2019 Volume 36 Pages 44-50
In pursuit of an ideal internal combustion engine capable of significantly reducing CO2 emission, Mazda developed the next gasoline engine Skyactiv-X with lean compression ignition that improves thermal efficiency. Skyactiv-X needs to fully control auto ignition phenomena caused by chemical reactions of air-fuel mixture such as compression ignitions and knocking, and to realize the control, model-based developments using simulation technology is essential. Accordingly, Mazda improved the precision of the Mazda-developed-flow and spray simulation technology through phenomena elucidations by fundamental researches, and established a new combustion simulation technology considering elementary reactions. This simulation technology was also used to analyze knocking phenomena occurred at high loads and speeds to confirm the direction of the phenomena control.
