Mazda: 2019 Skyactiv-X engine boost economy by 30%

Mazda put a new version of the 2.0-Liter Skyactiv-X-engine into production next year with the promise of up to 30% improvement in fuel consumption over the existing Skyactiv-G petrol.

This number is said to be possible during the low-speed driving, but the company claims that 20% is also possible, average real world driving scenarios. The target outputs, when the Motor hits the market in the year 2019 is ft topping 187bhp and 170lb.

The development of engines, six prototype cars of Mazda 3 body were supported installed on the new Skyactiv architecture. The new Skyactiv-X engine is based on two technologies – lean combustion and compression ignition – reduce fuel consumption and CO2 emissions and delivers a good performance.

A conventional internal combustion engine mixes air with fuel in a ratio of 14.7:1 to burn the perfect blend gasoline in the cleanest way. Fuel to ignite a spark in the engine in the combustion chamber and burns until it is used up in a fraction of a second. A lean mixture can improve the economy, but to ignite more difficult and leads to unstable combustion.

The Skyactiv-X technology successfully treats these problems with spark and controlled auto-ignition (SPCCI), which ignites reliably, the entire lean air/fuel mixture is in the range between 30:1 and 40:1 in a slip. To feed Extra air, the lean-burn version, is delivered by a small, belt-driven, Rootes-type air pump.

A higher-than-normal compression ratio of 16:1 and produces almost enough pressure for combustion of the lean fuel-air mixture spontaneously, but not quite. This is what happens when a second dose of fuel is injected, and triggered by a spark to create a mini-ball of fire. The additional pressure through the ball of fire on the tips of the simmering main cargo over the edge and ignites it.

The Motor in this mode, in a large part of the range, but if the driver accelerates very hard, the engine switches to burning a conventional mode, a spark ignited 14.7:1 air to fuel mixture like any other gasoline-powered internal combustion engine.

SPCCI is a further development of a concept to as HCCI (homogeneous charge compression ignition), which tries a number of manufacturers, but not perfect, more than a decade ago. The biggest problem is the switch between HCCI-mode and conventional mode, now solved by Mazda, with SPCCI.

The new Skyactiv vehicle architecture is easier to improve the energy efficiency. It is also to improve the driver’s control by providing a smoother ride by reducing road shock into the cabin. A more rigid structure with a more lightweight steel components improves the handling and driving, and the introduction of thimble-large structures called “attenuation” node ” is reduced at crucial joints, noise and vibration in the cabin.

This engine is recently accompanied to betray a second look at the Kai-concept for the first time at the Tokyo motor show last year. The Kai is, clear lines are designed to take advantage of the light fall on the car surfaces, and suggest how the next Mazda 3 could look like on the basis of the Skyactiv architecture.

What is a Mazda 3, Skyactiv-drive X prototype?

The Skyactiv-X-engine has been significantly improved, since the Autocar tried an early prototype in the last year.

Driven back to back with a current Mazda 3 to a variety of Portuguese roads in both manual and automatic form, the prototype proved to be a surprisingly refined. It was a lack of combustion noise and, if at all, the engine was smoother and quieter than the production of Mazda 3.

Engineers say that the new architecture contributes to the smooth driving with improved separation between drive and road noise.

A screen, three green discs to indicate in which mode the Motor mode or ultra ran in the conventional lean burn lean mode. Lean mode, the accessible was most of the time on motorways and country roads, and the engine in lean mode when cruising at a constant speed, would quite often switch to the cheapest, ultra.

If it goes on sale, the new engine will be subject to the new WLTP test cycle, the so-called figures to give an accurate figure should be, what can expect buyers that in terms of economy and CO2 emissions.

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