EXHAUST SILENCER FOR INTERNAL COMBUSTION ENGINE Russian patent published in 1995 - IPC

FIELD: engine engineering. SUBSTANCE: exhaust gases enters intermediate expansion chamber 10 through the inlet branch pipe 4 and inlet resonance chamber 8. The exhaust gases is expanded and decelerated and gives up the sound energy. After that, the gas flow is separated. A portion of gases is directed to the outlet perforated branch pipe 5 through nozzle 11. The other portion of gases is directed to the ring space defined by sides of housing 1 and branch pipe 5 with nozzle 11. When gases flows through nozzle 11, they accelerate and pressure drops in this zone. As a result, the gas is ejected from the ring space through the perforation holes at the part of outlet branch pipe 5. EFFECT: enhanced silencing. 1 dwg