Pressure-measuring device with additional diaphragm

US9500365B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Anke Maier-Schleich · Leutenbach, DE
• Janpeter Wolff · Gerlingen, DE
• Wolfgang Koetzle · Ehningen, DE
• Christian Doering · Stuttgart, DE
• Juergen Krueger · Bremen, DE
• Holger Scholzen · Stuttgart, DE
• Martin Ammann · Felben-Wellhausen, CH
• Michael Mueller · Oettingen, DE

Key dates

• Filing date: Nov 30, 2012
• Grant date: Nov 22, 2016
• Expiry date: Jul 24, 2033

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F23Q2007/005
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A pressure-measuring device for recording a pressure in a combustion chamber of an internal combustion engine, having a force transmission body, situated in a housing, which is exposed to the combustion chamber and which transmits the combustion chamber pressure to a pressure-measuring unit at least indirectly by an axial motion, and having a flexible diaphragm, which is situated between the force transmission body and the housing. The flexible diaphragm is configured to be resilient to implement the axial motion of the force transmission body within the housing. A flexible additional diaphragm is connected ahead of the flexible diaphragm on the combustion chamber side, which seals the flexible diaphragm from the combustion chamber.