Pump housing with relief cut for lobe clearance
OwnerRoberto M. Munoz, Amanda Baker +2inventors
InventorsRoberto M. Munoz, Amanda Baker, Yip Kwok, Thomas M. Yeager
Life of this patent
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Abstract
The disclosure relates to fuel pump housings and fuel pump systems incorporating the same. The fuel pump housing includes at least one tappet housing portion configured to receive at least one tappet assembly and a main bore portion fluidly coupled with the at least one tappet housing portion such that the main bore receives a camshaft. The main bore includes an uncut portion and at least one relief cut portion proximal to the at least one tappet housing portion. The uncut portion defines a first centerline, and the relief cut portion defines a second centerline offset from the first centerline.
Claims20
A fuel pump housing comprising:
- at least one tappet housing portion configured to receive at least one tappet assembly;
- a main bore portion fluidly coupled with the at least one tappet housing portion, the main bore portion configured to receive a camshaft;
- and
- side bearing portions positioned adjacent to the main bore portion,
- wherein the main bore portion comprises an uncut portion and at least one relief cut portion proximal to the at least one tappet housing portion, the uncut portion defining a first centerline and the relief cut portion defining a second centerline offset from the first centerline, and the side bearing portions share a central axis with the second centerline.
A fuel pump system for an engine comprising:
- at least one tappet assembly;
- a camshaft operatively coupled with the at least one tappet assembly;
- and
- a fuel pump housing comprising:
- at least one tappet housing portion configured to receive the at least one tappet assembly;
- a main bore portion fluidly coupled with the at least one tappet housing portion, the main bore portion configured to receive the camshaft;
- and
- side bearing portions positioned adjacent to the main bore portion,
- wherein the main bore portion comprises an uncut portion and at least one relief cut portion proximal to the at least one tappet housing portion, the uncut portion defining a first centerline and the relief cut portion defining a second centerline offset from the first centerline, and the side bearing portions share a central axis with the second centerline.
An engine comprising:
- a fuel pump system comprising:
- a plurality of tappet assemblies;
- a camshaft operatively coupled with the at least one tappet assembly;
- and
- a fuel pump housing comprising:
- a plurality of tappet housing portions configured to receive respective ones of the plurality of tappet assemblies;
- and
- a main bore portion fluidly coupled with the plurality of tappet housing portions, the main bore portion configured to receive the camshaft,
- wherein the main bore portion comprises an uncut portion and a single relief cut portion proximal to the at least one tappet housing portion, the uncut portion defining a first centerline and the relief cut portion defining a second centerline offset from the first centerline, the relief cut portion having a length along the second centerline that spans across at least two of the plurality of tappet housing portions that are spaced from one another along the second centerline;
- a plurality of pistons operatively coupled with the fuel pump system;
- and
- a crankshaft operatively coupled with the plurality of pistons.
Dependencies are inferred from the claim text.