| Patent application number | Description | Published |
|---|
| 20080196383 | Airframe mounted electric motor driven lubrication pump control deoil system - A system for controlling lubricant displacement from a machine during turbomachine shutdown sequence includes a motor, a pump, a control valve, and a motor control unit. The motor is selectively energized from a power bus to rotate at a rotational speed and supply a drive force to the pump. The pump, in response to the drive force, draws fluid from a fluid and supplies the fluid to the machine. The control valve is movable between at least a first position, in which the control valve fluidly communicates the pump with a lubrication fluid source, and a second position, in which the control valve fluidly communicates the pump with a gaseous fluid source. During the shutdown sequence, the motor control unit controllably energizes the motor from the power bus to thereby control its rotational speed in accordance with a schedule that will displace at least a substantial volume of lubricant in the rotating machine with fluid from the gaseous fluid source. | 08-21-2008 |
| 20090078508 | ELECTRIC MOTOR DRIVEN LUBRICATION SUPPLY SYSTEM SHUTDOWN SYSTEM AND METHOD - A system and method for controlling lubricant displacement from a lubrication system and a rotating machine includes supplying a gaseous fluid to the lubrication supply system to displace the lubricant. The gaseous fluid is preferentially directed through a first section of the lubrication supply system and to the rotating machine, and is at least inhibited from flowing through a second section of the lubrication supply system. As a result, the gaseous fluid displaces the lubricant in the rotating machine and in the first section of the lubrication supply system, while the second section of the lubrication supply system remains at least substantially full of lubricant. | 03-26-2009 |
| 20090099750 | Manuever-based aircraft gas turbine engine speed control system and method - A system and method for controlling the rotational speed of a gas turbine engine in an aircraft includes appropriate devices and processes for determining a pressure of lubricant supplied to the turbine engine, and for determining a maneuver state of the aircraft. The rotational speed of the gas turbine engine is controlled based at least partially on the determined pressure and the determined maneuver state. Thus, if the aircraft is in a maneuver state that may cause a reduction or loss of lubricant to the gas turbine engine, the rotational speed of the gas turbine engine can be reduced to a magnitude sufficient to increase turbomachine tolerance to the reduced or no lubricant flow. | 04-16-2009 |
| 20090299535 | ELECTRIC MOTOR DRIVEN LUBRICATION PUMP AND LUBRICATION SYSTEM PROGNOSTIC AND HEALTH MANAGEMENT SYSTEM AND METHOD - An aircraft lubrication supply system health and prognostic system and method includes supplying a pressure signal representative of lubricant pressure, a temperature signal representative of lubricant temperature, a speed signal representative of motor rotational speed, and one or more aircraft condition signals representative of one or more aircraft operating conditions to a system characterization model of at least portions of the lubrication supply system. Simulation response data representative of at least the pressure signal, the temperature signal, and the speed signal are generated, and lubrication supply system health is determined based, at least in part, on the simulation response data. | 12-03-2009 |
| 20100023169 | Electric Motor Driven Lubrication Pump Control System And Method That Accomodates Turbomachine Windmill Operation - A system and method are provided to selectively control lubricant supply flow to one or more rotating machines in an aircraft when the rotating machines are windmilling. A controller determines if the rotating machines are windmilling. When the rotating machines are windmilling, the controller at least selectively energizes an electric motor driven lubrication pump, to thereby supply lubricant to the windmilling turbomachine. | 01-28-2010 |
