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Historically, the opposed-piston engine set combined records for fuel efficiency and energy density that have however to be met by any other engine form. Then, the port is closed by the skirt of piston 44 as the crankshaft moves 270 degrees to best dead center and thence, therepast 90 degrees. An opoc® engine has no cylinder heads, valvetrain components, or other mechanicals connected with standard engines. FIGURE 1 is a side elevational view of a single cylinder opposed piston engine constructed according to the principles of the invention and arranged for operation with steam or compressed air.
The exhaust port 46, positioned near the base of the cylinder, is commonly closed by the elongated skirt of the piston 43 and opens by movement of the face of the piston therepast as the main crankshaft moves to bottom dead center and once more closes as the crankshaft moves past bottom dead …
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