Where engine power come foam ?

What powers those pistons up and down area unit thousands of small controlled explosions occurring every minute, created by combination fuel with O and igniting the mixture.

Each time the fuel ignites is named the combustion, or power, stroke.

The heat and expanding gases from this miniexplosion push the piston down in the cylinder.

Almost all of today's internal-combustion engines (to keep it straightforward, we'll target fuel powerplants here) area unit of the four-stroke selection.

Beyond the combustion stroke, that pushes the piston down from the highest of the cylinder, there area unit 3 different strokes: intake, compression, and exhaust.

Engines need air (namely oxygen) to burn fuel.

During the intake stroke, valves hospitable permit the piston to act sort of a syringe because it moves downward, drawing in close air through the engine's intake system.

When the piston reaches rock bottom of its stroke, the intake valves close, effectively sealing the cylinder for the compression stroke, which is in the opposite direction as the intake stroke.

The upward movement of the piston compresses the intake charge.

By : Abu yousef