Neljataktiline

Neljataktiline refers to a four-stroke cycle, a fundamental operating principle for many internal combustion engines. This cycle describes the sequence of events that converts fuel into mechanical energy through a series of piston movements within a cylinder. The four strokes are intake, compression, power, and exhaust.

The intake stroke begins with the piston moving downwards, creating a vacuum that draws a mixture of fuel and air into the cylinder through an open intake valve. Following this is the compression stroke, where the piston moves upwards, closing both valves and compressing the fuel-air mixture. This compression increases the mixture's temperature and pressure, preparing it for ignition.

The power stroke occurs when a spark plug ignites the compressed fuel-air mixture. The resulting explosion forces the piston downwards, generating mechanical energy that is transferred to the crankshaft. This is the stroke that produces the engine's output.

Finally, the exhaust stroke begins as the piston moves upwards again, pushing the spent combustion gases out of the cylinder through an open exhaust valve. Once the exhaust gases are expelled, the cycle repeats, ensuring continuous operation of the engine. This four-stroke design is widely used in automobiles, motorcycles, and many other applications due to its efficiency and power delivery.