A Multi-Point Injection system uses a fuel injector for each cylinder.
- Fuel injectors, or fuel injection valves, are fluid control valves. They are either open or closed. The fuel pump sends fuel under constant pressure to the injectors. In a port injection system, when the electronic control module detects the proper time for the fuel delivery, it turns on each projector.
- This will enable to open the valve at the end of the injector. The pressurized fuel then sprays out into the air entering the cylinder.
- Fuel delivery continues as long as the valves are open. The time is computed and controlled by the electronic control module