Hybrid electric vehicle powertrain with torque transfer case
First Claim
1. A hybrid electric vehicle powertrain for an automotive vehicle comprising an engine, a first traction wheel and axle assembly, a second traction wheel and axle assembly, a power transmission drivably connected to the engine and a torque transfer case with a transfer case torque input shaft connected drivably to a transmission torque output shaft, the powertrain comprising:
- an electric motor-generator;
a first transfer case torque output shaft connected drivably to the first traction wheel and axle assembly;
the electric motor-generator and the first transfer case torque output shaft being assembled on a common first axis;
a second transfer case torque output shaft disposed on a second axis that is offset from the first axis;
the second traction wheel and axle assembly being drivably connected to the second transfer case torque output shaft;
a torque cross-drive mechanism drivably connecting the motor-generator to the second transfer case torque output shaft;
the torque cross-drive mechanism comprising a torque output gear drivably connected to the second transfer case torque output shaft, at least one torque input gear drivably connected to the motor-generator and at least one idler gear drivably connecting the one torque input and torque output gears;
the one torque input gear of the cross-drive mechanism being journalled on the first axis;
the torque output gear of the cross-drive mechanism being journalled on the second axis; and
the at least one idler gear being journalled on a third axis that is offset from the first and second axes.
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Accused Products
Abstract
A torque transfer case for a hybrid electric vehicle powertrain with engine and electric power sources is described, the electric power source comprising an electric motor and a battery. It distributes driving power to front and rear traction wheel and axle assemblies to effect all-wheel drive or four-wheel drive as well as regenerative power recovery. The electric power source can be used for engine cranking and the engine can be used for battery charging.
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Citations
15 Claims
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1. A hybrid electric vehicle powertrain for an automotive vehicle comprising an engine, a first traction wheel and axle assembly, a second traction wheel and axle assembly, a power transmission drivably connected to the engine and a torque transfer case with a transfer case torque input shaft connected drivably to a transmission torque output shaft, the powertrain comprising:
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an electric motor-generator; a first transfer case torque output shaft connected drivably to the first traction wheel and axle assembly; the electric motor-generator and the first transfer case torque output shaft being assembled on a common first axis; a second transfer case torque output shaft disposed on a second axis that is offset from the first axis; the second traction wheel and axle assembly being drivably connected to the second transfer case torque output shaft; a torque cross-drive mechanism drivably connecting the motor-generator to the second transfer case torque output shaft; the torque cross-drive mechanism comprising a torque output gear drivably connected to the second transfer case torque output shaft, at least one torque input gear drivably connected to the motor-generator and at least one idler gear drivably connecting the one torque input and torque output gears; the one torque input gear of the cross-drive mechanism being journalled on the first axis; the torque output gear of the cross-drive mechanism being journalled on the second axis; and the at least one idler gear being journalled on a third axis that is offset from the first and second axes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A hybrid electric vehicle powertrain for an automotive vehicle comprising an engine, a first traction wheel and axle assembly, a second traction wheel and axle assembly, a power transmission drivably connected to the engine and a torque transfer case with a transfer case torque input shaft connected to a transmission torque output shaft, the powertrain comprising:
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an electric motor-generator; a first transfer case torque output shaft drivably connected to the first traction wheel and axle assembly; a second transfer case torque output shaft connected drivably to the second traction wheel and axle assembly; the electric motor-generator and the first transfer case torque output shaft being on a common first axis; at least one torque transfer case torque input gear on the first axis; the second torque transfer case torque output shaft being on a second axis; a range coupler clutch assembly connecting the motor-generator to the torque transfer case torque input shaft; at least one idler gear defining in part a driving connection between the one torque transfer case torque input gear and the second torque output shaft; a torque splitter gear unit on the first axis comprising a first gear element connected to the first torque transfer case torque output shaft; the range coupler clutch assembly selectively connecting a second gear element of the torque splitter gear unit to the transfer case torque input shaft; and a geared driving connection between a third gear element of the torque splitter gear unit and the second transfer case torque output shaft whereby an all-wheel drive mode is established. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification