颗粒捕集器炭烟加载过程试验研究

Experimental study on soot loading process of diesel particulate filter

基于整车实际工况研究了排气热管理措施对颗粒物排放的影响,以及瞬态工况对颗粒物排放的影响。创建台架加载循环,并在不同行驶工况下进行颗粒捕集器(DPF)炭烟加载试验。结果表明:排气热管理系统增加了炭烟排放,同时提高了排气温度;油门的变化速率越快,排气中测得的瞬时炭烟质量浓度越大;使用城市工况加载,DPF中炭烟沉积质量呈线性上升;使用郊区工况加载和高速工况加载,DPF中炭烟沉积质量平衡在固定点,高速工况连续再生效率最高。

Based on the actual working conditions of the vehicle,the impact of exhaust thermal management measures on particulate matter emissions and the impact of transient working conditions on particulate matter emissions were studied.Further created bench loading conditions and conducted diesel particulate filter(DPF) soot loading tests using different driving conditions.The results show that the exhaust thermal management system increases carbon smoke emissions and also increases exhaust temperature.The faster the change rate of the throttle,the greater the instantaneous concentration of soot mass measured in the exhaust.When loaded under urban conditions,the quality of soot loading in DPF shows a linear increase.Using suburban and high-speed loading conditions,the soot loading balance in DPF is at a fixed point,and the regeneration efficiency is highest under high-speed conditions.