Moottorijäähdytin

Moottorijäähdytin, commonly known as a radiator in English, is a crucial component of an internal combustion engine's cooling system. Its primary function is to dissipate heat generated by the engine during operation, preventing it from overheating. The radiator is typically located at the front of the vehicle, where it can receive maximum airflow.

The cooling system works by circulating a coolant, usually a mixture of water and antifreeze, through the engine block. This coolant absorbs the heat produced by combustion. The hot coolant then flows to the radiator, which consists of a network of thin tubes and fins. As air passes over the fins, heat is transferred from the coolant to the air, thus cooling the coolant. The cooled coolant then returns to the engine to repeat the cycle.

Radiators are usually made of aluminum or copper, materials known for their excellent heat conductivity. The fins increase the surface area of the radiator, enhancing the efficiency of heat transfer. Many modern vehicles also employ an electric fan, which can be activated when the vehicle is stationary or moving at low speeds, to ensure adequate airflow through the radiator. Proper maintenance of the cooling system, including regular checks of coolant levels and the condition of the radiator and hoses, is essential for optimal engine performance and longevity.