How does skyactiv

SKYACTIV-G works by increasing the compression ratio without a result in knocking—an abnormal combustion in which the air-fuel mixture ignites prematurely due to exposure to high temperature and pressure, thus creating an unwanted high-frequency noise. To increase the compression ratio and reduce the risk of knocking, residual gas is reduced using engine exhaust systems, implementing a piston cavity, and optimizing fuel injection. Additionally, the combustion duration is shortened by intensifying air flow, increasing injection pressure, and using multi-hole injectors, all of which work together to decrease the risk of knocking.

The original offering consisted of petrol and diesel engines, as well as an automatic gearbox. The focus of SkyActiv is efficiency, specifically the development of petrol and diesel engines with low emissions and high fuel economy but minimal downside in terms of performance. There are three main families of engines under the Mazda SkyActiv umbrella. These are SkyActiv-G - a range of direct-injection petrol engines, SkyActiv-D - a family of turbocharged diesel engines and SkyActiv-X - an advanced petrol engine using compression ignition technology.

There have been a number of different variants, the first of which entered production in SkyActiv-D turbocharged units meanwhile aim to eliminate the need for expensive NOx and particulate treatment in diesel engines with clean combustion processes. It runs on petrol but can ignite its fuel using the more efficient compression ignition technology of a diesel. The first retail Mazda using this was unveiled in Mazda has also previously shown off a SkyActiv-R concept, slated as the new generation rotary engine.

Unfortunately, this engine has not yet made production and details are scarce. In what was a re-design of a conventional automatic transmission, Mazda reduced the burden on the torque converter, which is disengaged most of the time by a multi-plate clutch.

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