Edit – How does having multiple pistons affect the output of the engine?
In: Engineering
When gaseous fuel and air burn, they get super hot and expand. This expansion is contained within a cylinder, with a moving sealed piston head in it. The expansion forces the piston head outwards. The piston head is connected to a wheel so that the wheel gets spun. Once the piston reaches the farthest point (top dead center) the gas is released and the spinning wheel pushes the piston back down. This cleans the remaining exhaust gas out of the cylinder. Then, the spinning wheel pulls the piston back up, sucking fresh air in. Then the wheel pushes the piston back down, compressing the air. At bottom center the fuel is injected into the cylinder and ignites either due to heat from the gas being compressed or due to a spark generated by an electrical spark plug. The cycle then starts anew.
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