A Study on the Parameters Influence upon Automotive Neutral Gear Rattle

자동차 공회전시 기어 치타음에 영향을 미치는 파라미터에 관한 연구

  • Hong, D.P. (Chonbuk National University) ;
  • Chung, T.J. ;
  • Ahn, B.M. ;
  • Jeon, B.H.
  • Published : 1997.02.01

Abstract

The non-periodic angular accelerations of engine are the major cause of gear rattle. This gear rattle is based on the existence of a backlash between the drive gear of input shaft and the free gear of output shaft in the gearbox. Especially, the neutral gear rattle have a very bad effect on the ride quality. Test-rig was constructed in order to evaluate the parameter influence upon the neutral gear rattle. Also, each different 4 type torsional characteristic of clutch was manufactured. Experimental conditions are the use of each different 4 type torsional characteristic of clutch and oil temperature variation in gearbox. In case of the same stiffiness of pre-damper type clutch at idling, the clutch of large hysteresis showed dam- ping effects at the 2nd input gear and the 2nd output gear. Also, the main-damper type clutch was shown to large resonance phenomenon at the 2nd input gear. Accordingly, main-damper type clutch was unapp- roriate at idling.

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