Friction Characteristics of Piston Assembly (II) -Experiment-

피스톤계 마찰 특성 (II) -실험적 연구-

  • 조명래 (현대자동차 파워트레인연구소) ;
  • 하경표 (현대자동차 파워트레인연구소) ;
  • 김중수 (현대자동차 파워트레인연구소) ;
  • 오대윤 (현대자동차 파워트레인연구소) ;
  • 한동철 (서울대학교 기계항공공학부)
  • Published : 2003.01.01


The aim of this paper is to investigate the friction characteristics of piston assembly, which composed of ring pack and piston skirt. The friction force of piston assembly was measured by using the movable liner in the single cylinder engine, and the various parameters were tested. The friction force was suddenly increased at the expansion stroke due to higher cylinder pressure. The viscous friction was dominant at the mid stroke, but the boundary friction was dominant at the top and bottom dead centers. Through the experiment, we could validate previous theoretical study, and confirm that th e radial clearance and ring tension were very effective to reduce friction loss of piston assembly.


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