Compression ratio is also what makes engines like Mazda's Skyactiv-G engine so efficient. The first of a wave of new high-compression and variable-compression engines from Mazda, ...

Racing engines tend to be very high compression, with NASCAR engines, for example, having a compression ratio of 12:1. High compression is also more efficient, so it would seem reasonable to ask ...

While Dieselgate killed any remaining enthusiasm for diesel cars in the U.S., heavy duty diesel trucks are still going strong ...

The Skyactiv-X engine has been designed to have a very high compression ratio—16:1 in fact—and to use a very lean air:fuel ratio, but both of these are just below the threshold needed for HCCI ...

The static compression ratio (sometimes called the mechanical compression ratio) is a handy reference that engine builders use to build and describe engines, but no two engines with the same CR ...

Oil is a crucial part of every internal combustion engine. Diesel and gasoline engines work differently, meaning diesel oil ...

Increasing an engine’s compression ratio is a proven way of unlocking extra horsepower, but there’s a point of diminishing returns. The team at Garage 54, the Russian mechanics who built a V16 ...

These engines require such a high compression ratio because diesel fuel is less volatile than gasoline, so it's harder to ignite under the same conditions. This is where the piston shape kicks in.

It features a cast-iron engine block with 64cc aluminum heads but uses a longer, 4.0-inch stroke crankshaft and a lower ...

Compression can be used by search engines to detect low-quality pages. ... “The compression ratio heuristic described in Section 4.6 fared best, correctly identifying 660 ...