单缸EGR发动机压缩比优化及涡轮增压器匹配研究

doi:10.3969/j.issn.10012222.2017.04.012

车用发动机 ›› 2017, Vol. 0 ›› Issue (4) : 59-62. DOI: 10.3969/j.issn.10012222.2017.04.012

栏目

单缸EGR发动机压缩比优化及涡轮增压器匹配研究

马兴兴1,2，马志刚1,2，书海1,2，孙剑1,2，乔静波1,2，崔亚彬,2，宋东先1,2

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Compression Ratio Optimization and Turbocharger Matching for Single Cylinder EGR Engine

MA Xingxing1,2, MA Zhigang1,2, YU Shuhai1,2, SUN Jian1,2，QIAO Jingbo1,2， CUI Yabin1,2， SONG Dongxian1,2

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文章历史 +

摘要

在1台气道喷射单缸EGR发动机上，独立控制EGR缸喷油及点火，实现燃料改质，研究了不同压缩比对发动机性能的影响，此外还匹配了不同涡轮增压器，用于改善外特性扭矩。试验结果表明：单缸EGR能有效改善发动机的燃油经济性，NOx和CO排放性能均所改善，但THC排放恶化，动力性能下降；提高压缩比能有效提高发动机的热效率，降低燃油消耗，但过高压缩比使发动机爆震倾向严重，限制发动机外特性扭矩；通过匹配小涡轮增压器低速扭矩有所改善。

Abstract

The effects of different compression ratios on engine performance were investigated on a single cylinder EGR engine by controlling the injection and ignition separately. Different turbochargers were matched to improve the full torque of each speed. The results show that the single cylinder EGR improves the fuel economy and NOx and CO emissions, but leads to the deterioration of THC emission and total power. Higher compression ratio can improve the engine thermal efficiency efficiently and reduce the fuel consumption, but too high compression ratio will increase the probability of engine knock and limit the torque of external characteristic. In the end, the torque at low speed improves by designing the turbocharger with a small turbine.

导出引用

马兴兴，马志刚，于书海，孙剑，乔静波，崔亚彬，宋东先. 单缸EGR发动机压缩比优化及涡轮增压器匹配研究[J]. 车用发动机. 2017, 0(4): 59-62 https://doi.org/10.3969/j.issn.10012222.2017.04.012

MA Xingxing1,2, MA Zhigang, YU Shuhai, SUN Jian，QIAO Jingbo， CUI Yabin， SONG Dongxian. Compression Ratio Optimization and Turbocharger Matching for Single Cylinder EGR Engine[J]. Vehicle Engine. 2017, 0(4): 59-62 https://doi.org/10.3969/j.issn.10012222.2017.04.012