FIELD: engine building.
SUBSTANCE: essence of invention consists in the fact that two-stroke ICE cylinder with opposite blowdown method consists of blowdown channels connecting engine crank chamber with cylinder over-piston space at piston position at bottom dead point (bdp). At least two channels at the outlet into the cylinder are directed aside above the opening of the outlet channel upwards to the cylinder head and towards each other at angle from 0 to 50 degrees to the vertical axis of the cylinder in the longitudinal direction to the outlet opening, in the same range to the cylinder vertical axis in the transverse direction at angle of 50 to 100 degrees to the horizontal longitudinal axis in a top view, and at least two channels at the cylinder outlet are directed towards the side opposite to the outlet channel with the upward movement along the cylinder at angle from 0 to 90 degrees to the cylinder vertical axis in the longitudinal direction from the outlet window, in the same range to the cylinder vertical axis in the transverse direction at angle of 50 to 100 degrees to the horizontal longitudinal axis in the top view. At least one additional channel at the cylinder outlet on the side opposite to the outlet opening is directed towards the cylinder head center at angle of 20 to 50 degrees to the cylinder vertical axis in the longitudinal direction to the outlet opening. Also, the height of the windows of the cylinder of blowdown channels is made at level of 0.2 to 0.7 of the height of the outlet channel and the upper edges of the blowdown openings of the cylinder are located at a height below the height of the upper edge of the opening of the outlet channel at level of 0.3 to 0.8 of the height of the window outlet channel. Result is achieved due to absence of emissions of fuel mixture in opening channel window.
EFFECT: higher efficiency and reduced toxicity of two-stroke internal combustion engines (ICE).
3 cl, 4 dwg
