Oldham flexplate for concentric camshafts controlled by variable camshaft timing
AssigneeBorgWarner Inc.
InventorsShawn Blackmur, Chad McCloy
Life of this patent
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Abstract
A variable camshaft timing (VCT) assembly for changing the angular position of concentric camshafts relative to a crankshaft includes a coupling plate having a first plurality of Oldham features configured to engage a first plurality of Oldham receiving features carried by a first VCT device and a second plurality of Oldham features configured to engage a second plurality of Oldham receiving features carried by a second VCT device; the coupling plate is positioned axially between the first VCT device and the second VCT device permitting the first VCT device and the second VCT device to move radially outwardly and inwardly relative to an axis of camshaft rotation.
Claims19
A variable camshaft timing (VCT) assembly for changing an angular position of concentric camshafts relative to a crankshaft, comprising:
- a coupling plate, including a first plurality of Oldham features configured to engage a first plurality of Oldham receiving features carried by a first VCT device and a second plurality of Oldham features configured to engage a second plurality of Oldham receiving features carried by a second VCT device, wherein the coupling plate is positioned axially between the first VCT device and the second VCT device permitting the first VCT device and the second VCT device to move radially outwardly and inwardly relative to an axis of camshaft, rotation.
A variable camshaft timing (VCT) assembly for changing an angular position of concentric camshafts relative to a crankshaft, comprising:
- a first VCT device, having a first plurality of Oldham receiving features, configured to rigidly couple with a first concentric camshaft:
- a second VCT device, having a second plurality of Oldham receiving features configured to rigidly couple with a second concentric camshaft:
- and
- a coupling plate, including a first plurality of Oldham features that engage the first plurality of Oldham receiving features and a second plurality of Oldham features that engage the second plurality of Oldham receiving features, positioned axially between the first VCT device and the second VCT device, wherein the first VCT device and the second VCT device move radially outwardly and inwardly relative to an axis of camshaft rotation.
A variable camshaft timing (VCT) assembly for changing an angular position of concentric camshafts relative to a crankshaft, comprising:
- a first VCT device, having a first plurality of Oldham receiving features that extend radially-outwardly away from an axis of camshaft, rotation, configured to rigidly couple with a first concentric camshaft;
- a second VCT device, having a second plurality of Oldham receiving features that extend at, least partially in a direction parallel to the axis of camshaft rotation, configured to rigidly couple with a second concentric camshaft;
- and
- a coupling plate, including a first plurality of Oldham features formed in an inner diameter that engage the first plurality of Oldham, receiving features, and a second plurality of Oldham features formed in an outer diameter that engage the second plurality of Oldham receiving features, the coupling plate being positioned axially between the first VCT device and the second VCT device, wherein the first VCT device and the second. VCT device are moveable radially outwardly and inwardly relative to an axis of camshaft rotation via, the first and second plurality of Oldham receiving features and the first and second plurality of Oldham features.
Dependencies are inferred from the claim text.