Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Analysis of Frictional Characteristics of Direct-Acting OHC Valve Train System Equipped with HLA

HLA를 장착한 직접 구동형 OHC 밸브 트레인 시스템의 마찰 특성 해석

  • Published : 1998.05.01
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Abstract

A dynamic model of direct-acting OHC valve train system has been used to determine the load conditions in the system. The modified equations for calculating the friction forces between cam and HLA, and at a camshaft bearing have been defined considering the lubrication conditions. Then, to understand the frictional characteristics in the system, a parameter study has been performed. As the results of the analysis, valve spring stiffness and preload have great effects on the friction in the system, but the effects of other parameters are negligible. So, how to design the valve train system with respect to the reduction of friction is to minimize the valve spring stiffness and preload in the limit of satisfying the dynamic constraints.

Keywords

References

  1. Tribology Series 26 Vngine Tribology C.M. Taylor
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