燃烧噪声对发动机的噪声有重要影响,从时域和频域两个方面对生物制气-柴油双燃料发动机的燃烧噪声进行了综合评价,计算出燃烧总声压级,与纯柴油发动机的相关数据进行了比较,分析了不同的供油提前角、负荷和转速对燃烧噪声的影响.结果表明:燃烧噪声随负荷及转速变大而变大;在相同负荷下供油提前角变大其燃烧噪声变大,燃用生物制气双燃料发动机比燃用纯柴油的燃烧噪声低约A声压级3 dB. Combustion noise has an important influence on the noise of the engine. The combustion noise of the biogas-diesel dual-fuel engine is evaluated comprehensively in both time and frequency domains, and the total sound pressure level of combustion is calculated, which is related to the pure diesel engine The results show that the combustion noise increases with the increase of load and speed, and the fuel supply advance angle becomes larger under the same load, which leads to the combustion The noise becomes larger, and the combustion noise of the diesel-fueled bi-fuel engine burning diesel fuel is about 3 dB lower than that of the pure diesel fuel.