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Emission control system

An emission control system and exhaust pipe technology, applied in exhaust devices, mechanical equipment, engine components, etc., can solve problems such as difficult mixing of fuel and exhaust gas, difficulty in uniform supply of atomized fuel, difficulty in ensuring fuel spray stroke, etc.

Inactive Publication Date: 2011-11-16
MITSUBISHI MOTORS CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, even with this proposed emission control system, limitations similar to the assembly of fuel injection valves and catalysts described above are still the case where fuel spray strokes where fuel is mixed with exhaust gas are difficult to secure
[0011] Thus, in an emission control system, it is still difficult to adequately mix the injected fuel with the exhaust gas
This has caused a problem that it is difficult to uniformly supply the atomized fuel to the catalyst, and thus the catalyst cannot perform its function

Method used

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  • Emission control system
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Embodiment Construction

[0039] In the following, with Figures 1 to 3 The first exemplary embodiment shown serves as a basis for explaining the invention.

[0040] figure 1 Shows the exhaust system of an internal combustion engine, such as a diesel engine. exist figure 1 In, reference numeral 1 denotes the engine main body of the diesel engine, 1a denotes the exhaust manifold (only part thereof is shown) of the engine main body 1 of the diesel engine, and 2 denotes a supercharger connected to the outlet of the exhaust manifold 1a, or In this embodiment a turbocharger.

[0041] The emission control system 3 is arranged at the exhaust port of the turbocharger 2 . In which a NOx removal system 3a for adsorbing NOx (nitrogen oxides) contained in exhaust gas and periodically reducing and removing the adsorbed NOx and a PM (particulate matter) trapping system 3b for trapping PM are combined together The system is used for emission control system 3.

[0042] For example, the configuration used for the...

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Abstract

An emission control system, includes: an exhaust pipe portion, adapted to guide exhaust gas from an engine to outside; a catalyst, accommodated in the exhaust pipe portion; an additive injection valve, provided at the exhaust pipe portion; located at upstream side of the catalyst, and configured to inject additives to be supplied to the catalyst toward a flow of the exhaust gas in the exhaust pipe portion. The exhaust pipe portion has a flow path section located at upstream side of the catalyst, which intersects an injection flow of the additives injected by the additive injection valve, and the flow path section is made to have substantially the same shape as an injection region of the injection flow which confronts the exhaust gas.

Description

technical field [0001] The present invention relates to an emission control system. Background technique [0002] In order to purify exhaust emissions from automobiles (vehicles) having diesel engines, an emission control system in which an adsorption-type NOx catalyst, a selective reduction-type NOx catalyst and a diesel particulate filter are combined is used to prevent NOx (nitrogen oxides) and PM (particulate matter) are emitted from diesel engines into the atmosphere. [0003] Such an emission control system adopts a structure in which a catalyst called a pre-stage catalyst, such as an oxidation catalyst, a NOx trap catalyst, or a selective reduction NOx catalyst, is provided inside the exhaust pipe portion, and the exhaust pipe portion Exhaust gas exhausted from the engine is discharged outside it, and a fuel injection valve (such as for adding a reducing agent) that injects fuel required for the reaction of the catalyst to the upstream side of a catalyst such as an o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/08F01N3/24B01D53/88
Inventor 小岛光高木村洋之冈田公二郎信原惠畠道博川岛一仁古贺一雄前原和人石井肇
Owner MITSUBISHI MOTORS CORP