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. 05, 2008
Filed:
Oct. 10, 2003
Atsuo Sakai, Okazaki, JP;
Atsuo Sakai, Okazaki, JP;
JTEKT Corporation, Osaka, JP;
Abstract
A steering control device () is provided with a end-of-movement reaction force generation unit (an end reaction force control portion ()). An end reaction force generating current iwhich act as return a handle toward a straight-ahead position is rapidly generated in the vicinity of an upper and a lower limit of a vehicle wheel steering range. For example, a reaction force motor () may be additionally commanded using a newly generated command current i. Accordingly, an output torque of the reaction force motor () becomes proportional to a new command value iof an Equation i=i+i, where iis a current command of a reaction force control portion (). As a result of configuring the end-of-movement reaction force generation unit is this manner, for example, it is possible to generate a virtual contact resistance force (a steering reaction force) for a steering angle θ without causing heat build-up, or the like, of a motor, when no physical limit (an end-of-movement of contact point) is provided for a rotation range of a steering wheel (handle).