Tenneco Gmbh

Klaus Schröer

Eric A Hein

Attila Kovacs

Yannick Leske

Michael Flockert

Rafal Wrobel

The invention relates to a mixer for an exhaust gas system for mixing an additive into an exhaust gas flow of an internal combustion engine, having a first shell and at least a second shell which are arranged successively in the circumferential direction in relation to a center axis, each shell having at least two shell edges that are arranged offset in the circumferential direction and which each form a flow edge, wherein the flow edges of two circumferentially adjacent shell edges of two different shells delimit an inflow opening, such that at least one pipe end arranged coaxially with the center axis is provided with a circumferential pipe profile that has a nominal radius Rn and is used for connection to an exhaust pipe, the pipe end being formed by the circumferentially adjacent shells.

Mixing tube

A shell muffler for an internal combustion engine that is formed of a first shell and at least one second shell, which shells are connected at their respective edge regions Bso as to form the shell muffler, each edge region Bhaving a box-like inner contour K, which has four corner regions (E)-(E) and a width (B) and a length (L), and an outer contour K, and each shell being produced from a shell blank R, which is formed by deforming a sheet metal strip using a deep drawing tool having the shape of the shell, the blank R, after deforming, having an edge region Bwith an outer contour K, said edge region being removed at least partially after the blank R has been cut to size so as to form the outer contour Kof the edge region Bof the shell. In addition to the box-like basic shape G, the inner contour Kof the edge region Bof the shell has at least one corner region (E-E) which is expanded beyond the width B and the length L of the box-like basic shape (G) and is thus adapted at least partially to the contour Kof the edge region Bto be cut of the blank R.

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Landau, Germany

Klaus Schröer