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1. (WO2018100909) HYDRAULIC CONTROL VALVE AND INTERNAL-COMBUSTION-ENGINE VALVE-TIMING CONTROL DEVICE

Pub. No.:    WO/2018/100909    International Application No.:    PCT/JP2017/037777
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Fri Oct 20 01:59:59 CEST 2017
IPC: F16K 11/07
F01L 1/356
F16K 3/26
Applicants: HITACHI AUTOMOTIVE SYSTEMS, LTD.
日立オートモティブシステムズ株式会社
Inventors: TAKADA, Yasuhide
▲高▼田 保英
Title: HYDRAULIC CONTROL VALVE AND INTERNAL-COMBUSTION-ENGINE VALVE-TIMING CONTROL DEVICE
Abstract:
In a hydraulic control valve 26, retard ports 32 that communicate with a retard passage hole 17 and advance ports 33 that communicate with an advance passage hole 18 are adjacently formed in a section of a shaft part 27c that is close to a head part 27b of a valve body 27. First and second oil passages 36, 37 are formed, along the axial direction, in an internal axial direction of a sleeve 28, and discharge holes 50e that communicate with the second oil passage are formed in a cylinder member 50. Drain holes 52e that communicate between the discharge holes and an oil pan are formed in a stopper member. Operating oil discharged from a retard working chamber and an advance working chamber is discharged from the second oil passage, the discharge holes, and the drain holes, via first and second cylindrical passages 41a, 41b. Accordingly, a reduction in overall size and weight can be achieved.