Intake and Exhaust Processes in Combustion Engines, Development of Siflex

  • J. J. Seppen
Conference paper
Part of the Lecture Notes in Engineering book series (LNENG, volume 18)


The gas flow through the intake and exhaust ports of piston combustion engines has a strong influence on engine efficiency, maximum power output and exhaust gas emissions. A computer model which can predict the flow through the intake and exhaust ports will be a strong design tool and will provide a better understanding of the flow phenomena.

Therefore, SIFLEX (Simulation of FLow through EXhaust ports) is being set up at IW-TNO (Delft, The Netherlands) in cooperation with the Delft University of Technology. SIFLEX will be a ‘user-friendly’ satellite of PHOENICS BFC, and validated by measurements. SIFLEX will be available to industry.

The set-up of SIFLEX can be split into two major parts:
  1. I

    set-up of a correct physical model

  2. II

    correct solution of this model


Before checking the physical model with measurement, however, this model has to be solved reliably. In this field, grid generation is the main problem. Tests have been carried out with both cartesian and polar coordinate systems. The results thereof will be discussed. To check the physical model (problem I), tests have been carried out on a stationary flow rig of the cylinder head.


Maximum Power Output Cylinder Head Cartesian Grid Intake Port Engine Efficiency 
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.


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Copyright information

© Springer-Verlag Berlin, Heidelberg 1986

Authors and Affiliations

  • J. J. Seppen
    • 1
  1. 1.IW-TNO.The Netherlands

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