The igniting spark

Air is suctioned into a cylinder in the petrol engine. Fuel is also supplied through the fuel injection. A combustible mixture arises and is then ignited by the ignition sparks.

Method of operation of the petrol engine

Step 1 - Suctioning of environmental air and fuel

1. Suction: The piston moves downwards. Environmental air and fuel are suctioned in through the intake valves.

Paso 2 - La mezcla se comprime

2. Compression: The piston moves upwards again. The mixture in the cylinder is compressed heavily. The ignition takes place in the upper "dead point" area.

Step 3 - The piston is pushed towards the crankshaft at a speed of up to 20 metres per second.

3. Operating: The combustion temperature in the combustion chamber increases to up to 2600 °C and the pressure increases to up to 120 bar. The piston is pushed towards the crankshaft at a speed of up to 20 metres per second.

Step 4 - The exhaust leaves the pistons.

4. Emission: The exhaust leaves through the exhaust valve on the next upward movement of the piston in the cylinder.

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