Kun Shan University Institutional Repository:Item 987654321/6535
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 25459/26053 (98%)
造访人次 : 6690459      在线人数 : 58
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://ir.lib.ksu.edu.tw/handle/987654321/6535


    题名: 蓄熱式觸媒轉化器於機車引擎冷車起動的轉化特性研究(2/2)
    The catalyst with heat storing material on the emissions of motorcycle engine under cold-start conditions (2/2)
    作者: 洪榮芳
    关键词: 冷車起動
    觸媒轉化器
    蓄熱材料
    富氫氣體
    省油效果
    Cold start
    catalytic converter
    heat storing material
    hydrogen-rich gas
    fuel economy
    日期: 2005-07-31
    上传时间: 2009-12-30 15:49:29 (UTC+8)
    摘要: 引擎於冷起動期間,排氣管中的觸媒均處於低溫狀態,致使觸媒無法反應,造成冷起動期間引擎嚴重的污染排放。故於冷起動期間預熱觸媒,使觸媒提前達反應溫度,為改善引擎冷起動污染的有效方法之一。本計畫以蓄熱式觸媒轉化器應用於四行程機車引擎,探討蓄熱材料長度、加熱位置、加熱溫度及加熱能量等,對於觸媒轉化器於冷車起動過程轉化效果的特性。由實驗結果得知,配合較短的蓄熱材料及較高的CO 設定值,於觸媒入口處加熱者,可獲得較佳的CO 轉化效率;較長的蓄熱材料及較低的CO 設定值,無論在何處加熱,均無法獲得較佳的轉化效果。另外,由機車引擎添加富氫氣體的研究可知,在怠速期間,富氫氣體的添加量必須配合進氣氧氣的供給,若富氫氣體添加太多,致使進氣中氧氣不足,則會導致污染排放的上升。在定速行車期間,隨著富氫氣體添加量的增加,可獲得較佳的省油效果,最佳的提升率約可達33%左右。
    Both of engine and catalyst are in the low temperature condition during cold start. Severe exhaust emissions are caused by poor conversion of unburnt gases during this stage. Pre-heating the catalyst is one of the promising ways to improve the exhaust emissions of the engine during cold start. An electrically heated catalyst with heat storing material was adopted for reducing the emissions in this study. The length of heat storing material, heating position, heating temperature and heating energy on the conversion characteristics were investigated. The results showed that heating at the entrance of catalyst with the combination of shorter heat storing material and higher CO setting level, hence, better CO conversion was obtained. On the contrary, poor CO conversion was obtained with the longer heat storing material and lower CO setting level. Besides, it could be found some results from the addition of hydrogen-rich gas fueled engine tests. In the idle operation, if the hydrogen-rich gas was over-supplied, the severe exhaust emissions were obtained due to rich mixture preparation. In the cruising speed driving tests, better fuel economy could be obtained as more hydrogen-rich gas was supplied. The best improvement of fuel economy was 33%, approximately.
    显示于类别:[機械工程系所] 研究計畫

    文件中的档案:

    档案 描述 大小格式浏览次数
    932212E168001.pdf413KbAdobe PDF286检视/开启


    在KSUIR中所有的数据项都受到原著作权保护.


    本網站之所有圖文內容授權為崑山科技大學圖書資訊館所有,請勿任意轉載或擷取使用。
    ©Kun Shan University Library and Information Center
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈