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논문 기본 정보

자료유형
학술대회자료
저자정보
이남훈 (한국지엠) 윤재원 (한국지엠) 이정근 (한국지엠)
저널정보
한국자동차공학회 한국자동차공학회 춘계학술대회 2013 KSAE 부문 종합학술대회
발행연도
2013.5
수록면
655 - 660 (6page)

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초록· 키워드

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GM Korea has developed new CVT mini vehicle reflecting customers concerns about low fuel economy at high speed and lack of power in the current AT vehicle. Currently adopting CVT system is increasing due to following reasons. 1) CVT can provide better fuel economy than AT by enabling the engine to run at its most efficient rpm for a range of vehicle speeds and continuous gear ratio change. 2) It can be used to maximize the performance of a vehicle by allowing the engine to turn at the rpm at which it produces maximum torque and power. 3) It is more comfortable than AT by minimizing shift shock with continuous gear ratio change. But additional N&V issues, result in weight increase compare with AT, should be treated and optimized well. During the CVT vehicle development, rumble noise in vehicle interior was issued. Generally main source of rumble noise is crankshaft and powertrain bending but main contributor is structure-born noise transferred by engine and transmission mounting system. Rumble noise is problematic if mounting system design is not optimized for the powertrain vibration mode or it can’t minimize or amplify the powertrain rumble vibration. This paper shows root-cause of rumble noise and its improvement process which appeared in the CVT vehicle development process. Applying Red-X method, WOW BOB vehicles were chosen to compare the noise level difference and to estimate contribution and improvement potential of each component and N&V test have been carried out for these selected items.

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Abstract
1. 서론
2. 럼블 소음 현상
3. Red-X 기법에 의한 평가
4. 파워트레인 및 차량의 원인 분석
5. 결론
References

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UCI(KEPA) : I410-ECN-0101-2014-550-002586996