동해석을 이용한 연료펌프의 캠 형상 설계

Cam Profile Design of a Fuel Pump Using Dynamic Analysis

  • 이봉호 (계명대학교 대학원 기계공학과) ;
  • 이부윤 (계명대학교 기계자동차공학부) ;
  • 김원진 (계명대학교 기계자동차공학부)
  • 발행 : 2006.01.01

초록

This work focuses on reducing the noise and vibration levels of an LPi fuel pump, which are generated from the dynamic motions of pump elements and non-uniform flow of fuel. The noise and vibration levels increase as the revolution speed of the cam goes up. The fuel pump consists of five cavity cells, plungers and diaphragms, which are driven by the cam. The optimal design of the cam profile is performed to decrease the accelerations of moving Parts and to obtain a smooth hydraulic force through a dynamic analysis of a cam-plunger mechanism. The cam-Plunger with a cavity is modeled as a 2 degrees of freedom system having non-linear contacts, the cam profile being represented in terms of Fourier series in order to determine the optimal shape of the cam. From the optimized cam Profile, the acceleration of the diaphragm is reduced in $78\%$, the hydraulic force becoming smoother in case that the hydraulic force is rapidly dropped.

키워드

참고문헌

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