English  |  正體中文  |  简体中文  |  Items with full text/Total items : 24928/25523 (98%)
Visitors : 5012788      Online Users : 109
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version


    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/11194


    Title: 噴射機車污染排放改善及控制系統技術提昇研發
    The exhaust emission improvement and control system modification of injection motorcycle
    Authors: 吳澤松
    洪榮芳
    張育斌
    鄒忠全
    吳向宸
    Contributor: 機械工程系
    Keywords: 相變化材料蓄熱
    節氣門積碳
    積碳抑制
    整合控制
    二次空氣系統
    Heat stored in phase change material
    deposit of intake throttle valve
    computer-controlled ignition system
    active secondary air pump
    Date: 2010-10-15
    Issue Date: 2010-10-26 15:37:45 (UTC+8)
    Abstract: 國內目前噴射機車面臨問題為長期於短程、低速狀況下行駛,觸媒溫度很難提
    升達反應狀態,除污染排放無法降低外,亦可能在觸媒表面形成沈積物,造成觸
    媒無法作用,故冷起動期間、或低速狀態下污染排放的降低,為改善引擎污染排
    放相當重要的課題;同時機車的控制系統也會影響機車之點火、噴油、空然比控
    制等,進而影響機車之污染排放。
    本計畫分為五個方向解決上述問題,包括有1.相變化材料蓄熱於機車污染改善
    之技術研發,2.節氣門積碳結構之實驗分析與整車性能驗證,3.積碳之抑制方法研
    究,4.噴射機車之噴油系統與點火系統之整合控制對污染排放之改善研究,5.噴射
    機車之主動式二次空氣系統之設計與控制。
    由計畫執行的成果可知: 1.PCM 儲熱材料,以材料比例Zn-Sn 85-15(wt%)有較
    佳的儲熱效果,當引擎熄火後,約40 分鐘左右觸媒轉化器溫度下降至200℃、90
    分鐘左右下降至100℃。使用鋅錫比例(85:15wt%)時,污染排放有較佳的改善率,
    冷置1 小時,CO 與HC 污染改善率較佳均約可達20%,而冷置2 小時,CO 與HC
    較佳污染改善率亦約可達10%。在冷置3 小時之後,因觸媒轉化器溫度達室溫,
    污染改善率已較無改善效果。PCM 儲熱式觸媒轉化器,儲熱效果約2 小時左右,
    未來可針對PCM 儲熱材料進行改善,使用具較高的相變化潛熱量且對於環境無毒
    害之材料。2. 在機車節汽門表面分別鍍上ITO、ZnO 及AZO 等三種氧化薄膜,並
    進行實車耐久2000 公里後,經由SEM 照片作觀察及分析。實驗發現ITO 薄膜可
    極有效的抑制積碳現象,ZnO 薄膜則有明顯增長積碳的現象,至於AZO 薄膜則會
    與碳結構化合成熔融狀緻密組織,這將反而不利於後續積碳之排除。3.機車的吹漏
    氣導入口改為空氣濾清器前時,可以抑制節氣門積碳,並降低廢氣污染排放,同
    時ECU 電腦裝在前端導流板後,會將低ECU 溫度至46℃。4.適當的使用較稀的
    混合氣配合點火提前角度之增加,如此可減少燃油消耗和污染排放,也可避免扭
    力降低太多而影響機車性能。 5.引擎於冷車起動後,主動式二次空氣電控模組以
    最高50L/min 二次空氣流量噴射至排氣管頭,待排氣管內之觸媒轉化器達工作溫
    度後,主動式電控模組減少其噴射量,其CO 及HC 污染排放仍有較好的淨化效果。
    在怠速1800 rpm 時有近90%冷車起動CO 及HC 總污染排放改善率,在5000 rpm
    時有60%以上冷車起動CO 及HC 總污染排放改善率,在冷車市區行車型態時有
    50%以上冷車起動CO 及HC 總污染排放改善率。
    In Taiwan, motorcycles are very important transportation tools for short distance.
    Usually the distance for motorcycles are not long enough for the catalytic converter
    heated to working temperature, the efficiency of catalyst is low and the exhaust
    emission is very high. Furthermore, the deposit may be accumulated on the surface of
    catalytic converter as the motorcycle is driven at low speed condition, and it will
    deteriorate the function of the catalyst. Hence, the improvement of the reaction feature
    of catalyst is significant. First of all, the spark ignition, fuel injection, air fuel ratio and
    exhaust emission will be effected by the control system.
    The exhaust emission improvement and control system modification of injection
    motorcycle will be studied in this project. Heat stored material will be used in exhaust
    system to reduce exhaust emission. The deposit reducing of intake throttle valve will be
    analysis and tested. Design a computer-controlled ignition system for the fuel-injection
    system of the motorcycle and to control the fuel pulse and sparking timing
    simultaneously. The improvement of the output torque, fuel consumption, and exhaust
    emission will be studied. An active secondary air pump system to supply fresh air into
    the exhaust pipe according to the engine speed after cold start will be established. The
    fresh air will help the rich exhaust emission to continue its combustion to heat the
    catalytic converter and warm up it quicker.
    The experimental results showed that: 1. The catalyst temperature lowered to about
    200oC as the engine stopped for 40 minutes, and to about 100oC for 90 minutes with the
    mixture of Zn-Sn (85-15wt%). By using this mixture, it could have 20% improvement
    in CO and HC emissions under 1 hour cold socking; 10% improvement was obtained
    under 2 hours cold socking. However, after 3 hours’ cooling, the improvement of
    exhaust emission was not obviously because of its low temperature of catalyst. As a
    whole, in this study, the heat stored in the PCM could keep the catalyst in a high
    temperature for about 2 hours. Over this time, the catalyst returned to the room
    temperature. Besides, in the future application, the PCM with higher melting heat or
    friendly to the environment will be adopted in a first priority. 2. The three oxide films of
    ITO, ZnO and AZO were selected as the experimental parameters. The surfaces of the
    coatings were took SEM observations after the motorcycle endurance test of 2000km.
    According to the experimental results, it can decrease the carbon deposition for the ITO
    film. However, it always increases the carbon deposition for the ZnO film. Moreover,
    the carbon deposition showed the melting organization for the AZO film. This indicated
    that the carbon deposition will be very difficult to overcome for the AZO film. 3. The
    induction port of blow-by gas was changed to front side of intake air cleaner. Deposit of
    intake valve and exhaust emission were reduced. When the ECU was mounted behind
    diversion plate, the working temperature was drop to 46℃. 4. Using appropriately
    leaner air-fuel-mixture with increasing decent spark advance, the fuel consumption and
    exhaust emissions can be reduced and the output torque can be kept at reasonably value
    in avoidance of influencing the drivability too much. 5. The active electron-controlled
    module injects the 50L/min secondary air into the exhaust pipe during the cold start
    condition. When the catalytic converter in the exhaust pipe reaches the working
    temperature, the active electron-controlled module reduces the amount of the secondary
    air and still can reduce the CO and HC exhaust emission significantly. There is nearly
    90% reduction of the CO and HC emission during the cold start and 1800 rpm idle
    speed condition. There is more than 60% reduction of the CO and HC emission during
    the cold start and 5000 rpm high speed condition. There is more than 50% reduction
    of the CO and HC emission during the cold start and urban driving cycle condition.
    Relation: 98 年度「環保署/國科會空污防制科研合作計畫」成果報告
    Appears in Collections:[機械工程系所] 研究計畫

    Files in This Item:

    File Description SizeFormat
    吳澤松_空污期末報告-總檔.pdf3604KbAdobe PDF9View/Open


    All items in KSUIR are protected by copyright, with all rights reserved.


    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 ©   - Feedback