Fuel pump assembly
AssigneeDelphi International Operations Luxemboug S.A.R.L.
InventorPeter Alban George Collingborn
Life of this patent
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Abstract
A fuel pump assembly for a fuel injection system comprises a drive shaft, at least two pump heads each of which is axially displaced along the drive shaft, each pump head having a respective plunger for pressurising fuel within a respective pump chamber, and at least two cams provided on the drive shaft, each of which is associated with a respective one of the pump heads. Adjacent pump heads are offset angularly from one another by an amount sufficient to allow a region of overlap, in an axial direction along the drive shaft, between the adjacent pump heads.
Claims19
A fuel pump assembly for a fuel injection system, the fuel pump assembly comprising;
- a drive shaft, at least two pump heads each of which is axially displaced along the drive shaft, each pump head having a respective plunger for pressurising fuel within a respective pump chamber, and at least two cams provided on the drive shaft, each of which is associated with a respective one of the pump heads, wherein adjacent pump heads are offset angularly from one another by an amount sufficient to allow a region of overlap, in an axial direction along the drive shaft, between said adjacent pump heads, and wherein none of the plungers lie in the same axial plane as any other of the plungers.
A fuel pump assembly for a fuel injection system, the fuel pump assembly comprising;
- a drive shaft, at least two pump heads each of which is axially displaced along the drive shaft, each pump head having a respective plunger for pressurising fuel within a respective pump chamber, wherein adjacent pump heads are axially displaced and offset angularly from one another by an amount sufficient to allow a region of overlap, in an axial direction along the drive shaft, between said adjacent pump heads, the region of overlap being less than the maximum width of the adjacent pump heads, and wherein none of the plungers lie in the same axial plane as any other of the plungers, and at least two cams provided on the drive shaft, each of which is associated with a respective one of the pump heads, and wherein the angular offset between the respective cams is selected so as to achieve evenly spaced pumping events.
Dependencies are inferred from the claim text.