Injection nozzle for IC engine - has hollow needle controlling first group of injection holes and loaded by first spring towards its closure position

摘要

Inside the hollow needle (6) is a concentric inner needle (12), which is loaded towards its closure position by a second spring. At least one of the needles works in conjunction with a piston (17) which closes a cylinder chamber in the nozzle holder (1). A switch component (19) is provided which in one position causes the cylinder chamber of the piston to be fed with injection pressure, and when this occurs the piston loads the needles in the direction of their closure position. The inner needle (12) is connected to the piston (17) via an operating rod (15). USE/ADVANTAGE - For fuel injection is an IC whereby the injection hole cross-section is adjusted according to the actual running state of the engine.