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Exhaust gas after-treatment system and method for exhaust gas after-treatment of combustion engine

A technology for post-treatment of exhaust gas and combustion engine, which is applied in the direction of combustion engine, internal combustion piston engine, and electronic control of exhaust treatment device, etc. The effect of small heat loads

Active Publication Date: 2021-02-02
VOLKSWAGEN AG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the position close to the engine leads to accelerated aging of the catalytic surfaces of the catalyst during high-load operation

Method used

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  • Exhaust gas after-treatment system and method for exhaust gas after-treatment of combustion engine
  • Exhaust gas after-treatment system and method for exhaust gas after-treatment of combustion engine
  • Exhaust gas after-treatment system and method for exhaust gas after-treatment of combustion engine

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Embodiment Construction

[0038] figure 1 A schematic diagram of a combustion engine 10 is shown, the exhaust port 18 of which is connected to an exhaust system 20 of an exhaust gas aftertreatment system according to the invention for exhaust gas aftertreatment of the exhaust gas flow of combustion engine 10 . Combustion engine 10 is designed as an Otto engine, which is ignited externally by means of an external ignition, in particular by means of spark plugs 16 . The combustion engine 10 has a plurality of combustion chambers 12 in which a fuel-air mixture is combusted. For this purpose, fuel injectors 14 for injecting fuel into the combustion chambers 12 are respectively arranged on the combustion chambers 12 . The combustion engine 10 is preferably designed as a combustion engine 10 supercharged by means of an exhaust gas turbocharger 24, wherein the turbine 26 of the exhaust gas turbocharger 24 is arranged downstream of the exhaust port 18 and close to the three-way catalytic converter 28 of the e...

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Abstract

The invention relates to an exhaust gas after-treatment system for a combustion engine (10). The exhaust gas after-treatment system of the present invention is provided with an exhaust device (20) that can be connected to an exhaust port (18) of the combustion engine (10). A three-way catalyst (28) close to the engine is arranged in the flow direction of exhaust gas of the combustion engine (10) through an exhaust passage (22) of the exhaust device (20), and a second catalyst and a particle reduction device are arranged downstream of the three-way catalyst (28) close to the engine. A fuel injector is arranged on the exhaust gas duct (22), by means of which fuel can be injected downstream of a three-way catalyst (28) close to the engine and upstream of a second catalyst, and the exhaust device (20) comprises a secondary air system through which secondary air can be blown into the exhaust passage (22) downstream of a three-way catalyst (28) near the engine and upstream of a second catalyst. The invention also relates to a method for the exhaust gas after-treatment of the combustion engine (10) having the exhaust gas after-treatment system.

Description

technical field [0001] The invention relates to an exhaust gas aftertreatment system and a method for exhaust gas aftertreatment of a combustion engine having such an exhaust gas aftertreatment system according to the preambles of the independent claims. Background technique [0002] Increasingly stringent emission regulations place high demands on vehicle manufacturers, which are met by corresponding measures for reducing raw engine emissions and corresponding exhaust gas aftertreatment. With the introduction of the EU6 emission standard, a limit value for the number of particles was set for petrol engines, which required the use of a petrol particulate filter in many cases. Such soot particles are formed especially after a cold start of a combustion engine due to incomplete combustion combined with a sub-stoichiometric combustion air ratio (or combustion excess air ratio) and cold cylinder walls during cold start. The cold start phase is therefore crucial for compliance w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/36F01N3/32F01N3/035F01N9/00F01N13/00F02P5/15F01N3/20
CPCF01N3/36F01N3/32F01N3/035F01N9/002F01N13/009F01N13/008F02P5/1502F01N3/2033F01N9/00F01N3/101F01N13/0093F01N3/025F01N3/029F01N3/22F01N3/30F01N2250/04F01N2270/04F01N2340/02F01N2430/06F01N2430/00F01N2560/025F01N2560/14F01N2610/03F01N2610/146F01N2900/1626F01N2900/1602F01N2900/08F01N2900/1804F01N2900/1402Y02T10/12F01N3/0253F01N2250/02F01N2390/02
Inventor M.卡克S.鲍克纳F-C.B.冯塞默恩-林登斯特捷纳
Owner VOLKSWAGEN AG
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