetic clutch, water pump is at full speed
Operating；When engine, which is in, overruns (overrun) state or auxiliary braking state, in order to increase braking work, while meet certain
A little braking components, such as the flow and cooling requirement of Retarder, electromagnetic clutch combine, electric control pump full-speed operation；
When cooling-water temperature transmitter, oil temperature sensor, EGR temperature sensor etc. break down, it is complete also to trigger electric control pump
Speed operating.
Second aspect, the embodiment of the present invention additionally provide a kind of engine thermal management control dress based on two fast electric control pumps
To put, realized based on engine thermal management control method described above, the device is used for when electric control pump is placed in two fast modes,
Obtained according to engine speed and load factor and each regulation and control subelement
As seen from the above, engine thermal management and control device provided in an embodiment of the present invention is started based on described above
Machine heat management control method is realized, thus can solve same technical problem, and obtains identical technique effect, herein no longer
Repeat one by one.
In summary, the actual demand of combination of embodiment of the present invention diesel engine and the actual working state of two fast electric control pumps,
It is proposed feasible control strategy.For multiple thermal management requirements of engine, equal weight is all thought in the embodiment of the present invention
Will, each thermal management requirements can individually control the rotating speed of water pump, and guarantee meets each thermal management requirements.For example, engine start
When, coolant temperature is relatively low, oil temperature is relatively low, temperature is more low after temperature cooling after EGR coolings, is unsatisfactory for the electric control pump
The condition of full-speed operation, then the electric control pump is arranged to half-speed operation, accelerates the warming-up process of engine, it is cold to reduce engine
State is worn and discharge.
In addition, in practical application, present invention increase mechanical water pump connection selecting switch, thermostat selecting switch, EGR coolings
Selecting switch, warm wind open selecting switch, are user-friendly.
Finally, when various temperature sensors break down, water pump full-speed operation, ensure engine cool effect, avoid
There is coolant, machine oil, the too high phenomenon of EGR equitemperatures, further improve engine functional reliability.
In the present invention, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or
Imply relative importance.Term " multiple " refers to two or more, is limited unless otherwise clear and definite.
Although being described in conjunction with the accompanying embodiments of the present invention, those skilled in the art can not depart from this hair
Various modifications and variations are made in the case of bright spirit and scope, such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (9)
- A kind of 1. engine thermal management control method based on two fast electric control pumps, it is characterised in that including：When electric control pump is placed in two fast modes, obtained according to engine speed and load factor and each regulation and control subelement controlled Electric control pump is arranged to half-speed operation or full-speed operation by parameter；Wherein, when controlled parameter is ECT, the control method includes：Described electric control pump coolant design temperature in full-speed operation is obtained according to engine speed and load factor；The coolant design temperature is modified according to environmental air pressure to obtain amendment design temperature；When the actual temperature of the coolant design temperature and is higher than thermostat standard-sized sheet design temperature higher than amendment, or in the cooling When the actual temperature of liquid opens design temperature higher than amendment design temperature and at the beginning of being higher than thermostat, the electric control pump is arranged at full speed Operating；When the actual temperature of the coolant design temperature and is less than thermostat standard-sized sheet design temperature less than amendment, or in the cooling When the actual temperature of liquid opens design temperature less than amendment design temperature and at the beginning of being less than thermostat, the electric control pump is arranged to Half Speed Operating.
- 2. engine thermal management control method according to claim 1, it is characterised in that when controlled parameter is that engine is cold But Hysteresis control is used when liquid temperature is spent, the control method includes：Described electric control pump coolant design temperature in full-speed operation is obtained according to engine speed and load factor；The coolant design temperature is modified according to environmental air pressure to obtain amendment design temperature；When the actual temperature of the coolant is higher than amendment design temperature and the first compensation rate sum and higher than the setting of thermostat standard-sized sheet When temperature and the first compensation rate sum, or the coolant actual temperature higher than amendment design temperature and the first compensation rate it When just opening design temperature and the first compensation rate sum with and higher than thermostat, the electric control pump is arranged to full-speed operation；When the actual temperature of the coolant higher than amendment design temperature and is less than thermostat standard-sized sheet design temperature and the first compensation rate Sum, or open design temperature and the first benefit higher than amendment design temperature and at the beginning of being less than thermostat in the actual temperature of the coolant The amount of repaying sum, or coolant actual temperature less than amendment design temperature and the second compensation rate difference when, by the electric control pump It is arranged to half-speed operation.
- 3. the engine thermal management control method according to claims 1 or 2, it is characterised in that the thermostat standard-sized sheet Design temperature is fixed temperature, or is obtained according to engine speed and load factor inquiry MAP；Wherein, MAP refers to, according to hair The default controlled parameter output table of motivation particular state.
- 4. engine thermal management control method according to claim 3, it is characterised in that when controlled parameter is engine machine During oil temperature, the control method includes：Obtaining engine motor oil according to engine speed and load factor allows to set operating temperature；If engine motor oil actual temperature allows to set operating temperature higher than machine oil, the electric control pump is arranged to transport at full speed Turn；It is if engine motor oil actual temperature allows the difference of setting operating temperature and the 3rd compensation rate less than machine oil, this is automatically controlled Water pump is arranged to half-speed operation；If engine motor oil actual temperature less than machine oil allow set operating temperature and higher than machine oil allow set operating temperature with During the difference of the 3rd compensation rate, the operating condition of electric control pump is maintained.
- 5. engine thermal management control method according to claim 4, it is characterised in that when controlled parameter is urea box temperature When spending, the control method includes：Thermostat is obtained according to engine speed and load factor and just opens design temperature；When engine coolant actual temperature just opens the difference of design temperature and the 4th compensation rate or higher than fixation higher than thermostat Thermostat just opens the difference of temperature and the 4th compensation rate, and when urea box temperature is less than the urea box design temperature, this is automatically controlled Water pump is arranged to full-speed operation；When engine coolant actual temperature just opens the difference of design temperature and the 4th compensation rate or higher than fixation higher than thermostat Thermostat just opens the difference of temperature and the 4th compensation rate, and when urea box temperature is higher than the urea box design temperature, this is automatically controlled Water pump is arranged to half-speed operation；When engine coolant actual temperature just opens the difference of design temperature and the 4th compensation rate or less than fixation less than thermostat When thermostat just opens the difference of temperature and the 4th compensation rate, the electric control pump is arranged to half-speed operation.
- 6. engine thermal management control method according to claim 5, it is characterised in that when controlled parameter is followed again for exhaust During ring EGR temperature, the control method includes：When EGR actual temperatures are higher than EGR design temperatures, the electric control pump is arranged to full-speed operation；If EGR actual temperatures are less than the difference of EGR actual temperatures and the 5th compensation rate, the electric control pump is arranged to Half Speed fortune Turn；If EGR actual temperatures are less than EGR actual temperatures less than EGR design temperatures and higher than EGR actual temperatures and the 5th compensation rate Difference when, maintain the operating condition of electric control pump.
- 7. engine thermal management control method according to claim 6, it is characterised in that when controlled parameter is warm air temperature When, the control method includes：When air-conditioning opening has warm wind demand and ECT is higher than air-conditioning heating water temperature, the electric control pump is set For full-speed operation.
- 8. engine thermal management control method according to claim 7, it is characterised in that when engine overruns, engine In auxiliary braking state, cooling-water temperature transmitter failure, oil temperature sensor failure or EGR temperature sensor fault In one or more when, the electric control pump is arranged to full-speed operation, with ensure engine work reliability.
- A kind of 9. engine thermal management and control device based on two fast electric control pumps, based on described in claim 1~8 any one Engine thermal management control method realize, it is characterised in that the device be used for when electric control pump is placed in two fast modes, according to The controlled parameter that engine speed and load factor and each regulation and control subelement obtain by electric control pump be arranged to half-speed operation or Full-speed operation.
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| CN201610013036.2A CN105569803B (en) | 2016-01-08 | 2016-01-08 | Engine thermal management control method and device based on two fast electric control pumps |
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| CN201610013036.2A CN105569803B (en) | 2016-01-08 | 2016-01-08 | Engine thermal management control method and device based on two fast electric control pumps |
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| CN105569803B true CN105569803B (en) | 2018-01-30 |
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| CN108930581A (en) * | 2018-06-25 | 2018-12-04 | 嘉兴兴涛汽车零部件有限公司 | A kind of commercial vehicle water pump differential control system |
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| US10119455B2 (en) | 2016-09-13 | 2018-11-06 | Caterpillar Inc. | Method and system for detecting thermostat failure in an engine cooling system |
| CN112049718B (en) * | 2019-06-05 | 2022-04-05 | 丰疆智能科技股份有限公司 | Cooling control system for agricultural machine and cooling control method thereof |
| CN110259567B (en) * | 2019-06-29 | 2020-11-03 | 潍柴动力股份有限公司 | Control method and system for two-speed electromagnetic clutch water pump |
| CN112555010B (en) * | 2019-09-25 | 2023-04-07 | 北京京东乾石科技有限公司 | Temperature control method, device and system for aviation piston engine |
| CN112746891A (en) * | 2019-10-31 | 2021-05-04 | 日立汽车系统(苏州）有限公司 | Engine coolant control system and engine coolant control method |
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| CN105569803A (en) | 2016-05-11 |
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