Drive train for a motor vehicle and method for operating such a drive train
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United States of America Patent
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Feb 9, 2010
Grant Date -
Apr 12, 2007
app pub date -
Oct 4, 2006
filing date -
Oct 11, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method for operating a drive train for a motor vehicle, a torque is produced by means of an internal combustion engine as a function of an available torque set value signal and transmitted to drive wheels by means of a clutch. With the help of an electric motor, a closing force is applied, with which the clutch is held in a closed position against a restoring force. The electric motor is energized in such a way that a high current is used in the case of a high torque and a lower current is used in the case of a lower torque. The thermal load of the electric motor is determined and a load signal corresponding to the thermal load is produced. The load signal is compared with a load limit signal assigned to a permissible load range. If the load signal deviates from the load-limit signal, the torque of the internal combustion engine is limited.
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