Engine driven pumps are used when there is no source of electricity available to power the pump's motor, or in cases where the mobility of the pump is a concern. ... Engine driven pumps harness their power from a portable running engine, which often uses diesel or petrol as a fuel.

What is the difference between a boost pump and an engine driven pump?

Boost pumps provide a positive flow of fuel under pressure to the engine for starting and serve as an emergency backup in the event an engine-driven pump should fail. ... Boost pumps prevent vapor locks by holding pressure on the fuel in the line to the engine-driven pump.

Where is engine driven pump located?

In an overview of the airplane fuel system, the engine driven fuel pump is located downstream of the electrically operated centrifugal type fuel boost pump, located in the fuel tank providing positive fuel pressure to the engine driven fuel pump, and upstream of the pump is the fuel metering unit, the fuel flow meter, ...