Of these, heptane with 7 carbons causes undesirable engine knocking, so refiners try to blend in more smooth-burning octane with 8 carbons.
7个碳的庚烷引起不明原因引擎抽风。炼油厂尝试混入更多的8个碳的辛烷。
With lead and MTBE additives now phased out, spiking petrol with a small amount of ethanol raises its octane level enough to prevent the engine from "knocking" under load.
目前铅和甲基叔丁基醚(MTBE)等添加剂被叫停，取而代之的是在汽油中添加少量酒精，这样提升辛烷水平能防止负载中引擎产生爆震。
The engine is knocking. There must be something wrong.
发动机发出震响，一定出什么故障了。
It causes a knocking or pinging sound, robs the engine of power and, left unchecked, causes serious engine damage. Knock may be eliminated with the appropriate octane number.
这导致侦测敲击或声音，剥夺了权力的发动机，同时，不加制止，造成严重的发动机损坏。爆震可能与相应的辛烷值淘汰。
The engine of our car is knocking badly.
我们汽车发动机的响声很大。
Their engine would start to misfire causing it to make knocking noises.
他们的引擎就开始发出撞击的噪音，但并不起火。
Finally, is knocking harmful? Occasional light knocking will not harm your engine.
最后，在敲门有害？偶尔敲门，这将不会伤害你光引擎。
Through analysis on the causes of mechanical cylinder-knocking and fuel-oil cylinder-knocking of the diesel engine, this paper puts forward corresponding treating methods respectively.
通过分析柴油机机械敲缸和燃油敲缸的原因，分别提出了在实际运用中相应的处理方法。
On the basis of thermodynamic analysis, a proposal for realizing non-knocking operation for turbocharged gasoline engine...
最后以热力学理论分析为依据提出了实现增压汽油机无爆燃运行的设想。
那引擎发出爆震声响。
发动机爆震得厉害。
发动机爆震得厉害。
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