This paper presents a new approach of Air Fuel Control (AFR) control strategy based on non-linear dynamics models of the engine air and fuel processes. Higher demands for lower engine exhaust emissions require a more accurate control of the air-fuel ratio during transient operations. A model-based air-fuel ratio control was applied to a production multipoint port injection engine with the initial constraint to keep the original sensors and actuators. The control strategy contains real-time engine models which describe air, fuel and sensors dynamics. In the final step, the control structure was implemented on a production car and evaluated on a chassis dynamometer. Several experiments with different transient conditions have shown reduced air-fuel ratio excursions in magnitude and duration compared to the standard strategy. Moreover, the calibration process was considerably easier than usual and required less testing on the car.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Air Mass Flow Rate Observer Applied to SI AFR Control


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    1995 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1995



    Publication date :

    1995-10-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Air mass flow rate observer applied to SI AFR control

    Corde,G. / Bianco,Y. / Lecluse,Y. et al. | Automotive engineering | 1995


    PI-observer techniques applied to mechanical systems

    Kirchenkamp, Svenja | Tema Archive | 2010


    PI-observer techniques applied to mechanical systems

    Kirchenkamp, Svenja | TIBKAT | 2010



    Robust Observer Roll Rate Sensor Fault Detection

    Kerstens, Wesley | SAE Technical Papers | 2017