M15.11 Flashcards
What are the primary and secondary fuel systems?
Primary stores the fuel and secondary is on the engine
What is the purpose of the secondary fuel system?
Supply fuel to the combustion chamber and control quantity of fuel for engine operation
What 2 subsystems can fuel systems be split into?
Fuel distribution and fuel control
What PSI does the low pressure fuel pump pressure up to?
175
At max engine speed the high pressure pump can increase fuel pressure to what PSI?
900
At what PSI does the over pressure relief valve open?
1250
Does the fuel pump supply the exact amount needed or more than needed?
More than needed
Why type of component is a fuel control unit on a turbofan engine?
Hydro mechanical component
What are the 2 fuel control units?
Speed governed, constant thrust
Where do temperature signals come from?
Hydro mechanical temperature sensors
What do pressure sensors convert?
Convert pressure signals into mechanical signals
What do hydromechanical fuel control units use for their signals?
Hydraulic, mechanical and pneumatic signals
What can fuel control unit be separated into?
Fuel metering and control
What does FADEC stand for?
Full authority digital engine control
What does ECU stand for?
Electronic control unit
