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Patent Searching and Data


Title:
DAMPING FORCE CONTROL VALVE AND SHOCK ABSORBER
Document Type and Number:
WIPO Patent Application WO/2013/122251
Kind Code:
A1
Abstract:
A damping force control valve (10) having improved damping force control characteristics during minute opening. The damping force control valve (10) comprises: a valve body (20) reciprocally moved by a solenoid (23); a first working fluid chamber (30) comprising a port (30a); and a second working fluid chamber (40) connected to a passage (21). The damping force is controlled by the degree of opening of a communications passage (52) that is the gap between an end surface (20a) of the valve body (20) and the port (30a). Variation of the cross-sectional area of the communications passage relative to the stroke of the valve (20), during minute opening, is reduced by forming a sloping section (20e) and an outer peripheral tapered section (20f), at a position lower than a closed section (50) of the valve body (20) being the position where the communications passage (52) is closed.

Inventors:
FUKUDA HIROMI (JP)
Application Number:
PCT/JP2013/053845
Publication Date:
August 22, 2013
Filing Date:
February 18, 2013
Export Citation:
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Assignee:
YAMAHA MOTOR CO LTD (JP)
International Classes:
F16F9/46; F16F9/34
Domestic Patent References:
WO2011078317A12011-06-30
Foreign References:
JPH0579527A1993-03-30
JP2012002336A2012-01-05
Attorney, Agent or Firm:
TASS MEISTER PATENT FIRM (JP)
Patent business corporation Tass meister international patent firm (JP)
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Claims: