Experimental Determination Of Low Speed Diesel Engine Crankshaft Twisting

The exhaust gas emission control, together with the demand for specific fuel oil consumption reduction, poses a challenge for constructors. As a possible solution a very accurate fuel injection and combustion process control is considered. Such a control needs a precise timing and synchronization with every piston movement. The understanding of crankshaft deformation phenomena seems to be essential. In this work the experimental methodology of the crankshaft twist angle determination has been presented. The method is based on the cylinder pressure signal and an incremental encoder signal analysis. The presented results show the mean value of crankshaft twist angle under load. The momentary values are presented, too.