自一九七三年发生石油危机以来,燃油价格暴涨,因而燃油经济性已成为船用柴油机设计时考虑的首要因素。本文论述了近十多年来主要柴油机制造厂为了提高燃油经济性所采取的措施和获得的成就,并指出目前低速柴油机的主要结构已趋于相同:超长冲程、带空气弹簧的直流气阀扫气式超低速柴油机。 Since the oil crisis in 1973, the price of fuel has skyrocketed. As a result, fuel economy has become the primary consideration in the design of marine diesel engines. This article discusses the measures and achievements made by major diesel engine manufacturers in recent decades to improve fuel economy and points out that the main structures of low-speed diesel engines tend to be the same: ultra-long stroke, air valve with air spring Scavenging ultra-low-speed diesel engine.