The ignition and combustion of natural gas directly injected into a multi-cylinder two-stroke diesel engine and ignited by a pilot liquid diesel injection has been investigated experimentally and with the aid of numerical simulation. Measurements of cylinder pressure and thermal efficiency were supplemented by endoscopic observation of flame development and three-dimensional numerical simulation of the ignition and combustion process.With gas/diesel fueling and appropriate injection timing, ignition delay and combustion duration can be about the same as with 100% diesel liquid fueling. Flame photography indicates that, for the same liquid diesel flow rate, subsequent injection of natural gas has a negligible effect on the ignition delay of the liquid fuel. Relative ignition timing is of major importance in obtaining successful combustion.
Ignition Delay and Combustion Duration with Natural Gas Fueling of Diesel Engines
Sae Technical Papers
1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1996
1996-10-01
Conference paper
English
Ignition delay and combustion duration with natural gas fueling of Diesel engines
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