As one of the six systems of automobile engine, engine cooling system plays an important role. It can not only protect the engine from damage caused by high temperature, but also improve fuel economy and reduce emissions. In order to help you better understand the engine cooling system, today's engine special knowledge, pickup China Xiaobian will introduce the relevant knowledge of automotive engine cooling system.

The function of automotive engine cooling system is to take away the heat generated by engine combustion and keep the engine in the normal operating temperature range. In all cases, to ensure that the engine works at the most suitable temperature, the matching and setting of cooling system will directly affect the engine's power performance, service life and fuel economy. The data show that the failure rate of automobile cooling system is the highest among all automobile failures.

The cooling system of a liquid-cooled vehicle circulates liquid through pipes and channels in the engine. When the liquid flows through the high-temperature engine, it absorbs heat, thus reducing the temperature of the engine. After the liquid flows through the engine, it flows to the heat exchanger (or radiator), and the heat in the liquid is emitted into the air through the heat exchanger.

Some early automobiles used air-cooling technology, but modern automobiles hardly use this method. This cooling method is not to circulate liquid in the engine, but to heat the cylinder through the aluminium sheet attached to the surface of the cylinder block. A powerful fan blows these aluminium sheets into the air to cool the engine.

The whole engine cooling system consists of two systems: cooling water loop and cooling air channel. Cooling water circuit includes engine, water pipe, thermostat, radiator and cooling water pump. Cooling air passes through the intercooler, radiator, fan and engine in turn, and takes away the heat generated by the engine.

The engine is the heat source of the whole system. About one third of the energy generated by engine fuel combustion is transferred to the cooling system or directly emitted to the atmosphere through the cylinder wall as heat. In the cooling water loop, the throttler controls the flow through the wax ball control. When the thermostat is not opened, all the water flows back to the engine through the bypass channel through the pump. When the thermostat is opened, the cooling water enters the radiator, and the water from the radiator and the bypass water mix at the pump.

for most of the owners, how to recycle the coolant completely, how to realize the opening and closing of the thermostat is not necessary. It is more valuable than understanding the principles of engine cooling system and dealing with common problems. I hope this article can help more car owners understand the cooling system of automobile engine and enhance people's awareness of the maintenance of automobile cooling system, which is also the original intention of this article.