During the operation of the car, the combustion of the engine will generate a lot of heat, but the temperature of the engine should not be too high, otherwise problems such as cracking and deformation, poor oil lubrication, and increased wear will occur, which will shorten the service life of the engine. Therefore, it is very important to cool down the engine. There are many cooling water circulation channels in the engine block, and a water pump is installed on the upper water port of the engine, which is driven by the fan belt, and then the hot water in the water channel is pumped out, and the cold water is pumped in to keep the engine running within a certain temperature range.
The engine cooling water cycle generally has two cycles: the small cycle and the large cycle. When the car is just started, it is in a small cycle state, let the engine heat up to about 80 degrees as soon as possible (depending on the model, the set temperature value is different), and when the thermostat is turned on, the car cooling system enters a large cycle , Cool the engine coolant quickly through the water tank and radiator to keep the engine from overheating and malfunctioning.
