Combustion chamber pressure transducer and method of making same

Details Combustion chamber pressure transducer and method of making same Combustion chamber pressure transducer and method of making same

1994-11-14

1996-09-24

Chilcot, Richard

Measuring and testing

Engine detonation

Specific type of detonation sensor

73721, 73727, G01L 708, G01L 906

Patent

active

055592805

ABSTRACT:
A transducer housing for mounting a port in a combustion chamber has a metal diaphragm exposed to the combustion gasses. The pressure of the combustion gasses deflects the diaphragm which locally deflects a simply supported beam. The beam is formed of refractory material having epitaxially grown crystalline piezoresistors formed on one surface of the beam and connected in a bridge circuit. Noble metal foil leads connect to the piezoresistors to form the bridge and provide attachment pads. The pads are noble metal welded to other noble metal foil pads provided on a ceramic substrate to form a sensor subassembly for mounting adjacent the diaphragm to form a transducer.

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