Motor-driven power steering system for automotive vehicles

Details Motor-driven power steering system for automotive vehicles Motor-driven power steering system for automotive vehicles

1987-03-18

1989-04-04

Chin, Gary

Boots, shoes, and leggings

180 791, 180142, B62D 506

Patent

active

048191701

ABSTRACT:
A motor-driven power steering system for an automotive vehicle has a control device for controlling a motor to generate assistive torque to be applied to an output shaft based on output signals from a torque detecting mechanism which detects steering torque acting on an input shaft. The control device has a control signal generating circuit for generating control signals including a component based on the steering torque signals, and a driving circuit responsive to the control signals for supplying a driving signal to said motor. The steering system also includes a mechanism for detecting a steering speed, a mechanism for detecting a vehicle speed, and a correcting mechanism for correcting a basic component based on the steering speed such that it is reduced as the vehicle speed increases. The control signal generating circuit receives a corrected steering speed component from the correcting mechanism and adds the corrected steering speed component to the steering torque component for generating the control signals including the corrected steering speed component.

REFERENCES:
patent: 4657103 (1987-04-01), Shimizu
patent: 4664211 (1987-05-01), Oshita et al.
patent: 4681181 (1987-07-01), Shimizu
patent: 4688655 (1987-08-01), Shimizu
patent: 4715461 (1987-12-01), Shimizu
patent: 4715463 (1987-12-01), Shimizu
patent: 4726437 (1988-02-01), Norton

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