crankcasescavenged
Crankcase scavenged refers to a method of scavenging used primarily in two-stroke internal combustion engines, where the crankcase itself serves as the reservoir and pump for the fresh air–fuel charge. In this scheme, the incoming mixture is drawn into the crankcase during the piston’s downstroke, often through a reed valve or similar intake device. As the piston rises, the decreasing crankcase volume pressurizes the trapped charge and forces it through transfer ports into the combustion chamber, aiding the expulsion of exhaust gases and filling the cylinder with a fresh charge.
In a crankcase-scavenged engine, the timing and geometry of transfer ports, the crankcase volume, and any intake
Advantages of crankcase scavenging include simplicity, light weight, and low manufacturing cost, since the crankcase serves