FIELD: engine building.
SUBSTANCE: crankcase of opposed internal combustion engine contains partitions, in which there are supports of crankshaft, and contains cavity of crank mechanism of variable volume, which is located between partitions, as well as oil cavity interconnected with cavity of oil pan connected to crankcase. Crankcase is made tunnel, one-piece. One of the partitions is made integral with the crankcase, and the other is connected to it by means of a detachable connection. On the outer side of each partition there is a through cavity of the drive sprocket, each of which is interconnected with the oil cavity of the crankcase and with the through cavity of the chain transmission of the cylinder. Variable volume cavity is connected to the oil cavity by means of a bypass channel in which a check valve is installed with the possibility of bypassing the gas medium from the variable volume cavity when its volume decreases into the oil cavity.
EFFECT: simplified design, higher reliability of the engine.
1 cl, 7 dwg
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