Dennis G Demers

US Patent:

6357219, Mar 19, 2002

Filed:

Sep 17, 1999

Appl. No.:

09/398133

Inventors:

Dennis G. Demers - Mishawaka IN

Assignee:

AlliedSignal Inc. - Morristown NJ

International Classification:

F02C 726

US Classification:

60 39141, 60 39281

Abstract:

A turbine engine fuel delivery system ( ) and method has, in addition to the conventional fuel bypass ( ) for diverting fuel exiting a fuel control ( ) away from the engine ( ) and back to a fuel pump ( ) to maintain a relatively constant pressure differential across the fuel control ( ), a separate controllable flow fuel bypass ( ) for selectively diverting fuel exiting the fuel control ( ) away from the engine ( ) and back to the fuel pump ( ) to decrease the rate of fuel flow to the engine ( ) and correct an overtemperature condition, and an arrangement for enabling the controllable fuel flow bypass ( ) during engine ( ) start-up and disabling the controllable fuel flow bypass ( ) when the engine ( ) reaches normal idle speed. Once an engine ( ) start or light off is detected, the system ( ) automatically prevents turbine outlet temperature exceedences by reducing metered fuel flow to the engine nozzle. The controllable fuel bypass ( ) includes a solenoid operable valve ( ).

US Patent:

6422023, Jul 23, 2002

Filed:

Jul 18, 2001

Appl. No.:

09/908427

Inventors:

Dennis G. Demers - Mishawaka IN

Assignee:

AlliedSignal Inc. - Morristown NJ

International Classification:

F02C 928

US Classification:

60773

Abstract:

A turbine engine ( ) fuel delivery system of the type including a pneumatic governor has an electronic governor and an engine excess stress avoidance feature which disable the pneumatic governor ( ) so long as the engine speed exceeds a prescribed value and an electronic control unit ( ) continues to function properly. The system transfers governing responsibility to the electronic control unit ( ) which controls a torque motor and solenoid valve fuel diversion line ( ). The system monitors an engine ( ) operating parameter such as gas generator speed ( ), power turbine speed, engine output torque, or engine temperature and further diminishes fuel flow to the engine ( ) when the monitored parameter exceeds a threshold value. The system resumes normal speed governoring flow when that parameter returns to an acceptable level. The system also senses rotor blade pitch to reduce rotor droop and increases fuel flow to the engine ( ) when the pitch ( ) increases, and decreasing the fuel flow to the engine ( ) when the rotor blade pitch ( ) decreases.

US Patent:

6715278, Apr 6, 2004

Filed:

Jun 14, 2002

Appl. No.:

10/171951

Inventors:

Dennis G. Demers - Mishawaka IN 46545

International Classification:

F02C 928

US Classification:

60 39281

Abstract:

A fuel metering device ( ) and method for metering fuel to an engine ( ) provides bumpless transfer to a backup mode. A common cavity ( ) provides pressure relief, fuel metering and bypass of fuel flow. A metering valve ( ) for scheduling fuel flow to the engine ( ) and the metering valve ( ) is controlled in either a primary mode or a backup mode. A pressure relief valve ( ) limits the maximum pump discharge pressure of a fuel pump. A bypass valve ( ) maintains a constant pressure across the metering valve ( ) by redirecting non-metered fuel flow back to a pump stage inlet. An electrical clutch ( ) determines whether the metering valve ( ) function is accomplished by said primary mode or said backup mode. Bumpless transfer to a backup is accomplished automatically.

US Patent:

6751939, Jun 22, 2004

Filed:

Jun 25, 2002

Appl. No.:

10/179783

Inventors:

Dennis G. Demers - Mishawaka IN

Assignee:

Honeywell International Inc. - Morristown NJ

International Classification:

F02C 7232

US Classification:

60 39094, 60739

Abstract:

A fuel flow dividing ecology valve conveys fuel from a fuel source to at least a secondary gas turbine engine intake manifold during engine operation and withdraws fuel therefrom upon cessation of engine operation. The valve includes a flow dividing valve portion having an inlet coupled to the fuel source and an outlet coupled to the secondary manifold. The valve also includes an ecology valve portion controlled by the fuel pressure differential between the fuel source and the flow restricting inlet. The ecology valve portion includes a housing with a movable piston disposed therein. The piston defines, in conjunction with the housing, a variable volume chamber for withdrawing fuel from the engine intake manifolds. When the engine is de-energized, the piston moves from a first position toward a second position thereby purging the manifolds of fuel.

US Patent:

6912837, Jul 5, 2005

Filed:

Feb 6, 2004

Appl. No.:

10/773359

Inventors:

Dennis G. Demers - Mishawaka IN, US

Assignee:

Honeywell International Inc. - Morristown NJ

International Classification:

F02C009/28

US Classification:

60 39281

Abstract:

A fuel metering device () and method for metering fuel to an engine () provides bumpless transfer to a backup mode. A common cavity () provides pressure relief, fuel metering and bypass of fuel flow. A metering valve () for scheduling fuel flow to the engine () and the metering valve () is controlled in either a primary mode or a backup mode. A pressure relief valve () limits the maximum pump discharge pressure of a fuel pump. A bypass valve () maintains a constant pressure across the metering valve () by redirecting non-metered fuel flow back to a pump stage inlet. An electrical clutch () determines whether the metering valve () function is accomplished by said primary mode or said backup mode. Bumpless transfer to a backup is accomplished automatically.

US Patent:

6955113, Oct 18, 2005

Filed:

Nov 7, 2002

Appl. No.:

10/289886

Inventors:

Dennis G. Demers - Mishawaka IN, US

Assignee:

Honeywell International Inc. - Morristown NJ

International Classification:

F15B009/10

US Classification:

91382

Abstract:

A method and apparatus for an electro-hydraulic actuator () having mechanical feedback provide closed loop control with a high degree of accuracy. The electro-hydraulic actuator () includes a current versus load generator (), a single-stage servomechanism (), and a device () for providing a mechanical feedback force for offsetting an input force (Fsol) of the current versus load generator ().

US Patent:

7093420, Aug 22, 2006

Filed:

Apr 27, 2004

Appl. No.:

10/832674

Inventors:

Dennis G. Demers - Mishawaka IN, US

Assignee:

Honeywell International Inc. - Morris Township NJ

International Classification:

F02C 7/228

US Classification:

60 39094

Abstract:

A fuel flow dividing ecology valve conveys fuel from a fuel source to at least a secondary gas turbine engine intake manifold during engine operation and withdraws fuel therefrom upon cessation of engine operation. The valve includes a flow dividing valve portion having an inlet coupled to the fuel source and an outlet coupled to the secondary manifold. The valve also includes an ecology valve portion controlled by the fuel pressure differential between the fuel source and the flow restricting inlet. The ecology valve portion includes a housing with a movable piston disposed therein. The piston defines, in conjunction with the housing, a variable volume chamber for withdrawing fuel from the engine intake manifolds. When the engine is de-energized, the piston moves from a first position toward a second position thereby purging the manifolds of fuel.

US Patent:

62828827, Sep 4, 2001

Filed:

Oct 14, 1999

Appl. No.:

9/418053

Inventors:

John E. Dudd - Three Rivers MI
Dennis G. Demers - Mishawaka IN

Assignee:

AlliedSignal Inc. - Morristown NJ

International Classification:

F02C 928

US Classification:

60 39141

Abstract:

A turbine engine (49) fuel delivery system of the type including a pneumatic governor has an electronic governor and an engine excess stress avoidance feature which disable the pneumatic governor (70) so long as the engine speed exceeds a prescribed value and an electronic control unit (45) continues to function properly. The system transfers governing responsibility to the electronic control unit (45) which controls a torque motor and solenoid valve fuel diversion line (22). The system monitors an engine (49) operating parameter such as gas generator speed (37), power turbine speed, engine output torque, or engine temperature and further diminishes fuel flow to the engine (49) when the monitored parameter exceeds a threshold value. The system resumes normal speed governoring flow when that parameter returns to an acceptable level The system also senses rotor blade pitch to reduce rotor droop and increases fuel flow to the engine (49) when the pitch (44) increases, and decreasing the fuel flow to the engine (49) when the rotor blade pitch (44) decreases.