Motor driven power steering apparatus

Details Motor driven power steering apparatus Motor driven power steering apparatus

1989-02-28

1990-06-19

Hill, Mitchell J.

Motor vehicles

Compensating devices

36442405, B62D 504

Patent

active

049344730

ABSTRACT:
A motor driven power steering apparatus includes a steering mechanism having a torque detector for detecting torque applied to the mechanism through a steering wheel. An electric motor is connected to the steering mechanism through an electromagnetic clutch. The current in the electric motor is monitored and if it becomes excessive, a control circuit is activated to deactivate the clutch. The electric motor is disconnected from the steering mechanism at the time the engine of the vehicle is starting and at other times during operation of the vehicle to determine if excess current flows through the motor which would be indicative of a malfunction of the electric motor.

REFERENCES:
patent: 4789040 (1988-12-01), Morishita et al.

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