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畢業(yè)論文(汽車常見故障診斷與分析)(已修改)

2025-07-06 19:53 本頁面
 

【正文】 畢業(yè)設(shè)計(論文) 常州機電職業(yè)技術(shù)學(xué)院畢業(yè)設(shè)計(論文)作 者: 吞吞吐吐他 學(xué) 號: 2222222222 系 部: 汽車工程系 專 業(yè): 汽車電子技術(shù) 題 目: 汽車常見發(fā)動機故障診斷分析 指導(dǎo)者:評閱者:2022 年 4 月 畢 業(yè) 設(shè) 計 ( 論 文 ) 中 文 摘 要 本文研究的是發(fā)動機電控系統(tǒng)的檢測與故障診斷知識,介紹了汽車發(fā)動機電控系統(tǒng)的概述和發(fā)動機電控系統(tǒng)故障診斷基本知識、發(fā)動機電子設(shè)備的故障診斷、發(fā)動機電控系統(tǒng)的檢修以及發(fā)動機電控系統(tǒng)常見故障的檢修等。 在發(fā)動機電控系統(tǒng)的概述中分別介紹了電控點火裝置(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) 、氣門正時控制、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。在電子設(shè)備的故障診斷章節(jié)中介紹了汽車線路及電子設(shè)備的特點以及電路故障診斷與檢修要點。在第五章節(jié)中介紹了發(fā)動機各電控系統(tǒng)的檢修,具體論述了各系統(tǒng)檢修的方法,步驟,及注意事項等,并附加了流程圖和表格圖片。電控系統(tǒng)常見故障的診斷與檢修,列舉了一些常見的維修案例,論述了故障的現(xiàn)象、可能的原因及故障排除方法等。關(guān)鍵詞:發(fā)動機電控系統(tǒng)組成 工作原理 故障檢修畢 業(yè) 設(shè) 計 ( 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 研究內(nèi)容 ................................................................1 研究意義 ................................................................12 汽車發(fā)動機電控系統(tǒng)概述 ......................................................3 汽車發(fā)動機電控系統(tǒng)的組成 ................................................3 電控點火系統(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 可變氣門正時和升程電子控制技術(shù)(VTEC) ..............................7 系統(tǒng)自診斷 ..........................................................8 汽車發(fā)動機電控系統(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)動機電子設(shè)備的故障診斷 ...................................................13 電路故障的診斷及檢修要點 ...............................................13 測量點的選擇 .......................................................13 電路故障的檢修要點 .................................................134 發(fā)動機各電控系統(tǒng)的檢修 .....................................................15 發(fā)動機燃油供給系統(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)動機點火系統(tǒng)的檢修 ...................................................19 點火提前角檢查時的注意事項 .........................................19 點火系的故障診斷 ...................................................19 發(fā)動機進排氣系統(tǒng)的檢修 .................................................21 發(fā)動機冷卻系統(tǒng)電動冷卻風(fēng)扇的檢修 .......................................27 電路分析 ...........................................................27 維修范例 ...........................................................272 / 50 發(fā)動機充電、啟動系統(tǒng)的故障檢修 .........................................27 充電、起動電路故障檢測方法 .........................................27 充電系統(tǒng)的常見故障 .................................................28 起動系統(tǒng)的常見故障 .................................................285 發(fā)動機電控系統(tǒng)常見故障的檢修 ...............................................29 不能起動或起動困難故障的檢修 ...........................................29 怠速不穩(wěn)、易熄火故障的檢修 ............................................31 怠速過高 ...........................................................31 怠速過低 ...........................................................32 怠速運轉(zhuǎn)不平穩(wěn) .....................................................34 發(fā)動機怠速不穩(wěn)、易熄火故障診斷與排除案例 ...........................35 動力不足、加速不良故障的檢修 .......................................35 發(fā)動機游車故障的診斷檢修 ...............................................38 發(fā)動機爆震故障的診斷檢修 ...............................................39結(jié)論 .........................................................................42致謝 .........................................................................43參考文獻 ...............................
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