[B Knotts]

I don’t see the point. It’s like a diesel, but less flexible, and requires a specific fuel with less energy density. Where’s the advantage?

[taildragger]

Less weight and cost of a Diesel to name two.

I now I am going to get grief from the latest generation Diesel folks, but non of the cold weather issues, and some of the Diesel high cost add-on band aids like Urea canisters etc. to meet emissions.

From what I read fuel economy in narrow bands increases as much as 40% and emissions can drop as much as 80%.

Also I have read it works better with poorer grade fuels, (less octane) which opens up all sorts of possibilities.

Google HCCI, interesting stuff....

I see it at the "Holy-Grail" for Piston Engines at this time.

BTW, there is a diesel version of this technology the acronym is PCCI (?).