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:
Dec. 16, 1997
Filed:
Sep. 21, 1995
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An electric power steering apparatus provides a steering assist of an electric motor directly to a vehicle steering system so as to reduce necessary steering power to be applied by a driver, and it is provided with a control unit including a phase compensation section implemented by software. The gain and phase of a steering torque signal from a steering torque sensor can be accurately set which correspond to the running and steering states of the vehicle, on the basis of a vehicle velocity signal from a vehicle velocity sensor. Thus, the gain in a high vehicle velocity condition and in such a frequency range outside the steering region can be controlled to substantially decrease so as to avoid parasitic oscillation and hence prevent the occurrence of magnetostrictive sound and hunting due to the parasitic oscillation. Accordingly, optimum steering feel can be achieved which corresponds to the states of the vehicle.