EXHAUST PURIFICATION DEVICE

摘要

The invention relates to an exhaust-gas treatment device (10), comprising a) an outer tube (14) through which an exhaust-gas stream (12) can flow, b) an inner tube (20) that is arranged in a first section (16) of the outer tube (14) and that divides the interior of the first section (16) into a central flow path (22) and a peripheral flow path (24), whereby a first exhaust-gas treatment means (26) is arranged in the central flow path (22) and/or in the peripheral flow path (24), c) means (30, 32) to selectively convey an exhaust-gas stream via the central flow path (22) and/or via the peripheral flow path (24), and d) a second exhaust-gas treatment means arranged in a second section (18) of the outer tube (14) downstream from the first section (16). Flow means (36, 38, 40) are provided that are designed to equalize a flow impinging upon the second exhaust-gas treatment means (28) when the exhaust gas is conveyed via the central flow path (28) as well as when the exhaust gas is conveyed via the peripheral flow path (24).

主权项

1. An exhaust-gas treatment device, comprising
a) an outer tube through which an exhaust-gas stream can flow; b) an inner tube that is arranged in a first section of the outer tube and that divides the interior of the first section into a central flow path and a peripheral flow path, whereby a first exhaust-gas treatment means is arranged in the central flow path and/or in the peripheral flow path; c) means to selectively convey an exhaust-gas stream via the central flow path and/or via the peripheral flow path; and d) a second exhaust-gas treatment means arranged in a second section of the outer tube downstream from the first section; characterized by e) flow means that are designed to equalize a flow impinging upon the second exhaust-gas treatment means when the exhaust gas is conveyed via the central flow path as well as when the exhaust gas is conveyed via the peripheral flow path.