MTZ industrial

, Volume 5, Issue 1, pp 58–65 | Cite as

Influence of Crankshaft Torsion on Cylinder Pressure Diagnostics

  • Jürg Stadler
  • Mirko Ciecinski
  • Andreas Wimmer
  • Thomas Jauk
Research Torsional Vibrations

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).

1 Motivation

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.

The prerequisite for precise calculation of cylinder volume is a...


Optical Measurement System Indicate Mean Effective Pressure Individual Cylinder Torsion Curve Total Torsion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



Thanks go to Herbert Schaumberger and Reinhard Steiner of GE Jenbacher for their assistance on this project.


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Copyright information

© Springer Fachmedien Wiesbaden 2015

Authors and Affiliations

  • Jürg Stadler
    • 1
  • Mirko Ciecinski
    • 1
  • Andreas Wimmer
    • 2
  • Thomas Jauk
    • 2
  1. 1.Kistler InstrumentsWinterthurSwitzerland
  2. 2.GrazAustria

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