What is the reason why the spark plug stops burning?

What is the reason why the spark plug stops burning?

As a component that is frequently replaced in automobiles, spark plugs are replaced for many reasons. It is inevitable that individual spark plugs will not trip when the vehicle engine is working, and it is difficult for ordinary drivers to find out that their power loss is often compensated by increasing the throttle opening.

There are several main reasons why the spark plug does not flash:

First of all, the spark plug gap is not properly adjusted. If the gap is too small, the contact area between the spark and the mixture will be limited, and the growth of the flame core will be inhibited due to the "flame suppression" effect of the electrode. Although the fire has jumped away, the spark is weak and the mixture is difficult to ignite. If the gap is too large, the ignition voltage provided by the ignition system may not be enough to make the spark plug electrode flash.

There is also an oil film on the surface of spark plug electrode, which is caused by improper control of lubricating oil or gasoline. In fact, whether gasoline, engine oil or water accumulates on the spark plug, it will cause short circuit of the electrode. If the skirt of the spark plug cracks and carbon is deposited on the electrode, it will also cause short circuit and no flashover.

In other cases, if the electrode is damaged, it will also cause the electrode to break and fall off, which will not cause a fire. If the insulation resistance of the spark plug is too low, it will even lose its ignition function completely. There is also damage to the ignition ring and ablation of platinum contacts, which will cause the spark plug not to flash and the engine to fail to start.

Spark plugs must be maintained and overhauled regularly. If any abnormality is found, it should be repaired in time. If necessary, it should be overhauled, adjusted or replaced according to the specifications.