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:
Jul. 27, 1999
Filed:
Feb. 24, 1997
Applicant:
Inventors:
Assignee:
Koyo Seiko Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B62D / ;
U.S. Cl.
CPC ...
701 41 ; 701 42 ; 180422 ; 180446 ;
Abstract
An electric power steering apparatus comprises broken point characteristics determining means for determining a value of a steering torque signal corresponding to a broken point of a broken line function on the basis of a vehicle speed signal from a vehicle speed sensor, a broken line function circuit for determining the broken line function in accordance with the broken point determining signal determined by the broken point characteristics determining means and outputting an analog signal corresponding to the broken line function, and means for determining a target value of a motor current to drive an electric motor for assisting steering on the basis of the analog signal.