Fuel pump assembly
AssigneeCummins-Scania HPCR System, LLC
InventorsDonald J. Benson, Eric A. Benham, Richard E. Duncan
Life of this patent
Estimating the term…
Abstract
A fuel pump assembly includes a fuel pump. The fuel pump includes a camshaft having a cam lobe. The camshaft is configured to rotate. The fuel pump includes a first cam roller and a second cam roller disposed about an outer surface of the cam lobe, a first pumping assembly configured to interact with the first cam roller, and a second pumping assembly configured to interact with the second cam roller. The second pumping assembly is offset from the first pumping assembly. The fuel pump further includes a housing configured to support the camshaft, the first cam roller, the second cam roller, the first pumping assembly, and the second pumping assembly.
Claims20
A fuel pump assembly for an engine, comprising:
- a fuel pump comprising:
- a camshaft having a cam lobe, the camshaft configured to rotate;
- a first cam roller and a second cam roller disposed about an outer surface of the cam lobe;
- a first pumping assembly configured to interact with the first cam roller, the first pumping assembly including a first plunger and a first plunger foot, the first plunger foot in confronting relation with the first cam roller such that the first plunger is configured to reciprocate in response to rotation of the cam lobe with the camshaft;
- and
- a second pumping assembly configured to interact with the second cam roller, wherein the second pumping assembly is offset from the first pumping assembly
- wherein one of the first plunger foot and the first cam roller is configured with a convex geometric configuration, and the other of the first plunger foot and the first cam roller is configured with a concave geometric configuration, corresponding with the convex geometric configuration of the one of the first plunger foot and the first cam roller.
A fuel pump assembly for an engine, comprising:
- a fuel pump comprising:
- a camshaft having a cam lobe, the camshaft configured to rotate;
- a first cam roller and a second cam roller disposed about an outer surface of the cam lobe;
- a first pumping assembly configured to interact with the first cam roller, the first pumping assembly including a first plunger and a first plunger foot, the first plunger foot in confronting relation with the first cam roller such that the first plunger is configured to reciprocate in response to rotation of the cam lobe with the camshaft;
- and
- a second pumping assembly configured to interact with the second cam roller, wherein the second pumping assembly is offset from the first pumping assembly, the second pumping assembly including a second plunger and a second plunger foot, the second plunger foot in confronting relation with the second cam roller such that the second plunger is configured to reciprocate in response to rotation of the cam lobe with the camshaft, wherein:
- at least one of the first plunger foot and the second plunger foot is configured with a first flat geometric configuration;
- and
- at least one of the first cam roller and the second cam roller is configured with a second flat geometric configuration, corresponding with the first flat geometric configuration of the at least one of the first plunger foot and the second plunger foot, respectively.
A fuel pump assembly for an engine, comprising:
- a fuel pump comprising:
- a camshaft having a cam lobe, the camshaft configured to rotate;
- a first cam roller and a second cam roller disposed about an outer surface of the cam lobe;
- a first pumping assembly configured to interact with the first cam roller, the first pumping assembly including a first plunger and a first plunger foot, the first plunger foot in confronting relation with the first cam roller such that the first plunger is configured to reciprocate in response to rotation of the cam lobe with the camshaft;
- a second pumping assembly configured to interact with the second cam roller, the second pumping assembly including a second plunger and a second plunger foot, the second plunger foot in confronting relation with the second cam roller such that the second plunger is configured to reciprocate in response to rotation of the cam lobe with the camshaft;
- a first controlling mechanism and a second controlling mechanism configured to control a relative location of the first cam roller with respect to the first plunger;
- and
- a third controlling mechanism configured to control, with the second controlling mechanism, a relative location of the second cam roller with respect to the second plunger.
Dependencies are inferred from the claim text.