Back to results
US 4,753,109 AGranted
Sensor for scanning physical processes in internal combustion engines
AssigneeRobert Bosch GmbH
InventorErich Zabler
Life of this patent
Estimating the term…
Abstract
A sensor for scanning physical processes in a combustion chamber of an internal combustion engine includes a pressure-sensitive element formed by two sapphire small parts one of which has a recess and forms a pressure diaphragm to which resistors are applied. The sensor is formed by means of the silicon-on-sapphire technology.
Claims12
In a sensor for scanning physical processes in a combustion chamber of an internal combustion engine, comprising a housing;
- at least one pressure-responsive element positioned in said housing a facing said combustion chamber, the improvement comprising said pressure-responsive element being formed of alpha-crystalline aluminum-oxide and including strain-responsive resistors (26) applied to said element by silicon-on-sapphire technology, said pressure-responsive element being freely suspended in said housing at least in the region of said resistors.
Dependencies are inferred from the claim text.