Influence of the Instantaneous Angular Speed (IAS) of Marine Diesel Engine on its Indication Results

• Published in: Solid state phenomena Vol. 236; pp. 204 - 211
• Main Authors: Lutowicz, Marek, Cuper-Przybylska, Dominika
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 01.07.2015
• Subjects: Irregular Angle Speed; Diesel; Indicated
• ISSN: 1012-0394; 1662-9779; 1662-9779
• DOI: 10.4028/www.scientific.net/SSP.236.204

The paper presents a method of transforming the time axis to the axis of the crank angle rotation based on the pressure measured in time domain and simplified model of the engine dynamics. Indicating is to register the pressure in synchronism with the engine crank angle rotation. Usually in the ad hoc measurements the crankshaft rotation angle transducer is avoided, and the measurements are performed in time domain. For further analysis time axis is transformed for crank angle axis on the base of linear transform. Pressure waveforms obtained during the research were subject of the described transform. During the research instantaneous angular speed (IAS) of the engine crankshaft has been changed by reducing fuel dosage to selected cylinders. Mean indicated pressure (MIP) was calculated. Values o pressure on the begging and the end of compression, opening and closing angles of valves were also determined.