TY  - CHAP
AV  - none
SP  - 247
TI  - Explicit hybrid optimal control of direct injection stratified charge engines
Y1  - 2005///
M1  - 1
A1  - Giorgetti, Nicoḷ
A1  - Bemporad, Alberto
A1  - Kolmanovsky, Ilya
A1  - Hrovat, Davor
UR  - http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1528920&isnumber=32652
CY  - 20th-23th June 2005 
KW  - Combustion; Control design; Cost function; Engine cylinders; Fuels; Logic; Optimal control; Sparks; Timing; Torque control 
SN  - 0-7803-8738-4 
EP  - 252
ID  - eprints522
N2  - 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.
PB  - IEEE
T2  - Symposium on Industrial Electronics
ER  -