Title: Rapid virtual prototyping and dynamics analysis of a common rail injection system for gasoline engines

Authors: Matteo Corno, Sergio Matteo Savaresi, Riccardo Scattolini, Emilio Comignaghi, Marco Sofia, Antonio Palma, Eduardo Sepe

Addresses: Dipartimento di Elettronica e Informazione, Politecnico di Milano, Piazza L. da Vinci, 32, Milano 20133, Italy. ' Dipartimento di Elettronica e Informazione, Politecnico di Milano, Piazza L. da Vinci, 32, Milano 20133, Italy. ' Dipartimento di Elettronica e Informazione, Politecnico di Milano, Piazza L. da Vinci, 32, Milano 20133, Italy. ' FIAT Powertrain Technologies S.p.A., Viale Alfa Romeo, Arese (Milano) 20020, Italy. ' FIAT Powertrain Technologies S.p.A., Viale Alfa Romeo, Arese (Milano) 20020, Italy. ' Elasis S.C.p.A, Gasoline EMS Dpt., Via ex Aeroporto s.n., Pomigliano d'Arco (Napoli) 80038, Italy. ' Elasis S.C.p.A, Gasoline EMS Dpt., Via ex Aeroporto s.n., Pomigliano d'Arco (Napoli) 80038, Italy

Abstract: The topic of this article is the modelling, parameter estimation and analysis of a common rail direct injection system of a gasoline engine. First the system is described and the functional role of each element is highlighted. An analytical first-principles simulator of the system is developed, using a finite-difference approach. Model parameters are identified and the simulator is validated using real data. Using the validated simulator, an analysis of the system dynamics is developed. This analysis provides a deep insight in the trade-offs of the choice of some components of the injection system. It is shown how this approach can be very useful to make a |virtual| (simulator-based) definition of the system. From the methodological point of view, the most interesting feature of the analysis presented in this article is the fact that mechanics, fluid-dynamics and control algorithms are analysed as a whole, in a genuine and modern |co-design| approach.

Keywords: common rail injection systems; pressure waves modelling; automotive systems; gasoline engines; distributed-parameter systems; parameter estimation; rapid prototyping; dynamics analysis; virtual prototyping; mechanics; fluid dynamics; control algorithms; co-design; vehicle systems modelling; finite difference method.

DOI: 10.1504/IJVSMT.2009.029175

International Journal of Vehicle Systems Modelling and Testing, 2009 Vol.4 No.1/2, pp.17 - 42

Published online: 08 Nov 2009 *

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