Liquid cooling and air cooling. The cooling system of a liquid-cooled car circulates liquid through the pipes and passages in the engine. As fluid flows through a hot engine, it absorbs heat, reducing the engine’s temperature. After the liquid flows through the engine, it turns to the heat exchanger (or radiator), through which the heat in the liquid is dissipated into the air.
Air Cooling Some early cars used air cooling, but modern cars rarely use this method. This cooling method does not circulate liquid in the engine, but dissipates heat from the cylinder through the aluminum sheet attached to the surface of the engine block. A powerful fan blows air over these aluminum sheets, dissipating heat into the air and thus cooling the engine. Because most cars are liquid-cooled, there are a lot of pipes in the cooling system in a car.
The automobile engine generates a lot of heat when it is working. In order to protect the normal operation of the engine and improve the gasoline combustion rate, it is necessary to use a certain cooling method to reduce the engine operating temperature when the engine reaches a certain operating temperature.
In the cylinder block of the car engine, there is a water channel for cooling water circulation, which is connected with the radiator (commonly known as the water tank) placed in the front of the car through water pipes to form a large water circulation system. On the upper water outlet of the engine, install There is a water pump driven by the fan belt to pump the hot water out of the water channel of the engine block and pump the cold water in. In this way, the coolant circulates in the cylinder liner of the engine and between the radiator, which is divided into two circulation modes:When the internal temperature of the engine (that is, cold car) does not reach the default working state of the thermostat (generally recognized as 80 degrees), the cooling water pump does not work, and the coolant does not flow through the car radiator, but only circulates inside the engine, relying on cooling The temperature difference between the fluid and the engine is used for heat exchange.
When the temperature of the engine and the circulating coolant reaches the default working state of the thermostat (above 80 degrees), the engine circulating water pump starts to work, and pumps the internal coolant of the engine into the radiator to make it circulate inside the radiator once. The cold wind generated when the car is running and the cooling wind driven by the electronic fan installed to ensure the cooling air flow blows through the radiator, taking away most of the heat, completing a heat exchange, and then the coolant is pumped into the engine by the water pump for further cooling. The heat exchange works. Carry out the cooling work of automobile engine in this way. (Note: The circulation pipe of the car radiator is a flat tube, which can approach the maximum heat dissipation area. At the same time, the heat dissipation belt with a window is in contact with the heat dissipation pipe. While ensuring the effective size, the window can change the cooling air. At the same time as the wind direction, bring the most heat into the air, in short, this structure can achieve the largest heat exchange area)
In order to supplement the consumed cooling heat in time, an automatic compensation liquid storage tank is usually installed next to the radiator, which can realize automatic compensation for the lost cooling liquid and ensure the working stability of the radiator. When the internal steam pressure of the engine is higher than the set value, in order to ensure the safety of the radiator, the pressure valve on the upper part of the water cover will automatically pop open, and part of the coolant will flow into the water storage tank through the overflow pipe, reducing the internal pressure of the radiator; When the temperature of the cooling liquid drops, the cooling liquid flows back into the radiator through the vacuum valve, effectively avoiding the loss of the cooling liquid.
Therefore, effectively maintaining the constant temperature of the engine working time can protect the operation of the automobile engine to a certain extent, effectively achieve the effect of fuel saving and emission reduction, and prolong the life of auto parts. Black technology products have been researched for more than ten years. They have the characteristics of fast heating, good heat preservation, and fast heat dissipation. Maintain the optimum working temperature and fully burn the fuel to achieve the goals of saving fuel, reducing exhaust emissions and increasing power.