Portable chain saw IC engine suction noise insulation - involves resonance cavity with space between socket opening and pipe and filter plate

摘要

A structural element (10), in the form of a machine casing tank or other unit, incorporates a resonance space (20). It is filled on the chain-saw assembly which is driven by an I.C. engine and provided with a suction noise attenuating system. this space is linked to a carburettor (15) with a suction pipe socket (16). The suction opening n17) is sited at an interval from a suction pipe (25), forming an intervening space (18). Air sucked in passes through a chamber (30), and there is a filter plate (35) covering the flow surface, fitted with an advance air supply chamber (40) with an air intake pipe socket (41). Noise insulation and air filtering are increased and the unit is compact.