FAN DRIVE WITH IMPROVED VARIABLE SLIPPAGE CLUTCH UNIT FOR AN INTERNAL COMBUSTION ENGINE

摘要

A fan drive (2) for a working vehicle comprises a speed shift unit (4), and a fan (8) in series to the speed shift unit (4), wherein the speed shift unit (4) comprises a clutch unit (11) and is configured to discretely provide a first non-zero speed ratio (SR1) and a second non-zero speed ratio (SR2), the clutch unit (11) being configured to alternatively connect the first or the second non-zero speed ratios (SR1, SR2) to the fan (8).