PVC air cannons are great, and everyone should build one of these at some point in their life, but what really makes this build exceptional is the valve. [Ben] created a piston valve for this ...

Ferrari has filed a patent for an engine with pill-shaped pistons, a radical departure from traditional circular piston ...

Ferrari has filed a patent for an engine with oval-shaped pistons. The design shortens powertrain length without losing ...

The positive crankcase ventilation valve releases exhaust gas and unburned ... unburned fuel and oil to “blow by” the pistons and collect in the crankcase where it produces sludge if not ...

Following is a transcript of the video. Narrator: Engines are made up of over 300 bolts and dozens of moving parts, like pistons and valve springs, that all work together to turn combustion into ...

Besides the fact that there are no fuel-air explosions involved, these pistons are also double-acting thanks to a valve mechanism that switches the pressurized side of the piston as it reaches the ...