IGNITION PLUG ATTACHING STRUCTURE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To solve such a problem that iron current is not easily detected by a relative position to intake ports in outside electric poles of an ignition plug. SOLUTION: The ignition plug 1 is attached in such a way that all outside electric poles 1b are disposed in regions of intake port opening part sides and/or exhaust port opening part sides in a region limited with opening parts of the ignition plug 1 and the intake ports 2 and opening parts of the ignition plug 1 and exhaust ports 3, or it is avoided that one outside electric pole 1b is positioned on an position where is opposed sandwiching a center electric pole 1a of the ignition plug 1 between the other outside electric pole 1b, in the case where the other outside electric pole 1b is positioned outside the limited region.