Abstract
An experimental rig along with a MATLAB script for examining mechanical diesel injection systems have been successfully developed in this work. The system is capable of extending further to include a high-speed camera for imaging spray breakup events occurring in the near field of injector exit. The system developed in this study allows to record hydraulics characteristics of a number of consecutive injection shots. The MATLAB script allows to isolate fuel line pressure signal of single injection shot from those consecutive events (e.g. 400 shots used in this article), then to output the mean, coefficient of variation (CoV) in fuel line pressure and other interested parameters. The CoV values get a peak of 7% approximately and at the maximum pressure location. The high CoV peak might contribute to the engine cycle-to-cycle variation (CoV of indicated mean of effective pressure - IMEP) and this suggests an investigation to link this with CoV of IMEP in the future in an engine test-bed.
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