Quote:
Originally Posted by Old Tele man
Does NOT sound like a "ground-breaking" design breakthrough, by any means.
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Actually, none of the improvements added to the Otto cycle engine throughout its history is worth being deemed "groundbreaking", since the basic operating principle remains exactly the same. Electronic controls, direct injection, forced induction, all did have some benefit to fuel-efficiency and/or performance, and so many valvetrain configurations eventually had their pros and cons, but it's all far from being so "revolutionary" as it's usually pointed out by enthusiasts of each setup. Maybe only the HCCI is going to be an outstanding departure from the original concept of Otto engines.