1-11 Flashcards
Purpose of engine fuel system is to
provide means of supplying sufficient fuel to meet engines demand
System requirements
Deliver fuel to combustion section
Protect engine against damage due to speed, temp, and pressure
Engine-Drien fuel pump purpose
provide continuous supply of fuel
Engine driven fuel pump is a _____type pump.
Gear. (most generally used)
It is mounted on an driven by
accessory gearbox
Boost element is an impeller that will
increase fuel pressure above inlet pressure, deaerate fuel, circulate fuel through fuel deicing heater.
Fuel Heater prevents
ice from forming
Filter assembly removes
impurities from fuel before fuel enters pressure stage of pump
Micro Filter type is used to
remove foreign matter measuring 10 - 25 microns
Wafer type
withstand high pressure
plain screen mesg
when filtering isnt critical
filter bypass valve will ensure
flow of fuel to pump gear stage diring event of clogg
Pump relief valve will
limit pump discharge pressure from the gear stage to protect fuel control from excessive pressures
fuel control purpose
regulates fuel flow to maintain satisfactory engine performance
fuel control is mounted on
accessory gearbox
these variable are sensed by fuel control:
Power Level Engine RPM Burner pressure Compressor inlet temp outside air temo barometric pressure
fuel flow transmitter provides
signal to the flight station/cockpit. indicates fuel flow in PPH
fuel flow transmitter located on
engine
fuel/oil cooler(heat exchanger)
oil enters cooler and heats upfuel while fuel cools oil
fuel manifolds are used to
distribute fuel from pressurization and dump valve to fuel nozzles
fuel nozzle purpose
supply atomized fuel to combustion chambers
located
exterior or inside diffuser case
