Delphi engine
 

Looks promising.

Green Car Congress: Delphi advancing Gasoline Direct-Injection Compression-Ignition engine concept; new two-stage supercharger/turbocharger boost system

regards
Mech

I always wondered when something like that would come along, and didn't understand the hurdles to overcome because it seems simple in concept.

I felt the same way Frank, when emissions controls first came to be in the lat 60s-early 70s. Why not design the engine to produce the lowest emisssions instead of adding on crap to treat them after the fact.
I think the control strategies and processing power were the parts that needed more development, but then we now have a much better knowledge of the interaction of EGR compared to what we knew way back then.
EGR may eventually replace the throttle plate in engines.
Also mulitple sequential injections of fuel after TDC to spread out the "push" on the piston top that produces power with a lower peak pressure.

regards
Mech