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Abstract |
An Analytic Model for Cylinder Pressure in a Four Stroke SI Engine
SAE Technical Paper 2002-01-0371 Lars Eriksson and Ingemar Andersson Vehicular Systems, Linköping
University, SWEDEN An analytic model for cylinder pressures in spark ignited engines
is developed and validated. The main result is a model expressed in
closed form that describe the in-cylinder pressure development of an
SI engine. The method is based on a parameterization of the ideal
Otto cycle and takes variations in spark advance and air-to-fuel ratio
into account. The model consists of a set of tuning parameters that
all have a physical meaning. Experimental validation on two engines
show that it is possible to describe the in-cylinder pressure of a
spark ignited combustion engine operating close to stoichiometric
conditions, as a function of crank angle, manifold pressure, manifold
temperature and spark timing.
Lars Eriksson and Ingemar Andersson
SP-1702, 2002
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