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US 11,885,246 B2Granted
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 wherein the raised ring defines a lower axial extremity of the engine valve and the dimple defines an upper axial extremity of the combustion surface.
1 more element
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;
- the raised ring defining a radial width, and an inside diameter dimension radially inward of the first convex arcuate surface and extending through the axis of revolution, and the inside diameter dimension is larger than the radial width.
2 more elements
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.
1 more element
Dependencies are inferred from the claim text.