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The Engine Driven Fuel Pump is part of the Airplane fuel system, one of the most important elements of the fuel system, like to any other internal combustion engine equipped vehicle. There are two types of engine driven fuel pumps used in aircraft jet engines, the Gear type Constant Displacement fuel pumps,and the Piston type Variable ...
Some older reciprocating engine aircraft have been equipped with hand-operated fuel pumps. They are used to back up the engine-driven pump and to transfer fuel from tank to tank. The wobble pumps, as they are known, are double-acting pumps that deliver fuel with each stroke of the pump handle.
The engine-driven fuel pump must be capable of delivering the maximum needed flow at appropriate pressure to obtain satisfactory nozzle spray and accurate fuel regulation. These engine driven fuel pumps may be divided into two distinct system categories: Constant displacement ; Nonconstant displacement ; Their use depends on where in the engine ...
Finally, the fuel reaches the heart of the fuel pump system - the engine driven pump. This mechanical engine driven pump is bolted directly to an accessory pad on the engine crankcase from whence it delivers the fuel under pressure to the fuel injector or carburetor.
Other than aircraft with gravity-feed fuel systems, all aircraft have at least one fuel pump to deliver clean fuel under pressure to the fuel metering device for each engine. Engine-driven pumps are the primary delivery device.
Since the 1960s, Airborne has designed and manufactured motor driven fuel pumps, incorporating the reliability and flexibility necessary to keep pace with performance demands from the general aviation and aerospace industries.
pump to force fuel through the other. In order to assure that both pumps are functioning, note the fuel pressure produced by the electric pump before start-ing the engine, and then, with the engine running, turn the electric pump off and note the pressure that is produced by the engine driven pump. The electric pump is used to supply fuel pres-
