Patent ID: 8478467

Claim:
A method for controlling output torque of an electric motor for an electric vehicle in an uphill mode, comprising steps of: S1) detecting a tilt angle value (θ), a current vehicle speed value (V), and an accelerator-pedal travel value (Gain) of the vehicle; S2) determining if the vehicle is in uphill mode; S3) if the vehicle is in an uphill mode, then calculating a minimum torque (T 1 ) required to prevent the vehicle from slipping backward based on the tilt angle value (θ) and the current vehicle speed value (V), obtaining a maximum output torque (T 2 ) of the motor based on the current vehicle speed value (V), calculating an output torque (T) of the motor based on the minimum torque (T 1 ) and the maximum output torque (T 2 ) and the accelerator-pedal travel value (Gain), and controlling an output of the motor based on the calculated output torque (T); S4) if the vehicle is not in an uphill mode, calculating a maximum output torque (T 2 ) of the motor under the current vehicle speed value (V), calculating an output torque T of the motor based on the maximum output torque (T 2 ) and the accelerator-pedal travel value (Gain), and controlling an output of the motor based on the calculated output torque (T); and wherein the output torque (T) of the motor is calculated in step S3 according to the equation: T=T 1 +(T 1 −T 1 )*Gain, and wherein the output torque (T) of the motor is calculated in S4 according to the equation: T=T 2 *Gain.