The function of the automobile water pump is to pressurize the coolant to ensure that it circulates in the cooling system. Generally speaking, it allows the water to continuously circulate through the radiator and engine block to take away heat to ensure that the engine is not overheated. 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. There is also a thermostat next to the water pump. When the car is just started (cold car), it is not turned on, so that the cooling water does not pass through the water tank, but only circulates in the engine (commonly known as small circulation). When the temperature of the engine reaches 80 degrees or more When it is turned on, it is turned on, the hot water in the engine is pumped into the water tank, and the cold wind blows through the water tank when the car is moving forward, taking away the heat. This is roughly how it works. The car water pump is used to drive the coolant circulation, and the engine can cool down only when the coolant circulates.The function of the water pump is to pressurize the coolant flowing through the radiator and send it into the cylinder water jacket to facilitate the flow of cooling water. Gasoline water pump maintenance Early car engines did not have an important accessory that we think is essential today—the water pump. The liquid cooling medium used at that time was pure water, mixed with a little wood alcohol at most to prevent freezing. The circulation of cooling water relies entirely on the natural phenomenon of thermal convection. After the cooling water absorbs heat from the cylinder block, it naturally flows upwards and enters the upper part of the radiator; after the cooling water becomes cold, it naturally sinks to the bottom of the radiator and enters the lower part of the cylinder block. Using this thermosiphon principle can barely complete the cooling task. But not long after, water pumps were added to the cooling system to move the cooling water more quickly. The cooling system of modern automobile engines generally uses centrifugal water pumps. The reasonable installation position of the water pump is at the bottom of the cooling system, but most of the water pumps are placed in the middle of the cooling system, and a few water pumps are placed on the top of the engine. The water pump placed on top of the engine is prone to cavitation. No matter where it is, the pumping volume of the water pump is very large. For example, the pumping volume of the water pump of a V8 engine is about 750L/h at idle speed, and about 12000L/h at high speed.
From the perspective of service life, the biggest change in water pump design is the appearance of ceramic seals a few years ago. Compared with the rubber seals or leather seals used before, ceramic seals are more wear-resistant. But it also has the disadvantage of being easily scratched by hard particles in the cooling water. Although continuous improvements have been made in the design to prevent failure of the water pump seal, so far the seal of the water pump cannot be guaranteed to be free of problems. Once the seal leaks, the lubrication of the water pump bearings will be washed out. Reference source: Baidu Encyclopedia - Automobile Water Pump 2, What is the function of the engine cooling system?
The role of the cooling system is to keep the engine within an appropriate temperature range under all operating conditions. The cooling system not only prevents the engine from overheating, but also prevents the engine from being too cold in winter. The cooling system can be divided into air cooling and water cooling according to different cooling media.