点火时刻对甲醇发动机燃烧及非法规排放的影响

宫长明1; 宫宝利2; 彭乐高3; 孙景震2; 李朝晖4; 屈翔4; 刘凤华1

doi:10.3969/j.issn.1001-2222.2017.06.005

车用发动机 ›› 2017, Vol. 0 ›› Issue (6) : 25-29. DOI: 10.3969/j.issn.1001-2222.2017.06.005

栏目

点火时刻对甲醇发动机燃烧及非法规排放的影响

宫长明¹，宫宝利²，彭乐高³，孙景震²,李朝晖⁴,屈翔⁴,刘凤华¹

作者信息 +

Effects of Ignition Timing on Combustion and Noncompulsory Emission of Methanol Engine

GONG Changming¹，GONG Baoli²,PENG Legao³，SUN Jingzhen²，LI Zhaohui⁴，QU Xiang⁴，LIU Fenghua¹

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文章历史 +

摘要

针对甲醇发动机低温冷起动困难，在1台由1130单缸柴油机改造而成的直喷火花点火甲醇发动机上，利用CFD模拟软件AVLFire耦合甲醇氧化反应机理，通过电热塞将进气温度加热到283 K，研究了点火时刻对甲醇发动机低温（266 K）冷起动燃烧及非法规排放的影响。结果表明：提前点火时刻能够使缸内混合气得到较充分燃烧，减少未燃甲醇排放，当点火时刻由8°BTDC提前到11°BTDC时未燃甲醇排放显著减少；提前点火时刻能够降低甲醛排放，当点火时刻提前到17°BTDC、缸内最高燃烧温度超过1 300 K时，甲醛快速氧化，甲醛排放显著减少。

Abstract

For the cold start problem of methanol engine, one 1130 singlecylinder diesel engine was retrofitted to direct injection spark ignition methanol engine and the influences of ignition timing on methanol combustion and noncompulsory emission during cold start at 266 K were researched by simulating the oxidation reaction mechanism of methanol with AVLFire software and preheating the intake to 283 K with the electric heater plug. The simulation results show that advancing the ignition timing can improve the combustion and reduce the unburned methanol emission. When the ignition timing advances from 8°CA BTDC to 11°CA BTDC, the unburned methanol emission decreases remarkably. Moreover, formaldehyde oxidizes rapidly and its emission decreases obviously when the ignition timing is 17°CA BTDC and the incylinder peak temperature is beyond 1 300 K.

导出引用

宫长明1，宫宝利2，彭乐高3，孙景震2,李朝晖4,屈翔4,刘凤华1. 点火时刻对甲醇发动机燃烧及非法规排放的影响[J]. 车用发动机. 2017, 0(6): 25-29 https://doi.org/10.3969/j.issn.1001-2222.2017.06.005

GONG Changming1，GONG Baoli2,PENG Legao3，SUN Jingzhen2，LI Zhaohui4，QU Xiang4，LIU Fenghua1. Effects of Ignition Timing on Combustion and Noncompulsory Emission of Methanol Engine[J]. Vehicle Engine. 2017, 0(6): 25-29 https://doi.org/10.3969/j.issn.1001-2222.2017.06.005