Ventilation system for a motor vehicle

摘要

A ventilation assembly for a motor vehicle comprising first and second motor fan units (1, 2) and a control device (5) adapted to vary the ventilation power (P1+2) developed by the assembly formed by the two motor fan units according to a desired total power value (PTC). The control device (5) comprises an electric power variator (7) with continuous power variation, connected to the first motor fan unit (1), and a means for cutting-off the supply of the second motor fan unit (2), the power (P2) developed by the said second motor fan unit (2) being either zero or equal to its maximum operating power (PM2).