Journal
ENERGY
Volume 122, Issue -, Pages 1-10Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2017.01.065
Keywords
Lean-burn; Spark advance; Self-optimization; Knock control
Categories
Funding
- Council for Science, Technology and Innovation (CSTI)
- Cross ministerial Strategic Innovation Promotion Program (SIP)
- Innovative Combustion Technology (Funding agency: JST)
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In this paper, a spark advance self-optimization strategy is presented for lean-burn operation mode of spark-ignition (SI) engine which aims on-board combustion phase tuning to achieve high efficiency under a probability constraint of knocking events. Firstly, the effects of spark advance (SA) on combustion phase under lean-condition are analyzed in a statistical perspective based on experiments. Then, based on conclusion of the analysis, a SA control scheme, which combines extremum seeking loop with likelihood-based knock limit control loop, is proposed to optimize SA for maximal fuel economy with knock probability threshold. Finally, experimental validation results are demonstrated that are conducted on a test bench with a V6 commercial SI engine. (C) 2017 Elsevier Ltd. All rights reserved.
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