Classification and Working Principle of Oil Pumps

Gasoline pumps can be divided into two types: mechanically driven diaphragm type and electric driven type.

 

Mechanically driven diaphragm oil pump

 

 

Generally driven by the eccentric wheel on the camshaft, its working conditions are:

 

Oil absorption

 

During the rotation of the camshaft, when the eccentric wheel pushes the rocker arm and pulls down the pump membrane pull rod, the pump membrane descends, generating suction, and the gasoline is sucked out of the fuel tank, and enters the fuel chamber of the gasoline pump through the fuel pipe, fuel filter, and fuel chamber.

 

Pump oil

 

When the eccentric wheel rotates at a certain angle and no longer pushes the rocker arm, the pump membrane spring stretches, the push-pull pump membrane rises, and the gasoline is pressed from the oil outlet valve to the float chamber of the carburetor.

 

Generally, the maximum fuel supply of the gasoline pump is 2.5 to 3.5 times larger than the maximum fuel consumption of the gasoline engine. When the oil volume of the pump is greater than the oil consumption and the needle valve of the carburetor float chamber is closed, the pressure in the oil pump outlet pipeline increases, which reacts to the oil pump and shortens the diaphragm stroke or stops working.

 

Electric gasoline pump

 

The working condition of the electric gasoline pump is: instead of being driven by the camshaft, the pump membrane is repeatedly sucked by the electromagnetic force. This kind of electric pump can freely choose the installation position and can prevent the phenomenon of air resistance.

 

The gasoline pump of the electronically controlled gasoline injection system generally adopts a new impeller type electric pump and is installed in the gasoline tank, and its pumping pressure is also higher than that of the gasoline pump of the carburetor fuel supply system.

 

What happens when the car oil pump is broken?

 

The gasoline pump is an important part of the car, and its main function is to ensure the normal transportation process in the fuel supply of the car.

 

What happens if the oil pump fails?

 

• When the car is driving, the acceleration is weak, and when the oil is used, it will obviously feel deflated.

 

• It is extremely difficult to start the car during the start-up process, and it takes a long time to start the car repeatedly.

 

• The engine fault light in the car fault light is on, or the engine is obviously shaking and abnormal during driving.

 

Some faults about gasoline pump

 

Poor quality motor fuel

 

Automobile fuel is the key to the operation of automobile engine. Once the quality of automobile fuel is poor, it will cause the automobile fuel tank to be filled with various impurities and foreign objects, which will only filter out the large impurities during the oil filtering process, and more fine impurities will enter the fuel pump motor, causing the fuel pump to be damaged for a long time.

 

Delay refueling and do not replace the gasoline filter for a long time

 

The car should be refueled in time. If you wait until the oil light is on every time, the oil pump cannot be cooled and lubricated in time, which is one of the reasons for the damage of the oil pump. At the same time, if the gasoline filter is not replaced in time, it will cause the oil supply system to be blocked, making it difficult for the oil pump to pump oil, and eventually leading to its damage.

 

What should I do if the oil pump is broken?

 

When the oil pump fails, it is necessary to find out the cause of the failure in time and deal with it. If the pump body or pump core is damaged, it needs to be replaced in time. It is recommended to go to a specialized repair shop or 4S shop for treatment in time.

 

Conclusion

 

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