Valve timing control devices

摘要

A valve timing control device (30) includes a rotor (68) fixed on a cam shaft (34). A housing (50) is rotatably mounted on the cam shaft (34) so as to surround the rotor (68). A chamber (60) between the housing (50) and the rotor (68) has a pair of circumferentially opposed walls (50b1, 50b2). A vane (74) mounted on the rotor (68) extends outwardly therefrom in the radial direction into the chamber (60) to divide the chamber (60) into a first pressure chamber (80) and a second pressure chamber (82). A device (92,98,94) supplies fluid under pressure to at least a selected one of the first pressure chamber (80) and the second pressure chamber (82). A locking mechanism (104) connects the housing (50) and the rotor (68). A device (66,106) cancels the locking mechanism (104) and keeps the locking mechanism (104) cancelled by the fluid pressure from the supplying device (92,98,94).