Closed-Loop Combustion Control by Extremum Seeking with the Passive-Chamber Ignition Concept in SI Engines

Novella, Ricardo; Plá, Benjamín; Bares, Pau

doi:10.4271/2020-01-1142

Cited by 4 publications

(3 citation statements)

References 31 publications

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“…By adopting proper phenomenological sub-models for in-cylinder turbulence and combustion, the 0D/1D simulation is capable of investigating a large number of operating conditions with reduced computational effort. Aims of 0D and 1D simulation include preliminary prechamber design, identification of operating conditions, providing boundary conditions for 3D CFD simulation, understanding observed trends from engine experiments, and engine control purposes [105,106].…”

Section: Simulation Researchmentioning

confidence: 99%

A review of the pre-chamber ignition system applied on future low-carbon spark ignition engines

Zhu

Akehurst

Yuan

2022

Renewable and Sustainable Energy Reviews

101

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Section: Simulation Researchmentioning

confidence: 99%

A review of the pre-chamber ignition system applied on future low-carbon spark ignition engines

Zhu

Akehurst

Yuan

2022

Renewable and Sustainable Energy Reviews

101

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“…Turbulent Jet Ignited (TJI) combustion: A classical configuration of SI engine was modified to include a passive pre-chamber in a single-cylinder research configuration to analyze the potential of such combustion mode (TJI). 30 The engine was run at three engine speeds, namely 1350, 2000, and 3000 rpm. At each engine speed the injected fuel, the intake pressure and the spark timing were varied, ranging from misfires to maximum efficiency operation (60,468 cycles).…”

Section: Experimental Set-upmentioning

confidence: 99%

In-cylinder pressure smart sampling for efficient data management

Plá

Morena

Bares

et al. 2022

International Journal of Engine Research

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The present paper proposes an optimized algorithm for minimizing the amount of data processed in order to maintain all critical information from the in-cylinder pressure sensor but with minimum computational cost. The algorithm uses singular value decomposition (SVD) for reducing the number of samples and pivoting QR decomposition to identify the optimal sampling locations. Experimental data from four engines with different combustion modes, namely Spark ignition (SI), Compression ignition (CI), turbulent jet ignition (TJI), and dual fuel ignition (DFCI), was used to validate the algorithm. The impact of the different sampling methodologies on different metrics for engine performance has been addressed and studied showing negligible information loss when reducing to 25 samples per cycle the acquisition buffer size.

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“…Gradient based algorithms such as extremum seeking were used in spark ignition engines to optimize the engine efficiency by controlling the spark advance timing [21][22][23]. Lewander et al [24] applied an extremum seeking controller to a diesel engine where an optimal combustion phasing reference was evaluated and tracked to provide the best indicated efficiency.…”

Section: Introductionmentioning

confidence: 99%

On-Line Optimization of Dual-Fuel Combustion Operation by Extremum Seeking Techniques

Plá

Bares

Barbier

et al. 2021

SAE Technical Paper Series

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Dual-fuel combustion engines have shown the potential to extend the operating range of Homogeneous Charge Compression Ignition (HCCI) by using several combustion modes, e.g. Reactivity Controlled Compression Ignition (RCCI) at low/medium load, and Partially Premixed Compression Ignition (PCCI) at high load. In order to optimize the combustion mode operation, the respective sensitivity to the control inputs must be addressed. To this end, in this work the extremum seeking algorithm has been investigated. By definition, this technique allows to detect the control input authority over the system by perturbing its value by a known periodic signal. By analyzing the system response and calculating its gradient, the control input can be adjusted to reach optimal operation. This method has been applied to a dual-fuel engine under fully, highly and partially premixed conditions where the feedback information was provided by incylinder pressure and NOx sensors. The gasoline fraction and the injection timing were selected as control inputs and an extremum seeking controller was designed and verified to optimize brake efficiency by tracking the ideal combustion phasing and to reduce NOx emissions as well.

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Closed-Loop Combustion Control by Extremum Seeking with the Passive-Chamber Ignition Concept in SI Engines

Cited by 4 publications

References 31 publications

A review of the pre-chamber ignition system applied on future low-carbon spark ignition engines

A review of the pre-chamber ignition system applied on future low-carbon spark ignition engines

In-cylinder pressure smart sampling for efficient data management

On-Line Optimization of Dual-Fuel Combustion Operation by Extremum Seeking Techniques

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