Development of Control Technology for New Direct Injection Gasoline Engine

Abstract

Modern engines have kept increasing number of operating parameters to achieve better fuel economy and satisfy the driver′s desire to accelerate at will. We developed a new gasoline direct injection engine with super high compression ratio which needs intake and exhaust variable valve timing and split injection system to be a Miller cycle engine and also be an Otto when more torque is required. This paper presents some of the control strategies we developed to overcome the difficulty of air and air to fuel ratio control for the engine.