US 11,939,892 B2
Valve timing adjustment device
Takahito Kamiya, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Mar. 8, 2021, as Appl. No. 17/194,801.
Application 17/194,801 is a continuation of application No. PCT/JP2019/034215, filed on Aug. 30, 2019.
Claims priority of application No. 2018-168606 (JP), filed on Sep. 10, 2018.
Prior Publication US 2021/0189923 A1, Jun. 24, 2021
Int. Cl. F01M 1/10 (2006.01); F01L 1/344 (2006.01); F01L 1/352 (2006.01); F01M 1/06 (2006.01)
CPC F01M 1/10 (2013.01) [F01L 1/344 (2013.01); F01L 1/352 (2013.01); F01M 1/06 (2013.01); F01L 2810/02 (2013.01); F01M 2001/064 (2013.01); F01M 2001/105 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A valve timing adjustment device configured to adjust valve timing of a valve that is driven to open or close by a camshaft to which an engine torque is transmitted from a crankshaft in an internal combustion engine, the valve timing adjustment device comprising:
a driving rotating body that rotates in conjunction with the crankshaft;
a driven rotating body that rotates in conjunction with the camshaft;
a reduction mechanism configured to change a relative rotation phase of the driving rotating body and the driven rotating body by a driving force of an actuator, the reduction mechanism including
an internal gear portion having internal teeth formed inward in a radial direction, and
an external gear portion having external teeth formed outward in the radial direction to mesh with the internal teeth; and
a filter unit capable of capturing a foreign matter contained in lubricating fluid supplied into the reduction mechanism, wherein
the driven rotating body has a supply hole penetrating in an axial direction to supply the lubricating fluid into the reduction mechanism through the camshaft,
the filter unit has a plurality of holes penetrating in the axial direction, and the plurality of holes are arranged in a flow path for the lubricating fluid connected to the supply hole,
the filter unit is provided on a spacer configured to adjust a gap inside the reduction mechanism in the axial direction; and
the filter unit directly contacts the reduction mechanism and the driven rotating body.