Electric fuel pump (petrol engines only) (Skoda Octavia 1U)

In cars with gasoline engines, the electric fuel pump is installed in the fuel tank. The pump is two-stage and at the same time is a fuel reservoir with a volume of approximately 600 cc.

The pump body is suspended on a bracket using elastic shock absorbers, which significantly reduce noise transmission.

To illustrate, let's imagine the operation of a pump here. Its body contains two independent pumps, driven by one electric motor. The first stage of the pump sucks fuel through a coarse filter and drives it along a lifting pipe into the pump body - into the reservoir. The second stage sucks fuel from the reservoir and delivers it through a pipeline to the engine injection device.

This pump develops a pressure of 0.3 MPa and a capacity of approximately 90 l/h. The pump sucks fuel through the suction channel and throws it into the outlet pipe. All pump parts are immersed in fuel.

The check valve located in the outlet fitting prevents the return flow of fuel from the pressure pipeline through the pump into the tank and simultaneously maintains the operating pressure for a certain time after the ignition is turned off. Fuel not required in the injection device returns through the drain pipe back to the tank.