This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Analyzing the Influence of Gasoline Characteristics on Transient Engine Performance
Annotation ability available
Sector:
Language:
English
Abstract
It has been reported that the middle range of gasoline distillation temperatures strongly affects vehicle driveability and exhaust hydrocarbon (HC) emissions, and that MTBE(CH3-O-C4H9)- blended gasoline causes poor driveability during warm-up. The present paper is concerned with the results of subsequent detailed research on gasoline characteristics, exhaust emissions and driveability.
In this paper, first it is demonstrated by using four models of passenger cars having different types of exhaust gas treatment system that decreased 50% distillation temperature (T50) reduces exhaust HC emission. This result indicates lowering T50 in the market will contribute to improving air quality.
Secondly gasoline behavior in the intake manifold is investigated by using an engine on the dynamometer in order to clarify the mechanisms of HC emission increase and poor engine response which are caused by high T50. It is found that high T50 cause poor gasoline vaporization and increased remaining liquid gasoline in the intake manifold, and this results in increased HC emission and poor engine response.
MTBE-blended gasoline deteriorate driveability by combination of following relations; MTBE content in the mixture of warm-up engines increases more than that of original MTBE-blended gasoline. MTBE has low calorific value. MTBE-blend causes lean mixture because of oxygen containing.
Recommended Content
Technical Paper | An Overview of Unocal's Low Emission Gasoline Research Program |
Technical Paper | The Effect of Gasoline RVP on Exhaust Emissions from Current European Vehicles |
Technical Paper | Effect of Gasoline Composition on Exhaust Hydrocarbon |
Authors
Citation
Kanehara, K., Sasajima, N., Nakada, M., Kayanuma, N. et al., "Analyzing the Influence of Gasoline Characteristics on Transient Engine Performance," SAE Technical Paper 912392, 1991, https://doi.org/10.4271/912392.Also In
References
- Hoshi H. et al “Effects of Gasoline Composition on Exhaust Emissions and Driveability” SAE paper 902094 1990
- Tornita Minoru et al “Effects of Gasoline Quality on Throttle Response of Engines During Warm-Up” SAE paper 900163 1990
- Gething Jeff A. “Distillation Adjustment: An Innovation Step to Gasoline Reformulation” SAE paper 910382 1991