Exhaust manifold of an internal combustion engine

Abstract

The invention relates to an exhaust manifold (18) of an interna! combustion engine (20), with a number of exhaust pipe bends (1) corresponding to the number of cylinders of the internal combustion engine (20), said exhaust pipe bends being brought together at one end into an input flange (2) which can be fastened to the internal combustion engine (20), and being brought together at the other end; with a supply gas duct (21 ) which is connected at one end to a collector component (4) and at the other end to a rotor space (15) of a turbine housing (17) of a turbine of an exhaust-gas turbocharger; and with at least one compensator (19') for compensating for thermal stresses in at least one exhaust pipe bend (1) and the supply gas duct (21), wherein the at least one compensator (19') is designed as a component which is integrated in at least one exhaust pipe component (1).

Description

technical field [0001] The invention relates to an exhaust manifold of an internal combustion engine according to the preamble of claim 1 . Background technique [0002] An exhaust manifold of this type is known from EP 1 426 557 A1. [0003] A technical problem that arises in the case of this type of exhaust manifold is thermal expansion, which occurs both between the exhaust pipe elbows themselves and between said pipe elbows and the Pipes on an exhaust gas between the turbocharger's turbine housing and the air supply duct. This thermal expansion must be compensated in order to avoid damage. If the exhaust manifold is designed as a double-walled, air-gap insulated (AGI) manifold, multiple internal sliding fits are used to compensate for it, however these internal sliding fits are not airtight because of the formation of The sliding fits of the tube parts are merely inserted one inside the other, but are not welded to each other in a gas-tight manner. However, these lea...

AI Technical Summary

Problems solved by technology

If the exhaust manifold is designed as a double-walled, air-gap insulated (AGI) manifold, multiple internal sliding fits are used to compensate for it, however these internal sliding fits are not airtight because of the formation of These tube parts which are slip fit are merely inserted one inside the other, but are not welded to each other in an airtight manner

However, these leaks that occur as a result of these internal tubes of the AGI manifold smooth out these exhaust pressure fluctuations which in the case of twin scroll applications are for better utilization of power and thus required for improved performance

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