Motor vehicle internal combustion engine cooling system - has first cooling circuit boiling cooling fluid, and second cooling circuit including heat exchanger connected to vehicle lubricating circuit, pump, heater and control system

摘要

The engine cooling system includes the first cooling circuit (C1) in which the coolant liquid is brought to the boil. The second cooling circuit (C2) has a heat exchanger (2) connected to the lubrication circuit of the vehicle engine or gearbox. The second circuit includes the supply pump (7), the autonomous heater (4) to accelerate the rise in temperature of the cooling fluid, control valves (11,9) and the control system permitting the flow and temperature of the cooling fluid to be adapted as a function of several operating parameters of the engine. The control system is implemented with analogue or digital electronic circuits or with a microcontroller implementing a suitable algorithm. ADVANTAGE - Improved cooling efficiency while bringing engine up to operating temperature more quickly.