Abstract

A multi-polynomial method is proposed to synthesize DRRD cam profiles. A cam lift duration s divided into 10 sections, each of them is expressed by a polynomial equation. 12 design variables are extracted from the cam profile displacement, velocity, and acceleration curves. Because all the design variables have physical meanings which are familiar to most cam designers, it is easy to imagine a profile shape from the design variables. The design envelope of the method is wide enough to be used in DRRD automotive cam designs. Polydyne cams, widely used in automotive engines, are included into the envelope. Unlike Polydyne cams, the method provides capability of wide velocity factor variations, which gives much flexibility in flat-faced tappet design. Area factor of profiles designed by the method can be increased 5-10% compared to those of Polydyne cams without increasing acceleration factor. The method is especially useful for cam profile optimizations.

주제어

#캠 형상 설계   #캠 형상 합성   #캠 형상 최적 설계  

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1. 1996. "A Study on Dynamic Simulation and Cam Profile Optimization for OHV Type Valve Trains" 한국자동차공학회논문집 = Transactions of the Korean Society of Automotive Engineers, 4(1): 110~122  원문보기 상세보기