发明名称 |
Spark plug for internal combustion engine |
摘要 |
<p>A spark plug (1) for an internal combustion engine includes: a cylindrical insulator (2) having an axial hole (4) penetrating in a direction of an axis (C1); a center electrode (5) partially inserted in the axial hole (4); a metal shell (3) surrounding an outer periphery of the insulator (2) and which is fixed to the insulator (2) by means of a crimped portion (20) provided at a rear end portion of the metal shell (3); and a ground electrode (27) joined to the metal shell (3) such that a portion of the ground electrode (27) opposes a leading end portion of the center electrode (5) via a spark discharge gap (33), wherein the insulator (2) has an annular groove portion (23) which opposes an inner edge of the crimped portion (20).</p> |
申请公布号 |
EP1976078(A1) |
申请公布日期 |
2008.10.01 |
申请号 |
EP20080006006 |
申请日期 |
2008.03.28 |
申请人 |
NGK SPARK PLUG COMPANY LIMITED |
发明人 |
MORIBE, MAI;SUZUKI, AKIRA |
分类号 |
H01T13/36 |
主分类号 |
H01T13/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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