降低油耗是汽油机正向开发的关键目标和驱动力。基于单缸最优原则，通过概念设计和单缸机试验锁定核心架构设计参数。通过台架试验测试，研究气道燃烧室系统、压缩比等对燃烧效率的影响；挖掘电动废气旁通阀增压系统、外部冷却废气再循环等技术降低泵气损失的潜力；验证可变机油泵、低张力活塞环等技术对机械摩擦损失的改善效果。建立发动机降油耗技术开发体系，应用于发动机开发项目。

Fuel economy is the key target and driving force for gasoline engine performance development. Based on the principle of single cylinder optimal performance, the core architecture design parameters were determined through the concept design and single cylinder engine test. Through the performance development test, the effects of port and combustion chamber system and compression ratio on the combustion efficiency were studied. The potential of pumping loss reduction was explored by using electric waste gate turbocharger system and external cooling EGR. The effects of variable volume oil pump, low tensional force piston ring on mechanical friction loss reduction were verified. A development system of fuel consumption reduction was established, which was applied in engine development projects.