MAZDA

How does the brand engine that works with Diesel/Gasoline?

Mazda has long been promising the revolutionary Skyactiv-X engine. Finally, we are only a few months away from drivers having access to the first units. Mazda 3 orders with the 2.0 Skyactiv-X can already be confirmed in several European markets, with first deliveries scheduled for October.
The Mazda 3 is the latest vehicle of the Japanese brand, with the particularity of representing the manufacturer in the most important sales segment of the European market. It is currently being proposed with petrol and diesel engines, but after summer will make available the version that everyone talks about and that, despite being gasoline, works like a diesel, promising lower fuel consumption and emissions.
The Skyactiv-X is basically a two-in-one, ie an atmospheric 2.0 gasoline engine that has the ability to, under low load (reduced throttle pressure), function as if it were a diesel unit, having for such a compression ratio of 16.3: 1 - huge for a gasoline unit and almost at the level of a diesel engine (22: 1). This means that the air / gasoline mixture is admitted and compressed, with the ignition being performed by compression as if it were a diesel engine. Since the engine is equipped with a Roots-type volumetric compressor to increase available air, the excess air - typical of diesel engines - under these conditions (traveling at constant speed) ensures a lower temperature combustion, thus producing less NOx, which allows Skyactiv-X not to need SCR, a catalytic nitrogen oxide selector, which always means that the innovative Mazda engine is not being used in low load situations, ie when the throttle depresses the throttle More dynamically, the Skyactiv-X begins to function like a normal gasoline engine, ie without the poor air / gasoline mix it used before. In addition to these two modes of operation, the first with fuel and emission advantages, Skyactiv-X also has, like the other Mazda 3 petrol engines, a 24V mild hybrid system, which takes about 0, 3 to 0.5 l / 100 km at average consumption. This system, which can be translated as a “smooth” hybrid, does not guarantee electric driving due to the small capacity of the battery and the electric motor. But whenever the driver accelerates, the electric motor helps the gasoline, reducing its effort and lowering fuel consumption.

The end result is a 180 hp Skyactiv-X 2.0 which, once mounted on the five-door Mazda 3, achieves average fuel consumption of 5.5 l / 100 km (according to WLTP) with 16 ”rims, manual transmission and traction. at the front (equivalent to 125 g / km of CO2), with the figure rising to 5.8 liters with 18 ”rims. By comparison, the Skyactiv-G conventional engine, also a 122 hp mild hybrid atmospheric gasoline 2.0, advertises 5.1 l / 100 km average and 117 g / km CO2. It works with AdBlue injection. Autonews