In this mode, fuel is injected during the intake stroke in a lengthy, cone-shaped spray to cool the cylinder through evaporation. By preventing knocking through the cooling effect, the 4G93 GDI engine can run at a compression ratio of 12.5, for outstanding power and torque. Furthermore, its high volumetric efficiency creates an effect similar to that of a supercharger. The result: output and torque superior to conventional engines.Superior Output Mode 1. Piston moves downward. 2. Fuel is injected. 3. Piston moves up. 4. Sparkplug ignites mixture.