Analysis of Marine Piston Engine Injectors Dynamic State for the Non-Invasive Diagnostics Purpose

Abstract

The paper presents results of measurements conducted during multi-stage studies on injectors of WOLA 72H6 engine. The research was conducted to determine the technical condition of the injectors during their operation. As a result of the injector modeling in the CAD environment, the resonant frequencies of the examined element were obtained. The next stage of the study was a stand-alone tests with the simultaneous recording of vibration parameters. The aim of records was to link the vibration parameters with the technical condition of the tested injectors. The study series was finished with measurements on a real object test stand.

Analysis of Changes in the Opening Pressure of Marine Engine Injectors Based on Vibration Parameters Recorded at a Constant Torque Load

“…Based on many years of diagnostic experience gathered at the Institute of Ship Construction and Operation of the Polish Naval Academy and the analysis of the available literature, an assessment of the causes of the operational unsuitability of marine engines operated in the navy was carried out (Figure 1) [4,[7][8][9][10]. The conducted analysis showed that the most frequent damage occurs in the following functional systems:…”

Method of Fuel Injector Diagnosis Based on Analysis of Current Quantities

“…The research work conducted so far, devoted to injectors and electromagnetic valves, focused on tests in regard to the fuel injector design, development of research methods, and evaluation of the injected fuel stream, but also the emissions of toxic components of exhaust gases. The authors of works [1][2][3] used measurements and analyses of vibrational signals to test fuel injectors and evaluate the quality of the injection process. In work [4], the authors applied conducted tests, a combination of qualitative imaging techniques and quantitative techniques for the determination of the drop size, such as laser diffraction and Doppler anemometry (PDA).…”