柴油机尾气后处理系统再生辅助进气的研究  

Research on Regenerative Auxiliary Fresh Air System in Diesel Aftertreatment System

作　　者：魏起森 Wei Qi-sen(Tianjin Hyundai Doosan Engine Co,.Ltd,Tianjin 300000)

机构地区：[1]天津现代斗山发动机有限公司,天津300000

出　　处：《内燃机与配件》2023年第15期25-27,共3页Internal Combustion Engine & Parts

摘　　要：装DPF的柴油机再生时常会遇到再生失败、DPF载体熔融、润滑油稀释等问题。本文通过对以上问题深入研究发现再生时提供额外的新鲜空气不仅能保障再生顺利进行,还能优化再生过程中存在的问题。再生辅助进气就是在柴油机后处理处于再生阶段时给后处理系统提供新鲜空气。该系统是根据发动机运行工况和后处理温度来决定提供额外新鲜空气的时刻和用量。满负荷或中等负荷以上,发动机本身的热负荷较大,排温也较高,再生辅助进气正常工作。小负荷或者长时间怠速时,再生不能进行,该系统就不工作。Regeneration of diesel engine with DPF often encounters many problems,such as regeneration failure,DPF carrier melting and lubricating oil dilution and so on.Through in-depth study of the problems,during the regeneration,supplying fresh air to the aftertreatment system is better for regeneration,and also optimizing the problems existing in the regeneration process.Auxiliary air system supply fresh air to aftertreatment system when engine is in regenerative state.According to the load of engine,Auxiliary air system supply different fresh air dose at different time.Under full or moderate load condition,Auxiliary air system can work normally,minimum load or low idle,Auxiliary air system cann’t work.

关 键 词：柴油机 颗粒捕集器(DPF) 再生 再生辅助进气 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]