CN109855882A - Automobile power assembly test coolant temperature control method and device - Google Patents
Automobile power assembly test coolant temperature control method and device Download PDFInfo
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- CN109855882A CN109855882A CN201811648292.4A CN201811648292A CN109855882A CN 109855882 A CN109855882 A CN 109855882A CN 201811648292 A CN201811648292 A CN 201811648292A CN 109855882 A CN109855882 A CN 109855882A
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- cooling medium
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- temperature
- heat exchanger
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Abstract
The present invention relates to a kind of automobile power assembly test coolant temperature control method and device, wherein, the automobile power assembly test coolant temperature control method includes: to change the first cooling medium to enter the uninterrupted of heat exchanger, to control the temperature at T1；Change the temperature of the second cooling medium of measured piece by heat exchanger, to control temperature of second cooling medium at T3.The temperature for entering the first cooling medium of heat exchanger by controlling, makes it higher than the zero temperature of the second cooling medium of measured piece, so that heat exchanger be prevented to be in the presence of freezing.Meanwhile the temperature of the temperature and T1 at T3 improves control precision by PLC controller linkage control.
Description
Technical field
The present invention relates to automobile power assembly experimental fields, test in particular to a kind of automobile power assembly with cold
But medium temperature control method and device.
Background technique
Automobile power assembly laboratory usually provides a variety of cooling mediums: cooling water (is cooled down) by cooling tower, 7 DEG C of freezings
Water and ultralow temperature cooling water.Rack is tested with power assembly and is gone with ultralow temperature cooling water major part temperature at -30 DEG C at present
The development of industry, power assembly laboratory have the tendency that further decreasing to the temperature requirement of ultralow temperature cooling water.Such as with -50 DEG C
The cooling water of rank substitutes -30 DEG C of cooling water.Due to further decreasing for coolant temperature, current power assembly rack
Various temperature control devices (engine coolant temperature control, motor coolant liquid temperature control, engine motor oil temperature control, transmission oil temperature control,
In cold temperature control, fuel oil temperature control etc.) do not adapt to ultralow temperature cooling water, will lead to the heat exchanger freezing in temperature control device.
Summary of the invention
The object of the present invention is to provide a kind of automobile power assembly test coolant temperature control method and device.
To achieve the goals above, technical solution used in the embodiment of the present invention is as follows:
The embodiment of the invention provides a kind of automobile power assembly test coolant temperature control methods, comprising: changes
Become the uninterrupted that the first cooling medium enters heat exchanger, to control the temperature at T1；
Change the temperature of the second cooling medium of measured piece by heat exchanger, thus to the second cooling medium at T3
Temperature controlled.
In preferred embodiments of the present invention,
The method for changing the first cooling medium uninterrupted for entering heat exchanger includes:
First cooling medium respectively enters first circulation and second circulation；
First cooling medium enters the uninterrupted of first circulation and second circulation by changing opening for two regulating valves
Degree changes.
In preferred embodiments of the present invention, first cooling medium enters the ratio of first circulation and second circulation
The method that aperture by changing two regulating valves changes is executed by PLC controller.
In preferred embodiments of the present invention,
The first circulation successively includes first circulation pump, check valve and heat exchanger according to loop direction；
The second circulation successively include according to loop direction the first cooling medium water inlet, heat exchanger, first circulation pump,
Two regulating valves and the water outlet of the first cooling medium；
The PLC controller changes the first cooling medium into first circulation by changing the aperture of two regulating valves
Uninterrupted, to control the temperature at T1.
In preferred embodiments of the present invention, the temperature of the cooling medium for changing measured piece by heat exchanger
Method includes；
Second cooling medium respectively enters third circulation and the 4th circulation；
Second cooling medium enters the ratio of third circulation and the 4th circulation by changing opening for three-way control valve
It spends to change to change the temperature of the second cooling medium.
In preferred embodiments of the present invention, the second medium enters third circulation and the ratio of the 4th circulation passes through
The method for changing the aperture of three-way control valve to change is realized by PLC controller.
In preferred embodiments of the present invention,
The third circulation successively includes the water inlet of the second cooling medium, second circulation pump, threeway adjusting according to loop direction
Valve, heater and the water outlet of the second cooling medium；
4th circulation successively includes the water inlet of the second cooling medium, second circulation pump, threeway adjusting according to loop direction
Valve and heat exchanger and the water outlet of the second cooling medium；
The PLC controller by change three-way control valve aperture come change into third circulation and the 4th circulation
Ratio, to control temperature of second cooling medium at T3.
In preferred embodiments of the present invention, the temperature at temperature and T3 at T1 meets following constraint condition；
Parameter definition is as follows:
Temperature at T1_target, T1；
Temperature at T3_target, T3；
The fiducial temperature of A, T3_target and T1_target；
B, the freezing point temperature of the second cooling medium；
Constraint condition is as follows:
T1_target=T3_target-A；
T1_target≥B+5℃；
T1_target≤0℃。
The embodiment of the invention also provides a kind of automobile power assembly test coolant temperature control devices, including；
Heat exchanger, two-way ratio adjusting valve, the first cooling medium, the second cooling medium；
The two-way ratio adjusting valve is suitable for changing the uninterrupted that the first cooling medium enters heat exchanger, thus to T1
The temperature at place is controlled；
The heat exchanger is suitable for changing the temperature of the second cooling medium of measured piece, thus to the second cooling medium in T3
The temperature at place is controlled.
In preferred embodiments of the present invention, the automobile power assembly test coolant temperature control device includes
First circulation and second circulation；
The first circulation successively includes first circulation pump, check valve and heat exchanger according to loop direction；
The second circulation successively include according to loop direction the first cooling medium water inlet, heat exchanger, first circulation pump,
Two regulating valves and the water outlet of the first cooling medium；
The two regulating valves are suitable for through PLC controller control aperture, to change into the first cold of first circulation
But the uninterrupted of medium, to control the temperature at T1.
Compared with the existing technology, the embodiment of the present invention has the advantages that
The embodiment of the invention provides a kind of automobile power assembly test coolant temperature control method and device,
In, the automobile power assembly test coolant temperature control method includes: to change the first cooling medium to enter heat exchange
The uninterrupted of device, to control the temperature at T1；Change the second cooling medium of measured piece by heat exchanger
Temperature, to control temperature of second cooling medium at T3.Enter the first cooling of heat exchanger by controlling
The temperature of medium, makes it higher than the zero temperature of the second cooling medium of measured piece, to prevent heat exchanger from occurring freezing
Situation.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 shows automobile power assembly test coolant temperature control device provided by the embodiment of the present invention
Structural schematic diagram.
Fig. 2 shows automobile power assembly test coolant temperature control methods provided by the embodiment of the present invention
Flow chart.
In figure: 110- first circulation pump；120- check valve；130- two regulating valves；140- second circulation pump；150- threeway
Regulating valve；
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
Embodiment
It is filled referring to Fig. 1, being controlled the embodiment of the invention provides a kind of automobile power assembly test with coolant temperature
It sets.Automobile power assembly test coolant temperature control device includes；It is heat exchanger, two-way ratio adjusting valve, first cold
But medium；The two-way ratio adjusting valve is suitable for changing the uninterrupted that the first cooling medium enters heat exchanger, thus to T1
The temperature at place is controlled；The heat exchanger is suitable for changing the temperature of the second cooling medium of measured piece, thus cold to second
But temperature of the medium at T3 is controlled.It is greater than the freezing point temperature of the second cooling medium of measured piece by the temperature at control T1
Degree, eliminates the risk of heat exchanger freezing.
Specifically, the automobile power assembly test coolant temperature control device includes first circulation and second
Circulation；The first circulation successively includes first circulation pump 110, check valve 120 and heat exchanger according to loop direction；It is described
Second circulation successively includes the first cooling medium water inlet, heat exchanger, first circulation pump 110, two-way adjusting according to loop direction
Valve 130 and the water outlet of the first cooling medium；The two regulating valves 130 are suitable for controlling aperture by PLC controller, to change
Into the uninterrupted of the first cooling medium of first circulation, to control the temperature at T1.PLC controller and two-way
Regulating valve 130 is electrically connected, and the proportionate relationship of the aperture and the temperature at T1 of two regulating valves 130 is obtained by experimental data.
In the present embodiment, the automobile power assembly test coolant temperature control device further includes third circulation
And the 4th circulation.Second cooling medium respectively enters third circulation and the 4th circulation；Second cooling medium enters the
The ratio of three circulations and the 4th circulation changes to change the second cooling medium by changing the aperture of three-way control valve 150
Temperature.Wherein, the aperture of three-way control valve 150 is controlled by PLC controller.
Specifically, the third circulation successively includes the water inlet of the second cooling medium, second circulation pump according to loop direction
140, three-way control valve 150, heater and the water outlet of the second cooling medium；4th circulation according to loop direction successively includes
The water inlet of second cooling medium, second circulation pump 140, three-way control valve 150 and heat exchanger and the water outlet of the second cooling medium；
The PLC controller changes the ratio into third circulation and the 4th circulation by changing the aperture of three-way control valve 150,
To control temperature of second cooling medium at T3.To realize the temperature to the second cooling medium in cold-point temperature
To 100 DEG C of control.The work of heater is controlled by PLC controller.
In the present embodiment, first circulation water pump, second circulation water pump are controlled by PLC controller.
In the present embodiment, the water inlet of the second cooling medium and the water outlet of the second cooling medium are connected to expansion tank, are prevented
It is only tested cooling medium when heated, due to water volume increase caused by expanding with heat and contract with cold, the situations such as pipe bursting is caused to occur.
It is controlled referring to Fig. 2, the embodiment of the invention also provides a kind of automobile power assembly tests with coolant temperature
Method.Automobile power assembly test coolant temperature control method includes: to change the first cooling medium to enter heat exchanger
Uninterrupted, to control the temperature at T1；Change the second cooling medium of measured piece by heat exchanger
Temperature, to control temperature of second cooling medium at T3.Pass through the of temperature greater than measured piece at the place control T1
The freezing point temperature of two cooling mediums eliminates the risk of heat exchanger freezing.
Wherein, the method for changing the uninterrupted that the first cooling medium enters heat exchanger includes: first cooling Jie
Matter respectively enters first circulation and second circulation；First cooling medium enters first circulation and the ratio of second circulation passes through
The aperture for changing two regulating valves 130 changes.
Specifically, the ratio that first cooling medium enters first circulation and second circulation is adjusted by changing two-way
The method that the aperture of valve 130 changes is executed by PLC controller.In the present embodiment, the first circulation is according to loop direction
It successively include first circulation pump 110, check valve 120 and heat exchanger；The second circulation successively includes according to loop direction
First cooling medium water inlet, heat exchanger, first circulation pump 110, two regulating valves 130 and the water outlet of the first cooling medium；Institute
PLC controller is stated by changing the aperture of two regulating valves 130 to change the flow into the first cooling medium of first circulation
Size, to control the temperature at T1.Wherein, the corresponding relationship of the temperature at T1 and the aperture of two-way ratio adjusting valve
It is obtained by experiment.
In the present embodiment, the method for the temperature of the cooling medium for changing measured piece by heat exchanger includes；
Second cooling medium respectively enters third circulation and the 4th circulation；Second cooling medium enters third circulation and the 4th
The ratio of circulation changes to change the temperature of the second cooling medium by changing the aperture of three-way control valve 150.Wherein, institute
It states second medium and enters the side that third recycles and the ratio of the 4th circulation changes by changing the aperture of three-way control valve 150
Method is executed by PLC controller.
Specifically, the third circulation successively includes the water inlet of the second cooling medium, second circulation pump according to loop direction
140, three-way control valve 150, heater and the water outlet of the second cooling medium；4th circulation according to loop direction successively includes
The water inlet of second cooling medium, second circulation pump 140, three-way control valve 150 and heat exchanger and the water outlet of the second cooling medium；
The PLC controller changes the ratio into third circulation and the 4th circulation by changing the aperture of three-way control valve 150,
To control temperature of second cooling medium at T3.
In the present embodiment, the temperature at T1 and the temperature at T3 meet following constraint condition；
Parameter definition is as follows:
Temperature at T1_target, T1；
Temperature at T3_target, T3；
The fiducial temperature of A, T3_target and T1_target；
B, the freezing point temperature of the second cooling medium；
Constraint condition is as follows:
T1_target=T3_target-A；
T1_target≥B+5℃；
T1_target≤0℃。
That is, PLC controller control T1_target and T3_target-A links, thus prevent, the temperature ratio T3's at T1
Target value it is too many, will lead to three-way control valve 150 and slightly act the fluctuation for a little resulting in T3_target, influence T3_
The precision of target control.
In conclusion the embodiment of the present invention provide a kind of automobile power assembly test coolant temperature control method and
Device, wherein the automobile power assembly test coolant temperature control method includes: to change the first cooling medium to enter
The uninterrupted of heat exchanger, to control the temperature at T1；Change measured piece by heat exchanger second is cold
But the temperature of medium, to control temperature of second cooling medium at T3.Enter the of heat exchanger by controlling
The temperature of one cooling medium makes it higher than the zero temperature of the second cooling medium of measured piece, to prevent heat exchanger from occurring
The situation of icing.Meanwhile the temperature of the temperature and T1 at T3 improves control precision by PLC controller linkage control.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.The foregoing is merely this
The preferred embodiment of invention, is not intended to restrict the invention, and for those skilled in the art, the present invention can have
Various modifications and variations.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on, should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of automobile power assembly test coolant temperature control method, which is characterized in that the automobile power assembly
Test coolant temperature control method includes:
Change the uninterrupted that the first cooling medium enters heat exchanger, to control the temperature at T1；
Change the temperature of the second cooling medium of measured piece by heat exchanger, thus the temperature to the second cooling medium at T3
Degree is controlled.
2. automobile power assembly test coolant temperature control method as described in claim 1, which is characterized in that
The method for changing the first cooling medium uninterrupted for entering heat exchanger includes:
First cooling medium respectively enters first circulation and second circulation；
The uninterrupted that first cooling medium enters first circulation and second circulation is changed by changing the aperture of two regulating valves
Become.
3. automobile power assembly test coolant temperature control method as claimed in claim 2, which is characterized in that
First cooling medium enters the uninterrupted of first circulation and second circulation by changing opening for two regulating valves
The method changed is spent to execute by PLC controller.
4. automobile power assembly test coolant temperature control method as claimed in claim 3, which is characterized in that
The first circulation successively includes first circulation pump, check valve and heat exchanger according to loop direction；
The second circulation successively includes the first cooling medium water inlet, heat exchanger, first circulation pump, two-way according to loop direction
Regulating valve and the water outlet of the first cooling medium；
The PLC controller changes the stream into the first cooling medium of first circulation by changing the aperture of two regulating valves
Size is measured, to control the temperature at T1.
5. automobile power assembly test coolant temperature control method as described in claim 1, which is characterized in that described
The method for changing the temperature of the cooling medium of measured piece by heat exchanger includes；
Second cooling medium respectively enters third circulation and the 4th circulation；
Second cooling medium enter third circulation and the 4th circulation ratio by change three-way control valve aperture come
Change to change the temperature of the second cooling medium.
6. automobile power assembly test coolant temperature control method as claimed in claim 5, which is characterized in that described
It is logical that second medium enters the method that third recycles and the ratio of the 4th circulation changes by changing the aperture of three-way control valve
Cross PLC controller execution.
7. automobile power assembly test coolant temperature control method as claimed in claim 6, which is characterized in that
The third circulation successively includes the water inlet of the second cooling medium according to loop direction, second circulation pump, three-way control valve, adds
Hot device and the water outlet of the second cooling medium；
4th circulation according to loop direction successively include the water inlet of the second cooling medium, second circulation pump, three-way control valve with
And heat exchanger and the second cooling medium are discharged；
The PLC controller changes the ratio into third circulation and the 4th circulation by changing the aperture of three-way control valve
Example, to control temperature of second cooling medium at T3.
8. automobile power assembly test coolant temperature control method as described in claim 1, which is characterized in that
The temperature at temperature and T3 at T1 meets following constraint condition；
Parameter definition is as follows:
Temperature at T1_target, T1；
Temperature at T3_target, T3；
The fiducial temperature of A, T3_target and T1_target；
B, the freezing point temperature of the second cooling medium；
Constraint condition is as follows:
T1_target=T3_target-A；
T1_target≥B+5℃；
T1_target≤0℃。
9. a kind of automobile power assembly test coolant temperature control device, which is characterized in that including；
Heat exchanger, two-way ratio adjusting valve, the first cooling medium, the second cooling medium；
The two-way ratio adjusting valve is suitable for changing the uninterrupted that the first cooling medium enters heat exchanger, thus to T1
Temperature is controlled；
The heat exchanger is suitable for changing the temperature of the second cooling medium of measured piece, thus to the second cooling medium at T3
Temperature is controlled.
10. automobile power assembly test coolant temperature control device as claimed in claim 9, which is characterized in that institute
Stating automobile power assembly test coolant temperature control device includes first circulation and second circulation；
The first circulation successively includes first circulation pump, check valve and heat exchanger according to loop direction；
The second circulation successively includes the first cooling medium water inlet, heat exchanger, first circulation pump, two-way according to loop direction
Regulating valve and the water outlet of the first cooling medium；
The two regulating valves are suitable for controlling aperture by PLC controller, to change first cooling Jie into first circulation
The uninterrupted of matter, to control the temperature at T1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811648292.4A CN109855882A (en) | 2018-12-30 | 2018-12-30 | Automobile power assembly test coolant temperature control method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811648292.4A CN109855882A (en) | 2018-12-30 | 2018-12-30 | Automobile power assembly test coolant temperature control method and device |
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| CN109855882A true CN109855882A (en) | 2019-06-07 |
Family
ID=66893712
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| CN201811648292.4A Pending CN109855882A (en) | 2018-12-30 | 2018-12-30 | Automobile power assembly test coolant temperature control method and device |
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Cited By (2)
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| CN110361191A (en) * | 2019-07-30 | 2019-10-22 | 苏州英特模汽车科技有限公司 | A kind of efficient test macro and its test method of electric drive axle power assembly |
| CN113984316A (en) * | 2021-12-24 | 2022-01-28 | 苏州英特模汽车科技有限公司 | Automobile part pressure pulsation test device |
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