United Technologies Corporation

Matthew J Schryver

Richard P Meisner

Robert L Gukeisen

Peter Gerard Smith

Wayne R Spock

Ronald S Walther

Timothy M Morris

Edward T Hagaman

Peter L Jalbert

John A Leogrande

C Bruce Wood

Bruce C Wood

Peter Gerald Smith

A system for generating accessory power from a gas turbine engine is provided by the present invention. The system includes an electronic control device for monitoring at least one parameter which provides information about an incipient change in power demand, a control valve operated by the control device for supplying bleed air from the engine during a transient state in response to the at least one monitored parameter, and a pneumatically operated device for receiving the bleed air and for generating power to operate equipment onboard an aircraft. The pneumatically operated device may be an air turbine or a pneumatically integrated generator.

Hybrid engine accessory power system

A system and method for determining thermal growth of motor or engine parts to thereupon control the clearance of motor or engine fan blades is disclosed herein. In addition, a system and method for monitoring the health of a turbine engine, its components and sub-components is also described herein. The system(s) and method(s) described herein permit continuous monitoring during the life of the engine for radial clearances and blade and rotor vibration problems, which will assist in correcting and retaining performance for a longer on-wing time in operation. In addition, inconsistent engine-to-engine performance variations due to component tolerances, engine operation characteristics, and operation during extremes in ambient temperatures can be eliminated or significantly minimized when employing the system(s) and method(s) described herein.

Systems and methods for monitoring thermal growth and controlling clearances, and maintaining health of turbo machinery applications

A method and apparatus is disclosed for synthesizing a fuel flow and a metering valve position used in a fuel control system of a turbomachine. Various construction details have been developed which provide a method to manipulate conventional turbine engine parameters to generate a synthesized fuel flow signal and metering valve position signal. In one embodiment, a synthesis means includes means to sense temperature, pressure and high pressure shaft speed, and means to manipulate the sensed signals to generate a synthesized fuel flow. A function generator responds to the synthesized fuel flow signal to generate a synthesized metering valve position signal.

Synthesized fuel flow rate and metering valve position

An apparatus is disclosed for a fuel control system of a turbine engine powerplant. Various construction details have been developed which provide means to generate a backup command current for controlling the fuel flow rate to the turbine engine powerplant. In one embodiment, a means to generate a backup command current includes means to convert a fuel flow derivative to a backup command current using known hardware characteristics and an estimated null bias signal. The backup command current is input to a switch along with a command current generated by comparing a reference signal to a feedback signal from a metering valve. The switch responds to means for failure recognition which detects failures in the sensing of the feedback signal. The switch responds to a failure of the feedback signal by inputting the backup command current to a torque motor for controlling a metering valve position.

Fuel control system with fuel metering valve fault accommodation

Growing community of inventors

Wethersfield, CT, United States of America

Matthew J Schryver