Honeywell International Inc.

Edward J Zielinski

Paul Futa

David Tuttle

Larry A Portolese

George Wieger

Hugo N Decampos

Paul W Futa, Jr

Eric Mitchell Arnett

Martin Dutka

A fuel metering system includes a metering valve having a first inlet fluidly coupled to a source of fluid at a first pressure, a second inlet, a first outlet and a second outlet. The metering valve includes a slot, and a valve body movable to control an amount of fluid supplied to the first and second outlet. The fuel metering system includes a servo valve fluidly coupled to the second inlet and to a second source of fluid at a second pressure. The servo valve is in fluid communication with the second inlet and a body of the servo valve is movable to supply a fluid to move the valve body. The slot is configured to variably restrict the flow of the fluid through the second outlet to balance a force applied by a biasing member. The fuel metering system includes a fixed flow restriction downstream of the second outlet.

Fuel metering system

Embodiments of a combined overspeed and fuel stream selector system are provided. In an embodiment, the assembly includes a conduit network, a Discharge Select Valve (DSV), and a shutoff valve. The DSV is fluidly coupled to a primary fuel inlet, a secondary fuel inlet, and a primary fuel outlet included in the conduit network. The shutoff valve is fluidly coupled between the primary fuel inlet and the primary fuel outlet. In a standard operation mode, the shutoff valve is maintained in an open position, while fuel received at the primary fuel inlet is directed through the shutoff valve, through the DSV, and to the primary fuel inlet. Conversely, in a backup operation mode, the shutoff valve is closed to block fuel flow from the primary fuel inlet to the primary fuel outlet, while the DSV directs fuel flow received at the secondary fuel inlet to the primary fuel outlet.

Combined overspeed and fuel stream selector systems

A gas turbine engine fuel supply system includes a primary gear pump and a secondary gear pump. The primary gear pump always actively delivers fuel to the downstream fuel system, and is sized to supply 100% of the burn flow needed at a select low demand condition. The secondary gear pump is sized to make up the remainder of the flow at high demand conditions, and actively delivers fuel to the downstream fuel system only during those conditions. To supply discharge fuel pressures in excess of gear pump capability, a supercharger pump is disposed upstream of the primary and secondary gear pumps. The supercharger pump is preferably activated only during high demand conditions as an additional energy conservation measure.

High efficiency, high pressure gas turbine engine fuel supply system

A gas turbine engine fuel supply system includes a primary gear pump, a secondary gear pump, and a pump bypass valve. The primary gear pump always actively delivers fuel to the downstream fuel system, and is sized to supply 100% of the burn flow needed at a select low demand condition. The secondary gear pump is sized to make up the remainder of the flow at high demand conditions, and actively delivers fuel to the downstream fuel system only during those conditions. To supply discharge fuel pressures in excess of gear pump capability, a supercharger pump is disposed upstream of the primary and secondary gear pumps. The pump bypass valve is configured to regulate fuel pressure at the primary gear pump outlet to one of a plurality of preset differential pressures above one of a plurality of fuel load pressures and prevents reverse pressurization of the gear pumps.

High pressure, multiple metering zone gas turbine engine fuel supply system

A flow divider assembly includes a dividing valve and a balancing valve. The dividing valve includes a dividing cavity configured to receive a flow of fuel and a piston device arranged within the dividing cavity and selectively positioned to divide the flow of fuel in the dividing cavity into the first dividing valve port and the second dividing valve port. The balancing valve is fluidly coupled to the dividing valve and configured to receive the first portion and the second portion of the flow. The balancing valve includes a balancing cavity and a balancing device arranged within the balancing cavity and selectively positioned to direct the first portion of the flow into the first balancing cavity port at a third pressure and the second portion of the flow into the second balancing cavity port at a fourth pressure such that the first pressure is approximately equal to the second pressure.

Combustor fuel control systems with flow divider assemblies

A fuel system includes a first fuel line carrying fuel at a first line pressure (P), a second fuel line carrying fuel at a second line pressure (PFNC) greater than the first line pressure (P), at least one pressure regulating sectionhaving an inputconnected to the second fuel line and at least one output (), a first pressure regulator () connected to the input and a second pressure regulator () connected between the first pressure regulator () and the at least one output (), and a controller () controlling the position of the first and second pressure regulators () to produce at the output () one of a predetermined number of output pressures relative to the first line pressure (P).

Method and apparatus generating multiple pressure signals in a fuel system

A modular reed switch assembly and method for making the same are provided. A switch assembly () includes a reed switch () that is enclosed between a primary reed switch cover () and a reed switch base () wherein the reed switch cover and reed switch base are recessed to accommodate the reed switch. A secondary reed switch cover () further covers the primary reed switch cover () and the secondary reed switch cover () connects with the reed switch base (). A protrusion () provides access to the electrical contacts () of the reed switch () through the primary reed switch cover () and secondary reed switch covers ().

Modular reed switch assembly and method for making

A modular reed switch assembly and method for making the same are provided. A switch assembly ( ) includes a reed switch ( ) that is enclosed between a primary reed switch cover ( ) and a reed switch base ( ) wherein the reed switch cover and reed switch base are recessed to accommodate the reed switch. A secondary reed switch cover ( ) further covers the primary reed switch cover ( ) and the secondary reed switch cover ( ) connects with the reed switch base ( ). A protrusion ( ) provides access to the electrical contacts ( ) of the reed switch ( ) through the primary reed switch cover ( ) and secondary reed switch covers ( ).

Growing community of inventors

Cincinnati, OH, United States of America

Edward J Zielinski