Patent ID: 6883470

Claim:
An engine cooling system, comprising: an engine body including a coolant passageway; a coolant pump disposed in an inlet portion of said coolant passageway of said engine body; a radiator dissipating heat of said engine body that is absorbed by coolant to atmosphere; a thermostat disposed between said radiator and said coolant pump, said thermostat regulating coolant circulation from said radiator to said coolant pump; a heater disposed between an outlet portion of said coolant passageway of said engine body and said coolant pump such that temperature of the coolant passing through said heater does not affect operation of said thermostat; and a throttle body disposed between an outlet portion of said coolant passageway of said engine body and said thermostat such that said coolant circulates from said engine body to said coolant pump by way of said throttle body and said thermostat, wherein said thermostat is responsive only to coolant circulating from said throttle body when said thermostat is in a closed position and at least partially responsive to coolant circulating from both said radiator and said throttle body when said thermostat is at least partially open.