CN2316461Y

CN2316461Y - Purifying silencer for gas exhausted from motorcycle

Info

Publication number: CN2316461Y
Application number: CN 96249566
Authority: CN
Inventors: 章子元
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-12-27
Filing date: 1996-12-27
Publication date: 1999-04-28
Anticipated expiration: 2006-12-27

Abstract

The utility model relates to a purifying silencer for gas exhausted from motorcycles. On the basis of a motorcycle silencer structure, a straight hole honeycomb ceramic is arranged in the inner part of the motorcycle silencer for dipping rare earth catalyst. The utility model is a novel device, which is provided with double functions of exhaust gas purification and silencing. If the silencer of motorcycles with overproof harmful components is changed into the corresponding silencer of the utility model, the exhaust emission has desires to reach the standard of China or foreign countries.

Description

The motor exhaust purification silencer

The utility model relates to a kind of motor exhaust purification silencer that the motorcycle IC engine combustion gas is had noise reduction and purification function.

At present, all be to be purpose at the various motorcycle bafflers that use with the noise that reduces the exhausting air generation, simple principle according to noise reduction manufactures and designs, and does not have the purification function that reduces exhaust detoxation evil gas ingredients.

The purpose of this utility model is on the basis of former motorcycle baffler, increases a purification function that reduces exhaust detoxation evil gas ingredients, and a kind of motor exhaust purification silencer promptly is provided.

The purpose of this utility model is achieved in that at the leading portion position of motorcycle muffler shell inside, exhaust flow path and is provided with one through the impregnated ceramic honeycomb body of catalysis of rare-earth compound agent (abbreviation ceramic honey comb).Ceramic honey comb can select for use the steinheilite material to fire, and its structure is the straight hole (square hole or circular hole) of intensive orderly arrangement, and span thickness is advisable with the 0.4-1.2 millimeter, and the hole cross sectional area is good with the 1-4 square millimeter.Select for use the catalysis of rare-earth compound agent that carbon monoxide, hydrocarbon, nitrogen oxide are played good catalytic reaction to make impregnant.The ceramic honey comb product fully soaks in this impregnant, and the dry back of taking-up is available.When manufacturing and designing ceramic honey comb, should be according to the shape and structure and the size of baffler, make the straight hole of ceramic honey comb axially consistent, and can be fixed on securely on the inner walls with the exhaust general flow direction, make whole exhausts all each straight hole from the ceramic honey comb flow through.Blast air is when ceramic honey comb, and the rare earth compound that gets on dipping plays catalysis, makes the toxic gas major part in the exhaust be converted into the innocuous substance discharging.

The design principle of the aperture of ceramic honey comb, span thickness and hole length (both ceramic body thickness) is: under the prerequisite of increase exhaust resistance within reason, increase total surface area as far as possible, to improve the conversion ratio of toxic gas, make motor exhaust meet the regulation of related standards.

Owing to adopt such scheme, carry out appropriate design according to the motorcycle of different model, can make the 80-90% of carbon monoxide, hydrocarbon of exhausting air above, nitrogen oxide be converted into innoxious substance more than 60%.Because former silencer construction is constant substantially, ceramic honey comb also has sound deadening in addition, and erasure effect can not reduce because of increasing purification function.Because profile is identical with former baffler with installation dimension, has commutativity, easy-to-install advantage.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1: first embodiment's of motor exhaust purification silencer longitudinal section schematic diagram of structure.

Fig. 2: second embodiment's of motor exhaust purification silencer longitudinal section schematic diagram of structure.

Among the figure: 1, the ceramic honeycomb body of metal shell 2, noise reduction theory structure 3, dipping rare earth compound

In first embodiment's cartridge type exhaust gas purification baffler of Fig. 1, among the figure small arrow represent blast air to.Exhaust, is discharged from the other end by the structure (2) by the noise reduction principle design after cylindrical ceramic honey comb (3) is flow through in horn-like expansion through slender conduit.

In second embodiment's boxlike of Fig. 2 exhaust gas purification baffler, exhaust is turned back by the end that a slender conduit in the box (1) is mounted with sound absorbing material in the box, by rectangular ceramic honey comb (3), enter the other end that box is mounted with sound absorbing material by the breathing pipe on the dividing plate again, discharge from the other end of box by the slender conduit that is welded on the dividing plate.

Claims

1. motor exhaust purification silencer, its shape is identical with the motorcycle baffler with installation dimension, and internal structure and blast air is characterized in that to noise reduction principle design routinely: acquire a special material at metal shell exhaust gas inside flow process leading portion position.

2. motor exhaust purification silencer according to claim 1 is characterized in that: used special material is a kind of ceramic honeycomb body through the agent of dipping catalysis of rare-earth compound.

3. motor exhaust purification silencer according to claim 1, it is characterized in that: the structure of ceramic honeycomb body is the straight hole of intensive orderly arrangement, the cross section of straight hole can be justified, and its area is in 1-4 square millimeter scope, and hole interbody spacer thickness is in 0.4-1.2 millimeter scope.

4. motor exhaust purification silencer according to claim 1, it is characterized in that: the respective model design of motorcycle baffler is pressed in the shape of ceramic honeycomb body, size and installation position, exhaust must be passed through from each straight hole of ceramic honeycomb body, and the axial of straight hole always flows to consistent with exhaust.