A Study of the Noise Reflection Effect of an Alternator in a 13-liter Turbo-intercooler Diesel Engine

13 리터급 터보.인터쿨러 디젤 엔진의 얼터네이터 소음 반사 효과에 관한 연구

  • 최성배 (대구카톨릭대학교 기계자동차동차공학부)
  • Published : 2003.05.01

Abstract

Engine noise consists of the noise radiated from an engine structure and noises from engine ancillaries such as a turbocharger fuel injection system, and alternator. The noise of these ancillaries might be incorrectly evaluated in the aspect of the noise contribution to engine noise because the noise reflection effect of their neighbor engine structure is easily ignored. Consequently, noise source identification should be misled. This study investigates the fact that the engine structure located around an alternator reflects alternator noise, and the reflected noise acts as another alternator noise source in a heavy-duty diesel engine. The result shows that the alternator noise can be correctly estimated in engine noise by properly including the noise reflection effect.

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