Closed Loop Control of Spark Advance Using a Cylinder Pressure Sensor

[+] Author and Article Information
M. Hubbard

Department of Mechanical Engineering, University of California, Davis, Calif.

P. D. Dobson, J. D. Powell

Guidance and Control Laboratory, Department of Mechanical Engineering, Stanford University, Stanford, Calif.

J. Dyn. Sys., Meas., Control 98(4), 414-420 (Dec 01, 1976) (7 pages) doi:10.1115/1.3427059 History: Received October 08, 1976; Online July 13, 2010


The objective of the spark advance control technique discussed in this paper is to provide a schedule which is optimum in the presence of changing engine and environmental conditions. The paper shows the benefits of adaptable spark control, describes the ability of a cylinder pressure based system to adapt to optimum spark on a single cylinder laboratory engine and describes the transient performance of a controller mechanized in the laboratory. Averaged over the entire engine speed-load operating regime, the closed loop system yields average brake horsepower within 0.1 percent of optimum based solely on the cylinder pressure information. The system has demonstrated a transient settling time of 0.1 second.

Copyright © 1976 by ASME
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