Analysis of the Effects of Catalytic Converter on Automotive Engines Performance Through Real-Time Simulation Models

IF 2 Q2 ENGINEERING, MECHANICAL
A. Gambarotta, V. Papetti, P. Dimopoulos Eggenschwiler
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引用次数: 4

Abstract

Today restrictions on pollutant emissions require the use of catalyst-based after-treatment systems as a standard both in SI and in Diesel engines. The application of monolith cores with a honeycomb structure is an established practice: however, to overcome drawbacks such as weak mass transfer from the bulk flow to the catalytic walls as well as poor flow homogenization, the use of ceramic foams has been recently investigated as an alternative showing better conversion efficiencies (even accepting higher flow through losses). The scope of this paper is to analyse the effects of foam substrates characteristics on engine performance. To this purpose a 0D “crank-angle” real-time mathematical model of an I.C.Engine developed by the Authors has been enhanced improving the heat exchange model of the exhaust manifold to take account of thermal transients and adding an original 0D model of the catalytic converter to describe mass flows and thermal processes. The model has been used to simulate a 1.6l turbocharged Diesel engine during a driving cycle (EUDC). Effects of honeycomb and foam substrates on fuel consumption and on variations of catalyst temperatures and pressures are compared in the paper.
利用实时仿真模型分析催化转化器对汽车发动机性能的影响
今天,对污染物排放的限制要求使用基于催化剂的后处理系统作为SI和柴油发动机的标准。蜂窝结构的整体芯的应用是一种已建立的实践:然而,为了克服诸如从体流到催化壁的弱传质以及流动均质性差等缺点,陶瓷泡沫的使用最近被研究为一种替代方案,显示出更好的转化效率(甚至接受更高的流过损失)。本文的研究范围是分析泡沫衬底特性对发动机性能的影响。为此,对作者开发的内燃机零维“曲柄角”实时数学模型进行了改进,改进了排气歧管的热交换模型以考虑热瞬态,并增加了催化转化器的原始零维模型以描述质量流和热过程。该模型已被用来模拟一个1.6升涡轮增压柴油发动机在一个驾驶循环(EUDC)。本文比较了蜂窝基材和泡沫基材对燃料消耗以及催化剂温度和压力变化的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Frontiers in Mechanical Engineering
Frontiers in Mechanical Engineering Engineering-Industrial and Manufacturing Engineering
CiteScore
4.40
自引率
0.00%
发文量
115
审稿时长
14 weeks
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