EFI (Electronic Fuel Injection)

EFI (Electronic Fuel Injection) use on petrol engine to change carburetor. EFI (Electronic Fuel Injection) is better than use carburetor.
EFI (Electronic Fuel Injection) can difference became 2 kinds:
- D-EFI (Speed Density Control Type) – base on a situation in which vacuum exists in
intake manifold and air volume sensor base on thickness.
- L-EFI (Mass Flow Control Type)- Air sum which in to intake manifold control with air flow meter.
L-EFI is better than D-EFI to detect air sum entering.
EFI (Electronic Fuel Injection) is better than use carburetor because:
Ignition is better and HC on throw gas more low, specially during the speed decrease. On - This time, the input air reduce and a situation in which vacuum exists is big. On
carburetor, the fuel, which on input channel will go into combustion chamber because happen a situation in which vacuum exists suddenly. The mix became good, so the ignition (combustion) isn’t good and HC became much. On EFI, the fuel injection can ended when the air valve close.
- Motor can easily turn on low temperature. If use carburetor it’s more difficult. On EFI, if on low temperature, the fuel spray do with cold start injection.
- Better reaction when the gas pedal pressed because the injection equipment on EFI (Electronic Fuel Injection) is near from combustion chamber. The fuel pressed with bigger pressure than the pressure in intake manifold. So, the air mix can go to combustion chamber faster and the ignition happen faster. On carburetor the distance of carburetor is far. So, the ignition happen slower.
- Compare of air and petrol is always exact. It’s not on carburetor because carburetor has
many speed system.
- On each cylinder, there is an injector. The injection volume controlled from computer. So, the mix on each cylinder is same and the petrol distribution is good.