This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An Investigation of the Impact of Cycle-to-Cycle Variations on the Ionic Current Signal in SI Engines
Technical Paper
2000-01-1943
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The applicability of the Ionic Current sensing method in production application is severely limited by the extent of cycle-to-cycle variations in the signal trace. In an attempt to investigate the sources for these cyclic signal fluctuations, experiments were conducted on a single cylinder 4-stroke, propane-operated engine. The ionic current signal was measured at two locations. The flame development phase in the vicinity of the spark plug gap was optically monitored by means of a high-speed CCD camera.
The results showed that only the second part of the Ionic Current signal is directly impacted by cyclic variations in combustion parameters. The optical results provided evidence that the characteristics of the early flame development phase have a strong impact on the features in the first part of the signal.
Recommended Content
| Technical Paper | Enhanced Engine Position Acquisition & Treatment |
| Technical Paper | COMBUSTION OF FUELS IN INTERNAL COMBUSTION ENGINES |
| Technical Paper | SOME CRITICAL TECHNICAL ISSUES ON THE STEADY FLOW TESTING OF CYLINDER HEADS |
Authors
Citation
Schneider, D. and Lai, M., "An Investigation of the Impact of Cycle-to-Cycle Variations on the Ionic Current Signal in SI Engines," SAE Technical Paper 2000-01-1943, 2000, https://doi.org/10.4271/2000-01-1943.Also In
References
- Clements R.M. Smy P.R. “The variation of ionization with air/fuel-ratio for a spark-ignition engine” Journal of Applied Physics 47 2 1976
- Reinmann R. Saitzkoff A. Mauss F. “Local Air-Fuel Ratio Measurements Using the Spark Plug as an Ionization Sensor” SAE 970856 SAE International 1997
- Lee A. Pyko J. “Engine Misfire Detection by Ionization Current Monitoring” SAE 95003 SAE International 1995
- Balles E. VanDyne E. Wahl A. Ratton K. Lai M. “In-Cylinder Air/Fuel Ratio Approximation Using Spark Gap Ionization Sensing” SAE 980166 SAE International 1998
- Foerster J. Guenther A. Ketterer M. Wald K. J. “Ion Current Sensing for Spark Ignition Engines” SAE 1999-01-0204 SAE International 1999
- Birch S. “Mercedes' V12 and V8 plans” Automotive Engineering International, SAE International 107 10 October 1999
- Ohashi Y. Koiwa M. Okamura K. Ueda A. “The Application of Ionic current Detection System for the Combustion Condition Control” SAE 1999-01-0550 SAE International 1999
- Schneider D. Lai M.C. “Real-Time Air/Fuel-Ratio Control in a Small SI Engine Using the Ionic Current Signal” SAE 1999-01-3323 SAE International 1999
- Heywood John B. “Internal Combustion Engine Fundamentals” McGraw-Hill, Inc. 1988
- Johansson Bengt “Cycle to Cycle Variations in S.I. Engines-The Effects of Fluid Flow and Gas Composition in the Vicinity of the Spark Plug on Early Combustion” SAE 962084 SAE International 1996