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 ...

When we here in the modern age think of an “engine,” we are usually thinking of a four-stroke, four-cylinder, gasoline-fed, internal-combustion engine with the valves on the top. But why must that be ...

The footage captured shows the valves injecting fuel and air. A spark plug ignites the fuel which makes the combustion gases push the piston, to drive the crankshaft. Watch the video to see it in ...

The object of the invention herewith illustrated is to provide for steam engine governors and steam pressure regulators a simple and reliable balance valve for controlling the flow of steam.

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 ...

There could also be advantages for valve sizes (or the number of valves) fitted above each piston. Although Ferrari’s patent only specifies the engine would have at least two cylinders ...

allowing for a more compact powertrain without having to sacrifice piston surface area or displacement. As an additional benefit, Ferrari might be able to increase the valve surface area either ...

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 ...