Astron aerospace has shown a partial prototype of a new rotary combustion engine it claims runs at an extraordinary 60% thermal efficiency, burning totally clean with zero NOx emissions and nothing ...

A.Here's a pressure-volume diagram for a combustion engine. Although rough, it is an approximation of the so-called air-standard cycle. '' Point (a) is at atmospheric pressure, after which the air is ...

If you've got a bit of knowledge about gasoline-powered cars, you likely know that internal combustion happens when fuel and air are mixed, a spark is introduced, and the fuel burns inside the engine.

How engine design has evolved to boost fuel efficiency, and where it's going from here.