Annual surveys on Octane Number Requirement(ONR) of Japanese model passenger cars have been conducted, and the trend covering the period of 1982-1992 is described as a follow-up of the earlier report-SAE 830510. The ONRs showed a gradual decrease until 1990, but increased in later two years, reaching 91.2 and 95.3 ON at 50% and 90% car satisfaction levels, respectively, in 1992.The ONR at high speed range(80-120 km/hr) tended to increase and its differences from the low speed ONR(30-120 km/hr) have become gradually smaller for 1985-1992. Also, engine speed distribution at the maximum ONR values shifted to higher speed range above 2050rpm.Reflecting the recent increasing use of premium gasoline-spec cars, ONR distribution of these cars was separately measured, and resulted in 97.5 and 100.5 RON at 50% and 90% satisfaction levels respectively, in 1992 year model cars.This value is approximately 5 RON higher than regular gasoline spec cars at 90% satisfaction level.


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    Title :

    JPI Octane Number Requirement Survey 1982-1992 Japanese Model Passenger Cars


    Additional title:

    Sae Technical Papers


    Contributors:
    Kawaguchi, H. (author) / Tsukuda, I. (author) / Ogawa, K. (author) / Ishino, M. (author) / Kagami, M. (author) / Matsubara, M. (author) / Nagashima, M. (author) / Mori, T. (author)

    Conference:

    International Congress & Exposition ; 1994



    Publication date :

    1994-03-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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