主动再生微粒过滤器运行周期理论依据

I. M. Maksimov, G. V. Mavrin, A. V. Gordeev, A. Y. Pogodin
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引用次数: 0

摘要

导言(问题陈述和相关性)。柴油车辆中用于捕捉悬浮颗粒的微粒过滤器或捕集装置需要连续和/或定期再生,以保持其可操作性。柴油微粒过滤器加载和再生的顺序可以用算法的形式表示。许多科学论文对微粒过滤器在常规条件下和主动再生时的具体功能进行了研究,在开发算法时可以考虑这些论文中获得的结果。这项工作的目的是开发柴油车微粒过滤器运行周期的算法,包括过滤器加载、主动再生和故障排除的模式。本研究从科学文献中收集了有关柴油车尾气后处理系统运行(即微粒过滤器)具体特征的信息。研究假设系统中包含一个非催化式柴油微粒过滤器,以及柴油氧化催化剂、氮氧化物还原催化剂和氨氧化催化剂。颗粒物传感器、温度传感器、压力传感器、废气流量传感器和用于燃烧过滤器中积累的烟尘的燃料流量传感器被用作系统指标的测量仪器。所创建的微粒过滤器运行周期算法包括加载模式,定义了切换到主动再生的参数,定义了深度过滤和烟尘层过滤阶段之间的过渡时刻。主动再生包括两个受控燃料喷射序列,用于燃烧过滤器中的烟尘,以及在喷射之间出现温度脉冲,选择最合适的废气流速水平,并控制过滤器的温度和氧气含量。通过控制再生过程中的燃料供应,解决了处理系统的故障问题。在算法开发过程中,考虑了颗粒过滤器在主动再生过程中的特殊性,包括确保过滤器的高效除尘。该算法可用于开发对柴油车辆进行台架测试和驾驶测试的程序,也可在车辆运行期间应用于柴油发动机。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Active regeneration particulate filter operating cycle theoretical justification
Introduction (problem statement and relevance). Particulate filters or traps used in diesel vehicles to catch suspended particles require continuous and/or periodic regeneration in order to maintain operability. The order of diesel particulate filter loading and its regeneration can be presented in the form of an algorithm. Specific features of particulate filter functioning both in regular conditions and during active regeneration have been studied in a number of scientific papers, and the results obtained in them can be considered when developing the algorithm.The purpose of the work is development of the algorithm of the operating cycle of the diesel vehicle particulate filter including modes of filter loading, active regeneration and troubleshooting.Methodology and methods. Information from scientific literature regarding specific features of diesel vehicle exhaust gas aftertreatment systems operation, namely regarding particulate filters, has been collected under this study. The study assumes a noncatalytic diesel particulate filter that is contained in the system together with a diesel oxidation catalyst, nitrogen oxide reduction catalyst and ammonia oxidation catalyst. Particulate matter sensors, temperature sensors, pressure sensors, exhaust-gas flow sensors and flow sensors for fuel to burn the soot accumulated in the filter have been used as measuring instrumentation of system indicators.Results. The created algorithm of the particulate filter operating cycle included the loading mode with definition of parameters for switching to active regeneration, definition of the transition moment between the stages of deep filtration and filtration in the soot layer. Active regeneration consisted of a sequence of two controlled fuel injections for combustion of soot in the filter and occurrence of the temperature impulse between the injections with selection of the most suitable level of exhaust gas flow rate as well as the control over the filter temperature and content of oxygen. The problems of malfunctions of the treatment system were solved by controlling the fuel supply during regeneration.Scientific novelty. The peculiarities of processes in the particulate filter during active regeneration were considered in the algorithm development, including ensuring high efficiency of soot removal from the filter.Practical significance. The algorithm can be used to develop a procedure to perform bench and driving tests of diesel vehicles as well as it can be applied in a diesel engine during vehicles operation
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