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US 5,345,386 AGranted
Aircraft engine management system
AssigneeROLLS-ROYCE plc
InventorsStuart I. Mullen, Leslie R. Summerfield
Life of this patent
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Abstract
An aircraft jet engine management system has a digital electronic control unit (DECU) which measures turbine blade temperature (TBT) and controls the engine in such a way as not normally to exceed a TBT normal datum, there being an over-ride facility which responds to special circumstances as represented by one or more pilot-independent inputs to the DECU to allow temporary over-ride of the TBT limitation program, at least cut-off of the over-ride being pilot-independent.
Claims9
An aircraft jet engine management system comprising a digital electronic control unit (DECU) having a pilot demand input;
- an input from a critical engine parameter sensor;
- one or more additional pilot-independent inputs;
- an output for controlling fuel supply to the engine;
- a memory and a microprocessor, the DECU being programmed with a sensed parameter limitation program to respond to the pilot demand input to control fuel supply to the engine and thus adjust power subject to the sensed parameter not exceeding a reference value which has a normal datum level, wherein there is an over-ride facility responsive to one or more of the said additional pilot-independent inputs to invoke (a) over-ride and (b) resumption of the parameter limitation program subject to special circumstances represented by the additional inputs, at least the resumption (b) of the parameter limitation program being independent of the pilot.
1 more element
Dependencies are inferred from the claim text.