Direct injection has been around for quite sometime , but just on higher end models mostly
I came across this blurb on D.I. if this helps
One of the biggest delays in getting GDI-equipped cars to the masses has been the fine-tuning research and development needed to make them as reliable as their standard counterparts. Automotive component suppliers including Bosch, Delphi, Denso and Siemens have come up with solutions: Rugged, high-pressure fuel injectors and the sophisticated electronics to make them perform optimally in GDI engines.