Sandia National Laboratory led by Sandia researcher Peter Van Blarigan that has been testing physical components of free-piston engines which could be 50% efficient. This is about twice as good as ...

Everyone generally knows about piston and rotary engines, with many a flamewar having been waged over the pros and cons of each design. The “correct” answer is thus to combine both into a single ...

An engine being developed at Ecomotors, Allen Park, Mich., is based on an opposed-piston opposed-cylinder (OPOC) concept updated with the latest computer modeling and thermodynamic analysis Edited by ...

Free piston engines could achieve efficiencies of 50% which is almost double a regular gas combustion engine. However, new super efficient diesel engines could be even better, plus diesels would be ...

V-shaped engines like the V6 and V8 power lots of cars, but you probably never think about what, exactly, that V angle is.

A “boxer” engine is one with cylinders positioned horizontally instead of vertically — the latter configuration found in inline and V-type engines — and the pistons move in the opposite direction from ...