One year ago at the Detroit auto show, a company called Achates Power unveiled models of a new kind of internal-combustion engine. With opposed pistons in the middle and crankshafts at either end, it ...

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 ...

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 ...

That fresh air is squeezed into a small pocket in the center of the cylinder as both pistons come together, where finally diesel fuel is directly injected, igniting the mixture and creating the power ...

Earlier this year, we wrote about the OPOC engine from EcoMotors. Since then, we've discovered another opposed-piston engine, from Achates Power in San Diego. The EcoMotors engine is a module ...

Security’s tight at Achates Power Inc. in San Diego, where you don’t just walk into the light-industrial building and expect a tour of the labs — something common where R&D is under way. Before ...

This story appears in the March 14 print edition of Transport Topics. Truck and engine maker Navistar Inc. has taken a new tack in its drive to offer new motors, joining a company that had developed a ...