Local equivalence ratio measurement at inhomogeneous field in pre-chamber natural gas engine
副室式天然ガスエンジンにおける不均一場の局所当量比計測
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20214853
- Paper/Info type
- Symposium Text
- Pages
- 1-6(Total 6 p)
- Date of publication
- Dec 2021
- Publisher
- JSAE & JSME
- Language
- Japanese
Detailed Information
| Author(J) | 1) 宮尾 康平, 2) 河原 伸幸 |
|---|---|
| Author(E) | 1) Kohei Miyao, 2) Nobuyuki Kawahara |
| Affiliation(J) | 1) 岡山大学, 2) 岡山大学 |
| Affiliation(E) | 1) Okayama University, 2) Okayama University |
| Abstract(J) | 本研究の目的は，副室内の不均一場における点火プラグ近傍当量比計測の高精度化である．手法としてSIBS法を用いた．不均一場は副室を模擬した圧縮膨張機関において，筒内直噴により形成している．当量比計測は，予混合気を用いた分光計測により，燃料由来原子と空気由来原子の発光強度比を算出して，当量比との校正曲線を作成することで可能となる．不均一さが異なる場で計測した当量比を比較し，精度検証を行った． Translation |
| Abstract(E) | The purpose of this study is to measure the local equivalence ratio near the spark plug in the heterogeneous field formed by natural gas and air mixture in a pre-chamber. In the compression expansion machine, the measurement conditions were optimized, a calibration curve was evaluated under the homogeneous field formed by premixed mixture, and the local equivalence ratio was measured at inhomogeneous field formed by fuel injection using the spark-induced breakdown spectroscopy (SIBS). High intensity emission spectra were obtained by sharpening the cathode shape to stabilize the spark discharge. The measurement accuracy was improved by short exposure time (10μs). Early fuel injection formed the homogeneous mixture around the spark plug. |
