Patent ID: 11939892
Assignee: DENSO CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 6:
7. 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, and
the filter unit is arranged between the driven rotating body and the camshaft to increase a friction coefficient, and the filter unit directly contacts the driven rotating body on one side of the filter unit in the axial direction and the filter unit directly contacts the camshaft on an opposite side of the filter unit in the axial direction.