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Exhaust purification device

An exhaust purification device and technology for exhaust devices, which are applied to exhaust devices, mufflers, catalyst carriers, etc., can solve the problems of complex structure and different lengths, and achieve the effect of improving purification performance, simple structure and simple structure.

Active Publication Date: 2018-06-15
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above exhaust purification device, the first catalyst carrier on the upstream side and the second catalyst carrier on the downstream side have different outer diameters, and the second catalyst carrier and the third catalyst carrier have the same outer diameter but different lengths. Three types of catalyst supports need to be prepared, and the structure becomes complicated

Method used

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Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0048] figure 1 It is a right side view of the motorcycle of the first embodiment of the present invention.

[0049] The two-wheeled motorcycle 1 is a straddle-type vehicle, and an engine 20 is arranged in the center of the front and rear of the body frame F. The front fork 10 supporting the front wheel 2 is supported on the front end of the body frame F in a steerable manner, and the rear wheel 3 is supported by the front fork 10. A swing arm 11 is provided on the rear side of the body frame F, and a seat 12 on which an occupant sits is provided above the body frame F. As shown in FIG. Most of the body frame F is covered with a body cover C made of resin.

[0050] The body frame F has: a head pipe (not shown) provided at the front end; a pair of left and right main frames 13 extending obliquely downward from the head pipe to the rear; To the central vehicle frame 14; From the top of the central vehicle frame 14 to the left and right pair of seat frames (not shown) extending...

no. 2 Embodiment approach

[0115] Below, refer to Figure 5 ~ Figure 7 A second embodiment to which the present invention is applied will be described. In this second embodiment, the same reference numerals are assigned to the same components as those in the above-mentioned first embodiment, and description thereof will be omitted.

[0116] In the above-mentioned first embodiment, the case where the catalyst storage pipe 45 is arranged below the engine 20 has been described. The implementation is different.

[0117] Figure 5 It is a right side view of the motorcycle 101 of the second embodiment.

[0118] The two-wheeled motorcycle 101 is a straddle type vehicle, and an engine 120 is arranged in the center of the front and back of the body frame 108. The front fork 110 supporting the front wheel 102 is supported on the front end of the body frame 108 in a steerable manner, and the rear wheel 103 is supported. The swing arm 111 is provided on the rear side of the body frame 108 , and the seat 112 on ...

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Abstract

An exhaust purification device capable of realizing high exhaust purification performance with a simple structure. This exhaust purification device is formed by loading catalysts in a plurality of honeycomb bodies arranged in series with intervals between them, and has a single outer cylinder (55), which constitutes an exhaust device of an internal combustion engine. A part of the exhaust passage of (40), the first honeycomb body (81), the second honeycomb body (82) and the third honeycomb body (83) are housed sequentially from the upstream side of the exhaust gas inside the outer cylinder (55). ), catalysts are loaded in the channels of the first honeycomb body (81), the second honeycomb body (82) and the third honeycomb body (83), and the second honeycomb body (82) acts as the same as the third honeycomb body (83) The same components are shared, and the outer diameter of the first honeycomb body (81) is the same as that of the second honeycomb body (82) and the third honeycomb body (83), and the cells separated in a grid pattern in the first honeycomb body (81) The number of cells per unit area is less than that of the third honeycomb body (83).

Description

technical field [0001] The present invention relates to an exhaust purification device. Background technique [0002] Conventionally, in an exhaust purification system for exhaust gas of an internal combustion engine, a device is known in which three honeycomb catalysts are arranged in series in the exhaust system to improve purification performance (for example, refer to Patent Document 1). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2010-37965 [0006] In the conventional exhaust gas purification device described above, the purification performance is improved by changing the outer diameter of the catalyst in accordance with the arrangement position of the catalyst. However, in the above exhaust purification device, the first catalyst carrier on the upstream side and the second catalyst carrier on the downstream side have different outer diameters, and the second catalyst carrier and the third catalys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/28F01N3/24
CPCF01N3/28F01N2330/48F01N2590/04F01N2450/22F01N13/0097
Inventor 下里法也小岛充中村健一郎政谷忠寿田尻秀聪中村正志
Owner HONDA MOTOR CO LTD
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