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    • 4. 发明授权
    • Electric power steering system
    • 电动助力转向系统
    • US4834203A
    • 1989-05-30
    • US213111
    • 1988-06-29
    • Tsutomu TakahashiShinji ItouSaiichiro OshitaToyohiko Mouri
    • Tsutomu TakahashiShinji ItouSaiichiro OshitaToyohiko Mouri
    • B62D5/04B62D6/00B62D6/02B62D101/00B62D111/00B62D119/00
    • B62D5/0466
    • An electric power steering system has a torsion torque sensor provided for detecting torsion torque generating in a steering system of a motor vehicle, for providing an assist signal for driving a motor to turn a steering wheel. A steering angle sensor is provided for detecting steering angle of the steering wheel and for producing a steering angle signal. In response to the steering angle signal, a return torque signal is produced for steering wheel. A vehicle speed sensor is provided for producing a vehicle speed signal dependent on speed of the vehicle, and a calculator is provided calculating lateral acceleration impared to the vehicle and for producing a lateral-acceleration-dependent-return torque signal. In accordance with the vehicle speed signal, the lateral-acceleration-dependent-return torque signal is corrected to produce return torque correcting signal, the absolute value of which reduces with increase of vehicle speed. The return torque correcting signal is added to the return torque signal for correcting the latter signal.
    • 电动助力转向系统具有用于检测在机动车辆的转向系统中产生的扭矩的扭矩传感器,用于提供用于驱动电动机以转动方向盘的辅助信号。 提供用于检测方向盘的转向角并产生转向角信号的转向角传感器。 响应于转向角信号,产生用于方向盘的返回转矩信号。 提供了一种用于产生取决于车辆速度的车速信号的车速传感器,并且提供计算器,其计算向车辆施加的横向加速度并产生横向加速度相关返回扭矩信号。 根据车速信号,对横向加速度相关返回扭矩信号进行校正,以产生返回扭矩校正信号,其绝对值随着车速的增加而减小。 返回扭矩校正信号被添加到用于校正后一信号的返回转矩信号。