| 摘要 |
PURPOSE: A cylinder head structure for a gasoline direct injection engine is provided with a spark plug which is coupled to a fixed position as first and second keys placed at an acute angle are assembled. CONSTITUTION: A cylinder head structure for a gasoline direct injection engine comprises a spark plug(130). The spark plug comprises first and second plugs(131,138). The first plug comprises an earth electrode(312) protruding from a cylinder head. The first plug is inserted into the hole of the cylinder head. The second plug comprises a center electrode(139) and threads. The center electrode protrudes toward the earth electrode. The second plug is thread joined with the inner surface of the hole, and connected to the first plug. The first plug is inserted into the hole along a predetermined path in a state where the guide key(133) of the first plug is inserted into a guide groove.
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