The present invention relates to a muffler for vehicle, being capable of augmenting engine's output power more than conventional tuning mufflers and more effectively eliminating exhaust noise.
A muffler, generally installed at the outlet of an exhaust pipe connected to an exhaust manifold, is a device that eliminates exhaust noise by reducing the pressure of exhaust gas from an engine. Mufflers are roughly divided into a dilation type, an absorption type, and a partition type. Of these, the partition type is generally used for conventional pure parts.
In the partition type muffler having multiple isolating partitions in it, the exhaust gas is step-wise reduced while passing the isolating partitions, and therefore, the partition type muffler has better noise elimination capability compared to other type mufflers. However, since the isolating partitions in itself impede or resist the flow of the exhaust gas, the engine output power is accordingly reduced.
Recently, many automobile maniacs like to tune or replace the original muffler to increase the engine output power at the sacrifice of noise elimination.
In the conventional muffler, since there is no obstacles in the exhaust gas passing channel 4, the exhaust gas can freely pass the channel 4 in the direction of ‘a’, but, for the same reason, the exhaust noise freely gives off the muffler also. In addition, since the exhaust gas passing channel 4 is always open to the atmosphere, the temperature in a combustion room of the engine becomes abnormally lower.
The present invention is invented to overcome the conventional tuning muffler's drawbacks. It is an object of the present invention to provide a muffler for vehicle that generates output power more than the conventional tuning muffler, and also increases the noise elimination capability more than convention partition type muffler.
It is another object of the present invention to provide a muffler for vehicle that prevents the temperature drop in the engine's combustion room occurring in the conventional muffler because the exhaust gas passing channel is always open to the atmosphere.
To achieve the above object, there is provided a muffler for vehicle comprising:
exhaust pressure control means connected to an exhaust manifold of an vehicle engine, for controlling pressure of the exhaust gas,
the exhaust pressure control means comprising an exhaust pressure control plate, which is pivotally attached to a predetermined position of the exhaust pressure control part, and
noise elimination means, which shapes generally a hollow pipe and is connected to the exhaust pressure control means part,
the noise elimination means comprising a mesh pipe, through which the exhaust gas passes; a sound absorber enveloping the mesh pipe; and a casing enclosing the sound absorber, whose one end is connected to the exhaust pressure control means and the other end is connected to an outlet.
According to another feature of the present invention, there is provided a muffler for vehicle comprising
noise elimination means, which shapes generally a hollow pipe and is connected to the exhaust pressure control means part, the noise elimination means comprising a mesh pipe, through which the exhaust gas passes; a sound absorber enveloping the mesh pipe; and a casing enclosing the sound absorber, whose one end is connected to the exhaust pressure control means and the other end is connected to an outlet,
exhaust pressure control means connected to an exhaust manifold of an vehicle engine, for controlling pressure of the exhaust gas,
the exhaust pressure control means comprising an exhaust pressure control plate, which is pivotally attached to a predetermined position of the exhaust pressure control part, and
at least one second noise elimination means connected to said noise elimination means, the second noise elimination means having the same construction as said noise elimination means.
It is preferable that the sound absorber is formed by piling at least two different sound absorbing materials, and the exhaust pressure control plate is located near the location of the engine. It is also preferable that the mesh pipe is dense so as not to be seen through it.
The above and other objects, features, and advantages of the present invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, in which:
The exhaust pressure control part 20 includes therein an exhaust pressure control plate 21 which is pivotally attached to a certain position of the top of the exhaust pressure control part 20. It is preferable that the exhaust pressure control plate 21 is positioned near the engine.
The noise elimination part 25 is composed of a mesh pipe 22, through which the exhaust gas passes; a sound absorber 23 enveloping the mesh pipe 22; and a casing 24 enclosing the sound absorber 23. The mesh pipe 22 is an element that replaces the multi-punctured pipe 2 shown in
Unlike the conventional multi-punctured pipe 2 in which a plurality of holes are penetrated, the mesh pipe 22 according to the present invention is constructed by a mesh sheet 22a (see
The sound absorber 23 eliminates the explosion sound of the exhaust gas, in which three different sound absorbing materials are piled: for example, a stainless steel wool 23a which adjoins the mesh pipe 22; a ceramic wool 23b in the intermediate layer; and a rock wool 23c in the outermost layer. The stainless steel wool 23a plays a role in absorbing the exhaust sound, protecting the other absorbing materials, and malting the exhaust sound mellow even in the long term use. The ceramic wool 23b is an excellent sound absorbing material that has the good heat-endurability and is strong dampproof. The rock wool 23c is also an excellent sound absorbing material. The structure of the above sound absorber 23 is just an example, and those who skilled in the relevant art may construct the sound absorber by using other materials.
In the mean time, the mesh pipe 22 shown in
Now the operation of the above-structured embodiment will be described. If the exhaust gas from the engine's exhaust manifold is introduced to the exhaust pressure control part 20, the exhaust pressure control plate 21 is backward pushed (see the dotted shape 21′ in
The exhaust noise, especially high-frequency noise, of the gas entering the noise elimination part 25 is absorbed by the sound absorber 23 through the fine meshes of the mesh pipe 22, thereby being eliminated. The mesh pipe 23 exhibits the much more effective sound elimination in that it increases the amount of exhaust sound entering the sound absorber 23 compared to the multi-punctured pipe of the conventional tuning muffler, and protects un-eliminated sound from discharging from the sound absorber 23. In addition, it also increases the engine power compared to the conventional multi-punctured pipe. In the present invention, since the sound absorber 23 is formed by piling different materials having different sound absorbing properties, the sound elimination efficiency can be more increased comparing to the conventional art.
By the way, in the exhaust pressure control part 20 shown in
While the invention has been shown and described with reference to certain embodiments to carry out this invention, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Number | Date | Country | Kind |
---|---|---|---|
20-2003-0029763 | Sep 2003 | KR | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/KR04/02407 | 9/20/2004 | WO | 3/13/2006 |