Influence of Crankshaft Torsion on Cylinder Pressure Diagnostics
- 78 Downloads
Torsion in long or flexible crankshafts can cause deviations between indicated and actual crankshaft angles at a given cylinder, and hence between calculated and actual cylinder volumes for a given crank angle. Kistler Instruments, GE’s Jenbacher product line and the LEC at Graz University of Technology have applied optical, in-cylinder measuring techniques to correct cylinder volume during fired engine operation. The research has led to more accurate combustion analysis, prediction of errors and a method of verifying simulation results. This article is based on a paper presented at the 2014 Torsional Vibration Symposium in Salzburg (Austria).
In addition to high precision measurement data from cylinder pressure indication systems, ever greater requirements regarding thermodynamic analysis in engine development processes primarily demand precise knowledge of respective cylinder volumes during fired operation.
KeywordsOptical Measurement System Indicate Mean Effective Pressure Individual Cylinder Torsion Curve Total Torsion
Thanks go to Herbert Schaumberger and Reinhard Steiner of GE Jenbacher for their assistance on this project.
- Davis, R.; Patterson, G.: Cylinder pressure data Quality checks and procedures to maximize data accuracy. SAE Paper 2006-01-1346Google Scholar
- Tazerout, M.; LeCorre, O.; Rousseau, S.: TDC determination in IC Engines Based on thermodynamic Analysis of the Temperature-Entropy Diagram. SAE Paper 199-01-1489Google Scholar
- Piraner, I.; Pflueger, C.; Bouthier, O.: Cummins Crankshaft and Bearing Analysis Process. 2002, North American MDI User ConferenceGoogle Scholar
- AVL Product description Excite Power Unit, Dynamics and acoustics of power units and drivelines, 2013Google Scholar
- Ciecinski, M.; Dolt, R.: Combustion Analysis of a 2-cylinder engine using a 60-2 crank speed sensor. 10th International Symposium on Combustion Diagnostics, 2012Google Scholar
- Jauk, T.; Wimmer, A.: Neues Mess-System zur Bestimmung des oberen Totpunktes in Verbrennungsmotoren. 12. Tagung “Der Arbeitsprozess des Verbrennungsmotors”, 2009Google Scholar
- Fusshoeller, H.; Bargende, M.: Verfahren zur OT Bestimmung, 14. Kistler Indizierexperten Forum, 2008Google Scholar