T-45A UJPT, E2-C2, ADV, & IUT Eng-02
Engine
i)
Enabled when altitude
decreases through 7,700
+/- 500 ft
ii)
Disabled when altitude
increases through 9,500
+/- 300 ft
iii)
ACCEL caution light
illuminates if solenoid not
in commanded position
(b) Acceleration switch dampens
Overlay 6
throttle valve response to
Acceleration Switch
rapid throttle movements
(c) Servo pressure control
Overlay 7
maintains constant pressure
Servo Pressure Control
drop across throttle valve,
compensating for changes in
airspeed and altitude
(d) Solenoid (fuel trim): trims
Overlay 8
basic fuel flow in response to
Solenoid (Fuel Trim)
engine control amplifier (ECA)
inputs
(6) ECA: located in lower equipment
Overlay 9
bay, trims fuel flow to maintain
EGT and N1 rpm within limits
(a) Two independent control
modules (lanes) which adjust
fuel trim in conjunction with
fuel trim solenoid
ECA
i)
Each lane operates
independently, with only
one in control
(8-03) Original
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