Planetary gear transmission systems or components – Nonplanetary variable speed or direction transmission...
Patent
1998-02-04
1999-11-23
Marmor, Charles A
Planetary gear transmission systems or components
Nonplanetary variable speed or direction transmission...
475204, 180247, 180249, B60K 17354, F16H 3708
Patent
active
059891467
ABSTRACT:
A transmission for a four-wheel drive vehicle having a multi-speed geartrain and power transfer mechanism incorporated into a common housing assembly. The multi-speed geartrain includes a input shaft, a mainshaft, and a plurality of constant-mesh gearsets arranged for selectively coupling the mainshaft to the input shaft for driven rotation at various speed ratios. The mainshaft can be selectively coupled to the power transfer mechanism for establishing two alternative power transmission routes. In particular, a synchronized range shift mechanism is provided for establishing a high-range transmission route and a low-range transmission route from the mainshaft to a primary driveline to define a two-wheel drive mode. A portion of the drive torque delivered to the primary driveline can be transferred automatically through a transfer clutch to the secondary driveline to establish an on-demand four-wheel drive mode. As an option, a mode clutch can be provided for permitting the secondary driveline to be locked to the primary driveline for establishing a part-time four-wheel drive mode.
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Brown David
Zajac Alan P.
Lund Scott
Marmor Charles A
New Venture Gear Inc.
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