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Title:
POWER STEERING DEVICE
Document Type and Number:
Japanese Patent JP2004224185
Kind Code:
A
Abstract:

To provide a power steering device capable of suppressing generation of a high pump friction of the working oil at the time of operation in one direction after a temporary stop of an oil pump.

A first 13 and a second exhaust passage 14 having communication to a reservoir 12 at the atmospheric pressure are branched on the way of a first 8 and a second passage 9, and a first 15 and a second passage selector valve 16 are installed at the branching parts. When the oil pump 11 is actuated and the oil pressure is discharged to the second passage 9, the passage selector valves put the two passages in communication and shut the exhaust passages, and when the oil pump is stopped working, the cylinder side passage part 8b of the first passage is put in communication with the first exhaust passage 13.


Inventors:
Otaki, Mizuo
Kurata, Masakazu
Application Number:
JP2003000014153
Publication Date:
August 12, 2004
Filing Date:
January 23, 2003
Export Citation:
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Assignee:
HITACHI UNISIA AUTOMOTIVE LTD
International Classes:
B62D5/07; B62D5/06; B62D5/065; F15B7/00; (IPC1-7): B62D5/07
Attorney, Agent or Firm:
橋本 剛
小林 博通
富岡 潔



 
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