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:
Jun. 02, 1998
Filed:
Oct. 24, 1995
Eiichi Tomioka, Saitama, JP;
Jidosha Kiki Co., Ltd., Tokyo, JP;
Abstract
A vehicle power steering system for controlling an assist force which supplementally supports the steering operation, includes a motor for producing the assist force, a battery for supplying a current to the motor, a speed sensor for detecting a vehicle speed, a steering-wheel angle sensor for detecting an angle of a steering wheel, a circuit for adjusting the current fed from the battery to the motor according to the vehicle speed detected by the speed sensor and the angle of the steering-wheel detected by the steering-wheel angle sensor, a booster inserted in a current feed path to the motor for boosting a battery voltage of the battery to apply a boosted voltage to the motor. The vehicle power steering system further may include a boosted-voltage stabilizer for controlling the boosted voltage to a predetermined value through an operation of monitoring the boosted voltage. The vehicle power steering system further may include a boosted-voltage decreasing unit for decreasing the boosted voltage according to the drop rate of the battery voltage when the boosted-voltage decreasing unit detects that the boosted voltage is smaller than a first predetermined value through the operation of monitoring the voltage of the battery.