Quote:
Originally Posted by Occasionally6
The pressure in the cylinder at the bottom of the expansion stroke is always higher than that at the top of the compression stroke in the next cylinder to fire.
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I need to check this. If it is not so, 4 cylinders won't be enough, at least not without the crankshaft acting as the flywheel.
Quote:
Originally Posted by jeff88
Could pressure equalization, intake/exhaust timing and spark advance/retarding make it possible to eliminate the flywheel or is something else involved?
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There is still going to be a minimum number of cylinders required. It would not be possible to run a single cylinder engine without some inertia in the crankshaft to provide the work for the 3 non-firing strokes.