Browse Publications Technical Papers 952521
1995-10-01

The Development of Driveability Index and the Effects of Gasoline Volatility on Engine Performance 952521

To reduce engine exhaust emissions, we have had to deal with this global environmental problem from the fuel side by introducing oxygenated fuels, reducing the RVP and using low aromatics. But when we change the fuel components and distillation, we must take note about how these affect the engine driveability.
We have used T50, T90, RVP and so on as the fuel index up to the present. It is possible to characterize the fuel from one aspect, but these indexes don't always represent the real feature of the fuel.
In this paper we propose a New Driveability Index (here in after referred to as NDI) that is more realistic and accurate than the other fuel indexes. We used a 1600cc DOHC L4 MPI type engine. We used Model Gasolines and Market Gasolines, see Appendix(1), (2) and (3), and tested them according to the Excess Air Ratio Response Test Method (here in after referred to as λ-R Test) that was suggested in SAE paper #930375, and we calculated the NDI statistically. This NDI is a function of the fuel distillation as shown later. We could express NDI as a linear function of the excess air ratio response test results.
NDI is suitable for using with not only hydrocarbon gasolines but also oxygenated gasolines such as those mixed with MTBE, ETBE and Ethanol. Furthermore, we tested two other engine types and confirmed that we could apply this NDI to them.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Effects of Driveability Index and MTBE on Driver Satisfaction at Intermediate Ambient Temperatures

932671

View Details

TECHNICAL PAPER

Effects of Mid-Level Ethanol Blends on Conventional Vehicle Emissions

2009-01-2723

View Details

TECHNICAL PAPER

The Development and Proposed Implementation of the ASTM Driveability Index for Motor Gasoline

881668

View Details

X