![internal combustion 4 stroke engine internal combustion 4 stroke engine](http://www.edu.dudley.gov.uk/roadsafety/images/pollut29.gif)
When I (to come) to his house, they (to tell) me that he (to leave) an hour before.
![internal combustion 4 stroke engine internal combustion 4 stroke engine](https://c8.alamy.com/comp/BB4DMX/an-internal-combustion-engine-goes-through-four-strokes-intake-compression-BB4DMX.jpg)
We (to help) our librarian to put the books in the right order for three days already, but we (to arrange) only half the books. It is already eleven, and he still (to write) it. He (to begin) to write his composition at three o'clock. Ring me up as soon as you (to come) home. She (to teach) at our school for twenty years now. We could not go out because it (to rain) hard since early morning. I shall be reading a newspaper when he comes.ġ. Translate new words into Kazakh and learn them: as a result The internal combustion engine is called so because fuel is burned…Ī) outside the engine b) inside the engine.Ī) the intake valve opens b) the intake valve is closed c) the intake and the exhaust valves are closed.ģ.On the compression stroke.Ī) the exhaust valve opens b) the intake valve is closed c) the intake and the exhaust valves are closed. By means of what is the reciprocating movement of the pistons converted into rotary movement of a crankshaft?ġ. What takes place on the exhaust stroke?Ħ. What takes place in the cylinder on power stroke?ĥ. Why is the engine called the internal combustion engine?Ĥ. The heat released by the fuel is transformed into work so that the reciprocating movement of the pistons is converted into rotary movement of a crankshaft by means of connecting rods.ġ - intake 2 - compression 3 - power 4 - exhaust So the piston moves in the cylinder down (intake stroke), up (compression stroke), down (power stroke), up (exhaust stroke). This is called the exhaust stroke which completes the cycle. It lets the burnt gas flow through the exhaust valve into the atmosphere. When the piston reaches the bottom of its stroke, the exhaust valve is opened, pressure is released, and the piston again rises. As a result of burning mixtures the gases expand and great pressure makes the piston move back down the cylinder. As a result of burning mixtures the both valves being closed during its combustion. As the piston again reaches the top dead center the spark plugs ignite the mixture, both valves being closed during its combustion. On reaching the lowest position (bottom dead center) the piston begins to move upward into the closed upper part on the cylinder, (he inlet valve is closed and the mixture is compressed by the rising piston. This is called the inlet (intake) stroke. When the piston moves down the inlet valve opens to intake a charge of fuel into the cylinder. To describe the complete cycle, let's assume that the piston is at the top of the stroke (top dead center) and the inlet and the exhaust valves are closed. The operating cycle of the four-stroke petrol engine includes: inlet stroke (intake valve opens), compression stroke (both valves closed), power stroke (both valves closed), exhaust stroke (exhaust valve is opened). A cycle is one complete sequence of 4 strokes of the piston in the cylinder. Most automobile engines work on a 4-stroke cycle. The internal combustion engine is called so because fuel is burned directly inside the engine itself. Principle of Operation of the Four-Stroke Petrol Engine Text “Principle of operation of the four-stroke petrol engine”.