How is fuel flow varied in a variable displacement pressure type pump?
- Alter the camplate angle
- Remote servo pressure
- Direct cable to camplate
Explanation
A variable-displacement (axial-piston) fuel pump varies its delivery by changing the angle of the camplate/swashplate, which alters the piston stroke and therefore the volume pumped per revolution. Remote servo pressure may position the camplate, but the quantity delivered is set by the camplate angle itself rather than by a direct cable.
rajib asking:
how many types of pumps are there? and what about camplate angle?
Community Comments (4)
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dimky Posts: 514 05.02.2013 / 14:59
Check this: http://www.youtube.com/watch?v=2mh902AP7Yw
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rajib Posts: 8 06.02.2013 / 17:31
thanks but can you give some more reference, so i can quench my thirst, thanks in advance :)
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dimky Posts: 514 07.02.2013 / 18:15
Unfortunately I don't have any reference at the moment.
In my opinion working principle is very simple:
more camplate angle -> more piston displacement -> more total fue flow.
In my opinion working principle is very simple:
more camplate angle -> more piston displacement -> more total fue flow.
Z
zbd Posts: 3 26.02.2013 / 03:48
There are two basic types of fuel pump, Plunger type pump (variable displacement) and Gear type fuel pump. For Variable displacement type, the inclination of the camplate or swashplate and the movement of the rotor imparts a reciprocating motion to the plungers thus producing a pumping action. The stroke of the plungers is determined by the angle of inclination of the camplate.
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