eprintid: 522
rev_number: 8
eprint_status: archive
userid: 7
dir: disk0/00/00/05/22
datestamp: 2011-07-27 08:47:30
lastmod: 2011-08-04 07:29:08
status_changed: 2011-07-27 08:47:30
type: book_section
metadata_visibility: show
contact_email: alberto.bemporad@imtlucca.it
item_issues_count: 0
creators_name: Giorgetti, Nicolò
creators_name: Bemporad, Alberto
creators_name: Kolmanovsky, Ilya
creators_name: Hrovat, Davor
creators_id: 
creators_id: alberto.bemporad@imtlucca.it
creators_id: 
creators_id: 
title: Explicit hybrid optimal control of direct injection stratified charge engines
ispublished: pub
subjects: QA
subjects: TL
divisions: CSA
full_text_status: none
keywords: Combustion; Control design; Cost function; Engine cylinders; Fuels; Logic; Optimal control; Sparks; Timing; Torque control 
abstract: 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.
date: 2005
date_type: published
publication: Symposium on Industrial Electronics
volume: 1
publisher: IEEE
place_of_pub: 20th-23th June 2005 
pagerange: 247-252
event_title: IEEE International Symposium on Industrial Electronics, 2005
event_location: 20th-23th June 2005 
event_dates: Dubrovnik, Croatia
id_number: 10.1109/ISIE.2005.1528920
refereed: TRUE
isbn: 0-7803-8738-4 
book_title: Symposium on Industrial Electronics
official_url: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1528920&isnumber=32652
citation:   Giorgetti, Nicolò and Bemporad, Alberto and Kolmanovsky, Ilya and Hrovat, Davor  Explicit hybrid optimal control of direct injection stratified charge engines.   In:  Symposium on Industrial Electronics.   IEEE, 20th-23th June 2005 , pp. 247-252.  ISBN 0-7803-8738-4       (2005)