David A Tuttle

US Patent:

7200985, Apr 10, 2007

Filed:

May 18, 2004

Appl. No.:

10/847813

Inventors:

David J. Tuttle - South Bend IN, US
Steven Fisher - South Bend IN, US
Christopher D. Eick - Phoenix AZ, US
Michael A. McPherson - Phoenix AZ, US

Assignee:

Honeywell International Inc. - Morris Township NJ

International Classification:

F02C 7/232
F02C 9/26

US Classification:

60 39094, 60 39281

Abstract:

A fuel control system for a gas turbine engine is disclosed that includes a flow path carrying fuel from a fuel source to a combustion chamber, an ecology valve for removing a quantity of fuel from the flow path, the ecology valve being shiftable in a first direction from a first position to a second position and in a second direction from said second position to said first position and a fuel line connected between the flow path and the ecology valve for moving fuel between the flow path and the ecology valve to bias the ecology valve toward the second position, where the fuel line is configured, such as by the inclusion of an orificed check valve 150 therein, to allow fuel to move therethrough away from the ecology valve at a greater rate than toward the ecology valve.

US Patent:

7966995, Jun 28, 2011

Filed:

Sep 5, 2007

Appl. No.:

11/850302

Inventors:

Gregory A. Lafferty - Plymouth IN, US
David J. Lawrence - South Bend IN, US
David J. Tuttle - South Bend IN, US

Assignee:

Honeywell International Inc. - Morristown NJ

International Classification:

F02M 37/04
F02M 37/00

US Classification:

123511, 60 39281

Abstract:

A system and method provide dual level pressurization control of a fuel supply system based on whether fuel is being supplied to one or more secondary fuel loads. Fuel pump discharge backpressure is maintained above either a first minimum pressure value or a lower second minimum pressure value by determining whether fuel is being supplied to one or more secondary fuel loads. The fuel pump discharge pressure is maintained above the first minimum pressure value if it is determined that fuel is being supplied to the one or more secondary loads. The fuel pump discharge backpressure is maintained above the lower second minimum pressure value if it is determined that fuel is not being supplied to the one or more secondary loads.

US Patent:

20130327044, Dec 12, 2013

Filed:

Jun 6, 2012

Appl. No.:

13/490169

Inventors:

Larry Portolese - Granger IN, US
Gregory Kline - South Bend IN, US
Paul W. Futa - North Liberty IN, US
David Tuttle - South Bend IN, US
Brad McRoberts - Mishawaka IN, US
Greg Lafferty - Plymouth IN, US

Assignee:

Honeywell International Inc. - Morristown NJ

International Classification:

F02C 7/232
F16K 11/20
F02C 7/22

US Classification:

60734, 137637

Abstract:

A system provides “fail fixed” functionality and allows a user to manually manipulate fuel flow to a gas turbine engine in the unlikely event the primary control means is unavailable. The fuel metering unit includes a fuel metering valve, a flow increase valve, and a flow decrease valve. The flow increase valve and flow decrease valves are both in fluid communication with the fuel metering valve and are each adapted to selectively receive fuel flow commands from a primary fuel flow command source and from a secondary fuel flow command source. The flow increase and decrease valves are responsive to the fuel flow commands to selectively control the position of the fuel metering valve.

US Patent:

57751986, Jul 7, 1998

Filed:

Mar 7, 1997

Appl. No.:

8/813474

Inventors:

David J. Tuttle - South Bend IN
Edward J. Zielinski - South Bend IN

Assignee:

AlliedSignal Inc. - Morristown NJ

International Classification:

F15B 1110

US Classification:

91433

Abstract:

A control system (10) for a limited stall load actuator (60) comprises a servo pressure regulator (20), solenoid valve (40), relief valve (30) and a shuttle valve (50) connected with a piston actuator 60 such that when source pressure P1 is declining the servo pressure regulator (20) will open to permit more flow and maintain a minimum actuation force effected by the actuator (60), and should there occur a failure of the servo pressure regulator (20) that would permit high source pressure to be communicated to the control system (10), the relief valve (30) will operate to limit the amount of high pressure communicated to the control system (10) such that the actuator (60) will attain no greater than a predetermined maximum output force.

US Patent:

20140196459, Jul 17, 2014

Filed:

Mar 14, 2013

Appl. No.:

13/828199

Inventors:

- Morristown NJ, US
Edward Zielinski - South Bend IN, US
Larry Portolese - Granger IN, US
David Tuttle - South Bend IN, US

Assignee:

HONEYWELL INTERNATIONAL INC. - Morristown NJ

International Classification:

F02C 7/22

US Classification:

60734

Abstract:

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.