汽车工程 ›› 2021, Vol. 43 ›› Issue (11): 1638-1644.doi: 10.19562/j.chinasae.qcgc.2021.11.009

• • 上一篇    下一篇

瞬态工况下掺混PODE对混合动力柴油机排放特性的影响

陈东东,王铁(),李国兴,乔天佑,侯振宁   

  1. 太原理工大学车辆工程系,太原  030024
  • 收稿日期:2021-04-07 出版日期:2021-11-25 发布日期:2021-11-22
  • 通讯作者: 王铁 E-mail:wangtie57@163.com
  • 基金资助:
    国家自然科学基金(51805335);山西省重大专项(201811020006);山西省研究生创新项目(2021Y165)

Effect of PODE Mixing on Emission Characteristics of Hybrid Diesel Engines Under Transient Conditions

Dongdong Chen,Tie Wang(),Guoxing Li,Tianyou Qiao,Zhenning Hou   

  1. Department of Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024
  • Received:2021-04-07 Online:2021-11-25 Published:2021-11-22
  • Contact: Tie Wang E-mail:wangtie57@163.com

摘要:

为了研究掺混聚甲氧基二甲醚(PODE)对混合动力柴油机瞬态排放的影响,本文基于单轴并联式混合动力试验平台,分别燃用0#柴油和PODE体积比为10%和20%的柴油/PODE掺混燃料,试验瞬态工况为柴油机转速为1 900 r/min,油门从25%变化到35%,过渡时间分别为0、2和5 s的瞬变工况和800 r/min拖动快速起动工况。结果表明:恒转速变油门工况下,随着过渡时间的减小,其变化过程中的累计NOx和Soot排放峰值都有所增大,随着PODE比例的增大,Soot排放的瞬态畸变先增强后减弱。相比燃用0 #柴油,燃用柴油/PODE掺混燃料时,瞬变过程中的NOx累加排放值增大,但Soot排放峰值大幅下降,过渡时间为0 s时,Soot排放峰值分别降低37%和63%;过渡时间为2 s时,Soot排放峰值分别降低31%和59%;过渡时间为5 s时,Soot排放峰值分别降低34%和57%。在快速起动工况下,相比燃用0#柴油,燃用柴油/PODE掺混燃料时,起动过程中的CO排放峰值分别降低10%和26%,Soot排放峰值降低53%和60%,而NOx排放的变化不大。

关键词: 混合动力柴油机, 聚甲氧基二甲醚, 瞬态工况, 快速起动, 排放

Abstract:

In order to study the effect of Polyoxymethylene ether (PODE) mixing on the transient emissions of hybrid diesel engines, based on a single-shaft parallel hybrid test platform, this paper uses 0# diesel and diesel/PODE fuel mixture with PODE in volume ratios of 10% and 20% respectively. The test transient conditions are that the diesel engine speed is 1 900 r/min and the throttle changes from 25% to 35% with the transient working conditions of 0, 2 and 5 s transition time and 800 r/min drag dynamic quick start conditions. The results show that under constant speed and variable throttle conditions, as the transition time decreases, the cumulative NOx and Soot emission peaks during the change process increase. With the increase of the PODE ratio, the transient distortion of Soot emission first increases and then decreases. Compared with burning 0# diesel, when burning diesel/PODE fuel mixture, the cumulative NOx emission value during the transient process increases, but the Soot emission peak value drops significantly. When the transition time is 0 s, the Soot emission peak value is reduced by 37% and 63% respectively. When the transition time is 2 s, the peak Soot emission is reduced by 31% and 59%, respectively; when the transition time is 5 s, the peak Soot emission is reduced by 34% and 57%, respectively. Under fast starting conditions, compared to burning 0# diesel, when burning diesel/PODE fuel mixture, the peak CO emission during the starting process is reduced by 10% and 26% respectively, and the peak Soot emission is reduced by 53% and 60% . The change of NOx emission is not significant.

Key words: hybrid diesel engine, Polyoxymethylene dimethyl ether, transient conditions, quick start, emission