As the saying goes, the engine is the heart of the car, the spark plug is the heart of the engine, and the spark plug is an important part of the final ignition of the engine ignition system. The insulator is made of new high-alumina ceramics, the insulator and the main metal are connected by special powder, and the electrode is made of nickel alloy. 1.5-2.0.
It has excellent durability, and the surface color of a normal spark plug should be yellowish brown, and there should be no sintering residue on the surface. To check the spark plug, you can use a caliper to roughly measure the gap at low temperature, and then connect it outside, from the spark plug to the cylinder, connect the center electrode to the high-voltage line and turn it on, and observe the ignition switch. The spark should be in the middle of the electrode.
It means that the spark plug can be used normally. Under normal circumstances, if it is a new car, or a car that has been maintained normally within three years. The possibility of engine oil leaking into the combustion chamber is very low, and there will be no situation where the spark plug has an incorrect calorific value. The cars produced today all use electronic fuel injection systems, and the computer automatically detects the mixer for dosing.
There will not be a situation where the mixture is too rich. If your car uses the original spark plugs and has not been replaced before, it is usually because the spark plugs are close to their service life. First check whether the high-voltage package and ignition coil are defective, and then confirm the ignition performance. Spark plugs The problem, is it because of the ignition performance of the spark plug?
The combustion gas produced is too thick. If the head of the spark plug turns black when the mileage is short, it means that the mixture is too thick or the combustion is not sufficient. We can easily remove the black dust by touching the blackened part with our hands , there are many possibilities for this situation including poor fuel quality.
Poor atomization due to clogged fuel injectors or other faults, bad spark plugs themselves, bad ignition coils or cylinder line problems, weak spark plug and cylinder flash, too low pressure, of course these are relatively common problems, there are many others Faults can also lead to insufficient combustion and blackened spark plugs.
It is necessary to diagnose step by step according to the complete failure phenomenon of each model and eliminate the improper selection of spark plug heating power. The ignition is too weak, which is also one of the reasons for the blackening of the spark plug. The heating power of different types of spark plugs has obvious differences. If the spark plug is too low, gasoline will not burn sufficiently. Phenomenon, resulting in increased fuel consumption, lack of power.
If it is too high, it will not work, the heat generated will exceed the charging mark, and the spark plug will naturally turn black. The solution is to choose a spark plug with a suitable heating power according to the daily use of the car owner, which is determined by the structure of the spark plug itself.
The high voltage generated by the ignition device is applied between the center electrode and the ground electrode of the spark plug. The insulation state between the electrodes is destroyed to generate current, and the discharge generates electric sparks. The gap between the electrodes and the insulator is relatively small, and it will burn black after a long time , judging from this situation, is normal, just like we roast things with fire.
After a certain number of kilometers, the spark plugs will wear out. If it's not replaced regularly it can fail, in severe cases it can flake off metal, flow into the cylinder and damage the engine, but take care of the key pair of various standards, if the torque is too much it's misfiring can happen Variety.
Thus affecting the performance of this engine, in fact, some people often use fire to clean it, carbon deposits and oil stains on the electrode and skirt of the spark plug, this seemingly effective method is actually very harmful, because when it burns, the temperature It is difficult to control, the insulation is easy to burn out, causing the spark plug to lose power, and the small cracks produced after burning out are often difficult to find,
It brings a lot of trouble to troubleshooting. The correct way to deal with it is to use special equipment to clean it, which will have a good effect; the second is to clean it with a solution, soak the spark plug in alcohol or gasoline for a certain period of time, and wait for the carbon deposit to soften. Dry with a brush.
