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US 10,539,046 B2Granted
Camshaft phaser/compression brake release integration with concentric camshaft
AssigneeCummins Inc.
InventorAdam C. Cecil
Life of this patent
Estimating the term…
Abstract
Valve trains employing a splined interface between phaser(s) and a concentric camshaft, actuator at rear of camshaft actuated by an actuation rod, adding a clearance hole to the lobe pin for clearance to the actuation rod, supplying oil to camshaft bearings via the concentric camshaft inner tube, and bolt on front camshaft bearing. The valve trains may further employ a third rocker lever that is usable for a selectable valve event (e.g. compression release brake) while also implementing variable valve timing and a concentric camshaft.
Claims30
A valve train, comprising:
- a concentric camshaft including:
- an outer tube;
- and
- an inner shaft extending within the outer tube;
- a phaser including:
- an intake camshaft phaser vane cavity within the phaser;
- an intake camshaft phaser vane plate independently rotatable within the intake camshaft phaser vane cavity;
- an exhaust camshaft phase vane cavity within the phaser;
- and
- an exhaust camshaft phaser vane plate independently rotatable within the exhaust camshaft phaser vane cavity;
- wherein the intake camshaft phaser vane plate includes splines engaging the outer tube of the concentric camshaft;
- and
- wherein the exhaust camshaft phaser vane plate includes splines engaging the inner shaft of the concentric camshaft.
10 more elements
A valve train, comprising:
- a concentric camshaft including:
- an outer tube;
- and
- an inner shaft extending within the outer tube;
- a phaser including:
- an intake camshaft phaser vane cavity within the phaser;
- an intake camshaft phaser vane plate independently rotatable within the intake camshaft phaser vane cavity;
- an exhaust camshaft phase vane cavity within the phaser;
- and
- an exhaust camshaft phaser vane plate independently rotatable within the exhaust camshaft phaser vane cavity;
- wherein the intake camshaft phaser vane plate includes splines engaging the inner shaft of the concentric camshaft;
- and
- wherein the exhaust camshaft phaser vane plate includes splines engaging the outer tube of the concentric camshaft.
10 more elements
Dependencies are inferred from the claim text.