FUEL INJECTION SYSTEM

摘要

Disclosed is a fuel injection system, comprising an injection pump which is fed under high pressure by an electrically operated valve working in a discharge channel (30), the phase being determined by the valve closing. In order to achieve a two step injection, i.e. a preliminary injection and a main injection, and to simplify the stimulation of the electrically-operated valve (24), the came driving the pump piston (1) is so featured as to offer an area (P) where the pump piston stops in its tracks or withdraws, thereby interrupting the injection between the preliminary and the main injection.