| 摘要 |
An automated twin-clutch multi-speed transmission is disclosed for use in a four-wheel drive vehicle. The transmission includes a first engine clutch operable to establish a releasable drive connection between the engine and a first input shaft, a first motor/generator connected to the first input shaft, a second engine clutch operable to establish a releasable drive connection between the engine and a second input shaft, a second motor/generator connected to the second input shaft, a mainshaft, and a geartrain for selectively establishing a plurality of forward and reverse speed ratio drive connections between the input shafts and the mainshaft. The transmission further includes power-operated dog clutches for selectively engaging constant-mesh gearsets associated with the geartrain, and a transmission controller for controlling coordinated actuation of the first and second engine clutches, the first and second motor-generators, and the power-operated dog clutches to permit non-power interrupted ("powershift") sequential gear changes automatically without input from the vehicle operator. An interaxle differential transfers drive torque from the mainshaft to the front and rear drivelines to establish a full-time four-wheel drive mode.
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