Patent · US Expired

Pencil-type glow plug having an integrated combustion chamber pressure sensor

US7581520B2 · kind B2 · utility

19Cited by

1References

11Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Christoph Kern · Aspach, DE
Steffen Schott · Schwieberdingen, DE
Markus Ledermann · Asperg, DE
Pavlo Saltikov · Waiblingen, DE

Key dates

Filing date	Nov 28, 2005
Grant date	Sep 1, 2009
Priority date	—
Expiry date	Dec 21, 2025

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF23Q2007/002
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A pencil-type glow plug for a self-igniting internal combustion engine is described. The pencil-type glow plug includes a plug body in which a combustion chamber pressure sensor is integrated, and a bar-shaped heating element that protrudes out from the plug body at one end, into the combustion chamber of the internal combustion engine. A force-measuring element of the combustion chamber pressure sensor is accommodated behind the heating element, which moves axially under the influence of force. The force-measuring element is sealed against combustion chamber gases by a steel diaphragm made of a stainless precipitation-hardened maraging steel.

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