Variable camshaft timing assembly
AssigneeBorgWarner Inc.
InventorDaniel Brown
Life of this patent
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Abstract
A variable camshaft timing (VCT) assembly for controlling the angular position of concentric camshafts includes an independent VCT device that is configured to couple with a first concentric camshaft and change an angular position of the first concentric camshaft relative to an angular position of a crankshaft; and one or more dependent VCT devices mechanically linking an output of the independent VCT device with a second concentric camshaft, wherein the dependent VCT device(s) change(s) an angular position of the second concentric camshaft relative to the angular position of the first concentric camshaft based on angular movement of the output of the independent VCT device.
Claims13
A variable camshaft timing (VCT) assembly for controlling an angular position of camshafts, comprising:
- a hydraulically-actuated or electrically-actuated camshaft phaser that has an output, comprising a rotor having vanes or a mechanical gearbox, configured to couple with a first camshaft and change an angular position of the first camshaft relative to an angular position of a crankshaft;
- and
- a link including a first pivot and a second pivot that mechanically link the output of the camshaft phaser with a second camshaft that is concentric to the first camshaft, wherein movement of the link about the first pivot or the second pivot changes an angular position of the second camshaft relative to the angular position of the first camshaft based on angular movement of the output of the camshaft phaser, wherein the pivot is offset from an axis of camshaft rotation.
A variable camshaft timing (VCT) assembly for controlling an angular position of camshafts, comprising:
- a hydraulically-actuated or electrically-actuated camshaft phaser having an output that is configured to couple with a first concentric camshaft and change an angular position of the first concentric camshaft relative to an angular position of a crankshaft;
- a planetary gear that rotates about a planetary gear shaft and engages a ring gear coupled with the housing;
- a camshaft pivot coupled with the first concentric camshaft or the output of the camshaft phaser;
- a planetary gear pivot coupled to the planetary gear, wherein the planetary gear pivot is spaced apart from the planetary gear shaft;
- and
- a link that movably couples the planetary gear pivot and the camshaft pivot, wherein the planetary gear, the camshaft pivot, and the link change an angular position of a second concentric camshaft relative to the angular position of the first concentric camshaft based on angular movement of the output of the camshaft phaser.
A variable camshaft timing (VCT) assembly for controlling an angular position of camshafts, comprising:
- a hydraulically-actuated or electrically-actuated camshaft phaser having an output that is configured to couple with a first camshaft and change an angular position of the first camshaft relative to an angular position of a crankshaft;
- and
- a planetary gear carried by the output of the camshaft phaser, a pivot on a face of the planetary gear, a pivot attached to a second camshaft, and a link that pivotably connects the pivot on the face of the planetary gear and the pivot attached to the second camshaft.
Dependencies are inferred from the claim text.