Interesting engine concept...

[Fuelie Fan]

I thought I was a genius when I thought of the same thing in school before I read about this. At any rate, it's success is in part driven by horrible carburetors, intakes, and combustion chambers that could not adequately prepare the charge. It doesn't have any place in modern engines, and in fact with direct injection a trend back towards heterogeneous mixtures is to be expected.