汽车实用英语电子教案10,11单元

郑州交通职业学院

教 案

2012-2013学年 第二学期

专业： 11级汽车制造与装配 课程： 汽车实用英语 教师： 陈晓静

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教材分析 1.教材基本信息

教材名称：汽车实用英语 出版社：中国传媒大学出版社 主 编：潘天堂

出版时间：2009年10月第1版

2.章节内容及学时分配

Unit 1 Automobile Hilstory

Unit 2 History of Fuel Injection System Unit 3 Benz Outlined Unit 4 Toyota Profile

Unit 5 Automobile Mass Production Process Unit 6 Automobile Engines Unit 7 The Valve System Unit 8 Cooling System Unit 9 Fuel System Unit 10 Typical EFI System Unit 11 Car Suspension Unit 12 Car Steering System Unit 13 Four-wheel Drive 3.教学手段和方法

传统教学法、多媒体课件教学法、实物演示法相结合等。

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4.教材分析

本教材题材广泛、内容丰富。大多同类教材内容过于偏重汽车机械结构，本书内容涉及汽车历史、服务等各方面，使学生通过本书的学习掌握汽车各专业方面的英文表达方式，为以后的就业和择业拓宽知识面。强调实用性和可操作性。文章内容选取难易适中，表达方式多样。既有专业文章的写作方法，也有新闻报道型的通俗写法，更有较口语化的表达方式。每单元后设有简答题，给教师的课堂教学和学生的思考留下更大空间，体现了应用型人才的培养目标和人才定位。内容突出前沿性和先进性。本书紧扣时代脉搏，介绍了现代汽车新技术的应用，为学生后续职业生涯的发展奠定基础。

5.参考教材

宋红英 主编《汽车专业英语》 北京：机械工业出版社

黄立新 主编《汽车专业英语》 西安：西安电子科技大学出版社 黄汽驰，黄新 《新编汽车专业英语》 北京：机械工业出版社 赵修强 主编《汽车专业英语》 济南：山东科学技术出版社 蔡安徽，崔永春 主编《汽车专业英语》 北京 北京理工大学出版社

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第1讲 Unit 1 Automobile History

课前分析：

1.教学内容及时间分配

New words and phrases 1学时

Development of the automobile 1学时

2.教学目的

通过对文章的翻译、学习、和讲解，掌握第一单元的汽车发展史的英文知识，

能够牢记该单元的汽车相关英语单词，并且能够拥有翻译Development of the automobile部分文章的英语基础和理解能力。

3.教学重难点

重点：Development of the automobile. 4.教学方法

本教学环节采用理论教学方法。通过举例、多媒体演示面，学生可以更直观的学习。

5.板书布置 详见教学内容 教学内容：

0.导入

通过对以往学习的汽车专业知识的回顾，引出专业英语这门课，并对这门课程进行整体分析和讲解。

1. New words and phrases

汽车 automobile 拖拉机 tractor

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铁路机车 locomotive 有轨电车 tram 无轨电车 trolley 军用车辆 military vehicle 蒸汽机 steam engine 煤气机 gas engine 汽油机 gasoline engine 国民经济 national economy 国内生产总值 (GDP) Gross Domestic Production 全拆散 (CKD) Completely Knock Down 半拆散 (SKD) Semi-Knock Down

改革开放 reform and opening 技术引进 technical import 国产化 localization 支柱产业 pillar estate 2. Development of the automobile

The engine which is called the \

an automobile. It includes the fuel, lubricating, cooling, ignition and starting systems. Generally, an automobile is operated by internal combustion engine. The internal combustion engine burns fuel within the cylinders and converts the expanding force of the combustion or \cle

3. gasoline engine

The chassis is a framework used to assemble auto components on it. The chassis itself is divided into four systems like transmission system, suspension system, steering system and brake system.

4.作业及小结：翻译The American auto industry was ill—prepared for the market shift in consumer preference from large cars to smaller ，more fuel—efficient alternatives，and for the first quarter of 1974，Detroit’s sales slipped drastically.

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第2讲 Unit 1 Automobile History

课前分析：

1.教学内容及时间分配

The post-word war2 industry 1学时

Notes 1学时 2.教学目的

通过对文章的翻译、学习、和讲解，掌握第一单元的汽车发展史的英文知识，能够牢记该单元的汽车相关英语单词，并且能够拥有翻译The post-word war2 industry部分文章的英语基础和理解能力。

3.教学重难点

重点：The post-word war2 industry. 4.教学方法

本教学环节采用理论教学方法。通过举例、多媒体演示面，学生可以更直观的学习。

5.板书布置 详见教学内容 教学内容： 0.导入

通过对以往学习的汽车专业英语知识的回顾，并对学生英语单词进行检查，通过对上次课程回顾，引入本次课程。

1.The post-word war2 industry

The transmission system applies to the components needed to transfer the drive from the

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engine to the road wheels. The main components are clutch, gearbox, drive shaft, final drive and differential.Raw Materials

2. transfer

The primary purpose of the suspension system is to increase strength and durability of components and to meet customers' requirements for riding comfort and driving safety. In automobile suspension, the major component is springs. The springs used on today's vehicles are engineered in a wide variety of types, sizes, rates and capacities. Spring types include leaf springs, coil springs and torsion bars. Springs are paired off on vehicles in various combinations, and are attached to vehicle by different mounting techniques.

3. Notes

The function of the steering system is to provide the driver with a means for controlling the direction of the vehicle as it moves. The steering system consists of steering wheel, steering shaft, worm, gear sector, pitman arm, drag link, steering knuckle arm, king pin, steering arms, tie rod, front axle and steering knuckle. They enable the car to change the direction by means of turning and moving forth and back.

The transmission system applies to the components needed to transfer the drive from the engine to the road wheels. The main components are clutch, gearbox, drive shaft, final drive and differential.

4.作业及小结

Tell us how the idea of mass production was created.

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第3讲 Unit 5 Automobile Mass Production Process

课前分析：

1.教学内容及时间分配

New words and phrases 1学时

Development of the automobile 1学时

2.教学目的

通过对文章的翻译、学习、和讲解，掌握第五单元的汽车大批量生产的英文知识，能够牢记该单元的汽车相关英语单词，并且能够拥有翻译Development of the automobile部分文章的英语基础和理解能力。

3.教学重难点

重点：Development of the automobile 4.教学方法

本教学环节采用理论教学方法。通过举例、多媒体演示面，学生可以更直观的学习。

5.板书布置 详见教学内容 教学内容： 0.导入

通过结合日常生活中的实例以及汽车的历史，引出汽车大批量的生产过程，从而引入正文，介绍汽车大批量生产的发展史。

1. New words and phrases

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first gear 一档 second gear 二档

reverse 倒车档 two-stroke engine 二冲程发动机 front wheel 前轮 rear wheel 后轮 tread 轮距 chassis 底盘

bodywork, body 车身 rear window 后窗玻璃 windscreen 挡风玻璃 (美作:windshield)

windscreen wiper风档刮水器,风档雨雪刷 (美作:windshield wiper) fender, wing, mudguard 挡泥板 radiator grille 水箱

wing mirror 后视镜 bonnet 发动机盖 (美作:hood) boot 行李箱 (美作:trunk) roof rack, luggage rack 行李架 license plate, number plate 车号 wing 前翼子板 hubcap 轮毂罩 bumper 保险杠 2. Background

In 1908 Ford began its production of the model T automobile . 3. Raw Materials 4. Design

The cylinder block of liquid-cooled engines forms the basic framework of the engine. Other parts are attached to the cylinder block or are assembled in it. The block is cast in one piece from gray iron or iron alloyed with other metals, such as nickel or chromium. Some blocks are cast from aluminum. 5.作业及小结

Tell us how the idea of mass production was created.

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第4讲 Unit 5 Automobile Mass Production Process

课前分析：

1.教学内容及时间分配 The manufacturing process

1学时

Notes 1学时

2.教学目的

通过对文章的翻译、学习、和讲解，掌握第五单元的汽车大批量生产的

英文知识，能够牢记该单元的汽车相关英语单词，并且能够拥有翻译整篇文章的英语基础和理解能力。

3.教学重难点

重点：The manufacturing process. 4.教学方法

本教学环节采用理论教学方法。通过举例、多媒体演示面，学生可以更直观的学习。

5.板书布置 详见教学内容 教学内容： 0.导入

通过对以往学习的汽车专业英语知识的回顾，并对学生英语单词进行检查，通过对上次课程回顾，引入本次课程。

1. The manufacturing process

The cylinder block of liquid-cooled engines forms the basic framework of the

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engine. Other parts are attached to the cylinder block or are assembled in it. The block is cast in one piece from gray iron or iron alloyed with other metals, such as nickel or chromium. Some blocks are cast from aluminum. The block contains not only the cylinders but also the water jackets that surround them. In aluminum blocks, cast iron or steel cylinder sleeves( also called bore liners) are used. These metals have better wearing qualities than aluminum and can better withstand the wearing effect of the pistons and rings moving up and down in the cylinders. For most engines

2. Quality control

The cylinder block of liquid-cooled engines forms the basic framework of the engine. Other parts are attached to the cylinder block or are assembled in it. The block is cast in one piece from gray iron or iron alloyed with other metals, such as nickel or chromium. Some blocks are cast from aluminum. The block contains not only the cylinders but also the water jackets that surround them. In aluminum blocks, cast iron or steel cylinder sleeves( also called bore liners) are used.

3. Notes

The electric system supplies lighting and driving power for the automobile. It cranks me engine for starting. It supplies the high-voltage surges that ignite the compressed air-fuel mixture in the combustion chambers. The electric system includes the battery, generator, starting system, ignition system, lighting system, horn system, radio and other devices.

4.作业及小结

Tell us how the development process of mass production in brife， please

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第5讲 Unit 6 Automobile Engine

课前分析：

1.教学内容及时间分配

New words and phrases 1学时 Engine types 1学时

2.教学目的

通过对文章的翻译、学习、和讲解，掌握第六单元的汽车发动机的英文知识，

能够牢记该单元的汽车相关英语单词，并且能够拥有翻译Engine types部分文章的英语基础和理解能力。

3.教学重难点 重点：Engine types. 4.教学方法

本教学环节采用理论教学方法。通过举例、多媒体演示面，学生可以更直观的学习。

5.板书布置 详见教学内容 教学内容：

0.导入

通过对以往学习的汽车专业英语知识的回顾，引出专业英语这门课，并对第六单元Engine types部分课程进行整体分析和讲解。

1. New words and phrases

steering wheel, wheel 方向盘 rear-view mirror, driving mirror 后视镜

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horn, hooter 喇叭 choke 熄火装置 gear stick, gear change 变速杆 (美作:gearshift)

gearbox 变速箱 starter, self-starter 起动器,起动钮 brake pedal 刹车踏板 clutch pedal 离合器踏板 hand brake 手制动器 foot brake 脚制动器 dashboard 仪表板 milometer 里程表 2. Engine types

The internal combustion engine, as its name indicates, burns fuel within the cylinders and converts the expanding force of the combustion into rotary force used to propel the vehicle. The actions taking place in the engine cylinder can be classified into four stages, or strokes. \refers to piston movement; a stroke occurs when the piston moves from one limiting position to the other. The upper limit of piston movement is called TDC (top dead center) .The lower limit of piston movement is called BDC (bottom dead center). A stroke is piston movement from TDC to BDC or from BDC to TDC. In other words, the piston completes a stroke each time it changes its direction of motion.

3.作业及小结：翻译

There are various types of engines such as electric motors, steam engines and internal combustion engines. But, the internal combustion engine seems to be the one most commonly used in the automotive field. According to the fuel energy used, internal combustion engines are further divided into gasoline engines, kerosene engines, diesel engines, etc.

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第6讲 Unit 6 Automobile Engine

课前分析：

1.教学内容及时间分配

How an engine works 1学时

Notes 1学时 2.教学目的

通过对文章的翻译、学习、和讲解，掌握第六单元的汽车发动机的英文知识，能够牢记该单元的汽车相关英语单词，并且能够拥有翻译How an engine works and engine baalance等部分文章的英语基础和理解能力。

3.教学重难点

重点：How an engine works 4.教学方法

本教学环节采用理论教学方法。通过举例、多媒体演示面，学生可以更直观的学习。

5.板书布置 详见教学内容 教学内容： 0.导入

通过对以往学习的汽车专业英语知识的回顾，并对学生英语单词进行检查，通过对上次课程回顾，引入本次课程。 1. How an engine works

Where the entire cycle of events in the cylinder requires four strokes (or two

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crankshaft revolutions), the engine is called a four-stroke-cycle engine. The four-stroke-cycle engine is also called the Otto cycle engine, in honor of the German engineer, Dr. Nikolaus Otto , who first applied the principle in 1876. The four piston strokes are intake, compression, power and exhaust.

Intake stroke. On the intake stroke, the intake valve has opened, the piston is moving

downward, and a mixture of air and vaporized gasoline is entering the cylinder through the valve port. The mixture of air and vaporized gasoline is delivered to the cylinder by the fuel system and carburetor.

Compression stroke. After the piston reaches BDC, or the lower limit of its travel, it begins to move upward. As this happens, the intake valve closes. The exhaust valve is also closed, so that the cylinder is sealed. As the piston moves upward (pushed now by the revolving crankshaft and connecting rod), the air-fuel mixture is compressed. By the time the piston reaches TDC, the mixture has been compressed to as little as one-tenth of its original volume, or even less. When the air-fuel mixture is compressed, not only does the pressure in the cylinder to up, but the temperature of the mixture also increases.

Power stroke. As the piston reaches TDC on the compression stroke, an electric spark is produced at the spark plug. The ignition system delivers a high-voltage surge of electricity to the spark plug to produce the spark. The spark ignites the air-fuel mixture. It now begins to bum very rapidly, and the cylinder pressure increases to as much as 3~5MPa or even more. This terrific push against the piston forces it downward,

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and a power impulse is transmitted through the connecting rod to the crankpin on the crankshaft. The crankshaft is rotated as the piston is pushed down by the pressure above it.

Exhaust stroke. As the piston reaches BDC again, the exhaust valve opens. Now, as the piston moves up on the exhaust stroke, it forces the burned gases out of the cylinder through the exhaust-valve port. Then, when the piston reaches TDC, the exhaust valve closes and the intake valve opens. Now, a fresh charge of air-fuel mixture will be drawn in to the cylinder as the piston moves down again toward BDC.

This four stroke cycle of piston within the cylinder is repeated time and again to put the vehicle forward.

2. Notes

The internal combustion engine, as its name indicates, burns fuel within the cylinders and converts the expanding force of the combustion into rotary force used to propel the vehicle. The actions taking place in the engine cylinder can be classified into four stages, or strokes. \refers to piston movement; a stroke occurs when the piston moves from one limiting position to the other. The upper limit of piston movement is called TDC (top dead center) .The lower limit of piston movement is called BDC (bottom dead center). A stroke is piston movement from TDC to BDC or from BDC to TDC. In other words, the piston completes a stroke each time it changes its direction of motion. 6.作业及小结

What dose the “DOHC 24 Valve V6”mean?

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第7讲Unit 7 The Valve System

课前分析：

1.教学内容及时间分配

New words and phrases 1学时

Valve Operation 1学时

2.教学目的

通过对文章的翻译、学习、和讲解，掌握第七单元的汽车配气机构的英文知识，能够牢记该单元的汽车相关英语单词，并且能够拥有翻译Valve Operation and Overhead camshaft valve train部分文章的英语基础和理解能力。

3.教学重难点 重点：Valve Operation 4.教学方法

本教学环节采用理论教学方法。通过举例、多媒体演示面，学生可以更直观的学习。

5.板书布置 详见教学内容 教学内容： 0.导入

通过结合日常生活中的实例以及发动机的整个构造，引出汽车配气机构的作用和用途，从而引入正文，介绍汽车配气机构。

1.New words and phrases

Cam set assembly凸轮总成 Camshaft凸轮轴

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Camshaft sensor凸轮轴位置感知器 Camshaft sprocket凸轮轴正时炼轮 Camshaft timing gear凸轮轴正时齿轮 Cap clamp set分电盘盖弹簧夹组 Carbon point碳棒 Carburetor化油器

Caster后倾 Catalytic converters触媒转换器 Centrifugal advance mechanism离心点火提前机构

Chassis底盘 Check valve止回阀 Circuit电路，油路 Clamp束环

Clearence间隙 Clearence volume余隙容积

2. Valve Operation

The valve gear of an internal combustion engine provides timely admission of the fresh charge into the cylinders and exhaust of spent gases from them. For this purpose the valves at definite moments open and close the intake and exhaust ports in the cylinder head, through which the cylinders communicate with the intake and exhaust manifold.

3. Overhead camshaft valve train 4. valve clearance

The timing gears in most engines are housed in a special case fitted at the front end of the engine. These are necessary to transmit rotation from the crankshaft to the camshaft, fuel injection pump shaft, and to oil pump and other mechanisms.The gears are made of steel and use helical teeth to reduce noise.

5.作业及小结

How does a push rod valve train work？

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第8讲 Unit 7 The Valve System

课前分析：

1.教学内容及时间分配

Cam design and control dynamic

1学时

Notes 1学时

2.教学目的

通过对文章的翻译、学习、和讲解，掌握第七单元的汽车发动机配气机

构的英文知识，能够牢记该单元的汽车相关英语单词，并且能够拥有翻译Cam design and control dynamic等部分文章的英语基础和理解能力。

3.教学重难点

重点：Cam design and control dynamic. 4.教学方法

本教学环节采用理论教学方法。通过举例、多媒体演示面，学生可以更直观的学习。

5.板书布置 详见教学内容 教学内容： 0.导入

通过对以往学习的汽车专业英语知识的回顾，并对学生英语单词进行检查，通过对上次课程回顾，引入本次课程。

1. valve timing

The tappets serve to transmit the force from the camshaft to the push rods. The

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tappets are small cylindrical bores receiving the push rods. They are made of cast iron or steel and located in the guides, which may be made integral with the cylinder block or removable as in the engine. When the engines operate, the tappets continuously rotate about their axes for uniform wear. The rotation is ensured by a convex surface of their bottoms and a slanted surface of the cams.

2. cam design and control dynamic 3. camshaft drive mechanism 3.1 belt drive 3.2 chain drive 3.3 gear drive

4.electricvalve control system 5.Notes

The push rods transmits the force from the tappets to the rocker and are made as steel stems with hardened tips or duralumin tubes with spherical steel tips press-fitted at. both ends. The push rod tips bear against the tappet hollow at one end against the spherical surface of rocker adjusting screw at other.

4.作业及小结

What is the meaning of “Valve Timing”？

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第9讲Unit 8 Cooling System

课前分析：

1.教学内容及时间分配

New words and phrases 1学时

Circulation 1学时

2.教学目的

通过对文章的翻译、学习、和讲解，掌握第八单元的汽车冷却系统的英文知识，能够牢记该单元的汽车相关英语单词，并且能够拥有翻译Circulation部分文章的英语基础和理解能力。

3.教学重难点 重点：Circulation 4.教学方法

本教学环节采用理论教学方法。通过举例、多媒体演示面，学生可以更直观的学习。

5.板书布置 详见教学内容 教学内容： 0.导入

通过结合日常生活中的实例以及发动机的整个构造，引出汽车冷却系统的作用和用途，从而引入正文，介绍汽车配气机构。

1.New words and phrases

automatic chock cover setting 自动阻风门盖调到

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automotive electric system 汽车电系 automotive engine system 引擎系统

automatic transmission 自动变速器，自动排挡变速箱 Auxiliary Brake 辅助制动器

Auxiliary Direction Indicator Lamps 辅助转向信号灯

Brake Systems for Tractors and Trailers 牵引车及挂车的制动装置 Brake tester 制动器试验台 brake valve 制动阀

brake warning lamp 制动报警灯 brake warning switch 制动报警开关 braking force control system 制动控制装置

2. Circulation

3.Then the coolant transfers heat to the airflow through the radiator.

4.Temperature control and heat transfer are based on the pressure of the system and coolant circulation.

5.Pressures are highest at the water pump outlet and in the water jackets near the combustion chambers.System pressure is lowest at the water pump inlet. Pressure is generated by the water pump and controlled by variable restrictions, like the thermostat, the heater control valve and valves in the radiator cap.

6作业及小结

What are the two types of cooling systems founded on motor vehicles

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第10讲 Unit 8 Cooling System

课前分析：

1.教学内容及时间分配 Antifreeze

1学时

Notes 1学时

2.教学目的

通过对文章的翻译、学习、和讲解，掌握第八单元的汽车冷却系统相关

的英文知识，能够牢记该单元的汽车相关英语单词，并且能够拥有翻译Antifreeze等部分文章的英语基础和理解能力。

3.教学重难点 重点：Antifreeze. 4.教学方法

本教学环节采用理论教学方法。通过举例、多媒体演示面，学生可以更直观的学习。

5.板书布置 详见教学内容 教学内容： 0.导入

通过对以往学习的汽车专业英语知识的回顾，并对学生英语单词进行检查，通过对上次课程回顾，引入本次课程。

1. Antifreeze

The purpose of the cooling system is to keep the engine at its most efficient

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operating temperature at all speeds under all driving conditions. As fuel is burned in the engine, about one-third of the heat energy in the fuel is converted into power. Another third goes out through the exhaust pipe unused, and the remaining third must be handled by the cooling system. This means that the engine can work effectively only when the heat energy is equally handled so as to keep the engine temperature in balance

There are generally two different types of cooling system: water-cooling system and air-cooling system. Water-cooling system is common. The cooling medium, or coolant, in them is either water or some low-freezing liquid, called antifreeze. A water-cooling system consists of the engine water jacket, thermostat, water pump, radiator, radiator cap, fan, fan drive belt and necessary hoses.

2.Notes

The radiator is a device designed to dissipate the heat which the coolant has absorb from the engine; it is constructed to hold a large amount of water in tubes or other passages which provide a large area in contact with the atmosphere.

The radiator usually mainly consists of the radiator core, radiator bottom tank, and radiator top tank. Radiator cores are of two basic types, the fin and tube type (fins are placed around the tube to increase the area for radiating the heat) and of the ribbon cellular or honey comb type.

3.作业及小结： 翻译：

The radiator cap serves not only to prevent the coolant from splashing out the filler

opening, but also to prevent evaporation of the coolant.

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第11讲Unit 9 Fuel System

课前分析：

1.教学内容及时间分配

New words and phrases 1学时

Gasoline 1学时

2.教学目的

通过对文章的翻译、学习、和讲解，掌握第九单元的汽车燃油供给系统的英文知识，能够牢记该单元的汽车相关英语单词，并且能够拥有翻译Gasoline部分文章的英语基础和理解能力。

3.教学重难点 重点：Gasoline 4.教学方法

本教学环节采用理论教学方法。通过举例、多媒体演示面，学生可以更直观的学习。

5.板书布置 详见教学内容 教学内容：

0.导入

通过结合日常生活中的实例以及发动机的整个构造，引出汽车燃油供给系统的作用和用途，从而引入正文，介绍汽车燃油供给系统相关知识。

1.New words and phrases

Fuel filter 汽油滤清器 Fuel metering system 燃油计量系统

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Fuel pump 汽油泵 Fuel pump gasket 汽油泵垫片 Fuel rail 汽油分供管 Fuel-system 燃油系统

Fuel supply system 燃油供给系统 Fuel tank 油箱 Fuel-tank cap 油箱盖 Electronic fan 电动风扇 Electronic ignition system 电子点火系统

2.Gasoline is a complex blend of carbon and hydrogen compounds. Additives are then added to improve performance. All gasoline is basically the same, but no two blends are identical. The two most important features of gasoline are volatility and resistance to knock (octane). Volatility is a measurement of how easily the fuel vaporizes. If the gasoline does not vaporize completely, it will not burn properly (liquid fuel will not burn)

3.Diesel fuel, like gasoline is a complex blend of carbon and hydrogen compounds. It too requires additives for maximum performance. There are two grades of diesel fuel used in automobiles today: 1-D and 2-D.

4.Tank location and design are always a compromise with available space. Most automobiles have a single tank located in the rear of the vehicle. Fuel tanks today have internal baffles to prevent the fuel from sloshing back and forth.

5 Steel lines and flexible hoses carry the fuel from the tank to the engine. When servicing or replacing the steel lines, copper or aluminum must never be used. Steel lines must be replaced with steel.

6.作业及小结

what isThe function of the fuel system？

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第12讲 Unit 9 Fuel System

课前分析：

1.教学内容及时间分配 Fuel Pump

1学时

Notes 1学时

2.教学目的

通过对文章的翻译、学习、和讲解，掌握第九单元的汽车燃油供给系统

系统相关的英文知识，能够牢记该单元的汽车相关英语单词，并且能够拥有翻译Fuel Pump等部分文章的英语基础和理解能力。

3.教学重难点 重点：Fuel Pump 4.教学方法

本教学环节采用理论教学方法。通过举例、多媒体演示面，学生可以更直观的学习。

5.板书布置 详见教学内容 教学内容： 0.导入

通过对以往学习的汽车专业英语知识的回顾，并对学生英语单词进行检查，通过对上次课程回顾，引入本次课程。

1.Engine Fuel System

The fuel system is critical to operation. The system consists of the fuel tank, lines,

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pump, filter, carburetor, and injectors . 2.Fuel Flow

The fuel in the fuel tank is ready to be used when the engine needs it. The fuel pump draw fuel from the tank and sends it to the carburetor. The carburetor is to keep the fuel at the right air-fuel ratio. For a electric fuel-injected engine, the fuel is pressurized and sent to the fuel feed pipe, through a fuel filter, and into the fuel injectors. 3.Fuel Tank

The fuel tank is used to store the fuel of engine needed. It is usually located in rear of the vehicle. The fuel tank is designed to fit around frame and to be protected from impacts. These are several baffles insides the fuel tank to restrict fuel movement during rapid starts and stops, cornering, and so on. The fuel cap on the fuel tank is used to keep the fuel from splashing out, release the vacuum created by the fuel removing, and prevent vapors from escaping directly into the atmosphere.

4.Notes

The mechanical fuel pump is used on many vehicles with carburetors and driven by the camshaft. There is a cam or an eccentric lobe on the camshaft. As the camshaft turns, the lobe lifts a lever up and down, causing a pumping action. Fuel is drawn from the tank by a vacuum and sent to the carburetor.

5.作业及小结：

翻译：Steel lines and flexible hoses carry the fuel from the tank to the engine. When servicing or replacing the steel lines, copper or aluminum must never be used. Steel lines must be replaced with steel.

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