Control apparatus for electric automobile
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United States of America Patent
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Apr 30, 2013
Issued Date -
N/A
app pub date -
Nov 11, 2010
filing date -
Nov 19, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A clutch mechanism is provided between a drive wheel and an electric motor. In a high vehicle speed region, the electric motor is decoupled from the drive wheel to prevent the electric motor from over-speeding. In the high vehicle speed region, in which the clutch mechanism is switched to a disengaged condition, rotation speed control is executed on the electric motor when a state of charge falls below a predetermined lower limit value, and a motor rotation speed is maintained at a target rotation speed on a lower rotation side than an upper limit rotation speed. Further, the clutch mechanism is switched from the disengaged condition to a slip condition. Hence, a limited power generation torque is supplied to the electric motor, and thus the electric motor can be controlled to a regeneration condition while suppressing the motor rotation speed to or below the upper limit rotation speed.
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