Many car owners have this experience. When the engine speed is very high, there is a fuel cut-off. The small editor of the automatic transmission maintenance manufacturer will explain why you do this next? The manufacturer's design will not be aimless, so Xiaobian consulted the maintenance master of 4S store and now shares the results with the majority of car owners.

来看什么是发动机断油。发动机断油是指发动机在转速达到一定高度是，如8000转/分，行车电脑会自动停止对发动机供油，令发动机转速不能超过限值，这是厂家出于保护发动机的目的而特别设计的。

First, let's look at what is engine oil cut-off. Engine oil cut-off means that when the engine speed reaches a certain height, such as 8000 rpm, the trip computer will automatically stop supplying oil to the engine, so that the engine speed can not exceed the limit, which is specially designed by the manufacturer for the purpose of protecting the engine.

普通发动机设计转速通常不会超过8000转/分，但是竞技用发动机，如F1所用的发动机，通常换挡转速都会在18000转/分以上。然后怎么提前预知要出现发动机断油呢?其实在转速表上一般都用红区标示发动机的危险转速，当指针进入红区后，发动机一般都会停止燃油喷射。如果是自动挡车型，则会自动换挡以降低发动机转速。

The design speed of ordinary engine usually does not exceed 8000 rpm, but the shift speed of competitive engine, such as the engine used in F1, is usually more than 18000 rpm. Then how can we predict in advance that there will be an engine fuel cut-off? In fact, the red zone is generally used to indicate the dangerous speed of the engine on the tachometer. When the pointer enters the red zone, the engine will generally stop fuel injection. In the case of automatic models, it will shift automatically to reduce the engine speed.

所以，出现发动机断油的时候不要误以为是发动机出问题了。另外，为了自己的爱车着想，自动变速箱维修厂家小编建议不要使发动机转速提的太高。

Therefore, when the engine is out of oil, don't mistakenly think that there is something wrong with the engine. In addition, for the sake of your car, the small editor of the automatic transmission maintenance manufacturer recommends not to raise the engine speed too high.