Урок-презентация «Лексика по теме «Четырехтактный бензиновый двигатель» преподавателя английского языка ГБОУ СПО РК «ПЛТТ» Лазаревой Т. В. Курс: 3 Отделение: «Техническая эксплуатация подъемно-транспортных, строительных, дорожных машин и оборудования» Петрозаводск 2013 г.

Цели урока: учебные- проверка степени усвоения лексики по теме «Устройство автомобиля»; - изучение лексики по теме «Четырехтактный бензиновый двигатель»; развивающие- развитие навыка работы с политехническим словарем; - развитие навыка диалогической речи; воспитательные- содействие осознанию студентов себя как специалистов в будущей профессии.

Ход урока: 1. Организационный момент урока. 2. Проверка домашнего задания- лексика по теме «Устройство автомобиля». 3. Введение, работа над лексикой по теме «Четырехтактный бензиновый двигатель». 4. Домашнее задание.

1.Answer the questions: Who is on duty today? What day is it today? What’s the date today? Who is absent today? How are you?

2.1.Translate into Russian «Parts of a car»

2.2.Complete the following sentences: Model: When you want to see the road clearly in the rain, use the windshield wipers.

2.3.Say in English «Parts of a car»

4-Stroke-Engine

3.1. Read and translate international words without dictionary: mixture cylinder cycle principle product gas compression to operate to vary method motor carburetor

3.2.Vocabulary: internal combustion engine (ICE) stroke - intake - compression - power - exhaust cylinder carburetor connecting rod crankshaft piston spark plug valve - intake - exhaust fuel mixture residual gas - двигатель внутреннего сгорания (ДВС) - такт - впуск - сжатие - рабочий ход - выпуск - цилиндр - карбюратор - шатун - коленчатый вал - поршень - свеча зажигания - клапан - впускной - выпускной - топливо - смесь - остаточный (выхлопной) газ

? 3.3.What’s that?

internal combustion engine

?

fuel

?

cylinder

?

valve

?

piston

?

spark plug

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connecting rod

?

crankshaft

?

carburetor

3.4.Translate the text «Principle of Operation of the Four-Stroke Petrol Engine» The internal combustion engine is called so because fuel is burned directly inside the engine itself. Fuel and air are mixed in the carburetor before they go into the cylinder. In the cylinder this mixture is exploded by a spark. Most automobile engines work on a 4-stroke cycle. The operating cycle of the four-stroke petrol engine includes: 1. inlet stroke (intake valve opens), 2. compression stroke (both valves closed), 3. power stroke (both valves closed), 4. exhaust stroke (exhaust valve is opened). In the first or inlet stroke the piston moves down the cylinder, sucking in a mixture of air and fuel through an inlet valve. The valve shuts and in the second or compression stroke the piston moves up, compressing the gases. At this moment a spark runs across the spark plug, exploding the mixture. The gases from the explosion are heated greatly and they push the piston down. This is the third or power stroke, in which the crankshaft revolves. In the last fourth or exhaust stroke the piston moves up, pushing the residual gases out through the exhaust valve.

4-Stroke-Cycle

3.5.Answer the questions: 1. Why is the engine called the internal combustion engine? 2. What stroke is called the intake one? 3. What is a compression stroke? 4. What takes place in the cylinder on the power stroke? 5. What takes place on the exhaust stroke?

3.6.Choose the right answer: 1. On the inlet stroke a) the intake valve opens. b) the intake valve is closed. c) the intake and the exhaust valves are closed. 2. On the compression stroke a) a) the intake valve opens. b) the intake valve is closed. c) the intake and the exhaust valves are closed. 3. On the power stroke a) the intake valve opens. b) the intake valve is closed. c) the intake and the exhaust valves are closed. 4. On the exhaust stroke a) the intake valve opens. b) the intake valve is closed. c) the intake and the exhaust valves are closed.

Check yourself: 1. -a 2. -b 3. -c 4. -a

3.7.Read the dialogue «At the auto service»: Good afternoon! Can you help me? Hello! Yes, please? The engine doesn’t start. Maybe the pistons and valves are in disorder. Let’s have a look. Well, they are in order. And what about the crankshaft or spark plugs? Don’t worry. Just a moment. My god! There is no fuel in the tank. How can you drive?! Really? Oh, I forgot to fill in the tank! I’m sorry to trouble you! No trouble at all. You are welcome!

3.8.Fill in the gaps: …………….! Can you …….. me? …….! Yes, please? The ……. doesn’t start. Maybe the ……… and ……….. are in disorder. Let’s have a ……. Well, they are ……... And what about the ……….. or …………..? Don’t …….. Just a …... My god! There is no …… in the …….. How can you ……..?! ………? Oh, I forgot to fill in the ……! I’m ……. to trouble you! No ……….. at all. You are …………..!

Fill in the gaps: …………….! Can ………………? …….! ………………? The ……. doesn’t …….. Maybe the ……… and ……….. are in ……….. …….. have a ……. Well, ……………... And ………… the ……….. or …………..? ….…….. Just a …... My god! …………… in the …….. How ….. you ……..?! ………? Oh, I forgot to …… the ……! I’m ……. to ……. you! No ……….. at ….. ………..…………..!

4. Choose the right answer: 1. The internal combustion engine is called so because the fuel and air mixture is burned a) inside the engine. b) outside the engine. 2. The intake stroke is called so because during moving down the piston a) the inlet valve opens to intake the charge of fuel into the cylinder. b) the inlet valve is closed and the mixture is compressed. 3. The compression stroke is a stroke a) when the inlet valve opens to intake a charge of fuel into the cylinder. b) when the inlet valve is closed and the mixture is compressed. 4. On the power stroke a) the spark plugs ignite the mixture, both valves are closed during its combustion. b) the exhaust valve is opened and the residual gas flows through the exhaust valve into the atmosphere. 5. On the exhaust stroke a) the spark plugs ignite the mixture, both valves are closed during its combustion. b) the exhaust valve is opened and the residual gas flows through the exhaust valve into the atmosphere.