Four-Stroke Petrol Engine

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This animation illustrates the processes inside a four-stroke petrol engine.

It serves as a basic introduction to four-stroke petrol engines.

Description of the Animation

1. Intake: The valves open. The piston moves downwards. The resulting partial vacuum draws air and fuel into the cylinder, where they mix to form a combustible charge.

2. Compression: The valves are closed. The piston moves upwards. This increases the pressure and temperature inside the combustion chamber.

3. Combustion: Shortly before the piston reaches the top dead centre, the fuel-air mixture is ignited by the spark plug. The fuel-air mixture burns from top to bottom. The flame front reaches the piston and drives it downward.

4. Exhaust: The fuel-air mixture is completely burnt. The valves open again. The piston moves upwards. The combustion gases are expelled.

Requirements

PlatformPC/Mac or tablet
Resolution (min)1280 x 720

Contributors

C. Hein, S. Rikowski

References

Further information

The GUI elements used in this animation are published under the MIT license:

https://github.com/sebriko/animiert

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