New Gasoline Engine that Uses Compression Ignition

Introducing SKYACTIV-X: World's first commercial gasoline engine to use compression ignition.


A car works by four-piston internal combustion engine where fuel and air combust. The combustion creates the energy to move the pistons, which in turn move the car. No doubt, automobile engines have been in constant evolution since the beginning of motoring.

Now, in this technology era, where we all are focusing electric cars, a Japan based company called Mazda brings a new car engine that will eventually come on the scene. Mazda is introducing a sort of car engine that they call Skyactiv-X.

The company noted, they are introducing the world’s first commercial gasoline engine to use compression ignition. Inside the engine, the fuel-air mixture ignites spontaneously when compressed by the piston. The combustion method is tagged Spark Controlled Compression Ignition.

Mazda R&D head Kiyoshi Fujiwara said, “We think it is an imperative and fundamental job for us to pursue the ideal internal combustion engine. Yes, electrification was necessary but the internal combustion engine should come first.”

Sometimes the engine becomes homogenous charge compression ignition engine. Means, It is like a holy grail for internal combustion engineers for decades. But it seamlessly changes over to a regular spark-ignition engine under certain engine operating conditions.

The company noted, “the method overcomes two issues that impeded commercialization of compression ignition gasoline engines. 1. Maximizing the zone in which compression ignition is possible and 2. Achieving a seamless transition between compression ignition and spark ignition.”

“It also enabled ‘a super lean burn’ that improved engine efficiency up to 20 to 30 percent over the current Skyactiv-G.”

The engine involves advantages of both gasoline and diesel engines. It makes the engine to achieve outstanding environmental performance, power and acceleration performance.

Features of this World’s first commercial gasoline engine

  • Improves fuel economy
  • Deliver unprecedented engine response
  • Increase torque 10–30 percent
  • 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.
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