Exhaust gas after-treatment arrangement and method for operating such an arrangement
a technology of exhaust gas aftertreatment and exhaust gas flow, which is applied in the direction of engines, mechanical equipment, machines/engines, etc., can solve the problems of high backpressure at high exhaust gas flow, unwanted reduction of engine power, and the inability of the catalytic converter to dimension for the maximum occurring exhaust gas flow, etc., and achieve the effect of increasing or reducing the cross section of the central channel
Inactive Publication Date: 2018-12-27
CONTINENTAL AUTOMOTIVE GMBH
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Benefits of technology
The invention provides an exhaust gas treatment system and a way to operate it that can handle both high and low gas flows without affecting the engine's power or fuel consumption.
Problems solved by technology
To avoid inadequate heating of the catalytic converter at low exhaust gas flows, which has a disadvantageous effect on the catalytic reaction, the catalytic converter cannot be dimensioned for the maximum occurring exhaust gas flows.
This, in turn, has the disadvantage that a high backpressure arises at high exhaust gas flows.
A higher backpressure leads to an unwanted reduction in engine power and to higher fuel consumption.
Method used
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Embodiment Construction
[0033]FIG. 1 shows a section of an exhaust line 1 in which a catalytic converter acting as an exhaust gas after-treatment device 2 is arranged. Another exhaust gas after-treatment device 3, which is likewise configured as a catalytic converter, is arranged downstream of catalytic converter 2. Catalytic converter 2 has a casing 4, which surrounds a honeycomb body 5. The honeycomb body 5 is formed by a plurality of sheet metal layers, which form a catalyst matrix 6 and is a flow surface for the exhaust gas, wherein a catalytic reaction takes place in the exhaust gas as it flows through the catalyst matrix 6. Along its longitudinal axis, the honeycomb body 5 has a central channel 7, through which exhaust gas can flow, bypassing the catalyst matrix 6. The main flow direction of the exhaust gas is indicated by an arrow. Situated at the inlet 8 of the channel 7 is a movable element 9, which blocks the inlet 8 in the illustration shown. The movable element is a flap 9, which is secured on ...
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Exhaust gas after-treatment arrangement and method for operating an exhaust gas after-treatment arrangementThe invention relates to an exhaust gas after-treatment arrangement having an exhaust line 1 and at least one exhaust gas after-treatment device 2, which has a honeycomb body 5 forming a flow surface for the exhaust gas. The honeycomb body 5 is a hollow cylinder having a central channel 7, wherein the one movable element 9, 15 is arranged in such a way that the movable element can be moved between two end positions, wherein in the first end position a larger cross section of the channel 7 is exposed than in the second end position.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This is a U.S. national stage of application No. PCT / EP2016 / 081582 filed on 16 Dec. 2016, which claims priority to the Germany Application Nos. 10 2015 226 110.7 filed 18 Dec. 2015; and 10 2016 225 279.8 filed 16 Dec. 2016, and the content of all incorporated, herein fey reference.BACKGROUND OF THE INVENTION1. Field of the Invention[0002]The invention relates to an exhaust gas after-treatment arrangement (i.e., assembly) and to a method for operating an exhaust gas after-treatment arrangement, having an exhaust line and at least one exhaust gas after-treatment device, which has a honeycomb body forming a flow surface for the exhaust gas.2. Related Art[0003]Exhaust gas after-treatment devices of this kind having a honeycomb body are known as catalytic converters for exhaust gas after-treatment. In general, the catalytic converter has a casing, which, on the one hand, surrounds the honeycomb body and, on the other hand, is connected to the ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F01N3/022F01N3/20F01N3/28
CPCF01N3/0222F01N3/2053F01N3/2828F01N3/2892F01N2240/36F01N2410/02F01N2410/10Y02T10/12
InventorHOLZ, OSWALD
OwnerCONTINENTAL AUTOMOTIVE GMBH