China's independently developed high efficiency and low discharge hydrogen engine is a new type of internal combustion engine. Compared with the traditional gasoline engine and diesel engine, it has the specific advantages including high efficiency, low discharge, low cost and adaptable. It is greatly significant in reducing environmental pollution and responding to the energy crisis.

As early as 2005, ChangAn began to research the hydrogen engine and formally attained the establishment of the national "863" plan. In two years of efforts, this project has finally produced the successful operation of the hydrogen engine.