Modeling and control of fuel to air ratio in an internal combustion engine with unknown evaporation time and fuel fraction impinging manifold's wall

Abstract EN

In this paper we develop a model for fuel to air ratio (FAR) in internal combustion engine (I.C.

E).

Based on this model, we can represent the FAR in terms of the fuel injected to the manifold, evaporation time, and the part of fuel that impinges the wall.

This model is derived in this paper from other models existing in the literature in (I.

C.

E).

The importance of this proposed model is represented in providing a controllable dynamics that allows us to design a control law for achieving a desired FAR in spite of unknown evaporation time and injected fuel fraction impinging the wall.

This usefulness of the model is demonstrated in this paper throughout designing a control law to make the FAR tracks a desired value using Routh-Herwitze criterion.

Both of the proposed model and control law are proved mathematically.

Moreover, a numerical simulation is performed and shows the validity of the proposed model and designed controller.