高精度エンドガス自着火予測モデルの開発（第7報）
Development of High-Accuracy End-Gas Autoignition Prediction Model (Seventh Report)
- 提供方法
- 他サイトにて提供・販売
- 入手方法の確認はこちら
- 文献番号
- 20224595
- 文献・情報種別
- 自動車技術会論文集
Vol.53 No.6
- 掲載ページ
- 1178-1185(Total 8 p)
- 発行年月
- 2022年 11月
- 出版社
- (公社)自動車技術会
- 言語
- 日本語
書誌事項
| カテゴリ | 研究論文 |
|---|---|
| カテゴリ（英） | ResearchPaper 翻訳 |
| 著者 | 1) 桑原 一成, 2) 田中 光太郎 |
| 著者（英） | 1) Kazunari Kuwahara, 2) Kotaro Tanaka |
| 勤務先 | 1) 大阪工業大学, 2) 茨城大学 |
| 抄録 | 第2報で構築した着火遅れ時間総括式を、適用可能条件を高圧力側に拡大するために修正する。第4報で遡り型Livengood-Wu積分により効果的な誤差補正が可能なことを提案したが、反復計算が必要であることが問題である。反復計算を必要としない誤差補正方法を提案する。自着火予測モデルをノッキング発生時期実験結果の予測に適用し、問題点を洗い出す。 |
| 抄録（英） | A high-accuracy knocking prediction model with low computational loads is necessary to develop thermal-efficiency improvement technologies for SI engines efficiently using computational techniques. Livengood-Wu integral has been applied widely as the simplest model for predicting knocking. In the previous reports, ignition delay time equations for a premium-gasoline surrogate fuel were developed to reproduce the temperature-, pressure-, equivalence ratio-, and EGR-dependences of ignition delay time produced using a detailed reaction mechanism. “Reverse Livengood-Wu integral” using an error correction equation was proposed to cancel the advances of timing predicted using Livengood-Wu integral with the ignition delay time equations, from ignition timing produced using the detailed reaction mechanism. The reverse Livengood-Wu integral requires iterative calculation to seek the correct ignition timing. In the present report, it has been found that ignition delay times using the equations are shorter than those using the detailed reaction mechanism with the high initial pressures over 6 MPa. Therefore, the ignition delay time equations have been revised for the expansion of those application conditions to 12 MPa. Also, a new equation has been developed to correct the prediction errors without iterative calculation. It has been investigated whether autoignition prediction using these equations can be effective or not in predicting experimental knocking occurrence timings in an SI engine. The difference of several % in estimating unburned-zone temperature causes the difference of several crank angle degrees in predicting autoignition timing. 翻訳 |
