排气门正时对高比例甲醇-汽油混合燃料燃烧和排放的影响研究

宫艳峰; 钱丁超; 马赫阳; 刘铭礼; 解方喜; 孟祥龙

车用发动机 ›› 2025, Vol. 0 ›› Issue (1) : 12-17.

栏目

排气门正时对高比例甲醇-汽油混合燃料燃烧和排放的影响研究

宫艳峰¹，钱丁超¹，马赫阳¹，刘铭礼¹，解方喜²，孟祥龙²

作者信息 +

Effect of Exhaust Valve Timing on Combustion and Emissions of High Proportional Methanol-Gasoline Blends

GONG Yanfeng¹,QIAN Dingchao¹,MA Heyang¹,LIU Mingli¹,XIE Fangxi²,MENG Xianglong²

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文章历史 +

摘要

采用自行开发的可变气门机构，在高压缩比点燃式发动机上进行了试验，研究了排气门正时对高甲醇掺烧比甲醇-汽油发动机燃烧和性能的影响。结果发现：提前排气门正时会使燃烧开始时刻（CA5）滞后，燃烧持续期延长，结合点火正时后，燃烧相位得到改善；在排气门正时结合最佳点火正时下，等效有效比油耗（b_e）和NO_x排放都得到明显改善，在最佳点火正时下，排气门正时前移可以使M50，M75和M100的最佳b_e分别降低7.39%，11.06%和18.72%，NO_x排放量分别降低34.5%,19.6%和23.9%；提高甲醇添加量可以提高经济性，降低HC排放量。

Abstract

The experiment was conducted on a high-compression ratio spark-ignition engine by using a self-developed variable valve mechanism and the effect of exhaust valve timing on the combustion and performance of methanol/gasoline engines with high volume methanol content was studied. It was found that early timing of exhaust valve would cause CA5 to lag and prolong the combustion duration. Combined with optimal ignition timing，the combustion phase improved. Under the combination of exhaust valve timing and optimal ignition timing, both b_e and NO_x emissions significantly improved. Under the optimal ignition timing, shifting the exhaust valve timing forward could reduce the optimal b_e of M50, M75, and M100 by 7.39%, 11.06%, and 18.72% respectively and NO_x emissions by 34.5%, 19.6%, and 23.9% respectively. Increasing the amount of methanol could also improve fuel economy and reduce HC emissions.

导出引用

宫艳峰，钱丁超，马赫阳，刘铭礼，解方喜，孟祥龙. 排气门正时对高比例甲醇-汽油混合燃料燃烧和排放的影响研究[J]. 车用发动机. 2025, 0(1): 12-17

GONG Yanfeng,QIAN Dingchao,MA Heyang,LIU Mingli,XIE Fangxi,MENG Xianglong. Effect of Exhaust Valve Timing on Combustion and Emissions of High Proportional Methanol-Gasoline Blends[J]. Vehicle Engine. 2025, 0(1): 12-17