%A Nicol? Giorgetti
%A Alberto Bemporad
%A Ilya Kolmanovsky
%A Davor Hrovat
%K Combustion; Control design; Cost function; Engine cylinders; Fuels; Logic; Optimal control; Sparks; Timing; Torque control 
%X This paper illustrates the application of hybrid
modeling and receding horizon optimal control techniques
to the problem of air-to-fuel ratio and torque management
in advanced technology gasoline direct injection stratified
charge (DISC) engines. A DISC engine represents an example
of a constrained hybrid system, because it can operate
in two discrete modes (stratified and homogeneous) and
because the mode-dependent constraints on the air-to-fuel
ratio and on the spark timing need to be enforced. The paper
extends the prior work by the authors [1] and reports the
development of an explicit controller which implements the
optimal solution using piecewise affine functions of the state, thereby avoiding the need for on-line optimization. Strategies to simplify the explicit controller by reducing the number of regions in its characterization are discussed.
%D 2005
%L eprints522
%C 20th-23th June 2005 
%B Symposium on Industrial Electronics
%R 10.1109/ISIE.2005.1528920
%J Symposium on Industrial Electronics
%P 247-252
%T Explicit hybrid optimal control of direct injection stratified charge engines
%V 1
%I IEEE