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, 2004
Filed:
Mar. 10, 2003
Denso Corporation, Kariya, JP;
Abstract
A control system for an electric power steering apparatus detects calculation anomalies in a CPU regardless of the magnitude of a modified control quantity. The CPU has a basic control quantity calculating means for calculating a basic control quantity to drive a motor based on an output from a torque sensor, and a modified control quantity calculating means for calculating a modified control quantity corresponding to the steering conditions (for example, steering speed) of the steering wheel. The CPU-calculation monitoring unit has a first anomaly deciding means for deciding whether the calculation result of the basic control quantity calculating means is normal or anomalous in light of the output from the torque sensor, and a second anomaly deciding means for deciding whether the calculation result of the modified control quantity calculating means is normal or anomalous in light of the steering conditions. The motor is deactivated if anomalies are detected.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile