Title:
HYDRAULIC OIL CONTROL VALVE AND VALVE TIMING ADJUSTER
Document Type and Number:
WIPO Patent Application WO/2021/193197
Kind Code:
A1
Abstract:
A hydraulic oil control valve (10) includes: a cylindrical sleeve (40) that has an opening at one end and a spring seat (42z) at the other end; a spool (50) that adjusts a supply destination of hydraulic oil in accordance with a positional relationship of the spool with the sleeve; an actuator (160) that comes into contact with the spool to drive the spool toward a spring seat-side end portion; and a spring (60) that is disposed on the spring seat of the sleeve and preloads the spool, wherein the sleeve is provided with, on an outer periphery of the spring seat-side end portion, a step portion (49) surrounding the spring seat and including a spool contact surface (49s) regulating the movement of the spool to the spring seat side, and, at the center of the spring seat, a raised portion (42r) raised toward the opening and having an inclined surface (42rc), the outer diameter of which decreases from the spring seat side to the opening side, the raised portion being configured such that an inner side of an end portion (60a1) of the spring comes into contact with an outer periphery of the raised portion when the spring is positioned on the spring seat side of the sleeve and the end portion is not disposed on the spring seat.
Inventors:
SUZUKI TOMONORI (JP)
KAWAMURA FUTOSHI (JP)
TAKAHASHI KINYA (JP)
KAWAMURA FUTOSHI (JP)
TAKAHASHI KINYA (JP)
Application Number:
PCT/JP2021/010373
Publication Date:
September 30, 2021
Filing Date:
March 15, 2021
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
F16K27/04; F01L1/356
Domestic Patent References:
| WO2017115739A1 | 2017-07-06 | |||
| WO2015029476A1 | 2015-03-05 |
Foreign References:
| JP2003074728A | 2003-03-12 |
Attorney, Agent or Firm:
TOKKYO GYOMUHOJIN MEISEI INTERNATIONAL PATENT FIRM (JP)
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