Road Rating Trends of United States Motor Cars - A Review of Recent CRC Programs
730012
02/01/1973
- Event
- Content
- A review of the CRC road rating programs conducted between 1952 and 1971 indicates that:
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1.
Equations based on RON and MON are satisfactory for predicting the road octane numbers of gasolines.
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2.
MON has become more important and RON less important in prediction equations.
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3.
Variables such as percent aromatics, Pb concentration, and DON are not broadly significant and improve RON/MON equation predictions only in restricted applications.
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4.
Car appreciation of low-sensitivity fuels has increased, while appreciation of high-sensitivity fuels has decreased.
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5.
Road octane response to increase in laboratory octane quality has decreased.
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6.
Variability of Road octane testing and predictions have remained substantially constant over the past 20 years.
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7.
Because of variability considerations, measurements of road versus laboratory octane relationships and estimates of car satisfaction are subject to significant errors.
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1.
- Pages
- 20
- Citation
- Bailey, B., Forster, E., and Morris, W., "Road Rating Trends of United States Motor Cars - A Review of Recent CRC Programs," SAE Technical Paper 730012, 1973, https://doi.org/10.4271/730012.