Clutch temperature control method and system for wet type DCT

A temperature control method and clutch technology, applied in the control/adjustment system, mechanical control device, transmission device control, etc., can solve the problems of complex calorie calculation, insufficient comprehensive and accurate judgment of overheating conditions, and low accuracy of results

Inactive Publication Date: 2018-07-31
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • 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
[0005] CN105156645A discloses a clutch temperature control method and system of a wet dual-clutch transmission

Method used

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  • Clutch temperature control method and system for wet type DCT
  • Clutch temperature control method and system for wet type DCT
  • Clutch temperature control method and system for wet type DCT

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Embodiment Construction

[0078] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0079] Such as figure 1 , figure 2 The clutch temperature control methods for the wet DCT shown include:

[0080] Collect transmission oil temperature T 3 (corresponding to the oil temperature at the lubrication inlet of the clutch assembly), engine speed, fork position signal, and gear signal to obtain the sliding power of the first clutch, the sliding power of the second clutch and the pressure of the main oil circuit.

[0081] According to transmission oil temperature T 3 , engine speed, fork position signal, gear signal, first clutch surface temperature T 1 , Second clutch surface temperature T 2 , the sliding friction power of the first clutch, the sliding friction power of the second clutch and the pressure of the main oil circuit, determine the target demand flow of the clutch assembly for the lubricating and cooling oil. The wet DCT in this embodiment ...

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Abstract

The invention discloses a clutch temperature control method and system for a wet type DCT. The method comprises the steps that according to oil temperature of a transmission, rotating speed of an engine, a shifting fork position signal, a gear signal, surface temperature of a first clutch, surface temperature of a second clutch, friction power of the first clutch, the friction power of the secondclutch and pressure of a main oil path, actual lubricating flow flowing into a clutch assembly is calculated; according to the actual lubricating flow flowing into the clutch assembly, the rotating speed of the engine, the oil temperature of the transmission, the friction power of the first clutch and the friction power of the second clutch, the surface temperature of the first clutch and the surface temperature of the second clutch are calculated; and then according to the surface temperature of the first clutch, the surface temperature of the second clutch and the oil temperature of the transmission, whether the clutch assembly is overheated or not is judged, and overheating protection is started in a hierarchical mode. By adopting the control method and system, accurate surface temperature of the clutches can be obtained, and the surface temperature of the clutches combines with the oil temperature of the transmission to be taken as a judgment basis for carrying out clutch overheating protection.

Description

technical field [0001] The invention relates to the technical field of automatic transmissions for automobiles, in particular to a wet DCT clutch temperature control method and system. 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. Unnecessary clutch drag torque increases the fuel consumption of the vehicle; therefore, in actual engineering applications, appropriate cl...

Claims

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Application Information

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IPC IPC(8): F16H57/04F16H61/40F16H63/32
CPCF16H57/0412F16H57/0434F16H61/40F16H63/32
Inventor 王银余盼霞刘波杨志斌王鑫张学勇司彦涛罗超文刘洋
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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