Exhaust system and associated exhaust treatment device
AssigneeJ. Eberspaecher GmbH & Co. KG
InventorSylvia Hartmann
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Abstract
This invention relates to an exhaust treatment device for an exhaust system of an internal combustion engine, particularly in a motor vehicle. The device comprises a housing in which at least one exhaust treatment insert is arranged, and which is composed of at least two housing sections at least one of which consists of a ferritic material and at least another of which consists of an austenitic material. In order to increase the thermal resistance of the device at least one ferritic housing section is secured to at least one austenitic housing section by means of a connection, wherein this connection consists of a material whose coefficient of thermal expansion lies between the coefficients of thermal expansion of the ferritic material and of the austenitic material.
Claims38
An exhaust treatment device for an exhaust system of an internal combustion engine, comprising:
- a housing having at least two housing sections, at least one of which includes a ferritic material and at least one other of which includes an austenitic material;
- at least one exhaust treatment insert arranged in the housing;
- and,
- means for connecting the at least one ferritic housing section to the at least one austenitic housing section, wherein the connection is composed of a material having a coefficient of thermal expansion between the coefficients of thermal expansion of the ferritic material and the austenitic material
An exhaust system for an internal combustion engine, comprising:
- an exhaust line conducting exhaust gas and comprising at least two components;
- and,
- a connection fastening at least two of the components together;
- wherein one of the components is composed of a ferritic material, at least in a region adjacent to the connection, and the other component is composed an austenitic material, at least in a region adjacent to the connection;
- and,
- wherein the connection is composed of a material whose coefficient of thermal expansion lies between the coefficients of thermal expansion of the ferritic material and the austenitic material.
An application of a connection material in a connection inside an exhaust system of an internal combustion engine of a motor vehicle, or inside an exhaust treatment device for such an exhaust system for securing a first component of ferritic material to a second component of austenitic material, wherein the connection material has a coefficient of thermal expansion between the coefficients of thermal expansion of the ferritic material and the austenitic material.
The application according to claim 27, wherein the ferritic material is a ferritic steel of grade 1.409, 1.4510, 1.4512 or 1.45131.
An exhaust treatment device for an exhaust system of an internal combustion engine in a motor vehicle, comprising:
- a housing;
- at least one exhaust treatment insert arranged in the housing;
- wherein the housing is composed of, at least in a region in which the at least one exhaust treatment insert is arranged, of a material with a coefficient of thermal expansion between the coefficients of thermal expansion of a ferritic material and an austenitic material.
Dependencies are inferred from the claim text.