METHOD FOR OPERATING A DRIVE TRAIN
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Accused Products
Abstract
A method of operating a motor vehicle drive train having a hybrid drive including an internal combustion engine, an electric motor and an automatic transmission. A clutch is located between the internal combustion engine and the electric motor, and a clutch or a torque converter is located between the electric motor and the automatic transmission such that, when the drive train is powered exclusively by the electric motor, the internal combustion engine can be started by engagement of the clutch located between the internal combustion engine and the electric motor. The clutch, arranged between the internal combustion engine and the electric motor, is engaged during the process of downshifting when the internal combustion engine is started.
38 Citations
19 Claims
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1-9. -9. (canceled)
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10. A method of operating a motor vehicle drive train having a hybrid drive comprising an internal combustion engines an electric motor, and an automatic transmission with a clutch arranged between the internal combustion engine and the electric motor, and one of another clutch and a torque converter located, along the drive train, between the electric motor and the automatic transmission, whereby when the drive train is powered exclusively by the electric motor, the internal combustion an engine is started by engagement of the clutch arranged between the internal combustion engine and the electric motor,
the method comprising the step of, during a downshift, engaging the clutch arranged between the internal combustion engine and the electric motor of the hybrid drive to start the internal combustion engine.
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19. A method of operating a motor vehicle drive train having a hybrid drive, the hybrid drive including an internal combustion engine, an electric motor and an automatic transmission,
arranging a clutch, in the drive train, between the internal combustion engine and the electric motor; -
arranging one of another clutch and a torque converter, in the drive train, between the electric motor and the automatic transmission; driving the drive train exclusively via the electric motor; downshifting the automatic transmission from a higher gear to a lower gear;
endengaging the clutch arranged between the internal combustion engine and the electric motor to start the internal combustion engine.
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Specification