Fuel delivery system

FUEL DELIVERY SYSTEM

RECIRCULATING FUEL SYSTEM

1. Fuel tank
2. Fuel pump
3. Swirl pot
4. Feed line

A recirculating fuel system is used to supply fuel to the injectors at a constant pressure and return excess fuel to the fuel tank.

Fuel pressure is produced by an electric pump immersed in the fuel tank and operating in a swirl pot to maintain a constant fuel level around the pump pick-up.

5. Fuel filter
6. Fuel rail
7. Fuel pressure regulator
8. Return line

Pressurised fuel is fed to an in-line fuel filter via a non-return valve which prevents fuel returning to the tank when the pump is not running. Fuel is delivered from the fuel filter to the fuel rail which supplies the injectors. A fuel pressure regulator mounted on the fuel rail controls the pressure of fuel in the rail and returns excess fuel to the swirl pot in the tank. A venturi in the fuel tank causes returning fuel to draw cool fuel into the swirl pot from the tank.