Упражнение 6. Выберите правильные по смыслу ответы на вопросы. ( Все предложения надо прописывать. ответы типа 1b, 2a не подойдут )
1. Why is the engine called the internal combustion engine?
2. What stroke is called the inlet one?
3. What is a compression stroke?
4. What takes place in the cylinder on power stroke?
5. What takes place on the exhaust stroke?
6. By means of what is the reciprocating movement of the pistons converted into rotary movement of a crankshaft?
1.
It is called so because the fuel (the mixture) is burned…
a)directly inside the engine;
b)outside the engine.
2. The inlet stroke is called so because during moving down the piston…
a) the inlet valve opens to intake a charge of fuel into the cylin der;
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 power stroke
a)the spark plugs ignite the mixture, both valves are closed dur ing 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 dur ing its combustion;
b)the exhaust valve is opened and the residual gas flows through the exhaust valve into the atmosphere.
6. It is done
a)by means of pistons;
b)by means of the connecting rods.
1 The internal combustion engine is called so because fuel is burned
directly inside the engine itself
2 To describe the complete cycle, let's that the piston is
the top of the stroke (top dead center) and the and the exhaust
valves are closed, When the piston
moves down the inlet valve opens to
intake a charge of fuel into the cylinder. This is called the inlet (intake)
stroke.
3 On reaching the lowest position (bottom dead center) the pis-
der,
begins move upward the closed upper part the cylinder,
the valve is closed and the mixture is compressed by the rising
piston. This is called the compression stroke.
4 Asthe piston again
the top dead center the spark plugs ignite the mixture, hoth valves he
ing closed during its combustion. As a result of burning mixtures the
gases expand and great pressure makes the piston move back down the
cylinder. This stroke is called the
reaches
powerstroke
5 When the piston reach
the bottom of its stroke, the exhaust valve is opened, pressure is re-
lensed, and the piston again rises. It lets the burnt gas flow through the
exhaust valve into the atmosphere. This is called thexhaust stroke
which completes the cycle
6 So the piston moves in the cylinder down
(intakestroke), up (compression stroke), down (powerstroke), up (ex-
hanst stroke)
1 a
2 a
3 b
4 a
5 b
6 a
Объяснение: