Development of ignition method using shock waves for lean burn gas engines

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H02373
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 24020:Marine engineering-related
• Research Institution: Kyushu University
• Principal Investigator: TSURU Dasiuke 九州大学, 総合理工学研究院, 助教 (10614620)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 舶用機関 / ガスエンジン / 火花点火 / 衝撃波

Outline of Final Research Achievements

The behavior of shock waves generated by the spark plug was observed under the same conditions as in gas engines. As a result, it was confirmed that shock waves in the pre-chamber were generated locally with strong density changes due to the interference between shock waves and wall reflected waves. It was also confirmed that shock waves were continuously generated from gas injected at high pressure exceeding 20 MPa.

Free Research Field

機械工学

Academic Significance and Societal Importance of the Research Achievements

ガスエンジンの筒内圧相当条件で衝撃波を副室形状により，反射波より密度変化の大きい波が観測でき、それらを制御できる可能性がある．よって，エンジンの効率向上を阻む原因であるホットスポット由来のノッキング回避へとつながる可能性がある．