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| Number | Title | Issue Date |
| 7369932 | System and method for turbine engine fault detection using discrete event system modeling A system and method is provided for fault detection in a turbine engine. The fault detection system and method uses discrete event system modeling to provide improved fault diagnosis and prognosis. The fault detection system and method receives sensor taken at multi... | 05/06/2008 |
| 7347050 | Fuel metering unit A fuel metering unit 10 for an aircraft. The unit 10 having an inlet leg 12 within which fuel flows, which leg 12 splits into controlling legs 18, 20 which rejoin downstream to form an outlet leg 30. Shut off valves 28, 3... | 03/25/2008 |
| 7331169 | Control logic for fuel controls on APUs Conventional auxiliary power units (APUs) may experience over-temperature shutdowns when attempting to start them at high altitudes. Further, such conventional APUs may also experience overspeed conditions when a generator load is removed during on-speed operations.... | 02/19/2008 |
| 7279800 | Waste oil electrical generation systems An on-site electrical power generation system utilizing environmentally hazardous waste oils as a combustible fuel. The disclosed invention utilizes environmentally hazardous waste oils generated by one or more on-site processes, such as, for example, by the mainten... | 10/09/2007 |
| 7181916 | Method for operating a reduced center burner in multi-burner combustor A method for combustion in a combustor in a gas turbine including: fueling the center fuel nozzle with a fuel-rich mixture of gaseous fuel and air and fueling the outer fuel nozzles with a fuel-lean mixture of fuel and air; igniting the fuel-rich mixture injected by... | 02/27/2007 |
| 7168254 | Control logic for fuel controls on APUs Conventional auxiliary power units (APUs) may experience over-temperature shutdowns when attempting to start them at high altitudes. Further, such conventional APUs may also experience overspeed conditions when a generator load is removed during on-speed operations.... | 01/30/2007 |
| 7162875 | Method and system for controlling fuel supply in a combustion turbine engine In order to regulate fuel flow to the combustor (36) of the combustion turbine engine (10) having a primary combustion zone (64) and at least one further combustion zone, the temperature of the inlet and outlet of the combustor (36) are d... | 01/16/2007 |
| 7143584 | Gas turbine apparatus A gas turbine apparatus is provided which comprises a turbine, a combustor for burning a mixture of air and fuel and providing the turbine with a combustion gas to drive it, a generator connected to the turbine to receive rotational force therefrom to generate elect... | 12/05/2006 |
| 7111460 | Metering fuel pump A device and method for controlling the flow of a gaseous fuel from a fuel supply to a pressurized combustion chamber. A fuel pump is included in the gas train from supply to chamber. The fuel pump increases the pressure of the gas to allow efficient injection into ... | 09/26/2006 |
| 7078825 | Microturbine engine system having stand-alone and grid-parallel operating modes A microturbine engine that includes a compressor that is operable to provide a flow of compressed air. The compressed air flows through a recuperator where it is preheated before delivery to a combustor. The preheated compressed air mixes with a fuel and is combuste... | 07/18/2006 |
| 7045913 | Microturbine engine system A microturbine engine that includes a compressor that is operable to provide a flow of compressed air. The compressed air flows through a recuperator where it is preheated before delivery to a combustor. The preheated compressed air mixes with a fuel and is combuste... | 05/16/2006 |
| 6993396 | System for determining the health of process control feedback loops according to performance assessment criteria A method for calculating the health of a process control loop based on multiple key assessments of the loop's performance. The method uses the concepts of baselines and thresholds. The typical calculation of loop health is the average of the Percent Towards Threshol... | 01/31/2006 |
| 6988368 | Method of engine starting in a gas turbine engine A method of engine starting in a gas turbine engine comprises rotating the engine to provide an air flow into a combustor of the engine and injecting fuel into the combustor at a varying rate until the engine is lighted-off. The varying rate of the fuel flow is a fu... | 01/24/2006 |
| 6960900 | Method and apparatus for starting a gas turbine using a polyphase electric power generator A method to start a combined unit gas turbine and electrical unit having a static start drive including the steps of: applying a variable frequency voltage from the static start drive to a winding of the generator to accelerate the combined unit to a turbine self-su... | 11/01/2005 |
| 6834226 | Multiple control loop acceleration of turboalternator after reaching self-sustaining speed previous to reaching synchronous speed A method of operating a turboalternator when the turbine engine speed is between synchronous speed and self-sustaining speed. ... | 12/21/2004 |
| 6810677 | Method for gas turbine light-off A method for gas turbine light-off that utilizes a fixed or secondary fuel line that provides a substantially constant flow of fuel to the combustor primarily upon light-off. ... | 11/02/2004 |
| 6810676 | Method of engine starting in a gas turbine engine A method of engine starting in a gas turbine engine comprises rotating the engine to provide an air flow into a combustor of the engine and injecting fuel into the combustor at a varying rate until the engine is lighted-off. The varying rate of the fuel flow is a fu... | 11/02/2004 |
| 6792760 | Method for operating a turbine A method of operating a turbine arranged in a compressed air energy storage power generation plant comprises an open-loop control of an air mass flow applied within a lower turbine speed range and a closed-loop control of the turbine speed within a higher turbine sp... | 09/21/2004 |
| 6766647 | Method for ignition and start up of a turbogenerator A method for ignition and start up of a gas turbine engine in which the fuel flow is supplied to the combustor at a substantially constant rate for ignition and the gas turbine engine is ramped up at a preset acceleration rate to a speed to provide a supply of combu... | 07/27/2004 |
| 6484510 | Fuel divider and ecology system for a gas turbine engine A fuel control system for supplying metered quantities of fuel from a fuel supply (11), through a fuel pump (13), a metering valve (15) and a pressurizing valve (17) to a plurality of engine fuel manifolds (31a, 31b, 33) includes an ecology valve (43) for... | 11/26/2002 |
| 6470688 | Apparatus for the rapid startup and rapid increase in output of a gas turbine plant The startup time or the output gradient of a gas turbine plant during startup are limited by the maximum permissible temperature gradient. The increase in the fuel mass flow supplied, if appropriate in combination with the combustion-air mass flow supplie... | 10/29/2002 |
| 6378285 | Method for rapid startup and increase in output of a gas turbine plant The startup time or the output gradient of a gas turbine plant during startup are limited by the maximum permissible temperature gradient. The increase in the fuel mass flow supplied, if appropriate in combination with the combustion-air mass flow supplie... | 04/30/2002 |
| 6370880 | Fuel gas moisturization control system for start-up, high load operation and shutdown Transient conditions, such as startup, shutdown, and contingencies, in gas turbine power plants are difficult to manage; oftentimes in designs employing a fuel moisturization system, such conditions require the use of backup fuel or a temporary fuel strea... | 04/16/2002 |
| 6357219 | Turbine engine fuel control system A turbine engine fuel delivery system (10) and method has, in addition to the conventional fuel bypass (20) for diverting fuel exiting a fuel control (17) away from the engine (49) and back to a fuel pump (15) to maintain a relatively constant pressure di... | 03/19/2002 |
| 6282882 | Turbine engine control system providing electronic power turbine governor and temperature/torque limiting 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... | 09/04/2001 |
| 6182438 | Method and apparatus for starting a gas turbine engine A method of starting gas turbine engine (17) having a variable-speed motor-driven pump (13) operatively arranged to supply a source of fuel to the engine through at least one combustor nozzle (19) when the engine is operating normally, includes the steps ... | 02/06/2001 |
| 6018941 | Electric starter system for turbine aircraft engines Turbine aircraft engine starter systems and controllers for use therewith, and methods of starting turbine aircraft engines are described. A starter is operably connected with an aircraft engine and configured to initiate an engine start cycle which inclu... | 02/01/2000 |
| 5966925 | Gas turbine power plant control for starting and stopping A method of controlling a gas turbine electric power plant comprises the steps of: prescribing the relationship between a time elapsed after a predetermined reference time (e.g., ignition time) in a predetermined process (e.g., the starting process) and a... | 10/19/1999 |
| 5927064 | Start, shutoff and overspeed system for gas turbine engine A start, shutoff and overspeed system includes a shutoff valve which permits the flow of fuel to an engine when the pressure of the main flow of fuel received from the fuel pump at first end of the shutoff valve exceeds a bias pressure at a second end of ... | 07/27/1999 |
| 5907949 | Starting fuel control method for a turbine engine A method for reliably starting a gas turbine engine includes commanding a rapid transient enrichment of the fuel quantity delivered to the engine combustion chamber, maintaining the fuel quantity at the enriched level while operating the engine's ignition... | 06/01/1999 |
| 5718111 | Fuzzy start logic for jet engines A control apparatus and method for controlling the start-up of a turbine engine, including a compressor and a fuel control system, uses a sensor for sensing a first parameter associated with the start-up, generally the exit temperature of the turbine engi... | 02/17/1998 |
| 5682737 | Method for starting up a combination gas and steam power plant In a method for starting up a combination plant designed as a single-shaft plant with a common shafting (10) and essentially consisting of a compressor (1), a combustion chamber (2), a turbine (3), a steam turbine (5), a generator (6) and a fuel compresso... | 11/04/1997 |
| 5488823 | Turbocharger-based bleed-air driven fuel gas booster system and method A method and system for increasing the pressure of gaseous fuel delivered to a fuel system of a gas turbine engine. A portion of pressurized gas or compressed air is discharged from a high-pressure section of the gas turbine engine and is communicated to ... | 02/06/1996 |
| 5463865 | Starter air valve position pressure transducer A pressure transducer adapted to measure the position of a pneumatic valve by measuring pressure immediately downstream of a valve restrictor (e.g. a valve plate or butterfly plate) and comparing that pressure with a pressure measured at a second measurem... | 11/07/1995 |
| 5442907 | Bootstrap re-ignition system for aircraft jet engine A system for re-igniting an aircraft gas turbine jet engine which has flamed out, using a plurality of electromagnetic wave powered plasma plume igniters in an intermittent mode to avoid compressor stall, and bootstrap the engine back up to normal operati... | 08/22/1995 |
| 5369948 | Method of operating a gas turbine and a process and apparatus for starting a gas turbine Method of operating a gas turbine and a process and apparatus for starting a gas turbine. In this apparatus with a startup controller for a gas turbine, the amount of fuel injected by controlled dosing pumps is determined, whereby the amount of fuel injec... | 12/06/1994 |
| 5345757 | Combustor apparatus for use in a gas turbine engine A combustor apparatus is provided for a gas turbine engine including a circumferential ring of injectors. A fuel manifold provides a source of fuel for the injectors. The combustor apparatus includes a plurality of first fuel flow paths between the manifo... | 09/13/1994 |
| 5274996 | Closed loop fuel control system A fuel control system for accurately controlling the fuel flow rate to a gas turbine engine during the initial stages of startup is provided. The fuel control system has a novel, closed control loop that measures the actual fuel flow rate to the primary n... | 01/04/1994 |
| 5212943 | Reduced thermal stress turbine starting strategy A gas turbine engine starting strategy is disclosed which minimizes thermal stress utilizing a total fuel demand based on summing two components. The first component is a prescheduled quantity of fuel near the low limit of predicted fuel requirements as a... | 05/25/1993 |
| 5184457 | Valve assembly and method A valve assembly is used to start an engine with a minimum of electrical power. The valve assembly provides a low initial fuel flow rate to the engine. Upon initiation of combustion in an engine combustion chamber, the resulting increase in fluid pressure... | 02/09/1993 |
