INTERNAL COMBUSTION ENGINE EXHAUST DEVICE Russian patent published in 1999 - IPC

FIELD: mechanical engineering; vehicle exhaust systems. SUBSTANCE: device has exhaust pipe with tubular member installed coaxially from outside by means of rigidly secured ribs in form of spiral vanes. Tubular member has diverging part behind exhaust pipe cut. Dovetail screw grooves changing into circular groove are made on inner surface of diverging part and are arranged longitudinal on this part. Circular groove is located at outlet hole of tubular member. The device improves ecological situation at discharge of exhaust gases from by cleaning the gases provided by swirling of exhaust gases with contaminants in form of solid and drop-like particles in diverging part of tubular member. Swirling of exhaust gases is provided when they move along longitudinal screw grooves made on inner surface of diverging tubular member. EFFECT: enhanced cleaning of exhaust gases. 4 dwg