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:
Aug. 15, 2000
Filed:
Jul. 10, 1998
Yasuo Shimizu, Wako, JP;
Shigenori Takimoto, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
Variable gear ratio mechanism variably sets a ratio defining a pivot angle of steered wheels of the vehicle to a steering angle of a steering wheel of the vehicle. Electric motor applies an electric steering assist to the steering system of the vehicle. Steering torque sensor detects steering torque in the steering system. Control unit sets a target motor current on the basis of at least the steering torque detected by the steering torque sensor. Gear ratio detector detects the gear ratio set by the variable gear ratio mechanism. Thus, the control unit sets the target motor current on the basis of the gear ratio detected by the gear ratio detector in addition to the steering torque detected by the steering torque sensor. With this arrangement, the target motor current set by the control unit can reflect the currently-set gear ratio, with the result that the operating characteristics of the vehicle's steering system can be changed smoothly and continuously in response to every gear ratio change and an improved steering feel free of unsmoothness and friction is achieved.