Patent · US Active

Dual diaphragm combustion pressure measuring device

US8857249B2 · kind B2 · utility

1Cited by

2References

16Claims

0Family size

Assignee

BORGWARNER BERU SYSTEMS GMBH · DE

Inventors

Christian Pottiez · Eppingen, DE
Bernd Last · Reutlingen, DE
Georg Rixecker · Echterdingen, DE
Martin Sackmann · Memmingen, DE

Key dates

Filing date	Aug 22, 2011
Grant date	Oct 14, 2014
Priority date	—
Expiry date	Jun 11, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG01L23/22
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A pressure measuring device includes a housing and a rod which is movable in the axial direction in the housing under the effect of combustion chamber pressure where the rod protrudes from the housing. A sensor measure combustion chamber pressure acting on the rod, and a first diaphragm is attached to the housing through which the rod extends. A second diaphragm is attached to the housing through with the rod extends between the sensor and the first diaphragm. The second diaphragm generates a return force when the rod undergoes axial displacement caused by pressure on the rod.

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