Influence of charge motion and injection pressure on the particulate emission of a gasoline DI-SI engine at homogeneous, boosted operation English

  • Category Technical paper
  • Related event International Congress : SIA Powertrain - Versailles 2015 - 27-28 May 2015
  • Edition SIA
  • Date 05/27/2015
  • Author M. Bertsch, T. Koch, A. Velji - Karlsruhe Institute of Technology (KIT)
  • Language English
  • Type PDF file (1.65 Mo)
    (Downloadable immediately on receipt of online payment)
  • Number of pages 10
  • Code R-2015-04-25
  • Fee from 8.00 € to 10.00 €

Measurements with different charge motion strategies (baseline configuration, Tumble, Swirl) were performed on a single cylinder gasoline DI engine at boosted operation (1.4 MPa IMEP) at an engine speed of 2000 rpm. To show the influence of a large scale charge motion, different valve timings were applied. Thus, turbulent kinetic energy as well as the residual gas content can be varied. A second solution to increase the turbulent kinetic energy is the reduction of the intake valve lift.
Another strategy to reduce particle number emissions using a multi-hole solenoid injection system is an increase of the injection pressure. Therefore it was varied from 20 MPa to 30 MPa.
Additional thermodynamic analysis of the in-cylinder pressure trace using a Three-Pressure-Analysis helps to interpret the effects of the different settings and can help to understand the particulate formation process.

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