What is a motorcycle spark plug?

The spark plug is an important component of the ignition system of a gasoline engine. It can introduce high-voltage electricity into the combustion chamber and cause it to skip the electrode gap to generate sparks, thereby igniting the combustible mixture in the Cylinder. It is mainly composed of a terminal nut, an insulator, a terminal screw, a center electrode, a side electrode and a shell, and the side electrode is welded on the shell.
The Moto Normal Spark Plug is composed of two parts: an insulator and a metal shell. The metal shell is threaded and screwed on the engine cylinder. There is a center electrode in the metal shell, which is insulated from the metal shell by insulating materials, and there is a center electrode on the upper end of the center electrode. The wiring nut is connected to the high-voltage line from the distributor. The ground electrode is welded under the metal shell. There is a small gap between the center electrode and the ground electrode. The pulse high-voltage electricity breaks down the air between the two electrodes. , Producing electric sparks to ignite the combustible mixture to do work. Because the Spark Plugs work in the harsh environment of high temperature and high pressure, their materials and manufacturing processes are very demanding. However, nickel alloy spark plugs are often used in most economic cars, and only mid-to-high-end cars can Use platinum spark plugs or Platinum Spark Plugs.

Types of spark plugs:
There are many types of spark plugs. In terms of materials, there are mainly nickel alloys, platinum, iridium, etc. These materials themselves have good electrical conductivity.
In terms of materials, there are mainly nickel alloys, platinum, iridium, etc. These materials themselves have good electrical conductivity. There are cold spark plugs and hot spark plugs in the form of spark plug heat dissipation. The electrode structure of spark plugs mainly includes unipolar, bipolar, tertiary and quadrupole.

Principle of spark plug:
Under the action of high voltage, the air between the center electrode and the side electrode of the spark plug will rapidly ionize, forming positively charged ions and negatively charged free electrons. When the voltage between the electrodes reaches a certain value, the number of ions and electrons in the gas increases like an avalanche, so that the air loses its insulation, and the gap forms a discharge channel, causing a "breakdown" phenomenon. At this time, the gas forms a luminous body, that is, a "spark". As it heats up and expands, there is also a "pop" sound. The temperature of this electric spark can be as high as 2000-3000 DEG C, which is enough to ignite the mixed gas in the combustion chamber of the cylinder.

Features of Motorcycle Spark Plugs:
In spark plug standards, the calorific value is usually used to characterize the thermal characteristics of the spark plug. The calorific value of the spark plug indicates the balance of heat absorption and heat dissipation of the insulator skirt of the spark plug. The higher the calorific value. The stronger the balance between heat absorption and heat dissipation, the hot spark plug has a lower calorific value, and the cold spark plug has a higher calorific value. Generally, engines with high power and large compression ratios use cold spark plugs with high calorific value; on the contrary, engines with low power and low compression ratios use hot spark plugs with low calorific value. Generally, the selection of spark plugs is determined by the factory through product finalization experiments, and should not be replaced at will.