Breathing device for four stroke engine

摘要

The breathing device for the 4 stroke engine includes a first separating chamber formed as a tappet chamber and a second separating chamber provided above a crank case. The second separating chamber is arranged above the first separating chamber. The crank chamber and the first separating chamber are communicated to each other by a first oil return port and a first vent arranged above the first oil return port. The first separating chamber and the second separating chamber are communicated to each other by a check valve. The second separating chamber and the crank case are communicated to each other by a second oil return port.