At present, the cooling of automobile engine is widely used in water-cooled type. The heat of the engine high temperature components is passed through the cylinder sleeve and the cylinder head to the cooling water in the surrounding jacket, and the heat absorbed by the cooling water is dispersed in the atmosphere. When the engine is working normally, the water temperature should be kept in 80 or so.Cooling System
At present the automobile engine uses the forced circulation water cooling system more. The engine cylinder head and the cylinder body are all water sets. The water pump draws the cooling water from outside the machine to pressurize, causes the cold water to flow inside the sleeve, takes away the heat of the neighboring parts. Cooling water after heat absorption of its own temperature rise into the front of the car radiator (water tank) inside. As the car advances and fan suction, the external cold air through the radiator, take away the heat of cooling water in the radiator and into the atmosphere. When the cooling water in the radiator is cooled, the water pump is once again under the action of the coolant. This cycle cools the engine's high-temperature components.Cooling System
The radiator is located on the front of the car (individual at the rear) when the car is moving forward, and the upper and lower ends have a water storage chamber, which is connected with many fine cooling tubes. Most of the cooling pipes adopt flat circular sections. In order to enhance the cooling effect, a lot of metal heat sinks are arranged on the cooling pipe jacket to increase the heat dissipation area and the heat sink's stiffness and strength. Components consisting of cooling pipes and fins are called radiator cores. The structure described above is called segment type radiator core.
Another widely used is the tube-type radiator core, which is formed by the corrugated dispersed tropics and the cooling pipes. A small fin with disturbed airflow on the radiating belt to increase heat dissipation: force. Because this form of heat dissipation effect is good, easy to manufacture, small quality, it is widely used. The disadvantage is that the structural strength is inferior to the segment type.Cooling System
The requirement of the radiator core is good thermal conductivity of the materials used, usually made of brass sheet. In order to save copper, aluminum radiator core has great development prospects. It's now used in premium cars and cars.