Patent · US Expired

Spark plug for an internal combustion engine

US6628051B1 · kind B1 · utility

12Cited by

7References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Lars Menken · Donzdorf, DE
Bernd Reinsch · Ludwigsburg, DE

Key dates

Filing date	May 14, 2001
Grant date	Sep 30, 2003
Priority date	—
Expiry date	Jul 10, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH01T13/39
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A spark plug having a ceramic insulator, which contains a precious-metal center electrode in a cylindrical, axial opening, at the end on the side of the combustion chamber. A contact pin is arranged in the cylindrical opening, downstream from the precious-metal center electrode, in the direction of the insulator end away from the combustion chamber. To reduce corrosion, the surface of the contact pin is provided with a layer of one or more metal aluminides.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.