Load transfer point offset of rocking journal wristpins in uniflow-scavenged, opposed-piston engines with phased crankshafts
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United States of America Patent
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Dec 12, 2017
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app pub date -
Jun 5, 2015
filing date -
Jun 5, 2015
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Abstract
Load transfer point offset of rocking journal bearings in uniflow-scavenged, opposed-piston engines with phased crankshafts includes differing offsets for the load transfer points of opposed pistons. More specifically, under the condition that a first crankshaft leads the second crankshaft, an angular offset of a rocking journal wristpin of a piston coupled to the first crankshaft proportional to an offset of the first crankshaft relative to the second crankshaft is made to ensure adequate oil film thickness to the wristpin when it experiences a peak combustion pressure during a power stroke.
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