1前言 1973年世界性石油危机以来,柴油机燃油质地逐年下降,其着火性与燃烧性能趋于恶化。就连船舶发电机组用的中小型中速机所使用的燃油粘度,竟也高达3500s(雷氏1号/100°F)左右。柴油机燃烧室内的燃烧现象极其复杂,确切掌握燃烧变化状况,对考核所研制的柴油机燃烧性能,确保现有柴油机的耐久性、可靠性均是不可缺少的资料。为了分析现有中小型中速机的燃烧状况,本文作者用6PL-24型柴油机(缸径240mm,行程320mm,转速720r/min,功率1125PS)进行了燃烧试验。试验用燃油是以减压蒸镏残渣 1 Foreword Since the world oil crisis in 1973, the quality of diesel engine fuel has been declining year by year, and its ignitability and combustion performance have deteriorated. Even the medium and small medium sized medium speed engines used in marine generator sets have a fuel viscosity of up to 3500s (Rey 1/100 ° F). The phenomenon of combustion in the combustion chamber of diesel engine is extremely complicated, and the change of combustion state is accurately grasped. It is indispensable to evaluate the combustion performance of the diesel engine developed to ensure the durability and reliability of the existing diesel engine. In order to analyze the combustion conditions of the existing small and medium-sized medium-speed machines, the author carried out the combustion test with a 6PL-24 diesel engine (bore diameter 240mm, stroke 320mm, rotation speed 720r / min, power 1125PS). The test fuel is distilled off under reduced pressure residue