Bayesian Estimation and Control of Engine Knocking Level for Transient Operation

Jean, Maxime; Leroy, Thomas; Vidal-Naquet, Fabien

doi:10.1109/tcst.2021.3081378

Cited by 6 publications

(3 citation statements)

References 33 publications

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“…where i max , i min correspond to the upper and lower constraints of the controller. Together, ( 24), (25), define an extended state transition matrix using the same expression (19) given previously, and the closed loop distribution and associated statistics then follow directly from (5) to (8).…”

Section: Retard-only Strategymentioning

confidence: 99%

“…These include, for example, cumSum, 10 likelihood, [11][12][13] log-normal [14][15][16] and most recently Bayesianbased strategies. [17][18][19] However, despite the potential benefits of these new approaches, many production strategies still employ a more traditional or classical form of knock control. One possible reason for the persistence of these controllers is their long track record and proven robustness across a broad range of engine types, operating conditions and fuels.…”

Section: Introductionmentioning

confidence: 99%

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A comparative study of fixed-gain classical knock control strategies

Jones

Patel

2023

International Journal of Engine Research

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Classical knock control strategies are still widely used in production vehicles but exist in several variant forms whose performance with respect to one another, and to engine efficiency, ease of calibration and analytical tractability has not been rigorously evaluated. This paper examines the absolute and relative performance of these strategies subject to both transient and systematic disturbances using both time history simulation methods and analytical methods. The former illustrates the response to specific instances of the knock process, while the latter enables the statistical properties of the closed loop response to be computed and compared.

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Section: Retard-only Strategymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A comparative study of fixed-gain classical knock control strategies

Jones

Patel

2023

International Journal of Engine Research

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“…Despite a growing number of advanced event-based [1][2][3][4] or intensity-based [5][6][7][8][9] knock control system designs, the majority of production vehicles still employ some variant of a classical knock control strategy where the spark is retarded sharply whenever knock events occur, or advanced gradually after non-knocking cycles. These strategies are simple and robust, but the relative merits and demerits of the different variants have only recently begun to be investigated.…”

Section: Introductionmentioning

confidence: 99%

A critical analysis of classical severity-based knock control strategies

Jones

Patel

2023

International Journal of Engine Research

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A common variant of classical knock control strategies replaces fixed magnitude control moves with control actions that depend on the knock severity of the prior cycle. Though appealing to notions of proportional control, it is unclear whether such strategies offer benefit given the random nature of knock events. In this paper a new generalized event-based framework is developed and used to extend both time domain simulation and stochastic analysis methods for analyzing the closed loop behavior of such systems. These tools are then used to perform a rigorous analysis and comparison between standard advance-retard and severity-based control strategies. The analysis is also repeated using a lower knock threshold definition. The results show that the performance of severity-based knock control differs minimally from a similarly tuned standard advance-retard controller, and there is little benefit to recompense the additional complexity of severity-based control.

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