Valve timing control devices

摘要

A valve timing control device (30) has a rotor (64) fixed on a cam shaft (34) of an engine and a housing (50) rotatably mounted on the cam shaft (34). The housing (50) surrounds the rotor (34). A chamber (60) between the housing (50) and the rotor (64) has a pair of circumferentially opposed walls (60a,60b). A vane (68) is mounted on the rotor (64) and extends outwardly therefrom in the radial direction into the chamber (60) so as to divide the chamber (60) into a first pressure chamber (76) and a second pressure chamber (78). A plate spring (74) between the rotor (64) and the vane (68) and a fluid supply means (91) supplies at least a selected one of the first pressure chamber (76) and the second pressure chamber (78).