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Waste discharge controlling system for engine

一种废气排放、控制系统的技术，应用在发动机元件、燃烧发动机、机器/发动机等方向，能够解决还原反应不提前、很难充分地转化NOx等问题

Inactive Publication Date: 2007-01-24
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the state with a large amount of oxygen, the reduction reaction of NOx in the exhaust gas does not advance
Therefore, in the prior art, the external air is directly introduced into the exhaust gas entering the exhaust muffler from the engine, and it is difficult to fully convert NOx

Method used

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  • Waste discharge controlling system for engine
  • Waste discharge controlling system for engine
  • Waste discharge controlling system for engine

Examples

Experimental program
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Effect test

Embodiment Construction

[0013] The invention is described below by referring to the preferred embodiment of Figs. 1-4. Referring first to Fig. 1, the general-purpose engine is an air-cooled single-cylinder engine used in, for example, a working machine or the like, and it has an engine block 21 comprising: a crankcase 22; a cylinder body (block) 23, which is slightly upwardly inclined and protrudes from one side of the crankcase 22; and a cylinder head 24 which is joined to the head of the cylinder block 23. A large number of air-cooling fins (fins) 23 a and 24 a are provided on the outer surfaces of the cylinder block 23 and the cylinder head 24 . The crankcase 22 is mounted via its lower mounting plane 22a to the cylinder head of any working machine.

[0014] A cylinder bore 26 is provided in the cylinder block 23, and a piston 25 is slidably accommodated therein. A combustion chamber 27 is formed between the cylinder block 23 and the cylinder head 24 such that the top surface of the piston 25 fa...

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PUM

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Abstract

In an exhaust emission control system for an engine, comprising an exhaust emission control catalyst disposed in an exhaust muffler whose inside is divided into a plurality of chambers, at least a portion of the inside of the exhaust muffler is divided into a first chamber for converting mainly NOx in exhaust gas and a second chamber for converting HC and CO in the exhaust gas. The exhaust muffler comprises: a partition wall having a conduit for guiding the exhaust gas from the first chamber to the second chamber; an exhaust gas inlet for introducing the exhaust gas into the first chamber; an external-air suction means for sucking external air into the second chamber; and a discharge pipe for discharging the external air and the exhaust gas flowing through the second chamber.

Description

technical field [0001] The present invention relates to an exhaust emission control system for an engine, comprising an exhaust emission control catalyst provided in an emission muffler whose interior is divided into a plurality of chambers. Background technique [0002] An exhaust emission control system including an emission control catalyst provided in an emission muffler whose interior is divided into a plurality of chambers is known. For example, it is disclosed in Japanese Patent Application Laid-Open No. Hei 11-303623. [0003] Components to be converted in the exhaust gas from the engine include NOx, HC and CO, and the exhaust emission control catalyst promotes the reduction reaction of NOx and the oxidation reaction of HC and CO. A known exhaust emission control system, such as that disclosed in Japanese Patent Application Laid-Open No. Hei 9-273419, is configured to introduce external air into the exhaust muffler to compensate for the lack of oxygen in the exhaust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/28F01N3/34F01N1/00B01D53/94F01N1/08F01N3/24F01N3/30
CPCF01N2510/06F01N2470/18F01N1/089F01N3/30F01N2270/04F01N3/2885F01N2570/12F01N3/28F01N2230/04F01N2570/10F01N2570/14Y02T10/20Y02A50/20Y02T10/12
Inventor 千叶省作笠井聪人
Owner HONDA MOTOR CO LTD