Control system for a power steering device

Details Control system for a power steering device Control system for a power steering device

1982-08-25

1984-10-09

Chin, Gary

Boots, shoes, and leggings

180142, B62D 506

Patent

active

044765290

ABSTRACT:
A control system for a power steering device of a vehicle, wherein the rotational angular position of a steering wheel, the vehicle driving speed and the steering torque applied to the steering wheel are detected and processed by a digital computer. The computer selects one of plural control values stored in a memory device based upon the detected steering torque and the detected vehicle speed and outputs the selected one of the control values along with solenoid selection data which is determined based upon the detected rotary angular position data. An electric current having a value corresponding to the selected one of the control values is applied from a solenoid drive circuit to one of a pair of solenoids, so that a four-way open center type solenoid valve having the solenoids controls the supply and exhaust of pressurized fluid to and away from a power cylinder of the power steering device in accordance with the detected vehicle driving speed and the detected steering torque.

REFERENCES:
patent: 3881567 (1975-05-01), Leiber
patent: 3897846 (1975-08-01), Inoue
patent: 4320812 (1982-03-01), Takaoka et al.
patent: 4392540 (1983-07-01), Michio et al.
patent: 4412594 (1983-11-01), Furukawa et al.
patent: 4418780 (1983-12-01), Ito et al.

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