CN105840686B - Wet-type dual-clutch surface temperature calculates method - Google Patents

Wet-type dual-clutch surface temperature calculates method Download PDF

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CN105840686B
CN105840686B CN201610285802.0A CN201610285802A CN105840686B CN 105840686 B CN105840686 B CN 105840686B CN 201610285802 A CN201610285802 A CN 201610285802A CN 105840686 B CN105840686 B CN 105840686B
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clutch
oil
temperature
cooling
surface temperature
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CN105840686A (en
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熊杰
张广辉
周达
赵彬
曹龙
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FAW Group Corp
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FAW Group Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F16D13/72—Features relating to cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F16D13/74—Features relating to lubrication

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

The invention discloses a kind of wet-type dual-clutch surface temperature to calculate method.Wet-type dual-clutch is made up of interior clutch and outer clutch, according to its mechanical structure, calculate respectively in clutch and outer clutch surface temperature.This method comprises the steps：According to clutch driving plate and clutch plate speed discrepancy and clutch transmission torque, clutch heating power inside and outside calculating；According to inner clutch surface temperature, oil sump temperature, cooling oil flow and interior clutch oil-out oil temperature, the cooling power of clutch inside and outside calculating；By clutch heating power and cooling power, the rate of temperature change of clutch is calculated；Rate of temperature change is integrated, calculates the surface temperature of current inside and outside clutch.The present invention can accurately calculate automatic wet-type double clutch surface temperature by oil sump oil temperature.

Description

Wet-type dual-clutch surface temperature calculates method
Technical field
The invention belongs to automatic wet-type dual-clutch transmission control technology field, is related to one kind and is used for wet-type dual-clutch The method that surface temperature calculates.
Background technology
Double clutch is divided into dry clutch and the major class of wet clutch two, and dry clutch only leans on wind-cooling heat dissipating, thermal capacitance Amount is than relatively low, and clutch can not be for a long time in sliding state of rubbing, and wet clutch is soaked in transmission oil and cooled down, thermal capacitance Amount is higher, can be chronically at sliding state of rubbing, and transmission torque capacity is larger, so being more suitable for configuring double-clutch type automatic gear shifting Device.
When wet clutch hot soak condition, coefficient of friction, the increase clutch disc of clutch are easily damaged Wear extent and capacity of reduction torsion pass etc., if temperature is too high and has exceeded wet clutch ability to bear, are easy to occur Phenomena such as clutch ablation.In order to prevent that clutch temp is too high, it is necessary to monitor clutch temp in real time.Wet clutch temperature With produce heat number and the time it is relevant, because clutch separation and binding time are very short, frequently separate with reference to being easy to Cause clutch local temperature too high, so obtaining clutch surface temperature in time and taking corresponding measure, to protecting clutch Device is very important.
The A patents of the number of applying for a patent CN 103459876 disclose one kind and predict clutch temp using clutch pressure Method.The A patents of the number of applying for a patent CN 103967963 disclose one kind and utilize neural network algorithm, based on clutch pressure The method for calculating clutch temp.The A patents of the number of applying for a patent CN 104501997 disclose one kind and mainly utilize TEMP Device, the method that auxiliary detects clutch temp using temperature model.The A patents of the number of applying for a patent CN 104698864 disclose one kind The method that clutch temp is calculated using the heat compensating factor and clutch specific heat capacity for tabling look-up to obtain.The number of applying for a patent CN 104049650 A patents use FUZZY ALGORITHMS FOR CONTROL, based on clutch pressure, speed discrepancy and clutch temperature at outlet calculate from The method of clutch temperature.However, the technical scheme disclosed in these patents, can not come real by using oil sump oil temperature data When accurately calculate the surface temperature of clutch.
Two clutches of wet-type dual-clutch are nested together, cooling oil first flow through interior clutch enter back into it is outer from Clutch, oil sump is finally flowed out to by outer clutch.Because the heat radiation power of interior clutch and outer clutch is different, must The temperature of inside and outside clutch must be calculated respectively.And in the clutch temp control method of prior art, do not calculate respectively The temperature of inside and outside clutch, so as to which the temperature of wet clutch can not accurately be calculated, so as to can not be effectively protected wet type from Clutch.
Therefore, the surface temperature of wet-type dual-clutch how is accurately calculated in real time to protect wet-type dual-clutch to become Problem urgently to be resolved hurrily.
The content of the invention
In order to solve the above technical problems, the present invention provides one kind can accurately calculate wet-type dual-clutch surface temperature in real time Degree, the wet-type dual-clutch surface temperature to be played an important role to protection clutch calculate method.
The technical scheme that embodiments of the invention provide is as follows：
The present invention provides a kind of wet-type dual-clutch surface temperature and calculates method, including：According to engine and interior clutch The speed discrepancy W of clutch plateIN, engine and outer clutch driven plate speed discrepancy WOUT, interior clutch transmission torque MINOutside from Clutch transmits moment of torsion MOUTTo calculate the heating power P of interior clutchIN_CltHeatWith the heating power P of outer clutchOUT_CltHeat； According to upper a cycle inner clutch surface temperature TIN_Clt, oil sump oil temperature TSumpCounted with interior clutch cooling oil flow Qin The cooling power P of clutch in calculationIN_CltCool, according to clutch surface temperature T outside upper a cycleOUT_Clt, the outlet of interior clutch Oil temperature TIN_OilThe cooling power P of outer clutch is calculated with outer clutch cooling oil flow QoutOUT_CltCool；According to oil sump Oil temperature TSump, clutch outlet oil temperature T in upper a cycleIN_OilInterior clutch is calculated with interior clutch cooling oil flow Qin The cooling power P of cooling oilIN-OilCool；Oil temperature T is exported according to interior clutchIN_Oil, the outer clutch outlet oil temperature of upper a cycle TOUT_OilThe cooling power P of outer clutch cooling oil is calculated with outer clutch cooling oil flow QoutOUT-OilCool；Interior clutch Heating power PIN_CltHeat, outer clutch heating power POUT_CltHeatDivided by the heating coefficient of inside and outside clutch obtains The value added Δ T of clutch surface temperatureIN_CltInc, outer clutch surface temperature value added Δ TOUT_CltInc, interior clutch Cooling power PIN_CltCool, outer clutch cooling power POUT_CltCoolThe cooling ratio of clutch, outer clutch within Cooling ratio obtains the decreasing value Δ T of inner clutch surface temperatureIN_CltDwn, outer clutch surface temperature decreasing value Δ TOUT_CltDwn, inner clutch surface temperature increase Δ TIN_CltInc, outer clutch surface temperature increase Δ TOUT_CltIncSubtract Inner clutch surface temperature decreasing value Δ TIN_CltDwn, outer clutch surface temperature decreasing value Δ TOUT_CltDwnObtain interior clutch Surface temperature changing value and outer clutch surface temperature change value, inner clutch surface temperature change value, outer clutch surface temperature Degree changing value is multiplied by sampling period Tcl and obtains the rate of temperature change Δ T of interior clutchIN_Clt, outer clutch rate of temperature change Δ TOUT_Clt；The heating power P of interior clutchIN_CltHeatThe heating power of clutch cooling oil obtains interior clutch cooling within removing The temperature increase Δ T of oilIN_OilInc；Interior clutch cooling power PIN-CltCoolThe cooling power of clutch cooling oil within removing PIN-OilCoolObtain interior clutch cooling oil temperature decreasing value Δ TIN_OilDwn；Interior clutch cooling oil temperature increase Δ TIN_OilIncSubtract interior clutch cooling oil temperature decreasing value Δ TIN_OilDwnObtain interior clutch temp changing value；Interior clutch temperature Degree changing value is multiplied by sampling period Tcl and obtains interior clutch cooling oil rate of temperature change Δ TIN_Oil；Similarly, outer clutch is obtained Cooling oil temperature increase Δ TOUT_OilInc, outer clutch cooling oil temperature decreasing value Δ TOUT_OilDwnAnd rate of temperature change Δ TOUT_Oil；Internal clutch cooling oil rate of temperature change and outer clutch cooling oil rate of temperature change are carried out in integration respectively obtains Oil temperature T at clutch oil-outIN_OilWith oil temperature T at outer clutch oil-outOUT_Oil, to inner clutch surface rate of temperature change Integrated to obtain the surface temperature T of interior clutch with outer clutch surface rate of temperature changeIN_CltWith the surface temperature of outer clutch Spend TOUT_Clt。
Further, the heating power P of the interior clutch is calculated according to following formula (1) and (2)IN_CltHeatWith it is outer The heating power P of clutchOUT_CltHeat:
PIN_CltHeat=WIN×MIN (1)
POUT_CltHeat=WOUT×MOUT (2)。
Further, the cooling power P of the interior clutch is calculated according to following formula (3) and (4)IN_CltCoolAnd institute State the cooling power P of outer clutchOUT_CltCool：
PIN_CltCoolt=(TIN_Clt-TSump)×Qin (3)
POUT_CltCool=(TOUT_Clt-TIN_Oil)×Qout (4)。
Further, the cooling power of the interior clutch cooling oil is calculated according to following formula (5) and (6) PIN-OilCoolWith the cooling power P of the outer clutch cooling oilOUT-OilCool：
PIN_OilCool=(TIN_Oil-TSump)×Qin (5)
POUT_OilCool=(TOUT_Oil-TIN_Oil)×Qout (6)。
Further, the rate of temperature change Δ T of interior clutch is calculated according to following formula (7)-(8)IN_CltWith outer clutch The rate of temperature change Δ T of deviceOUT_CltAnd calculate the rate of temperature change of the cooling oil of interior clutch according to formula (9)-(10) ΔTIN_OilWith the rate of temperature change Δ T of the cooling oil of outer clutchOUT_Oil：
ΔTIN_Clt=(Δ TIN_CltInc-ΔTIN_CltDwn)×Tcl (7)
ΔTOUT_Clt=(Δ TOUT_CltInc-ΔTOUT_CltDwn)×Tcl (8)
ΔTIN_Oil=(Δ TIN_OilInc-ΔTIN_OilDwn)×Tcl (9)
ΔTOUT_Oil=(Δ TOUT_OilInc-ΔTOUT_OilDwn)×Tcl (10)。
Further, the surface temperature of the interior clutch and outer clutch is calculated according to following formula (11)-(14) TIN_Clt、TOUT_CltWith interior clutch and the cooling oil temperature T of outer clutchIN_Oil、TOUT-Oil：
TIN_Clt=∫ Δs TIN_Cltdt (11)
TOUT_Clt=∫ Δs TOUT_Cltdt (12)
TIN_Oil=∫ Δs TIN_Oildt (13)
TOUT_Oil=∫ Δs TOUT_Oildt (14)。
Further, the oil sump oil temperature TSumpMeasured by temperature sensor.
Further, the sampling period Tcl is 0.01 second.
Wet-type dual-clutch of the present invention has the beneficial effect that：
1st, wet clutch surface temperature can be accurately calculated in real time using the present invention, according to the clutch being calculated Surface temperature controls the cooling flow of clutch, so as to play a part of protecting clutch.
2nd, by known wet-type dual-clutch signal, double clutch surface temperature and double clutch are calculated exactly Oil temperature, it is not necessary to additionally increase sensor, so as to save cost.
Brief description of the drawings
Fig. 1 is that the surface temperature of the wet-type dual-clutch of the present invention calculates the flow chart of method.
Fig. 2 is the structure diagram of the wet-type dual-clutch of the present invention.
Fig. 3 is the cooling oil flow circuit diagram of the wet-type dual-clutch of the present invention.
Embodiment
The embodiment of the present invention is described below in conjunction with accompanying drawing.
Fig. 1 is that the surface temperature of the wet-type dual-clutch of the present invention calculates the flow chart of method.Fig. 2 is the wet type of the present invention The structure diagram of double clutch.Fig. 3 is the cooling oil flow circuit diagram of the wet-type dual-clutch of the present invention.
First, referring to figs. 2 and 3, to the present invention wet-type dual-clutch simply introduced.
As shown in Fig. 2 the wet-type dual-clutch of the present invention includes the interior clutch to set with each other in terms of mechanical structure Device 5 and outer clutch 6.Outer clutch driven plate 62 is connected with the first transmission input shaft 1, interior clutch driven plate 51 and second Transmission input shaft 2 is connected, and the driving disc spacing pressing 51,61 of inside and outside clutch is all connected on engine flywheel (not shown).
As shown in figure 3, the wet-type dual-clutch cooling oil of the present invention is first entered from fuel tank outflow by interior clutch oil inlet passage 7 Enter interior clutch 5, internal clutch 5 is cooled down, and because interior clutch 5 rotates at a high speed, cooling oil is through interior clutch oil-out 3 Be dumped into outer clutch 6, external clutch 6 is cooled down, because outer clutch 6 also rotates in high speed, cooling oil warp it is outer from Clutch oil-out 4 is thrown out of double clutch 6, most flow back into oil sump through oil pipe afterwards.
Next, the surface temperature calculating method of the wet-type dual-clutch of the present invention is introduced.As shown in figure 1, this The surface temperature of the wet-type dual-clutch of invention, which calculates method, to be included：
Step 101：Obtain relevant parameter
Oil sump oil temperature T is obtained using temperature sensor measurement (not shown)sump, interior clutch cooling oil flow Qin and Outer clutch cooling oil flow Qout is used as preset parameter.These preset parameters are known conditions, according to these preset parameters It is specific to calculate with reference to following step 102-106 to calculate inside and outside the clutch surface temperature and oil temperature of wet-type dual-clutch.
Step 102：The heating power P of clutch in calculatingIN_CltHeatWith the heating power P of outer clutchOUT_CltHeat
Double clutch cooling oil is introduced into interior clutch 5 after oil sump outflow, is then entered again by interior clutch oil-out 3 Enter outer clutch 6, so, entrance temperature that can be using oil sump oil temperature as interior clutch cooling oil, by going out for interior clutch Entrance temperature of the hydraulic fluid port temperature as outer clutch cooling oil.By engine and double clutch clutch plate speed discrepancy WIN、WOUTAnd from Clutch transmits moment of torsion MIN、MOUT, according to clutch heating power P in general formulae P=W × M calculatingIN_CltHeatWith outer clutch Heating power POUT_CltHeat, wherein, W represents rotating speed difference, and M represents the moment of torsion of clutch transmission, and specific calculate sees formula (1) (2)。
PIN_CltHeat=WIN×MIN (1)
POUT_CltHeat=WOUT×MOUT (2)
Step 103：The cooling power P of clutch in calculatingIN_CltCoolWith the cooling power P of outer clutchCUT_CltCool
According to upper a cycle inner clutch surface temperature TIN_Clt, oil sump oil temperature TSumpOil stream is cooled down with interior clutch Qin is measured to calculate the cooling power P of interior clutchIN_CltCool, according to clutch surface temperature T outside upper a cycleOUT_Clt, it is interior Clutch outlet oil temperature TIN_OilThe cooling power of outer clutch is calculated with outer clutch cooling oil flow Qout, it is specific to calculate Referring to following formula (3) and (4)：
PIN_CltCoolt=(TIN_Clt-TSump)×Qin (3)
POUT_CltCool=(TOUT_Clt-TIN_Oil)×Qout (4)
Step 104：The cooling power P of clutch cooling oil in calculatingIN-OilCoolWith the cooling work(of outer clutch cooling oil Rate POUT-OilCool
When calculating double clutch (inside and outside clutch) surface temperature, it is necessary to know the cooling oil temperature in double clutch, The cooling oil temperature in clutch is also calculated while double clutch surface temperature is calculated, Computing Principle is the same as the double clutches of calculating Device surface temperature is the same.
Specifically, according to oil sump oil temperature TSump, clutch outlet oil temperature T in upper a cycleIN_OilIt is cold with interior clutch But oil stream amount Qin calculates the cooling power P of interior clutch cooling oilIN-OilCool；Oil temperature T is exported according to interior clutchIN_Oil、 The outer clutch outlet oil temperature T of upper a cycleOUT_OilOuter clutch cooling oil is calculated with outer clutch cooling oil flow Qout Cooling power POUT-OilCool, specifically calculate referring to following formula (5) and (6)：
PIN_OilCool=(TIN_Oil-TSump)×Qin (5)
POUT_OilCool=(TOUT_Oil-TIN_Oil)×Qout (6)。
Step 105：Calculate the rate of temperature change Δ T of inside and outside clutchIN_Clt、TOUT_CltAnd inside and outside clutch cooling oil Rate of temperature change TIN_Oil、TOUT_Oil
The heating power P of interior clutchIN_CltHeat, outer clutch heating power POUT_CltHeatDivided by inside and outside clutch Heating coefficient obtain the value added Δ T of inner clutch surface temperatureIN_CltInc, outer clutch surface temperature value added Δ TOUT_CltInc, the cooling power P of interior clutchIN_CltCool, outer clutch cooling power POUT_CltCoolClutch within removing Cooling ratio, the cooling ratio of outer clutch obtain the decreasing value Δ T of inner clutch surface temperatureIN_CltDwn, outer clutch surface The decreasing value Δ T of temperatureOUT_CltDwn, inner clutch surface temperature increase Δ TIN_CltInc, outer clutch surface temperature increase ΔTOUT_CltIncSubtract inner clutch surface temperature decreasing value Δ TIN_CltDwn, outer clutch surface temperature decreasing value Δ TOUT_CltDwn Obtain inner clutch surface temperature change value and outer clutch surface temperature change value, it is inner clutch surface temperature change value, outer Clutch surface temperature change value is multiplied by sampling period Tcl and obtains the rate of temperature change Δ T of interior clutchIN_Clt, outer clutch Rate of temperature change Δ TOUT_Clt, specifically calculate referring to following formula (7)-(8).
The heating power P of interior clutchIN_CltHeatIt is cold to obtain interior clutch for the heating power of clutch cooling oil within removing Oily temperature increase Δ TIN_OilInc；Interior clutch cooling power PIN_CltCoolThe cooling work(of clutch cooling oil within removing Rate PIN-OilCoolObtain interior clutch cooling oil temperature decreasing value Δ TIN_OilDwn；Interior clutch cooling oil temperature increase Δ TIN_OilIncSubtract interior clutch cooling oil temperature decreasing value Δ TIN_OilDwnObtain interior clutch temp changing value；Interior clutch temperature Degree changing value is multiplied by sampling period Tcl and obtains interior clutch cooling oil rate of temperature change Δ TIN_Oil；Similarly, outer clutch is obtained Cooling oil temperature increase Δ TOUT_OilInc, outer clutch cooling oil temperature decreasing value Δ TOUT_OilDwnAnd rate of temperature change Δ TOUT_Oil, specifically calculate referring to following formula (9)-(10).
ΔTIN_Clt=(Δ TIN_CltInc-ΔTIN_CltDwn)×Tcl (7)
ΔTOUT_Clt=(Δ TOUT_CltInc-ΔTOUT_CltDwn)×Tcl (8)
ΔTIN_Oil=(Δ TIN_OilInc-ΔTIN_OilDwn)×Tcl (9)
ΔTOUT_Oil=(Δ TOUT_OilInc-ΔTOUT_OilDwn)×Tcl (10)
Typically, sampling period Tcl is 0.01 second.In addition, in the present invention, the heating coefficient of interior clutch and outer clutch Determined with cooling ratio according to the model of clutch, be prior art, omit herein and it is discussed in detail.
Step 106：The surface temperature T of clutch inside and outside calculatingIN_Clt、TOUT_CltWith inside and outside clutch cooling oil temperature TIN_Oil、TOUT_Oil
Rate of temperature change has been calculated in above-mentioned steps 105, rate of temperature change has been quadratured, it is possible in obtaining, Outer clutch surface temperature and inside and outside clutch cooling oil temperature.Specifically, internal clutch cooling oil rate of temperature change and outer Clutch cooling oil rate of temperature change is integrated to obtain oil temperature T at interior clutch oil-outIN_OilAt outer clutch oil-out Oil temperature TOUT_Oil, inner clutch surface rate of temperature change and outer clutch surface rate of temperature change are integrated to obtain interior clutch The surface temperature T of deviceIN_CltWith the surface temperature T of outer clutchOUT_Clt, can be calculated by following formula (11)-(14) inside and outside The surface temperature T of clutchIN_Clt、TOUT_CltWith the cooling oil temperature T of inside and outside clutchIN_Oil、TOUT_Oil：
TIN_Clt=∫ Δs TIN_Cltdt (11)
TOUT_Clt=∫ Δs TOUT_Cltdt (12)
TIN_Oil=∫ Δs TIN_Oildt (13)
TOUT_Oil=∫ Δs TOUT_Oildt (14)
In summary, method is calculated using the surface temperature of the wet-type dual-clutch of the present invention can accurately calculate in real time Wet clutch surface temperature, the cooling flow of clutch is controlled according to the clutch surface temperature being calculated, so as to rise To the effect of protection clutch, double clutch surface temperature can be calculated exactly by known wet-type dual-clutch signal The oil temperature of degree and double clutch, it is not necessary to additionally increase sensor, so as to save cost.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this The scope of invention is limited by claim and its equivalent.

Claims (8)

1. a kind of wet-type dual-clutch surface temperature calculates method, it is characterised in that including：
According to engine and the speed discrepancy W of interior clutch driven plateIN, engine and outer clutch driven plate speed discrepancy WOUT, it is interior Clutch transmission torque MINWith outer clutch transmission torque MOUTTo calculate the heating power P of interior clutchIN_CltHeatWith outer clutch The heating power P of deviceOUT_CltHeat；
According to upper a cycle inner clutch surface temperature TIN_Clt, oil sump oil temperature TSumpWith interior clutch cooling oil flow Qin To calculate the cooling power P of interior clutchIN_CltCool, according to clutch surface temperature T outside upper a cycleOUT_Clt, interior clutch Export oil temperature TIN_OilThe cooling power P of outer clutch is calculated with outer clutch cooling oil flow QoutOUT_CltCool；
According to oil sump oil temperature TSump, clutch outlet oil temperature T in upper a cycleIN_OilWith interior clutch cooling oil flow Qin To calculate the cooling power P of interior clutch cooling oilIN-OilCool；Oil temperature T is exported according to interior clutchIN_Oil, outside upper a cycle Clutch outlet oil temperature TOUT_OilThe cooling power of outer clutch cooling oil is calculated with outer clutch cooling oil flow Qout POUT-OilCool；
The heating power P of interior clutchIN_CltHeat, outer clutch heating power POUT_CltHeatDivided by the hair of inside and outside clutch Hot coefficient CofIN_Heat、CofOUT_HeatObtain the value added Δ T of inner clutch surface temperatureIN_CltInc, outer clutch surface temperature Value added Δ TOUT_CltInc, the cooling power P of interior clutchIN_CltCool, outer clutch cooling power POUT_CltCoolDivided by The cooling ratio Cof of interior clutchIN_Cool, outer clutch cooling ratio CofOUT_CoolObtain subtracting for inner clutch surface temperature Small value Δ TIN_CltDwn, outer clutch surface temperature decreasing value Δ TOUT_CltDwn, inner clutch surface temperature increase Δ TIN_CltInc, outer clutch surface temperature increase Δ TOUT_CltIncSubtract inner clutch surface temperature decreasing value Δ TIN_CltDwn、 Outer clutch surface temperature decreasing value Δ TOUT_CltDwnObtain inner clutch surface temperature change value and outer clutch surface temperature Changing value, inner clutch surface temperature change value, outer clutch surface temperature change value are multiplied by sampling period Tcl and obtain interior clutch The rate of temperature change Δ T of deviceIN_Clt, outer clutch rate of temperature change Δ TOUT_Clt；
The heating power P of interior clutchIN_CltHeatThe heating power of clutch cooling oil obtains interior clutch cooling oil within removing Temperature increase Δ TIN_OilInc；The cooling power P of interior clutchIN_CltCoolThe cooling power of clutch cooling oil within removing PIN-OilCoolObtain interior clutch cooling oil temperature decreasing value Δ TIN_OilDwn；Interior clutch cooling oil temperature increase Δ TIN_OilIncSubtract interior clutch cooling oil temperature decreasing value Δ TIN_OilDwnObtain interior clutch temp changing value；Interior clutch temperature Degree changing value is multiplied by sampling period Tcl and obtains interior clutch cooling oil rate of temperature change Δ TIN_Oil；Similarly, outer clutch is obtained Cooling oil temperature increase Δ TOUT_OilInc, outer clutch cooling oil temperature decreasing value Δ TOUT_OilDwnAnd rate of temperature change Δ TOUT_Oil；
Internal clutch cooling oil rate of temperature change and outer clutch cooling oil rate of temperature change carry out integration respectively obtain in from Oil temperature T at clutch oil-outIN_OilWith oil temperature T at outer clutch oil-outOUT_Oil, to inner clutch surface rate of temperature change and Outer clutch surface rate of temperature change is integrated to obtain the surface temperature T of interior clutchIN_CltWith the surface temperature of outer clutch TOUT_Clt。
2. wet-type dual-clutch surface temperature according to claim 1 calculates method, it is characterised in that according to following formula (1) and (2) calculate the heating power P of the interior clutchIN_CltHeatWith the heating power P of outer clutchOUT_CltHeat:
PIN_CltHeat=WIN×MIN (1)
POUT_CltHeat=WOUT×MOUT (2)。
3. wet-type dual-clutch surface temperature according to claim 1 calculates method, it is characterised in that according to following formula (3) and (4) calculate the cooling power P of the interior clutchIN_CltCoolWith the cooling power P of the outer clutchOUT_CltCool：
PIN_CltCoolt=(TIN_Clt-TSump)×Qin (3)
POUT_CltCool=(TOUT_Clt-TIN_Oil)×Qout (4)。
4. wet-type dual-clutch surface temperature according to claim 1 calculates method, it is characterised in that according to following formula (5) and (6) calculate the cooling power P of the interior clutch cooling oilIN-OilCoolWith the cooling of the outer clutch cooling oil Power POUT-OilCool：
PIN_OilCool=(TIN_Oil-TSump)×Qin (5)
POUT_OilCool=(TOUT_Oil-TIN_Oil)×Qout (6)。
5. wet-type dual-clutch surface temperature according to claim 1 calculates method, it is characterised in that according to following formula (7)-(8) calculate the rate of temperature change Δ T of interior clutchIN_CltWith the rate of temperature change Δ T of outer clutchOUT_CltAnd root The rate of temperature change Δ T of the cooling oil of interior clutch is calculated according to formula (9)-(10)IN_OilWith the temperature of the cooling oil of outer clutch Spend rate of change Δ TOUT_Oil：
ΔTIN_Clt=(Δ TIN_CltInc-ΔTIN_CltDwn)×Tcl (7)
ΔTOUT_Clt=(Δ TOUT_CltInc-ΔTOUT_CltDwn)×Tcl (8)
ΔTIN_Oil=(Δ TIN_OilInc-ΔTIN_OilDwn)×Tcl (9)
ΔTOUT_Oil=(Δ TOUT_OilInc-ΔTOUT_OilDwn)×Tcl (10)。
6. wet-type dual-clutch surface temperature according to claim 1 calculates method, it is characterised in that according to following formula (11)-(14) calculate the surface temperature T of the interior clutch and outer clutchIN_Clt、TOUT_CltWith interior clutch and outer clutch The cooling oil temperature T of deviceIN_Oil、TOUT-Oil：
TIN_Clt=∫ Δs TIN_Cltdt (11)
TOUT_Clt=∫ Δs TOUT_Cltdt (12)
TIN_Oil=∫ Δs TIN_Oildt (13)
TOUT_Oil=∫ Δs TOUT_Oildt (14)。
7. wet-type dual-clutch surface temperature according to claim 1 calculates method, it is characterised in that the oil sump oil Warm TSumpMeasured by temperature sensor.
8. wet-type dual-clutch surface temperature according to claim 1 calculates method, it is characterised in that the sampling period Tcl is 0.01 second.
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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
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