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Exhaust gas purifying apparatus for internal combustion engine

A technology of exhaust purification device and internal combustion engine, which is applied in the direction of exhaust device, exhaust treatment, noise reduction device, etc., and can solve the problem that the distance cannot be fully guaranteed.

Inactive Publication Date: 2007-10-10
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In an apparatus in which occlusion reduction type NOx catalysts (hereinafter simply referred to as NOx catalysts) as NOx absorbents and the like are arranged in parallel in the exhaust passage, the distance between each NOx catalyst and each injection nozzle for supplying the reducing agent cannot be sufficiently is ensured, and it is possible that the reducing agent is biasedly supplied to a part of each NOx catalyst

Method used

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  • Exhaust gas purifying apparatus for internal combustion engine
  • Exhaust gas purifying apparatus for internal combustion engine
  • Exhaust gas purifying apparatus for internal combustion engine

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Embodiment Construction

[0029] FIG. 1 shows the structure of an embodiment in which an exhaust purification apparatus according to the present invention is incorporated into a diesel engine (hereinafter, may be referred to as an engine) 1 as an internal combustion engine. An engine 1 is mounted on a vehicle as a power source, and cylinders 2 of the engine 1 are connected to an intake passage 3 and an exhaust passage 4 . In the intake passage 3, the compressor 5a of the turbocharger 5, the intercooler 6 for cooling the intake air, and the throttle valve 7 for adjusting the amount of intake air are provided; while in the exhaust passage 4, The turbine 5b of the turbocharger 5 is provided. The exhaust passage 4 is formed by an exhaust pipe 8 . The exhaust pipe 8 on the downstream side of the turbine 5b has branch pipes 10 branched from the same upstream pipe 9 (two branch pipes in FIG. 1 ). In each branch pipe 10, an addition injector 11, a pre-catalyst 12, a particulate filter (hereinafter simply refer...

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Abstract

An exhaust gas purifying apparatus for an internal combustion engine (1) comprises a casing (15) which forms a part of an exhaust passage (14) of the internal combustion engine and houses therein an occlusion-reduction type NOx catalyst (12, 13) and a reducing agent supply device (11) which supplies a reducing agent to an interior of the casing on an upstream side of the NOx catalyst. The reducing agent supply device injects the reducing agent in a flat form in a direction intersecting a center line (CL) of the NOx catalyst from a nozzle hole (11a) disposed in the casing.

Description

technical field [0001] The invention relates to an exhaust purification device of an internal combustion engine. Background technique [0002] There is known an exhaust gas purification device in which two particulate filters carrying a NOx absorbent are arranged in parallel in an exhaust pipe, and the NOx absorbent is depleted at a certain moment by reducing the amount of exhaust gas flowing into one of the NOx absorbents. A functional regeneration process of the NOx absorbent is performed (see Japanese Patent No. 2727906). As a prior art document related to the present invention, there is also Japanese Utility Model Application Publication No. 7-16014. [0003] In an apparatus in which occlusion reduction type NOx catalysts (hereinafter simply referred to as NOx catalysts) as NOx absorbents and the like are arranged in parallel in the exhaust passage, the distance between each NOx catalyst and each injection nozzle for supplying the reducing agent cannot be sufficiently ...

Claims

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Application Information

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IPC IPC(8): F01N3/20F01N3/08F01N3/36
CPCF01N3/0814F01N2610/03F01N2410/12F01N13/0097F01N2240/36F01N2013/026F01N2570/14F01N13/04F01N13/011F01N3/0842F01N3/0821Y02A50/20
Inventor 植田贵宣水田为俊苅田孝司小田富久新美国明
Owner TOYOTA JIDOSHA KK
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