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Study on combustion characteristics of lean mixture ignited by diesel fuel injection

✍ Scribed by Daiji Kotani; Koji Yoshida; Hideo Shoji; Hidenori Tanaka

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
294 KB
Volume
19
Category
Article
ISSN
0389-4304

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✦ Synopsis

We have investigated combustion characteristics of lean gasoline-air pre-mixture ignited by diesel fuel injection using a high compression direct injection diesel engine. Gasoline was supplied as a uniform lean mixture by using carburetors, and diesel fuel was directly injected into the cylinder. It was confirmed that the lean mixture of air-fuel ratio between 150 and 35 could be ignited and burned by this ignition method. As the diesel fuel injection increased, HC concentration decreased, and NO and CO concentration increased. The exhaust gas emission of pollutants could be reduced when lean mixture was ignited by an optimum diesel fuel injection.

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This study aimed to reduce NO V and soot by creating a more homogeneous lean fuel distribution in a diesel spray using high-pressure fuel injection and a micro-hole nozzle. This injection system shortened the ignition delay, but a homogeneous lean fuel distribution in the diesel spray was not achiev