Fuel pump tappet assembly
AssigneeCummins Inc.
InventorsJohn D. Crofts, Justin Gregory Wenger
Life of this patent
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Abstract
A fuel pump assembly for an internal combustion engine includes a fuel pump housing, a cylindrical bore defined in the fuel pump housing, and a tappet assembly received in the cylindrical bore. The tappet assembly includes a one-piece shoe having a recess disposed in a bottom portion thereof, and a roller that is partially received within the recess and configured to rotate about a roller axis.
Claims20
A fuel pump assembly for an internal combustion engine comprising:
- a fuel pump housing;
- a cylindrical bore defined in the fuel pump housing, wherein an upper end of the cylindrical bore is closed by a lower surface of a cylinder head;
- and
- a tappet assembly slideably received in the cylindrical bore, wherein the tappet assembly includes a one-piece shoe having a recess defined in a bottom portion thereof, and a roller that is partially received within the recess and configured to engage a cam lobe and to rotate about a roller axis, wherein the shoe comprises a peripheral surface having a cylindrical shape that is configured to correspond to an inside surface of the cylindrical bore.
A fuel pump assembly for an internal combustion engine comprising:
- a fuel pump housing;
- a cylindrical bore defined in the fuel pump housing;
- and
- a tappet assembly slideably received in the cylindrical bore, wherein the tappet assembly includes a roller configured to rotate about a roller axis and a shoe, the shoe comprising:
- an upper surface;
- a lower surface;
- a recess defined in the lower surface, wherein the recess is configured to partially receive the roller;
- a pair of parallel, opposed end portions;
- and
- a pair of opposed curved sides extending between the end portions, each curved side having a cylindrical peripheral surface that is configured to correspond to an inside surface of the cylindrical bore.
A tappet assembly configured for use in a fuel pump for an internal combustion engine, the fuel pump including a fuel pump housing having a cylindrical bore defined therein, the tappet assembly comprising:
- a one-piece shoe having a recess defined in a bottom portion thereof;
- and
- a roller that is partially received within the recess and configured to engage a cam lobe and to rotate about a roller axis, wherein the shoe comprises a peripheral surface having a cylindrical shape that is configured to correspond to an inside surface of the cylindrical bore.
Dependencies are inferred from the claim text.