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Cylinder-to-cylinder deviations on combustion at pilot injection and idling in DI diesel engines
Published October 23, 2001 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
Pilot injection is one of the effective methods to reduce NOx and noise in DI diesel engines. But the fuel injection behavior with a very small quantity of pilot fuel is very unstable. Thus cylinder-to-cylinder deviations in injection mass and spray formation occur. This study attempted to investigate the correlation between the cylinder-to-cylinder deviation in spray and combustion and emission when pilot injection is applied at normal idling condition. It was concluded that the cylinder-to- cylinder deviation in spray behavior is not solely responsible for deviation in combustion and emission, but the in-cylinder condition is also responsible.