Combustion engine, esp. 2-stroke motor for hand-held chain saws etc. has resonator tube partially/wholly integrated in engine housing wall, to save space

摘要

The engine has a housing (8) with combustion chamber (3), having an exhaust outlet (10) in flow connection with a resonator tube (16). The tube is at least partially integrated in the housing wall (22). The outlet is in connection with an exhaust silencer (11). The silencer intake (13) is located near its opening (17) in the resonator tube. The tube may extend partially along the periphery of the crankcase (4). Silencer and resonator tube have an overall volume of 100cmapproximately3 to 300cmapproximately3, esp. 150cmapproximately3 to 230cmapproximately3.