View inside the fuel supply module
Flange
Seals the fuel supply module in the tank so that no fuel can penetrate into the vehicle interior.
Fine filter
Filters the fuel to protect the injection valves.
Electric fuel pump
Pumps the fuel from the tank into the engine – in the right quantity and at the right pressure.
Jet pump
Fills the pot permanently with fuel until it overflows. As a result, the pot, including the main fuel pump, always remains completely full.
Pot
Ensures that the pump is always submerged in fuel.
Tank level sensor
Determination of the fuel level in the tank.
Pre-filter
Filters particles that can damage the pump.
View inside the electric fuel pump
Electrical connection
Supplies the pump with power and connects it to the control unit.
Pump housing
Seals the pump to the outside so that no unfiltered fuel can enter.
Winding
Wire coil that generates a magnetic field. This magnetic field is the force that sets the motor in motion.
Anchor
Rotating part of the motor that is driven by the magnetic field and converts the electrical energy into a mechanical pumping movement.
Intake opening
The fuel is sucked into the interior of the pump through the intake opening with the aid of negative pressure.
Fuel supply modules are manufactured at the production sites according to original equipment standards. Bosch tests its electric fuel pumps for an above-average service life of 2,500 hours. Pumps from other manufacturers were only tested for 233 and 1,217 hours respectively.
The number one cause of failure is dirt particles.
Possible consequences:
The complete module replacement including electric fuel pump saves valuable diagnostic time and reduces the risk of errors. The fuel supply modules are ready to install out of the box.
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