Patent ID: 6443105
Filing Date: 2002-09-03
Classification: F01P

Abstract:
A radiator fan controller for actuating a radiator fan of a water-cooled engine of a vehicle to control engine coolant and engine compartment temperatures, comprising:coolant temperature determining means for comparing said engine coolant temperature (Tw) with a predetermined coolant temperature level (TWS) and for determining a low coolant temperature condition of engine coolant when said coolant temperature is lower than said predetermined coolant temperature level; vehicle speed determining means for comparing vehicle speed (VSP) with a predetermined speed level (VSPS) and for determining a low vehicle speed condition when said vehicle speed is lower than said predetermined speed level; engine compartment temperature determining means for comparing an engine compartment temperature (Ta) with a predetermined compartment temperature (TAS) and for determining a high temperature condition of said engine compartment when said engine compartment temperature is higher than said predetermined compartment temperature; and engine compartment scavenging means for scavenging said engine compartment by actuating said radiator fan when said engine compartment temperature determining means determines said high temperature condition, said vehicle speed determining means determines said low vehicle speed condition and said coolant temperature determining means determine said low coolant temperature condition.