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:
Jan. 20, 2004
Filed:
Sep. 25, 2001
Kenichi Shibasaki, Maebashi, JP;
Shuji Endo, Maebashi, JP;
NSK Ltd., Tokyo, JP;
Abstract
A control device which: controls a motor based upon a steering assist instruction value calculated in a steering assist command operating section based upon a steering torque generated in a steering shaft and a current control value calculated from a current value of the motor for applying a steering assist force to a steering mechanism; and at least partially possesses a gradient when a gain curve of characteristics of an entire control system having the steering assist command value as its input exceeds a predetermined value. The steering assist command value operating section is composed of an approximation functional expression in which a one-step derived function is continuous, and the steering assist command value is obtained by calculations based upon the approximation functional expression.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile