Multi-gap spark plugs

Abstract

The invention discloses a multi-gap spark plug comprising a metal shell and an insulated ceramic core arranged in the metal shell. The metal shell is connected with a side electrode which is arranged in the same direction with the axial direction of the metal shell. The insulated ceramic core is internally provided with a main electrode which is arranged in the same direction with the axial direction of the insulated ceramic core. A guide electrode is arranged between the main electrode and the side electrode. The guide electrode is transversely arranged on an upward protruding boss of the insulating ceramic core and two ends of the guide electrode are exposed outside the boss. The axial line of the guide electrode is perpendicular to the main electrode and the side electrode respectively. According to the multi-gap spark plug, the guide electrode is transversely arranged on the boss of the insulating ceramic core, the guide electrode is perpendicular to the main electrode and the side electrode respectively, excluding the end faces of two ends of the guide electrode, other parts of the guide electrode are arranged in the boss, the heating area of the other parts is smaller than that of the end faces of the two ends, the ablation degree of the guide electrode is greatly reduced, the use time of the guide electrode is prolonged, thus the service life of the spark plug is raised, and the use time reaches 40000 hours.

Description

technical field [0001] The invention relates to the technical field of spark plugs, in particular to a multi-gap spark plug. Background technique [0002] The existing spark plugs are equipped with one or more transition electrodes and one or more side electrodes for a main electrode. The main electrode (also called the center electrode), the transition electrode and the side electrodes are parallel to each other, and some transition electrodes and / or side electrodes are The upper end of the electrode extends toward the main electrode. For example, the Chinese utility model patent with the notification number CN2912018Y, the straight series high-energy spark plug includes a central electrode and a side electrode, and one or two linear transition electrodes are arranged between the center electrode and the side electrodes, and the transition electrodes are exposed on the The outer length of the ceramic body is reduced, thereby reducing the heating area and improving the serv...

AI Technical Summary

Problems solved by technology

However, both technical solutions use the method of bending or increasing the cross-section at the end of the electrode to reduce the flashover gap and improve the reliability of the spark plug. If the distance is too large, the air between the two electrodes of the spark plug cannot be broken down, and then the spark cannot be generated to ignite the mixed gas in the cylinder, and its service life is low

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