Metering valve temperature compensation

An apparatus for correcting the weight flow of fluid passing through a fuel control (10) is shown. A bimetallic probe (12) is placed within a metering spool (24) to sense temperature variation of the fuel passing therethrough. A feedback mechanism (46) senses changes in the probe (12) and nulls the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BELANGER, RENE FRANCIS, STEARNS, CHARLES FREDERICK, PERKINSON, ROBERT HOWARD
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MEASURING MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL MECHANICAL ENGINEERING METERING BY VOLUME PHYSICS REGULATING SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR WEAPONS
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Beschreibung
Zusammenfassung:	An apparatus for correcting the weight flow of fluid passing through a fuel control (10) is shown. A bimetallic probe (12) is placed within a metering spool (24) to sense temperature variation of the fuel passing therethrough. A feedback mechanism (46) senses changes in the probe (12) and nulls the spool (24). The spool (24) cooperates with specially shaped windows (30) in a sleeve (26) so that a percentage change in temperature allows a corresponding percentage change in fuel flow thereby offsetting changes in fuel density (and weight flow) caused by temperature changes. The probe (12) is comprised of a rod (44) and a perforated shell (42).