Relationship between Mass Burnt Fraction 50% Crank Angle and Low-Frequency Components in Cylinder Pressure When Ignition Timing Was Delayed
点火時期を遅角させた場合の質量燃焼割合50%クランク角度と指圧波形中の低次周波数成分との関係
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- Publication code
- 20264171
- Paper/Info type
- JSAE Transaction
Vol.57 No.2
- Pages
- 220-225(Total 6 p)
- Date of publication
- Mar 2026
- Publisher
- JSAE
- Language
- Japanese
Detailed Information
| Category(J) | 論文 Translation |
|---|---|
| Category(E) | Paper |
| Author(J) | 1) 長島 慶一, 2) 土屋 一雄 |
| Author(E) | 1) Keiichi Nagashima, 2) Kazuo Tsuchiya |
| Affiliation(J) | 1) (株)本田技術研究所, 2) 明治大学 |
| Abstract(J) | 機関保護や排気触媒早期活性目的で点火遅角すると，2山指圧波形になることがある．このような2山波形でも，質量燃焼割合50%クランク角度と低次sin成分振幅bkには相関性が確認できた.またこの場合，bkが負となることがあるが，bk算出式中のsin波部分が負になる時期の圧力が高いことで生じる． Translation |
| Abstract(E) | When the ignition timing was delayed for the purpose of engine protection or early activation of the exhaust catalyst, cylinder pressure with two peaks might occur. A correlation between the crank angle at 50% mass burnt fraction and the amplitude of the low-order sine wave frequency component (bk) was also observed in the cylinder pressure with two peaks. In addition, bk might become negative. It is caused by the high cylinder pressure in the calculation section where the part of the bk calculation equation is negative. |
