Without operational spark plugs, your engine won’t run. If even just one plug were to fail, the change in functionality would be very noticeable. Your engine would run rough, it would idle poorly, it might spit and sputter during acceleration, and it might even stall out on you. Spark plugs do wear out over time, although the actual lifespan varies depending on the type of plug in question, the condition of your engine, and your driving habits.
火花塞的磨损因素
There are several factors that play a role in spark plug health, but the most common reason for them to wear out is that they’re just old. To understand this, you need to know a bit more about how spark plugs work.
当交流发电机生成电力时，它将通过点火系统，沿火花塞线以及每个单独的火花塞发送。然后，插头在电极处创建电弧（从插头底部突出的小金属缸）。每次插头发射时，都会从电极上取出一定量的金属。这会缩短电极，并且需要越来越多的电力来创建发射气缸所需的弧线。最终，电极会磨损，以至于根本不会弧形。
This is what happens in a normal, properly maintained engine. There are other factors that can reduce plug life (all spark plugs eventually wear out; it’s just a question of when).
过热的伤害: Overheating spark plugs can cause the electrode to wear faster. Pre-ignition from an improperly timed engine can cause this, as can an incorrect air to fuel ratio.
石油污染：如果石油渗入火花塞，它将犯规。这会造成损坏和额外的磨损（在密封开始失败时，渗入燃烧室的油会随着时间的流逝而发生）。
Carbon：尖端上的碳堆积也可能导致过早失败。这可能是由于脏喷油器，堵塞的空气过滤器以及许多其他原因而发生的。
As you can see, there are a number of different factors that affect when your spark plugs will fail, and just how much use you’ll get out of them.
