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:
Oct. 20, 2009
Filed:
May. 09, 2005
Katsutoshi Nishizaki, Nabari, JP;
Shirou Nakano, Minamikawachi-Gun, JP;
Ken Matsubara, Matsubara, JP;
Toshiaki Oya, Sakai, JP;
Yasuhiro Kamatani, Kitakatsuragi-gun, JP;
Masahiko Sakamaki, Okazaki, JP;
Yoshikazu Kuroumaru, Kashihara, JP;
Shigeki Nagase, Nabari, JP;
Takayasu Yamazaki, Souraku-gun, JP;
Yasuhiro Saitou, Kashiwara, JP;
Takeshi Ueda, Yamatokooriyama, JP;
Katsutoshi Nishizaki, Nabari, JP;
Shirou Nakano, Minamikawachi-Gun, JP;
Ken Matsubara, Matsubara, JP;
Toshiaki Oya, Sakai, JP;
Yasuhiro Kamatani, Kitakatsuragi-gun, JP;
Masahiko Sakamaki, Okazaki, JP;
Yoshikazu Kuroumaru, Kashihara, JP;
Shigeki Nagase, Nabari, JP;
Takayasu Yamazaki, Souraku-gun, JP;
Yasuhiro Saitou, Kashiwara, JP;
Takeshi Ueda, Yamatokooriyama, JP;
JTEKT Corporation, Osaka-Shi, JP;
Abstract
An electric power steering system is provided which is capable of providing a favorable steering feeling without using compensation logics such as of inertia compensation and friction compensation. The electric power steering system includes road-noise suppression control means () for controlling a steering assist motor () in a manner to damp torque transmission in a higher frequency region representing road noises than a frequency region representing road information. A friction value of a steering mechanism (A) is decreased enough to allow the intrinsic vibrations of the steering mechanism (A) to appear. Rotor inertia of the steering assist motor () is set to a value small enough to allow the frequencies of the intrinsic vibrations to be present in the frequency region where the torque transmission is damped by the road-noise suppression control means ().