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Gasoline Driveability Index, Ethanol Content and Cold-Start/Warm-Up Vehicle Performance
Technical Paper
2005-01-3864
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
During 2003 the Coordinating Research Council conducted an intermediate ambient temperature vehicle driveability research program. The objective of the program was to determine the effects of ethanol content on cold-start and warm-up driveability. Twenty-seven latest technology fuel injected vehicles, which included passenger cars, vans, and light duty trucks, were used to evaluate ten test fuels. A hydrocarbon-only base fuel was blended to have a nominal 1300 Driveability Index (DI). Three ethanol containing fuels were produced by splash blending 3, 6, and 10 volume percent ethanol into the base fuel. Three additional ethanol fuels containing 3, 6, and 10 volume percent ethanol were produced to nominally match the 1300 DI volatility characteristics of the hydrocarbon-only base fuel. Three hydrocarbon-only fuels were produced using the base fuel and light hydrocarbons to nominally match the volatility characteristics of the 3, 6, and 10 volume percent ethanol splash blended fuels. Cold-start and warm-up driveability tests were conducted in the ambient temperature range of -1°C - 4°C (30°F - 40°F). As DI increased over the range 1250 - 1300, cold-start and warm-up driveability became poorer. The program revealed that DI alone was not a good predictor of performance for both hydrocarbon-only and ethanol blended fuels. Driveability performance models were developed for a combination of hydrocarbon-only and ethanol blended gasolines. These findings will be useful in possible future investigations to define the impact of ethanol on Driveability Index of fuels with Driveability Indices less than 1250 as specified in ASTM D 4814, Standard Specification for Automotive Spark-Ignition Engine Fuel. Two models were developed based on DI, one including an ethanol content term and the other model with an ethanol term independent of concentration. Surprisingly, both equations provided similar predictive precision.
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Topic
Citation
Jewitt, C., Gibbs, L., and Evans, B., "Gasoline Driveability Index, Ethanol Content and Cold-Start/Warm-Up Vehicle Performance," SAE Technical Paper 2005-01-3864, 2005, https://doi.org/10.4271/2005-01-3864.Also In
References
- Eisinger, J. O. Barnard, D. P. “Effect of Gasoline Volatility Change on Automobile Road Performance,” Oil and Gas Journal 34 34 July 11 1935
- Moxey, J. G. “Engine Warmup with Present-Day Fuels and Engines,” SAE Quarterly Transactions 1 441 July 1947
- Moore, G. T. Young, R. D. Toulmin, H. “Effect of Fuel Volatility on Starting and Warm-up of New Automobiles,” SAE Paper 570056 SAE Transactions 65 692 1957
- “Driveability Evaluation in Cool Weather,” CRC Report No. 439 Coordinating Research Council Alpharetta, GA December 1970
- Benson, J. D. Bigley, H. A. Jr., Keller, J. L. “Passenger Car Driveability in Cool Weather,” SAE Paper 710138 January 1971
- 1984 CRC Intermediate Temperature Driveability Program Using Gasoline-Alcohol Blends CRC Report No. 554 Coordinating Research Council Alpharetta, GA August 1987
- 2000 CRC Intermediate-Temperature Volatility Program CRC Report No. 626 Coordinating Research Council Alpharetta, GA June 2001
- 2003 CRC Intermediate-Temperature Volatility Program CRC Report No. 638 Coordinating Research Council Alpharetta, GA February 2004
- Barker, D. A. Gibbs, L. M. Steinke, E. D. “The Development and Proposed Implementation of the ASTM Driveability Index for Motor Gasolines,” SAE Paper 881668 October 1988
- 2002 CRC Driveability Workshop CRC Report No. 631 Coordinating Research Council Alpharetta, GA November 2002
- Thornton, Matthew Jorgensen, Scott Evans, Beth Wright, Ken “Cold-Start and Warm-up Driveability Performance of Hybrid Electric Vehicles Using Oxygenated Fuels” SAE Paper 2003-01-3196 October 2003
- 2002 CRC Driveability Workshop CRC Report No. 631 Coordinating Research Council Alpharetta, GA November 2002
- Shoffner, B. “A Vehicle Fuel Tank Flush Effectiveness Evaluation Program,” SwRI Project 08-31008 Southwest Research Institute August 20 2001