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Patent Searching and Data


Title:
POWER STEERING DEVICE
Document Type and Number:
Japanese Patent JP3681315
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a power steering device capable of smoothing a pulsation oil pressure component supplied to a power cylinder to obtain excellent steering feeling and preventing generation of a noise and the like.
SOLUTION: This power steering device comprising the power cylinder S for generating steering auxiliary force operated by pressure oil supplied from a hydraulic pump P driven by an electric motor M is provided with a frequency matching means for matching frequency of pulsation torque component generated by the electric motor M and the pulsation oil pressure component generated by the hydraulic pump P, and also provided with a phase-shifting means for shifting phase of the pulsation torque component generated by the electric motor M or of the pulsation oil pressure component generated by the hydraulic pump P.


Inventors:
Futoshi Morimura
Kazuhiko Fujita
Application Number:
JP2000010997A
Publication Date:
August 10, 2005
Filing Date:
January 19, 2000
Export Citation:
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Assignee:
Koyo Seiko Co., Ltd.
International Classes:
B62D6/00; B62D5/07; F04C2/18; F04C14/00; (IPC1-7): B62D6/00; B62D5/07
Domestic Patent References:
JP6278621A
JP57070975A
JP200190669A
JP1137063A
JP10159743A
JP579465A
JP10318160A
JP740851A
JP6278621A
JP5770975A
JP54113501A
JP1082377A
Attorney, Agent or Firm:
Nobuo Kono