TW202004001A - Exhaust pipe capable of changing volume overcoming a noise muffling effect brought by the Helmholtz principle and further improving an overall exhaust volume - Google Patents

Abstract

This invention relates to an exhaust pipe capable of changing an exhaust volume. The exhaust pipe is installed on a vehicle engine and includes a three-way valve, an engine pipe connected to the vehicle engine, a straight pipe communicated to the outside, a muffler pipe and a muffler. The muffler is connected with the muffler pipe, and the muffler pipe is communicated to the outside by means of the muffler. The three-way valve is simultaneously connected with the engine pipe, the straight pipe and the muffler pipe, and the three-way valve selectively allows the engine pipe to communicate to the straight pipe or the muffler pipe and close the other at the same time. The three-way valve of this invention will close an outlet end communicated to the muffler pipe while opening an outlet end communicated to the straight pipe. In this way, a path in which a gas flows will not form a Helmholtz resonance cavity due to a structure of the three-way pipe, and may further overcome a noise muffling effect brought by the Helmholtz principle, and further improve an overall exhaust volume.

Description

Variable volume exhaust pipe

This creative department relates to an automobile exhaust pipe, especially an exhaust pipe which can change the exhaust volume.

Owning a car has always been the dream of many people. Vehicle modification is also a means for many gamers to meet their personalities or to create the ideal love horse in their hearts. In the project of vehicle modification, the modification of the exhaust pipe has always been It has been a relatively popular option since. In order to control the noise at the same time while enjoying the sound waves of the exhaust pipe, many people will install a sound changing device (vacuum, electronic valve) on the exhaust pipe, so that the exhaust pipe can increase the volume in the suburbs and emit enough loudness. Sound waves, while in the urban area can maintain the original low volume to ensure that it will not cause trouble to others.

Please refer to FIGS. 9 and 10. In the prior art, the principle of changing the volume of the exhaust pipe with a sound changing device (vacuum, electronic valve) is as follows. First, the general exhaust pipe is equipped with a silencer 91, so that when the gas passes through First reduce the overall exhaust volume before flowing to the outside world; the way to increase the exhaust volume is to add a straight pipe 92 that does not flow through the muffler 91 and connect it directly to the engine and the outside world, and a three-way pipe 93 to communicate The muffler 91 and the straight pipe 92, and a valve 94 is provided between the straight pipe 92 and the three-way pipe 93 to control the flow of the straight pipe 92, so that when the valve 94 is closed, the gas will not pass through the three-way pipe 93 at one end of the valve 94, so the flow from the other end to the silencer 91 is silenced to maintain the original low exhaust volume (as shown in Figure 9); and when the valve 94 is opened, the gas passes directly through the valve 94 and The through-pipe 92 discharges and retains the original exhaust volume of the engine, that is, relatively increases the exhaust volume (as shown in FIG. 10).

However, due to the structure of the three-way pipe 93, no matter what the flow direction is when the gas passes through the three-way pipe 93, the three-way pipe 93 will form a lateral space on the side where the gas flows, and the lateral space will be A Helmholtz resonance cavity is formed, and the volume of the gas flowing in the straight pipe 92 is reduced due to the Helmholtz principle, so even if it does not flow through the muffler 91, the overall exhaust volume is compared to the original engine The exhaust volume will still be significantly reduced, which means that the structure of the three-way pipe 93 itself will cause a silencer effect, so even if the engine is directly discharged to the outside world through the straight pipe 92, but relative to the flow through the silencer As far as the exhaust volume of 91 is concerned, the overall volume increase is less than ideal, so the exhaust pipe with variable volume in the prior art really needs to be improved.

In addition, the rotating shaft of the valve 94 is located in the center of the pipeline. This design will also block the air flow and further reduce the volume of the exhaust.

In view of the aforementioned shortcomings and deficiencies of the prior art, this creation provides a variable volume exhaust pipe, which can overcome the silencing effect brought by the Helmholtz resonant cavity, and further improve the overall exhaust volume.

In order to achieve the above-mentioned creative purpose, the technical means adopted in this creation is to design a variable volume exhaust pipe, which includes: a meeting space; an engine pipe, which is connected to the car engine and extends to the meeting space; has been A through pipe, which communicates with the outside world and extends to the intersection space; a muffler pipe, which extends to the intersection space; and a three-way valve, which is located in the intersection space and connects the engine pipe, the straight pipe, and the muffler pipe , And the three-way valve selectively connects the engine pipe to one of the straight pipe and the muffler pipe, and at the same time closes the other; a muffler, which is connected to the muffler pipe, and the muffler pipe passes the The silencer communicates with the outside world.

The advantage of this creation is that by installing a three-way valve at the junction of the engine pipe, the straight pipe and the muffler pipe, and selectively closing the outlet port of the straight pipe or the muffler pipe with the three-way valve The outlet end, by which the three-way valve can control whether the gas flows through the silencer, thereby changing the size of the exhaust volume; and, while the three-way valve opens the outlet end connected to the straight pipe to increase the exhaust volume, the three The through valve will also close the outlet end of the muffler tube to avoid forming a lateral space on the side of the gas flow as in the prior art. This creation will not cause the gas to flow on the path of the three-way tube. The structure forms a Helmholtz resonant cavity, which can overcome the silencing effect brought by the Helmholtz principle and further increase the overall exhaust volume.

Further, in the variable volume exhaust pipe, wherein the three-way valve includes a three-way pipe, which includes an inlet end and two outlet ends, the inlet end communicates with the engine pipe, and the two outlet ends are respectively Connected to the straight pipe and the muffler pipe; a valve, which is pivotally arranged in the three-way pipe, and selectively closes one of the outlet ends of the three-way pipe; and a driving element, which is arranged on the three-way pipe It is connected to the valve and drives the valve to rotate relative to the tee.

Further, in the variable volume exhaust pipe, the driving element of the three-way valve is a vacuum valve and an electronic valve.

The technical means adopted by this creation to achieve the intended purpose of creation will be further described in conjunction with the drawings and preferred embodiments of this creation.

Please refer to FIG. 1, the variable volume exhaust pipe of this creation is installed in a car engine A and includes an intersection space 10, an engine pipe 20, a straight through pipe 30, a muffler pipe 40, and a three-way valve 50 And a silencer 60.

The engine tube 20 is connected to the car engine A and extends to the intersection space 10; the straight-through tube 30 communicates with the outside world and extends to the intersection space 10; the muffler tube 40 communicates with the muffler 60 and communicates with the outside world through the muffler 60 and silences The tube 40 extends to the intersection space 10; that is to say, there are two kinds of exhaust paths that can be selected after the gas is discharged from the car engine A to the engine tube 20. One is to pass through the muffler tube 40 connected to the muffler 60 and be silenced. Emitted to the outside world; the other is discharged to the outside world without flowing through the straight pipe 30; and there is an intersection between the engine pipe 20 and the two exhaust paths (that is, the straight pipe 30 and the muffler pipe 40) Space 10.

The three-way valve 50 is located in the intersection space 10 and connects the engine pipe 20, the straight pipe 30 and the muffler pipe 40, and the three-way valve 50 selectively connects the engine pipe 20 to one of the straight pipe 30 and the muffler pipe 40, and at the same time Close the other; that is, the engine pipe 20 and the two exhaust paths (ie, the straight pipe 30 and the muffler pipe 40) are connected to the three-way valve 50 after extending to the intersection space 10, and the three-way valve 50 can choose whether the engine pipe 20 is connected to the straight pipe 30 or the muffler pipe 40, and the engine pipe 20 is connected to the straight pipe 30 while closing the communication port between the engine pipe 20 and the muffler pipe 40, or the engine pipe 20 communicates with the muffler tube 40 while closing the communication port between the engine tube 20 and the straight-through tube 30.

Please refer to FIGS. 2, 3, 4 and 5. In a preferred embodiment, the three-way valve 50 includes a three-way pipe 51, a valve 52 and a driving element 53. The three-way pipe 51 includes an inlet end 511 and two outlet ends 512. The inlet end 511 is connected to the engine pipe 20, and the two outlet ends 512 are respectively connected to the straight pipe 30 and the muffler pipe 40; the valve 52 is pivotally arranged in the three-way pipe 51. And selectively close one of the outlet ends 512 of the three-way pipe 51; the driving element 53 is a vacuum valve, which is arranged outside the three-way pipe 51 and connected to the valve 52, and drives the valve 52 to rotate relative to the three-way pipe 51, However, the driving element 53 is not limited to the vacuum valve, and may be any element that can rotate the valve 52 relative to the three-way pipe 51, such as an electronic valve. In addition, the structure of the three-way valve 50 is not limited to the above, and may be any structure, as long as the exhaust path through which the engine pipe 20 communicates can be selected, and another exhaust path can be closed at the same time.

Please refer to FIG. 1, FIG. 5 and FIG. 6, when the author uses the drive element 53 of the three-way valve 50 through an external device to rotate the valve 52 relative to the three-way pipe 51, and the valve 52 is selectively opened At the same time, one outlet end 512 closes the other open end 512, so that when a low exhaust volume is desired, the valve 52 can close the connection between the three-way valve 50 and the straight pipe 30, so that the engine exhaust will pass through the three-way The valve 50 flows to the muffler tube 40 and passes through the muffler 60 and is silenced before being discharged to the outside world; on the contrary, if a high exhaust volume is desired, the valve 52 is used to close the connection between the three-way valve 50 and the muffler tube 40. The engine exhaust will flow to the straight pipe 30 through the three-way pipe 50 and be directly discharged to the outside world without any silencer treatment. At this time, because the valve 52 closes the communication between the three-way valve 50 and the silencer pipe 40, the three-way pipe The tube 51 will not have a lateral space on the side where the engine gas flows, so the flowing gas will not form a Helmholtz resonant cavity, so as to overcome the silencing effect brought by the Helmholtz principle , So that the overall exhaust volume is further improved.

In addition, when this creative is used, there can be many combinations and changes. For example, as shown in FIG. 7, it can include two intersection spaces 10A, one engine pipe 20A, two straight pipes 30A, two silencers 40A, and two three-way valves 50A And a silencer 60A. The engine pipe 20A extends to the two intersection spaces 10A at the same time, and is connected to the two three-way valves 50A located in the two intersection spaces 10A at the same time; and each three-way valve 50A is connected to a straight pipe in addition to the engine pipe 20A 30A and one muffler tube 40A; the two straight-through tubes 30A are respectively connected to the two three-way valves 50A and communicate with the outside world; the two muffler tubes 40A are simultaneously connected to the muffler 60A and communicate to the outside world through the muffler 60A; under this setting, It can also achieve the effect of overcoming the silencing effect of the Helmholtz resonant cavity and further improving the overall exhaust volume.

Or, when two sets of the original works are used together, please refer to FIG. 8, which can include two intersection spaces 10B, two engine tubes 20B, two straight tubes 30B, two muffler tubes 40B, two three-way valves 50B and Two silencers 60B. The two three-way valves 50B are respectively located in the two intersection spaces 10B, and the two three-way valves 50B are simultaneously connected with an engine tube 20B, a straight through tube 30B, and a muffler tube 40B; the two engine tubes 20B extend to the two intersection spaces 10B, and Are respectively connected to the two three-way valves 50B; the two straight-through pipes 30B are respectively connected to the two three-way valves 50B and are all connected to the outside world; the two muffler pipes 40B are respectively connected to the two three-way valves 50B and are respectively connected to the two mufflers 60B, The two mufflers 60B are connected to the outside world; under this setting, the same effect can be achieved to overcome the noise reduction effect of the Helmholtz resonant cavity and further improve the overall exhaust volume. .

The above is only the preferred embodiment of the creation, and does not limit the creation in any way. Although the creation has been disclosed in the preferred embodiment as above, it is not intended to limit the creation. Generally, a knowledgeable person can use the technical content disclosed above to make some changes or modifications to equivalent embodiments without departing from the scope of this creative technical solution. Any content that does not deviate from this creative technical solution is based on this Any simple modifications, equivalent changes, and modifications made to the above embodiments by the technical essence of the creation still fall within the scope of this creative technical solution.

A‧‧‧Car engine 10‧‧‧Rendezvous space 20‧‧‧Engine pipe 30‧‧‧Straight pipe 40‧‧‧Muffler pipe 50‧‧‧Three-way valve 51‧‧‧Three-way pipe 511‧‧‧ Inlet end 512‧‧‧Export 52‧‧‧Valve 53‧‧‧Drive element 60‧‧‧Muffler 10A‧‧‧Rendezvous space 20A‧‧‧Engine pipe 30A‧‧‧Straight pipe 40A‧‧‧Muffler 50A‧‧ ‧Three-way valve 60A‧‧‧Muffler 10B‧‧‧Rendezvous space 20B‧‧‧Engine pipe 30B‧‧‧Straight pipe 40B‧‧‧Muffler pipe 50B‧‧‧Three-way valve 60B‧‧‧Muffler

FIG. 1 is a schematic diagram of connection of components in the first embodiment of the present creation. Figure 2 is a perspective view of the three-way valve created by the author. Fig. 3 is another three-dimensional appearance view of the three-way valve of the present creation. Figure 4 is an exploded view of the components of the three-way valve of this creation. 5 is a schematic cross-sectional view of a gas flowing through a straight pipe in the first embodiment of the present creation. 6 is a schematic cross-sectional view of the gas flowing to the muffler tube in the first embodiment of the present creation. FIG. 7 is a schematic diagram of connection of components in the second embodiment of the present creation. FIG. 8 is a schematic diagram of connection of components in the third embodiment of the present creation. 9 is a schematic diagram of the gas flow direction of the prior art exhaust pipe. FIG. 10 is a schematic diagram of the gas flow direction of the prior art exhaust pipe when the volume is increased.

A‧‧‧Car engine

10‧‧‧Rendezvous space

20‧‧‧Engine tube

30‧‧‧straight pipe

40‧‧‧Muffler

50‧‧‧Three-way valve

60‧‧‧Muffler

Claims (4)

A variable-volume exhaust pipe installed in an automobile engine and including a meeting space; an engine pipe connected to the automobile engine and extending to the meeting space; a continuous pipe that communicates with the outside world and extends To the intersection space; a muffler tube, which extends to the intersection space; a three-way valve, which is located in the intersection space, and connects the engine tube, the straight-through tube, and the muffler tube, and the three-way valve selectively enables The engine tube communicates with one of the straight-through tube and the muffler tube, and at the same time closes the other; a muffler is connected to the muffler tube, and the muffler tube is connected to the outside through the muffler. The variable volume exhaust pipe according to claim 1, wherein the three-way valve includes a three-way pipe, which includes an inlet end and two outlet ends, the inlet end communicates with the engine pipe, and the two outlet ends are respectively Connected to the straight pipe and the muffler pipe; a valve, which is pivotally arranged in the three-way pipe, and selectively closes one of the outlet ends of the three-way pipe; a driving element, which is arranged on the three-way pipe It is connected to the valve and drives the valve to rotate relative to the tee. The variable volume exhaust pipe according to claim 2, wherein the driving element of the three-way valve is a vacuum valve. The variable volume exhaust pipe according to claim 2, wherein the driving element of the three-way valve is an electronic valve.

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