In a closed-cycle simulation, they found that the 4-stroke (4S) showed an indicated thermal efficiency (ηfuel) of 47.5%; the opposed-piston 4-stroke (OP4S), 50.1%; and the opposed-piston 2-stroke ...

Revealed in 2018 at the Detroit Auto Show in a late model Ford F-150, Achates reported that the 2.7-liter two-stroke, fuel-sipping opposed-piston gasoline compression ignition engine delivers 270 ...

Two-stroke engines combine multiple cycles into the same stroke of the piston. A two-stroke engine combines intake (“scavenging”) and compression into one stroke, then ignites the charge and ...

The free piston engine, a design with opposed pistons working against compressed air springs and combining both compression and firing strokes in a single axis, doesn’t turn anything in itself ...

Achates Power announced that it has achieved ultra-low emissions with its 10.6-liter two-stroke diesel. The opposed-piston engine reached an ultra-low NOx standard of .02 g/bhp-hr in the company ...

A 10.6-liter 3-cylinder opposed-­piston engine can deliver 450 horsepower and 1,750 pound-feet of torque and replace a 13-liter four-stroke engine.

“These two-stroke advantages are even more significant with an opposed-piston engine thanks to its higher power density and efficiency.” VIDEO: Behind the News: A New Type of Engine?

Photo via Achates Power. Achates Power Inc., the developer of modern two-stroke, opposed-piston engines, says it has secured another contract with a leading global original-equipment manufacturer.

News Opposed-piston engine is a breakthrough using old technology Courtesy of Achates Power Inc. The opposed-piston engine from Achates Power Inc. By Detroit Free Press ...

Four piston engine Monolith Engines has developed a set of dual (Fig. 1) and quad (Fig. 2) opposed piston engines (watch Two and Four Cylinder Single Stroke Opposed Piston Engines on Engineering TV).