| 摘要:根据远洋船舶航行特点，构想了一种基于可变热力循环，使气体发动机能够兼具高压气体发动机和低压气体发动机优点的Tier Ⅲ排放方案。希望通过天然气预混合、可变压缩比、引燃优化、燃烧速率控制、空燃比控制等技术的组合应用，实现均质稀薄燃烧，降低NOx排放，使高压气体发动机在不使用EGR和后处理技术的情况下，达到IMO Tier Ⅲ标准。 |
| 关键词: 可变热力循环 气体发动机 均质稀薄燃烧 氮氧化物 |
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| The Outlook of IMO Tier Ⅲ Solution for Gas Engine Based on Variable Thermodynamic Cycle |
| Wang Min,Yu Hongliang,Wen Miaomiao,Zhang Ling |
| China Classification Society, Liaoning Dalian 116013;Dalian Ocean University，Liaoning Dalian 116023;China Classification Society, Shanghai 200135;China Classification Society, Beijing 100007 |
| Abstract:Based on the characteristics of ocean-going ships, a Tier Ⅲ compliant scheme that allows gas engines to combine the advantages of high-pressure gas engines and low-pressure gas engines through variable thermodynamic cycle is conceived. Several technologies are combined, including natural gas premixing, variable compression ratio, pilot optimization, combustion rate control and air-fuel ratio control, to achieve homogeneous lean-burn and reduce nitrogen oxide emissions, and enable high-pressure gas engines to achieve IMO Tier Ⅲ standards without EGR or after-treatment technologies. |
| Key words: variable thermodynamic cycle gas engine homogeneous lean-burn nitrogen oxide |
