Accession Number:

ADA159127

Title:

1982 CRC Fuel Rating Program: Road Octane Performance of Oxygenates in 1982 Model Cars.

Descriptive Note:

Corporate Author:

COORDINATING RESEARCH COUNCIL INC ATLANTA GA

Personal Author(s):

Report Date:

1985-07-01

Pagination or Media Count:

205.0

Abstract:

Because of the widespread interest in the use of alcohols and ethers as gasoline blending components, the present program was conducted to evaluate the effects of several oxygenates on gasoline octane performance and to evaluate the effects of car design features such as engine and transmission type. Five oxygenates were evaluated at two nominal concentrations, 5 and 10 volume percent, at both regular- and premium-grade octane levels methanol MeOH, ethanol ETOH, isopropanol IPA, tertiary butanol TBA, and methyl tertiary butyl ether MTBE. A blend of 5 percent MeOH and 5 percent TBA was also tested at both octane levels. Twenty-eight unleaded fuels, including four hydrocarbon fuels, two hydrocarbon fuels plus toluene, and twenty-two oxygenated fuels, were rated in duplicate in thirty-eight cars using the Modified Uniontown Technique CRC Designation F-28-75 described in Appendix C, plus some additional instructions. All testing was done on chassis dynometers. Ratings were obtained at full throttle with all thirty-eight cars, and at the most critical part-throttle condition occurring with manifold vacuum of 4 in. Hg 13.5 kPa or greater above the full-throttle vacuum with nine cars.

Subject Categories:

  • Fuels
  • Reciprocating and Rotating Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE