Iridium spark plugs have the ignition efficiency of microscopic electrodes

Ignition performance of microscopic electrodes

Reasons to improve acceleration and fuel economy. Ignition efficiency of microscopic electrodes.

"Easy to form sparks" + "easy to grow flame nuclei" = ignition performance

Extinguishing operation has a great influence on ignition performance

At this stage, due to the extinguishing operation of the central electrode and the ground electrode, there is a danger that the fire core will be extinguished and the ignition will fail. Minimizing this extinguishing action and making the fire core grow as fast and largest as possible is the key to improving ignition performance.

Quentin activity of the electrodes.

The operation of electrodes, at low temperatures, in absorbing energy for the development of the flame core immediately after the spark is formed is called extinguishing action.

Why are the ignition characteristics of Iridium IX plug spark plugs so good?

The central electrode is small in diameter and the earth electrode head is cut to create a tapered shape, and this is what produces excellent ignition properties.

The quenching (cooling) operation of the electrodes is very small.

Iridium IX		Since the tip of the electrode has been given a small surface area, the Iridium IX plug has a small cooling (cooling) effect and the flame can grow wide.
	The electrodes have a small surface area and a small amount of absorbed heat.

Nickel		When the plug electrode temperature is low (when starting the engine, when idling, at low speeds, etc.), if the area (volume) of the electrodes is large, since being in a Nickel-type plug, energy is absorbed due to the low electrode temperature and the development of the flame is hindered.
	Heat is absorbed by both the central electrode and the earth electrode

Iridium IX		On Iridium IX spark plugs, the tip of the electrode forms an acute angle, so there is little dispersion at the site where the discharge occurred, and the discharge is concentrated at the end. This means that the flame grows quickly unhindered and the ignition performance is improved.
	The discharge occurs at the end of the electrode so there is little dispersion.

Nickel			In the case of Nikel spark plugs, the discharge site may be scattered. For example, if the discharge takes place in position (1) as indicated in the photo on the left, the ground electrode hinders the growth of the flame, and the combustion process becomes unstable.
		The discharge occurs at a location where the flame is difficult to grow.