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A method and device for determining the clutch surface temperature of a wet DCT

A technology of surface temperature and determination method, applied in clutches, friction clutches, mechanical drive clutches, etc., can solve the problems of complex heat calculation and low accuracy of results, and achieve the effect of accurate sliding friction power

Active Publication Date: 2019-09-10
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the calculation of the heat dissipated by the components of the clutch itself is relatively complicated, and the accuracy of the calculation results is not high

Method used

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  • A method and device for determining the clutch surface temperature of a wet DCT
  • A method and device for determining the clutch surface temperature of a wet DCT
  • A method and device for determining the clutch surface temperature of a wet DCT

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Experimental program
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Embodiment Construction

[0061] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0062] Such as figure 1 , figure 2 The method for determining the clutch surface temperature of the wet DCT shown includes:

[0063] Collect the transmission oil temperature (corresponding to the oil temperature at the lubrication inlet of the clutch assembly), engine speed, fork position signal, gear signal, and obtain the slipping power of the first clutch, the slipping power of the second clutch and the main oil circuit pressure.

[0064] According to transmission oil temperature, engine speed, fork position signal, gear signal, surface temperature of the first clutch in the previous cycle, surface temperature of the second clutch in the previous cycle, slipping power of the first clutch, slipping power of the second clutch The actual lubrication flow flowing into the clutch assembly is calculated based on the friction power and main oil circuit pressure; the ...

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Abstract

The invention discloses a method and a device for determining the clutch surface temperature of a wet type DCT. The method has the steps that the actual lubricating flow flowing into a clutch assemblyis calculated according to the oil temperature of the transmission, the rotating speed of an engine, a shifting fork position signal, a gear signal, the surface temperature of a first clutch, the surface temperature of a second clutch, the sliding friction power of the first clutch, the sliding friction power of the second clutch and the pressure of a main oil circuit; and according to the actuallubricating flow flowing into the clutch assembly, the rotating speed of the engine, the oil temperature of the transmission, the sliding friction power of the first clutch and the sliding friction power of the second clutch, the surface temperature of the first clutch and the surface temperature of the second clutch are calculated. According to the method and the device for determining the clutch surface temperature of the wet type DCT, the obtained clutch surface temperature can be more accurate.

Description

technical field [0001] The invention relates to the technical field of automatic transmissions for automobiles, in particular to a method and device for determining the clutch surface temperature of a wet DCT. Background technique [0002] A wet DCT (Dual Clutch Transmission) consists of two input shafts. One input shaft controls the odd-numbered gears and the other controls the even-numbered gears. When changing gears, one clutch loses power to the engaged gear while the other clutch enables The pre-engaged gears get power, and the continuous transmission of power is realized through the alternate work of the two clutches. [0003] If the heat generated when the wet multi-plate clutch is engaged cannot be dissipated through the cooling system in time, the clutch friction plate and the counter steel plate may become overheated and fail due to heat accumulation. Unnecessarily large clutch drag torque increases vehicle fuel consumption; therefore, in actual engineering applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H57/04F16H63/40F16D13/58
Inventor 王银余盼霞刘波杨志斌王鑫张学勇司彦涛李锟
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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