Title: Modelling of an internal combustion engine using power-oriented graphs and electrical analogy

Authors: F. Grossi; A. Palladino; R. Zanasi; G. Fiengo

Addresses: Department of Computer Science and Engineering, Università di Modena e Reggio Emilia, 41125 Modena, Italy. ' Engineering Department, Università degli Studi del Sannio, 82100 Benevento, Italy. ' Department of Computer Science and Engineering, Università di Modena e Reggio Emilia, 41125 Modena, Italy. ' Engineering Department, Università degli Studi del Sannio, 82100 Benevento, Italy

Abstract: In this paper, the power-oriented graphs (POG) technique is used for modelling an internal combustion engine through electrical analogy. The aim of the authors, starting from an analogy with electrical systems, is to simplify the approach eliminating the space dynamics, while preserving the time dynamics. In this way, one can obtain an engine description similar to an electric circuit, with all the useful consequences in terms of existence and numerical availability of the solution. The advantages are in the specific correspondence found between the engine components and variables with electrical counterparts. The main benefit achievable with this methodology is the simplicity to compose the whole engine model and customise it including the differential equations of the engine in state space form. The POG technique is a graphical modelling technique which uses only two basic blocks for modelling physical systems and the state space mathematical model of a system can be 'directly' obtained from the corresponding POG representation.

Keywords: modelling; internal combustion engines; power-oriented graphs; POG; engine dynamics; identification; electrical circuits; differential equations.

DOI: 10.1504/IJMIC.2012.047120

International Journal of Modelling, Identification and Control, 2012 Vol.16 No.2, pp.122 - 133

Published online: 31 May 2012 *

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