关于车用燃料添加剂方面的,麻烦各位帮忙翻译下面这几句 ...? Octane requirements were determined at the start of the experiment and once each day thereafter. The method consisted of introducing known octane number primary reference fuels into the carburetor at an air/fuel ratio of 13:1, and advancing the spark to produce trace audible knock at wide open throttle. Three reference fuels were used having octane numbers such that the spark advance of 60 BIDC could be bracketed. The octane requirement at 6 BTDC was then determined by interpolation from a curve relating octane requirement to spark advance.查看更多3个回答 . 2人已关注