对“97号”车用无铅汽油的质疑

Query on Unleaded Gasoline No. 97

车用汽油无铅化后 ,北京的加油站销售的 97号无铅汽油名实不符。国家标准中没有 97号无铅汽油 ,该牌号汽油应为国标中的 95号无铅汽油。这可能是在同时供应含铅、无铅各三个牌号的两类汽油时 ,无铅汽油沿用含铅汽油牌号称谓 ,把 95号无铅汽油对应叫成 97号含铅汽油。汽油牌号不同 ,辛烷值不同。辛烷值越高 ,抗爆指数越大 ,反映汽油抗爆燃的性能越好。汽油的辛烷值 ,是汽车选油的依据 。

Although the unleaded gasoline for motor vehicles has been put into use and distributed to the gas stations in Beijing, 'No. 97' unleaded gasoline does not accord with its properties. In fact, there is no No. 97 unleaded gasoline based on the state standards, and the so_called 'No. 97' unleaded gasoline is No. 95 unleaded gasoline based on the international standards. This probably results from the simultaneous supply of 3 leaded and unleaded brands of 2 categories, during which the names of leaded brands are extended to the unleaded ones, i.e., No. 95 unleaded gasoline is mistaken for No. 97 leaded gasoline. Different brands have different octane ratings.The higher the octane ratings.The higner the octane ratings,the better anti_knock properties. The misuse of gasoline will affect the functions of cars.