Engine calibrations are inexpensive methods for reducing exhaust emissions since only software modifications are required. The California Air Resources Board staff conducted a test program to investigate the effectiveness of engine calibration techniques to reduce the newly regulated aggressive driving exhaust emissions or “off-cycle” emissions. Consisting of stoichiometric and rich “bias” calibration, these engine calibration techniques were applied to fourteen late-model vehicles. The engine calibration techniques reduced the off-cycle emissions substantially on most vehicles. To comply with the proposed off-cycle standards for California low-emission vehicles and ultra-low-emission vehicles, these techniques will be a cost-effective method to reduce off-cycle emissions.


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    Title :

    Effectiveness of Engine Calibration Techniques to Reduce Off-Cycle Emissions


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Spring Fuels & Lubricants Meeting & Exposition ; 1997



    Publication date :

    1997-05-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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