A new injector has been designed for sequential injection of high-pressure natural gas and a quantity of liquid diesel fuel directly into diesel engine cylinders late in the compression stroke. Injected a few degrees before the natural gas, the pilot liquid fuel auto-ignites and serves, as it burns, to ignite the gaseous fuel which enters the chamber as an underexpanded sonic jet generating high local turbulence. Tests on a single-cylinder two-stroke engine with full electronic control have demonstrated the capability of this fueling method to nearly match conventional diesel engine efficiency over a wide range of load and substantially reduce the emissions of oxides of nitrogen (NOx), particulate mater (PM) and carbon dioxide (CO2).


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    Title :

    Directly Injected Natural Gas Fueling of Diesel Engines


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Future Transportation Technology Conference & Exposition ; 1996



    Publication date :

    1996-08-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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