An investigations of varied cross section nozzle of injector of Diesel engines for performance improving and toxic exhaust gases emission reducing

The paper concerns a new idea of fuel injector for Diesel engines on base of invention applied by M. Zabłocki and J. Szymański. Some results of preliminary operating parameters research are presented in the paper. This investigation was conducted on the research Diesel engine equipped with varied cross section nozzle injector. The new-made research injector has needle, which executes rotational reciprocal motion. The new worked-out injector has outflow holes with flow section that undergoes a change during the injection process, which enables to decrease of diameter of fuel droplets. The measurements were performed at varied rpm (from 1000 rpm to 1600 rpm) and maximum fuel doses. The injector was not optimized in relation to engine performance. The objectives of the research were determination either the working quality of a new injector and their influence on combustion process in different method of mixture preparation process. The obtained results show a direction of further researches that impact on system optimization, injector manufacturing improvement, fuel preparation improvement to obtain proper droplet size and both fuel consumption reducing and toxic exhaust gases emissions reducing.