公开(公告)号：JP2014116181A

公开(公告)日：2014-06-26

申请号：JP2012269105

申请日：2012-12-10

Applicant: Nippon Soken Inc ,  株式会社日本自動車部品総合研究所 ,  Denso Corp ,  株式会社デンソー

Inventor： AOCHI TAKANOBU ,  INOHARA TAKAYUKI ,  OKABE SHINICHI ,  SHIBATA MASAMICHI ,  DOI KAORI

IPC: H01T13/20 ,  H01T13/32

CPC classification number: H01T13/32 ,  H01T1/20 ,  H01T13/02 ,  H01T13/20

Abstract: PROBLEM TO BE SOLVED: To provide a spark plug for internal combustion engine of simple configuration which can ensure stable ignitability regardless of the mounting position with respect to an internal combustion engine.SOLUTION: A spark plug 1 for internal combustion engine has a housing 2, an insulator 3, a central electrode 4, a ground electrode 5 and a tip protrusion 22. The tip protrusion 22 has an air guide face 221. When viewed from the axial direction of a plug, following relations are satisfied entirely; b≥-67.8×(a/D)+27.4, b≤-123.7×(a/D)+64.5, -0.4≤(a/D)≤0.4, 0°

Abstract translation: 要解决的问题：提供一种简单结构的内燃机用火花塞，其能够确保与内燃机的安装位置无关的稳定的点火性。解决方案：内燃机的火花塞1具有壳体2， 绝缘体3，中心电极4，接地电极5和尖端突起22.尖端突起22具有导气面221.当从插头的轴向观察时，完全满足以下关系： b≥-67.8×（a / D）+27.4，b≤-123.7×（a / D）+64.5,0.4≤（a / D）≤0.4,0°