发明授权
- 专利标题: Ignition device having an electrode with a platinum firing tip and method of construction
- 专利标题(中): 点火装置具有具有铂烧结尖端的电极和结构方法
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申请号: US11624272申请日: 2007-01-18
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公开(公告)号: US07923909B2公开(公告)日: 2011-04-12
- 发明人: Paul Tinwell
- 申请人: Paul Tinwell
- 申请人地址: US MI Southfiled
- 专利权人: Federal-Mogul World Wide, Inc.
- 当前专利权人: Federal-Mogul World Wide, Inc.
- 当前专利权人地址: US MI Southfiled
- 代理机构: Dickinson Wright, PLLC
- 代理商 Robert L. Stearns
- 主分类号: H01T13/20
- IPC分类号: H01T13/20
摘要:
An ignition device for an internal combustion engine and method of construction therefore includes a housing with an insulator secured therein. A center electrode is mounted within the insulator. A ground electrode extends from the housing with a portion of the ground electrode defining a spark gap across from the center electrode. At least a selected one of the center electrode or ground electrode has a platinum or platinum-based alloy firing tip. A resistance weld joint bonds the firing tip to the selected electrode and defines a lower surface of the firing tip that is embedded a first distance beneath an outer surface of the selected electrode. A continuous bead of overlapping laser weld pools is formed over an outer periphery of the firing tip. The overlapping weld pools extend a second distance beneath the outer surface of the selected electrode, with the second distance being greater than the first distance.
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