Mazda Motor Corp. has disclosed plans to introduce a next-generation engine called SKYACTIV-X in 2019. SKYACTIV-X will be the world’s first commercial gasoline engine to use compression ignition, according to the company.
The SKYACTIV-X engine will feature an fuel-air mixture that ignites spontaneously when compressed by the piston. Mazda’s proprietary combustion method-called Spark Controlled Compression Ignition-overcomes two issues that had impeded commercialization of compression ignition gasoline engines: maximizing the zone in which compression ignition is possible and achieving a seamless transition between compression ignition and spark ignition.
The new combustion engine combines the advantages of gasoline and diesel engines to achieve outstanding environmental performance, power and acceleration performance, according to Mazda.
Compression ignition and a supercharger fitted to improve fuel economy together deliver unprecedented engine response and increase torque 10-30 percent over the current SKYACTIV-G gasoline engine. It also makes possible a super lean burn that improves engine efficiency up to 20-30 percent over the current SKYACTIV-G, and from 35-45 percent over Mazda’s 2008 gasoline engine of the same displacement. SKYACTIV-X even equals or exceeds the latest SKYACTIV-D diesel engine in fuel efficiency.
With high efficiency across a wide range of rpms and engine loads, the engine allows much more latitude in the selection of gear ratios, providing both superior fuel economy and driving performance, according to Mazda.
The SKYACTIV-X engine fits into Mazda’s new Sustainable Zoom-Zoom 2030 longterm vision for technology development through the year 2030.
In light of the rapid changes taking place in the automotive industry, the new vision takes a longer-term perspective and sets out how Mazda will use driving pleasure, the fundamental appeal of the automobile, to help solve issues facing people, the earth and society.