Motor driven power steering system

Details Motor driven power steering system Motor driven power steering system

1987-03-31

1988-08-23

Love, John J.

Motor vehicles

Compensating devices

318293, 361 23, B62D 504

Patent

active

047654260

ABSTRACT:
A power steering system includes an electric motor associated as an assistive power source with a steering mechanism. The steering system includes an electric power source for the motor, a motor driver connected to the electric power source for driving the motor, and a control system for controlling the motor driver. The steering system also includes a relay circuit for selectively electrically connecting and disconnecting the motor driver and the motor, thereby to effectively prevent a closed loop being formed which would otherwise provide a short circuit between the input terminals of the motor when the steering mechanism is manually operated without assistive steering power upon a failure of the power steering system.

REFERENCES:
patent: 4394605 (1983-07-01), Terawaza
patent: 4557342 (1985-12-01), Drutchas
patent: 4574229 (1986-03-01), Kim
patent: 4574903 (1986-03-01), Hashimoto et al.
patent: 4645025 (1987-02-01), Ohe et al.

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