Abstract: The power output of a CRDI engine at any particular cycle depends on the oxidation of diesel inside the cylinder. As air-fuel ratio should be maintained within tight limits; the amount of air available inside the cylinder determines the maximum power output at a particular cycle. During acceleration mode and particularly during turbo lag periods, the quantity of air available in conventional CRDI engines is not sufficient to meet the desired torque demand. To overcome the problems encountered during acceleration and deceleration; a novel concept and control strategy are presented in this paper.