Engine Malfunctioning Conditions Identification through Instantaneous Crankshaft Torque Measurement Analysis

In this study a coupled thermodynamics and crankshaft dynamics model of large two-stroke diesel engine was utilised, to map the relationship Instantaneous Crankshaft Torque (ICT) with following frequently occurring malfunctioning conditions: (a) change in Start Injection (SOI), (b) Rate Heat Release (RHR), (c) scavenge air pressure, (d) blowby. This performed using frequency analysis on ICT, which obtained through series parametric runs model, under various healthy operating conditions. process demonstrated that ICT can be successfully utilised identify distinct effects malfunctions or (d), as they occur individually any cylinder. Furthermore by same process, identified for cylinder, however there is no effect among these malfunctions, since their in-cylinder pressure similar. As result, demonstrates usefulness non-intrusive diagnostic measurement, well benefits conditions mapping, allows quick less resource intensive identification malfunctions.