Engine management system - EDC (Fuel system): Description and operation

FUEL SYSTEM

Fuel is drawn from the tank by the Fuel Injection Pump (FIP) via a filter, located in the engine compartment, which removes particle contamination from the fuel.

The FIP meters a precisely timed, exact quantity of fuel into the injectors in response to throttle variations, injection timing varying with engine speed.

Any excess fuel delivered to the FIP is not injected, but passed back to the tank via a fuel return line.

Fuel is injected directly into the cylinder head where it ignites. A swirl chamber, machined into the piston crown, promotes efficient mixing of the fuel with the already compressed air. The burning fuel expands rapidly in the combustion chamber, creating extreme turbulence which further mixes the burning fuel with the compressed air, providing complete combustion and reducing emissions.

Fuel Injection Pump (FIP)

1. Fuel quantity servo potentiometer
2. Fuel quantity servo control unit
3. Fuel shut off solenoid
4. Injection timing device solenoid valve
5. Control spool
6. Injection timing device
7. FIP drive shaft
8. Fuel temperature sensor