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New Combustion Systems in Spark Ignited Engines

New Combustion Systems in Spark Ignited Engines

3 days
MOT/COMBE-E
Sessions
This course is not scheduled.
Who should attend?

Audience

    • Engineers and technical staff who have to optimize SI engines’ combustion.

Level

  • Advanced
  • 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.
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.
Course Content

Current technologies & associated combustion systems

0.75 day

  • 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)

0.25 day

  • Normal combustions: turbulence, thermodynamical conditions, spark ignition.
  • Abnormal combustions: knocking, rumble, superknocking, …
  • Valve timing, impact on combustion.

Combustion system design with indirect injection (GII)

1 day

  • Combustion chamber shape, ports design, injector targeting, rail pressure.
  • Warm phase combustion.
  • Cold phase combustion.

Combustion system design with homogeneous direct injection lambda = 1

0.5 day

  • 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

0.5 day

  • Impact of combustion optimizing on architecture choice: 2, 3, 4 cylinders.
  • International context (RON, intake spoiling, flex-fuel, …).
  • Technical evolution in 2020 view.
Ways & Means
  • Interactive talks.
  • Many "up-to-date" examples and combustion videos.