| 摘要 |
A method and an apparatus for controlling output torque of a motor for an electric vehicle in downhill mode comprises following steps: detecting a tilt angle value theta, a current vehicle speed value V and an accelerator-pedal travel value Gain of the vehicle, determining whether the vehicle is in downhill mode or not, and if the result is positive, then calculating a downhill slip torque T1 of the vehicle under the tilt angle value theta, obtaining a maximum output torque T2, calculating an output torque T of the motor based on T1, T2, Gain and a given vehicle speed delimitative value Vref, and controlling the motor to output the calculated output torque T. The present invention ensures the vehicle speed not too high by controlling the output torque of an electric vehicle in downhill mode, even if the brake-pedal travel is zero.
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