Motor driven power steering system

Details Motor driven power steering system Motor driven power steering system

1983-11-30

1986-03-11

Pekar, John A.

Motor vehicles

Compensating devices

B62D 504

Patent

active

045749035

ABSTRACT:
A power steering system uses an electric motor to produce an auxiliary torque which is added to the torque applied to the steering wheel of a vehicle by the driver. The torque applied by the driver is detected by sensors. The system includes a control apparatus to control the operation of the motor according to the output signal from the sensors. The system further includes a closed electrical loop for feeding a signal corresponding to the output from the motor back to the input side of the loop. A variable-resistor is placed so that the amplification factor of an amplifier included in the loop can be changed by the resistor. The knob attached to the variable-resistor is disposed on the dashboard of the vehicle such that it can be reached by the driver's hand. This permits the driver to change the servo ratio, i.e., the ratio of the output torque of the power steering system to the input torque applied by the driver, while the vehicle is in motion.

REFERENCES:
patent: 2698006 (1954-12-01), Wichmann et al.
patent: 2754465 (1956-07-01), Brier
patent: 3191109 (1965-06-01), Hepner
patent: 3924705 (1975-12-01), Sugisawa
patent: 4083422 (1978-04-01), Blakeslee et al.

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