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 ...

Converting the ignition of a fuel-air mixture into usable mechanical energy lies at the core of a dizzying number of internal combustion engines developed over the course of more than century.

Rudolph Diesel made tremendous progress in improving fuel efficiency by developing his diesel engine in the 1890s. Gasoline engines had been in development and commercial use for some years but were ...

Achates Power in San Diego says its opposed-piston engine, now in dyno testing, has achieved fuel efficiency that's 21% better thatn a benchmark V-8, the latest 6.7-liter PowerStroke from Ford, and ...