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Case study 2


  • Validate the piston secondary motion, piston slap and liner vibration prediction capability of PISDYN by comparing predictions with experimental data


  • IL4 2.0 Litre Gasoline Engine 

Validated Data

  • Bore distortion
  • Piston and cylinder block temperatures using VECTIS CHT analysis
  • Cold idle transient warm up
  • Piston Secondary Motion, lateral displacement and tilt
  • Liner acceleration 

Parametric Studies

  • Piston pin offset
  • Piston skirt profile 


  • Graphs show good correlation between measured piston secondary motion and liner acceleration, and PISDYN predicted values
  • Presented at SAE (SAE 2007-01-1245)


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