TWO-CYCLE ENGINE WITH LAYER-BY-LAYER BLOWDOWN Russian patent published in 2012 - IPC F02B25/22 F02B25/16 

FIELD: engines and pumps.

SUBSTANCE: two-cycle engine with layer-by-layer blowdown includes piston, cylinder containing a piston with possibility of its back-and-forth movement, crankshaft that is connected to the piston by means of a piston-rod; casing containing the crankshaft with possibility of its rotation, gas mixture channel that supplies the gas mixture to the casing, blowdown channel that is continued between inlet blowdown opening that opens to the casing and blowdown opening that opens to cylinder and air channel that is connected to blowdown channel in intermediate position for supply of the air to blowdown channel. On some part of upward piston stroke, during which the piston moves towards the opposite side in relation to casing, the latter is connected to blowdown channel through blowdown opening; at that, negative pressure is created in the casing. Resistance to the flow from intermediate position of the blowdown channel where the air channel is connected to blowdown opening is lower than resistance to the flow from intermediate position, where air channel is connected to inlet blowdown opening. Versions of two-cycle engine design with layer-by-layer blowdown are described.

EFFECT: large amount of the air introduced to blowdown channel from air channel flows to blowdown opening and can enter the cylinder without changing the flow direction.

20 cl, 7 dwg