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Anti-fouling spark plug and method of making

A technology of spark plugs and coatings, which is applied in the manufacture of spark plugs, spark plugs, liquid chemical plating, etc., and can solve problems such as unqualified durability, reduction, and insufficient accumulation of combustion deposits

Inactive Publication Date: 2013-08-28
FLAMING GRP INTELLECTUAL PROPERTY LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These coatings do not adequately solve the problem - have unacceptable performance at high temperatures, unacceptable durability, or insufficient reduction in burn deposit build-up

Method used

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  • Anti-fouling spark plug and method of making
  • Anti-fouling spark plug and method of making

Examples

Experimental program
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Embodiment Construction

[0011] As described herein, the metal oxide-containing coating is a substantially continuous coating. As defined herein, a substantially continuous coating describes a coating having no cracks or indentations visible to the naked eye and the shaped tip portion of the covering portion, the outer surface of the insulating sleeve. The coating thickness may be 1 to 20 microns thick, or more specifically 5 to 15 microns thick.

[0012] Suitable metal oxides include barium oxide, copper(II) oxide, manganese oxide, vanadium pentoxide, zinc oxide, zirconium oxide, ceria, molybdenum trioxide, bismuth oxide, tungsten oxide, chromium trioxide, iron oxide ( III), cobalt oxide, nickel (II) oxide, titanium dioxide (anatase), tin oxide, and combinations of two or more of the foregoing metal oxides. Exemplary combinations of metal oxides include ceria and vanadium oxide, vanadium oxide and zirconia, and copper(II) oxide and vanadium oxide.

[0013] It has surprisingly been found that the me...

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Abstract

Disclosed herein is a spark plug comprising an insulative sleeve having a central axial bore and an exterior surface and a center electrode extending through the central axial bore of the insulative sleeve. The insulating sleeve is positioned within, and secured to, a metal shell that serves as a mounting platform and interface to an internal combustion engine. The metal sleeve also supports a ground electrode that is positioned in a spaced relationship relative to the center electrode so as to generate a spark gap. The insulating sleeve includes a shaped tip portion that resides in a recessed end portion of the metal shell. A coating is disposed on the exterior surface of the shaped tip portion of the insulative sleeve. The coating comprises a metal oxide, a noble metal, late transition metal, or a combination comprising two or more of the foregoing metals.

Description

[0001] Related Application Cross Reference [0002] This application claims the benefit of US Provisional Application No. 61 / 420,072, filed December 6, 2010, which is hereby incorporated by reference in its entirety. Background technique [0003] In general, spark plugs include an insulating sleeve having a central axial bore through which a central bore electrode extends. The insulating sleeve is placed and fixed in the metal casing, and the metal casing serves as the installation platform and interface of the internal combustion engine. The metal housing also supports the ground electrode, which is placed in a spaced relationship relative to the center electrode in order to create the spark gap. The insulating sleeve includes a shaped top portion that is seated in a grooved end portion of the metal housing. The shaped tip portion is configured to protect the electrodes from engine heating and combustion products. Spark plugs are generally mounted to the engine cylinder he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01T13/20H01T13/38
CPCC23C18/1216C23C18/1283H01T13/14H01T13/20H01T21/02H01T13/38
Inventor P·D·昂格尔R·P·罗尔巴克杰弗里·伯勒尔郑京
Owner FLAMING GRP INTELLECTUAL PROPERTY LLC
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