DOC对柴油机颗粒物排放影响的试验研究  

Experimental Investigation on the Influence of DOC on Diesel Engine Particle Emission

作　　者：孟忠伟[1] 张川[1] 李路[1] 张文强[1] 陈超[1] 

机构地区：[1]西华大学汽车与交通学院汽车测控与安全四川省重点试验室,成都610039

出　　处：《内燃机工程》2017年第2期67-72,共6页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(51106130);教育部"春晖计划"合作科研项目(Z2014058);柴油机燃料电控系统及尾气后处理系统产业集群项目(成财教[2013]265);四川省教育厅青年基金项目(12ZB138);西华大学重点科研基金项目(Z1120319);西华大学研究生创新基金项目(ycjj2015040);四川省重点科技项目(2011JYZ014)

摘　　要：基于柴油机台架试验,在一款柴油机上加装了DOC装置,研究了DOC前后颗粒数量浓度、DOC前后颗粒SOF含量和活化能变化趋势。研究结果表明:DOC能降低核模态颗粒数量浓度和积聚态颗粒数量浓度,但随着转矩增加,DOC反而会使积聚态颗粒数量浓度增加。DOC对颗粒总数量浓度的影响随柴油机转矩的增加呈现先降低后增加的趋势。在转矩为50N·m和100N·m工况下,DOC能使颗粒SOF组分含量降低,使颗粒的表观氧化活化能升高。此外,排气颗粒的表观氧化活化能随SOF含量的增加整体上呈下降趋势。Based on diesel engine bench test, a DOC device was added on a diesel engine to analyze the particle number concentration and the variation trend of both SOF content and activation energy of particles before and after the DOC device. Results show that the DOC device can reduce the nucleation mode particle number concentration and the accumulation mode particle number concentration, but with the increase of torque, the DOC device will increase the accumulation mode particle number concentration. The effect of DOC on the total particle number concentration shows a trend of decreasing first and then increasing with the increase of torque; The DOC device can reduce the content of SOF component and increase the apparent oxidation activation energy ofparticles under the conditions of torque of 50 N· m and 100 N· m. In addition, the apparent oxidation activation energy of exhaust particles shows a decreasing trend as a whole with the increase of SOF content.

关 键 词：DOC 柴油机颗粒 颗粒数量浓度 SOF含量 表观活化能 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]