How Mazda’s SkyActiv-X engine, based on HCCI, actually works (video)

Mazda HCCI engineEarlier this month, Japanese automaker Mazda laid out its future powertrain strategy and dropped a massive announcement in the process. In 2019, Mazda will introduce a gasoline-powered Homogeneous Charge Compression Ignition engine, dubbed Skyactiv-X, that the automaker promises will offer huge strides in efficiency and fuel economy. That means...