Title:
CONTROL VALVE DEVICE AND SHOCK ABSORBER
Document Type and Number:
WIPO Patent Application WO/2022/065279
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing: a damping force generation mechanism (control valve device) including a spring device that is provided with two change points of spring load characteristics, thereby achieving a high degree of freedom for adjusting the spring constant; and a shock absorber that satisfies, at a high level, the riding comfort, sound vibration performance, and steering stability of a vehicle. The present invention is a control valve device (damping force generation mechanism (31)) comprising: a housing (62) in which an opening through which working fluid passes is provided; a valve body (78) that is provided in the housing and that opens and closes the opening; a valve seat (79) which is provided in the opening and to which the valve body makes contact in a separable manner; an actuator (101) that moves the valve body in a direction toward the valve seat; and a spring device (120) that urges the valve body in a direction separating from the valve seat. The spring device has spring load characteristics defined into a first section, a second section, and a third section by two change points (C1, C2) along a direction from the side on which the valve body is separated from the valve seat toward the side on which the valve body approaches the valve seat.
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Inventors:
YAMAOKA FUMIYUKI (JP)
IZUMO KOSUKE (JP)
IZUMO KOSUKE (JP)
Application Number:
PCT/JP2021/034510
Publication Date:
March 31, 2022
Filing Date:
September 21, 2021
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
F16F9/34; B60G13/08; F16F1/32; F16F9/46; F16K31/06
Foreign References:
| JP2019015312A | 2019-01-31 |
Attorney, Agent or Firm:
YAMAMOTO, Osamu et al. (JP)
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