Motor vehicles – Compensating devices
Patent
1987-04-21
1988-09-20
Love, John J.
Motor vehicles
Compensating devices
318473, 361 24, B62D 504
Patent
active
047718455
ABSTRACT:
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 detects for detecting 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.
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Honda Giken Kogyo Kabushiki Kaisha
Love John J.
Watts Charles R.
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