Title:
HYDRAULIC CONTROL VALVE AND VALVE TIMING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2019/049810
Kind Code:
A1
Abstract:
Provided is a valve timing control device for an internal combustion engine. A phase change mechanism 3 is provided with: a valve body 27 which includes a tubular peripheral wall, and a supply port 32, a retard angle port 33, and an advance angle port 34 which are formed radially penetrating through the peripheral wall; a spool valve 28 which is slidably arranged on the inside of the peripheral wall, and which opens and closes the ports in accordance with a moved position; and percolation filters 53 to 55 which are wound around the respective ports, and which include a plurality of circular mesh holes 53a to 55a each of which is set to a circumferential length L of not less than 1.07 mm at a hole edge thereof and to a hole diameter D of not less than 0.34 mm. In this way, it becomes possible to suppress the generation of an oil film in each mesh hole, thereby suppressing unwanted unlocking.
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Inventors:
SAKAGUCHI SHOKI (JP)
Application Number:
PCT/JP2018/032530
Publication Date:
March 14, 2019
Filing Date:
September 03, 2018
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F01L1/356
Foreign References:
| JP2014025518A | 2014-02-06 | |||
| JP2007321953A | 2007-12-13 | |||
| JP2015081680A | 2015-04-27 | |||
| JP2017003041A | 2017-01-05 | |||
| JP2015102150A | 2015-06-04 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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