B - Operations – Transporting – 62 – D
Patent
B - Operations, Transporting
62
D
180/56
B62D 5/04 (2006.01)
Patent
CA 1282710
ABSTRACT OF THE DISCLOSURE A motor-driven power steering system has a steering mechanism for interconnecting a steering wheel and a steerable wheel. An electric motor applies a steering assistive force to the steering mechanism. A plurality of frictional elements are each provided with a lubricating material having a temperature-dependent viscosity. The motor-driven power steering system also includes a steering torque detector for detecting a steering torque applied by the steering wheel through the steering mechanism and for generating a signal indicative of the steering torque. A temperature detector detects the temperature of at least one of the frictional elements and generates a signal indicative of the temperature. A motor control signal generator generates a motor control signal based on at least the signals from the steering torque detector and the temperature detector. A motor driver controls the electric motor based on the motor control signal. There is also disclosed a method of controlling the motor-driven power steering system by controlling the electric motor irrespective of the friction of the frictional elements which varies dependent on the temperature.
535277
Shimizu Yasuo
Honda Giken Kogyo Kabushiki Kaisha
Johnson Douglas S. Q.c.
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