Self-regulating fuel supply pump

Details Self-regulating fuel supply pump Self-regulating fuel supply pump

F - Mech Eng,Light,Heat,Weapons

02

M

F02M 37/02 (2006.01) F02M 37/04 (2006.01) F02M 59/20 (2006.01)

Patent

CA 2184434

A self-regulating fuel supply pump for supplying fuel from a fuel tank to a fuel rail of an engine includes a housing having an inlet, an outlet, an inlet pressure chamber, a vane surplus chamber, a pumping chamber, an outlet pressure chamber, an inlet pressure passage, and an outlet pressure passage; a rotor drive shaft; a pressure regulation spring; a reference pressure piston; anoutlet pressure piston; a vane seal; a cylindrical rotor; and vanes slip-mounted in the rotor. Fuel is drawn into the inlet by the rotor and vanes rotating on the rotor drive shaft within the pumping chamber and compressed by reducing vane width via the eccentric orientation of the rotor in the pumping chamber. Pressure regulation spring combines with reference pressure piston and outlet pressure piston to vary vane length according to the pressure differential between inlet pressure chamber and outlet pressure chamber, as provided by inlet pressure passage and outlet pressure passage. Surplus vane length is separated from pumping chamber by vane seal, through which rotor and vanes may slide.

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