Hydro-mechanical fuel control

Claim 1

A FUEL CONTROL FOR A TURBINE ENGINE OR THE LIKE HAVING COMPLEX FUEL METERING CAPABILITIES COMPRISING A FUEL METERING SECTION INCLUDING A FUEL METERING VALVE FOR REGULATING THE FUEL FLOW TO THE ENGINE AND A SEPARATE COMPUTER SECTION SECURED TO THE FUEL METERING SECTION INCLUDING PRIMARY FUEL METERING PARAMETER SENSING MEANS, SLAVE MEANS CARRIED BY THE COMPUTER SECTION AND ENGAGED WITH THE FUEL METERING VALVE IN THE FUEL METERING SECTION AND RESPONSIVE TO THE PRIMARY FUEL METERING PARAMETER FOR MOVING THE FUEL METERING VALVE TO METER FUEL TO THE ENGINE IN ACCORDANCE WITH A PREDETERMINED METERED FUEL TO PRIMARY FUEL METERING PARAMETER VALUE RATIO COMPRISING A SERVO SYSTEM INCLUDING A DIFFERENTIAL AREA SLAVE PISTON, A ROD POSITIONED BETWEEN AND ENGAGED WITH THE SLAVE PISTON AND FUEL METERING VALVE, A SERVO VALVE, A SOURCE OF FLUID UNDER CONSTANT PRESSURE, A FLUID PASSAGE FROM THE SOURCE OF FLUID TO ONE SIDE OF THE DIFFERENTIAL AREA PISTON, A RESTRICTED FLUID FLOW PASSAGE FROM ONE SIDE TO THE OTHER SIDE OF THE DIFFERENTIAL AREA PISTON, AN EXHAUST PASSAGE THROUGH THE SERVO VALVE IN SERIES WITH THE FLUID PASSAGE AND RESTRICTED FLUID FLOW PASSAGE, A PIVOTALLY MOUNTED LEVER OPERABLE ON PIVOTAL MOVEMENT TO VARY THE OPENING OF THE SERVO VALVE, RESILIENT MEANS OPERABLE BETWEEN THE DIFFERENTIAL AREA PISTON AND THE LEVER BIASING THE PISTON TOWARD THE MAIN FUEL METERING VALVE, MEANS OPERABLY ASSOCIATED WITH THE PRIMARY FUEL METERING PARAMETER SENSING MEANS FOR DEVELOPING A VARIABLE FORCE PROPORTIONAL TO THE VALUE OF THE PRIMARY FUEL METERING PARAMETER, MEANS FOR APPLYING THE VARIABLE FORCE TO THE LEVER INCLUDING AN AXIALLY MOVABLE MEMBER EXTENDING SUBSTANTIALLY PARALLEL TO THE LEVER, A ROLLER ROTATABLY MOUNTED ON SAID AXIALLY MOVABLE MEMBER AND MOVABLE ALONG ONE SURFACE OF THE LEVER ON ONE SIDE OF THE AXIALLY MOVABLE MEMBER AND PRESSURE RESPONSIVE FORCE TRANSFER MEANS ENGAGED WITH THE ROLLER ON THE OPPOSITE SIDE OF THE AXIALLY MOVABLE MEMBER RESPONSIVE TO THE VARIABLE FORCE AND A PLURALITY OF OTHER ENGINE PARAMETER SENSING MEANS AND MEANS ENGAGED WITH AND RESPONSIVE TO THE OTHER ENGINE PARAMETER SENSING MEANS FOR MOVING THE AXIALLY MOVABLE MEMBER AXIALLY TO VARY THE POSITION OF THE ROLLER ALONG THE ONE SURFACE OF THE LEVER TO VARY THE METERED FUEL TO PRIMARY FUEL METERING PARAMETER VALUE RATIO INCLUDING A SINGLE THREE DIMENSIONAL CAM HAVING GOVERNOR AND ACCELERATION PORTIONS, MEANS CONNECTED TO THE CAM FOR MOVING THE CAM AXIALLY AND ROTATING THE CAM IN ACCORDANCE WITH THE OTHER ENGINE PARAMETERS SENSED, PIVOTALLY MOUNTED GOVERNOR AND ACCELERATION LEVERS ALTERNATIVELY ENGAGEABLE WITH SAID GOVERNOR AND ACCELERATION PORTIONS OF THE CAM RESPECTIVELY HAVING FREE ENDS WHICH ARE PIVOTALLY ENGAGED, A PIVOTALLY MOUNTED LINKAGE CONNECTED AT ONE END IN A FIXED POSITION AND AT THE OTHER TO THE AXIALLY MOVABLE MEMBER AND A SINGLE FORCE TRANSFER ROD PIVOTALLY ENGAGED WITH AND EXTENDING BETWEEN THE FREE ENDS OF THE ACCELERATION AND GOVERNOR LEVERS AND THE PIVOTALLY MOUNTED LINKAGE.