freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

dohc型汽油機(jī)vvt_機(jī)構(gòu)設(shè)計(jì)畢業(yè)論文-展示頁

2024-09-08 18:03本頁面
  

【正文】 合國家技術(shù)標(biāo)準(zhǔn)規(guī)范。 畢業(yè)設(shè)計(jì)(論文) 題 目 DOHC 型汽油機(jī) VVT 機(jī)構(gòu)設(shè)計(jì) 院 (系) 機(jī)械與動(dòng)力工程學(xué)院 專業(yè)班級(jí) 學(xué)生姓名 學(xué)號(hào) 指導(dǎo)教師 職稱 評(píng)閱教師 職稱 2020 年 6 月 6 日 注 意 事 項(xiàng) (論文)的內(nèi)容包括: 1) 封面(按教務(wù)處制定的標(biāo)準(zhǔn)封面格式制作) 2) 原創(chuàng)性聲明 3) 中文摘要( 300 字左右)、關(guān)鍵詞 4) 外文摘要、關(guān)鍵詞 5) 目次頁(附 件不統(tǒng)一編入) 6) 論文主體部分:引言(或緒論)、正文、結(jié)論 7) 參考文獻(xiàn) 8)致謝 9) 附錄(對(duì)論文支持必要時(shí)) :理工類設(shè)計(jì)(論文)正文字?jǐn)?shù)不少于 1 萬字(不包括圖紙、程序清單等),文科類論文正文字?jǐn)?shù)不少于 萬字。 :任務(wù)書、開題報(bào)告、外文譯文、譯文原文(復(fù)印件) 。圖表 整潔,布局合理,文字注釋必須使用工程字書寫,不準(zhǔn)用徒手畫 3) 畢業(yè)論文須用 A4 單面打印,論文 50 頁以上的雙面打印 4) 圖表應(yīng)繪制于無格子的頁面上 5) 軟件工程類課題應(yīng)有程序清單,并提供電子文檔 1) 設(shè)計(jì)(論文) 2) 附件:按照任務(wù)書、開題報(bào)告、外文譯文、譯文原文(復(fù)印件)次序裝訂 3) 其它 學(xué)生畢業(yè)設(shè)計(jì)(論文)原創(chuàng)性聲明 本人以信譽(yù)聲明:所呈交的畢業(yè)設(shè)計(jì)(論文)是在導(dǎo)師的指導(dǎo)下進(jìn)行的設(shè)計(jì)(研究)工作及取得的成果,設(shè)計(jì)(論文)中引用他(她)人的文獻(xiàn)、數(shù)據(jù)、圖件、資料均已明確標(biāo)注出 ,論文中的結(jié)論和結(jié)果為本人獨(dú)立完成,不包含他人成果及為獲得重慶科技學(xué)院或其它教育機(jī)構(gòu)的學(xué)位或證書而使用其材料。 畢業(yè)設(shè)計(jì)(論文)作者(簽字): 年 月 日 重慶科技學(xué)院本科生畢業(yè)設(shè)計(jì) 摘要 I 摘 要 隨著科學(xué)技術(shù)和經(jīng)濟(jì)的發(fā)展,人類基于環(huán)境保護(hù)和人類可持續(xù)發(fā)展的要求,低能耗、低污染和動(dòng)力性已成為 汽油發(fā)動(dòng)機(jī)的發(fā)展方向。 本文在綜合探討和了解國內(nèi)、外發(fā)動(dòng)機(jī)可變配氣相位技術(shù)發(fā)展基礎(chǔ)上,具體介紹可變配氣相位 (VVT)技術(shù)在 四沖程四氣門 摩托車發(fā)動(dòng)機(jī)上的應(yīng)用以及使用的優(yōu)點(diǎn)。同時(shí)針對(duì)雙頂置凸輪軸型( DOHC)摩托車發(fā)動(dòng)機(jī)設(shè)計(jì)了一種適用的 可變配氣相位 機(jī)構(gòu) ,該機(jī)構(gòu)主要由雙進(jìn)氣氣門、雙進(jìn)氣凸輪、雙進(jìn)氣挺柱及正時(shí)切換機(jī)構(gòu)組成,可以使雙進(jìn)氣凸輪和雙進(jìn)氣挺柱根據(jù)不同運(yùn)行工況由正時(shí)切換機(jī)構(gòu)進(jìn)行切換。在 高速高負(fù)荷工況下,采用高速凸輪型線工作,可延長了氣門開啟時(shí)間,可增大氣門升程,使更多新鮮空氣進(jìn)入氣缸中,可達(dá)到增大發(fā)動(dòng)機(jī)的輸出功率的目的。 關(guān)鍵詞: 發(fā)動(dòng)機(jī) VVT 機(jī)構(gòu) 低能耗 低污染 動(dòng)力性 重慶科技學(xué)院本科生畢業(yè)設(shè)計(jì) ABSTRACT II ABSTRACT With the development of science and technology and economy, human based on the requirement of environment protection and sustainable development of human, low energy consumption, low pollution and power performance has bee the development direction of gasoline engine. Variable distribution phase technology has bee one of new technology development direction. Based on the prehensive discussion and understanding of engine variable distribution phase technology development at home and abroad, based on the introduced variable with gas phase (VVT) technology in the application of four stroke motorcycle engine of four valves and the advantages of using. Due to the development of the motorcycle in our country and our country the influence of many factors such as roads, motorcycle engine operating under many conditions transform is more, the study of motorcycle engine, the basic principle of variable distribution phase control mode and the working principle of the actuator to discuss using the variable distribution phase technology before and after impact on engine performance are very necessary. At the same time for double overhead camshaft (DOHC) motorcycle engine designs an applicable variable with gas phase mechanism, which is mainly posed of double inlet valve, double inlet CAM, double inlet lifter and timing of switching mechanism, can make double inlet CAM and double inlet lifter according to different operating conditions by the timing to switch switching mechanism. The design of variable distribution phase (VVT) mechanism, in the low speed under low load condition, the CAM contour line speed work, can shorten the valve open time, can reduce the valve lift, can decrease into the fresh air in the cylinder, may achieve the purpose of reducing engine fuel consumption, can increase the torque. Under high load conditions, the use of CAM contour line high speed work, can prolong the valve open time, can increase the valve lift, make more fresh air into the cylinder, can achieve the purpose of increase engine power output. Its main design content includes the valve group (valve, valve guide, valve seat and valve springs and other parts) in the design and valve train group (camshaft, sprocket, lifter, etc.) design. Keywords: engine。 low energy consumption。 power performance 重慶科技學(xué)院本科生畢業(yè)設(shè)計(jì) 目錄 III 目錄 摘 要 ............................................................... I ABSTRACT........................................................
點(diǎn)擊復(fù)制文檔內(nèi)容
研究報(bào)告相關(guān)推薦
文庫吧 www.dybbs8.com
備案圖鄂ICP備17016276號(hào)-1