Stroke and 4-stroke engines

All motor vehicles have an engine. There are two types of engine. There are petrol engines and there are diesel engines. There are three engines in the diagram. There is a 2-stroke petrol engine on the left. There is a 4-stroke petrol engine in the middle and there is a 4-stroke diesel engine on the right (рис. 5).

There are spark plugs in both the petrol engines. There are spark plugs in all petrol engines. Diesel engines do not have spark plugs. They have fuel injectors. There are valves in both the 4-stroke engines. There are always valves in 4-stroke engines. There are no valves in the 2-stroke petrol engine. A 2-stroke petrol engine never has valves.

There is no oil sump in the 2-stroke engine. There is oil in the fuel. Both the 4-stroke engines have an oil sump. There is no oil in the fuel.

Задание 1. На основании информации текста заполните табл. 1.

Таблица 1

Задание 2. Пользуясь данными табл. 2 и рис. 5, опишите 2-такт-ный бензиновый двигатель, 4-тактный бензиновый двигатель, 4-тактный дизельный двигатель. Используйте при этом следующие модели:

Задание 3. Опишите 2-тактный дизельный двигатель, дополнив следующие предложения. Учтите, что данные предложения

A). There is a fuel injector in a 2-stroke diesel engine.

B). A 2-stroke diesel engine has a fuel injector.

означают одно и то же.

1. There is one valve in this engine.
This ……………………. valve.

2. There is a fuel injector on all diesel engines.

All ……………………… injector.

3. There is an oil sump in a 2-stroke diesel engine.

A ……………………….

4. This engine has one port.

There......................

Рис. 5