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Exhaust treatment system for internal combustion engine

An internal combustion engine and exhaust system technology, which is applied in exhaust treatment, combustion engine, engine components, etc., can solve the problems of inefficient exhaust flow of the carrier, unbalanced exhaust, and reduced conversion efficiency of exhaust treatment devices.

Active Publication Date: 2012-09-19
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, once reaching the inlet face of the catalyst carrier of the close-coupled catalytic converter, the distribution of exhaust gas on the inlet face may be concentrated towards the outer circumference, resulting in an inefficient flow of exhaust gas through the carrier
This uneven flow of exhaust gas through the carrier can reduce the conversion efficiency of the exhaust gas treatment device

Method used

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  • Exhaust treatment system for internal combustion engine
  • Exhaust treatment system for internal combustion engine
  • Exhaust treatment system for internal combustion engine

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Embodiment Construction

[0036] The following description is merely exemplary in nature and is not intended to limit the invention, its application or uses. It should be understood that throughout the drawings, like reference numerals indicate similar or identical parts and features.

[0037] refer to figure 1 , in an exemplary embodiment, a portion of an exhaust system 10 of an internal combustion engine (not shown) includes an exhaust-driven turbocharger 12 and a close-coupled exhaust treatment device 14 . The exhaust-driven turbocharger utilizes excess energy in the exhaust gas from the internal combustion engine to drive a compressor (not shown) for the purpose of compressing the intake air charge delivered during engine operation into the engine's intake system (not shown). As exhaust gas 16 expands through turbine volute 20 and toward turbocharger outlet 22 , it spins a turbine wheel (not shown). The turbocharger outlet 22 may include a flange portion 24 integrally formed with a turbocharger ...

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Abstract

An exhaust system comprises an exhaust driven turbocharger having an outlet and a flanged portion that extends about the outlet, an exhaust treatment device comprising a canister having an inlet cone that includes an integral inlet flange defining an the inlet opening configured to define a seal with the flanged portion that extends about the outlet of the turbocharger and a substrate disposed within the canister through which the exhaust gas flows. An exhaust gas passage, fluidly couples the turbocharger and the exhaust treatment device and allows for the passage of exhaust gas therebetween and a flow modifier comprising a radially inwardly extending wall portion extends from an inner wall of the exhaust gas passage and directs the exhaust gas away from an outer radius of the exhaust gas passage to evenly distribute the exhaust gas across the an inlet face of the substrate.

Description

[0001] Cross References to Related Applications [0002] This patent application claims priority to US Provisional Patent Application Serial No. 61 / 453,346, filed March 16, 2011, which is hereby incorporated by reference in its entirety. technical field [0003] Exemplary embodiments of the present invention relate to exhaust gas treatment systems for internal combustion engines, and more particularly, to an exhaust system having consistent flow at different engine speeds. Background technique [0004] A conventional internal combustion engine exhaust aftertreatment system may have a catalytic treatment device disposed near the exhaust manifold of the internal combustion engine. The catalytic treatment device, called a close-coupled (close-coupled) catalytic converter, minimizes exhaust heat loss between the engine and the device, resulting in higher temperatures and faster catalytic reaction because catalyst compounds typically used to treat engine exhaust operate best at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/00F01N3/20
CPCF01N3/2892F01N2240/20F02B37/00F01N13/1805
Inventor K·奥凯恩C·王G·克拉克二世
Owner GM GLOBAL TECH OPERATIONS LLC