Fuel delivery system - ’k’ series

FUEL DELIVERY SYSTEM - ’K’ SERIES

Recirculating fuel system - ’K’ series illustrated

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

RECIRCULATING FUEL SYSTEM

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.

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.