•  The injector is composed of: a command piston that controls the needle nozzle, a control chamber with an inflow/outflow orifice, and an electromagnetic valve that controls the inflow/outflow of fuel to the control chamber via an on/off function.

•  The command piston is connected to the nozzle so that the up and down movement of the piston results in the opening and closing of the nozzle.

•  The command chamber contains a single orifice plate to provide an inflow and outflow path.