In this paper the λ response during a fast change of the throttle is studied. A mathematical model based on a manifold air flow model and a fuel film model with two deposit parameters and two time constants was used, together with a time delay between air and fuel supply to the engine during the transient, for data matching of the measurements.It was found that a single deposit parameter (X) and one time constant (τ) together with a time delay (Δt) describe the fuel film behaviour during a transient very well.It was also found that a large part of the λ excursion is due to the time delay effect. This applies particularly to positive transients.The time delay is of major importance for the λ excursion peak.The fuel film effect is dominating during negative transients.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    An Analysis of Air to Fuel Ratio Response in a Multi Point Fuel Injected Engine Under Transient Conditions


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Fuels & Lubricants Meeting & Exposition ; 1993



    Publication date :

    1993-10-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    An analysis of air to fuel ratio response in a multi point fuel injected engine under transient conditions

    Almkvist,G. / Eriksson,S. / Volvo Car,Engine Dev.,SE | Automotive engineering | 1993





    Study on the Transient Response of a Fuel injected (FI) Motorcycle Engine

    Manickam, Murugesan / Rajamani, Parthiban / Subramanian, Sakthi Saravanan | SAE Technical Papers | 2010