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Nội dung: <blockquote data-quote="HuyNam" data-source="post: 128298">COOLING SYTEMTài liệu<a href="https://www.mediafire.com/?tj8wlbhm3w0b73v" target="_blank">COLING SYTEM</a>Nguồn: khoa hang2 hảiAll internal combustion engines produce heat as a byproduct of combustion and friction. This heat can reach temperatures up to 1925°C (3500°F) and can have catastrophic affects on engine components. Pistons, valves and cylinder heads  must be cooled to reduce the risk of detonation. Cylinder temperatures need to be controlled so lubricating oil can maintain a protective film on the cylinder surfaces and the lubricating oil should be cooled to ensure its integrity. In addition to overheating, overcooling can have negative effects on the engine. Overcooling can reduce engine performance and shorten the engine’s service life. Cooling systems are used to manage engine heat. Cooling systems must be properly designed, operated and maintained for proper engine operation and service life. This guide describes and explains methods of managing engine heat for various engine applications.When the engine is cold, the temperature regulators bypass the radiator and direct the coolant back  to the water pump. As the temperature of the bypass coolant flow becomes warmer, the temperature regulators begin to open and permit some of  the coolant to flow to the radiator. The regulator opens to maintain the correct engine temperature. The amount that the regulator opens and the percent of coolant flow to the radiator depends on the load on the engine, and the outside air temperature. The fan pushes or pulls air through  the radiator and around the tubes that extend from the top to the bottom of the radiator. When the hot coolant goes through the tubes in the radiator, the flow of air around the tubes lowers the temperature of the coolant. The coolant then flows back through the water pump. Coolant expands as it is heated. Expansion tanks are used on some applications to contain the increased volume.</blockquote>

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