Ventilzeiteinstellmechanismus für Brennkraftmaschine.

摘要

A control mechanism for shifting the rotational phase transmitted from an engine, and for controlling the timing of the intake and exhaust valves. A first gear mechanism (17) integrally rotates with respect to a timing pulley (38), and has a set of inner peripheral gear teeth (17a). A second gear mechanism (16) integrally rotates with respect to a camshaft, and has a set of outer peripheral gear teeth. The number of gear teeth of the first gear mechanism (17) is greater than that of the second gear mechanism (16). This gear ratio generates a rotational phase shift of the timing pulley with respect to the camshaft, in order to vary the opening and closing timing of the intake and exhaust valves. A drive device drives the first gear mechanism in order to vary the phase shift and to control the opening and closing timing of the intake and exhaust valves in accordance with the operating state of the engine.