You'd think measuring an engine's displacement would be simple, but there's a long history of trying to figure out how to ...

LiquidPiston says its new XTS-210 solves the efficiency, lubrication and fuel type issues of Wankel rotary engines. This supercharged, liquid-cooled two-stroke claims 5X the power of an equivalent ...

We all know how a conventional internal combustion engine works, with a piston and a crankshaft. But that’s by no means the only way to make an engine, and one of the slightly more unusual ...

Ford once sketched a road where an engine's pistons never saw oil and engines ran hotter on purpose. In a late‑1980s patent application filed and granted in Europe, the company described an "uncooled ...

You might overlook the end gaps of piston rings in your car. They shouldn't be taken so lightly, though, as they actually play a vital role in your engine.

Dimpled pistons might sound strange, but some say they could be the future for diesel power. We've looked at the arguments for and against this wacky idea.