This pressure closes the reed valve so that further downward movement of the piston compresses the trapped air-fuel mixture in the crankcase.
当活塞向下运动直到露出进气口,可燃混合气所具有的压力使其上升,通过进气口进入气缸。
"There are holes under the reed valve that connect to the engine carburetor. When the piston is moving up, a partial vacuum is produced in the sealed crankcase.
在片簧阀的下面有孔道与化油器相连。当活塞向上运行时,就会在密封的曲轴箱里产生部分真空。
The scavenging system is composed of crankcase, main scavenging passage, sub passage stratifying pipe, reed valve and carburettor.
该分层扫气系统由曲轴箱、主扫气道、副扫气道、分层管、笛簧阀和化油器等组成。
reed valve induction
簧片阀进气
Atmospheric pressure lifts the reed valve off the holes, and air-fuel mixture enters the crankcase. After the piston passes TDC and starts down again, pressure begins to Build up in the crankcase
The crankcase is sealed except for a leaf, or reed, valve at the bottom. The reed valve is a flexible, flat metal plate that rests snugly against the floor of the crankcase