| 摘要 |
PURPOSE:To increase the torque during low and medium revolutions of an engine by providing vanes on both outer circumferences of a crankshaft of a two cycle engine and providing ports on the left and the right continuously feeding the air into a crankcase. CONSTITUTION:Vanes 2 are provided on the outer circumferences of a crankshaft 1, and a valve 5 connecting to a carburetor 6 is also provided. The inlet air 3 with a volume larger than that of a piston stroke is continuously sucked into a crankcase 7 by means of a revolving force F of the vanes 2. The pressure in the crankcase 7 is raised even beyond the bottom dead point by means of the vanes 2 revolving at the same speed as that of the crank 1, therefore, a scavenging pressure 8 is also raised. Thereby, the torque during low and medium revolutions of the engine can be increased. |
