中职汽车专业英语(高教版 黄立新主编)教案:4.3 Igniting System

更新时间:2023-05-23 21:52:26 阅读: 评论:0

【课题】Igniting System
【教材版本】
高等教育出版社,2005版中职教材《汽车专业英语》. 黄立新主编.
【教学目标】
1.     了解汽车点火系的构造,掌握有关英语词汇词组。
2.     掌握汽车点火系相关术语的英语表达方法。
3.     能查阅与汽车点火系知识有关的英文资料。
4.     能借助字典翻译汽车点火系方面的文章。
【教学重点、难点】
教学重点:     汽车点火系的英语表达方法。
教学难点:  汽车英文缩写字母的翻译
【教学媒体及教学方法】
A. 语言功能意念训练
B. 围绕课文展开的讨论
C. 各抒己见:就课文引出的话题交流意见,表述个人观点。
D. 使用教材第2章第3课,播放收集的多媒体演示素材(以下素材样例是可播放的动画,可帮助学生对教学内容的理解,提高学习效率)。
【课时安排】
2课时(90分钟)
【教学建议】
    导入、示例、多媒体
    增加阅读和学习的趣味性,尽量做到通俗易懂。
教学中应交替使用教材、实物和动画。
【教学过程】
一、导入(5分钟)
二、新授(75分钟)
译前词语准备
center electrode
中心电极
ground electrode
旁电极
primary circuit
初级回路
condary circuit
次级回路
distributor cap
分电器盖
spark plug
火花塞
译文及评析
The purpo of the ignition system is to provide an electric spark to the correct cylinder at the correct time to ignite the air/fuel mixture. This provides energy, which is ud to force the piston down and turn the engine crankshaft. The spark consists of an electric arc produced by applying a high voltage across the electrod
es of a spark plug. This spark must occur near the end of the compression stroke, as the piston approaches top dead center (TDC). The cylinders must fire in the proper order and at a preci instant, depending on engine speed, load and temperature conditions.
点火系统的作用是在正确的时刻步伐的意思把电火花提供给气缸,点燃空气/燃油混合气。燃烧提供了能量,使活塞下行并带动曲轴。火花由电弧产生,是由经过火花塞电极的高电压形成的。火花应该在接近压缩行程终了的时候产生,即活塞位于接近上止点。各缸的点火应该有合适的顺序和精确的时间,这取决于发动机转速,负荷和温度。
评析:习惯上,中文的时间地点等状语都放在动词或句子的前面。此处,“正确的时间”,要求凸轮轴和曲轴有正确的传动比,所以,需要“正时齿轮”。
The ignition system is divided into two circuits: the primary and the condary. The primary circuit is the low-voltage side of the system and controls the condary circuit, which is the high-voltage side of the system.
The following are the basic parts of the primary ignition circuit:
点火系统分为两条回路:初级和次级初级回路是系统的低压端,并控制着次级回路,而次级回路是系统的高压端。
以下是初级回路的基本组成部分:
评析:primary意思是“初级的”,primary school “小学”。
Secondary为“次级的,第二的”,Secondary school “”中学。
前面的句子里, and一词连接了2个动词,分别是is和control,它们的主语都是the primary circuit。翻译句子应该要把句子的结构看清楚,免得张冠李戴。点火系统中的高、低压回路是利用了电工学电磁感应现象中互感原理制造而成,例如日常生活中使用的变压器也是利用这一原理制成。
薪酬绩效管理    1. Battery and/or alternator
Supplies the low voltage (12V) ud to operate the primary circuit.
    2. Ignition switch 
Key-operated switch ud to feed battery voltage to the primary circuit.
    3. Primary wires 
Low-voltage wires ud to connect the electrical components of the primary circuit.
    4. Ignition coil primary winding 
Current flow through the coil produces an electromagnetic field, which 这次不一样is ud to induce a high voltage in the condary coil.
    5.Breaker point
It is ud to open and clo the primary circuit.
1.蓄电池和发电机
提供低压电(12伏)低压电路正常工作。立定跳远的技巧
2.点火开关
通过点火开关的控制,蓄电池电压提供给初级电路。
3.初级导线
低压导线用来连接初级回路的各个部件。
4.点火线圈初级绕组
电流通过线圈,产生一个电磁场,洲际导弹的射程用来在次级线圈中产生高电压。
5.断电器触点
jdam
用来断开或接通初级电路。
评析:ud to…… 是过去分词短语,翻译为“用于十二月歌……的(装置、部件等),把……的”。
The following are the basic parts of a condary ignition circuit:
    1. Ignition coil condary winding
Has a high voltage (40000V or more) induced in it each time the primary magnetic field collaps.
    2. Coil wire
Heavily insulated wire that feeds high voltage from the ignition coil to distributor cap.
    3. Distributor rotor 
Operates in conjunction with the distributor cap to distribute the high voltage from the ignition coil to the individual spark plug wires in the firing order.
    4. Distributor cap 
Insulated cap that transfers high voltage from the distributor rotor to spark plug wires.
    5. Spark plug wire 
Heavily insulated wire that carries high voltage from the distributor to the spark plugs.
    6. Spark plug 
Provides the air gap within the combustion chamber for the high voltage to arc across, thus igniting the air/fuel mixture.
以下是次级回路的基本组成部分:
1.点火线圈次级绕组
当初级回路的电磁场每一次消失的时候,会产生一个高电压(40000伏或更高)。
2.(线圈)高压导线(中央高压线)
    导线必须确保绝缘,以保证高电压从点火线圈传输到分电器盖。
3.分电器的分火头
    作用是与分电器盖相连,把高电压从点火线圈分配到需要点火的火花塞导线上。
4.分电器盖
    该盖子是绝缘的,确保高压电从分火头传输到火花塞导线上。
5.火花塞导线(分缸高压线)
    导线必须确保绝缘,以保证高电压从分电器传输到火花塞。
6.火花塞
在燃烧室里提供空气间隙,保证高电压的电弧通过,来点燃混合气。下拉选项怎么设置
评析:在这句话中,heavily修饰insulated(绝缘的),应理解为“非常,很”,而不是“重”,在翻译时只要能表达出这层意思就可以,也不一定要完全按照字面翻译,否则,不符合阅读习惯。这句话说的是,如果高压线发生漏电现象,则高压线圈产生的高压电无法完全通过分缸线送到火花塞,从而无法产生电火花。
The distributor is the most important part in the ignition system. It handles veral jobs. Its first job is to distribute the high voltage from the coil to the correct cylinder. This is done by the cap and rotor. The coil is connected to the rotor, which spins inside the cap. The rotor spins past a ries of contacts, one contact per cylinder. As the tip of the rotor pass each contact, a high-voltage pul comes from the coil. The pul arcs across the small gap between the rotor and the contact (they don't actually touch) and then continues down the spark-plug wire to the spark plug on the appropriate cylinder. When you do a tune-up, one of the things you replace on your engine is the cap and rotor -- the eventually wear out becau of the arcing. Also, the spark-plug wires eventually wear out and lo some of their electrical insulation. This can be the cau of some very mysterious engine problems.

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