How does the Auxiliary Cooling Water Pump increase the flow pressure of the coolant?

The Auxiliary Cooling Water Pump is usually electrically controlled by the engine control unit. Inside, the pump bearing and impeller are driven to rotate by a pulley or other drive mechanism. When the impeller rotates, the coolant in the water pump is driven to rotate with the impeller. Under the action of centrifugal force, the coolant is thrown to the edge of the water pump housing, and a certain pressure is generated in the process. Then, the pressurized coolant flows out of the outlet or water pipe and enters other parts of the cooling system.
The core component of the water pump is the impeller, which is usually composed of multiple blades. When the impeller rotates, the blades push the coolant to rotate together, thereby generating centrifugal force. Under the action of centrifugal force, the coolant is thrown to the edge of the water pump housing. In this process, the speed of the coolant increases and the pressure also increases. The pressure at the center of the impeller decreases due to the coolant being thrown out, forming a low-pressure area. At the same time, the coolant in the water tank or coolant storage tank is sucked into the impeller through the water pipe under the pressure difference between the water pump inlet and the center of the impeller. As the impeller continues to rotate, the coolant is constantly thrown out and sucked in, forming a continuous coolant cycle. During this process, the pressure of the coolant is continuously increased and maintained.
In some advanced vehicles, the Auxiliary Cooling Water Pump may be equipped with an intelligent electronic control system. These systems can adjust the speed of the water pump and the coolant flow rate in real time according to the operating status and temperature of the engine. For example, when the engine load is large or the temperature is high, the electronic control system will increase the speed of the water pump to increase the flow and pressure of the coolant, thereby more effectively reducing the engine temperature.
In order to ensure that the coolant does not leak and maintain the appropriate pressure, the Auxiliary Cooling Water Pump usually adopts sealing measures such as water seals and gaskets. These seals can prevent the coolant from leaking out of the water pump housing or connections, and maintain the integrity and pressure stability of the cooling system.