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Effect of Volatility on Intermediate-Temperature Driveability with Hydrocarbon-Only and Oxygenated Gasolines
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Abstract
A cooperative cold-start and warmup driveability program was conducted by the Coordinating Research Council (CRC) in Yakima, Washington, during the fall of 1989. The program investigated the independent effects of front-end and mid-range volatility on cold-start and warmup driveability of twenty-four late model vehicles at intermediate ambient temperatures (30°F - 56°F). Volatility ranges investigated were those that may be required of future summertime fuels. Mid-range volatility (T50) was found to have a substantially significant impact on driveability, regardless of fuel-system type, while front-end volatility (RVP) was found to show a lesser but still significant effect on carbureted and throttle-body-injected vehicles. Oxygenate content/type was also a significant variable.
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Graham, J., Evans, B., Reuter, R., and Steury, J., "Effect of Volatility on Intermediate-Temperature Driveability with Hydrocarbon-Only and Oxygenated Gasolines," SAE Technical Paper 912432, 1991, https://doi.org/10.4271/912432.Also In
References
- “CRC Volatility Program on the Effect of Oxygenated Fuels and Altitude on Cold-Start Driveability at Low Ambient Temperatures,” CRC Report No. 569 Coordinating Research Council, Inc. Atlanta, Georgia January 1990
- “1990 CRC Driveability Workshop,” CRC Report No. 577 Coordinating Research Council, Inc. Atlanta, Georgia September 1991
- Barker D. A. Gibbs L. M. Steinke E. D. “The Development and Proposed Implementation of the ASTM Driveability Index for Motor Gasoline,” SAE Paper No. 881668 SAE International Fuels and Lubricants Meeting and Exposition Portland, Oregon October 10 13 1988