汽车专业英语电子教案 2-10

employ vt.使[采、利]用,雇用,使忙于, 使从事于
译文：消声器是用来降低发动机中排气噪 声的装置。
II. Text Explanation
A turbocharger is a device used to supercharge an engine. turbocharger [] n. 涡轮 增压器 supercharge [sjup] vt. 增压 译文：涡轮增压器是一套用来为发动机增 压的设备。
I. Pre-questions
What does the intake system consist of?
air filter, intake ducting, intake manifolds, and intake air temperature sensor. Some engines have supercharger in the intake system.
Intake and Exhaust Systems
Unit 2-10
Specialized English for Automobile
Contents
I. Pre-questions
II. Text Explanation III. Exercises
I. Pre-questions
What are the air intake and exhaust systems used to do? to clean the air coming in and reduce the noise coming out
II. Text Explanation
Catalytic converter
II. Text Explanation
Catalytic converter
II. Text Explanation
The muffler is employed to reduce the exhaust sound of the engine. muffler [mfl] n. 消声器
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III. Exercises
II. Translate the following sentences into English.
1．发动机进排气系统可以净化流入的空气，降低流出气体的 噪声。 The engine intake and exhaust systems are designed to clean the air coming in and reduce the noise coming out. 2．排气歧管用螺栓固定在发动机缸盖上。 The exhaust manifold is bolted to the cylinder head of the engine. 3．废气先经过催化器转换，再通过消声器系统排到外部环境。 It takes the exhaust gases away through the catalytic converter, then through the muffler system to the outside environment.
译文：为了使发动机正常工作，空气必须 要不受任何限制的流进或流出发动机。
II. Text Explanation
Catalytic converters are emission control devices that contain chemically treated substances that convert harmful emissions into harmless carbon dioxide and water vapor. 译文：三元催化转化器是一种排放控制装 置，它可以通过内部的化学物质将有害的 排放物转化成无害的二氧化碳和水蒸气。
I. Pre-questions
air filter
intake manifolds
intake ducting
I. Pre-questions
intake manifolds
I. Pre-questions
What does the exhaust system include?
an exhaust manifold, exhaust pipe, catalytic converters, muffler, and tailpipe.
Specialized English for Automobile
消声器
排气歧管 纸质滤芯
III. Exercises
intake manifolds
muffler
Catalytic converters
III. Exercises
The exhaust pipe is the connecting pipe between the exhaust manifold and the muffler or catalytic converter. Catalytic converters are emission control devices that contain chemically treated substances that convert harmful emissions into harmless carbon dioxide and water vapor. The catalytic converter is installed to reduce hydrocarbons (HC), carbon monoxide (CO), and nitrous oxides (NOx). The catalytic converter does this by operating at high temperature, which burns the unwanted byproducts of combustion.
II. Text Explanation
II. Text Explanation
1-compressor; 2-turbine; 3-fresh air in; 4-intake ducting; 5-piston; 6-exhaust ducting.
III. Exercises
•Translate the following expressions into Chinese. air filter intake ducting intake air temperature sensor supercharger turbocharger tailpipe compressor muffler exhaust manifold paper element 空气滤清器 进气管 进气温度传感器 增压器 涡轮增压器 排气管 压缩机
III. Exercises
I. Translate the following sentences into Chinese.
1．The straight pipe reduces exhaust back pressure, but it does not reduce the sound as much as the baffle type. 直管可减少排气的阻力，但是它减少的噪音没有带障碍板类型 的多。 2．High-velocity exhaust gases pass out of the exhaust ports and then through a turbine. 高速的废气通过排气装置，然后穿过涡轮。 3．The air filter is used on engine to trap contaminants, yet provide a free flow of air into the engine. 空气滤清器可用来阻止杂质进入，从而保障空气自由地流入发 动机中。
I. Pre-questions
I. Pre-questions
What is the purpose of the air filters?
To trap contaminants, To provide a free flow of air into the engine
I. Pre-questions
Air filter
II. Text Explanation
For an engine to operate correctly, air must flow into and out of the engine without restriction.
restriction [ristrikn] n. 限制, 约束