Mean Value Modelling of the Intake Manifold Temperature
Abstract
The emission legislations and the new On Board Diagnostics (OBD) legislations
are becoming more strict and making the demands on control and
fault detection higher. One way to control and diagnose the engine is to use a
control/diagnose strategy based on physical models and therefore better models
are necessary. Also, to be competitive and meet the markets demand of
higher power, longer durability and better fuel economy, the models needs to
be improved continuously. In this thesis a mean value model of the intake
system that predicts the charge air temperature has been developed. Three
models of different complexity for the intercooler heat-exchanger have been
investigated and validated with various results. The suggested intercooler
heat-exchanger model is implemented in the mean value model of the intake
system and the whole model is validated on three different data sets. The
model predicts the intake manifold temperature with a maximum absolute
error of 10:12K.
Keywords: mean value engine modelling, intercooler
Anders Holmgren
2005

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