Browse Publications Technical Papers 2001-01-1959

A Study on In-Cylinder Injection of Low Pressure Natural Gas for Performance Improvement of Small Sized Two-Stroke SI Engines 2001-01-1959

Small two stroke SI engines supplied with natural gas in the intake port are advantageous for low maintenance and low cost when used in co-generation systems for residential use. However in the engines with port injection systems, the unburned HC emissions are higher and thermal efficiency is lower than with 4 stroke engines. To overcome these disadvantages, an in-cylinder injection with a special low pressure injection nozzle system was attempted. The results showed that improvements in unburned HC emissions and thermal efficiency are possible due to the remarkable reduction in scavenging loss and the lean combustion.


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