Estimation of the Residual Gas Fraction in an HCCI-engine using Cylinder Pressure
The residual gas fraction is an important parameter to get good
performance with high efficiency and low emissions in the
The goal in this thesis is to formulate an algorithm for
estimation of the residual gas fraction based on the cylinder
pressure. The estimation is improved if also the exhaust gas
temperature is used together with the cylinder pressure.
The formulated algorithm has then been tested on data from a
single cylinder engine running in HCCI-mode during steady state
conditions. An error of $\pm4\%$ was noted compared with the
residual gas fraction obtained from simulations.
The thesis also investigates the effects of some possible error
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Last updated: 2021-11-10