The acquisition of the engines with low energy consumption,high performance and light emission has long been the pursuing goal in the field of automobile manufacture.The current energy crisis is becoming increasingly severe and the energy conservation and environmental protection has been advocated positively.Under these circumstances,the realization of this goal is of great significance.This paper reviews on the new techniques for the modem diesel engine in the automobile and the petrol engine.It also sumnarizes the specific application of the new techniques for the modern petrol engine and looks forward to the development prospects of the new techrtiques for the modem petrol engine.