Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference (한국윤활학회:학술대회논문집)

Korean Tribology Society (한국트라이볼로지학회)
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Experimental Study on the Tribological Characteristics including of Oil Leakage in Valve Stem

  • Lee, Il-Kwon (Department of Automotive Engineering, Daelim College) ;
  • Chun, Yoon-Soo (Department of Automotive Engineering, Daelim College) ;
  • Kim, Sung-Won (Department of Mechanical Engineering, Hongik University) ;
  • Kim, Chung-Kyun (Department of Mechanical Engineering, Hongik University)
  • Published : 2002.10.21
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Abstract

The purpose of this paper is to investigate the leakage characteristics of the valve stem in the gasoline engines. Especially, three factors affecting oil leakage are the power cylinder, engine head system, and the positive crankcase ventilation system. Which is the most variables, analysis difficulty is the valve stem seal characteristics. The testing system is used with oil motoring system. The leakage of an engine is analyzed for the cylinder temperature, atmosphere pressure, positive pressure, negative pressure, revolution of the camshaft and the surface roughness of the valve stem.

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