Fuel Delivery and Air Induction: Description and Operation

PURPOSE
The Fuel Delivery and Air Induction systems delivers a precise amount of highly atomized fuel to the intake system to ensure optimum performance and emissions compliance.

OPERATION
The Fuel Delivery and Air Induction systems perform this function in the following manner:

Fuel Delivery and Return
The fuel delivery system delivers fuel from the fuel tank, through the fuel filter, at a pressure and quantity high enough to allow the fuel regulator to maintain a constant fuel pressure in the fuel delivery rail (in reference to the intake manifold pressure) under all driving conditions. The injector delivers fuel in an appropriate spray pattern to promote total fuel atomization in the intake air stream. The fuel return system recovers excess fuel vented by the fuel pressure regulator (mounted on the fuel rail) and returns it to the fuel tank. The fuel return line is low pressure and returns directly to the fuel tank.

Air Induction
The Air Induction System supplies the proper amount of intake air as indicated by driver input (the accelerator pedal), cold fast idle requirements or other driving conditions.