Patent ID: 6125798
Filing Date: 2000-10-03
Classification: F01P,H03K

Abstract:
A motor vehicle cooling system, comprising:an electric motor supplied with electrical power from a vehicle-mounted battery and driven only at a predetermined speed;a fan, driven by the electric motor, to blow cooling air through a vehicle-mounted heat exchanger;a MOS transistor disposed in a power-supply line between the battery and the electric motor, to drive the electric motor; anda lag circuit to delay a rise in voltage applied at a gate of the MOS transistor from the battery and thereby reduce a surge current of the electric motor during starting of the electric motor, said MOS transistor in an off state when said voltage supplied from said lag circuit to said gate is below a predetermined level, said MOS transistor in an on state when said voltage supplied from said lag circuit to said gate is above a predetermined level.