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:
Nov. 19, 2013
Filed:
Apr. 14, 2011
Teruyuki Ohnishi, Atsugi, JP;
Hajime Komuro, Atsugi, JP;
Kohtaro Shiino, Isehara, JP;
Hitachi Automotive Systems Steering, Ltd, Hiki-gun, JP;
Abstract
A power steering apparatus including a steering shaft, a sensor coil disposed on an outer circumferential side of the steering shaft and detecting a change in impedance value to determine an amount of relative rotation of an input shaft and an output shaft of the steering shaft, a steering housing including a first housing and a second housing, a sensor substrate disposed on the first housing, a neutral point regulating circuit on the sensor substrate which includes a resistor connected to the sensor coil and variably regulates a resistance value of the resistor so as to regulate the impedance value at a neutral point at which the amount of relative rotation of the input shaft and the output shaft is zero, and an electric motor which is driven and controlled in accordance with an output signal of the sensor coil regulated by the neutral point regulating circuit.