Dual-UEGO active catalyst control for emissions reduction: design and experimental validation
Dual-UEGO active catalyst control for emissions reduction: design and experimental validation
复制标题
用于减排的双 UEGO 活性催化剂控制：设计和实验验证
DOI：
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发表时间：
2005
影响因子：
4.8
通讯作者：
Amey Y. Karnik
中科院分区：
文献类型：
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作者：
G. Fiengo;J. Grizzle;J. Cook;Amey Y. Karnik
本文研究了装有一个或两个三元催化剂和两个氧传感器的常规火花点火发动机后处理系统的主动控制。控制目标是最大化氮氧化物和未燃烧碳氢化合物的同时转化效率。线性排气氧（EGO）传感器用于测量每个催化剂上游和下游的空燃比（A/F）。采用了串联控制器结构。上游控制器基于测量的原料气A/F比提供对干扰的相对快速的响应，而下游控制器使用原料气和催化剂后A/F比测量值来补偿破坏原料气A/F比测量值的偏差。首先通过大量的仿真来评估所提出的控制系统在噪声和模型不确定性面前的性能和鲁棒性。控制策略，然后在测功机测试单元和其性能进行了实验验证与现有的专有控制器，是基于更常见的开关型A/F比传感器。
This paper investigates active control of an aftertreatment system for a conventional spark ignition engine equipped with one or two three-way catalysts and two oxygen sensors. The control objective is to maximize the simultaneous conversion efficiencies of oxides of nitrogen and unburned hydrocarbons. Linear exhaust gas oxygen (EGO) sensors are used to measure air-fuel (A/F) ratio upstream and downstream of each catalyst. A series controller configuration is adopted. The upstream controller provides relatively rapid response to disturbances on the basis of measured feedgas A/F ratio, while the downstream controller uses the feedgas and post-catalyst A/F ratio measurements to compensate for the bias corrupting the feedgas A/F ratio measurement. The performance and robustness of the proposed control system in the face of noise and model uncertainty are first evaluated through extensive simulations. The control strategy is then experimentally verified in a dynamometer test cell and its performance compared with an existing proprietary controller that is based on the more common switching-type A/F ratio sensors.