SkyActiv

SKYACTIV is a brand name for a series of technologies developed by Mazda which increase fuel efficiency and engine output. The initial announcement of the SKYACTIV technologies include new engines, transmissions, body, and chassis, which appeared in Mazda products from 2011.

The Mazda SKY concept

The precursor of SKYACTIV, which featured a Mazda SKY-G 2.3-liter direct injection gasoline engine, a Mazda SKY-D 2.2-liter diesel engine, a SKY-Drive automatic transmission, a Mazda Kiyora with SKY-G 1.3 engine and SKY-Drive automatic transmission, was unveiled at the 40th Tokyo Motor Show in 2008.

SKYACTIV-G

The SKYACTIV-G or formerly SKY-G is a family of direct injection gasoline engines. The engine compression ratio is increased to 14:1. To reduce the risk of engine knock at high compression, residual gas is reduced by using 4-2-1 engine exhaust systems, implementing a piston cavity, and optimizing fuel injection. In addition, combustion duration is shortened by intensifying air flow, increasing injection pressure, and using multi-hole injectors.