Patent · US Expired

Method of manufacturing a spark plug for an internal combustion engine

US6971937B2 · kind B2 · utility

4Cited by

5References

6Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Lars Menken · Donzdorf, DE
Bernd Reinsch · Ludwigsburg, DE
Klaus Hrastnik · Stuttgart, DE
Dietrich Trachte · Leonberg, DE
Klaus Czerwinski · Iggingen, DE

Key dates

Filing date	Feb 6, 2001
Grant date	Dec 6, 2005
Priority date	—
Expiry date	Apr 2, 2021

Classification

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

Abstract

A spark plug for an internal combustion engine is proposed, having at least two electrodes (9, 11), one of which at least two electrodes is at least one middle electrode (11) and another electrode of the at least two electrodes is at least one ground electrode (9), and between the at least one ground electrode (9) and the at least one middle electrode (11), a spark gap (13) is formed. Each of the at least two electrodes (9, 11) has an electrode base body (93, 113). At least one electrode has a region (95, 115) that is highly resistant to electrode erosion and that forms at least a part of the end face, oriented toward the spark gap, of the electrode (97, 117). The highly electrode-erosion-resistant region (95, 115) comprises an alloy which has at least the elements iridium and nickel.

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