ON THE POSSIBILITY TO IMPROVE COMMERCIAL VEHICLE SI ENGINE OPERATION WHEN FUELED BY HYDROGEN DIRECT INJECTION

Autor/autori: Alexandru RACOVITZA, Bogdan RADU, Radu CHIRIAC


Abstract: The use of the spark ignition engines for passenger cars under the more and more restrictive and difficult in reaching emissions legislation standards seams to become attractive for the next period. The new technologies of fueling and air-fuel mixtures formation as stratified charges by gasoline and hydrogen in-cylinder direct injection, associated with methods of downsizing and downspeeding offer new perspectives to increase spark ignition engines efficiency. H2- O2 type fuels, with low spark-energy requirement, wide flammability range and high burning velocity maintain as important candidates for being used as fuels in spark-ignition engines, also offering CO2 and HC free combustion and lean operation resulting in lower NOx emissions. The present work is linked to a research project dedicated to the characteristics simulation study of a commercial Renault K7M710 engine fueled with Hydrogen using Direct Injection, by applying AVL BOOST simulation code.

Keywords: SI Engine, Gasoline and Hydrogen Direct Injection, Efficiency, Low Emissions.

 

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