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Exhaust gas purification device for internal combustion engine

A technology of exhaust purification device and internal combustion engine, which can be applied to exhaust devices, internal combustion piston engines, mufflers and other directions, and can solve problems such as reduction in commodity value.

Inactive Publication Date: 2013-11-20
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sulfuric acid has a low boiling point and can be visualized immediately as misty white smoke. Therefore, if it is released into the atmosphere in this state, the commercial value of the vehicle will decrease as a vehicle that emits white smoke.

Method used

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  • Exhaust gas purification device for internal combustion engine
  • Exhaust gas purification device for internal combustion engine
  • Exhaust gas purification device for internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0026] figure 1 It is a schematic diagram showing the exhaust purification device of an internal combustion engine of the present invention, and the internal combustion engine is, for example, a diesel engine. In the figure, 1 is a particulate filter for trapping particulates (exhaust particulates) contained in exhaust gas. 2 is an oxidation catalyst device disposed immediately upstream of the particulate filter 1 , and 3 is a catalyst device disposed downstream of the particulate filter 1 .

[0027] The particulate filter 1 is of a wall flow type having a honeycomb structure formed of a porous material such as cordierite, and has a plurality of axial spaces subdivided by a plurality of partition walls extending in the axial direction. Of the two adjacent spaces in the axial direction, one is closed by the plug on the exhaust downstream side, and the other is closed on the exhaust upstream side. In this way, one of the two adjacent spaces in the axial direction becomes an ex...

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Abstract

This exhaust gas purification device for an internal combustion engine is provided with a particulate filter disposed in an engine exhaust system, and a catalytic device disposed downstream of the particulate filter in the engine exhaust system. The catalytic device holds sulfuric acid as a sulfate and releases the product as SO2.

Description

technical field [0001] The present invention relates to an exhaust purification device for an internal combustion engine. Background technique [0002] In order to suppress the release of particles contained in the exhaust gas to the atmosphere, a particle filter for trapping particles is arranged in the exhaust system of the internal combustion engine. The particulates trapped by the particulate filter increase the exhaust resistance of the particulate filter. Therefore, regeneration processing is required to burn the trapped particulates until the exhaust resistance of the particulate filter increases above a set value. [0003] The regeneration process of the particulate filter is to supply additional fuel to the exhaust gas, burn the additional fuel in the particulate filter or in the oxidation catalytic device directly upstream of the particulate filter, and use the combustion heat to raise the temperature of the particulate filter to about 600°C as the combustion temp...

Claims

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Application Information

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IPC IPC(8): F01N3/08F01N3/10
CPCF01N3/0807F01N13/02F01N3/033F01N3/106F01N3/085Y02T10/20F01N13/009Y02T10/12
Inventor 菅原康中山茂树祖父江优一西冈宽真今井大地
Owner TOYOTA JIDOSHA KK