Unlike water, antifreeze does not freeze down to -40 C to 65 C and the temperature of its boiling point above, as well as antifreeze has anticorrosive and lubricating properties. As stated above, the main task of the cooling system – cooling the engine. This is so but not quite. To be more precise – to maintain engine operating temperature, which is 90 – 110 C. After the initial phase of work, especially in winter, and the engine should be warmed. The main working element of the system Cooling is antifreeze.
Therefore, we consider liquid cooling system. Previously, as the fluid in the system flooded with water. It was not very convenient. In winter, long before parking the car in the cold water had to be drained from the system. Besides boiling point of water is low. As you know, when boiling liquid engine stops because it can overheat and malfunction.
In modern systems, engine cooling used antifreeze or antifreeze. This – a mixture of water and specialty chemicals – ethylene glycol. Freezing temperature of liquids up to – 40 C to 65 C. In addition, they have higher boiling point. Antifreeze in its composition have also lubricating and anticorrosive additives. there are still old), which is constantly rotating. The basic units of the cooling system – it is cooler and the so-called cooling jacket. Cooling jacket – it's a whole network of canals in engine. They, like a shirt, really wrap the engine cylinders. The fluid that circulates through these channels, assigns the operations of the engine heat from the cylinders. As you already know, the hottest parts of the engine – it's cylinders. Still, after they burned the working mixture, while stressing a lot of heat. Here are their what needs to be cooled in the first place. More fluid bathes all the other heated parts, which give it its warm. Hot coolant fluid through the hose goes into the radiator. The radiator consists of two containers – the top and bottom tanks, between which there is a lot of fine tubules. Liquid stream is divided into many streams, pass on these ducts and cooled. Heat through the thin walls of the tubes goes into the environment. The radiator is usually located in front of the car and intensively blown counter flow of air. If this flow is not enough, then comes to help a fan behind the radiator. Upon reaching the engine temperature limit special sensor includes a fan that blows a radiator, cooling liquid. Temperature liquid drops and the fan is turned off. The cooled liquid enters the water pump – full circle. But if you remember at the beginning of the story of the cooling system, we have focused on the fact that the cooling system not only cools the engine. To cool the engine warmed up quickly, a special device – the thermostat closes the fluid path to the radiator and opens it only when the engine reaches its operating temperature.