Here's the process of making this rotary valve engine with a different intake and an exhaust system. It wasn't easy to start ...

In this video, we explore the RevForce engine from Alpha Otto Technologies, a breakthrough in two-stroke engine design. We ...

Basic engine education is much like basic sex education: There are hundreds of well-written, informative books on the subject but only a handful of the interested people are willing to expend the time ...

Last month's "How It Works" story gave you the basics of the four-stroke cycle, describing the motion of the intake and exhaust valves in relation to the piston moving up and down in the cylinder.