PROCESS AND DEVICE FOR SCAVENGING THE CYLINDER OF A TWO-STROKE ENGINE, WITH SUPERCHARGING BY THE EFFECT OF POST-FILLING, AND ENGINE RELATED THERETO

摘要

The invention relates to a method and a scanning device of a cylinder of an internal combustion two stroke engine, with self-supercharging by post-filling effect. This device is characterized in that the inlet group (12a, 12b; 14a, 14b) is arranged relative to the cylinder (10) so that the scavenging air flows from the inlet ports (12a, 12b) meet in a point of impact situated on the upper wall (10a) of the cylinder (10) above the exhaust ports (16) to perform a reverse said loop; and altitude (A) the lower edge of the inlet ports (12a, 12b) is arranged high enough in the cylinder (10) relative to the elevation (B) of the upper edge of the exhaust ports (16) for substantially completely eliminate any possibility of crossing of the air flows entering the cylinder (10) with the flue gas exiting the cylinder (10) in the path between the input points of the scavenging air flows and their point 'impact. Thus a radical improvement of the scan, which improves engine operation.