Title:
DAMPING FORCE ADJUSTMENT TYPE SHOCK ABSORBER
Document Type and Number:
WIPO Patent Application WO/2020/246315
Kind Code:
A1
Abstract:
In an ultra-low velocity region of piston velocity in a contraction stroke in a soft mode, communication between a cylinder upper chamber and a reservoir is shut off by means of an ultra-low velocity valve (low velocity valve mechanism) disposed in a pilot passage. By this means, liquid oil in the cylinder upper chamber can be caused to expand in the ultra-low velocity region of the contraction stroke, and a differential pressure is generated between the cylinder upper chamber side and a cylinder lower chamber side of the contraction side ultra-low velocity valve. As a result, the contraction side ultra-low velocity valve opens in the ultra-low velocity region, and a valve characteristic damping force due to the ultra-low velocity valve can be generated.
Inventors:
IIDA TOMOHIKO (JP)
KADOKURA KOSUKE (JP)
MONJI KENTO (JP)
MORI SHUNSUKE (JP)
KADOKURA KOSUKE (JP)
MONJI KENTO (JP)
MORI SHUNSUKE (JP)
Application Number:
PCT/JP2020/020746
Publication Date:
December 10, 2020
Filing Date:
May 26, 2020
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F16F9/32; F16F9/348; F16F9/46; F16F9/508
Foreign References:
| JP2019027460A | 2019-02-21 | |||
| JP2016512316A | 2016-04-25 | |||
| JP2016065559A | 2016-04-28 | |||
| JP3285302B2 | 2002-05-27 |
Attorney, Agent or Firm:
YAMAMOTO, Osamu et al. (JP)
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