Patent · US Active

Laser spark plug having an improved seal between the combustion chamber window and the casing

US9742156B2 · kind B2 · utility

0Cited by

5References

17Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Joerg Engelhardt · Ditzingen, DE
Dieter Wolz · Bad Boll, DE
Juergen Raimann · Weil der Stadt, DE
Pascal Woerner · Ditzingen, DE
Martin Weinrotter · Stuttgart, DE

Key dates

Filing date	Sep 24, 2012
Grant date	Aug 22, 2017
Priority date	—
Expiry date	May 9, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH01T14/00
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A casing for a laser spark plug, in particular, of an internal combustion engine of a motor vehicle, or of a stationary engine; the casing including at least one casing part and a combustion chamber window joined to the casing part to form a seal at least regionally; characterized in that at least one sealing element, whose coefficient of thermal expansion at an operating temperature of the laser spark plug is greater than the coefficient of thermal expansion of the casing part at the operating temperature of the laser spark plug, is provided between the casing part and the combustion chamber window.

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