A Reduced Order Model of Turbo Charged Diesel Engine

A turbo charged diesel engine without any governor or controller is normally represented by a fourth order model. When the inlet and outlet manifolds are small, their effect is neglected and the model is then simplified to a second order model and does not reflect the effect of the two manifolds. The present paper uses model order reduction technique by Anderson, by separating the dynamics into fast & slow modes and assuming that the fast modes settle quickly. The model has been validated through simulation using typical data. It has been shown that there is a close resemblance in step response between the fourth order and the reduced order model for all the four states. On the other hand, a simpified model, obtained by neglecting the manifold volumes would give erroneous results.