Sparking plug

Abstract

The invention discloses a sparking plug which comprises an insulator, a central electrode, a shell, a diversion plug-in and a grounding electrode. The insulator has a shaft hole extending in the axis direction. The central electrode is inserted in the shaft hole which penetrates through the insulator, and is exposed out of the end part. The shell is a hollow cylinder coated on the surface of the insulator. The diversion plug-in is a cylinder body; a flaming hole penetrating through the front and back end surfaces of the diversion plug-in is formed in the center of the diversion plug-in; the diversion plug-in is fixed in the shell; the front end of the diversion plug-in is aligned to the central electrode, the back end is positioned at the opening end of the shell, and the outer wall is bonded with the inner wall of the shell. The grounding electrode is arranged on the inner wall of the shell, or is arranged on the periphery of the flaming hole at the front end of the diversion plug-in; an ignition end part having a spark discharge gap is formed between the grounding electrode and the end of the central electrode. Compared with the prior art, the sparking plug avoids the generation of precipitates and the caused corrosion condition, so that the service life is prolonged. The structure of the diversion plug-in can improve the ignition efficiency and reflowing efficiency of the sparking plug so as to improve the combustion efficiency of an internal combustion engine.

Description

technical field [0001] The invention relates to the ignition field of an internal combustion engine, in particular to a spark plug. Background technique [0002] The internal combustion engine mixes liquid or gaseous fuel with air, and directly inputs it into the high-pressure combustion chamber inside the cylinder to generate power. It is a heat engine that converts thermal energy into mechanical energy. The spark plug is installed on the internal combustion engine to ignite the mixed gas in the combustion chamber. see figure 1 , which is a schematic structural view of the spark plug 13 in the prior art. The spark plug 13 includes a center electrode 132 , an insulator 134 , a shell 136 and a ground electrode 138 . The insulator 134 is a ceramic insulator with an axial hole extending along the axis, and the center electrode 132 is inserted through the axial hole of the insulator 134 . The casing 136 is disposed on the outer periphery of the insulator 134 , and the surfa...

AI Technical Summary

Problems solved by technology

However, setting the center electrode and the ground electrode in the cavity of the housing will increase the distance for the sparks generated by the two electrodes to enter the combustion chamber, thereby delaying the ignition time of the mixed gas in the combustion chamber. If the time of the stroke and the expansion stroke is fixed, the combustion time of the mixed gas will be shortened, which will reduce the combustion efficiency of the internal combustion engine to a certain extent, which is not conducive to energy saving and environmental protection.

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