Title: Turbocharged spark ignition engine modelling and control strategy

Authors: D. Khiar, J. Lauber, T.M. Guerra, T. Floquet, G. Colin, Y. Chamaillard

Addresses: LAMIH, UMR CNRS 8530, Universite de Valenciennes, Le Mont Houy, 59313 Valenciennes Cedex 9, France. ' LAMIH, UMR CNRS 8530, Universite de Valenciennes, Le Mont Houy, 59313 Valenciennes Cedex 9, France. ' LAMIH, UMR CNRS 8530, Universite de Valenciennes, Le Mont Houy, 59313 Valenciennes Cedex 9, France. ' LAGIS, UMR CNRS 8146, Ecole centrale de Lille, cite scientifique, BP 48, 59651 Villeneuve d'Ascq Cedex, France. ' LME, EA 1206, Universite d'Orleans, 8, rue Leonard de Vinci, 45072 Orleans Cedex 2, France. ' LME, EA 1206, Universite d'Orleans, 8, rue Leonard de Vinci, 45072 Orleans Cedex 2, France

Abstract: This paper deals with the non-linear modelling and control of a turbocharged spark ignition engine. In the automotive industry, downsizing-based turbocharging is considered as a powerful technique to improve engine performances as fuel economy, pumping loss reduction to increase engine efficiency or driveability optimisation. This method is largely used for diesel engines. For gasoline engines, it is more complex in terms of control. In this work, a simplified control-oriented model is presented and validated using a Smart MCC three cylinders engine data. Then, based on this model, a fuzzy non-linear control law is calculated to achieve the fuel consumption and pumping losses reduction by setting the engine states to a given profile.

Keywords: turbocharged SI engines; spark ignition engines; control strategy; nonlinear control; turbocharging; engine performance; SI engine modelling; fuzzy control; fuel consumption; pumping losses; vehicle design.

DOI: 10.1504/IJVD.2008.022579

International Journal of Vehicle Design, 2008 Vol.48 No.3/4, pp.255 - 270

Published online: 16 Jan 2009 *

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