压端与涡端旁通对Soot排放差异的影响研究

李宣陶; 吴怡; 闫妍; 左子农; 韩志强; 王健

车用发动机 ›› 2025, Vol. 0 ›› Issue (1) : 27-33.

栏目

压端与涡端旁通对Soot排放差异的影响研究

李宣陶¹，吴怡^2，3，4，闫妍^2，3，4，左子农^2，3，4，韩志强^2，3，4，王健⁵

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Influence of Compressor-End and Turbine-End Bypass on Soot Emission

LI Xuantao¹，WU Yi^2，3，4，YAN Yan^2，3，4，ZUO Zinong^2，3，4，HAN Zhiqiang^2，3，4，WANG Jian⁵

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文章历史 +

摘要

针对WP12重型柴油机，试验研究了两级增压系统中压端与涡端旁通引起的滞燃期、峰值缸温、燃氧当量比差异导致的Soot排放差异。结果表明，两种不同的旁通方式可以达到近乎相同的进气压力，在本试验工况下，压端旁通Soot排放要明显高于涡端旁通Soot排放，其Soot排放差异随进气压力的增大先增加后减少。涡端旁通滞燃期比压端旁通滞燃期更长，但滞燃期差异变化很小，且与Soot排放差异相关系数较低，为0.35。压端旁通峰值缸温要明显高于涡端旁通峰值缸温，在高进气压力下，峰值缸温差异对Soot排放差异作用更显著，且峰值缸温差异与Soot排放差异相关系数最大，为0.95。压端旁通燃氧当量比要高于涡端旁通燃氧当量比，说明涡端旁通可以拥有更大的进气流量，在低进气压力下，燃氧当量比差异对Soot排放差异作用更显著，且燃氧当量比差异与Soot排放差异相关系数较大，为0.75。

Abstract

The study was conducted on a WP12 heavy-duty diesel engine to investigate the impact of bypass at the compressor-end and the turbine-end of a two-stage turbocharging system on ignition delay, peak cylinder temperature, and fuelair equivalence ratio, and the influence of their differences on soot emission. The results indicated that both bypass methods could achieve nearly the same intake pressure. Under the test conditions, the soot emission with compressor-end bypass was significantly higher than that with the turbine-end bypass. The difference of soot emission first increased and then decreased with the increase of intake pressure. The ignition delay of the turbineend bypass was longer than that of the compressor-end bypass, but the difference change in ignition delay was small. The correlation coefficient between ignition delay and soot emission was only 0.35. The peak cylinder temperature with the compressor-end bypass was notably higher than that with the turbine-end bypass. At high intake pressures, the difference of peak cylinder temperature had a more pronounced effect on soot emission, with a maximum correlation coefficient of 0.95. The fuel-air equivalence ratio with the compressor-end bypass was higher than that with the turbine-end bypass, which indicated that the turbine-end bypass allowed a greater intake flow. At low intake pressures, the difference of fuelair equivalence ratio had a more significant impact on soot emission, with a large correlation coefficient of 0.75.

导出引用

李宣陶，吴怡，闫妍，左子农，韩志强，王健. 压端与涡端旁通对Soot排放差异的影响研究[J]. 车用发动机. 2025, 0(1): 27-33

LI Xuantao，WU Yi，YAN Yan，ZUO Zinong，HAN Zhiqiang，WANG Jian. Influence of Compressor-End and Turbine-End Bypass on Soot Emission[J]. Vehicle Engine. 2025, 0(1): 27-33