ENGINE COMPRISING A SYSTEM FOR COOLING THE COOLANT USING FUEL

The invention relates to an internal combustion engine (10), comprising at least: - a fuel supply circuit (12) for supplying the engine (10) with fuel, said supply circuit (12) comprising at least one fuel tank (14) to which is associated a priming pump (16), fuel filtering means (18), a high-pressure pump (26) and a sensor (30) for measuring fuel temperature; - a cooling circuit (50) of the engine (10) by circulation of at least one cooling liquid, said cooling circuit (50) comprising at least one pump (58) and a sensor (80) for measuring the temperature of the cooling liquid, characterized in that the engine (10) comprises an additional cooling system (82) for selectively cooling the cooling liquid through at least one heat exchanger (84) by means of fuel. The invention also relates to a vehicle comprising such an engine.