How does the engine cooling system work?

1. Liquid cooling circulates liquid through pipes and passages in the engine. When the liquid flows through the high-temperature engine, it absorbs heat, thereby reducing the temperature of the engine. After the liquid flows through the engine, it then flows to the heat exchanger (or radiator), and the heat in the liquid is dissipated into the air through the heat exchanger;

2. Air-cooling: Some early cars used air-cooling technology, but modern cars almost do not use this method. This cooling method does not circulate liquid in the engine, but dissipates heat from the cylinder through aluminum sheets attached to the surface of the engine block;

3. A powerful fan blows air to these aluminum sheets to dissipate heat into the air to achieve the purpose of cooling the engine. Duct System The cooling system in a car has a lot of pipes in it because most cars are liquid cooled.

The gas temperature in the cylinder can be as high as 1727~2527C. If not cooled in time, the temperature of the engine parts will be too high, especially the parts that are in direct contact with high-temperature gas. The normal fitting clearance will be affected by thermal expansion, causing the moving parts to be blocked or even Stuck. In addition, high temperature will also cause the mechanical strength of engine parts to decrease, causing the lubricating oil to lose its effectiveness.

The cooling system can be divided into air cooling and water cooling according to different cooling media. If the heat of high-temperature parts in the engine is directly dissipated into the atmosphere for cooling, it is called an air cooling system. The device that transfers this heat to cooling water first and then dissipates it into the atmosphere for cooling is called a water cooling system. Because the water-cooling system has uniform cooling, good effects, and low engine operating noise, water-cooling systems are currently widely used in automobile engines.

Post time: Jan-23-2024