TWM566753U - Variable volume exhaust pipe - Google Patents

Abstract

This creation is an exhaust pipe that can change the exhaust volume. It is installed in a car engine and includes a three-way valve, an engine tube connected to the automobile engine, a straight pipe connected to the outside, a silence pipe and a silencer. Device. The muffler is connected to the muffler tube, and the muffler tube is connected to the outside through the muffler. The three-way valve simultaneously connects the engine tube, the straight tube and the muffler tube, and the three-way valve selectively connects the engine tube to the straight tube or the muffler tube while closing the other. The three-way valve of the present invention also closes the outlet end of the silencer tube while opening the outlet end of the straight tube, so that the path of the gas flow does not form a Helm due to the structure of the tee tube. The Holtz resonator can overcome the silencing effect brought about by the Helmholtz principle, and the overall exhaust volume is further improved.

Description

Variable volume exhaust pipe

The present invention relates to an automobile exhaust pipe, and more particularly to an exhaust pipe that can change the exhaust volume.

Having a car has always been the dream of many people. Vehicle modification is also a means for many car dealers to adapt their own personality or to create the ideal love in their hearts. In the vehicle modification project, the exhaust pipe has been modified. It has been a relatively popular option since. In order to control the noise while enjoying the sound of the exhaust pipe, many people will install a sound-changing device (vacuum, electronic valve) in the exhaust pipe, so that the exhaust pipe can increase the volume in the suburbs to give enough loudness. The sound waves, while in the urban area, can maintain the original low volume to ensure that it will not cause trouble to others.

Referring to FIG. 9 and FIG. 10, in the prior art, the principle of changing the volume of the exhaust pipe by the sound changing device (vacuum, electronic valve) is as follows. First, the general exhaust pipe is provided with a muffler 91, so that when the gas passes, First, reduce the volume of the overall discharger and then flow to the outside; and increase the volume of the exhaust by adding a straight-through pipe 92 that does not flow through the silencer 91 and directly connect the engine to the outside, and communicate with a three-way pipe 93. The muffler 91 and the straight tube 92, and a valve 94 is disposed between the straight tube 92 and the tee tube 93 to control the flow of the straight tube 92, whereby when the valve 94 is closed, the gas cannot pass through the tee 93 has a valve 94 on one end, so the steering flows from the other end to the silencer 91 and is silenced to maintain the original low exhaust volume (as shown in Figure 9); and when the valve 94 is open, the gas passes directly through the valve 94 and It is discharged by the straight-through pipe 92 and retains the original exhaust volume of the engine, that is, the relative increase of the exhaust volume (as shown in FIG. 10).

However, due to the structure of the tee 93 itself, regardless of the direction of flow of the gas as it passes through the tee 93, the tee 93 forms a lateral space on the side of the gas flow direction, and the lateral space for the flowing gas A Helmholtz resonator is formed, and the volume of the gas flowing in the straight tube 92 is lowered due to the Helmholtz principle, so even if it does not flow through the silencer 91, the overall exhaust volume is compared to the original engine. The exhaust volume will still be significantly reduced, that is to say, the structure of the tee pipe 93 itself will cause the muffling effect, so even if it is directly discharged to the outside through the straight pipe 92, but the flow through the muffler In terms of the exhaust volume of 91, the overall volume increase is less than ideal, so the prior art volume changeable exhaust pipe does need to be improved.

In addition, the shaft of the valve 94 is disposed in the center of the pipe, and such a design also blocks the air flow and further reduces the exhaust volume.

In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a variable volume exhaust pipe which overcomes the silencing effect brought about by the Helmholtz resonant cavity and further improves the overall exhaust volume.

In order to achieve the above creative purpose, the technical means adopted in this creation is to design a variable volume exhaust pipe, which comprises: an intersection space; an engine tube connected to the automobile engine and extending to the intersection space; a tube that is connected to the outside and extends to the intersection space; a muffling tube that extends to the intersection space; a three-way valve that is located in the intersection space and that connects the engine tube, the straight tube, and the muffler tube And the three-way valve selectively connects the engine tube to one of the straight tube and the muffler tube, and simultaneously closes the other; a muffler connected to the muffler tube, and the muffler tube The silencer is connected to the outside world.

The advantage of the present invention is that a three-way valve is provided at the junction of the engine tube, the straight tube and the muffler tube, and the three-way valve is selectively closed to the outlet end of the straight tube or to the silencer tube. At the outlet end, the three-way valve can be used to control whether the gas flows through the muffler, thereby changing the volume of the exhaust gas; and, while the three-way valve is open to the outlet end of the straight pipe to increase the exhaust volume, The valve also closes the outlet end of the muffler tube to avoid forming a lateral space on the side of the gas flow direction as in the prior art, so that the flow is not in the path of the gas flow because of the tee The structure forms a Helmholtz resonant cavity, which can overcome the silencing effect brought about by the Helmholtz principle, and further improve the overall exhaust volume.

Further, the variable volume exhaust pipe, wherein the three-way valve comprises a three-way pipe, comprising an inlet end and two outlet ends, the inlet end being connected to the engine pipe, the two outlet ends respectively Connected to the straight tube and the muffling tube; a valve pivotally disposed in the tee tube and selectively closing one of the outlet ends of the tee tube; a driving element disposed on the tee tube It is externally connected to the valve and drives the valve to rotate relative to the tee.

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

The technical means adopted by the present invention for achieving the intended purpose of creation are further explained below in conjunction with the drawings and the preferred embodiment of the present invention.

Referring to FIG. 1 , the variable volume exhaust pipe of the present invention is installed in an automobile engine A and includes a meeting space 10 , an engine tube 20 , a straight pipe 30 , a muffling pipe 40 , and a three - way valve 50 . And a silencer 60.

The engine tube 20 is connected to the automobile engine A and extends to the intersection space 10; the straight tube 30 is connected to the outside and extends to the intersection space 10; the silencer tube 40 is connected to the silencer 60 and is connected to the outside by the silencer 60, and is silenced. The tube 40 extends to the intersection space 10; that is, there are two exhaust paths that can be selected after the gas is discharged from the automobile engine A to the engine tube 20, one of which is to flow through the muffler tube 40 connected to the muffler 60 and is silenced. Discharge to the outside; the other is to flow through the straight pipe 30 and discharge to the outside without being silenced; and the engine pipe 20 forms a meeting with 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 is connected to the engine tube 20, the straight tube 30 and the muffling tube 40, and the three-way valve 50 selectively connects the engine tube 20 to one of the straight tube 30 and the muffling tube 40, and simultaneously The other is closed; that is, the engine tube 20 and the two exhaust paths (that is, the straight tube 30 and the muffling tube 40) are connected to the three-way valve 50 after extending to the intersection space 10, and the three-way valve 50 may select whether the engine tube 20 is to be connected to the straight tube 30 or the muffling tube 40, and the engine tube 20 is closed to the communication tube 30 while closing the communication port between the engine tube 20 and the muffling tube 40, or is the engine tube 20 closes the communication port between the engine tube 20 and the straight tube 30 while communicating to the muffler tube 40.

Referring to FIGS. 2, 3, 4 and 5, in a preferred embodiment, the three-way valve 50 includes a tee 51, a valve 52 and a drive member 53. The tee 51 includes an inlet end 511 and two outlet ends 512. The inlet end 511 is connected to the engine tube 20, and the two outlet ends 512 are respectively connected to the straight tube 30 and the muffler tube 40. The valve 52 is pivotally disposed in the tee tube 51. And selectively closing one of the outlet ends 512 of the tee tube 51; the driving element 53 is a vacuum valve disposed outside the tee tube 51 and connected to the valve 52, and driving the valve 52 to rotate relative to the tee tube 51, However, the drive member 53 is not limited to the vacuum valve, and may be any member that can rotate the valve 52 relative to the tee 51, such as an electronic valve. Further, the configuration of the three-way valve 50 is not limited to the above, and may be any configuration. It is only necessary to select which exhaust path the engine tube 20 is connected to, and to close another exhaust path at the same time.

Referring to FIG. 1, FIG. 5 and FIG. 6, the present invention controls the driving element 53 of the three-way valve 50 via an external device in use to rotate the valve 52 relative to the tee 51, and the valve 52 is selectively opened therein. An outlet end 512 closes the other open end 512, whereby the valve 52 can close the communication between the three-way valve 50 and the straight-through tube 30 when a low exhaust volume is desired, so that the engine exhausts through the tee The valve 50 flows to the muffler tube 40 and passes through the muffler 60 and is silenced and then discharged to the outside; otherwise, if a high exhaust volume is desired, the valve 52 closes the communication between the three-way valve 50 and the muffler tube 40, such that The engine exhaust gas flows to the straight-through pipe 30 via the tee pipe 50 and is directly discharged to the outside without any muffling treatment, and at this time, since the valve 52 closes the communication between the three-way valve 50 and the muffler pipe 40, the tee The tube 51 does not form a lateral space on the side of the engine gas flow direction, so the Helmholtz resonance cavity is not formed for the flowing gas, so that the silencing effect brought by the Helmholtz principle can be overcome. To make the overall exhaust volume more Further improvement.

In addition, when the present invention is used, there may be various combinations, for example, as shown in FIG. 7, a total of two intersection spaces 10A, one engine tube 20A, two straight tubes 30A, two silence tubes 40A, and two three-way valves 50A may be included. And a silencer 60A. The engine tube 20A extends to the two intersection spaces 10A at the same time, and is simultaneously connected to the two-way valve 50A respectively located in the two intersection spaces 10A; and each of the three-way valves 50A is connected to the engine tube 20A and also has a straight-through tube. 30A and a muffler tube 40A; the two straight-through pipes 30A are respectively connected to the two-way valve 50A and communicate with the outside; the two muffler pipes 40A are simultaneously connected to the muffler 60A and communicated to the outside via the muffler 60A; It can also overcome the noise reduction effect brought by the Helmholtz resonator and further improve the overall exhaust volume.

Or, when the two sets of the original creations are used together, please refer to FIG. 8 , which may include two intersection spaces 10B , two engine tubes 20B , two straight tubes 30B , two silence 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 individually connected with an engine tube 20B, a straight tube 30B, and a silencing tube 40B; the two engine tubes 20B respectively extend to the two intersection spaces 10B, and Connected to the two-way valve 50B; the two straight-through pipes 30B are respectively connected to the two-way valve 50B and are connected to the outside; the two muffler pipes 40B are respectively connected to the two-way valve 50B, and are respectively connected to the two muffler 60B, and The two muffler 60B are respectively connected to the outside through the two silencers 60B; in this setting, the same can be achieved by overcoming the silencing effect brought by the Helmholtz resonant cavity, and further improving the overall exhaust volume. .

The above description is only a preferred embodiment of the present invention, and does not impose any form limitation on the present invention. Although the present invention has been disclosed above in the preferred embodiment, it is not intended to limit the present creation, and has any technical field. A person skilled in the art can make some modifications or modifications to equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention. The technical essence of the creation Any simple modification, equivalent change and modification of the above embodiments are still within the scope of the technical solution of the present invention.

A‧‧‧Automobile engine
10‧‧‧ rendezvous space
20‧‧‧Engine tube
30‧‧‧ straight tube
40‧‧‧Muffler tube
50‧‧‧Three-way valve
51‧‧‧Three-way pipe
511‧‧‧ entrance end
512‧‧‧export end
52‧‧‧ Valve
53‧‧‧Drive components
60‧‧‧Muffler
10A‧‧‧Intersection space
20A‧‧‧Engine tube
30A‧‧‧ straight tube
40A‧‧‧Small tube
50A‧‧‧3-way valve
60A‧‧‧Muffler
10B‧‧‧Intersection space
20B‧‧‧Engine tube
30B‧‧‧ straight tube
40B‧‧‧Muffler tube
50B‧‧‧3-way valve
60B‧‧‧Muffler

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the connection of elements in the first embodiment of the present invention. Figure 2 is a perspective view of the three-way valve of the present invention. Fig. 3 is another perspective view of the three-way valve of the present invention. Figure 4 is an exploded view of the three-way valve of the present invention. Figure 5 is a schematic cross-sectional view showing the flow of gas to the straight tube in the first embodiment of the present invention. Figure 6 is a schematic cross-sectional view showing the flow of gas to the muffler tube in the first embodiment of the present invention. Figure 7 is a schematic view showing the connection of the components in the second embodiment of the present invention. Figure 8 is a schematic view showing the connection of the components in the third embodiment of the present invention. Figure 9 is a schematic illustration of the gas flow direction of a prior art exhaust pipe. Fig. 10 is a schematic view showing the flow of gas when the exhaust pipe of the prior art is increased in volume.

Claims (4)

A variable volume exhaust pipe installed in an automobile engine and including a rendezvous space; an engine tube connected to the automobile engine and extending to the intersection space; communicating through the pipe to the outside and extending To the intersection space; a muffling pipe extending to the intersection space; a three-way valve located in the intersection space, connecting the engine tube, the straight tube and the muffling tube, and the three-way valve selectively enabling The engine tube communicates with one of the straight tube and the muffler tube, and simultaneously closes the other; a muffler connected to the muffler tube, and the muffler tube is connected to the outside by the muffler. The variable volume exhaust pipe of claim 1, wherein the three-way valve comprises a three-way pipe, comprising an inlet end and two outlet ends, the inlet end being connected to the engine tube, the two outlet ends respectively Connected to the straight tube and the muffler tube; a valve pivotally disposed in the tee tube and selectively closing one of the outlet ends of the tee tube; a driving element disposed on the tee tube It is externally connected to the valve and drives the valve to rotate relative to the tee. The variable volume exhaust pipe of claim 2, wherein the drive element of the three-way valve is a vacuum valve. The variable volume exhaust pipe of claim 2, wherein the drive element of the three-way valve is an electronic valve.