Improvement of Spark Ignition Knock Detector Performance by Learning Control

System identification of the smoke opacity vs fuel metering in a diesel engine

“…The maintenance of performance over the lifetime of a diesel engine is one of the most difficult problems since changes in component characteristics due to aging, corrosion, or other factors can not be accomplished with a standard conventional controller (Sweet, 1982). A general approach to the problem of severe dynamic changes is the use of an adaptive control system, such as adaptive diesel speed control by Wellstead (1981) and the knock adaptive improvement in spark ignition engine by Sawada and Shigematsu (1981). Adaptive control systems are generally defined to include all types of control strategies that are modified to account for parametric variations in the system, preserving uniformity of overall system characteristics.…”