SPARK PLUG FOR INTERNAL COMBUSTION ENGINE, AND INTERNAL COMBUSTION ENGINE INCLUDING THE SAME

• Main Authors: SUGIURA AKIMITSU, KINOSHITA SHOTA
• Format: Patent
• Language: English; Japanese
• Published: 16.02.2023
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CORONA DEVICES; ELECTRICITY; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARK GAPS; SPARKING PLUGS; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; WEAPONS

To provide a spark plug for an internal combustion engine capable of improving the ignition, and an internal combustion engine including the same.SOLUTION: When a spark plug 1 is divided into two parts including a first plug part 11 including a fixed end part 61 and a second plug part 12 by a virtual plane P including a plug central axis C, at least one of plural injection holes is formed in the first plug part 11. At least one of first injection holes 511 is a gap side injection hole 512 in which a first extension area 511E overlaps with a discharge gap G, in a cross-sectional view including an injection hole axis 511L and along a plug axial direction. Also, in a direction perpendicular to both the plug axial direction and a longitudinal direction of a ground electrode 6, a width of the ground electrode 6 is larger than a width of a tip of a center electrode 4. Seen from the plug axial direction, the first extension area 511E of the gap side injection hole 512 passes through a gap extension area GE2 without passing through the discharge gap G.SELECTED DRAWING: Figure 5 【課題】着火性を向上させることができる内燃機関用のスパークプラグ及びこれを備えた内燃機関を提供すること。【解決手段】スパークプラグ１を、プラグ中心軸Ｃを含む仮想平面Ｐによって、固定端部６１を含む第一プラグ部１１と、第二プラグ部１２とに２分割したとき、複数の噴孔のうちの少なくとも一つは第一プラグ部１１に形成されている。第一噴孔５１１のうちの少なくとも一つは、第一延長領域５１１Ｅが、噴孔軸５１１Ｌを含むと共にプラグ軸方向に沿った断面視において、放電ギャップＧと重なる、ギャップ側噴孔５１２である。また、プラグ軸方向及び接地電極６の長手方向の双方と直交する方向において、接地電極６の幅は、中心電極４の先端部の幅よりも大きい。プラグ軸方向から見て、ギャップ側噴孔５１２の第一延長領域５１１Ｅは、放電ギャップＧを通過することなく、ギャップ延長領域ＧＥ２を通過する。【選択図】図５