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:
Apr. 27, 2021
Filed:
Feb. 03, 2017
Hitachi Automotive Systems, Ltd., Hitachinaka, JP;
Tatsuo Matsumura, Higashimatsuyama, JP;
KNORR-BREMSE STEERING SYSTEM JAPAN LTD., Saitama, JP;
Abstract
A power steering apparatus includes a steering shaftincluding an input shaft, an intermediate shaftconnected through a first torsion barto the input shaft, and an output shaftconnected through a second torsion barto the intermediate shaft; a hollow motorto provide a rotational force to the intermediate shaft; and a control deviceincluding a microcomputer, and including an output shaft rotation angle presuming sectionto presume an output shaft rotation angle θg based on signals of an input shaft rotation angle θh and an intermediate shaft rotation angle θm, a torsion spring constant gand gof the first and second torsion bars; and a motor drive control sectionto control the hollow motor based on the output shaft rotation angle.