INFLUENCE OF THE INTERNAL GAS MIXTURE ON THE ION CURRENT SIGNAL

The paper explains ion current measurements using the spark plug as the sensor for port injected and also GDI (gas direct injection) engines. In the general load, air-fuel ratio and EGR (exhaust gas recirculation) rate have a strong influence on ion current signal. In a GDI engine, air-fuel ratio and EGR are linked close together. It is possible to detect EGR rates during the flame kernel formation period by correlations with signal features up to the first ion current maximum. In stratified mode the mixture near spark plug tends to be stoichiometric. Cyclic variations of the ion current signal show a strong influence on the amplitude of the ion current maxima. The paper demonstrates that averaging as well as filtering are effective tools to reduce these cyclic variations.

• Corporate Authors:

  Elsevier

  Radarweg 29
  Amsterdam,   Netherlands  1043 NX
• Authors:
  • Finkeld, E
  • Hart, M
  • Herweg, R
  • Kessler, M
  • Muenkel, G
  • Wilhelmi, V
• Conference:
  • Advances in Automotive Control 2001. Proceedings of the 3rd IFAC Workshop
  • Location: Karlsruhe, Germany
  • Date: 2001-3-26 to 2001-3-30
• Publication Date: 2001

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 379-384

Subject/Index Terms

• TRT Terms: Automated vehicle control; Control systems; Exhaust gases; Gasoline engines; Recycling; Spark plugs
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00921263
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 4 2002 12:00AM