Engine exhaust device

Abstract

The utility model relates to an engine exhaust device which is connected with an exhaust passage of an engine and comprises an exhaust guide pipe, a silencer and an exhaust tail pipe, the exhaust guide pipe comprises an exhaust guide pipe inlet end and an exhaust guide pipe outlet end, and the exhaust guide pipe inlet end is connected with the exhaust passage. The silencer comprises a silencer inlet end and a silencer outlet end, the silencer inlet end is connected with the exhaust guide pipe outlet end, and the silencer outlet end is communicated with the atmosphere. The exhaust tail pipe is contained in the silencer, gas from the inlet end of the silencer is guided to the outlet end of the silencer through the outlet end of the exhaust tail pipe, and a deposition area is concavely arranged in the exhaust tail pipe. Therefore, by means of the configuration structure, carbon-residue-containing condensate water generated when the vehicle is started cannot be directly discharged out of the silencer and cannot flow back to the advancing path of waste gas, and the commodity after the vehicle is used is really improved.

Description

Technical Field

[0001] This utility model relates to an engine exhaust device, and more particularly to an engine exhaust device suitable for straddle-type vehicles. Background Technology

[0002] In existing technologies, the exhaust system of a fuel vehicle engine typically has an exhaust duct and a muffler, which can optimize the exhaust gas after engine combustion, adjust the sound of the instantaneous expansion of exhaust gas and the exhaust back pressure, so that the vehicle's power performance, purification efficiency and driving pleasure are all adjustable.

[0003] The engine produces condensate after the exhaust gas expands following combustion, and this condensate contains carbon residue from gasoline combustion. When these two combine, they form carbon residue-containing condensate that is discharged from the muffler. The condensate is black in color, and in some cases, it flows out of the muffler, forming stains that are extremely unsightly.

[0004] Driven by this, and with a spirit of active creation, the inventor sought an engine exhaust device that could solve the above problems. After several research and experiments, he finally completed this utility model. Utility Model Content

[0005] The main purpose of this utility model is to provide an engine exhaust device. Through the configuration structure of this utility model, the carbon slag condensate produced when the vehicle is started will not be directly discharged outside the muffler, nor will it flow back into the exhaust gas path, thus effectively improving the commercial value of the vehicle after use.

[0006] To achieve the above objectives, this utility model provides an engine exhaust device connected to an exhaust passage of an engine, including an exhaust duct, a muffler, and an exhaust tailpipe. The exhaust duct includes an exhaust duct inlet end and an exhaust duct outlet end, with the exhaust duct inlet end connected to the exhaust passage. The muffler includes a muffler inlet end and a muffler outlet end, with the muffler inlet end connected to the exhaust duct outlet end and the muffler outlet end communicating with the atmosphere. The exhaust tailpipe is housed within the muffler, guiding the gas from the muffler inlet end through the exhaust tailpipe outlet end to the muffler outlet end. A deposition area is recessed within the exhaust tailpipe.

[0007] The aforementioned exhaust tailpipe may include a front exhaust tailpipe, a rear exhaust tailpipe, and a connecting pipe, with the connecting pipe connecting to the front exhaust tailpipe and the rear exhaust tailpipe respectively.

[0008] The aforementioned front exhaust tailpipe and connecting pipe can be a single-piece structure, the rear exhaust tailpipe and connecting pipe can be a single-piece structure, or the front exhaust tailpipe, rear exhaust tailpipe and connecting pipe can be a single-piece structure.

[0009] The aforementioned deposition zone can be recessed between the outer wall of the front exhaust tailpipe and the inner wall of the connecting pipe.

[0010] The diameter of the aforementioned front exhaust tailpipe can be smaller than the diameter of the rear exhaust tailpipe.

[0011] The opening of the aforementioned sedimentation zone faces upwards from the horizontal line, ensuring that the sedimentation zone can indeed contain carbonaceous slag condensate.

[0012] The opening direction of the exhaust tailpipe outlet is below the horizontal line to adjust the discharge direction of exhaust gas and carbon residue.

[0013] With the above design, when carbon slag condensate is generated in the engine exhaust system and expelled by the exhaust back pressure, the carbon slag condensate will be guided to the rear exhaust tailpipe. However, because the rear exhaust tailpipe has a slope, the carbon slag condensate cannot be discharged upwards and will accumulate in the sedimentation area. Then, the high temperature generated by the engine will evaporate the carbon slag condensate into pure carbon slag, and then it will be discharged from the muffler by the exhaust back pressure. In this way, the stain phenomenon caused by carbon slag condensate flowing out of the muffler will not be formed.

[0014] The above overview and the following detailed description are illustrative in nature and are intended to further illustrate the scope of the present invention. Other objects and advantages of the present invention will be described in the subsequent detailed embodiments and accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a perspective view of a motorcycle with an engine exhaust device according to the first embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the engine exhaust device according to the first embodiment of the present invention.

[0017] Figure 3 This is a partially enlarged view of the exhaust tailpipe according to the first embodiment of this utility model.

[0018] Figure 4 This is a partially enlarged view of the exhaust tailpipe according to the second embodiment of this utility model.

[0019] Explanation of key component symbols:

[0020] 1. Engine exhaust system

[0021] 10 engines

[0022] 2. Exhaust duct

[0023] 21. Exhaust duct inlet end

[0024] 22 Exhaust duct outlet end

[0025] 3. Muffler

[0026] 31. Silencer inlet end

[0027] 32. Silencer outlet end

[0028] 4, 4' Exhaust tailpipe

[0029] 40 Exhaust tailpipe outlet end

[0030] 41, 41' Front exhaust tailpipe

[0031] 42, 42' Rear Exhaust Tailpipe

[0032] 43, 43' connecting pipe

[0033] Pipe diameters D1, D1', D2, D2'

[0034] Opening directions of E1 and E2

[0035] H horizontal line

[0036] P, P' sedimentary areas Detailed Implementation

[0037] Please see Figures 1 to 3 The figures show a perspective view of a motorcycle with an engine exhaust device according to the first embodiment of this utility model, a schematic diagram of the engine exhaust device, and a partially enlarged view of the exhaust tailpipe. The figures show an engine exhaust device 1 connected to an exhaust passage (not shown) of an engine 10, including an exhaust duct 2, a muffler 3, and an exhaust tailpipe 4.

[0038] The exhaust duct 2 includes an exhaust duct inlet end 21 and an exhaust duct outlet end 22. The exhaust duct inlet end 21 is connected to the exhaust passage of the engine 10. The muffler 3 includes a muffler inlet end 31 and a muffler outlet end 32. The muffler inlet end 31 is connected to the exhaust duct outlet end 22, and the muffler outlet end 32 is open to the atmosphere to reduce noise generated by exhaust gases. The exhaust tailpipe 4 is housed within the muffler 3 and guides the gas from the muffler inlet end 31 through an exhaust tailpipe outlet end 40 to the muffler outlet end 32.

[0039] The exhaust tailpipe 4 includes a front exhaust tailpipe 41, a rear exhaust tailpipe 42, and a connecting pipe 43. The connecting pipe 43 connects the front exhaust tailpipe 41 and the rear exhaust tailpipe 42 respectively. In this embodiment, the rear exhaust tailpipe 42 and the connecting pipe 43 are an integral structure. A deposition area P is recessed within the exhaust tailpipe 4. Specifically, the deposition area P is recessed between the outer wall of the front exhaust tailpipe 41 and the inner wall of the connecting pipe 43, and the diameter D1 of the front exhaust tailpipe 41 is smaller than the diameter D2 of the rear exhaust tailpipe 42. Furthermore, the opening direction E1 of the deposition area P is above the horizontal line H, indicating that the exhaust tailpipe 4 has a slope, ensuring that the deposition area P effectively collects condensate containing carbon slag. Moreover, the opening direction E2 of the exhaust tailpipe outlet end 40 is below the horizontal line H to adjust the discharge direction of exhaust gas and carbon slag.

[0040] Please see Figure 4 Figure 4 is a partially enlarged view of the exhaust tailpipe according to the second embodiment of this utility model. As shown in the figure, the exhaust tailpipe 4' includes a front exhaust tailpipe 41', a rear exhaust tailpipe 42', and a connecting pipe 43'. The connecting pipe 43' connects the front exhaust tailpipe 41' and the rear exhaust tailpipe 42' respectively. In this embodiment, the front exhaust tailpipe 41', the rear exhaust tailpipe 42', and the connecting pipe 43' are a combined structure. Specifically, the exhaust tailpipe 4' has a recessed deposition area P'. The deposition area P' is recessed between the outer wall of the front exhaust tailpipe 41' and the inner wall of the connecting pipe 43', and the diameter D1' of the front exhaust tailpipe 41' is smaller than the diameter D2' of the rear exhaust tailpipe 42'.

[0041] The assembly method of the exhaust tailpipe of this utility model is not limited to the first and second embodiments described above. The front exhaust tailpipe and the connecting pipe can also be an integral structure. Alternatively, the front exhaust tailpipe, the rear exhaust tailpipe and the connecting pipe can also be an integral structure.

[0042] With the above design, when carbon slag condensate is generated in the engine exhaust device 1 and is ejected by the exhaust back pressure, the carbon slag condensate will be guided to the rear exhaust tailpipes 42 and 42' when passing through the exhaust tailpipes 4 and 4'. However, because the rear exhaust tailpipes 42 and 42' have a slope, the carbon slag condensate cannot be discharged upwards and accumulates in the deposition area P and P'. Then, the high temperature generated by the engine 10 evaporates the carbon slag condensate into pure carbon slag, and it is then discharged from the muffler by the exhaust back pressure. That is, the stain phenomenon formed by carbon slag condensate flowing out along the muffler 3 will not be formed.

[0043] The above embodiments are merely illustrative examples for ease of explanation. The scope of the rights claimed by this utility model should be determined by the scope of protection claimed in the patent application documents, and not limited to the above embodiments.

Claims

1. An engine exhaust device, connected to an exhaust manifold of an engine, characterized in that, Including: An exhaust duct includes an exhaust duct inlet end and an exhaust duct outlet end, wherein the exhaust duct inlet end is connected to the exhaust passage; A muffler includes a muffler inlet end and a muffler outlet end, the muffler inlet end being connected to the exhaust duct outlet end, and the muffler outlet end being in communication with the atmosphere; and An exhaust tailpipe is housed within the muffler, guiding gas from the inlet end of the muffler through the outlet end of the exhaust tailpipe to the outlet end of the muffler. A deposition area is recessed within the exhaust tailpipe.

2. The engine exhaust device as described in claim 1, characterized in that, The exhaust tailpipe includes a front exhaust tailpipe, a rear exhaust tailpipe and a connecting pipe, which is connected to the front exhaust tailpipe and the rear exhaust tailpipe respectively.

3. The engine exhaust device as described in claim 2, characterized in that, The front exhaust tailpipe and the connecting pipe are an integral structure, the rear exhaust tailpipe and the connecting pipe are an integral structure, or the front exhaust tailpipe, the rear exhaust tailpipe and the connecting pipe are an integral structure.

4. The engine exhaust device as described in claim 2, characterized in that, The deposition zone is recessed between the outer wall of the front exhaust tailpipe and the inner wall of the connecting pipe.

5. The engine exhaust device as described in claim 2, characterized in that, The diameter of the front exhaust tailpipe is smaller than the diameter of the rear exhaust tailpipe.

6. The engine exhaust device as described in claim 1 or claim 2, characterized in that, The opening of the sedimentary zone faces upwards towards the horizontal line.

7. The engine exhaust device as described in claim 1 or claim 2, characterized in that, The exhaust tailpipe outlet opens downwards towards the horizontal.

Images