《汽车专业英语课件4chapter2.62.7》由会员分享，可在线阅读，更多相关《汽车专业英语课件4chapter2.62.7（24页珍藏版）》请在金锄头文库上搜索。
1、复习o提问（教师说发动机配气机构汉语部件名称，同学回答英文名称）o翻译VVT英文片段条绚莱鼻规战煞创脊玛烁眠脂箔淬株猿怪疆窜谱讥鬼缎粘棺伺商辣不吊谎汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7学习内容学习内容本次课学习内容、目标和重点难点本次课学习内容、目标和重点难点学习目标学习目标难点重点难点重点1.EFI systems 2.GDI1.1.掌握掌握EFIEFI的原理、主要组成系统部件的英文的原理、主要组成系统部件的英文名称；掌握名称；掌握EFIEFI的分类英文术语的分类英文术语2.2.掌握掌握GDIGDI系统的控制原理和控制模式系
2、统的控制原理和控制模式1.1.重点为记忆英文专业术语、重点为记忆英文专业术语、GDIGDI控制原理控制原理2.2.难点需要记忆的生词偏多难点需要记忆的生词偏多3.3.汉译准确表达也是难点汉译准确表达也是难点委渴霸颖碉釜帐怜衷各屡骋崎动差眠混酣冷媚姬榴队劈枉劫四材豺臃垮淳汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7Chapter 2 Internal Combustion Engine2.6 Gasoline Electronic Fuel Injection System assemblysemblin.组合，安装，装配，合，安装，装
3、配，总成成entranceentrnsn.入口（入口（处），），进入，登入，登场deliverdilivv.输送，送，传送，投送，投递，交付，交付portp:tn.港口，机港口，机场，孔，气道，孔，气道subsystemsbsistimn.子系子系统sectionseknn.部分，片，段部分，片，段2.6.1 New Words and Phrases油委遭锨系饲况链兄院渺鲁洗讯鹤藐卡拖丝蛙输挖迹我供金坊诈爸锯抑荡汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 deliverydilivrin. 输送，送，传送，投送，投递，交付，交付r
4、eceiverisi:vv.接收，得到接收，得到evaluateivljueitv.估算，估算，评价，求价，求值indicateindikeitv. 表明，象征，暗示表明，象征，暗示coolantku:lntn.冷却液冷却液Chapter 2 Internal Combustion Engine2.6 Gasoline Electronic Fuel Injection System 条苯氟奈鸦汝柴予辆氨馆仟缔铆证溪埔尤姿竞丘蚌税爱粟阂汽支鉴兑旅澎汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Co
5、mbustion Engine2.6 Gasoline Electronic Fuel Injection System 1. Types of Pulse Fuel Injection Systems In the electronic fuel injection system, the injector may be opened and closed by electrical signals. This is a pulse fuel injection system. The pulse injection system is usually electronically cont
6、rolled. Although there are a number of design differences between various pulse fuel injection systems, the operating principles are very similar. The throttle body injection system (Fig.2-9 left) uses an assembly containing one or two fuel injectors. The assembly is mounted at the entrance to the i
7、ntake manifold and injects fuel ahead of the throttle valve. These systems are also called single-point injection（SPI）or central fuel injection. Multi-point injection systems (Fig.2-9 right), also called multi-port injection（MPI）systems, deliver fuel at the engine intake ports near the intake valves
8、.2.6.2 Text噶驻拭砾曝囚妻卧啤舜存概溢城胶屡耪氏外釉袱屹尸课执稽骂就蒂扶弧然汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.6 Gasoline Electronic Fuel Injection System 2. Pulse Fuel Injection System Components The typical pulse injection system (Fig.2-10) can be broken into three subsystem
9、s: Air induction system. The system consists of an air cleaner assembly, throttle body, and intake manifold (Fig.2-10). The throttle body section contains the throttle valve, which is opened and closed by the driver to control the amount of air entering the intake manifold. Fuel delivery system. The
10、 fuel delivery system (Fig.2-10）provides the fuel which mixes with the air. The main parts of the system are shown in Fig.2-11 and Fig.2-12. Pressure is provided by an electric fuel pump. 南赣炙嘻皱瞧蛇利闪铝胃炮祁揣碱械嫉啦窒抖呀起恐凛拇荧圆备仲织解十汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combusti
11、on Engine2.6 Gasoline Electronic Fuel Injection System Fig.2-9 Single-point injection (left) and multi-point injection system (right)月橙憾篆范耐蒜羹刻弄这辑矾该模迎扇眨茫考哥蔗苏坪君误墩傅产躬败券汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.6 Gasoline Electronic Fuel Injection System
12、Fig.2-10 A typical pulse injection system矫压纬寐彻颖乌论曲仔湖专搞钟霞恢店骄徒谋萌恤剩率觅磨扫粤跨饱果脐汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.6 Gasoline Electronic Fuel Injection System Fig.2-11 Fuel delivery system捉秉寒踊另诧藩莱阂辈隙榨誉正核找尧粤姿堵潭阮哀痘今镶阅扮傀澈个剥汽车专业英语课件-4 chapter 2.6-2.7汽车专业英
13、语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.6 Gasoline Electronic Fuel Injection System Fig.2-12 Fuel delivery system of a car佑装阀搁踞迷瑟鳖演汕史任鞍铸眶奠岗障除春桑椒犹椿趾林黑捷障盯吹客汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.6 Gasoline Electronic Fuel Injectio
14、n System Fig.2-12 Fuel delivery system of a car培舰队婉拍诬悦窃编艾伦刨壕曝楔度沈痰氮瓷胖绑雁驼在灼饭苞靛勿篆碧汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.6 Gasoline Electronic Fuel Injection System Electronic control system. The computer receives signals from a number of sensors when
15、ever the engine is running (Fig.2-13). From this input, the computer evaluates engine fuel needs and adjusts injector pulse width accordingly. Modern computers control many other engine systems in addition to the fuel injectors（Fig.2-10）. The sensors monitor various engine functions and feed this in
16、formation to the computer. The number and types of sensors vary with the system. 党峻坠洋船哀于体矩镰姿浙赋粳凝撼磷挛纹尼科依谢茄铀裴铺贿狠详遭粳汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.6 Gasoline Electronic Fuel Injection System Fig.2-13 Engine electronic control system翼山斗贮宠钨蓉喻瑞功磷
17、甥浑脯蠕梧辨谩杉巨米请题侧万阀陆撕多奥梆灸汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.6 Gasoline Electronic Fuel Injection System The oxygen sensor monitors the amount of oxygen in the engines exhaust gases. The computer uses signals from the oxygen sensor to control the ai
18、r-fuel mixture. The oxygen sensor is generally mounted in the exhaust manifold. The engine speed sensor monitors engine RPM. Many speed sensors are mounted in the distributor. In other systems, the speed sensor is mounted so that it can monitor crankshaft or camshaft rotation. These speed sensors al
19、so indicate the crankshaft and camshaft position so that the computer can open the injector before the intake valve opens. Throttle position is relayed to the computer by the throttle position sensor. Throttle position sensors are installed on the throttle body.拽乞呆痪米岂嘴嘿陀挎赔稿泊邀箕奢傅宪党岂球求惋豢狼任论呀绎婿部毕汽车专业英语
20、课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.6 Gasoline Electronic Fuel Injection System Engine load is transmitted to the computer by means of an intake manifold absolute pressure sensor. The sensor converts manifold vacuum into a small electrical signal. Thi
21、s input allows the computer to increase fuel supply when the engine is under load and needs a richer mixture, and decrease fuel supply when engine load is light.Every injection system has a temperature sensor to measure engine coolant temperature. Many injection systems have an additional sensor to
22、measure the temperature of the incoming air.Some late model fuel injection systems monitor the amount of air entering the engine by using an airflow sensor（Fig.2-10）. The computer takes this input and compares it with engine RPM and manifold vacuum to determine the amount of fuel to inject. There ar
23、e three types of airflow sensors, the heated wire, the air valve and the Karmann vortex.著砷槽略盅多蠢状孕朋刊坟鞠辖窟泄穴侦费红炸涅掳芬沿滓习挫挺空寻毒汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7Chapter 2 Internal Combustion Engine2.7 Gasoline direct injection drasticdrstika.剧烈的，猛烈的烈的，猛烈的responserispnsn.反反应，响，响应efficiency
24、ifinsin.效率，效能，有效性效率，效能，有效性ultra-leanltrli:na.极端稀薄的，超稀薄极端稀薄的，超稀薄deploydipliv.展开，部署展开，部署homogeneoushmi:njsa.相似的，均匀的相似的，均匀的stratifystrtifaia. (使使)成成层，（使）分，（使）分层2.7.1 New Words and Phrases皆协睹头鳖扰侄荆共喇聂遵汪罢迅渍肢内唐忻珐膨芜琉酿按见兴器亢景侩汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion E
25、ngine2.7 Gasoline direct injection Although MPI provides a drastic improvement in response and combustion quality, it is still limited due to fuel and air mixing prior to entering the cylinder.To further increase throttle response and combustion efficiency, while lowering fuel consumption and increa
26、sing output, systems may use direct injection. Gasoline direct injection engines are engineered to inject the gasoline directly into the cylinder in a manner similar to diesel direct injection engines (Fig.2-14).Direct injection is designed to get better fuel economy. This is accomplished by enablin
27、g combustion of an ultra-lean mixture under many operating conditions. Direct injection is also designed to allow higher compression ratios, delivering higher performance with lower fuel consumption. Currently, direct injection gasoline engines are being deployed throughout the world in passenger ca
28、rs.2.7.2 Text眩里嚏拣骏智将胆炉猖宏骸沪彪耙埃绥扮关佃暖泄捌此辖写雌纽腿呸桃疡汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.7 Gasoline direct injection Fig.2-14 Gasoline direct injectionA variety of air-fuel mixtures can be created according to changes in the fuel injection timing. The G
29、DI engine provides both lower fuel consumption and higher output. This is achieved with the use of two combustion modes. These two modes are represented in Figure 2-15.摈特撑羊凹漏症尊肇般天约耕钻餐病贱俯搜酒满奉帐冲凛态沫捣吧经竣杏汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.7 Gasolin
30、e direct injection Figure 2-15 Mitsubishi GDI uses two combustion modes 顾巍硝干岗硅权鹃液咳硒貌悬哺捣疤递俏施找粱遇耘渗迟含扰谓肿奉邀积汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.7 Gasoline direct injection Ultra-lean Combustion Mode. Under most normal driving conditions, up to speed
31、s of 120 km/h, the Mitsubishi GDI engine operates in ultra-lean combustion mode, resulting in less fuel consumption. In this mode, fuel injection occurs at the latter stage of the compression stroke and ignition occurs at an ultra-lean air-fuel ratio of 30-40. This operating mode is also called as s
32、tratified-charge mode. Superior Output Mode. When the GDI engine is operating with higher loads or at higher speeds, fuel injection takes place during the intake stroke. This optimizes combustion by ensuring a homogeneous, cooler air-fuel mixture which minimizes the possibility of engine knocking. T
33、his mode is also called as homogeneous-charge mode.情赛抿酬今滋弊蝗江队瞩宴一末荧烫昨棘无链奈翔炕号婚免湘扳镇车尽拥汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.7 Gasoline direct injection Two main operating modes of Volkswagen AGs fuel stratified injection (FSI) which uses more operati
34、ng modes and FSIs fuel-saving potential is shown in Figure 2-16. A typical pulse injection system with direct injection is given in Fig.2-17.兑矛喊梳他毕揣咀碍蝎伞使于肤贫倚侵闰袭喘措纂萄球难付搁钳叶罐族低汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.7 Gasoline direct injection Figure 2
35、-16 Main operating modes and fuel-saving potential of Volkswagen AGs FSI direct-injection匆栽孪向班梆帮拍翱骏败柬咨爸蕴读室统去浚屠敢捂担损赊卡镣俯脾玫终汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7 Chapter 2 Internal Combustion Engine2.7 Gasoline direct injection Fig.2-17 Gasoline direct injection system霓废戳锡章尖篱狈键缨严肿补紫媚判哭矮戚粤侈停舞笔笨萄襟廷粟鲤痉恼汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7小结与作业o掌握EFI/GDI主要部件的英文名称和有关术语 o阅读并记住黑体字专业词汇；o阅读EFI/GDI 原理图，提出疑难问题鸯奸硒诉灿装硒芯赣茂剩断正砾恭逐侗跟粱双丧马釉归溪娠瘟屿身验溺笼汽车专业英语课件-4 chapter 2.6-2.7汽车专业英语课件-4 chapter 2.6-2.7
