Improving ion current feedback for HCCI engine control

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding


In HCCI you do not have the same control of the combustion like in SI and Diesel engines. Controlling the start of a combustion event is a difficult task and requires feedback from previous cycles. This feedback can be retrieved from ion current measurements. By applying a voltage over the spark gap, ions will lead a current and a signal that represents the combustion in the cylinder will be retrieved. Voltages of 450 V were used. The paper describes a new method to enhance the combustion phasing from the Ion current trace in HCCI engines. The method is using the knowledge of how the signal should look. This is known due to the fact that the shape of the ion current signal is similar from cycle to cycle. This new observation is shown in the paper. Also the correlation between the ion current and CA50 was studied. Later the signals have been used for combustion feedback.


  • Hans Aulin
  • Pascal Bentioulis
  • Per Tunestål
  • Jari Hyvönen
  • Bengt Johansson
External organisations
  • GM Powertrain Sweden
  • Lund University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Energy Engineering
Original languageEnglish
Title of host publicationPowertrain and Fluid Systems Conference and Exhibition
Publication statusPublished - 2007
Publication categoryResearch
EventPowertrain and Fluid Systems Conference and Exhibition, 2007 - Rosemont, IL, United States
Duration: 2007 Oct 292007 Nov 1


ConferencePowertrain and Fluid Systems Conference and Exhibition, 2007
CountryUnited States
CityRosemont, IL