The electro-injector is an electromechanical device, which is directly controlled by the gas ECU. It is in charge of the gas dosage coming from the vaporizer and directed to each cylinder.

It is made up of an electromagnetic reel/shutter device that opens/closes the nozzles in less than three milliseconds, comparable to those of normal petrol injectors.
The electro-injectors are normally closed. The gas ECU sends them electric impulses commanding the opening, thus allowing the gas to pass through the nozzle.

The outer body of the electro-injector unit is made of diamagnetic materials, resistant to corrosion and temperatures typical of the engine compartment.
The input connection of the electro-injector is realised via a connector to the tube coming from the vaporizer and the output connection via a nozzle calibrated  to the tube  connected to the intake manifold near the intake valve. The section of the nozzle exiting from the electro-injector is suitable chosen in relation to the engine’s specific power class.

The electro-injectors must be installed as close as possible to the branch of the manifold to feed using rubber tubes  of the same length and as short as possible.
For this reason, the electro-injectors are grouped together in modules of two, three or four.
   
   They have a common base on which are mounted each electromagnet. The aluminum base contains a single gas inlet connected to a duct inside. The gas flows into each injector from this duct.
   This base also contains the gas-tight compartments on which beat the shutters. The electricity is supplied via a connector integrated in the reel of each injector. The connectors are watertight and have a protection degree of IP54.