Mazda's five-decade-long, largely futile efforts on behalf of the rotary engine demonstrate how difficult it is to unseat the conventional piston engine. Yet new concepts continue to emerge, ...

The opposed-piston engine has been around for over 100 years and is more efficient in almost every way. The engine has no traditional valves, cams, or camshafts, and no head, so it’s simpler and ...

Greencarcongress – Achates Power, the developer a two-stroke, compression-ignition (CI) opposed-piston (OP) engine, is presenting performance and emissions results of the Achates engine used in a ...

Horizontally-opposed engines are often referred to as "boxer" engines because the motion of the pistons sort of resembles a boxer, punching. Really, though, if any engine should be named for a boxer, ...

It is possible to speak about many unbelievable inventions in the field of automotive innovation; nonetheless, the hydrogen-opposed piston engine is beyond words. Developed in partnership with Achates ...

Could a full-size pickup truck ever get a fuel-economy rating of 37 mpg? California-based Achates Power believes it can, and its novel engine uses a design that dates back to the earliest days of ...

1. EcoMotors is developing high-efficiency engines — specifically the unique opoc (Opposed Piston Opposed Cylinder) engine — for use in cars, light trucks, marine applications, agricultural vehicles, ...

Groundbreaking engine technology appears fairly frequently, but few designs ever make it beyond the test bench and into production vehicles. EcoMotors International's opposed-piston engine on the ...

History makes fools of us all sometimes, none more so than when we dismiss certain ideas out of hand, only for them to come back years later and eat our words. That's why we're always intrigued by ...