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Method and device for aftertreatment of exhaust gases of internal combustion engines

一种废气后处理、内燃机的技术，应用在排气处理装置的电控、排气处理装置的诊断装置、排气装置等方向，能够解决未充分地考虑催化器转化性能等问题，达到提高寿命、有效废气后处理、小排放的效果

Active Publication Date: 2021-09-21
VOLKSWAGEN AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the known method has the disadvantage that it does not sufficiently take into account the temperature-dependent conversion behavior of the catalytic converter and thus produces only a suboptimal exhaust gas aftertreatment, especially in the initial phase or after an operating phase in which the exhaust system is cooled.

Method used

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  • Method and device for aftertreatment of exhaust gases of internal combustion engines
  • Method and device for aftertreatment of exhaust gases of internal combustion engines

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Embodiment Construction

[0030] figure 1 An internal combustion engine 10 is shown, which is designed as a gasoline engine with external ignition by means of spark plugs 18 . Internal combustion engine 10 has an intake port 12 , a plurality of combustion chambers 14 and an exhaust port 16 . An exhaust port 16 of internal combustion engine 10 is connected to an exhaust system 20 . The internal combustion engine 10 is preferably designed as an internal combustion engine 10 supercharged by means of an exhaust gas turbocharger 22 . For this purpose, the exhaust gas turbocharger 22 has a turbine 26 arranged in the exhaust gas duct 38 of the exhaust system 20 , which drives a compressor 26 in the not shown air supply system of the internal combustion engine 10 and thus improves the combustion chamber 14 inflation status. In the exhaust gas channel 38, along the flow direction of the exhaust gas through the exhaust gas channel 38, a first three-way catalytic converter 30 is arranged downstream of the turb...

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Abstract

The invention relates to a method for aftertreatment of exhaust gases of an internal combustion engine (10). An exhaust device (20) is provided for aftertreatment of the exhaust gas of the internal combustion engine (10), in which a first A three-way catalytic converter (30) and at least one further three-way catalytic converter (34, 36) is arranged downstream of the first three-way catalytic converter (30). At least one lambda sensor (40, 42, 44) is arranged upstream of the respective three-way catalytic converter (30, 34, 36) in the exhaust gas channel (38) of the exhaust system. In the proposed method, the component temperature (T K1 , T K2 ) and the component temperature (T K1 , T K2 ) and light-off temperature (T LOK1 , T LOK2 )Compare. Here, the lambda regulation of the internal combustion engine (10) has reached the light-off temperature (T LOK1 , T LOK2 ) with a lambda sensor (40, 42, 44) upstream of the last three-way catalytic converter (30, 34, 36). Furthermore, according to the invention an exhaust gas aftertreatment system is proposed for carrying out such a method.

Description

technical field [0001] The invention relates to a method for exhaust gas aftertreatment of an internal combustion engine and an exhaust gas aftertreatment system for carrying out such a method. Background technique [0002] Future emission regulations place high demands on the raw engine emissions and the exhaust gas aftertreatment of internal combustion engines. With the introduction of Euro 6d-Temp emission regulations, motor vehicles must comply with emission limits in actual operation (actual driving emissions). The use of multi-stage exhaust gas aftertreatment concepts in the field of Otto engines poses problems for the new emission regulations with regard to the adjustability of the various exhaust gas aftertreatment components as well as the control quality and operational readiness of the exhaust gas aftertreatment components. This shows that lambda regulation schemes with rigidly designed regulation systems only provide suboptimal emission results. [0003] DE 10 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N9/00F01N3/10F01N11/00F01N3/021F01N3/035F01N3/30F01N3/05
CPCF01N9/00F01N9/002F01N3/101F01N11/002F01N3/021F01N3/035F01N3/30F01N3/05F01N3/0222F01N3/0231F01N3/0835F01N3/22F01N9/005F01N11/007F01N13/009F01N13/0093F01N2250/02F01N2550/02F01N2550/14F01N2560/025F01N2560/06F01N2560/14F01N2900/0416F01N2900/1404F01N2900/1602F01N2900/1626F02D41/029F02D41/1441F02D41/1454F02D41/1456F02D2200/0802F02D41/1477F02D41/1488Y02T10/12Y02T10/40B01D53/9454B01D53/9495B01D2279/30F01N3/023F01N2430/06F01N2900/1402B01D46/84
Inventor C.尼
Owner VOLKSWAGEN AG
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