Two-stroke engine with split casing

摘要

In a two-stroke engine with a two-part plastic crankcase (1), in which a crankshaft (3) is supported in two main bearings (roller bearings 2), and an aluminium cylinder (4) bolted to the two-part crankcase (1), it is proposed, in order to design the casing as air tight as possible, that a rubber-elastic toroidal sealing ring (6) be arranged in the separation joint of the two crankcase parts (1', 1'') of the two-part crankcase (1) composed of plastic, that the said toroidal sealing ring (6) be positively held in a seating groove (5) of at least one flange of the two crankcase parts (1', 1'') of the two-part crankcase (1) and that a sealing ring (10) with closed circumference be provided between the two-part crankcase (1) and the cylinder (4). <IMAGE>