Disconnectable driveline for all-wheel drive vehicle
First Claim
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1. A drivetrain for an all-wheel drive motor vehicle, the drivetrain comprising:
- a first driveline that is adapted to drive a pair of first vehicle wheels, the first driveline including a first differential and a pair of first axleshafts, the first differential having a first differential case and a pair of first output gears driven by the first differential case, the first axleshafts being drivingly coupled to the first output gears and to the first vehicle wheels;
a power switching mechanism having an input shaft adapted to rotate with the first differential case, an output pinion shaft, and a disconnect mechanism, the disconnect mechanism being operable in a disconnected mode, which inhibits transmission of rotary power between the input shaft and the output pinion shaft, and in a connected mode that permits transmission of rotary power between the input shaft and the output pinion shaft; and
a second driveline that is adapted to drive a pair of second vehicle wheels, the second driveline including a propshaft and a drive module, the drive module including an input pinion shaft, a second differential, a pair of second axleshafts, which are adapted to be drivingly coupled to the pair of second vehicle wheels, a torque transfer device, and a limited slip clutch assembly, the second differential having a second differential case and a pair of second output gears that are driven by the second differential case, the second output gears being drivingly coupled to the second axleshafts, the input pinion shaft being coupled by the propshaft to the output pinion shaft of the power switching mechanism, the torque transfer device being operable in a first switching mode, which inhibits transmission of rotary power between the input pinion shaft and the second differential case, and in a second switching mode that permits transmission of rotary power between the input pinion shaft and the second differential case, the limited slip clutch assembly being operable in a first clutch mode, which permits speed differentiation between the second differential case and one of the second axleshafts, and in a second clutch mode that inhibits speed differentiation between the second differential case and said one of the second axleshafts.
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Abstract
A disconnectable driveline arrangement for an all-wheel drive vehicle includes a power take-off unit having a disconnect mechanism, and a drive module having a torque transfer device and a limited slip clutch assembly.
46 Citations
22 Claims
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1. A drivetrain for an all-wheel drive motor vehicle, the drivetrain comprising:
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a first driveline that is adapted to drive a pair of first vehicle wheels, the first driveline including a first differential and a pair of first axleshafts, the first differential having a first differential case and a pair of first output gears driven by the first differential case, the first axleshafts being drivingly coupled to the first output gears and to the first vehicle wheels; a power switching mechanism having an input shaft adapted to rotate with the first differential case, an output pinion shaft, and a disconnect mechanism, the disconnect mechanism being operable in a disconnected mode, which inhibits transmission of rotary power between the input shaft and the output pinion shaft, and in a connected mode that permits transmission of rotary power between the input shaft and the output pinion shaft; and a second driveline that is adapted to drive a pair of second vehicle wheels, the second driveline including a propshaft and a drive module, the drive module including an input pinion shaft, a second differential, a pair of second axleshafts, which are adapted to be drivingly coupled to the pair of second vehicle wheels, a torque transfer device, and a limited slip clutch assembly, the second differential having a second differential case and a pair of second output gears that are driven by the second differential case, the second output gears being drivingly coupled to the second axleshafts, the input pinion shaft being coupled by the propshaft to the output pinion shaft of the power switching mechanism, the torque transfer device being operable in a first switching mode, which inhibits transmission of rotary power between the input pinion shaft and the second differential case, and in a second switching mode that permits transmission of rotary power between the input pinion shaft and the second differential case, the limited slip clutch assembly being operable in a first clutch mode, which permits speed differentiation between the second differential case and one of the second axleshafts, and in a second clutch mode that inhibits speed differentiation between the second differential case and said one of the second axleshafts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A drivetrain for an all-wheel drive motor vehicle, the drivetrain comprising:
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a first driveline that is adapted to drive a pair of first vehicle wheels, the first driveline including a first differential and a pair of first axleshafts, the first differential having a first differential case and a pair of first output gears driven by the first differential case, the first axleshafts are configured to be drivingly coupled to the first output gears and to the first vehicle wheels; a power switching mechanism having an input shaft adapted to rotate with the first differential case, an output pinion shaft, and a disconnect mechanism, the disconnect mechanism being operable in a disconnected mode, which inhibits transmission of rotary power between the input shaft and the output pinion shaft, and in a connected mode that permits transmission of rotary power between the input shaft and the output pinion shaft; and a second driveline that is adapted to drive a pair of second vehicle wheels, the second driveline including a propshaft and a drive module, the drive module including an input pinion, a case, a ring gear, a torque transfer device, a pair of output members, and a limited slip clutch assembly, the propshaft coupling the input pinion shaft to the output pinion shaft of the power switching mechanism, the case being rotatably disposed about a first axis that is perpendicular to a second rotational axis about which the input pinion shaft rotates, the ring gear being rotatable relative to the case, the torque transfer device being disposed about the first axis and being selectively operable for transmitting rotary power between the ring gear and the case, the output members being configured to transmit rotary power in torque paths between the case and the second vehicle wheels, the limited slip clutch assembly being selectively operable in a mode that rotationally couples one of the output members and the case. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification