Quote:
Originally Posted by UFO
What about extending the intake duration into the compression stroke? Would this be a cam used in concert with a high static compression ratio to get the more efficient power stroke without the detonation issues of high intake charge compression?
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That's the most usual setup in the current generation of hybrids. So-called "Atkinson cycle", altough it's not the real Atkinson which actually uses an articulated crankshaft to provide a power stroke longer than the compression stroke. Before hybrids got mainstream, this setup was quite popular in stationary and marine engines, coupled to a supercharger to overcome the discompression generated from the longer intake timing, in the so-called Miller cycle.