| 摘要 |
Device for driving a cooling fan (60) of a combustion engine (10), comprising a gear between the cooling fan and a driving shaft (12) of the engine. The gear is a hydrodynamic gear (30) of the type which comprises fixed guide vanes (34) and is adapted to responding to a lower engine speed at a lower load on the fan by providing a step-up gear ratio between the driving shaft (12) and the fan (60) and to responding to a higher engine speed at a higher load on the fan by applying slippage to reduce the gear ratio between the driveshaft and the fan. |
