| 摘要 |
A valve timing control for an internal combustion engine controls an angular phase difference between a crank shaft of the engine and a cam shaft, preferably an exhaust cam shaft, of the engine. A rotor (30) is fixed on the cam shaft (10). A housing member (50) is rotatably mounted on the cam shaft (10) so as to surround the rotor (30). A chamber (R0) is defined between the housing member (50) and the rotor (30) and has a pair of circumferentially opposed walls (55,56), a vane (40) extending radially outwardly from the rotor (30) into the chamber (R0) dividing the chamber (R0) into a first pressure chamber (R1) and a second pressure chamber (R2). A fluid supplying means (100) supplies fluid under pressure to at least a selected one of the first pressure chamber (R1) and the second pressure chamber (R2), to effect relative rotation between the rotor (30) and the housing member (50) so as to control the valve timing. According to the invention a coil spring (92) biases the rotor (30) in the advanced direction and the coil spring (92) is guided by a sensor plate (20) fixed to one end of the cam shaft (10). |
