For Air Cooling System

The air cooling system is widely used in refrigeration demotores aviation-type star. In automotive engines is little used, although there is a tendency to use it by some manufacturers.

The reason for this trend is the possibility to considerably improve the safe operation of engines at the same time as decreasing the need for careful conservation of the cooling system, since the water-cooled engines, nearly 20% of motor failures are attributed to defects in the cooling system. The cooling air is to create an air stream by a powerful fan, which is collected and channeled through a sort of shielding surrounding the organs for the cool, especially towards the top of the cylinders, the culassa and exhaust manifold, which are the parts that are subject to higher temperatures. The linchpin of a cooling system by air is the fan. This may be vane, which produces an air stream parallel to the axis of rotacção (axial) or centrifugal fans formed by a crown of reeds, in which air enters through the center and is pushed to the periphery, where it is collected by Umka surrounding housing and directed by pipes or shields for items to be cool. Operation of the fan can be made by direct Acrópolis the same end of the crankshaft or transmission belts and Poleas. In systems cooled by air requires good heat transmission parts air flow cooling For this to succeed, the cilindors culassa and build up separate, with the outer forming a series of fins to increase surface contcto with the air stream. As stated earlier, the biggest advantage of the cooling air is sensitivity of the system, which reduces the risk of breakdowns. The disadvantages are that you attribute the lack of regulation of operating temperature and increased engine noise due to the buzz of the fan and will no shirts of water, which somehow makes shock noise of the explosions.