Every new internal combustion car and truck sold in America today is equipped with a four-stroke engine, as are the vast ...

When it comes to aircraft propulsion, two common types of engines are frequently discussed: piston engines and turboprop ...

internal-combustion engine with the valves on the top. But why must that be the way of the world? Why not an opposed-piston setup? Why not radial? Why not any number of other possibilities that ...

As an additional benefit, Ferrari might be able to increase the valve surface ... skirt of each piston could help reduce friction against the cylinder walls, reducing internal friction and ...

Interference engines allow the piston to go further into the combustion chamber to increase compression, and the valves to go deeper so they open wider and for longer. Both pistons and valves ...

That means typical drawbacks of an internal combustion ... This effectively gives the pistons double duty, performing the work normally handled by valves in a typical combustion engine—which ...

An interference engine is one in which the valves and the pistons operate within the same space inside the cylinder. The timing belt or chain regulates the movement of these internal engine parts ...

Even now, as electrification seems poised to end the internal combustion engine ... rings each have three tomahawk-shaped ceramic “pistons” (shown in black) that pass through these ceramic ...

That's to say, the Wankel rotary engine design doesn't have valves — but quite a few rotary engine designs have incorporated them. Both rotary engines and piston engines utilize internal ...