Fuel injector for diesel type internal combustion engine, has nozzle with body comprising supply channel emerging into supply chamber defined around closing needle and injection conduits emerging into sections of inner passage

摘要

The injector has an injection nozzle (1) with a tubular body (2) comprising injection conduits (29, 30) emerging into lower and upper sections (43, 41) of an inner passage (4), respectively. The body has a supply channel emerging into a supply chamber (45) defined around a closing needle (5) between the sections, and a supply channel (27) emerging into the upper section. The needle selectively communicates the conduits (30) with the channel (27) in an intermediate opening position, and the conduits (29) with the chamber in an opening position.