LiU startsida
Abstract |
Requirements for and a Systematic Method for Identifying Heat-Release Model Parameters
Heat release analysis by using a pressure sensor signal is a well
recognized technique for evaluation of the combustion event, and also
for combustion diagnostics. The analysis includes tuning of several
parameters in order to accurately explain measured data. This work
presents and investigates a systematic method for estimating
parameters in heat release models and minimizing the arbitrary
choices. In order for the procedure to be systematic there are also
the requirements on the model, that it includes no inherent
ambiguities, like over-parameterization with respect to the parameters
and to the information contained in the measurements.
The fundamental question is which parameters, in the heat release
model, that can be identified by using only cylinder pressure data.
The parameter estimation is based on established techniques, that
constructs a predictor for the model and then minimizes a
least-squares objective function of the prediction error. The study
is performed on data measured on a SAAB 2.3~liter, four stroke four
cylinder, normally aspirated, gasoline engine.
Lars Eriksson
1998
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Last updated: 2021-11-10
