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Method and control unit for temperature control of exhaust aftertreatment device and arrangement for exhaust aftertreatment

A technology of exhaust after-treatment and control unit, which is applied in the direction of electronic control, exhaust device, exhaust treatment of exhaust treatment devices, etc., can solve the problem of not considering the requirements of multiple exhaust after-treatment devices, etc., and achieve miniaturization. Installation space, fast and accurate heating effect

Pending Publication Date: 2020-03-03
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the system disclosed in JP 2000 297 632 A does not take into account the requirements mentioned above regarding the arrangement of multiple exhaust aftertreatment devices

Method used

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  • Method and control unit for temperature control of exhaust aftertreatment device and arrangement for exhaust aftertreatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] figure 1 A schematic illustration of an arrangement 6 for exhaust aftertreatment in an exemplary embodiment is provided.

[0043] The arrangement 6 is attached to the internal combustion engine 2 . For example, the internal combustion engine 2 may be configured as a compression ignition / compression ignition engine and fueled with diesel. The internal combustion engine 2 produces exhaust gas which is diverted into the exhaust tract 1 .

[0044] There are two exhaust aftertreatment devices 3a, 3b that require temperature control and are arranged in the exhaust duct 1 . In the exemplary embodiment, the first exhaust after-treatment device 3a arranged close to the engine is an LNT catalytic converter or an oxidation catalytic converter. The second exhaust gas aftertreatment device 3b, which is arranged remotely from the engine, is an SCR catalytic converter. Other exhaust aftertreatment devices may be present, for example, figure 1 The particle filter 8 arranged betwee...

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Abstract

The invention relates to a method and a control unit for temperature control of an exhaust aftertreatment device and an arrangement for exhaust aftertreatment. The invention relates to a method for controlling the temperature of a plurality of exhaust gas after-treatment devices 3a, 3b arranged in an exhaust gas duct 1 of an internal combustion engine 2, wherein a thermoelectric device 4a, 4b is assigned to a number of exhaust gas after-treatment devices 3a, 3b in each case. The method comprises the steps of: cooling the exhaust gas aftertreatment device 3a, 3b by means of the assigned thermoelectric device 4a, 4b while generating electrical energy; and electrically heating the exhaust gas aftertreatment device 3a, 3b, wherein electrical energy generated during cooling is used for heating.The invention further relates to a control unit 5 for controlling the temperature of a plurality of exhaust gas aftertreatment devices 3a, 3b arranged in an exhaust gas duct 1 of an internal combustion engine 2, and to an arrangement 6 for exhaust gas aftertreatment.

Description

technical field [0001] The invention relates to a method and a control unit for temperature control of a plurality of exhaust gas aftertreatment devices arranged in an exhaust tract and an arrangement for exhaust gas aftertreatment. Background technique [0002] In order to reduce the emission of air pollutants and observe limit values ​​in this regard, exhaust gas aftertreatment devices (for example catalytic converters, particle filters, etc.) are usually arranged in the exhaust tract of the internal combustion engine. Frequently used catalytic converters include, for example, catalytic converters for selective catalytic reduction (SCR catalytic converters) and lean nitrogen oxide trapping catalytic converters (LNT catalytic converters). [0003] A common feature of most exhaust aftertreatment devices is that they facilitate proper exhaust aftertreatment only within a given temperature range between a minimum temperature (also called light-off temperature) and a maximum te...

Claims

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Application Information

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IPC IPC(8): F01N3/20F01N3/38F01N9/00
CPCF01N3/2013F01N3/38F01N9/00F01N9/002F01N2240/16F01N3/0234F01N3/0814F01N3/0842F01N3/2006F01N3/2066F01N5/025F01N13/009F01N13/0097F01N3/20Y02T10/12Y02T10/40
Inventor R·乌克罗派克M·巴莱诺维奇J·哈姆森F·D·斯迈特
Owner FORD GLOBAL TECH LLC