Patent ID: 6470838
Filing Date: 2002-10-29
Classification: F01P

Abstract:
A device for regulating the cooling of a motor-vehicle internal-combustion engine comprising a cooling circuit carrying a fluid driven by a pump, said circuit comprising a cooling branch containing a cooling radiator associated with a motor-driven fan unit, as well as a heating branch containing an air heater, wherein the pump and motor-driven fan unit are each actuated by a variable-speed electric motor, and which comprises:first means for establishing a hot-starting state of the engine as a function of chosen conditions; and second means, active in said hot-starting state, for controlling the speed of the pump and the speed of the motor-driven fan unit as a function of a first magnitude representative of the temperature of the fluid and of a second magnitude representative of the heating demand, wherein said second means further controls the speed of the pump and the motor-driven fan unit based on speed of the engine and load on the engine.