Pump housing with relief cut for lobe clearance
AssigneeCummins Inc.
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;
- and
- a main bore portion fluidly coupled with the at least one tappet housing portion, the main bore portion configured to receive a camshaft,
- 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.
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;
- and
- a main bore portion fluidly coupled with the at least one tappet housing portion, the main bore portion configured to receive the camshaft,
- 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.
An engine comprising:
- a fuel pump system 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;
- and
- a main bore portion fluidly coupled with the at least one tappet housing portion, the main bore portion configured to receive the camshaft,
- 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;
- 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.