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:
Jul. 29, 1997
Filed:
Aug. 11, 1995
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In a electric power steering controller, an output signal of motor driving direction discrimination means is compared with a driving direction discrimination processing result to detect a failure of the motor driving direction discriminator in accordance with the comparison result, so as to prevent the runaway of a motor supplying steering force to a steering wheel. The following are included: a motor for supplying a steering force to a steering wheel, a steering torque detector for detecting the steering force from the steering wheel, a motor control for drive-controlling the motor rightward or leftward in accordance with the output of the steering torque detector, a motor driving direction discrimination means for outputting a motor right- or left-direction discriminating signal in accordance with the value of the output of the steering torque discriminator, and a microcomputer 8 for determining the vicinity of a neutral point of steering torque and judging whether the motor driving direction discriminator or has failed in accordance with a judgment result of a signal output from the motor driving direction discriminator when the vicinity of the neutral point is discriminated.