由于石油危机,为了竞争,今后将越来越需要改进船舶的总经济性。因此,降低燃油成本比以往任何时候都显得重要。对于柴油机制造商来说,降低成本的常用方法是降低燃油消耗率,使柴油机能燃烧尽可能廉价的燃油,并能在各种负荷下运转。同时还考虑包括发电和螺旋桨速度在内的总能量消耗成本。作者介绍了为什么效率达到46%的PC4型中速柴油机是今天所用效率最高的船用柴油机之一。 Due to the oil crisis, in order to compete, there will be an ever-increasing need to improve the overall economics of the ship. Therefore, reducing fuel costs is more important than ever. For diesel manufacturers, a common way to reduce costs is to reduce fuel consumption so that the diesel engine can burn the fuel as cheaply as possible and operate under a variety of loads. The total energy costs, including generation and propeller speed, are also taken into account. The author explains why a PC4 medium speed diesel engine with 46% efficiency is one of the most efficient marine diesel engines used today.