A half shell joint structure includes a first joint portion formed at an edge of a first half shell and a second joint portion formed at an edge of a second half shell. One of the first joint portions and the second joint portion has a protruding portion protruding by a predetermined interval in an outer diameter direction. The protruding portion has a flat contact surface, and when the first joint portion and the second joint portion overlap with each other, the contact surface contacts an inner surface of the joint portion that the contact surface faces.

A method for producing a device for the aftertreatment of exhaust gases and for coating a honeycomb body, provided in the device, with a catalytically active surface coating. The honeycomb body is formed from a multiplicity of metallic, at least partially structured foils stacked one on another and wound so that the honeycomb body forms a multiplicity of flow channels through which fluid can flow along a main flow direction. The honeycomb body is received in an inner casing and is durably connected thereto. The inner casing is arranged in an outer casing serving as a housing and is durably connected thereto. Before the introduction of the catalytically active coating into the flow channels formed by the honeycomb body, an air gap or air gaps, which have been formed between the outer casing and the components arranged therein, are filled by a filler.

A pipe unit for arrangement in a conduit for a gaseous medium, comprising a pipe-shaped body, a pipe-shaped flexible sealing element, which is fixedly attached at a first end outside the pipe-shaped body and which comprises a flange element at a second end. The flange element is detachably attachable to a flange element in a connecting pipe in the conduit, in order to, when the flange elements are fixed to each other and the pipe unit is accordingly connected with the connecting pipe, to allow movement between the pipe-shaped body and the connecting pipe via the sealing element's flexibility. A mutual fixation of said flange element forms the only touching connection of the pipe unit to said connecting pipe.

The invention relates to an SCR line for treatment of exhaust from an internal combustion engine and including a first hose to carry a reducing agent, a second hose to carry a tempering agent and a pipe enclosing the two hoses. The two hoses are arranged in the pipe so as to run side by side in parallel. Each of the same-side ends of the first hose and of the pipe are connected to a reducing agent coupling housing. The ends of the second hose are each connected to a tempering agent coupling part separate from the reducing agent coupling housing. At least one of the reducing agent coupling housings has a through-opening at the outer perimeter. The second hose runs from the interior of the pipe through the through-opening to the outside. Furthermore, the invention relates to an SCR line bundle with an SCR line.

An exhaust structure for an internal combustion engine has an exhaust pipe having an inner pipe through which exhaust gas of the internal combustion engine circulates, and an outer pipe covering an outer periphery of the inner pipe, and in the exhaust pipe, an inner radiation layer provided on an outer surface of the inner pipe and having a higher emissivity than the inner pipe, an outer radiation layer provided on an inner surface of the outer pipe and having a higher emissivity than the outer pipe, and an intermediate layer proposed between the inner radiation layer and the outer radiation layer, configured to pass infrared radiation therethrough, and having a lower coefficient of thermal conductivity than the inner pipe and the outer pipe are provided.

A connection piece assembly unit, especially for an exhaust gas treatment device of an exhaust system of an internal combustion engine, includes a connection piece (30) with a base area (32) for fixing the connection piece (30) to a carrier assembly unit. A covering element (40) projects over an outside (42) of the connection piece (30).

A heat shield arrangement (14) for shielding the environment surrounding the junction between two sections (10, 13) of insulated vehicle exhaust from heat emanating from uninsulated end portions of the junction of the exhaust sections. The heat shield (14) is of tubular form and mounted on the insulation surrounding one section (10) of the exhaust and is slidingly movable between a first position (14) in which the junction between the two sections is exposed to allow access to work on fastening means (15) for holding the two sections together and a second position (14) in which the shield surrounds the junction and overlaps the ends of the insulation on both sections of the exhaust to insulate the surrounding environment.

A muffler is disclosed. The muffler may comprise an expansion chamber and a double shell housing surrounding the expansion chamber and extending from a first end to a second end. The double shell housing may include an annular perforated inner shell, an annular outer shell surrounding the inner shell, and an insulation between the inner shell and the outer shell. The muffler may further comprise at least one C-bracket between the inner shell and the outer shell at each of the first and second ends of the double shell housing. Each of the C-brackets may include a first leg, a second leg, and a linking portion connecting the first leg and the second leg. The second leg may be in abutting engagement with the outer shell.

A method of manufacturing an exhaust gas carrying device, in particular an exhaust gas purification device, and a tool provided therefor include segment-like jaws that are used to deforma an outer housing. The jaws have indentations or projections adjacent to each other, and which are complementary to form a continuously surrounding indentation/projection. The reshaped outer housing is provided with one or more surrounding projections or indentations by the deformation.

A pipe unit for arrangement in a conduit for a gaseous medium, comprising a pipe-shaped body, a pipe-shaped flexible sealing element, which is fixedly attached at a first end outside the pipe-shaped body and which comprises a flange element at a second end. The flange element is detachably attachable to a flange element in a connecting pipe in the conduit, in order to, when the flange elements are fixed to each other and the pipe unit is accordingly connected with the connecting pipe, to allow movement between the pipe-shaped body and the connecting pipe via the sealing element's flexibility. A mutual fixation of said flange element forms the only touching connection of the pipe unit to said connecting pipe.