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Not new
May 11, 2007 by Michael Tiller (not verified), 2 years 28 weeks ago
Comment id: 23606
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As C. Russ pointed out, variable valve actuation is nothing new. Furthermore, HCCI is nothing new and the combination of them together is nothing new. Finally, cycle simulation models to of HCCI are also not new.
Now HCCI is a fascinating approach and it does hold lots of potential but also lots of technical challenges. I just don't think calling this a "major leap" is accurate.