Idle Speed Control for GDI Engines using Robust

The design of an idle speed controller for automotive GDI engines is considered. A hybrid model of a GDI engine operating in stratified mode is presented. The idle speed control problem is formalized as a constrained optimal control problem where fuel consumption has to be minimized. A sub-optimal but effective and easily implementable solution is obtained by resorting to the Command Governor methodology for a discretetime abstraction of the hybrid model. Simulation results of the hybrid closed-loop system are presented