Particle filter for motor vehicle

Abstract

A particulate filter for a motor vehicle has a casing (2) that allows through flow. A core (4) is accommodated in the casing (2) and allows through flow. The casing (2) has a longitudinal axis (3). A through flow duct (9) is formed between the casing (2) and the core (4) to allow the through flow of exhaust gas from an internal combustion engine of the motor vehicle. A ring (7) is arranged in the through flow duct (9) and gives the through flow duct (9) a labyrinth-type configuration.

Description

technical field [0001] The invention relates to a particle filter for a motor vehicle according to the preamble of patent claim 1 . Background technique [0002] Particulate filters for motor vehicles are known. Originally, particulate filters were developed to reduce particulate or soot emissions from motor vehicles with diesel engines. Particulate or soot emissions depend on combustion processes in internal combustion engines or internal combustion engines, during which they are also used to reduce emissions from gasoline engines. [0003] Due to its location in the exhaust tract of the internal combustion engine, the particle filter influences the characteristic exhaust sound of the engine of the motor vehicle. Basically, they act as a low pass filter, where higher frequencies are filtered out. That is, the high frequencies of the exhaust noise are attenuated, thereby changing the original sound signature of the motor vehicle. Particle filters according to the prior a...

AI Technical Summary

Problems solved by technology

In the case of a particle filter according to the prior art as a low-pass filter, this means that it has a narrow frequency spectrum, since relatively high and high frequencies are filtered out and thus no longer audible

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