Direct Injection Engines are Internal combustion engines with spark ignition and injection of fuel directly in to the chamber. They are a new trend of engines, in which the amount of fuel injected in to the combustion chamber can be moderated according to the power requirement.
The fuel and air mixture is controlled in direct injection engine as per the requirement. The mixture can be a rich mixture with more fuel than the available oxygen or Lean with more oxygen than required to burn the injected fuel for High and Low power output requirements.
FSRG is working on computational modeling of Direct injection on various engines
Direct Injection Engine Technologies