New Combustion Systems in Spark Ignited EnginesMOT/COMBE-E

Who should attend?

  • This course provides an understanding direct or indirect injection SI engines: the physics of the mixture preparation, of the combustion and of the pollutants formation; as well as the influence of the engine setting parameters.
Audience :
  • Engineers and technical staff who have to optimize SI engines’ combustion.

Level : Advanced

Course Content

  • Current technologies & associated combustion systems

      • Regulations: CO2, particles, WLTP.
      • Current engine technologies, associated combustion systems, indirect injection (GII), direct injection (GDI), central jet spray, side jet spray, homogeneous combustion, stratified combustion, CAI.
      • Impact of air loops, variable timing.
  • Generic approach of combustion systems (GII & GDI)

      • Normal combustions: turbulence, thermodynamical conditions, spark ignition.
      • Abnormal combustions: knocking, rumble, superknocking, …
      • Valve timing, impact on combustion.
  • Combustion system design with indirect injection (GII)

      • Combustion chamber shape, ports design, injector targeting, rail pressure.
      • Warm phase combustion.
      • Cold phase combustion.
  • Combustion system design with homogeneous direct injection lambda = 1

      • Central jet spray, side jet spray, combustion chamber shape.
      • Injector targeting.
      • Injection system, injection strategies, multiple injections.
      • Particles, dilution.
      • Warm phase combustion.
      • Cold phase combustion.
  • Technical evolutions

      • Impact of combustion optimizing on architecture choice: 2, 3, 4 cylinders.
      • International context (RON, intake spoiling, flex-fuel, …).
      • Technical evolution in 2020 view.

Learning Objectives

  • Upon completion of the course, participants will be able to:
  • organize a series of tests,
  • analyze the results in order to optimize combustion,
  • know the evolution trends for the next 5 years.

Ways & Means

  • Interactive talks.
  • Many "up-to-date" examples and combustion videos.