IV. Find the information about new engine performance. While looking for information you are free to use the internet sites given below as well as any other online resources.

Make a short presentation in front of the class.

Resources recommended:

www.automobile.com

www.wikeipedia.com

www.autogazeta.com

www.klaxon-media.ru

www.autoreview.ru

www.motorcars.com

Text 23

I. Read the text about different kinds of diesel engines and their application.

Major types of diesel engines

There are three basic size groups of diesel engines based on power—namely, small, medium, and large. The small engines have power output values of less than 188 kilowatts, or 252 horsepower. This is the most commonly produced diesel-engine type. These engines are used in automobiles, light trucks, and some agricultural and construction applications, and as small stationary electrical power generators (such as those on pleasure craft) and as mechanical drives. They are typically direct-injection, in-line, four- or six-cylinder engines. Many are turbocharged with aftercoolers.

Medium engines have power capacities ranging from 188 to 750 kilowatts, or 252 to 1,006 horsepower. The majority of these engines are used in heavy-duty trucks (those of the class 6, 7, and 8 variety). They are usually direct-injection, in-line, six-cylinder turbocharged/aftercooled engines. Some V-8 and V-12 engines also belong to this size group.

Large diesel engines have power ratings in excess of 750 kilowatts. These unique engines are used for marine, locomotive, and mechanical drive applications and for electrical power generation.

In most cases, they are direct-injection, turbocharged/aftercooled systems. They may operate at as low as 500 revolutions per minute when good reliability and durability are critical.

II. Look through the text again and answer the following questions:

1. What size groups of diesel engines do you know?

2. Where are the small engines usually used?

3. What is the power capacity of the medium engines?

4. What kinds of engines do belong to the medium size group?

5. What is the application of the large diesel engines?

III. Match the words with their definitions and make up your own sentences with these words:

1. truck a) to function or cause to function;

2. revolution b) a classification according to order or grade;

3. power c) the process of introducing fuel under pressure;

4. to operate d) a motor car;

5. marine e) the act of applying to a particular purpose;

6. rating f) the dimensions, proportions, amount of smth.;

7. injection g) one complete turn in a circle;

8. size h) a large motor vehicle to carry heavy loads;

9. application i) ability or capacity to do smth.;

10. automobile j) relating to the sea;

IV. Find information about different kinds of engines and their application. While looking for information you are free to use the internet sites given below as well as any other online resources.

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Internal combustion engines	\|	Make a short presentation in front of the class.

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