【正文】 用是向 ECU 提供汽車(chē)運(yùn)行狀況和發(fā)動(dòng)機(jī)工況等。汽車(chē)電控系統(tǒng)結(jié)構(gòu)的復(fù)雜性，使電氣線束增多、故障率增加、故障診斷難度提高，給汽車(chē)維修工作帶來(lái)了越來(lái)越多的困難，使汽車(chē)維修技術(shù)人員的技術(shù)要求也越來(lái)越高。介紹了發(fā)動(dòng)機(jī)電控系統(tǒng)的基本知識(shí)：包括診斷的一般原則、步驟和常用工具、儀器等，并列舉了伊蘭特各電控系統(tǒng)的診斷和常見(jiàn)故障案例分析。這給汽車(chē)的故障診斷與檢修帶來(lái)了困難和挑戰(zhàn)，對(duì)汽車(chē)維修人員的技術(shù)要求越來(lái)越高，對(duì)維修設(shè)備的科技含量要求越來(lái)越高，對(duì)故障診斷與檢修的方法要求也越來(lái)越高。在電子設(shè)備的故障診斷章節(jié)中介紹了汽車(chē)線路及電子設(shè)備的特點(diǎn)以及電路故障診斷與檢修要點(diǎn)。 在發(fā)動(dòng)機(jī)電控系統(tǒng)的概述中分別介紹了電控點(diǎn)火裝置（ESA） 、電子燃油噴射系統(tǒng)（EFI） 、廢氣再循環(huán)控制（EGR） 、怠速控制（ISC） 、氣門(mén)正時(shí)控制、二次空氣噴射、油氣蒸發(fā)控制等，論述了它們的組成、工作原理和作用。關(guān)鍵詞：發(fā)動(dòng)機(jī)電控系統(tǒng)組成 工作原理 故障檢修畢 業(yè) 設(shè) 計(jì) （ 論 文 ） 外 文 摘 要Title： Common fault diagnosis and analysis of automobile engine Abstract：The study of the subject is the electronic control system of engine test and fault diagnosis of automobile engine electronic control system, introduces the overview and basic knowledge of engine electronic control system fault diagnosis, engine electronic equipment fault diagnosis, engine control system maintenance and mon fault of the engine electronic control system maintenance.In the engine control system overview introduces respectively the electronic ignition device ( ESA ), electronic fuel injection system ( EFI ), exhaust gas recirculation control ( EGR ), idle speed control ( ISC ), valve timing control, the two air injection, oil gas evaporation control, discusses its position, working principle and effect. Basic knowledge in fault diagnosis in sectionIn the fifth chapter introduces the engine electronic control system maintenance, discussed the system maintenance method, steps, and the matters needing attention, and attaching the flow diagrams and tables. In the final chapter describes the electronic control system mon fault diagnosis and maintenance, lists some mon repair case, discusses the fault phenomenon, possible causes and troubleshooting methods.Modern automotive electronic control system characteristics, mainly reflected in the function of intensive, control electronics and connection standard, in the analysis of control system failure, you 2 / 50must know the electrical, electric equipment structure, function and characteristics of the electronic control system, the position, function and working principle, and a variety of mon breakdown phenomenon, reason and eliminating methods.Key words: engine electronic control system, position working principle fault maintenance目錄1 緒論 ........................................................................1 研究現(xiàn)狀 ................................................................1 研究?jī)?nèi)容 ................................................................1 研究意義 ................................................................12 汽車(chē)發(fā)動(dòng)機(jī)電控系統(tǒng)概述 ......................................................3 汽車(chē)發(fā)動(dòng)機(jī)電控系統(tǒng)的組成 ................................................3 電控點(diǎn)火系統(tǒng)（ESA） .................................................3 電子燃油噴射系統(tǒng)（EFI） .............................................4 廢氣再循環(huán)控制（EGR） ...............................................5 怠速控制（ISC） .....................................................5 燃油蒸發(fā)控制系統(tǒng)（EVAP） ............................................6 可變氣門(mén)正時(shí)和升程電子控制技術(shù)（VTEC） ..............................7 系統(tǒng)自診斷 ..........................................................8 汽車(chē)發(fā)動(dòng)機(jī)電控系統(tǒng)中的傳感器 ............................................9 溫度傳感器 ..........................................................9 壓力傳感器 ..........................................................9 節(jié)氣門(mén)位置傳感器 ...................................................10 氧傳感器 ...........................................................10 空氣流量傳感器 .....................................................11 爆震傳感器 .........................................................113 發(fā)動(dòng)機(jī)電子設(shè)備的故障診斷 ...................................................13 電路故障的診斷及檢修要點(diǎn) ...............................................13 測(cè)量點(diǎn)的選擇 .......................................................13 電路故障的檢修要點(diǎn) .................................................134 發(fā)動(dòng)機(jī)各電控系統(tǒng)的檢修 .....................................................15 發(fā)動(dòng)機(jī)燃油供給系統(tǒng)的檢修 ...............................................15 燃油系統(tǒng)的基本檢查 .................................................15 燃油系統(tǒng)油壓及噴油器的檢修 .........................................17 發(fā)動(dòng)機(jī)點(diǎn)火系統(tǒng)的檢修 ...................................................19 點(diǎn)火提前角檢查時(shí)的注意事項(xiàng) .........................................19 點(diǎn)火系的故障診斷 ...................................................19 發(fā)動(dòng)機(jī)進(jìn)排氣系統(tǒng)的檢修 .................................................21 發(fā)動(dòng)機(jī)冷卻系統(tǒng)電動(dòng)冷卻風(fēng)扇的檢修 .......................................27 電路分析 ...........................................................27 維修范例 ...........................................................272 / 50 發(fā)動(dòng)機(jī)充電、啟動(dòng)系統(tǒng)的故障檢修 .........................................27 充電、起動(dòng)電路故障檢測(cè)方法 .........................................27 充電系統(tǒng)的常見(jiàn)故障 .................................................28 起動(dòng)系統(tǒng)的常見(jiàn)故障 .................................................285 發(fā)動(dòng)機(jī)電控系統(tǒng)常見(jiàn)故障的檢修 ...............................................29 不能起動(dòng)或起動(dòng)困難故障的檢修 ...........................................29 怠速不穩(wěn)、易熄火故障的檢修 ............................................31 怠速過(guò)高 ...........................................................31 怠速過(guò)低 ...........................................................32 怠速運(yùn)轉(zhuǎn)不平穩(wěn) .....................................................34 發(fā)動(dòng)機(jī)怠速不穩(wěn)、易熄火故障診斷與排除案例 ...........................35 動(dòng)力不足、加速不良故障的檢修 .......................................35 發(fā)動(dòng)機(jī)游車(chē)故障的診斷檢修 ...............................................38 發(fā)動(dòng)機(jī)爆震故障的診斷檢修 ...............................................39結(jié)論 .........................................................................42致謝 .........................................................................43參考文獻(xiàn) .....................................................................44 1 緒論 研究現(xiàn)狀汽車(chē)作為現(xiàn)代人的代步工具已經(jīng)越來(lái)越普及，越來(lái)越成為我們生活中的一部分，隨著科技的發(fā)展呈結(jié)構(gòu)復(fù)雜化、系統(tǒng)功能多樣化、控制自動(dòng)化和智能化、顯示信息智能化發(fā)展，電子控制系統(tǒng)在汽車(chē)中占有越來(lái)越重要的地位，成為衡量現(xiàn)代汽車(chē)性能的主要標(biāo)志，同時(shí)汽車(chē)的故障也日益復(fù)雜化，由以機(jī)械故障為主