CRC octane number requirement survey for 1989

Technical Report · Wed Aug 01 04:00:00 EDT 1990

OSTI ID:6120928

An annual statistical survey of octane number requirements of current model vehicles is conducted by the Coordinating Research Council, Inc. Test data have been obtained by eighteen companies on 391 1989 vehicles including passenger cars and light-duty trucks and vans, of which 179 were equipped with knock sensors. Maximum octane number requirements were determined by testing at maximum-throttle conditions, as well as at part-throttle, with three unleaded fuel series of varying sensitivities. Requirements are expressed as the (R+M)/2 octane number, Research octane number, and Motor octane number of the reference fuel producing knock which was recurrent and repeatable at the lowest audible level. Estimated octane number requirements for the total vehicles are weighted in proportion to the 1989 vehicle model production and/or sales figures. The maximum octane number requirements of 1989 models with average sensitivity unleaded fuels were 85.1 (R+M)/2 octane numbers at the 50 percent satisfaction level, and 89.2 (R+M)/2 octane numbers at the 90 percent satisfaction level. Comparison with previous Surveys are made in this report.

• Research Organization: Coordinating Research Council, Inc., Atlanta, GA (USA)
• OSTI ID: 6120928
• Report Number(s): AD-A-226762/3/XAB; CRC--570
• Country of Publication: United States
• Language: English

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ANTIKNOCK RATINGS
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COMPARATIVE EVALUATIONS
DATA
FUELS
GASOLINE
INFORMATION
LIQUID FUELS
MATHEMATICS
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