Pressure-measuring device

US7954382B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Christoph Kern · Aspach, DE
• Ewgenij Landes · Waiblingen, DE
• Reiko Zach · Waiblingen, DE
• Michael Schuettoff · Deckenpfronn, DE
• Michael Kleindl · Schwieberdingen, DE
• Christian Doering · Stuttgart, DE
• Steffen Schott · Schwieberdingen, DE
• Pavlo Saltikov · Waiblingen, DE

Key dates

• Filing date: Oct 16, 2007
• Grant date: Jun 7, 2011
• Expiry date: Dec 27, 2027

Classification

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

Abstract

A pressure-measuring device is situated in a chamber of an internal combustion engine. The pressure-measuring device has a housing, a force-transmitting element that protrudes partly from the housing at a chamber-side opening of the housing, and a pressure sensor that is situated in an interior space of the housing. The pressure sensor stands in effective connection to the force-transmitting element. In addition, a diaphragm is provided that seals the interior space of the housing, in which the pressure sensor is situated, against the chamber-side opening. The diaphragm, which is preferably fashioned as a metal diaphragm, has a force-transmitting segment that is oriented in an axial direction of the force-transmitting element. Moreover, the pressure sensor stands in effective connection with the force-transmitting element via the force-transmitting segment of the diaphragm. In this way, there takes place at least a partial compensation of thermally caused changes in length of the diaphragm, caused for example by hot combustion gases, and resulting in periodic impairments of the pressure measurement made by the pressure sensor.