IGNITOR FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To prevent breakage of a housing by vibration of an internal combustion engine in an ignitor for the internal combustion engine storing and integrating an ignition plug and an ignition coil in one housing. SOLUTION: A non-screw part 12 is provided in a mounting hole 201 of a cylinder head 200 and on an anti-combustion chamber side more than a male screw part 11 among outer peripheral faces of the housing 1 and is brought into contact with an inner peripheral face of the mounting hole 201. Since an end part on the anti-combustion chamber side in the non-screw part 12 becomes a boundary part between a fixing part and a non-fixing part, outside diameter of the boundary part is enlarged and wall thickness of the housing in the boundary part is increased more than that of a conventional housing to improve strength of the boundary part. COPYRIGHT: (C)2006,JPO&NCIPI