한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제14권4호
  • /
  • Pages.139-148
  • /
  • 2006
  • /
  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

자동차 엔진 밸브트레인의 타음감소를 위한 캠 형상 설계

Cam Profile Design for Impulsive Noise Reduction of Automotive Engine Valve Train

  • 안기용 (울산대학교 자동차선박기술대학원) ;
  • 김도중 (울산대학교 기계자동차공학부)
  • An, Ki-Yong (Institute of e-Vehicle Technology, Ulsan University) ;
  • Kim, Do-Joong (Department of Mechanical and Automotive Engineering, Ulsan University)
  • 발행 : 2006.07.01
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초록

Valve train is one of the important noise sources in idling engines. Valve train noise comes mostly from two different impacts. One is the impact between cam and tappet at the beginning of the valve open period, which is an important source of impulsive noise of valve trains. The other is the impact between valve and valve seat at the closing of the valve open period. In case of mechanical lash adjusters, it is very difficult to control the initial impact. In this paper, we designed various types of cam profiles, especially in the opening ramp design, and investigated the effect of cam profiles on the magnitude of the initial impact. The effects that some cam design parameters have on the impulsive noise are also observed.

키워드

참고문헌

  1. S. Y. Hwang, B. S. Lim, Y. S. Lim and O. J. Kwon, 'An Experimental Study for Noise Reduction and Improvement of Sound Quality of Direct-Acting Valve Train System in Gasoline Engine,' Spring Conference Proceedings, KSAE, pp.122-129, 2004
  2. E. Kamiyama and S. Yasuhara, 'Improvement of DOHC Valve Train Noise by Analysis of Valve and Tappet Movement' SAE 911061, pp.179-185, 1991
  3. S. Ezaki, M. Masuda, H. Fujita, S. Hayashi, Y. Terashima and K. Motosugi, 'Aluminum Valve Lifter for Y oyota New V-8 Engine,' SAE 900450, 1990
  4. R. L. Norton, D. Eovaldi, J. Westbrook III, R. L. Stene, 'Effect of Valve-Cam Ramps on Valve Train Dynamics,' SAE 1999-01-0801, 1999
  5. D. J. Kim, S. H. Yoon, B. G. Park and B. S. Shin, 'A Study on Dynamic Simulation and Cam Profile Optimization for OHV Type Valve Trains,' Transactions of KSAE, Vol.4, No.1, pp.110-122, 1996