| 摘要 |
The phase controller comprises an input member driven by the crankshaft, a drive hub adapted to be fixed to a first camshaft and an output member mounted to the drive hub so as to permit relative rotation between the output member. The input member and the drive hub, with the output member being adapted to drive a second camshaft. There is an actuator interposed between the input member, the drive hub and the output member controllably changes the rotational position of the drive hub with respect to the input member, as well as the rotational position of the output member with respect to the drive hub. A mechanism is capable of producing unequal phase changes between the drive hub and the crankshaft and between the output member and the crankshaft. This means that the phase change between a first camshaft and the crankshaft is not equal to the phase change between a second camshaft and the crankshaft. The input member is preferably driven by either a flexible inextensible member, such as a chain or belt, extending between the crankshaft and the sprocket or, alternatively, by a gear train extending between the crankshaft and the input member. |
