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AssigneeJtekt Corporation
InventorsKatsutoshi Nishizaki, Shirou Nakano, Ken Matsubara, Toshiaki Oya, Yasuhiro Kamatani, Masahiko Sakamaki, Yoshikazu Kuroumaru, Shigeki Nagase, Takayasu Yamazaki, Yasuhiro Saitou, Takeshi Ueda
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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 (213) for controlling a steering assist motor (9) 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 (9) 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 (213).
An electric power steering system for providing a steering assist by applying a power of a steering assist motor to a steering mechanism, comprising:
An electric power steering system, comprising
Dependencies are inferred from the claim text.