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Internal combustion engine having an exhaust gas system

一种排气系统、内燃机的技术，应用在内燃活塞发动机、排气处理、装料系统等方向，能够解决未考虑废气温度额外有利的潜能等问题，达到提高全负荷适用性和使用寿命、减少装载量、流动阻力小的效果

Inactive Publication Date: 2012-09-05
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Drawbacks of this technology are e.g. one-sided optimization of HC / CO untreated emissions without consideration of the relative exhaust gas temperature and NO X potentially additional beneficial potential for emissions

Method used

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  • Internal combustion engine having an exhaust gas system
  • Internal combustion engine having an exhaust gas system

Examples

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Embodiment Construction

[0014] figure 1 A sectional view of a cylinder head of a SULEV internal combustion engine 1 with a section of an exhaust system 3 is shown, by means of which SULEV limit values ​​can be observed. The combustion chambers 2 of the cylinders are arranged in the cylinder head of the internal combustion engine 1 . When the internal combustion engine 1 is running, the exhaust gas flows from the combustion chamber 2 into the exhaust gas discharge passage 5 in the cylinder head of the internal combustion engine 1 . The direction of flow of exhaust gases is indicated by arrows. Then, the exhaust gas flows into the exhaust system 3 on which the secondary air blowing device 4 is arranged. By means of this secondary air blowing device 4, fresh air (secondary air) is blown into the exhaust line 3 at a secondary air blowing position 4' to start CO and HC thermal afterburning.

[0015] According to the invention, when the internal combustion engine 1 is running and the residual gas conten...

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Abstract

The invention relates to an internal combustion engine (1), comprising at least one combustion chamber (2) and an exhaust gas system (3) arranged on an exhaust gas outlet channel (5), the exhaust gas system having at least one secondary air injection device (4) for injecting secondary air into the exhaust gas system (3) between the combustion chamber (2) and an exhaust emission control system (5) arranged in the exhaust gas system (3), wherein during operation of the internal combustion engine (1), a residual gas content in the combustion chamber (2) can be changed, and a secondary air injection point (4') on the exhaust gas system (3) is arranged so far from the combustion chamber (2) that injected secondary air flows back into the exhaust gas outlet channel (5) due to backflowing exhaust gas in the exhaust gas system (3) but does not flow back into the combustion chamber (2). The embodiment according to the invention makes it possible to comply with SULEV emissions limits even for engines having many combustion chambers and / or exhaust gas turbochargers, for which a SULEV certification previously seemed impossible.

Description

technical field [0001] The invention relates to an internal combustion engine with an exhaust system having the features stated in the preamble of claim 1 . Background technique [0002] For example, in "Wikipedia", the free encyclopedia, the secondary air system is described as follows: In order to comply with the applicable exhaust emission standards and regulations, the secondary air system is used in gasoline engines (Ottomotor). The secondary air system mainly includes a secondary air pump and a secondary air valve. The system is used to oxidize the exhaust gas components HC (hydrocarbons) and CO (carbon monoxide) during the cold start phase. In addition, the system heats the catalytic converter to operating temperature very quickly. The engine control unit confirms the effectiveness of the catalytic converter via the air mass sensor (Lambdasonde) and then switches off the secondary air pump. In order to be able to comply with increasingly stringent exhaust emission ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/22F01N3/30F01N3/34F02D41/02F02D41/06F02M25/07F02D13/02
CPCF01N3/22F01N3/30F01N3/34F01N2430/10F02B37/00F02D13/0207F02D13/0261F02D41/0255F02D41/064F02D41/402F02M26/01Y10T29/49231Y02T10/12
Inventor M·米克劳奇施S·布彻尔S·巴伯尼茨J·贝克尔
Owner BAYERISCHE MOTOREN WERKE AG
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