Identification of one-zone heat release parameters for SI engine Online publication date: Wed, 29-Apr-2009
by Samir Saraswati, Satish Chand
International Journal of Modelling, Identification and Control (IJMIC), Vol. 6, No. 4, 2009
Abstract: Heat release analysis is used for predicting the gross heat release characteristic from the pressure data inside the cylinder. In present work, simulation of one-zone heat release model, which involves large number of physically important parameters, is done in Matlab/Simulink environment. The objective here is to find out that how many of these parameters can be reliably determined using in-cylinder pressure measurements. Levenberg-Marquardt optimisation method is used to minimise a least-square objective function for determining the parameters. The smaller value of the objective function is not enough to validate the quality of parameters estimated; hence, their reliability is determined by studying the logarithmic P-V diagram. A methodology is also proposed to find out the parameters, which cannot be identified reliably. The present approach helps in identifying one-zone heat release parameters systematically and prevents the use of arbitrary values of parameters.
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