Modelling of the Exhaust Gas Temperature for Diesel Engines
Models for the exhaust gas temperature are developed and validated
for a turbo charged diesel engine. The area of use for
the models are on-board diagnostics or model-based control. Data,
for model building and validation, comes from measurements on a
Scania turbo charged diesel engine equipped with variable geometry
turbine and exhaust gas recirculation. Different models are
validated and an extension of the ideal Seliger cycle is suggested
as the model of choice.
With access to fuel and gas mass
flows, inlet temperature and inlet and outlet pressures, the
Seliger cycle model estimates the exhaust gas
Static validations are made with exhaust gas
temperatures between 550 K and 950 K, at constant engine speed.
Under these conditions the Seliger cycle model, with parameters
fitted to engine data, show a maximum relative error of 2%. Without
any parameter fitting to engine data, the maximum relative
error is 5%.
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Last updated: 2019-12-12