Patent ID: 6152088
Filing Date: 2000-11-28
Classification: F01P

Abstract:
Cooling system for a motor-vehicle internal combustion engine, comprising an engine block and a cylinder head, said system including:a first cooling circuit for the cylinder head, and a second cooling circuit for the engine block, which are separated from each other, each circuit having an inlet and an outlet,a radiator,first conduit means for feeding a cooling fluid coming out of the outlet of said first cooling circuit for the cylinder head to the radiator and from the radiator back to the inlet of the first cooling circuit for the head,a variable speed pump driven by an electric motor,said pump being interposed in said first conduit means for activating the circulation of the cooling fluid, andsecond conduit means for feeding a portion of the cooling fluid coming out of the pump towards the inlet of the second cooling circuit for the engine block, the outlet of said second circuit being connected to said first conduit means downstream of the outlet of said first cooling circuit,wherein said control means are electronic control means adapted to receive signals from a plurality of sensors indicative of more parameters of operation of the engine, andwherein said sensor means comprises one or more of the following sensors: a sensor of the rotational speed of the engine, a sensor of the engine load, a sensor of the ambient temperature, a sensor of the vehicle speed, and sensors of the temperature of the metal body of the engine and the fluid in the first cooling circuit, in the second cooling circuit and at the outlet of the first cooling circuit.