姬忠锐1，杨文娟2，王镇1
1.潍柴动力股份有限公司，山东潍坊261061；2.盛瑞传动股份有限公司，山东潍坊262100
摘要：针对重型商用车国六排放标准中整车实际道路粒子数量（particle number，PN）的排放限值及测量方法难以适用于日常车辆的抽检和快速摸底的问题，借鉴大数据思想，研究PN排放低于限值、处于限值边界、严重超出限值3种情况下PN的瞬态排放水平及规律，并在瞬态排放水平与国六标准限值之间建立经验公式；提出模糊边界的整车排放试验分析方法和单位归一法。经验证，本文中提出的经验公式和方法，能够快速预判整车PN排放水平，提高抽检效率，可以为设计开发满足PN排放标准的整车、柴油机颗粒补集器故障模式分析、整车非标准循环的试验研究等提供必要参考和依据。
关键词：便携式排放测试系统；PN排放；模糊边界；整车运行工况；整车排放
Abstract:Aimed at the problem that the real road PN emission limits and measurement methods for emissions from diesel fuelled heavyduty vehicles (CHINA VI) is not suitable for the daily random inspection and quick survey of vehicles, based on the statistics of a large sample of data, the transient emission levels and rules of PN are studied of three situations in which PN emissions are below the limit, at the boundary of the limit and seriously beyond the limit. Further more,an empirical formula between the transient emission levels and CHINA VI standard limits is established, the “vehicle emission test analysis method with fuzzy boundaries” and “unit normalization method” are developed.It has been verified that the conclusions and methods in this paper are not only suitable for the rapid prediction of PN emission level, improve sampling efficiency,but also provide necessary reference and basis for the future design and development of PN emission and the failure mode analysis of DPF and the test research of nonstandard cycle.
Keywords:PEMS; PN emissions; fuzzy boundary; vehicle operating conditions; vehicle emissions
|
