Expanding pulley C.T.V. for motor vehicle

摘要

The transmission (2) has two adjustable sheaves (3,4) receiving an endless belt (5). The sheaves are each controlled by a hydraulic adjusting cylinder (6,7). The adjusting cylinders receive pressurised fluid from a pump (14). The fluid pressure and thus the extent of frictional clamping engagement between the sheaves and the belt is regulated by a torque sensor (16). The sensor includes a plenum chamber (27) with an outlet (35) having a variable cross-sectional area which depends on torque variations from the vehicle engine.