Fuel injection valve nozzle with orifice at first converges then diverges to combustion chamber as circular elliptical or slot orifice section.

摘要

The section of the injection orifice (20) at first converges (21) and then diverges (22) to the combustion chamber, the injection orifice to be either circular, elliptical or in slot shape. The narrowest section of the orifice necessarily lies in the center of the axial extent of the orifice.