关键词: 增程式电动汽车；专用发动机；热效率；E-Power

Abstract: With the global energy crisis and the pressure of carbon emissions, the research and development of energy-efficient vehicle in the automobile industry is imminent. The Range-extended electric vehicle is a series hybrid. In the extended range vehicle, the engine does not directly drive the vehicle, but only drives the generator to generate electricity. The engine speed and vehicle speed are completely decoupled. Therefore, the working point of the engine can be controlled in the area with higher combustion efficiency to achieve the energy saving and emission reduction of the vehicle. This paper analyzes the working characteristics of extended range engine, and summarizes the technical trend of extended range electric vehicle special engine through the techni- cal analysis of Nissan E-Power engine, which is a typical extended range model, so as to provide reference for the researchers of extended range engine products.

Key words: Range-extended electric vehicle; Dedicated engine; Thermal efficiency; E-Power