Spark plug

Abstract

An improved spark plug (1) is disclosed, which comprises a plurality of spiral protrusions (7) which are protruded from an inner side of the calcular part in the direction of the center circular hole (5) so as to form a turbulent flow in the mixed gas when the gas compressed during a compression stroke is inputted into the spark forming space through the center circular hole (5) in a conventional spark plug which includes an axial core electrode (2) for a discharge spark, and a side surface ground electrode (4) which is opposite to the axial core electrode (2) with respect to a spark forming space with a circular part (6) having a center circular hole (5) being formed at a discharge end of the side surface round electrode.

Description

technical field [0001] [01] The present invention relates to a spark plug, in particular, to an improved spark plug which can remarkably improve spark diffusion efficiency and combustion efficiency when used in an engine. Background technique [0002] [02] In general, as shown in FIG. 3, the side ground electrode 12 of the spark plug 11 is bent in an L-shape, as if perpendicular to the axis direction, so that the discharge cross-sectional portion 14 linearly facing the axis electrode 13 is formed as rectangle. [0003] [03] When a spark discharge occurs in the spark plug, a spark occurs between the shaft core electrode 13 and the discharge end portion 14 of the ground electrode 12 provided below the shaft core electrode 13 . The mixed gas in the space 15 formed by the electrodes is combusted by the spark to explode the compressed mixed gas in the cylinder. In the conventional technology, the high-pressure air generated by the explosion may be blocked by the discharge end 1...

AI Technical Summary

Problems solved by technology

In addition, the side ground electrode 25 is designed to efficiently diffuse heat energy generated during spark and explosive combustion from the circular discharge end 23, so the area where sparks are generated may be enlarged

[0007] [07] However, known spark plugs with a rounded discharge tip 23 only slightly prevent the problem of carbon buildup on the electrode surface

In addition, if the compressed gas mixture in the spark space 22 between the electrodes 21 and 25 is not evenly distributed, the spark spread rate and combustion efficiency will be significantly reduced

The reason for the above problem is that the spark generated by the spark plug does not affect the evenly distributed mixed gas

The protrusion 28 formed inside the circular discharge tip 23 is formed in a simple structure, so the accumulated carbon cannot be effectively removed from the electrode surface because the spark spreads in a straight line shape

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