1991-11-01

Development of a Multipurpose Utility D.I. Diesel Engine for Low Emissions 911260

The development of combustion system of a multipurpose utility single cylinder d.i. diesel engine for low emissions is discussed.Engine tests, using two shallow re-entrant combustion bowls, four nozzles with reduction sac volume and different holes diameter and spray angle, have been carried out.Shallow re-entrant bowls with high compression ratio give low smoke emissions. Nozzles with reduced sac volume decrease the hydrocarbon emissions while NOx emissions can be limited operating at more retarded start of combustion.

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