Posted by MarkB_MI on February 09, 2010 at 03:20:19 from (166.217.30.100):
In Reply to: opposed piston engine posted by Doug - Iowa on February 08, 2010 at 10:13:46:
There have been many similar designs. One of the reasons for trying this approach is the belief that eliminating the cylinder head reduces energy lost from cooling. None has ever gone into production. I believe one problem is getting a good combustion chamber shape while maintaining an acceptable compression ratio.
Hundreds, probably thousands, of internal combustion engine designs have been tried over the years. The reason none have succeeded isn't so much that they didn't have merit, but rather that the poppet-valve piston engine is so well understood that it would take an enormous amount of work to catch up using an alternative design.
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