Mazda HCCI engine

Mazda's Skyactiv-X engine looks to employ lots of technology to make HCCI feasible.

http://www.motoiq.com/MagazineArticles/ID/4611/Nerd-Alert-Mazdas-Skyactiv-X-Engine.aspx

It looks quite promising! I hope they get it nailed down and others follow suit. Who isn't going to want more efficiency?