A low-complexity virtual sensor for the pressure peak position of the crank angle in a spark-ignited car motor is proposed. The algorithm estimates the pressure peak position from the ion current, measured from the spark plug. The complexity of the algorithm is an order of magnitude smaller than any other proposed schemes. Still, performance is not sacrificed. Closed-loop control is demonstrated on a SAAB 9000 driven on the highway.
A Simple Virtual Sensor for Combustion Timing
Contributed by the Dynamic Systems, Measurement, and Control Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received by the ASME Dynamic Systems and Control Division March 12, 2002; final revision, November 11, 2002. Associate Editor: A. Alleyne.
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Holmberg, U., and Hellring, M. (September 18, 2003). "A Simple Virtual Sensor for Combustion Timing ." ASME. J. Dyn. Sys., Meas., Control. September 2003; 125(3): 462–467. https://doi.org/10.1115/1.1589034
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