Car manufacturers are delving deep into their boxes of tricks to make internal combustion engines more efficient. Infiniti unveiled a variable compression ratio engine last year, and hybrid technology ...

A.Here's a pressure-volume diagram for a combustion engine. Although rough, it is an approximation of the so-called air-standard cycle. '' Point (a) is at atmospheric pressure, after which the air is ...

Yup, Mazda’s 2.0-litre ‘Skyactiv-X’ engine – the world’s first production-ready petrol that uses compression ignition – is finally finished. At first it’ll only be offered in the Mazda3, with either ...