The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 03, 1996
Filed:
Apr. 10, 1995
Martin J Dutka, South Bend, IN (US);
Rick L Poelstra, Granger, IN (US);
Timothy F Wiegand, South Bend, IN (US);
Paul W Futa, Jr, North Liberty, IN (US);
AlliedSignal Inc., Morristown, NJ (US);
Abstract
A mechanical governor for use in a fuel management system having a fuel metering loop responsive to an electronic computer for supplying fuel to a combustion chamber of a turbine. The mechanical governor includes a cylindrical spinning spool valve assembly located in a bore which is responsive to an operational force derived from the rotation of the turbine. In a first mode of operation, communication of control pressure P.sub.c to an integrator valve assembly is inhibited by a first spring associated with the spool valve assembly while in a second mode of operation communication of an operational fluid pressure P.sub.x derived from the control pressure P.sub.c is communicated to the integrator valve assembly after an operational force corresponding to the rotation overcomes the first spring. In the first and second modes of operation, fuel is supplied to the combustion chamber as a function of a pressure differential across the fuel metering loop. Movement of the spool valve assembly is opposed and fuel is supplied to the combustion chamber under the first and second modes of operation until an operational force overcomes a second spring and the pressure differential across the fuel metering loop is lowered to reduce the fuel supplied to the combustion chamber and correspondingly the rotation of the turbine to prevent an over speed condition.