Mazda's new SkyActiv-X engine has taken the spark plug out of the gasoline ignition equation and replaced it with diesel's compression scheme.
To be released in 2019, the company's next-generation engine, called SKYACTIV-X, will be the world’s first commercial gasoline engine to use compression ignition.
At the core of Mazda's upcoming range of engines is technology called Spark Controlled Compression Ignition. The proprietary combustion technology 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.
Mazda says this is an evolution of its ultra-high compression ratio being used in its current range of engines. This process allows the engine to operate at lower temperatures, which reduces a lot of the heat energy normally lost in gasoline engines.
In terms of fuel economy, the new technology SkyActiv-X engine will run with a much leaner air-fuel mix for better fuel consumption and lower emissions. The company estimates the SkyActiv-X engine will use up to 30 percent less fuel and when coupled with a supercharger deliver up to 30 percent more torque.