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本文阐述了直喷式柴油机的燃烧噪声及其与气缸压力振荡的关系。文中给出了柴油机的燃烧噪声声压级频谱、气缸压力级频谱和燃烧振荡压力级频谱等图形。文中指出:降低燃烧压力振荡是柴油机降噪工作的重要途径。
This paper describes the combustion noise of direct injection diesel engine and its relationship with cylinder pressure oscillations. In this paper, the combustion noise sound pressure level spectrum of diesel engine, the spectrum of cylinder pressure level and the spectrum of combustion oscillation pressure level are given. The paper points out: to reduce the combustion pressure oscillation is an important way of diesel engine noise reduction.