【正文】 姓 名 學(xué) 號(hào) 所 屬 系 專業(yè)年級(jí) 指導(dǎo)教師 2021年 5 月 民用汽車正時(shí)點(diǎn)火系統(tǒng)設(shè)計(jì) 摘 要 汽車工業(yè)的不斷發(fā)展，汽車電子化程度也不斷提高 ,汽車在行駛中出現(xiàn)的發(fā)動(dòng)機(jī)工作不良，汽車點(diǎn)火系統(tǒng)的故障占了好大的比例。那么具有相當(dāng)可靠，節(jié)油，污染小，質(zhì)量可佳，性能高的點(diǎn)火系統(tǒng)，就成為很多設(shè)計(jì)者和科學(xué)家所希望收貨的結(jié)果。 關(guān)鍵詞： 汽車發(fā)動(dòng)機(jī) ；點(diǎn)火系統(tǒng)；正時(shí) 民用汽車正時(shí)點(diǎn)火系統(tǒng)設(shè)計(jì) ABSTRACT The continuous development of automobile industry, automobile electronic degree enhances unceasingly, and is an important part of the gasoline engine ignition system, the performance of the ignition system is good or not for engine power, fuel consumption and exhaust pollution, etc. In a moving car engine working poor, the ignition system fault account for a great proportion. Therefore, the ignition system with excellent performance, reliable operation, has been the vast number of car design, manufacture and users are striving for. Electronic ignition system, making the ignition system to further improve the ignition performance, reliability, to reduce the fuel consumption and emission of engine, to improve the engine performance, reliability, economy and work has played a large role, especially the electronic ignition system USES the microputer control of electronic ignition system of its maintenance difficulty also increases accordingly, so for the timing of the ignition system has a great necessity. Key words: car engine。 timing 民用汽車正時(shí)點(diǎn)火系統(tǒng)設(shè)計(jì) 目 錄 第一章 汽車點(diǎn)火系統(tǒng) ..........................................................................................1 基本作用 .........................................................................................................1 組成 .................................................................................................................1 點(diǎn)火開(kāi)關(guān) .....................................................................................................2 點(diǎn)火線圈 (升壓變壓器 )工作原理 .............................................................3 分壓器 .........................................................................................................3 點(diǎn)火提前調(diào)節(jié)裝置 .....................................................................................3 火花塞 .........................................................................................................3 電源 .............................................................................................................4 第二章 點(diǎn)火系統(tǒng)工作原理及設(shè)計(jì) .......................................................................5 霍爾式曲軸位置傳感器和凸輪軸位置傳感器（ Ne 和 G） .........................6 曲軸位置傳感器 (Ne 信號(hào) ).........................................................................6 凸輪軸位置傳感器 (G 信號(hào) ).......................................................................7 ECU 作用及原理 ..............................................................................................8 ECU 在控制中的作用 ..................................................................................8 ECU 控制點(diǎn)火原理 ....................................................................................9 第三章 點(diǎn)火正時(shí)設(shè)計(jì) ..........................................................................................10 霍爾式傳感器選擇 ........................................................................................11 霍爾元件 ....................................................................................................11 霍爾傳感器 ................................................................................................11 霍兒式感應(yīng)器工作原理 .............................................................................13 基于霍爾傳感器測(cè)發(fā)動(dòng)機(jī)轉(zhuǎn)速原理 .............................................................13 影響點(diǎn)火提前角因素 .....................................................................................14 發(fā)動(dòng)機(jī)轉(zhuǎn)的速度 .........................................................................................15 發(fā)動(dòng)機(jī)負(fù)荷 ................................................................................................16 最佳提前角的控制 ........................................................................................16 開(kāi)始點(diǎn)火提前角的控制 .............................................................................16 基本點(diǎn)火提前角的控制 .............................................................................16 修正點(diǎn)火提前角的控制 .............................................................................16 提前點(diǎn)火角得計(jì)算和判斷 .............................................................................19 最佳提前點(diǎn)火角計(jì)算 ................................................................................19 氣缸燃燒準(zhǔn)時(shí)的判斷 ................................................................................19 第四章 點(diǎn)火提前角的調(diào)整 ...................................................................................20 民用汽車正時(shí)點(diǎn)火系統(tǒng)設(shè)計(jì) 點(diǎn)火預(yù)提前角調(diào)整 .........................................................................................21 在發(fā)動(dòng)機(jī)生產(chǎn)和使用中點(diǎn)火預(yù)提前角的調(diào)整方法 .................................21 點(diǎn)火預(yù)提前角精度分析 .............................................................................21 防爆震措施 .....................................................................................................21 總計(jì) .........................................................................................................................22 參考文獻(xiàn) .................................................................................................................23 致謝 .........................................................................................................................24 民用汽車正時(shí)點(diǎn)火系統(tǒng)設(shè)計(jì) 引 言 當(dāng)今社會(huì)人們對(duì)汽車使用的要求不斷增高尤其計(jì)算機(jī)技術(shù)及控制理論的發(fā)展 ,汽車電子化程度越來(lái)越高。第二階段 ,從二十世紀(jì)七十年代末期到九十年代中期 ,在汽車設(shè)計(jì)和生產(chǎn)中形成機(jī)電一體化的思想和與術(shù) 。 點(diǎn)火系統(tǒng)是汽油發(fā)動(dòng)機(jī)重要的組成部分 ,對(duì)發(fā)動(dòng)機(jī)的性能有著重大性的影響。但是電子點(diǎn)火系統(tǒng)仍沒(méi)有擺脫真空式和離心式點(diǎn)火提前