Experimental assessment of a prototype hollow cone spray injector by means of spray and engine characterization

The application of more efficient combustion concepts requires the advancement of fuel injection technologies. The injector nozzle in the critical component of the whole injection system for its impact on the combustion process. It is characterized by the number of holes, diameter3, internal3 shape, and opening angle . The reduction of the hole diameter seems the simplest way to promote the atomization process, bit consequently, the number of holes should increase to keep constant the injected fuel mass. The logic gas been applied to the development of a New generation injector. FIrst, the tendency to increase the nozzle number and to reduce the diameter gas led to replacement of the nozzle with a circular plate. The vertical movement of the needle generates an annulus area for the fuel delivery on 360 degrees, so controlling the atomization es a fiction of the vertical Plate position, capable of generating a hollow cone spray. Secondo on the base of the obtained results, different configurations were introduced.