CN105276029B - The determination method and device of wet clutch surface temperature - Google Patents
The determination method and device of wet clutch surface temperature Download PDFInfo
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- CN105276029B CN105276029B CN201410293131.3A CN201410293131A CN105276029B CN 105276029 B CN105276029 B CN 105276029B CN 201410293131 A CN201410293131 A CN 201410293131A CN 105276029 B CN105276029 B CN 105276029B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000012530 fluid Substances 0.000 claims abstract description 78
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- 238000003825 pressing Methods 0.000 claims description 18
- 239000011717 all-trans-retinol Substances 0.000 claims description 12
- 235000019169 all-trans-retinol Nutrition 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
A kind of determination method and device of wet clutch surface temperature.Methods described includes：Calculate current period in because of friction and caused by heat JC(k)；Calculate and the heat J that the fluid of the wet clutch is absorbed is flowed into current periodLC(k)；Calculate the heat J that the wet clutch component of itself is distributed in current periodCON(k)；According to first difference, the variable quantity of the wet clutch surface temperature in current period is calculated；Work as k>When 1, according to the variable quantity of the wet clutch surface temperature in the temperature on the wet clutch surface in the previous cycle and current period, the temperature T on the wet clutch surface in current period is calculatedC(k)；As k=1, according to the variable quantity of the wet clutch surface temperature in the initial temperature of the wet clutch detected and current period, the temperature T on the wet clutch surface in current period is calculatedC(k).The temperature on the wet clutch surface can be more accurately determined using methods described.
Description
Technical field
The present invention relates to wet clutch field, and in particular to the determination method and dress of a kind of wet clutch surface temperature
Put.
Background technology
In the transmission system of automobile, clutch is responsible for cut-out and engagement engine between engine and speed changer
Power, it is ensured that smooth-going when steady during vehicle starting and gearshift.Under normal circumstances, clutch can be divided into dry type
Clutch and wet clutch.Wherein, dry clutch cools down the temperature on its surface using air, and wet clutch is adopted
The temperature on its surface is cooled down with fluid.
In the starting of automobile or shift process, clutch needs the power of engagement engine, to complete rising for automobile
Step or gearshift.But due to speed difference between engine and clutch be present, the speed difference cause clutch and engine it
Between and clutch inside rub between associated components, cause the temperature of clutch surface drastically to raise, especially complete oily
Door starting or large throttle are forced during gearshift etc..In vehicle travel process, it usually needs know the temperature of clutch surface
Degree, and takes corresponding cooling strategy according to the temperature value known, avoid clutch due to long-time in superheat state and
Cause to fail, so as to improve the security of driving.
At present, knowing the usual way of temperature on wet clutch surface is：In a certain position in wet clutch surface
Place sets temperature inductor, and the temperature value sensed according to the temperature inductor determines the temperature on the wet clutch surface
Degree.
However, in above-mentioned way, the temperature inductor can only sense described some position of wet clutch surface
The temperature value at place, rather than the temperature that the wet clutch surface is overall, therefore, wet clutch are determined using the above method
The temperature on surface is not accurate enough.
The content of the invention
The embodiment of the present invention solves the problems, such as it is how more accurately to determine the temperature on wet clutch surface.
To solve the above problems, the embodiment of the present invention provides a kind of determination method of wet clutch surface temperature, it is described
Method includes：
Calculate in current period between the wet clutch and engine and inside the wet clutch because of friction
And caused heat JC(k), k represents that current period is k-th of cycle；
Calculate and the heat J that the fluid of the wet clutch is absorbed is flowed into current periodLC(k)；
Calculate the heat J that the wet clutch component of itself is distributed in current periodCON(k)；
By the heat JC(k) the heat J is subtractedLCAnd J (k)CON(k) sum, the first difference is obtained, according to described
One difference, calculate the variable quantity of the wet clutch surface temperature in current period；
Work as k>When 1, according to the wet type in the temperature on the wet clutch surface in the previous cycle and current period
The variable quantity of clutch surface temperature, calculate the temperature T on the wet clutch surface in current periodC(k)；As k=1,
According to the change of the wet clutch surface temperature in the initial temperature of the wet clutch detected and current period
Change amount, calculate the temperature T on the wet clutch surface in current periodC(k)。
Alternatively, described calculate in current cycle between the wet clutch and engine because of friction and caused by heat
JC(k), including：
Obtain the value Tq (k) of the moment of torsion that the wet clutch is transmitted in current period；
Obtain the rotating speed of the wet clutch driving disc spacing pressing and the rotating speed of clutch plate in current period；
Obtain the rotating speed of the wet clutch driving disc spacing pressing and the rotating speed of clutch plate in current period；
Quadratured in time as described using the value Tq (k) of the moment of torsion and the second difference DELTA ω (k) product
Heat JC(k) value.
Alternatively, described calculate flows into the heat J that the fluid of the wet clutch is absorbed in current periodLC(k), wrap
Include：
Obtain the temperature T when fluid in current period flows into the wet clutchin(k)；
Obtain the flow L (k) for the fluid that the wet clutch is flowed into current period；
With the temperature TC(k) with the temperature Tin(k) difference between is quadratured in time, then with the flow L
(k) absorb heat adjusted coefficient K with default fluidLCProduct be multiplied, as the heat JLC(k) value.
Alternatively, the wet clutch is wet-type dual-clutch, and the fluid flows into from the first wet clutch, from
Two wet clutches flow out, and it is determined that during the second wet clutch surface temperature, it is wet to flow into described first with the fluid
The value J for the heat that formula clutch is absorbedLC1(k) the flow L (k) with the fluid and default oil liquid temperature adjusted coefficient KLW
Product ratio, then with flow into first wet clutch when fluid temperature Tin1(k) sum, as in current period
The fluid flows into temperature T during second wet clutchin2(k)。
Alternatively, it is described to calculate the heat J that the wet clutch component of itself is distributed in current periodCON(k),
Including：
The conduction parameter of the component is obtained, the conduction parameter includes：Coefficient of conductivity Con, the conducting surface of the component
Product Acon and conduction thickness Thic；
Obtain the temperature T of the component surface in current periodCON(k)；
With the temperature TC(k) with the temperature TCON(k) difference is quadratured in time, then with the conduction surface
Acon is multiplied with conducting thickness Thic ratio with coefficient of conductivity Con product, as the heat JCON(k) value.
Alternatively, the wet clutch component of itself includes：The platen of support and setting on the bracket, institute
State heat JCON(k) value is equal to the heat sum that the heat that the platen is distributed is distributed with the support.
Alternatively, it is described according to first difference, calculate the change of the wet clutch surface temperature in current period
Change amount, including：
Obtain the specific heat C of the wet clutchp；
Obtain the mass M of the wet clutchc；
With first difference and the specific heat CpWith mass McProduct ratio, as described in the current period
The variable quantity of wet clutch surface temperature.
The embodiment of the present invention additionally provides a kind of determining device of wet clutch surface temperature, and described device includes：
First computing unit, for calculating in current period between the wet clutch and engine and the wet type
Inside clutch because of friction and caused by heat JC(k), k represents that current period is k-th of cycle；
Second computing unit, the heat J that the fluid of the wet clutch is absorbed is flowed into current period for calculatingLC
(k)；
3rd computing unit, for calculating the heat that the wet clutch component of itself is distributed in current period；
4th computing unit, for by the heat JC(k) the heat J is subtractedLCAnd J (k)CON(k) sum, is obtained
One difference；
5th computing unit, for according to first difference, calculating wet clutch surface temperature in current period
The variable quantity of degree；
6th computing unit, in k>When 1, according to the temperature on the wet clutch surface in the previous cycle and work as
The variable quantity of the temperature on the wet clutch surface in the preceding cycle, calculate the temperature on the wet clutch surface in current period
Spend TC(k)；And in k=1, according to described wet in the initial temperature of the wet clutch detected and current period
The variable quantity of formula clutch surface temperature, calculate the temperature T on the wet clutch surface in current periodC(k)。
Alternatively, first computing unit includes：
First obtains subelement, for obtaining the value Tq (k) of the moment of torsion that the wet clutch is transmitted in current period；
Second obtains subelement, for obtaining the rotating speed of the wet clutch driving disc spacing pressing and clutch plate in current period
Rotating speed；
First computation subunit, for calculating the difference between the rotating speed of the driving disc spacing pressing and the rotating speed of clutch plate, obtain
Second difference DELTA ω (k)；
Second computation subunit, for the value Tq (k) of the moment of torsion and the second difference DELTA ω (k) product when
Between on quadrature, as the heat JC(k) value.
Alternatively, second computing unit includes：
First obtains subelement, for obtaining the temperature T when fluid in current period flows into the wet clutchin
(k)；
Second obtains subelement, for obtaining the flow L (k) of the fluid of the wet clutch in current period；
Computation subunit, for the temperature TC(k) with the temperature Tin(k) the difference quadrature in time between
Point, then absorbed heat adjusted coefficient K with the flow L (k) and default fluidLCProduct be multiplied, as the heat JLC(k)
Value.
Alternatively, the wet clutch is wet-type dual-clutch, and the fluid flows into from the first wet clutch, from
Two wet clutches flow out, and it is determined that during the second wet clutch surface temperature, described second obtains subelement with described
Fluid flows into the value J for the heat that first wet clutch is absorbedLC1(k) with the flow L (k) of the fluid with it is default
Oil liquid temperature adjusted coefficient KLWProduct ratio, then with flow into first wet clutch when fluid temperature Tin1(k) ask
With temperature T during second wet clutch is flowed into as the fluid in current periodin2(k)。
Alternatively, the 3rd computing unit includes：
First obtains subelement, and for obtaining the conduction parameter of the component, the conduction parameter includes：The component
Coefficient of conductivity Con, conduction surface Acon and conduction thickness Thic.
Second obtains subelement, for obtaining the temperature T of the component surface in current periodCON(k)；
Computation subunit, for the temperature TC(k) with the temperature TCON(k) difference is quadratured in time, then
It is multiplied with the conduction surface Acon with conducting thickness Thic ratio with coefficient of conductivity Con product, as the heat JCON
(k) value.
Alternatively, the wet clutch component of itself includes：Support and the platen being arranged on support, the heat
Measure JCON(k) value is equal to the heat sum that the heat that the platen is distributed is distributed with the support.
Alternatively, the 5th computing unit includes：
First obtains subelement, for obtaining the specific heat C of the wet clutchp；
Second obtains subelement, for obtaining the mass M of the wet clutchc；
Computation subunit, for first difference and the specific heat CpWith mass McProduct ratio, as described
The variable quantity of the wet clutch surface temperature in current period.
Compared with prior art, the technical scheme of the embodiment of the present invention has advantages below：
By calculating in current period wet clutch because friction is described in heat, current period inner fluid flow through and caused by
The heat that heat that wet clutch is absorbed and the wet clutch itself component are distributed, and then can be according to first
Difference determines the variable quantity of the wet clutch surface temperature in current period, further according to the wet type clutch in the previous cycle
The variable quantity of the wet clutch surface temperature in the temperature and current period on device surface, you can obtain institute in current period
State the overall temperature in wet clutch surface, and the temperature value for some opening position that not according to temperature inductor senses determines
The bulk temperature on the wet clutch surface, therefore can more accurately determine the temperature on the wet clutch surface.
Brief description of the drawings
The determination method flow diagram of wet clutch surface temperature in Fig. 1 embodiment of the present invention；
Fig. 2 is the cross-sectional view of wet-type dual-clutch in the embodiment of the present invention；
Fig. 3 is the result schematic diagram that the method in application drawing 1 determines the wet-type dual-clutch surface temperature in Fig. 2；
Fig. 4 is the determination apparatus structure schematic diagram of wet clutch surface temperature in the embodiment of the present invention；
Fig. 5 is the structural representation of the first computing unit in the embodiment of the present invention；
Fig. 6 is the structural representation of the second computing unit in the embodiment of the present invention；
Fig. 7 is the structural representation of the 3rd computing unit in the embodiment of the present invention；
Fig. 8 is the structural representation of the 5th computing unit in the embodiment of the present invention.
Embodiment
At present, some opening position for being typically employed in wet clutch surface sets the mode of temperature inductor to determine
State the temperature on wet clutch surface.However, the temperature that the temperature inductor senses is the wet clutch surface
The temperature of a certain opening position, rather than the bulk temperature on the wet clutch surface.Therefore, the temperature inductor is sensed
Temperature it is not accurate enough as the bulk temperature on the wet clutch surface, causing subsequently can not be according to the wet clutch
The temperature on surface takes corresponding cooling strategy exactly, has a strong impact on the security of driving.
In view of the above-mentioned problems, the embodiment provides a kind of determination method of wet clutch surface temperature, institute
State method and pass through the fluid institute that calculates between wet clutch and engine heat caused by friction, flow into the wet clutch
The heat that the heat of absorption and the wet clutch itself component are distributed, and then determined according to the above-mentioned heat calculated
The bulk temperature on wet clutch surface, rather than a certain opening position of the wet clutch to sense temperature described in
The bulk temperature on wet clutch surface, therefore the temperature on the wet clutch surface can be more accurately determined, also
Corresponding cooling strategy more accurately can be taken according to the temperature on the wet clutch surface, improve the safety of driving
Property.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.
As shown in figure 1, the embodiment provides a kind of determination method of wet clutch surface temperature, the side
Method may include steps of：
Step 110：Calculate in current period between the wet clutch and engine and in the wet clutch
Portion heat J caused by because of frictionC(k), k represents that current period is k-th of cycle.
In embodiments of the invention, it is determined that during the wet clutch surface temperature, by the change of temperature
Journey is divided into several cycles, and the variable quantity of time is dt in each cycle.By calculating the wet clutch in each cycle
The temperature on surface, to determine temperature variations of the wet clutch in whole process.
Wet clutch generally includes the structures such as support, driving disc spacing pressing, friction plate, clutch plate (i.e. platen) and holddown spring
Part.Wherein, driving disc spacing pressing, friction plate, clutch plate and holddown spring are sequentially connected, and are respectively provided with the bracket.Specific
In, the driving disc spacing pressing is typically secured on the end face of engine flywheel, the input axis connection of the friction plate and speed changer.
The friction plate can be pressed on the flywheel of engine in the presence of holddown spring by the clutch plate, due to the master
Speed discrepancy between Moving plate and clutch plate be present, therefore, by the rubbing action between driving disc spacing pressing, friction plate and friction plate with from
Rubbing action between Moving plate, and then the moment of torsion sent of engine can be passed to speed changer.
As shown in the above, the heat JC(k) moment of torsion transmitted with the wet clutch, and the active
Rotating speed difference correlation between disk and clutch plate.Therefore, in specific implementation, the wet type in current period can got
After torque T q (k) and driving disc spacing pressing and the rotating speed of clutch plate that clutch is transmitted, first calculate the driving disc spacing pressing and clutch plate it
Between speed discrepancy, i.e. the second difference DELTA ω (k), further according to the second difference DELTA ω (k) and the value Tq of the moment of torsion transmitted
(k) the heat J in current period is determinedC(k).It is determined that the heat J in current periodC(k), can be by the moment of torsion when
Value Tq (k) and the second difference DELTA ω (k) product quadrature in time as the heat JC(k) value, i.e.,：
JC(K)=Tq (k) * Δ ω (k) * dt (1)
Step 120：Calculate and the heat J that the fluid of the wet clutch is absorbed is flowed into current periodLC(k)。
Wet clutch is the clutch that its surface temperature is cooled down using fluid.In specific implementation, flow into described wet
The temperature T of the fluid of formula clutchin(k) the temperature T on the wet clutch surface in the current period can be less thanC(k),
Now, the fluid cools down to the wet clutch.Flow into the temperature T of the fluid of the wet clutchin(k) also may be used
With the temperature T higher than the wet clutch surface in current periodC(k), now, the fluid enters to the wet clutch
Row heating.That is, the heat JLC(k) the temperature T of fluid of the value with flowing into the wet clutchin(k) and work as
The temperature T on the wet clutch surface in the preceding cycleC(k) it is related.
Also, in current period, it is bigger to flow into the oil mass L (k) of the fluid of the wet clutch, the fluid and institute
State the heat J that the contact area of wet clutch is bigger, and the fluid is absorbedLC(k) it is also more.Therefore, the heat JLC
(k) value is related to the value of the oil mass L (k).
In specific implementation, the temperature that the wet clutch is can be flowed into getting the fluid in current period
Tin(k) and after the flow L (k) of the fluid of the inflow wet clutch, according to the temperature Tin(k) value and described
Flow L (k) value, determine the heat JLC(k) value.It is determined that the heat JLC(k), can be by the temperature T during valueC
(k) with the temperature Tin(k) difference is quadratured in time, then is with the flow L (k) and the heat absorption amendment of default fluid
Number KLCProduct be multiplied, as the heat JLC(k) value, i.e.,：
JLC(k)=(TC(k)-Tin(k))*L(k)*KLC*dt (2)
It should be noted that in specific implementation, the default fluid heat absorption adjusted coefficient KLCFinite element can be passed through
Model or experiment obtain.For example pass through FEM model, the K of acquisitionLCValue be 0.8.Pass through KLCValue can be to the heat
JLC(k) value is modified, to cause the heat JLC(k) value is more accurate.
Step 130：Calculate the heat J that the wet clutch component of itself is distributed in current periodCON(k)。
As described above, the wet clutch can include the components such as support and platen.During concrete application,
In addition to fluid except flowing into the wet clutch can absorb heat, itself component of the wet clutch is in heat transfer
During, it is also possible to distribute partial heat.For example the support may distribute heat in heat transfer, the platen is passing
Heat may also can be distributed when leading, other components of the wet clutch may also can distribute heat.But due to it is described other
The heat that component distributes is smaller, in embodiments of the invention, the heat J that is distributed with the supportCON1(k) and platen distributes
Heat JCON2(k) the heat J that sum is distributed as the wet clutch component of itselfCON(k), i.e.,：
JCON(k)=JCON1(k)+JCON2(k) (3)
Because itself component of the wet clutch is that heat is distributed during heat transfer, therefore, each component
The heat distributed is related to the conduction parameter of the component.Wherein, the conduction parameter can include coefficient of conductivity Con, pass
Guide face accumulates the parameter such as Acon and conduction thickness Thic.Wherein, the conduction thickness Thic can by limited trials or
The modes such as computer-aided engineering (Computer Aided Engineering, CAE) model are determined.
Also, because heat transfer is that heat is passed into the relatively low portion of the object temperature from object temperature higher part
Point, therefore, temperature T of the heat that each component is distributed also with the component in current periodCON(k) and the wet type from
The temperature T on clutch surfaceC(k) the temperature difference correlation between.The temperature difference is bigger, and the heat that the component is distributed also is got over
It is more.
In specific implementation, the temperature T of the conduction parameter of the component and the component surface can gotCON
(k) after, according to the value of the conduction parameter and the temperature TCON(k) value determines the heat JCON(k) value.True
The fixed JCON(k), can be by the temperature T during valueC(k) with the temperature T of the componentCON(k) difference between is in the time
On quadrature, then with the conduction surface Acon with conduct thickness Thic ratio be multiplied with coefficient of conductivity Con product, as
The heat JCON(k) value, i.e.,：
Therefore, when the component is support, heat that the support distributes：
When the component is platen, heat that the platen distributes：
Formula (5) and formula (6) are substituted into formula (3), you can obtain the component institute of the wet clutch itself
The heat J distributedCON(k) value.
Step 140：By the heat JC(k) the heat J is subtractedLCAnd J (k)CON(k) sum, the first difference, root are obtained
According to first difference, the variable quantity of the wet clutch surface temperature in current period is calculated.
When the wet clutch produces heat, fluid of the caused heat except being flowed through the wet clutch
Absorb, and beyond being distributed by itself component of the wet clutch, remaining heat causes the wet clutch table
Face temperature changes.That is, first difference causes the wet clutch surface temperature in current period
The heat of change.
When determining the temperature variation on the wet clutch surface according to first difference, due to causing object table
The heat of face temperature change is related to the variable quantity of the object temperature and the quality and specific heat of the object.Therefore, having
, can be after the mass M c and specific heat Cp of the wet clutch be got, further according to the mass M c and specific heat during body is implemented
Cp value determines the variable quantity of the wet clutch surface temperature.It is determined that the variable quantity of the wet clutch surface temperature
When, can be by first difference and the specific heat Cp and the ratio of mass M c product, as described in the current period
The variable quantity of wet clutch surface temperature, i.e.,
TC(k)-TC(k-1)=(JC(k)-JLC(k)-JCON(k))/(Cp*Mc) (7)
Formula (3) is substituted into formula (7), can be obtained：
TC(k)-TC(k-1)=(JC(k)-JLC(k)-JCON1(k)-JCON2(k))/(Cp*Mc) (8)
Step 150：Work as k>When 1, according in the temperature on the wet clutch surface in the previous cycle and current period
The variable quantity of the wet clutch surface temperature, calculate the temperature T on the wet clutch surface in current periodC(k)；When
During k=1, according to wet clutch surface temperature in the initial temperature of the wet clutch detected and current period
The variable quantity of degree, calculate the temperature T on the wet clutch surface in current periodC(k)。
After the variable quantity of temperature of the wet clutch in current period is obtained by step 140, it is also necessary to
According to the temperature T on the wet clutch surface in the previous cycleC(k-1) the wet clutch table in current period is determined
The temperature T in faceC(k).Wherein, the initial temperature T of the wet clutchC(0) can be obtained by detecting.It is described first obtaining
Beginning temperature TC(0) after, by the initial temperature TC(0) value substitutes into formula (8), it may be determined that the wet clutch was at the 1st week
The temperature T of phase inner surfaceC(1).Obtaining the temperature T of the 1st cycle inner surfaceC(1), by the temperature TC(1) value substitutes into
Formula (8), it may be determined that temperature T of the wet clutch in the 2nd cycle inner surfaceC(2) ... by that analogy, institute is being obtained
State the temperature T of -1 cycle inner surface of kthC(k-1) after, by the temperature TC(k-1) formula (8) is substituted into, you can determine k-th
The temperature on the wet clutch surface in cycle.
It should be noted that in specific implementation, the limitation of execution sequence is not present in step 110,120 and 130, as long as
Corresponding calorie value can be obtained by calculating.
It should be noted that when determining the temperature on wet clutch surface using the above method, the wet clutch
Both can be a wet clutch or wet-type dual-clutch.Below using the wet clutch as wet clutch
Exemplified by, the methods described in the embodiment of the present invention is described in detail：
As shown in Fig. 2 the wet-type dual-clutch includes first clutch 21 and second clutch 22, described first from
Clutch 21 and the junction of second clutch 22 are provided with through hole.Fluid in fuel tank flows into first wet clutch 21,
Through the through hole, second wet clutch 22 is flowed into along a directions.Flowed out along a directions from second wet clutch 22
Afterwards, then fuel tank is flowed into.Wherein, first wet clutch 21 includes support 212 and is arranged on the support 212
Platen 214.Second wet clutch 22 includes support 222 and the platen 224 being arranged on the support 222.
According to formula (1), in current period, between the first wet clutch 21 and engine and first wet type from
Inside clutch 21 because of friction and caused by heat JC1(k)=Tq1(k)*Δω1(k)*dt.Wherein, Tq1(k) it is wet for described first
The value for the moment of torsion that formula clutch 21 is transmitted, Δ ω 1 (k) are the driving disc spacing pressing of first wet clutch 21 and turning for clutch plate
Speed difference.
In current period, between the second wet clutch 22 and engine and inside of the second wet clutch 22 because
Rub and caused heat JC2(k)=Tq2(k)*Δω2(k)*dt.Wherein, Tq2(k) it is second wet type in current period
The value for the moment of torsion that clutch 22 is transmitted, Δ ω 2 (k) be current period in second wet clutch 22 driving disc spacing pressing with from
The speed discrepancy of Moving plate.
According to formula (2), in current period, the heat that the fluid of the first wet clutch 21 is absorbed is flowed into：
JLC1(k)=(TC1(k)-Tin1(k))*L(k)*KLC*dt (9)
Wherein, TC1(k) it is the temperature on the surface of the first wet clutch 21 in current period, Tin1(k) it is current period
The interior fluid flows into temperature during the first wet clutch 21.
In current period, due to the oil for flowing into first wet clutch 21 with flowing into second wet clutch 22
The flow of liquid is identical, is L (k), and the adjusted coefficient K of fluid heat absorptionLCAlso it is identical.Therefore, the second wet type clutch is flowed into
The heat that the fluid of device 22 is absorbed：
JLC2(k)=(TC2(k)-Tin2(k))*L(k)*KLC*dt (10)
Wherein, TC2(k) it is the temperature on the surface of the second wet clutch 22 in current period, Tin2(k) it is current period
The interior fluid flows into temperature during the second wet clutch 22.
In temperature Tin2(k) when, because the fluid for flowing out the first wet clutch 21 flows directly into second wet type
Clutch 22, therefore, the temperature Tin2(k) with flowing out the oil liquid temperature T of first wet clutch 21out1(k) approximate phase
Together, the temperature Tout1(k) with flowing into the oil liquid temperature T of first wet clutch 21in1And the fluid stream (k)
The heat J absorbed through first wet clutch 21LC1(k) it is related, the temperature Tout1(k) with temperature Tin1(k) between
Difference it is bigger, the heat JLC1(k) value is also bigger.Therefore can be according to the heat JLC1(k) with temperature Tin1(k)
Determine the temperature Tout1(k)., can be by the heat J in specific implementationLC1(k) with default oil liquid temperature correction factor
KLWProduct ratio, then with flow into first wet clutch when fluid temperature Tin1(k) sum, as current period
The interior fluid flows into temperature T during second wet clutchin2(k), i.e.,：
Tin2(k)=Tou1(k)=Tin1(K)+JLC1(k)/(L(k)*KLW) (11)
Formula (11) is substituted into formula (10), you can obtain and flow into the heat that the fluid of the second wet clutch 22 is absorbed
Measure JLC2(k) value.
According to formula (3), in current period, heat J that the first wet clutch 21 component of itself is distributedCON1(k)
The heat J distributed by the platen 214 of first wet clutch 21CON214(k) heat distributed with the support 212
JCON212(k) sum, i.e.,：
JCON1(k)=JCON214(k)+JCON212(k) (12)
Further according to formula (5), when the coefficient of conductivity of support 212 is Con212, conduction surface Acon212, thickness is conducted
For Thic212 when, can obtain：
According to formula (6), can obtain：
Formula (13) and formula (14) are substituted into formula (12), you can obtain heat JCON1(k) value.
Similarly, reference formula (12) to formula (14), the component institute of second wet clutch 22 itself can be obtained
The heat J distributedCON2(k), here is omitted.
According to formula (7) and the heat J obtainedC1(k)、JLC1And J (k)CON1(k) value, current week can be obtained
The variable quantity of the surface temperature of first wet clutch 21 in phase.Similarly, according to formula (7) and the heat J obtainedC2(k)、
JLC2And J (k)CON2(k) value, the variable quantity of the surface temperature of the second wet clutch 22 in current period can be obtained.
With reference to step 150, in k=1, the initial temperature of first wet clutch 21 and second wet type from
The initial temperature on the surface of clutch 22 can be obtained by detecting.Obtaining the initial temperature of first wet clutch 21
Afterwards, according to the first wet clutch that above-mentioned calculating obtains the 1st cycle internal surface temperature variable quantity, you can obtain current week
The temperature on the surface of the first wet clutch 21 in phase.Similarly, according to the initial temperature of the second wet clutch 22 and institute
Variable quantity of second wet clutch in the 1st cycle internal surface temperature is stated, the second wet clutch in current period can be obtained
The temperature on 21 surfaces.
Work as k>When 1, according to the temperature on the surface of the first wet clutch 21 in the previous cycle of above-mentioned calculating and current week
The variable quantity of the surface temperature of first wet clutch 21 in phase, can calculate obtain current period in first wet type from
The temperature on the surface of clutch 21.It similarly can also calculate the temperature for obtaining the surface of the second wet clutch 22 in current period.
Fig. 3 is the result schematic diagram of the wet-type dual-clutch surface temperature obtained using the above method.Curve 1 represents first
The situation of change of wet clutch surface temperature during starting and gearshift, curve 2 represent that the second wet clutch exists
The situation of change of surface temperature during starting and gearshift.Wherein, abscissa represents time, temperature corresponding to ordinate expression
Angle value.Ph1 represents starting-up process, and Ph2 represents shift process., can be with from figure 3, it can be seen that the method in the embodiment of the present invention
By calculating the temperature on the wet clutch surface in each cycle, to determine that the wet clutch is run in whole vehicle
The situation of change of surface temperature in journey.Due to being by calculating it is determined that during wet clutch surface temperature in each cycle
Mode is determined, rather than regard the temperature of some opening position sensed by temperature inductor as the wet clutch table
The temperature in face, therefore can more accurately obtain the temperature on the wet clutch surface, also can more accurately root
Corresponding cooling strategy is taken according to the temperature obtained, to ensure the security driven.
It is described in the method that wet clutch surface temperature is determined in the embodiment of the present invention it can be seen from the above
Wet clutch can be not only a wet clutch or wet-type dual-clutch.In specific implementation, no matter apply
Methods described determines the temperature on a wet clutch surface, is also to determine in wet-type dual-clutch each wet clutch surface
Temperature, within protection scope of the present invention.
In order that those skilled in the art more fully understand and realized embodiments of the invention, below to above-mentioned determination wet type
Device corresponding to the method for clutch surface temperature is described in detail.
As shown in figure 4, the embodiment provides a kind of determining device of wet clutch surface temperature, the dress
Put including the first computing unit 410, the second computing unit 420, the 3rd computing unit 430, the 4th computing unit the 440, the 5th meter
Calculate the computing unit 460 of unit 450 and the 6th.
Wherein, first computing unit 410 can be used for calculating the wet clutch and engine in current period
Between and the wet clutch inside because of friction and caused by heat JC(k), k represents that current period is k-th of cycle.Institute
State the second computing unit 420 and can be used for calculating the heat J that the fluid of the inflow wet clutch in current period is absorbedLC
(k).3rd computing unit 430 can be used for calculating the heat that the wet clutch component of itself is distributed in current period
Amount.4th computing unit 440 can be used for the heat JC(k) the heat J is subtractedLCAnd J (k)CON(k) sum, is obtained
One difference.5th computing unit 450 can be used for, according to first difference, calculating the wet clutch table in current period
The variable quantity of face temperature.6th computing unit 460, can be used in k>When 1, according to the wet clutch table in the previous cycle
The variable quantity of the temperature on the wet clutch surface in the temperature and current period in face, calculate the wet type in current period
The temperature T of clutch surfaceC(k)；And in k=1, according to the initial temperature of the wet clutch detected and work as
The variable quantity of the wet clutch surface temperature in the preceding cycle, calculate the temperature on the wet clutch surface in current period
TC(k)。
In specific implementation, as shown in figure 5, first computing unit 500 can include：First acquisition subelement 510,
Second obtains subelement 520, the first computation subunit 530 and the second computation subunit 540.Wherein, described first son is obtained
Unit 510 can be used for the value Tq (k) for obtaining the moment of torsion that the wet clutch is transmitted in current period.Described second obtains
Subelement 520 can be used for obtaining the rotating speed of the wet clutch driving disc spacing pressing and the rotating speed of clutch plate in current period.It is described
First computation subunit 530 can be used for calculating the difference between the rotating speed of the driving disc spacing pressing and the rotating speed of clutch plate, obtain
Two difference DELTA ω (k).Second computation subunit 540 is used for the value Tq (k) of the moment of torsion and the second difference DELTA ω
(k) product is quadratured in time, as the heat JC(k) value.
In specific implementation, as shown in fig. 6, second computing unit 600 can include：First acquisition subelement 610,
Second obtains subelement 620 and computation subunit 630.Wherein, the first acquisition subelement 610 can be used for obtaining currently
Temperature T in cycle during the fluid inflow wet clutchin(k).The second acquisition subelement 620 can be used for obtaining
Take the flow L (k) of the fluid of the wet clutch in current period.The computation subunit 630 can be used for the temperature
Spend TC(k) with the temperature Tin(k) difference between is quadratured in the time, then is absorbed heat with the flow L (k) and default fluid
Adjusted coefficient KLCProduct be multiplied, as the heat JLC(k) value.
When the wet clutch is wet-type dual-clutch, if the fluid flows into from the first wet clutch, from
Two wet clutches flow out, and it is determined that during the second wet clutch surface temperature, described second obtains subelement 620 can be with
The fluid flows into the value J for the heat that first wet clutch is absorbedLC1(k) with the flow L (k) of the fluid with it is pre-
If oil liquid temperature adjusted coefficient KLWProduct ratio, then with flow into first wet clutch when fluid temperature Tin1
(k) sum, temperature T during second wet clutch is flowed into as the fluid in current periodin2(k)。
In specific implementation, as shown in fig. 7, the 3rd computing unit 700 can include first obtain subelement 710,
Second obtains subelement 720 and computation subunit 730.Wherein, the first acquisition subelement 710 can be used for described in acquisition
The conduction parameter of component.The conduction parameter can pass to coefficient Con, conduction surface Acon and conduction including the component
Thickness Thic.The second acquisition subelement 720 can be used for the temperature T for obtaining the component surface in current periodCON(k)。
The computation subunit 730 can be used for the temperature TC(k) with the temperature TCON(k) difference is quadratured in time,
It is multiplied again with the conduction surface Acon with conducting thickness Thic ratio with coefficient of conductivity Con product, as the heat
JCON(k) value.
The wet clutch component of itself can include the platen of support and setting on the bracket.Now,
The heat JCON(k) value is equal to the heat sum that the heat that the support distributes distributes with the platen.
In specific implementation, as shown in figure 8, the 5th computing unit 800 can include：First acquisition subelement 810,
Second obtains subelement 820 and computation subunit 830.Wherein, the first acquisition subelement 810 can be used for described in acquisition
The specific heat C of wet clutchp.The second acquisition subelement 820 can be used for the mass M for obtaining the wet clutchc.Institute
Computation subunit is stated to can be used for first difference and the specific heat CpWith mass McProduct ratio, as it is described work as
The variable quantity of the wet clutch surface temperature in the preceding cycle.
It should be noted that in specific implementation, the temperature of wet clutch surface described in the embodiment of the present invention is referred to
The determination method of degree implements the determining device, and here is omitted.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
To instruct the hardware of correlation to complete by program, the program can be stored in a computer-readable recording medium, storage
Medium can include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, this is not being departed from
In the spirit and scope of invention, it can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
The scope of restriction is defined.
Claims (14)
- A kind of 1. determination method of wet clutch surface temperature, it is characterised in that including：Calculate and produced in current period between the wet clutch and engine and inside the wet clutch because of friction Raw heat JC(k), k represents that current period is k-th of cycle；Calculate and the heat J that the fluid of the wet clutch is absorbed is flowed into current periodLC(k)；Calculate the heat J that the wet clutch component of itself is distributed in current periodCON(k)；By the heat JC(k) the heat J is subtractedLCAnd J (k)CON(k) sum, the first difference is obtained, it is poor according to described first Value, calculate the variable quantity of the wet clutch surface temperature in current period；Work as k>When 1, according to the wet type clutch in the temperature on the wet clutch surface in the previous cycle and current period The variable quantity of device surface temperature, calculate the temperature T on the wet clutch surface in current periodC(k)；As k=1, according to The variable quantity of the wet clutch surface temperature in the initial temperature and current period of the wet clutch detected, Calculate the temperature T on the wet clutch surface in current periodC(k)。
- 2. the determination method of wet clutch surface temperature as claimed in claim 1, it is characterised in that described to calculate current week In phase between the wet clutch and engine because of friction and caused by heat JC(k), including：Obtain the value Tq (k) of the moment of torsion that the wet clutch is transmitted in current period；Obtain the rotating speed of the wet clutch driving disc spacing pressing and the rotating speed of clutch plate in current period；The difference between the rotating speed of the driving disc spacing pressing and the rotating speed of clutch plate is calculated, obtains the second difference DELTA ω (k)；Quadratured in time using the value Tq (k) of the moment of torsion and second difference DELTA ω (k) product and be used as the heat JC (k) value.
- 3. the determination method of wet clutch surface temperature as claimed in claim 1, it is characterised in that described to calculate current week The heat J that the fluid of the wet clutch is absorbed is flowed into phaseLC(k), including：Obtain the temperature T when fluid in current period flows into the wet clutchin(k)；Obtain the flow L (k) for the fluid that the wet clutch is flowed into current period；With the temperature TC(k) with the temperature Tin(k) difference between is quadratured in time, then with the flow L (k) and Default fluid heat absorption adjusted coefficient KLCProduct be multiplied, as the heat JLC(k) value.
- 4. the determination method of wet clutch surface temperature as claimed in claim 3, it is characterised in that the wet clutch For wet-type dual-clutch, the fluid flows into from the first wet clutch, is flowed out from the second wet clutch, it is determined that described the During two wet clutch surface temperatures, the value J for the heat that first wet clutch is absorbed is flowed into the fluidLC1(k) Flow L (k) and default oil liquid temperature adjusted coefficient K with the fluidLWProduct ratio, it is then described first wet with flowing into The temperature T of fluid during formula clutchin1(k) sum, as when the fluid flows into second wet clutch in current period Temperature Tin2(k)。
- 5. the determination method of wet clutch surface temperature as claimed in claim 1, it is characterised in that described to calculate current week The heat J that the wet clutch component of itself is distributed in phaseCON(k), including：The conduction parameter of the component is obtained, the conduction parameter includes：Coefficient of conductivity Con, the conduction surface of the component Acon and conduction thickness Thic；Obtain the temperature T of the component surface in current periodCON(k)；With the temperature TC(k) with the temperature TCON(k) difference is quadratured in time, then with the conduction surface Acon with Conduction thickness Thic ratio is multiplied with coefficient of conductivity Con product, as the heat JCON(k) value.
- 6. the determination method of wet clutch surface temperature as claimed in claim 5, it is characterised in that the wet clutch The component of itself includes：The platen of support and setting on the bracket, the heat JCON(k) value is equal to the platen The heat sum that the heat distributed is distributed with the support.
- 7. the determination method of wet clutch surface temperature as claimed in claim 1, it is characterised in that described according to described One difference, the variable quantity of the wet clutch surface temperature in current period is calculated, including：Obtain the specific heat C of the wet clutchp；Obtain the mass M of the wet clutchc；With first difference and the specific heat CpWith mass McProduct ratio, as the wet type in the current period The variable quantity of clutch surface temperature.
- A kind of 8. determining device of wet clutch surface temperature, it is characterised in that including：First computing unit, for calculating in current period between the wet clutch and engine and the wet type clutch Inside device because of friction and caused by heat JC(k), k represents that current period is k-th of cycle；Second computing unit, the heat J that the fluid of the wet clutch is absorbed is flowed into current period for calculatingLC(k)；3rd computing unit, for calculating the heat that the wet clutch component of itself is distributed in current period；4th computing unit, for by the heat JC(k) the heat J is subtractedLCAnd J (k)CON(k) sum, it is poor to obtain first Value；5th computing unit, for according to first difference, calculating the wet clutch surface temperature in current period Variable quantity；6th computing unit, in k>When 1, according to the temperature on the wet clutch surface in the previous cycle and current week The variable quantity of the temperature on the wet clutch surface in phase, calculate the temperature T on the wet clutch surface in current periodC (k)；And in k=1, according to the wet type in the initial temperature of the wet clutch detected and current period from The variable quantity of clutch surface temperature, calculate the temperature T on the wet clutch surface in current periodC(k)。
- 9. the determining device of wet clutch surface temperature as claimed in claim 8, it is characterised in that described first calculates list Member includes：First obtains subelement, for obtaining the value Tq (k) of the moment of torsion that the wet clutch is transmitted in current period；Second obtains subelement, for obtaining turn of the rotating speed of the wet clutch driving disc spacing pressing and clutch plate in current period Speed；First computation subunit, for calculating the difference between the rotating speed of the driving disc spacing pressing and the rotating speed of clutch plate, obtain second Difference DELTA ω (k)；Second computation subunit, for the value Tq (k) of the moment of torsion and the second difference DELTA ω (k) product in time Quadrature, as the heat JC(k) value.
- 10. the determining device of wet clutch surface temperature as claimed in claim 8, it is characterised in that described second calculates Unit includes：First obtains subelement, for obtaining the temperature T when fluid in current period flows into the wet clutchin(k)；Second obtains subelement, for obtaining the flow L (k) of the fluid of the wet clutch in current period；Computation subunit, for the temperature TC(k) with the temperature Tin(k) difference between is quadratured in time, then With the flow L (k) and default fluid heat absorption adjusted coefficient KLCProduct be multiplied, as the heat JLC(k) value.
- 11. the determining device of wet clutch surface temperature as claimed in claim 10, it is characterised in that the wet type clutch Device is wet-type dual-clutch, and the fluid flows into from the first wet clutch, is flowed out from the second wet clutch, it is determined that described During the second wet clutch surface temperature, described second obtains subelement flows into the first wet clutch institute with the fluid The value J of the heat of absorptionLC1(k) the flow L (k) with the fluid and default oil liquid temperature adjusted coefficient KLWProduct ratio Value, then the temperature T with fluid during inflow first wet clutchin1(k) sum, as the fluid stream in current period Enter temperature T during second wet clutchin2(k)。
- 12. the determining device of wet clutch surface temperature as claimed in claim 8, it is characterised in that the described 3rd calculates Unit includes：First obtains subelement, and for obtaining the conduction parameter of the component, the conduction parameter includes：The conduction of the component Coefficient Con, conduction surface Acon and conduction thickness Thic；Second obtains subelement, for obtaining the temperature T of the component surface in current periodCON(k)；Computation subunit, for the temperature TC(k) with the temperature TCON(k) difference is quadratured in time, then with institute State conduction surface Acon and be multiplied with conducting thickness Thic ratio with coefficient of conductivity Con product, as the heat JCON(k) Value.
- 13. the determining device of wet clutch surface temperature as claimed in claim 12, it is characterised in that the wet type clutch The component of device itself includes：Support and the platen being arranged on support, the heat JCON(k) value is equal to the platen institute The heat sum that the heat distributed is distributed with the support.
- 14. the determining device of wet clutch surface temperature as claimed in claim 8, it is characterised in that the described 5th calculates Unit includes：First obtains subelement, for obtaining the specific heat C of the wet clutchp；Second obtains subelement, for obtaining the mass M of the wet clutchc；Computation subunit, for first difference and the specific heat CpWith mass McProduct ratio, as described current The variable quantity of the wet clutch surface temperature in cycle.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105840686B (en) * | 2016-05-04 | 2018-02-27 | 中国第一汽车股份有限公司 | Wet-type dual-clutch surface temperature calculates method |
| CN106438761B (en) * | 2016-10-24 | 2019-07-09 | 广州汽车集团股份有限公司 | Method and apparatus for determining wet dual clutch transmission temperature |
| CN106678213B (en) * | 2016-11-10 | 2019-08-02 | 广州汽车集团股份有限公司 | Temperature method of real-time and device for wet dual clutch transmission |
| CN108297855B (en) * | 2018-03-26 | 2020-08-07 | 重庆长安汽车股份有限公司 | Clutch operation control method and device and power coupling system |
| CN110110377B (en) * | 2019-04-09 | 2020-05-08 | 东风商用车有限公司 | Temperature estimation method for friction plate of clutch |
| CN110490994A (en) * | 2019-06-11 | 2019-11-22 | 汉腾汽车有限公司 | A kind of algorithm of clutch temp computing function |
| CN110513407B (en) * | 2019-08-15 | 2021-11-19 | 安徽江淮汽车集团股份有限公司 | Clutch temperature control method and device, electronic equipment and storage medium |
| CN112431876B (en) * | 2019-08-26 | 2022-05-27 | 上海汽车集团股份有限公司 | Temperature estimation method and device for dry clutch |
| CN111791869B (en) * | 2019-10-31 | 2021-10-08 | 长城汽车股份有限公司 | Intelligent four-wheel-drive control method and system and vehicle |
| CN110953263B (en) * | 2019-12-04 | 2021-08-31 | 珠海华粤传动科技有限公司 | Control method and device based on surface temperature of wet-type double clutch |
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