An experimental investigation was performed on an engine dynamometer to study in cylinder pressure curve and combustion parameters variability with ethanol addition. It was used a Flex-Fuel engine, 1.4 L, 4 cylinders, with a programmable engine control unit to optimize the calibration for different blends of Brazilian gasoline and hydrous ethanol. Engine was calibrated for maximum break torque limited by knocking. In-cylinder pressure was measured by using a pressure sensor installed on the spark plug and analyzed by a combustion data system. Combustion duration, mass fraction burned, indicated mean effective pressure (IMEP) and others were calculated based on in-cylinder pressure curve data. The combustion variability was analyzed from 300 recorded engine cycle for each operating condition. Results for some operating conditions indicated that ethanol addition can reduce combustion variability on a non linear pattern.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    In Cylinder Pressure Curve and Combustion Parameters Variability with Ethanol Addition


    Additional title:

    Sae Technical Papers



    Conference:

    21st SAE Brasil International Congress and Exhibition ; 2012



    Publication date :

    2012-10-02




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Intra-Cylinder Combustion Pressure Sensing

    Morris,J.E. | Automotive engineering | 1987


    Intra-Cylinder Combustion Pressure Sensing

    Morris, J. E. | SAE Technical Papers | 1987


    Estimation of Combustion Variability Using In-cylinder Ionization Measurements

    Wickström, Nicholas / Byttner, Stefan / Rögnvaldsson, Thorsteinn | SAE Technical Papers | 2001


    Estimation of combustion variability using in-cylinder ionization measurements

    Byttner,S. / Roegnvaldsson,T. / Wickstroem,N. et al. | Automotive engineering | 2001


    Effects of EGR Addition onto Combustion Stability and Alternator Performance Variability of a Small, Single-Cylinder Diesel Generator

    Covington, April Nicole / Johnson, Derek / Besch, Marc Cyrill et al. | SAE Technical Papers | 2016