Pressure sensor for detecting the pressure in the combustion chamber of internal-combustion engines

US5315875A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Walter Benedikt
• Manfred Vogel · Ditzingen, DE
• Werner Herden · Gerlingen, DE
• Johann Konrad · Eichberg, DE
• Wolfgang Schmidt
• Josef Tosch
• Matthias Kuessel · Ditzingen, DE

Key dates

• Filing date: Mar 3, 1992
• Grant date: May 31, 1994
• Expiry date: Mar 3, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L9/0052
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A pressure sensor for detecting pressure in a combustion chamber of internal combustion engines has a housing, a sensor element composed of a piezoresistive material and arranged in the housing, a diaphragm, a punch introducing a pressure to be determined onto the sensor element and located between the diaphragm and the sensor element. The punch has a counterbearing, a hybrid has a base, and a preprocessing circuit has electronic components. The sensor element, the hybrid with its base and the electronic components of the preprocessing circuit are located on the counterbearing of the punch.