An Analysis on Cycle-by-cycle Variation and Trace-knock using a Turbulent Combustion Model Considering a Flame Propagation Mechanism

Taizo Kitada, Takayuki Shirota, Shinji Hayashi, Dai Tanaka, Masato Kuchita, Yasuyuki Sakai, Yukihide Nagano, Toshiaki Kitagawa

研究成果: Contribution to journalConference article査読

抄録

Gasoline engines have the trace-knock phenomena induced by the fast combustion which happens a few times during 100 cycles. And that constrains the thermal efficiency improvement due to limiting the ignition timing advance. So the authors have been dedicating a trace-knock simulation so that we could obtain any pieces of information associated with trace-knock characteristics. This simulation consists of a turbulent combustion model, a cycle-by-cycle variation model and a chemical calculation subprogram. In the combustion model, a combustion zone is considered in order to obtain proper turbulent combustion speed through wide range of engine speed. From a cycle-by-cycle variation analysis of an actual gasoline engine, some trace-knock features were detected, and they were involved in the cycle-by-cycle variation model. And a reduced elementary reaction model of gasoline PRF (primary reference fuel) was customized to the knocking prediction, and it was used in the chemical calculation. Through the trace-knock simulation, some advantages of the cycle-by-cycle variation model and the chemical reaction calculation became obvious. In this paper, the details of these calculation methods are described, and the advantages of this calculation are discussed.

本文言語英語
ジャーナルSAE Technical Papers
December
DOI
出版ステータス出版済み - 12 19 2019
イベント2019 JSAE/SAE Powertrains, Fuels and Lubricants International Meeting, JSAE 2019 - Kyoto, 日本
継続期間: 8 26 20198 29 2019

All Science Journal Classification (ASJC) codes

  • 自動車工学
  • 安全性、リスク、信頼性、品質管理
  • 汚染
  • 産業および生産工学

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