AIRPLANE
OPERATIONS
MANUAL
POWERPLANT
REVISION 41
2-10-50
Page
1
Code
01
Copyright © by Embraer. Refer to cover page for details.
ENGINE OPERATION
GENERAL
The Rolls-Royce AE 3007 engine uses an electronic control system
based on two Full Authority Digital Electronic Controls (FADECs) that
control the engine. These FADECs interface with the engine, airframe,
and flight deck. A complete description of the engine control system
was presented in the previous chapter.
ENGINE CONTROL
The engine control system controls the operation of the engine
throughout its operating envelope. The system modulates the fuel flow
rate to the engine and the position of the variable geometry vanes
(CVG) in response to inputs from the airplane’s sensors and
measurements of engine operating conditions. The engine control
system will not command a fuel flow that would result in exceeding
rotor speed or temperature operating limits.
The engine control system is designed in such a manner that a single
electrical failure will not cause significant thrust changes, result in an
uncommanded engine shutdown or prevent a commanded engine
shutdown. In case of loss of both FADECs, the engine control system
will shut off fuel flow and move the CVGs to the closed position.
The engine control system performs two categories of functions: thrust
management and engine control. Thrust management logic interfaces
with the airframe and schedules a corrected thrust based on air data
and cockpit inputs. The fan speed request is passed to the engine
control logic, which controls the engine fuel flow and Compressor
Variable Geometry (CVG) in response to the measured parameters in
order to attain the required engine response.
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