The article studied how faulty air mixture formation petrol deviations from uniformity is a due injectors waste can generate large drops of fuel. To conduct this study was conducted an experimental stand  which allows modification of the duration of injection and its cyclicality. To highlight the injector nozzle wear scans were performed by laser profilometry. Highlighting the large droplets of fuel was performed using rapid shootings.
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Marius Beniuga, Ioan Mihai, "Studies concerning the effect of large droplets creation during fuel atomization," Proc. SPIE 10010, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VIII, 100101N (14 December 2016);