Engine valve with raised ring or dimple
AssigneeCaterpillar Inc.
InventorsJeffrey Clark Krieger, Michael D. Roley, Kyle Michael Rader
Life of this patent
Estimating the term…
Abstract
An engine valve includes a stem, a head comprising an outer lip surface, a seating surface extending from the outer lip surface toward the stem, and a combustion surface extending from the outer lip surface on the opposite side of the head as compared to the seating surface. The combustion surface includes a first convex arcuate surface spaced away from the outer lip surface, at least partially forming a raised ring, and a first concave arcuate surface spaced away from the outer lip surface, at least partially forming a dimple.
Claims20
An engine head assembly for an internal combustion engine comprising:
- an engine head having a fluid conduit formed therein;
- and
- an engine valve including a stem, a head comprising an outer lip surface, a seating surface interposed between the stem and the outer lip surface, and a combustion surface extending from the outer lip surface on the opposite side of the head as compared to the seating surface;
- wherein the combustion surface includes a first convex arcuate surface spaced away from the outer lip surface, at least partially forming a raised ring, and a first concave arcuate surface spaced away from the outer lip surface, at least partially forming a dimple, and the engine valve includes a body of revolution, defining an axis of revolution, and the raised ring defines a lower axial extremity of the engine valve.
An engine valve comprising:
- a body of revolution, defining an axis of revolution, a radial direction perpendicular to the axis of revolution, and a circumferential direction about the axis of revolution,
- the body of revolution including a stem, a head comprising an outer lip surface, a seating surface extending radially and axially inwardly from the outer lip surface toward the stem, and a combustion surface extending from the outer lip surface on the opposite side of the head as compared to the seating surface;
- and
- wherein the combustion surface includes a first convex arcuate surface spaced away from the outer lip surface a first radial distance, at least partially forming a raised ring extending circumferentially about the axis of revolution and defining an axial extremity of the body of revolution, and a first planar surface extending radially inwardly from the outer lip surface toward the first convex arcuate surface and perpendicularly to a direction parallel with the axis of revolution.
An engine valve comprising:
- a body of revolution, defining an axis of revolution, a radial direction perpendicular to the axis of revolution, and a circumferential direction about the axis of revolution,
- the body of revolution including a stem, a head comprising an outer lip surface, a seating surface extending radially and axially inwardly from the outer lip surface toward the stem, and a combustion surface extending from the outer lip surface on the opposite side of the head as compared to the seating surface;
- and
- wherein the combustion surface includes a first concave arcuate surface centered on the axis of revolution at a trough point, the first concave arcuate surface extending circumferentially about the axis of revolution, at least partially forming a dimple, a conical surface or a planar surface extending radially away from the first concave arcuate surface, and a convex transitional surface connecting the conical surface or the planar surface to the first concave arcuate surface, and the combustion surface includes a first convex arcuate surface defining at least partially an axial extremity of the body of revolution.
Dependencies are inferred from the claim text.