This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
More Data on ORI Variables
Annotation ability available
Sector:
Language:
English
Abstract
The effects of selected fuel additives, engine operating conditions, and driving modes on ORI have been investigated for the 1975 Ford 400 CID engine. A twenty-seven vehicle program was designed with three vehicles per variable. Reduced coolant temperatures significantly lowered ORI. Methanol appears to reduce ORI. Variables which do not produce strong trends are increased air-fuel ratio, a driving cycle with wide open throttle accelerations, a fuel with a carrier oil additive, and heavier fuels.
An inverse relationship between initial octane requirements and ORI was observed.
Recommended Content
Authors
Citation
Saillant, R., Pedrys, F., and Kidder, H., "More Data on ORI Variables," SAE Technical Paper 760196, 1976, https://doi.org/10.4271/760196.Also In
References
- MVMA National Fuel Survey Winter Season March 15 1975 Motor Gasolines Winter 1974-1975 Bartlesville Energy Research Center Bartlesville, Oklahoma
- Benson J. D. “Some Factors Which Affect Octane Requirement Increase” SAE Paper No. 750933 1975
- Alquist F. E. Holman G. E. Wimmer D. B. “Some Observations of Factors Affecting ORI” SAE Paper No. 750932 1975
- Niles H. T. McConnell R. J. Roberts M. A. Saillant R. B. “Establishment of ORI Characteristics as a Function of Selected Fuels and Engine Families” SAE Paper No. 750451 1975
- Influence of Leaded and Unleaded Fuels on Octane Requirement Increase in 1975 Model Cars, 20 Car Pilot Program at Southwest Research Institute” CRC Report No. 445 March 1971
- “1974 CRC Octane Number Requirement Survey” Coordinating Research Council, Inc. New York 1975
- Beaubier R. C. Gibson H. J. “The Effect of Atmospheric Pressure on the Octane Requirement of Engines” Ethyl Corporation June 1963
- “Project II - ORI” Amoco IIEC-2 Topical Meeting May 6-7 1975
- Most W. J. Longwell J. P. “Single Cylinder Engine Evaluation of Methanol Improved Energy Economy and Reduced NO x ” SAE Paper No. 760119 1975
- “Octane Requirement Increase in 1973 Model Cars, Phase II: 1973 CRC Road Rating Program” CRC Report No. 476 February 1975