DIGITALES ADAPTIVES REGELUNGSSYSTEM UND -VERFAHREN, INSBESONDERE FUER EINEN VERBRENNUNGSMOTOR

摘要

A digital adaptive regulation system, eg for an i.c. engine, comprises a regulation loop 12.1, 14, 16.2, 11, 10 by means of which a measured parameter such as exhaust oxygen concentration measured at 12.1 is held constant against a preliminary control valve VS. The preliminary control valve is obtained by addressing table 13 with parameter values alpha , n such as throttle angle and engine speed. The adaptive system 15 corrects the preliminary control valve at 16.1 using learnt correction values in each range of parameter values alpha , n. A new learning value is stored at 17 each time the parameter value range is visited, and a corresponding counter 20 is incremented at the same time. At intervals, for example when starting the engine, learning values with counters below a predetermined threshold (ie poorly adapted) are updated by calculation from other learnt values in adjacent parameter value ranges. Also, the counter values which are low, or all counter values may be reset below the predetermined threshold at intervals to allow repeated updating by calculation. <IMAGE>