The effect of improved fuel quality on diesel engine exhaust emissions

Abstract

Six base fuels with differences in T90 and cetane number of 52-58 were split into fifteen batches. To nine of these batches, varying quantities of cetane improvers were added, resulting in cetane numbers up to 62. The base fuels and blends were tested in a ISUZU model 4JA1 diesel engine, and the exhaust emissions (NOx' HC, CO, benzene, toluene, xylene) were measured. The results showed that the emissions are dependent on engine parameters and fuel properties. NOX progressively increased with increasing load while HC, CO and BTX decreased. All emissions were little reduced as cetane number increased with additional cetane improver. The effect of EHN and DTBP on emissions were not different.