Title:
CONTROL CIRCUIT FOR STEERING SURFACE DRIVING ACTUATOR
Document Type and Number:
Japanese Patent JP3729938
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a dumper function in an actuator so as to effectively prevent steering surface fluttering by connecting, when electric obstruction occurs, the output port of a pressure reducing valve with the input port of an accumulator, and providing an orifice between the two chambers of the actuator.
SOLUTION: When an orifice 33c is provided in 33 and a middle position is reached, a second control valve communicates first and second ports 33a and 33b via this orifice 33c. When a steering input is for a forward direction, a first control valve 32 connected first and third ports 32a and 32c to each other and second and fourth ports 32b and 32d to each other. When a load of a direction reverse to the steering input is applied to the piston 14 of an actuator 11, hydraulic oil pushed out from a chamber 15 is returned to the right chamber 16 of the actuator 11. Because of the existence of the orifice in a route, the hydraulic oil is not smoothly moved and the actuator 11 functions as a dumper.
Inventors:
Toshio Kamimura
Koji Ito
Koji Ito
Application Number:
JP17759596A
Publication Date:
December 21, 2005
Filing Date:
July 08, 1996
Export Citation:
Assignee:
Nabtesco Co., Ltd.
International Classes:
B64C13/00; B64C13/16; B64C13/42; F15B20/00; (IPC1-7): B64C13/16; B64C13/00; B64C13/42; F15B20/00
Domestic Patent References:
| JP9144713A | ||||
| JP4215595A | ||||
| JP6144385A | ||||
| JP6298187A |
Attorney, Agent or Firm:
Gunichiro Ariga
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