Metering valve temperature compensation

Details Metering valve temperature compensation Metering valve temperature compensation

G - Physics

05

D

236/3

G05D 7/01 (2006.01)

Patent

CA 1304335

Abstract Metering Valve Temperature Compensation An apparatus for correcting the weight flow of fluid passing through a fuel control is shown. A bimetallic probe is placed within a metering spool to sense temperature variation of the fuel passing therethrough. A feedback mechanism senses changes in the probe and nulls the spool. The spool cooperates with specially shaped windows in a sleeve 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 is comprised of a rod and a perforated shell. - 13 -

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