FUEL PUMP ASSEMBLY
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United States of America Patent
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Issued Date -
Oct 15, 2015
app pub date -
Apr 10, 2013
filing date -
Apr 25, 2012
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Abstract
A fuel pump assembly for an internal combustion engine comprising at least one engine cylinder into which fuel is injected, each cylinder having an associated cylinder piston which reciprocates within the associated cylinder in use. The fuel pump assembly comprises a plurality of unit pumps each having a pumping plunger for pressurising fuel within an associated pump chamber; and a crank shaft which is driven rotationally by means of the or each cylinder piston. The crank shaft carries a cam arranged to drive the pumping plungers of the unit pumps and further carries at least one crank assembly which is coupled to a respective one of the cylinder pistons, in use. The plurality of unit pumps are radially spaced around the crank shaft and located at the same axial position along the crank shaft so that each of the unit pumps is driven, in use, by the same cam.
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