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Title:
DAMPING FORCE ADJUSTABLE SHOCK ABSORBER
Document Type and Number:
WIPO Patent Application WO/2020/195264
Kind Code:
A1
Abstract:
This shock absorber is provided with a flow path (an oil path of a piston) in which a work fluid flows with movement of the piston rod, and a damping force adjustable valve which is disposed in the flow path and in which the opening/closing action is adjusted by a solenoid. In the flow path, in series with the damping force adjustable valve, a frequency sensitive mechanism is provided which reduces the damping force for high-frequency vibration. In the frequency sensitive mechanism, a second valve mechanism (a compression-side damping force generating valve and an expansion-side damping force generating valve) is provided which exerts resistance to the flow of the work fluid from an upstream-side chamber (an upper chamber or a lower chamber) to a downstream-side chamber (the lower chamber or the upper chamber).

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Inventors:
YAMASHITA MIKIO (JP)
Application Number:
JP2020/005267
Publication Date:
October 01, 2020
Filing Date:
February 12, 2020
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
B60G17/015; F16F9/19; F16F9/32; F16F9/46; F16F9/508
Domestic Patent References:
WO2018168865A12018-09-20
Foreign References:
JP2018105378A2018-07-05
JP2009264558A2009-11-12
Attorney, Agent or Firm:
ONO, Shinjiro et al. (JP)
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