US 11,834,971 B2
Hydraulic oil control valve and valve timing adjusting device
Futoshi Kawamura, Kariya (JP); and Kinya Takahashi, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Sep. 23, 2021, as Appl. No. 17/483,649.
Application 17/483,649 is a continuation of application No. PCT/JP2020/010010, filed on Mar. 9, 2020.
Claims priority of application No. 2019-055926 (JP), filed on Mar. 25, 2019.
Prior Publication US 2022/0010699 A1, Jan. 13, 2022
Int. Cl. F01L 1/344 (2006.01); F16K 11/07 (2006.01); F16K 27/04 (2006.01)
CPC F01L 1/3442 (2013.01) [F16K 11/07 (2013.01); F16K 27/041 (2013.01); F01L 2001/34426 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A hydraulic oil control valve configured to control flow of a hydraulic oil supplied from a hydraulic oil supply source and to be placed along a rotational axis of a valve timing adjusting device, wherein the valve timing adjusting device is fixed to an end portion of one of a drive shaft and a driven shaft to adjust a valve timing of another valve, and the driven shaft receives a drive force from the drive shaft to open and close the another valve, the hydraulic oil control valve comprising:
a sleeve that is shaped in a tubular form; and
a spool that is configured to be driven by an actuator such that the spool slides in an axial direction at a location that is on an inner side of the sleeve in a radial direction while the actuator contacts one end of the spool, wherein:
the sleeve includes:
an inner sleeve that is placed on an outer side of the spool in the radial direction and has an opening formed at an end portion of the inner sleeve which is opposite to the actuator in the axial direction, wherein a distal end portion of the spool is inserted in the opening of the inner sleeve; and
an outer sleeve that has an axial hole which extends in the axial direction, wherein the inner sleeve is inserted in at least a portion of the axial hole;
an end portion of the inner sleeve, which is located on a side where the driven shaft is placed, contacts a movement limiting portion of the outer sleeve in the axial direction; and
in a state where the spool is positioned farthest from the actuator, the distal end portion projects from the opening and the movement limiting portion toward a side that is opposite to the actuator.