While the effect of engine speed on the required inlet air temperature for autoignition is different for different octaneNumbers.
而发动机转速对自燃所需进气温度的影响则随所用燃料辛烷值的大小而异。
2
It is used for adjust to match the gasoline, raise the gasoline octane value, thus produce the No. 90, 93 Numbers and high mark number unleaded gasoline.