An investigation of the fuel injector dedicated to the aircraft opposed-piston two-stroke diesel engine

2/2019 (177) - CE-2019-227
Autorzy: Ksenia SIADKOWSKA, Mirosław WENDEKER, Łukasz GRABOWSKI
The paper presents the research results of the injector construction with the modified injection nozzle. The injector is designed for a prototype opposed-piston aircraft diesel engine. The measurements were based on  the Mie scattering technique. The conditions of the experiment corresponded  to maximum loads similar to those occurring at the start. The measuring point was selected in line with  the analysis of engine operating conditions: combustion chamber pressure at the moment of fuel delivery (6 MPa) and fuel pressure in the injection rail (140 MPa). The analysis focused on the average spray range and distribution, taking into account the differences between holes in the nozzle. As a result of the conducted research, the fuel spray range was defined with the determined parameters of injection. The  fuel spray ranges  inside  the constant volume chamber at specific  injection pressures and  in  the chamber were  examined, and the obtained results were used to verify and optimize the combustion process in the designed opposed-piston two-stroke engine. 
Słowa kluczowe: diesel engine, injector, opposed-piston engine, spray range