Fuel Delivery and Air Induction: Description and Operation

Fuel Supply System:

TYPE
The fuel delivery system is a sequential Multi-Port Injection (MPI) type.


PURPOSE
The fuel delivery system supplies engine with proper amount of fuel at correct pressure.


CONSTRUCTION
The fuel delivery system consists of a fuel tank, fuel pump, fuel filter, fuel pressure regulator, fuel rail, six fuel injectors and required fuel lines.

Also to be considered part of the fuel system is the Evaporation Control System. This is designed to reduce the emission of fuel vapors into the atmosphere. The description and function of the Evaporative Control System is explained under Emission Control Systems. Emission Control Systems

OPERATION
Fuel is pumped from the fuel tank to the fuel injectors through the fuel filter, fuel rail and the pressure regulator, by the electric in-tank fuel pump.

The vacuum assisted regulator maintains pressure at injectors by allowing excess fuel to return to tank via return line.

The engine controller controls the amount of fuel injected by controlling the length of time injectors are energized, this period of time is known as "injector pulse width".

The injectors are fired individually, with each injector firing once per intake stroke.