Measuring and testing – Engine detonation – Combustion signal compared to reference signal varied by a...
Patent
1983-10-11
1985-01-22
Gill, James J.
Measuring and testing
Engine detonation
Combustion signal compared to reference signal varied by a...
73714, G01L 2322
Patent
active
044944012
ABSTRACT:
To sense pressure within the combustion chamber of an internal combustion engine (ICE), a plug element which already extends into the combustion chamber of the ICE, such as a sparkplug, or a glow plug, has a layer-like resistor applied to a ceramic insulator extending into the combustion chamber, for example, directly on the central insulator of a sparkplug or on the side of a ceramic glow plug bushing or plug element. If applied to a sparkplug then, preferably, the heater is shielded by metallic layers, separated from the metallic shielding layers by insulating layers, of which the top metallic layer preferably is platinum or a platinum-type metal to catalyze combustion of residues which, otherwise, might collect on the top layer and interfere with proper sensor operation. The layer-like sensor and conductive tracks may be of thick film construction; stamp-on printing with flexible printing stamps is suitable to apply the layer-like resistors.
REFERENCES:
patent: 2864972 (1958-12-01), Li
patent: 2946939 (1960-12-01), Forrest
patent: 4227403 (1980-10-01), Dooley et al.
Dobler Klaus
Frey Thomas
Grunwald Werner
Heinz Rudolf
Schoor Ulrich
Gill James J.
Robert & Bosch GmbH
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