Cycle-by-cycle variations in a spark ignition engine fueled with natural gas-hydrogen blends combined with EGR (PDF)
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Cycle-by-cycle variations in a spark ignition engine fueled with natural gas-hydrogen blends combined with EGR (PDF)
- 发表刊物：
- Int J Hydrogen Energy
- 摘要：
- Study of cycle-by-cycle variations in a spark ignition engine fueled with natural gas-hydrogen blends combined with exhaust gas recirculation (EGR) was conducted. The effects of EGR ratio and hydrogen fraction on engine cycle-by-cycle variations are analyzed. The results show that the cylinder peak pressure), the maximum rate of pressure rise and the indicated mean effective pressure decrease and cycle-by-cycle variations increase with the increase of EGR ratio. Interdependency between the above parameters and their corresponding crank angles of cylinder peak pressure is decreased with the increase of EGR ratio. For a given EGR ratio, combustion stability is promoted and cycle-by-cycle variations are decreased with the increase of hydrogen fraction in the fuel blends. Non-linear relationship is presented between the indicated mean effective pressure and EGR ratio. Slight influence of EGR ratio on indicated mean effective pressure is observed at low EGR ratios while large influence of EGR ratio on indicated mean effective pressure is demonstrated at high EGR ratios. The high test engine speed has lower cycle-by-cycle variations due to the enhancement of air flow turbulence and swirls in the cylinder. Increasing hydrogen fraction can maintain low cycle-by-cycle variations at high EGR ratios.
- 合写作者：
- Huang B, Hu EJ, Huang ZH, Zheng JJ
- 卷号：
- 2009, 34(19): 8405-8414
- 页面范围：
- 8405-8414
- 是否译文：
- 否
- 发表时间：
- 2009-09-24