Mazda’s Skyactiv-X compression ignition engine is pushing the limits of what is possible with a mass-market automobile engine, but the Japanese automaker evidently believes HCCI is but the beginning.

Nissan is developing an engine for road cars that could reach 50% thermal efficiency, meaning the potential for much more fuel-efficient cars. An engine's thermal efficiency is a measure of how much ...

Dongfeng Motor has publicly released comprehensive technical details for its Mach 1.5T hybrid gasoline engine, which the company reports achieved a maximum thermal efficiency of 48.09 per cent.

The effects of compression ratio on brake thermal efficiency at full load as well as part load operating conditions typical of those encountered in the CAFE test procedure are important considerations ...