| 单词 | research octane number |
| 释义 | > as lemmasresearch octane number research octane number n. Oil Industry an octane number as determined by the research method of the American Society for Testing and Materials, used chiefly for low engine speeds and loads; abbreviated RON.The method involves running a fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of isooctane and n-heptane. ΚΠ 1943 U.S. Patent 2,326,704 4/1 A coke still naphtha having an A.S.T.M. octane number of 59 and a research octane number of 63.1 was isoformed over a silica-alumina catalyst. 1973 K. Owen in G. D. Hobson Mod. Petroleum Technol. (ed. 4) xv. 591 The motor method was developed first... In the late 1930s it was found that new cars were rating gasoline nearer to the research method, and since 1949 research octane numbers have been used as the important parameter for defining octane quality. 2007 Appl. Thermal Engin. 27 2919/2 The research octane number of gasoline is 90. < as lemmas |
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