What is the working principle of a fuel pump?

[OFrancisco]

The principle of a fuel pump is to draw gasoline from the fuel tank and press it through the pipeline and fuel filter into the float chamber of the carburetor. Here are some introductions about the fuel pump: 1. It is precisely because of the fuel pump that the fuel tank can be placed at the rear of the car, far away from the engine, and below the engine. 2. The electric fuel pump does not rely on the camshaft to drive it but uses electromagnetic force to repeatedly move the pump diaphragm. This type of electric pump can be freely installed and can prevent vapor lock. 3. During operation, the flow rate of the fuel pump should not only meet the consumption required for engine operation but also ensure sufficient return flow to maintain stable pressure and adequate cooling of the fuel system.