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目前,在我省的机动车加油站,供应有90号、93号、97号三种标号的无铅汽油。您在给机动车加油时,选择哪种标号的汽油最适合呢?为了说清这个问题,首先要了解汽油标号的含义:汽油标号,指的是此标号汽油辛烷值的大小,如:93号汽油,它的含义辛烷值也是93,而辛烷值又表示此标号汽油的抗爆性,汽油的标号越高,燃烧时发动机的抗爆性越好。为什么机动车使用的汽油要有抗爆性呢?因为要使发动机产生动力,必须要对进入发动机的空气进行压缩,只有被压缩的空气喷油点火后,空气才能膨胀,推动活塞做功。显然气体被压缩的程度越大,其压缩比(气体被压
At present, in our province’s motor vehicle gas station, supply 90, 93, 97 three kinds of unleaded petrol. In order to clarify this issue, we must first understand the meaning of the gasoline label: gasoline label, refers to the size of the octane number of the label, such as: 93 No. Gasoline, which means that the octane number is 93, while the octane number indicates that the antiknock gasoline, the higher the label of gasoline, the better the antiknock of the engine when burning. Why the use of motor vehicles have antiknock it? Because to make the engine to produce power, the engine must be compressed into the air, only the compressed air injection ignition, the air can be expanded to promote the work of the piston. Obviously the more the gas is compressed, the compression ratio (the gas is compressed