A method for regeneration of NOx storage catalytic converter of exhaust aftertreatment device

A catalytic converter and exhaust aftertreatment technology, which is applied to the electronic control of exhaust treatment devices, exhaust devices, exhaust treatment, etc. Effects of improved exhaust mass flow and improved fuel consumption

Pending Publication Date: 2020-09-15
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this is negative with regard to CO2 emissions and risks of oil dilution

Method used

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  • A method for regeneration of NOx storage catalytic converter of exhaust aftertreatment device
  • A method for regeneration of NOx storage catalytic converter of exhaust aftertreatment device
  • A method for regeneration of NOx storage catalytic converter of exhaust aftertreatment device

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Embodiment Construction

[0034] figure 1 The engine arrangement 1 shown schematically in FIG. 2 comprises an internal combustion engine 2 , an exhaust gas aftertreatment device 5 , a high-pressure exhaust gas recirculation device 6 and a low-pressure exhaust gas recirculation device 7 . Furthermore, the engine arrangement 1 contains a turbocharger 9 driven by means of an electric motor 8 . The electric motor 8 can also be designed as a generator at the same time. The turbocharger 9 includes a compressor 11 and a turbine 12 .

[0035] The exhaust aftertreatment device 5 comprises a NOx storage catalytic converter 13 and a particulate filter, which is arranged downstream of the NOx storage catalytic converter 13 , with an optional SCR coating 14 . The NOx storage catalytic converter 13 includes an inlet 16 and an outlet 17 . A device 19 for vaporizing fuel or injecting fuel into a flow channel 18 leading to the NOx storage catalytic converter 13 is arranged directly upstream of the inlet 16 of the NO...

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PUM

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Abstract

A method for regeneration of a NOx storage catalytic converter of an exhaust aftertreatment device of an internal combustion engine arrangement, the method comprising the steps of: detecting a shutdown of an internal combustion engine; determining a load of the NOx storage catalytic converter; determining a current operating temperature of the exhaust aftertreatment device; if the determined loadexceeds a fixed threshold and the determined current operating temperature exceeds a fixed threshold, regenerating the NOx storage catalytic converter after closure of the internal combustion engine,the exhaust valve is closed and the exhaust gas is directed through the low pressure exhaust gas recirculation flow passage, fresh air and exhaust gas recirculated via the low-pressure exhaust gas recirculation flow channel are conducted to the NOx storage catalytic converter via the high-pressure exhaust gas recirculation flow channel by means of an electrically driven supercharger and are simultaneously heated, and mixing a mixture of fresh air and recirculated exhaust gas with the vaporized fuel upstream of the NOx storage catalytic converter to form a rich air-fuel mixture.

Description

technical field [0001] The invention relates to a method for regeneration of a NOx storage catalytic converter of an exhaust gas aftertreatment device. The invention further relates to a control device for regeneration of a NOx storage catalytic converter, an exhaust aftertreatment device, an engine arrangement, a motor vehicle and a computer program product. Background technique [0002] After the combustion gases have left the burners or combustion chambers of the internal combustion engine driving the motor vehicle, they are cleaned by mechanical, catalytic or chemical means using exhaust aftertreatment devices, enabling compliance with the statutory pollutant limits. [0003] Against the background of increasingly stricter legal requirements for motor vehicle emissions, a widespread demand for exhaust gas aftertreatment has thus arisen. In particular, emissions from cold starts of diesel engines pose challenges in complying with future exhaust emission standards. A NOx...

Claims

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Application Information

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IPC IPC(8): F01N9/00F01N3/20
CPCF01N9/00F01N3/2066F01N3/208F01N3/2006F01N3/2013F01N2570/14F01N2610/02F01N3/0871F01N2240/36F01N2900/1614F01N2900/1602F01N3/0842F01N2430/06F01N2610/03F01N2560/026F02B37/168F02M26/06F02M26/35Y02T10/12Y02T10/40F01N3/0233F01N3/0296F01N3/0235F01N3/306F01N3/0253
Inventor J·克默林C·波尔恩森F·文德利希M·福斯汀H·M·金德尔H·弗里德里希斯V·斯米利亚诺夫斯基A·库斯克F·A·萨默候夫
Owner FORD GLOBAL TECH LLC
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