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AssigneeUnited Technologies Corporation
InventorsWayne Hurwitz, William J. McVey
Estimating the term…
A turbofan engine control system is provided for managing a low pressure compressor operating line. The engine includes a low spool having a low pressure compressor housed in a core nacelle. A turbofan is coupled to the low spool. A fan nacelle surrounds the turbofan and core nacelle and provides a bypass flow path having a nozzle exit area. A controller is programmed to effectively change the nozzle exit area in response to an undesired low pressure compressor stability margin which can result in a stall or surge condition. In one example, the physical nozzle exit area is decreased at the undesired stability condition occurring during engine deceleration. A low pressure compressor pressure ratio, low spool speed and throttle position are monitored to determine the undesired stability margin.
1-16. (canceled)
A turbofan engine control system for managing a low pressure compressor operating line comprising:
The turbofan engine control system according to claim 23, comprising a speed sensor in communication with the controller, the controller programmed to determine the undesired stability margin from the speed sensor.
A turbofan engine control system for managing a low pressure compressor operating line comprising:
A method of managing a turbofan engine low pressure compressor operating line, the method comprising the steps of:
Dependencies are inferred from the claim text.