Spark plug and its method of production

A technology for ignition plugs and manufacturing methods, which is applied in the field of ignition plugs, can solve problems such as complex processing and complex mold production processes, and achieve the effects of easy production and molding, easy production, and high service life
CN102394474AInactive Publication Date: 2012-03-28BORGWARNER BERU SYST
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BORGWARNER BERU SYST
Publication Date
2012-03-28
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention describes a spark plug, which comprises an inner conductor, an insulator enclosing the inner conductor, a spark plug body enclosing the insulator and two electrodes forming a spark gap. The first electrode is a center electrode connected to the inner conductor in an electrically conductive manner and the second electrode is a ground electrode connected to the spark plug body in an electrically conductive manner. At least one of the electrodes has a precious metal region, adjoining the spark gap and consisting predominantly of platinum, iridium or an alloy of both and containing additionally at least one brittle metal. The precious metal region consists of a base material predominantly containing platinum and / or iridium, which comprises a coating with a brittle metal, which is more brittle than the base material.
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Description

technical field

[0001] The invention relates to a spark plug, which comprises an inner conductor, an insulating sheath covering the inner conductor, a glow plug body wrapping the insulating sheath, and first and second electrodes for forming an ignition gap, wherein the first The electrode is a central electrode, which is electrically connected to the inner conductor; the second electrode is a ground electrode, which is electrically connected to the glow plug body, and at least one of the first and second electrodes is provided with a noble metal region, and the noble metal The region is immediately adjacent to the ignition gap and consists essentially of platinum, iridium, or an alloy of the two, and additionally includes at least one brittle metal. Background technique

[0002] A glow plug of the type described above is known from patent document EP 2 012 397 A2. In known glow plugs of this type, the noble metal region is formed by a molded part. The molded part is welde...

Claims

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