Motor vehicle drive
First Claim
Patent Images
1. Motor vehicle drive comprising:
- at least one electric machine;
a clutch device including at least one clutch in a drive line between the electric machine and an output for driving wheels of the motor vehicle; and
a control device which controls the clutch in a torque-transmitting slipping manner to avoid thermal overloading both of the clutch and of the electric machine when, compared with normal operation, an increased temperature or increased waste heat arises in the electric machine when the speed is low or the motor vehicle is stationary and the torque of the electric machine is simultaneously high.
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Accused Products
Abstract
A motor vehicle drive includes an electric motor and at least one clutch in the drive line between the electric machine and the driven wheels of a motor vehicle. If the special case occurs in which high torques have to be supplied by the electric motor when the vehicle speed is very low or when the vehicle is stationary, the clutch is operated in a torque-transmitting slipping manner, ensuring that neither the electric machine nor the clutch are thermally overloaded.
102 Citations
17 Claims
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1. Motor vehicle drive comprising:
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at least one electric machine;
a clutch device including at least one clutch in a drive line between the electric machine and an output for driving wheels of the motor vehicle; and
a control device which controls the clutch in a torque-transmitting slipping manner to avoid thermal overloading both of the clutch and of the electric machine when, compared with normal operation, an increased temperature or increased waste heat arises in the electric machine when the speed is low or the motor vehicle is stationary and the torque of the electric machine is simultaneously high. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Method of operating a motor vehicle drive that includes at least one electric machine and a clutch device including at least one clutch in a drive line between the electric machine and an output for driving wheels of the motor vehicle, comprising:
controlling the at least one clutch of the clutch device in a torque-transmitting slipping manner to avoid thermal overloading both of the clutch and of the electric machine when, compared with normal operation, an increased temperature or increased waste heat arises in the electric machine when the speed is low or the motor vehicle is stationary and the torque of the electric machine is simultaneously high. - View Dependent Claims (12, 13, 14, 15, 16, 17)
Specification