UNBURNED FUEL VENTING IN INTERNAL COMBUSTION ENGINES
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United States of America Patent
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Issued Date -
Nov 26, 2015
app pub date -
Dec 20, 2013
filing date -
Dec 21, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An internal combustion engine is disclosed. The engine may have a cylinder. The engine may also have a piston reciprocally movable within the cylinder between a top dead center (TDC) and a bottom dead center (BDC). The piston may separate the cylinder into an upper piston section and a lower piston section. The piston may have a piston ring assembly with a piston ring configured to sealingly contact the cylinder. The piston ring assembly may have a thickness (D). The engine may have an annular crevice in fluid communication with the upper piston section. The engine may also have a plurality of venting grooves that may fluidly connect the annular crevice with the lower piston section, only when the crank angle ranges from about 85° to 95° and about 265° to 275° after the top dead center (TDC).
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