The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 1991
Filed:
May. 25, 1989
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B62D / ;
U.S. Cl.
CPC ...
36442405 ; 180 791 ; 180142 ;
Abstract
An electrically-operated power steering control system is disclosed for an electrically-operated power steering apparatus in which a motor is controlled in accordance with a predetermined function of the steering power applied to a steering wheel and an auxiliary steering power is supplied by this motor. The motor is controlled on the basis of a conduction ratio which is modified depending on a comparison between a change of a detected torque signal of a torque sensor and the rate of change of the steering angle.