H4 engines are horizontally opposed four-cylinder engines also commonly known by names like flat-four and boxer. For comparison, most four-cylinder automobile engines are upright inline designs. The ...

The Subaru EJ engines seem to have caught the eyes of people building experimental light aircraft at home, but why are they ...

Ferrari continues to explore hydrogen-powered drivetrain solutions, patent documents discovered by AutoGuide.com indicate Ferrari is looking at a two-stroke 3- or 6-cylinder opposed piston engine ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Bore and Stroke: 92.08 mm (3.625 in.) ...

An OP can be configured and packaged to fit the vehicle it’s intended for. For trucks, the cylinders are likely to be vertical or slanted. Photo: Achates Power Security’s tight at Achates Power Inc.

Bore and Stroke: 127 mm (5 in.) x 102 mm (4 in.) Once the largest independent manufacturer of automotive engines, Detroit’s Continental Motors Corporation purchased the rights to a single-sleeve valve ...

The diesel engine, we’ll all agree, is a terrific machine and is likely to be with us for many, many years to come. Will it always run on diesel fuel? Clearly not, at least not exclusively. But what ...