中文摘要：

基于氧化催化转化器（ DOC）＋催化型颗粒捕集器（ CDPF）系统开展了发动机台架试验,对比系统前后 的颗粒物粒径分布,获得了系统的过滤效率,同时也测量了该系统在各稳态工况下的再生效率.研究结果表明：该 系统对颗粒物的过滤效率在发动机的各个工况均能达到9 5%以上;系统前的颗粒物数量农度呈单峰分布,主要为 核模态;系统后颗粒物数量农度呈双峰分布,峰值分别在 10 nm和 150 nm左右,且 10 nm左右波峰峰值最大;再生 效率随着再生温度的升高呈上升趋势,测试系统的起燃温度在250 °C以下;再生效率均随着再生时间的增加而增 加,但在再生后期明显变缓;在较高的再生温度时,颗粒担载量增大将有利于提高再生速率.

英文摘要：

The particle size distribution before and after the diesel oxidation converter （DOC） and catalyzed diesel particle fil-ter （CDPF ） system were measured and compared to obtain the filtration efficiency of particle on a test bench, and the system regeneration efficiency was also measured under the steady conditions of different loads. The results show that the filtration ef-ficiency of particle is beyond 95% at each condition. The particle number concentration distribution before DOC＋CDPF system shows a single peak distribution with the nuclear particle mode and that after DOC＋CDPF system showed a double peak distri-bution at the size of 10 nm with a large value and 150 nm. The regeneration efficiency increases with the increase of regenera-tion temperature and regeneration time, the ignition temperature of test system is below 250 C and the regeneration becomes slow during the late phase. At a high regeneration temperature, the increase of soot loading will promote the regeneration rate.