Simulation of diesel engines

Injector

  • Enables simple modeling of an additional injection profile as an input parameter for combustion rate and emissions models.
  • Parameterization of the start of injection and, optionally, injection quantity or injection period.
  • Direct incorporation of injection characteristics from the ECU data is often possible.

 

Phenomenological combustion rate model

  • Specification of the injection rate with any number of pre-and post-injections, optionally via GT Injector or FKFS Injector.
  • Ignition delay calculation via a coupled Arrhenius and Magnussen approach.
  • This is divided into premixed and diffusion components, corresponding to the injection profile and the ignition timing.
  • Takes into account the local mixing state for premixed combustion.
  • Representation of the mixing of fuel and air during diffusion combustion, via a slice approach with superimposed Lambda distribution.

 

Phenomenological nitrogen oxide and soot particle model

  • Physically correct responses to changes in boundary conditions/operating states, for example gas temperature, pressure, injection strategy, EGR, charge motion (swirl).
  • Division of the burnt zones into several sub zones, to take into account the influence of wall temperature, as well as reduced NO formation where there is a local lack of air, during transient processes.
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