主权项 |
1. A valve timing controller disposed in a passage where a driving force is transmitted from a driving shaft to a driven shaft of an internal combustion engine to control a valve timing of a valve driven to open and close by the driven shaft, the valve timing controller comprising:
a housing rotatable with one of the driving shaft and the driven shaft; a vane rotor rotatable with the other of the driving shaft and the driven shaft, the vane rotor having a vane part that divides an interior space of the housing into a first oil pressure chamber on one side in a circumferential direction and a second oil pressure chamber on the other side in the circumferential direction; a valve body having a based cylindrical shape arranged coaxially with the vane rotor at a central part of the vane rotor, the valve body having a supply port to communicate with an external oil feed section, a first drain port to communicate with the first oil pressure chamber, and a second drain port to communicate with the second oil pressure chamber; and a spool movable in an axial direction inside of the valve body, the spool and the valve body defining a drain space, the spool opening the second drain port that is located adjacent to a bottom of the valve body than the first drain port is when discharging operation oil of the second oil pressure chamber to a drain oil passage which includes the drain space, wherein the supply port includes a supply recess recessed outward in a radial direction from an inner wall surface of a pipe part of the valve body, the second drain port includes a drain recess recessed outward in the radial direction from the inner wall surface of the pipe part, and a depth of the drain recess in the radial direction is smaller than a depth of the supply recess in the radial direction. |