FIELD: mechanical engineering; internal combustion engines.
SUBSTANCE: proposed exhaust system of internal combustion engine contains at least one unit of permanent joint of pipe of exhaust manifold with its fastening flange on member of housing of internal combustion engine. Flange is formed by casting of end section of pipe with metal alloy in mould. Metal alloy melting temperature is lower than melting temperature of pipe material and coefficient of temperature expansion of which exceeds coefficient of temperature expansion of pipe material and heat transfer coefficient of which is at least twice as great as heat transfer coefficient of pipe material. Flange and mating member of housing, for instance, cylinder head, are made of identical material, mainly of aluminum and/or magnesium alloy. Outer flanging is formed on end of pipe section filled with metal alloy, for instance, in form of conical bell whose input cut coincides with connecting plane of flange. Or end of pipe section filled with metal alloy is provided with ring or conical flanging dipped into flange so that inlet hole in flange coincides with inner channel of pipe. Also end section of pipe is made up of number of alternating in steps coaxial sections of different outer diameter, section of pipe with minimum outer diameter being arranged from side of flange. Moreover, end section of pipe is made conical so that thickness of wall of pipe in zone of inlet cut is 0.4-0.6 of thickness of cylindrical wall of pipe.
EFFECT: simplified design of device, improved reliability in operation.
3 dwg
