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Basic study of combustion characteristics of a dual fuel gas diesel engine by using a multi-dimensional model combined with detailed chemical kinetics
Technical Paper
2001-08-0377
Sector:
Event:
JSAE Autumn Conference
Language:
Japanese
Abstract
This paper describes improvement of thermal efficiency of a dual diesel engine fueled with natural gas and pilot diesel at partial load. This dual fuel operation on gas mixer yields high thermal efficiency at higher loads, however, suffered from higher THC emission and lower thermal efficiency by higher unburned fuel at lower loads. This is due to lean natural gas in the intake charge. This fewer cylinders operating to make rich natural gas in the premix charge of per one cylinder is carried out. As a result, at fewer cylinder operating, dual fuel combustion and THC emissions are improved, however it makes higher NOx emissions.