The automotive electric water pump is a simple centrifugal pump and an important component of the automotive engine cooling system.

1、 Working Principle of Automotive Electric Water Pump

The working principle of the automobile electric water pump is that the Circular motion of the motor makes the diaphragm in the automobile electric water pump reciprocate through the mechanical device, thus compressing and stretching the air in the pump chamber. Under the action of a one-way valve, positive pressure is generated, creating a vacuum at the suction port and a pressure difference with the external atmospheric pressure. Under the action of pressure difference, water is pressed into the inlet and then discharged from the drainage pipe. Under the action of the kinetic energy transmitted by the motor, water is continuously sucked in and discharged, forming a relatively stable flow rate.

2、 Application of the working principle of automotive electric water pumps

The automotive electric water pump is equivalent to a 12V or 24V electric coolant pump operating in the car, which uses an electric motor to drive pressurized circulating liquid to help the car engine dissipate heat.

As a new type of automotive water pump, automotive electric water pump has emerged with the rapid development of automotive industry technology and related supporting facilities and devices. The electric water pump is the core and important functional component of the cooling system of new energy vehicles. Its performance and quality have a significant impact on the performance of cars.

Automotive electric water pump is widely used, mainly in vehicle preheating system, automotive engine cooling cycle, Hydrogen fuel cell thermal management system, new energy vehicle drive system, electric vehicle battery cooling system, Battery electric vehicle bus and hybrid bus motor control cooling cycle and other automotive cycle cooling and control systems.

3、 Advantages of the working principle of automotive electric water pumps

1. High working pressure of automotive electric water pump

The automotive electric water pump is driven by an electric motor, so the pressure on the coolant is always high. A sufficiently high level of force can allow the automotive electric water pump to deliver the coolant to various parts of the engine, allowing the engine to cool better and faster.

2. Low energy consumption of automotive electric water pumps

The electric water pump in cars only requires a small amount of energy to operate. Under normal circumstances, the electric water pump in cars uses a voltage output of 12V. When we use the electric water pump, there is not much energy loss. A constant power also allows the coolant of the car engine to be continuously supplied.

3. Low friction in automotive electric water pumps

Compared to the working principle of mechanical water pumps, automotive electric water pumps do not have too much friction. The automotive electric water pump is driven by an electric motor and only runs when the water pump is working. If certain conditions are not met, the automotive electric water pump will remain dormant and ready at any time. Electric pumps also have fewer moving parts, saving space and reducing friction.

4. Low risk of leakage from automotive electric water pumps

The risk of water leakage in automotive electric water pumps is greatly reduced. The impeller of the mechanical water pump is installed on the water pump bearing through interference fit, while the integrated magnetic impeller of the electric water pump is driven by a magnetic core installed on the water pump casing. This can achieve separation of the water chamber and the outside, remove the water seal, and reduce the risk of friction loss and water leakage.

5. Long service life of automotive electric water pumps

The service life of automotive electric water pumps is longer, and they can work continuously for over 20000 hours under normal circumstances. The quality of automotive electric water pumps affects the normal operation of automotive engines.

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