[1]李宪宇,潘家营,刘 峰,等.焰前放热对GCI发动机燃烧性能的影响[J].内燃机学报,2021,(06):481-487.
　Li Xianyu,Pan Jiaying,Liu Feng,et al.Effect of Pre-Ignition Heat Release on Combustion Performance of GCI Engines[J].,2021,(06):481-487.
点击复制

焰前放热对GCI发动机燃烧性能的影响
分享到：

《内燃机学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2021年06
页码:
481-487
栏目:
出版日期:
2021-11-25

文章信息/Info

Title:
Effect of Pre-Ignition Heat Release on Combustion Performance of GCI Engines
作者:
李宪宇; 潘家营; 刘 峰; 卫海桥; 刘昌文; 舒歌群
天津大学 内燃机燃烧学国家重点实验室，天津 300072
Author(s):
Li Xianyu;  Pan Jiaying;  Liu Feng;  Wei Haiqiao;  Liu Changwen;  Shu Gequn
State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
关键词:
汽油压燃; 焰前放热; 辛烷值敏感度; 进气条件; 燃烧相位
Keywords:
gasoline compression ignition;  pre-ignition heat release;  octane sensitivity;  intake conditions; combustion phase
分类号:
TK437
文献标志码:
A
摘要:
汽油压燃(GCI)发动机燃用低辛烷值(RON=60～80)燃料时具有更佳的燃烧和排放性能.低辛烷值燃料具有低温反应特性，存在明显的焰前放热现象，对发动机着火及燃烧过程产生重要作用.基于一台高压缩比单缸机，选用研究法辛烷值为75的甲苯标准参考燃料(TPRF)，研究了不同喷油时刻、进气温度、进气压力和辛烷值敏感度下的焰前放热特性及其对GCI发动机燃烧性能的影响.结果表明：当喷射时刻提前至上止点前90°CA以上时存在明显的焰前放热现象；提高进气压力(0.10～0.13 MPa)或降低进气温度(85～20℃)会促进低温化学反应，焰前放热增强，在负温度系数区域，提高进气温度会使滞燃期延长，主燃烧相位滞后；降低燃料辛烷值敏感度会提高混合气低温反应活性，促进焰前放热重心及主燃烧相位提前.
Abstract:
Abstract: Gasoline compression ignition (GCI) engines have better combustion and emission performance when fueled with low-octane number(RON=60—80) fuels. However, low-octane number fuels with low-temperature reactions are manifested by the obvious pre-ignition heat release, which affects the ignition and combustion processes of GCI engines. In this work, a single-cylinder engine with high compression ratio and toluene primary reference fuels(TPRF) RON=75 was employed, and the influence of injection timing, intake temperature, intake pressure and octane sensitivity on the pre-ignition heat release and thereby combustion performance of GCI engines were investigated. The results show that the pre-ignition release behavior occurs when the injection time is advanced to the crank angle of earlier than 90° CA. Elevating intake pressures(0.10—0.13 MPa) and decreasing intake temperatures (85—20 MPa) can enhance low-temperature reactions and improve the magnitude of pre-ignition heat release. In the negative temperature coefficient region, increasing the intake temperatures can prolong the ignition delay period and slow the combustion phase. The decrease of octane sensitivity improves the low-temperature reactivity of fuels, which facilitates the advancement of pre-ignition heat release center and main combustion phase.

相似文献/References:

[1]祝宇轩,王 浒,张翔宇,等.汽油压燃小负荷燃烧过程优化策略研究[J].内燃机学报,2016,(05):415.
　ZHU Yu-xuan,WANG Hu,ZHANG Xiang-yu,et al.Study of gasoline compression ignition (GCI) low-duty combustion optimization based on double exhaust valve opening and injection strategy[J].,2016,(06):415.
[2]刘佳林,王 浒,郑尊清,等.PODEn对汽油压燃燃烧过程与排放的影响[J].内燃机学报,2018,(02):97.
　Liu Jialin,Wang Hu,Zheng Zunqing,et al.Effects of PODEn on Combustion and Emission in Gasoline Compression Ignition Combustion Mode[J].,2018,(06):97.
[3]张庆朋,应 华,俞林君,等.喷油策略对混合燃料压燃模式排放物的影响[J].内燃机学报,2018,(03):193.
　Zhang Qingpeng,Ying Hua,Yu Linjun,et al.Effect of Injection Strategy on Emission Characteristics of Compression Ignition Engine Fueled with Blended Fuel[J].,2018,(06):193.
[4]展亮亮,张延志,钟汶君,等.加氢催化生物柴油对GCI 发动机燃烧与排放影响[J].内燃机学报,2020,(02):119.
　Zhan Liangliang,Zhang Yanzhi,Zhong Wenjun,et al.Effect of Hydrogenation Catalyzed Biodiesel on Combustion and Emissions of GCI Engines[J].,2020,(06):119.
[5]韩义勇,华剑雄,王利民,等.汽油压燃发动机的爆震特性试验[J].内燃机学报,2021,(01):18.
　Han Yiyong,Hua Jianxong,et al.Experimental Investigation on Knock Characteristics of a Gasoline Compression Ignition Engine[J].,2021,(06):18.
[6]郑尊清,刘 威,马桂香,等.喷射策略对GCI大负荷拓展影响的数值模拟[J].内燃机学报,2021,(04):297.
　Zheng Zunqing,Liu Wei,Ma Guixiang,et al.Numerical Study of the Effects of Injection Strategies on High Load Extension of Gasoline Compression Ignition[J].,2021,(06):297.

更新日期/Last Update: 2021-11-25