Pressure sensor for determination of pressure in the combustion chamber of an internal combustion engine

US5199303A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

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

Key dates

• Filing date: Jul 5, 1991
• Grant date: Apr 6, 1993
• Expiry date: Jul 5, 2011

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L23/18
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A pressure sensor for determination of pressure in a combustion chamber of an internal combustion engine, particularly for motor vehicles has a housing, a membrane associated with the housing, a sensor element, a plunger supplying a pressure to be determined to the sensor element and located in the housing. The housing has at least one housing opening and a shaft and the membrane closing the opening of the housing and is connected with the shaft of the housing in the region of a side wall so that a bottom of the membrane is flexible and a pressure to be determined is transferable to the plunger, a counter bearing for the plunger. A support is provided for a hybrid and composed of ceramic material and located on the counter bearing for the plunger. The sensor element is a piezoresistive measuring element and located on the hybrid so as to produce an electrical signal corresponding to the pressure.