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.

Most internal combustion engines are incredibly inefficient at turning fuel burned into usable energy. The efficiency by which they do so is measured in terms of "thermal efficiency", and most ...

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 ...

You may not hear about the thermal efficiency of engines much: It's the ratio of how efficiently they use the energy in the fuel they burn. Conventional gasoline engines have long run about 25 percent ...

One of the main problems engineers face with the internal combustion engine is upping its thermal efficiency. To the uninitiated, an engine with a thermal efficiency of 30% is losing 70% of the heat ...

Scientists in Ghana have developed a device that combines a conventional solar PV-powered steam cooker with sand-based thermal energy storage. The system can achieve a thermal efficiency of 38.9% and ...

In experiments involving a different new technology, thermal diodes, Peter Hagelstein (MIT) worked with Yan Kucherov, now a consultant for the Naval Research Laboratory, and coworkers to demonstrate ...