The combustion of fuel in the engine generates heat which must be dissipated via the cooling system. The cooling circuit gets rid of engine heat by means of the radiator. The cooling system must also be designed to allow the engine to warm up as quickly as possible after a cold start.
For commercial cars, liquid engine cooling has become the most accepted system. Only with the help of "water cooling" can we further improve the cleanliness of exhaust gas, reduce fuel consumption, increase engine life and reduce noise for enhanced comfort and environmental protection.