Pulley assembly for controlling input shaft of accessory of internal combustion engine of e.g. car, has shaft and pulley that are connected with sun gear, planet carrier or ring gear, and maintains predetermined gear ratio

摘要

The pulley assembly (1) has main portion (2) that is rigidly connected to an engine housing of an internal combustion engine, and a pulley (3) that is rotatably relative to the main portion. A shaft is coupled to a planetary gear (4) in order to connect the shaft to the pulley. The shaft and the pulley are connected with the sun gear, planet carrier (18) or ring gear (C), and maintains predetermined gear ratio by elastic impact when a control group (6) for actuating clutch and changing gear ratio is deactivated.