The invention provides an unleaded gasoline composition comprising a major amount of hydrocarbons boiling in the range from 30° C. to 230° C. and 2% to 20% by volume, based on the gasoline composition, of diisobutylene, the gasoline composition having Research Octane Number (RON) in the range 91 to 101, Motor Octane Number (MON) in the range 81.3 to 93, and relationship between RON and MON such that
(a) when 101≧RON>98, (57.65+0.35 RON)≧MON>(3.2 RON−230.2), and
(b) when 98≧RON≧91, (57.65+0.35 RON)≧MON≧(0.3 RON+54),
with the proviso that the gasoline composition does not contain a MON-boosting aromatic amine optionally substituted by one or more halogen atoms and/or C
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hydrocarbyl groups; a process for the preparation of such a gasoline composition; and a method of operating an automobile powered by a spark-ignition engine equipped with a knock sensor, with improved power output.
本发明提供了一种无
铅汽油组合物,该组合物包含主要量的沸点在30℃至230℃范围内的碳氢化合物和以汽油组合物为基准的2%至20%(体积)的二
异丁烯,该汽油组合物的研究
辛烷值(RON)在91至101范围内,发动机
辛烷值(MON)在81.3至93范围内,RON和MON之间的关系为
(a) 当 101≧RON>98 时,(57.65+0.35 RON)≧MON>(3.2 RON-230.2),以及
(b) 当 98≧RON≧91 时,(57.65+0.35 RON)≧MON≧(0.3 RON+54)、
但汽油组合物不含可被一个或多个卤素原子和/或 C
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烃基取代的芳香胺;一种制备这种汽油组合物的工艺;以及一种操作由装有爆震传感器的火花点火发动机驱动的汽车的方法,该方法可提高动力输出。