PROFESSIONAL ENGLISH UNIT 6 ENGINE ELECTRICAL SYSTEMS TEXTA Starting, Charging and Ignition Systems
UNIT 6 ENGINE ELECTRICAL SYSTEMS TEXT A Starting, Charging and Ignition Systems PROFESSIONAL ENGLISH
本次课学习内容 UNIT 5 ENGINE ELECTRICAL SYSTEMS TEXTA Starting, Charging and Ignition Systems ● Charging system Starter System ● Ignition Systen
UNIT 5 ENGINE ELECTRICAL SYSTEMS TEXT A Starting, Charging and Ignition Systems • Charging System • Starter System • Ignition System 本次课学习内容
本次课学习目标 ●掌握发动机电气系统的组成 ●掌握点火系统的型式及原理 ●掌握有关的专业名词与术语 了解翻译技巧—增词
本次课学习目标 ⚫ 掌握发动机电气系统的组成 ⚫ 掌握点火系统的型式及原理 ⚫ 掌握有关的专业名词与术语 ⚫ 了解翻译技巧—增词
NEW WORDS electromagnetic[ ilektroumaeg'netik]a电磁的 trio["tri:ou]n,三件一套,三个一组,三重唱 forward- biased['f:wad" barest]正向偏压的 reverse- biased[ri'v:s" blast]反向偏压[偏置]的 capacitor[k' paesita]n= capacitator电容器 thermistor[e:mist]n热敏电阻 rope[roup]n绳,索,绳索;v围起 armature[ a:matua]n电枢 collaps[ ka'laeps]v&n倒塌,塌陷,消失,减弱 high- tension[hai- ten fan]a高(电)压的 reductor[ri"Akta]n磁阻轮
NEW WORDS electromagnetic [ilektroumæ g'netik] a.电磁的 trio['tri:ou]n.三件一套，三个一组，三重唱 forward-biased ['fɔ:wəd-'baiəst] 正向偏压的 reverse-biased [ri'və:s-'baiəst] 反向偏压[偏置]的 capacitor [kə'pæsitə] n.= capacitator 电容器 thermistor [ə:'mistə] n.热敏电阻 rope [roup] n.绳, 索, 绳索；v.围起 armature ['ɑ:mətjuə] n.电枢 collaps [kə'læ ps] v.&n.倒塌，塌陷，消失，减弱 high-tension ['hai-'ten∫ən] a.高（电）压的 reluctor [ri'lʌktə] n.磁阻轮
centrifugal[ sen trifjug]n离心的 advent[ advent]n出现,到来,来临
centrifugal [sen'trifjugəl] n.离心的 advent ['ædvənt] n.出现，到来，来临
PHRASES AND EXPRESSIONS charging system充电系统 keep up with跟上,不落后于 magnetic field磁场 field strength磁场强度 contact points触点 power transistor功率晶体管 integrated circuit集成电路 solid state固态 diode trio二极管三件组合 starting motor起动机
charging system 充电系统 keep up with 跟上，不落后于 magnetic field 磁场 field strength 磁场强度 contact points 触点 power transistor 功率晶体管 integrated circuit 集成电路 solid state 固态 diode trio 二极管三件组合 starting motor 起动机 PHRASES AND EXPRESSIONS
transmission housing变速器壳 responsible for(应)对,负责,是造成…的(主要)原 因,决定着,导致 with the advent of随着,的出现(到来) in time with与,,合拍(同期) in( constant) contact with(始终)与,保持接触 pickup coil传感线圈 electric eye电眼,光电池 shutter wheel遮光轮 initial timing初始点火正时 vacuum advance真空式点火提前角调节装置 distributorless ignition system无分电器点火系统
transmission housing 变速器壳 responsible for（应）对…负责，是造成…的（主要）原 因，决定着，导致 with the advent of 随着…的出现（到来） in time with 与…合拍（同期） in（constant）contact with（始终） 与…保持接触 pickup coil 传感线圈 electric eye 电眼，光电池 shutter wheel 遮光轮 initial timing 初始点火正时 vacuum advance 真空式点火提前角调节装置 distributorless ignition system 无分电器点火系统
Starting, Charging and Ignition Systems Charging System The charging system uses the rotation of the engine to create electricity. The electricity recharges the battery and provides power to operate the various vehicle electrical systems. The modern charging system consists of the alternator and requlator Alternator The alternator is a belt-driven electromagnetic device. After the engine is started, the alternator produces electricity to meet the needs of the vehicle and to keep the battery charged The modern vehicle contains many circuits that place a heavy load on the electrical system. Since many vehicles are used in stop-and-go city driving, this makes it difficult to maintain the battery in a fully charged state. Therefore, the alternator must be extremely efficient at all speeds
Starting, Charging and Ignition Systems Charging System The charging system uses the rotation of the engine to create electricity. The electricity recharges the battery and provides power to operate the various vehicle electrical systems. The modern charging system consists of the alternator and regulator. Alternator The alternator is a belt-driven, electromagnetic device. After the engine is started, the alternator produces electricity to meet the needs of the vehicle and to keep the battery charged. The modern vehicle contains many circuits that place a heavy load on the electrical system. Since many vehicles are used in stop-and-go city driving, this makes it difficult to maintain the battery in a fully charged state. Therefore, the alternator must be extremely efficient at all speeds
At idle, when the rotor is turning relatively slowly, the alternator can keep up with the demands of the vehicle electrical system. At normal vehicle speeds, the alternator can produce much more voltage and current than needed. To protect the alternator and the rest of the electrical system from damage, a means of reducing the output must be found Voltage Regulator To reduce alternator output, a voltage regulator is used The voltage regulator controls the alternator output by adjusting the amount of current reaching the rotor. This controls the strength of the magnetic field passing through the stator windings. The regulator controls the field strength by reading voltage output from the alternator. If output voltage becomes too high, the regulator reduces field strength. If the output voltage drops, the regulator increases field strength
At idle, when the rotor is turning relatively slowly, the alternator can keep up with the demands of the vehicle electrical system. At normal vehicle speeds, the alternator can produce much more voltage and current than needed. To protect the alternator and the rest of the electrical system from damage, a means of reducing the output must be found. Voltage Regulator To reduce alternator output, a voltage regulator is used. The voltage regulator controls the alternator output by adjusting the amount of current reaching the rotor. This controls the strength of the magnetic field passing through the stator windings. The regulator controls the field strength by reading voltage output from the alternator. If output voltage becomes too high, the regulator reduces field strength. If the output voltage drops, the regulator increases field strength
Electromechanical Voltage Regulator Older voltage regulators use contact points that are operated by electromagnetic coils. These were called electromechanical voltage requlators Electronic Voltage Regulator(EVR) All vehicles made within the last 15 years use an electronic voltage regulator. The electronic voltage regulator uses power transistors, integrated circuits, diodes, and other solid state parts to control alternator output. the electronic voltage regulator eliminates contact points and moving parts that can stick, oxidize, or wear. Some electronic regulators are remotely mounted. However, electronic voltage regulators are reliable, durable, and small enough to be incorporated into the alternator itself
Electromechanical Voltage Regulator Older voltage regulators use contact points that are operated by electromagnetic coils. These were called electromechanical voltage regulators. Electronic Voltage Regulator(EVR) All vehicles made within the last 15 years use an electronic voltage regulator. The electronic voltage regulator uses power transistors, integrated circuits, diodes, and other solid state parts to control alternator output. The electronic voltage regulator eliminates contact points and moving parts that can stick, oxidize, or wear. Some electronic regulators are remotely mounted. However, electronic voltage regulators are reliable, durable, and small enough to be incorporated into the alternator itself