High Pressure Injection of Natural Gas in a Two Stroke Diesel Engine 902230

Three methods of introducing gas into the DDC 8V92TA engine were evaluated: post-pilot in-cylinder injection; early in-cylinder injection just after exhaust valve closure; and port injection through an air inlet port.
Post-pilot injection consistently produced the best combustion and HC emissions.
Early in-cylinder injection often resulted in severe end gas knock, but gave higher thermal efficiency than diesel in some conditions. HC emissions were considerably higher than for post-pilot injection.
Port injection gave smoother combustion than early in-cylinder injection but higher HC emissions. Its full load thermal efficiency tell between, and part load efficiency below, the other methods.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.