Mixer element for fluid that is guided in pipe

Abstract

The invention relates to a mixer element (1) for a fluid that is guided in a pipe (2), especially a mixer element that is used in the exhaust pipe of an internal combustion engine. Parts of the outer current A that is adjacent to the inner surface (3) of the pipe (2) are guided towards the interior by means of an outer guide section (4) and at the same time and in an approximately common plane parts of the inner current I are guided towards the exterior by means of an inner guide section (5). The use of the entire inner surface (3) of the pipe (2) for the purpose of cooling is preferably guaranteed by at least one opening (7) that is provided in the outer guide surface (4). The invention provides a simple means for obtaining a homogeneous temperature distribution and good cooling of a fluid that is guided in a pipe. The inventive mixer element (1) is especially distinguished from known mixer elements by its compact construction.

Description

technical field [0001] The invention relates to a mixing element for a fluid guided in a duct and to a duct, in particular an exhaust pipe of a motor vehicle, in which at least one such mixing element is arranged. Background technique [0002] Hot fluid introduced into the pipe, for example exhaust gas from an internal combustion engine, is supplied to a device, such as a three-way catalytic converter or NOx storage, this fluid has at least one outboard flow, which is cooled by the outer surface of the pipe, so There is a non-uniform temperature distribution across the entire section of the airflow. [0003] In order to make the uneven temperature distribution more even, it is known to place mixing elements in the pipe, which, viewed in cross-section of the pipe, either strip the cooler outside flow from the inner surface of the pipe and divert it to the inside The "peeling" element (hereinafter also referred to as the outer guiding surface) or the diverting element (herein...

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