Internal combustion engine with a single crankshaft and having opposed cylinders with opposed pistons
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United States of America Patent
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Jan 9, 2001
Grant Date -
N/A
app pub date -
Jan 21, 1999
filing date -
Sep 11, 1998
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Abstract
A two-stroke internal combustion engine is disclosed having opposed cylinders, each cylinder having a pair of opposed pistons, with all the pistons connected to a common central crankshaft. The inboard pistons of each cylinder are connected to the crankshaft with pushrods and the outboard pistons are connected to the crankshaft with pullrods. This configuration results in a compact engine with a very low profile, in which the free mass forces can be essentially totally balanced. The engine configuration also allows for asymmetrical timing of the intake and exhaust ports through independent angular positioning of the eccentrics on the crankshaft, making the engine suitable for supercharging.
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