Gas turbine fuel control including timing device for scheduling acceleration
First Claim
1. A FUEL CONTROL FOR AN ENGINE HAVING A COMPRESSOR INCLUDING A FUEL CONDUIT TO SAID ENGINE, A METERING VALVE IN SAID CONDUIT, A BYPASS VALVE FOR CONTROLLING THE PRESSURE DROP ACROSS SAID METERING VALVE, A MULTIPLYING DEVICE OPERATIVELY CONNECTED TO SAID METERING VALVE, AN ALL-SPEED GOVERNOR INCLUDING A GOVERNOR SPRING OPERABLY CONNECTED TO SAID MULTIPLYING DEVICE, MEANS RESPONSIVE TO A COMPRESSOR GENERATED PRESSURE OPERATIVELY CONNECTED TO SAID MULTIPLYING DEVICE, A CYLINDER, A PISTON IN SAID CYLINDER, MEANS MOVABLE IN RESPONSE TO MOVEMENT OF SAID PISTON FOR VARYING THE EFFECTIVE FORCE OF SAID GOVERNOR SPRING, A PILOT VALVE CONNECTED TO SAID CYLINDER AND OPERATIVE WHEN IN A FIRST POSITION TO PROVIDE COMMUNICATION BETWEEN SAID CYLINDER AND A SOURCE OF HIGH PRESSURE FUEL UPSTREAM OF SAID METERING VALVE, WHEN IN A SECOND POSITION TO PROVIDE COMMUNICATION BETWEEN SAID CYLINDER AND A PASSAGE COMMUNICATING WITH A LOW FLUID PRESSURE SOURCE, AND WHEN IN A THIRD POSITION TO BLOCK COMMUNICATION BETWEEN SAID CYLINDER AND SAID SOURCES, OPERATOR OPERATED MEANS FOR CAUSING SAID PILOT VALVE TO ASSUME EITHER OF SAID FIRST OR SECOND POSITIONS AND FOLLOW-UP MEANS RESPONSIVE TO MOVEMENT OF SAID PISTON TO CAUSE SAID PILOT VALVE TO SEEK SAID THIRD POSITION, A TIMING BLEED IN SAID PASSAGE, MEANS CONTINUOUSLY RESPONSIVE TO A VARIABLE INPUT SIGNAL INDICATIVE OF A DESIRED SCHEDULE OF ENGINE OPERATION OPERATIVELY CONNECTED TO SAID TIMING BLEED FOR VARYING THE EFFECTIVE AREA THEREOF AS A FUNCTION OF SAID VARIABLE INPUT SIGNAL DURING OPERATION OF THE ENGINE AND REGULATING MEANS FOR MAINTAINING A DESIRED PRESSURE DROP ACROSS SAID BLEED.
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Accused Products
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Citations
1 Claim
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1. A FUEL CONTROL FOR AN ENGINE HAVING A COMPRESSOR INCLUDING A FUEL CONDUIT TO SAID ENGINE, A METERING VALVE IN SAID CONDUIT, A BYPASS VALVE FOR CONTROLLING THE PRESSURE DROP ACROSS SAID METERING VALVE, A MULTIPLYING DEVICE OPERATIVELY CONNECTED TO SAID METERING VALVE, AN ALL-SPEED GOVERNOR INCLUDING A GOVERNOR SPRING OPERABLY CONNECTED TO SAID MULTIPLYING DEVICE, MEANS RESPONSIVE TO A COMPRESSOR GENERATED PRESSURE OPERATIVELY CONNECTED TO SAID MULTIPLYING DEVICE, A CYLINDER, A PISTON IN SAID CYLINDER, MEANS MOVABLE IN RESPONSE TO MOVEMENT OF SAID PISTON FOR VARYING THE EFFECTIVE FORCE OF SAID GOVERNOR SPRING, A PILOT VALVE CONNECTED TO SAID CYLINDER AND OPERATIVE WHEN IN A FIRST POSITION TO PROVIDE COMMUNICATION BETWEEN SAID CYLINDER AND A SOURCE OF HIGH PRESSURE FUEL UPSTREAM OF SAID METERING VALVE, WHEN IN A SECOND POSITION TO PROVIDE COMMUNICATION BETWEEN SAID CYLINDER AND A PASSAGE COMMUNICATING WITH A LOW FLUID PRESSURE SOURCE, AND WHEN IN A THIRD POSITION TO BLOCK COMMUNICATION BETWEEN SAID CYLINDER AND SAID SOURCES, OPERATOR OPERATED MEANS FOR CAUSING SAID PILOT VALVE TO ASSUME EITHER OF SAID FIRST OR SECOND POSITIONS AND FOLLOW-UP MEANS RESPONSIVE TO MOVEMENT OF SAID PISTON TO CAUSE SAID PILOT VALVE TO SEEK SAID THIRD POSITION, A TIMING BLEED IN SAID PASSAGE, MEANS CONTINUOUSLY RESPONSIVE TO A VARIABLE INPUT SIGNAL INDICATIVE OF A DESIRED SCHEDULE OF ENGINE OPERATION OPERATIVELY CONNECTED TO SAID TIMING BLEED FOR VARYING THE EFFECTIVE AREA THEREOF AS A FUNCTION OF SAID VARIABLE INPUT SIGNAL DURING OPERATION OF THE ENGINE AND REGULATING MEANS FOR MAINTAINING A DESIRED PRESSURE DROP ACROSS SAID BLEED.
Specification
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Current AssigneeAlbert P. Schnaible, Howard L. Mccombs
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Original AssigneeAlbert P. Schnaible, Howard L. Mccombs
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InventorsMccombs, Howard L., Schnaible, Albert P.
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Application NumberUS03/781,641Time in Patent Office1,502 DaysField of SearchUS Class Current60/39.281CPC Class CodesF02C 9/28 Regulating systems responsi...F02C 9/32 characterised by throttling...Y02T 50/60 Efficient propulsion techno...Y10T 137/2409 With counter-balancing pres...
