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:
May. 12, 1998
Filed:
Oct. 18, 1995
Applicant:
Inventors:
Mitsuhiko Nishimoto, Kashihara, JP;
Makoto Inoue, Hirakata, JP;
Assignees:
Koyo Seiko Co., Ltd., Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
701 41 ; 701 42 ; 701 43 ; 180446 ; 318434 ;
Abstract
The invention provides an electric power steering apparatus in which a duty ratio upper limit value is obtained on the basis of a vehicle speed of a vehicle and a supply voltage for a motor and a target duty ratio is determined as a value not exceeding the duty ratio upper limit value, so as to prevent an excessive steering assisting force from being caused by the malfunction of a driving current detecting circuit for the motor.