CAJ | 학술논문

开发了一种以耐高温滤袋为过滤元件的柴油机排气微粒过滤器系统。采用相同的两个滤袋,一个用于过滤柴油机排气中的微粒,把微粒沉积在滤袋的外表面,另一个利用自然进气流反方向把已沉积在滤袋外表面的微粒吹掉,使微粒随进气流再回到气缸内,在燃烧室中燃烧,达到袋滤器再生的目的。通过系统中各阀门的开关保证二个滤袋在规定的时间间隔按＂过滤＂和＂再生＂模式轮换工作。所开发的系统在一台单缸柴油机上进行了验证性试验。结果表明,袋滤器能保证90%的过滤效率。在过滤时间和再生时间相等的稳定工况下,可保证袋滤器的阻力不超过允许值。当再生间隔为10 min时,维持最大过滤阻力为13.3 kPa。这表明进气过程不仅能把滤袋捕集的微粒重新吸回气缸中,而且微粒能在燃烧室中烧掉,使滤袋不需辅助手段自行再生。
개발료일충이내고온려대위과려원건적시유궤배기미립과려기계통。채용상동적량개려대,일개용우과려시유궤배기중적미립,파미립침적재려대적외표면,령일개이용자연진기류반방향파이침적재려대외표면적미립취도,사미립수진기류재회도기항내,재연소실중연소,체도대려기재생적목적。통과계통중각벌문적개관보증이개려대재규정적시간간격안＂과려＂화＂재생＂모식륜환공작。소개발적계통재일태단항시유궤상진행료험증성시험。결과표명,대려기능보증90%적과려효솔。재과려시간화재생시간상등적은정공황하,가보증대려기적조력불초과윤허치。당재생간격위10 min시,유지최대과려조력위13.3 kPa。저표명진기과정불부능파려대포집적미립중신흡회기항중,이차미립능재연소실중소도,사려대불수보조수단자행재생。
A diesel particulate filter system was developed using the heat resistant filter bag as filtering element.There are two identical bags in the system,the one is used to trap the diesel exhaust particulate matter（PM） on the outer surface of the bag,and the other is used to blow off the deposited PM on the outer surface of the bag by intake fresh air blow,making the PM burning in the cylinder to realize the regeneration of the filter.The two bags work in ＂filtering＂ mode and ＂regeneration＂ mode in turn by switch-on and switch-off of the valves in the filter system.The developed system was verified experimentally in the dynamometer test bed with a single-diesel engine.For the steady operating condition,the filtering time span equal to the regeneration time span,the exhaust back pressure did not exceed the allowable limit.At the regeneration time span 10 minute,the maximum back pressure is 13.3 kPa.This implicated that the intake process of the intake fresh air can blow off the deposited PM on the outer surface of the bag and sends PM into the cylinder,and burns the PM during the combustion process in the combustion chamber,ensure the successful regeneration of the system without any auxiliary means.