EFI works with several key principles, systems Electronic Fuel Injections systems are divided into three main types:
1 fuel line system.
2 air intake system
3 Electronic Control System
Here will be explained one by one on the main part of the EFI
1 fuel line system
Fuel line system, consisting of a fuel tank, fuel pump, fuel pipelines, pressure regulator, the pipe (hose) behind.
Fuel injector leading to reduced use of fuel pump. Fuel pump is placed close to the fuel tank, while the impurities that exist in the fuel is filtered by using a filter that is very precise, it is intended to not clog the injector.
Fuel pressure, labored always constant, to do this use the tool pressure regulator, if the excess pressure will be turned into another tank through the hose behind.
Air intake system consists of air filter, air flow meter, throttle valve, intake air chamber, intake manifold runners, and intake valve.
When the throttle valve is opened, air flows through the air filter, air intake openings depending on the size of incoming throtlle, the larger the aperture, the greater the air flow.
At Toyota engine has two methods to calculate the intake air volume, ie L-type EFI where this type will instantly calculate the volume of air intake, EFI where both D calculations using the pressure in the intake manifold.
The electronic control system consists of multiple control systems, the ECU (electronic control unit), Injector and associated wiring.
The function of the ECU itself to determine how much fuel to be sprayed from the reference counting sensors that are on the machine.
ECU turn each injector depends on the pulse sent from the crankshaft sensor.
