基于燃烧器实现GPF快速灰分累积的方法研究

Research on the Method of GPF Ash Rapid Accumulation Based on Burner

在国六排放标准中,加严了颗粒物数量(PN)排放的限值,汽油机颗粒捕集器(GPF)能有效降低PN的排放。快速老化方法可有效评价GPF在全生命使用周期内的性能。本文探索了一种基于燃烧器的能够模拟实际工况的加速GPF灰分累积方法,确定了控制GPF前温度为600℃、空燃比λ为1.2的灰分累积工况,避免了GPF不出现较快的碳烟累积和频繁再生。研究了不同排气流量和灰分累积量工况下的GPF压降测试。

In the CHN VI emission standard,the emission limit of particle number(PN)is increased,and the gasoline particle filter(GPF)of gasoline engine can effectively reduce the PN.The rapid aging method can effectively evaluate the performance of GPF in its whole life cycle.In this paper,a method of GPF rapid ash accumulation based on burner is explored,which can simulate the actual working condition.The ash accumulation working condition under which the temperature before GPF was 600℃and the air-fuel ratioλwas 1.2 was determined,so as to avoid the rapid soot accumulation and frequent regeneration of GPF.GPF pressure drop test under different exhaust flow and ash accumulation conditions was studied.