| 摘要 |
PURPOSE:To improve the efficiency of an engine and reduce unburned ingredients by providing small chambers on the inner wall of a cylinder, allowing scavenging air flow to collide against these small chambers to damp down the quantity of motion of said scavenging air, and producing layers of scavenging air. CONSTITUTION:A scavenging flow damping chamber 18 is provided on the inner wall of a cylinder on the opposite side of an exhaust port 14 against the axis of the cylinder 1. A plural number of scavenging ports which are symetrically positioned to each other with respect to a line connecting the center of the cylinder 1 to the center of the exhaust port 14, are divided by 27, and 19, 20 respectively. Thereby scavenging air flowing out partitions 15, 16 for controlling scavenging flow, into each pair of ports 17, of the scavenging ports 17, 19 collide against each other, while also against the inner wall of the chamber 18, and are prevented from being diffused. Scavenging airs flowing out of the scavenging ports 27, 20 also collide against each other, pushing out incinerating gas toward the exhaust port 14. Thereby, new air is distributed on the opposite side of the port 14 within the cylinder 1, while incinerating gas is distributed on the exhaust port side. |
