Fuel delivery system (Fuel delivery system - MEMS)

FUEL DELIVERY SYSTEM

1. Injectors
2. Fuel pressure regulator
3. Fuel return line
4. Non return valve
5. Fuel tank
6. Fuel pump
7. Swirl pot
8. Fuel filter

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 fuel pick-up.

Pressurised fuel is fed to an in-line filter via a non return valve which prevents fuel returning to the tank when to 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 in the fuel rail and returns excess fuel to the swirl pot in fuel tank. A venturi in the fuel tank causes returning fuel to draw cool fuel into the swirl pot.