인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
개인구독
소속 기관이 없으신 경우, 개인 정기구독을 하시면 저렴하게
논문을 무제한 열람 이용할 수 있어요.
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Gasoline Direct Injection(GDI) engines use a high-pressure injection system to deliver fuel directly into the combustion chamber. In contrast, Port Fuel Injection(PFI) engines inject fuel into the intake port. This difference in injection pressure and system significantly affects engine noise characteristics. This study investigates the primary causes of impulsive noise in GDI engines through in-vehicle tests, injector modal analysis, and injection noise measurements. Comparative in-vehicle tests between GDI and PFI engines showed a significant increase in noise within the 10 kHz range for GDI engines. This increase in noise was closely related to the longitudinal vibration mode of the GDI injector. Furthermore, injection noise measurements confirmed that impulsive noise, generated by injector needle operations, contributes to the increase in noise in this frequency band. To determine the exact noise components originating from the injector, a combination of the Prony method and Empirical Mode Decomposition was applied, which identified the 10 kHz frequency component as the primary impulsive signal. This study provides fundamental insights into the high-frequency noise mechanisms in GDI engines, offering valuable data for future noise reduction technologies and contributing to improved vehicle noise and vibration performance.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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UCI(KEPA) : I410-151-25-02-091245303