Patent ID: 7827976
Filing Date: 2010-11-09
Classification: F02F,F02P,H01T

Abstract:
1. A tube unit of a spark plug for an engine that is used for mounting the spark plug in a cylinder head, comprising: a spark plug tube including a hollow tube body inserted in an interior mounting hole of the cylinder head, the hollow tube including a sealed lower end having a gasket for sealing against an upper end of a penetration hole formed at a lower deck, wherein the spark plug is slidably received in the spark plug tube and a lower end portion of the spark plug protrudes from the sealed lower end and engaged to the penetration hole; and a compression bolt engaging the interior mounting hole of the cylinder head at an upper end of the hollow tube body so as to apply compression force to the hollow tube body and generate surface pressure against the gasket to seal a gap disposed between the hollow tube body and the penetration hole while the compression bolt is engaged to the interior mounting hole of the cylinder head.