Fuel System of Engine

Fuel Systems

Carbureted fuel system or Fuel Feed System

# Fuel injection system for Petrol Engine:

-Single Point Injection, called Throttle-body injection (TBI) or Central Fuel Injection (CFI).

-Port Fuel Injection (PFI)

-Multi-point fuel injection, MPFI (or just MPI)

-Central port injection (CPI) or central port fuel injection (CPFI)

-Direct fuel injection (DFI)

-Fuel Injection system for Diesel Engine

SPI OR TBI

The SPI system injects fuel at the throttle body.

Fuel pressure is usually specified to be in the area of 10-15 psi

Central port injection (CPI) or central port fuel injection (CPFI)

-Injector located in center of intake manifold

-60 psi system

-6 or 8 poppet valves attached to one TBI type injector

Direct fuel injection (DFI)

Injectors are pressed into the combustion chamber and spray fuel directly into the combustion chamber.

Multi-point fuel injection, MPFI (or just MPI)

-Multi-point fuel injection injects fuel into the intake ports just upstream of each cylinder's intake valve, rather than at a central point within an intake manifold.

-Typical fuel pressure runs between 40-60 psi.

 

Port fuel injection (PFI) technology