Study of the stratified charge and stable combustion in DI gasoline engines

Abstract

A new combustion method for DISC engines was developed. It has a double structure combustion chamber known as “Caldera”. This method makes possible a perfect un-throttling operation, and a fuel consumption equal to a diesel engine is achieved. In the output of the DISC engine, a stoichmetric combustion and a high torque are achieved by controlling the fuel injection timing with an electro-magnetic injection device. With regard to emission regulations, a heavy EGR including residual gas greatly decreases NO x and HC emissions simultaneously.