Trustworthy Estimation and Control of Engine Knocking Level for Transient Operation

Bayesian Estimation and Control of Engine Knocking Level for Transient Operation

“…The three properties (smaller IMEP variations, improved efficiency, and limited knock intensities) come from the ability of the proposed controller to maintain the spark advance closer to its ideal value, without constant exploration of its vicinity. Sweeps of the threshold θ have been performed in [15] and show an efficiency gain of 1% at constant knocking frequency. It can be seen that the controller is more sensitive in the protective direction than in the opposite direction, potentially leading to efficiency losses, but far less problematic than failures to protect the engine.…”

“…An implementation based on filters is proposed. Promising properties of the proposed controller were presented in [15], without mathematical derivations. The developed method may give sufficient precision for feedback control and may be suited for the engine transient regimes.…”