|Table of Contents|

Semi-linkage thermal stability of dry clutch under highly accelerated life test(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2016年03期
Page:
84-90
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Semi-linkage thermal stability of dry clutch under highly accelerated life test
Author(s):
WANG Yang-yang12 CHEN Guang-da2 LI Nan3 YUAN Yi-qing12
1. Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804, China; 2. School of Automotive, Tongji University, Shanghai 201804, China; 3. Institute of Mechanical Engineering, University of Michigan-Ann Arbor, Ann Arbor 48109, Michigan, America
Keywords:
vehicle engineering dry clutch semi-linkage highly accelerated life test enhancement loading profile friction plate thermal stability
PACS:
U463.51
DOI:
-
Abstract:
Aiming at the problem of thermal failure of dry clutch during semi-linkage operation, the thermal stability of clutch in semi-linkage process was studied. Based on the sliding friction power of clutch during semi-linkage operation, the key variables effecting the thermal stability were acquired, including the axial pressure of friction plate, relative sliding speed and sliding friction duration time. With the combination of dry clutch thermal model and highly accelerated life test(HALT)method, the enhancement loading profile was designed, and the effect of cyclic enhancement loading test of friction plate thermal model was verified. In order to reflect the influence degrees of different variables on the thermal stability in highly accelerated life test, the effect of sensitive variables on the highest hot spot temperature of friction plate was studied by using orthogonal test and range analysis method. Analysis result indicates that according to the influence degrees from the great to the little, the order of key variables are relative sliding speed, sliding friction duration time and the axial pressure of friction plate respectively. When the engine is running at a lower speed of 1 000 r·min-1, the hot spot temperature is always under the safe temperature of 200 ℃. When the engine speed exceeds 1 500 r·min-1, the axial pressure of friction plate is more than 2.0 kN, and the sliding friction duration time is more than 8 s, the hot spot temperature will exceed the safe temperature of 200 ℃. With the right semi-linkage operation, such as controlling both the engine speed and the accumulation time of frequent semi-linkage operation, the thermal failure of friction plate can be effectively prevented. 5 tabs, 11 figs, 23 refs.

References:

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Last Update: 2016-06-30