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Knock Perception- A 1975 Customer/ Rater Study by CRC
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English
Abstract
Octane requirements of late model vehicles were determined by trained knock raters and compared with those determined by customers.
Average differences of independent distributions of customer and rater requirements were about 3 Research Octane Numbers/2 Motor Octane Numbers at part-throttle and 6 RON/4 MON at full-throttle and maximum octane requirement conditions.
Five percent of the customers objected to knock when their cars were operated on fuel matching rater requirements, while 50 percent objected when using fuel 6 RON/4 MON lower.
Another program is planned because differences between rater and customer octane requirements were greater than expected.
Authors
Citation
Bettoney, W., Rogers, J., Benson, J., Keller, B. et al., "Knock Perception- A 1975 Customer/ Rater Study by CRC," SAE Technical Paper 780321, 1978, https://doi.org/10.4271/780321.Also In
References
- Research Technique for Determination of Octane Number Requirement of Passenger Cars Appendix C, 1975 CRC Octane Number Requirement Survey August 1976 CRC Report No. 488 Coordinating Research Council, Inc. New York, N.Y.
- Letter to Russell E. Train, Administrator, Environmental Protection Agency, from Donald C. O'Hara, President, National petroleum Refiners Association December 13 1974
- Letter to M. K. McLeod, General Manager, Coordinating Research Council, Inc., from H. L. Misch, Ford Motor Company November 12 1974
- Letter to D. P. Barnard, 5th, The Standard Oil Company (Ohio), from J. D. Benson, General Motors Corporation February 14 1975
- 1975 CRC Customer/Rater Knock Perception Study 492 July 1977 Coordinating Research Council, Inc. New York, N.Y.
- Gumbel E. J. Statistics of Extremes Columbia University Press 1959
- Brownlee K. A. “Statistical Theory and Method-ology in Science and Engineering” John Wiley and Sons, Inc. 1960
- U.S. Department of Commerce, National Climatic Center, Federal Building, Asheville, N. C. 28801 Local Climatological Data November 1975 March 1976
- 1975 CRC Octane Number Requirement Survey August 1976 CRC Report No. 488 Coordinating Research Council, Inc. New York, N.Y.