TW201903276A - Exhaust pipe structure for motorcycle - Google Patents

Abstract

An exhaust pipe structure for motorcycle is provided. The exhaust pipe structure includes a catalyst portion and an exhaust pipe. The exhaust pipe includes a first section and a second section. An end of the first section is connected to an engine of the motorcycle. The other end of the first section is connected to the second section. The second section extends in a semi-circular path. An end of the second section is connected to the first section, and the other end of the second section is connected to the catalyst portion.

Description

 Locomotive exhaust pipe structure  

The present invention relates to a locomotive exhaust pipe structure, and more particularly to a locomotive exhaust pipe structure that shortens the overall structural length.

The conventional locomotive hopes that the engine can provide better torque output at low and medium speeds, so the length of the front tube of the exhaust pipe will generally be designed to be longer. However, the exhaust pipe with a long length of the front pipe not only affects the appearance of the locomotive, but also affects the weight of the locomotive and reduces the handling performance of the locomotive.

In addition, in the prior art, the length of the tube before the excessively long exhaust device will cause the exhaust gas flow to be lower than the light-off temperature of the catalyst before entering the catalyst, resulting in a decrease in the effect of exhaust gas purification.

The present invention provides a locomotive exhaust pipe structure for solving the problems of the prior art, which is disposed on a locomotive and includes a catalyst portion and an exhaust pipe. The exhaust pipe includes a first pipe portion and a second pipe portion, one end of the first pipe portion is connected to one engine of the locomotive, and the other end of the first pipe portion is connected to the second pipe portion, the second pipe portion Extending along a circular arc path, one end of the second tube portion is connected to the first tube portion, and the other end of the second tube portion is connected to the catalyst portion.

In one embodiment, the locomotive exhaust pipe structure further includes an expansion chamber that directly connects the catalyst portion.

In one embodiment, the locomotive exhaust pipe structure further includes a muffler chamber and a connecting pipe, one end of the connecting pipe is connected to the expansion chamber, and the other end of the connecting pipe is connected to the muffler chamber.

In an embodiment, an airflow enters the exhaust pipe from the engine, and after the airflow passes through the first pipe portion and the second pipe portion, enters the catalyst portion, and the airflow travels in the second pipe portion. Rotate 180 degrees.

In one embodiment, the gas stream enters the expansion chamber from the catalyst portion and passes through the connection tube into the muffler chamber, the gas stream being rotated 180 degrees in the direction of travel of the expansion chamber.

In an embodiment, the muffler chamber is located below the second tube portion and corresponds to the second tube portion.

In one embodiment, the locomotive includes a rear wheel and a crankshaft center, the muffler chamber being located between the front edge of the rear wheel and the center of the crankshaft.

In one embodiment, the locomotive includes a rear rocker axle and a crankshaft center, the catalyst portion being located between the rear rocker axle and the crankshaft center.

In an embodiment, the locomotive exhaust pipe structure further includes an auxiliary catalyst unit, and the auxiliary catalyst unit is disposed at the first tube portion.

In an embodiment, the locomotive exhaust pipe structure further includes a frame, the second pipe portion includes an extended locking portion, and the extended locking portion is fixedly coupled to the frame.

Through the design of the bending of the second pipe portion according to the embodiment of the invention, the path length of the exhaust pipe can be increased in a limited space to maintain the performance output of the engine. Further, the design in which the traveling direction is rotated by 180 degrees before the airflow enters the catalyst portion can increase the temperature of the airflow and improve the exhaust gas purification effect of the catalyst portion. Further, the locomotive of the embodiment of the present invention is applied, and the center of gravity of the locomotive exhaust pipe structure is close to the center of gravity of the locomotive, whereby the handling of the locomotive can be improved.

M‧‧‧ locomotive

1‧‧‧Motorcycle exhaust pipe structure

11‧‧‧ Touching Department

12‧‧‧Exhaust pipe

121‧‧‧First Tube Department

122‧‧‧Second Department

123‧‧‧Extension lock

124‧‧‧Auxiliary Catalyst Unit

13‧‧‧Expansion room

14‧‧‧Mute room

15‧‧‧Connecting tube

16‧‧‧Atmospheric release tube

161‧‧‧Decorative cover

2‧‧‧Power System

21‧‧‧ engine

3‧‧‧ frame

91‧‧‧ front wheel

92‧‧‧ Rear wheel

921‧‧‧ leading edge

93‧‧‧Crankshaft Center

94‧‧‧Back rocker center

A‧‧‧ airflow

P‧‧‧ semi-circular path

Fig. 1 is a schematic view showing a locomotive according to an embodiment of the present invention.

Fig. 2A is a view showing the detailed structure of the locomotive exhaust pipe structure of the embodiment of the present invention.

Fig. 2B is a view showing the flow of airflow in the exhaust pipe structure of the locomotive according to the embodiment of the present invention.

Fig. 3 is a side view showing the structure of the exhaust pipe of the locomotive according to the embodiment of the present invention.

Fig. 4 is a view showing an atmospheric release tube of an embodiment of the present invention.

Fig. 5 is a view showing an extension lock portion of an embodiment of the present invention.

Fig. 6 is a view showing the structure of a locomotive exhaust pipe according to another embodiment of the present invention.

Fig. 7 is a view showing the structure of a locomotive exhaust pipe according to still another embodiment of the present invention.

Referring to Fig. 1, there is shown a schematic view of a locomotive M according to an embodiment of the present invention, including components such as a locomotive exhaust pipe structure 1, a front wheel 91, a rear wheel 92, and a power system 2.

The locomotive M includes a front section, a middle section, and a rear section. In front of the locomotive M, there are components such as a faucet, a front wheel 91, a direction light, and a keyhole. The middle part of the locomotive M is provided with components such as a power system 2, a seat cushion and a tripod. The rear part of the locomotive M is provided with components such as a taillight, a rear wheel 92, and a fender.

The faucet is used to control the traveling direction of the locomotive M, and the faucet can be equipped with functional parts, including instruments, switches, and rear view mirrors. The faucet also has a handle (including a fuel grip) and a handbrake. The user can control the steering of the faucet through the handle, adjust the throttle angle of the power system 2 through the fuel grip to control the power output, and decelerate the locomotive M through the hand brake. The main light can also be installed on the faucet, and the main light provides the main light illumination for the locomotive M.

The faucet and the front wheel 91 are interlocked by the faucet rotating shaft, whereby the angle of the front wheel 91 can be controlled by the rotating faucet, thereby controlling the traveling direction of the locomotive M.

The power system 2 connects and drives the rear wheel 92, thereby powering the locomotive M to advance the locomotive M.

Fig. 2A is a view showing the detailed structure of the locomotive exhaust pipe structure 1 of the embodiment of the present invention. Referring to Figures 1 and 2A, the locomotive exhaust pipe structure 1 includes a catalyst portion 11 and an exhaust pipe 12. In this embodiment, the number of the exhaust pipes 12 is two. However, the above disclosure does not limit the present invention, and the number of the exhaust pipes 12 may be one or three or more. The exhaust pipe 12 includes a first pipe portion 121 and a second pipe portion 122. One end of the first pipe portion 121 is connected to the engine 21 of the power system 2 (refer to FIG. 1), and the first pipe portion 121 is another One end of the second tube portion 122 is connected to the second tube portion 122. The second tube portion 122 is connected to the first tube portion 121. The other end of the second tube portion 122 is connected to the second tube portion 122. Catalyst unit 11.

Referring to FIG. 2A, in an embodiment, the locomotive exhaust pipe structure 1 further includes an expansion chamber 13 that is directly connected to the catalyst portion 11. The expansion chamber 13 is designed to primarily improve engine performance.

Referring to FIG. 2A, in an embodiment, the locomotive exhaust pipe structure 1 further includes a muffler chamber 14 and a connecting pipe 15, one end of the connecting pipe 15 is connected to the expansion chamber 13, and the other end of the connecting pipe 15 is connected to the Silencing chamber 14. The muffler chamber 14 is designed to reduce noise.

Fig. 2B is a view showing the flow of airflow in the exhaust pipe structure of the locomotive according to the embodiment of the present invention. Referring to FIG. 2B, in an embodiment, a gas stream (exhaust gas) A enters the exhaust pipe 12 from the engine, and the gas stream A passes through the first pipe portion 121 and the second pipe portion 122 and enters the catalyst. In the portion 11, the air flow A is rotated by 180 degrees in the traveling direction in the second pipe portion 122. In an embodiment, the air flow A then enters the expansion chamber 13 from the catalyst portion 11 and enters the muffler chamber 14 through the connecting pipe 15, and the air flow A is rotated 180 degrees in the traveling direction in the expansion chamber 13. . Through the above-described design in which the second tube portion 122 is curved, the path length of the exhaust pipe 12 can be increased in a limited space to maintain the performance output of the engine. Further, before the airflow A enters the catalyst portion 11, the design in which the traveling direction is rotated by 180 degrees can increase the temperature of the airflow A and improve the exhaust gas purifying effect of the catalyst portion 11.

Fig. 3 is a side view showing the structure of the exhaust pipe of the locomotive according to the embodiment of the present invention. Referring to FIG. 3, in an embodiment, the muffler chamber 14 is located below the second tube portion 122 and corresponds to the second tube portion 122. In this embodiment, the second tube portion 122 is a plastic structure that is joined to the upper and lower sides, or a structure in which metal and plastic are combined, as indicated by the bonding line 125 in FIG. The material of the first tube portion 121 may be metal. The catalyst portion 11 and the expansion chamber 13 may be a plastic structure that is joined to the top and bottom. In an embodiment, the catalyst portion 11, the second tube portion 122, and the expansion chamber 13 may be integrally formed.

In conjunction with Figures 1 and 3, in one embodiment, the locomotive M includes the rear wheel 92 and a crankshaft center 93, the muffler chamber 14 being located between the leading edge 921 of the rear wheel 92 and the crankshaft center 93. In one embodiment, the locomotive M includes a rear rocker axle 94 and the crankshaft center 93, the catalyst portion 15 being located between the rear rocker axle 94 and the crankshaft center 93. Through the foregoing design, the center of gravity of the locomotive exhaust pipe structure 1 can be brought close to the center of gravity of the locomotive M, thereby improving the handling of the locomotive M.

Referring to Fig. 4, in an embodiment, the locomotive exhaust pipe structure 1 further includes an atmospheric release pipe 16 that communicates with the muffler chamber 14. In the embodiment of the present invention, as shown in Figures 1 and 2A, the atmosphere release tube 16 may be further provided with a decorative cover 161.

Referring to FIG. 5, in an embodiment, the locomotive exhaust pipe structure 1 further includes a frame 3, the second pipe portion 122 includes at least one extended locking portion 123, and the extended locking portion 123 is fixedly coupled to the frame. Frame 3. Thereby, the locomotive exhaust pipe structure 1 can be well fixed. In an embodiment, the extension locking portion 123 is provided to the second tube portion 122 by welding or integral molding.

Referring to FIG. 6, a locomotive exhaust pipe structure according to another embodiment of the present invention is shown, wherein the locomotive exhaust pipe structure further includes an auxiliary catalyst unit 124, and the auxiliary catalyst unit 124 is disposed in the first pipe. Section 121 to provide a further air purification effect.

Referring to Fig. 7, there is shown a locomotive exhaust pipe structure according to still another embodiment of the present invention, wherein the number of exhaust pipes 12 of the locomotive exhaust pipe structure is one. In the same embodiment, the exhaust pipe 12 includes a first pipe portion 121 and a second pipe portion 122. One end of the first pipe portion 121 is connected to the engine of the power system, and the other end of the first pipe portion 121 is connected to the engine. The second tube portion 122 extends along a semicircular arc path, one end of the second tube portion 122 is connected to the first tube portion 121, and the other end of the second tube portion 122 is connected to the catalyst portion 11 .

While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and may be modified and modified without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

Claims (10)

 A locomotive exhaust pipe structure is disposed on a locomotive, comprising: a catalyst portion; and an exhaust pipe comprising a first pipe portion and a second pipe portion, one end of the first pipe portion is connected to the locomotive In one engine, the other end of the first pipe portion is connected to the second pipe portion, the second pipe portion extends along a semicircular arc path, and one end of the second pipe portion is connected to the first pipe portion, and the second pipe portion The other end is connected to the catalyst portion.    The locomotive exhaust pipe structure of claim 1, further comprising an expansion chamber directly connected to the catalyst portion.    The locomotive exhaust pipe structure according to claim 2, further comprising a muffler chamber and a connecting pipe, one end of the connecting pipe is connected to the expansion chamber, and the other end of the connecting pipe is connected to the muffler chamber.    The locomotive exhaust pipe structure according to claim 3, wherein a gas flow enters the exhaust pipe from the engine, and the airflow passes through the first pipe portion and the second pipe portion, and then enters the catalyst portion. The airflow is rotated by 180 degrees in the direction of travel within the second tubular portion.    The locomotive exhaust pipe structure according to claim 4, wherein the airflow enters the expansion chamber from the catalyst portion, and enters the muffler chamber through the connecting pipe, the flow direction of the airflow in the expansion chamber Rotate 180 degrees.    The locomotive exhaust pipe structure of claim 3, wherein the muffler chamber is located below the second pipe portion and corresponds to the second pipe portion.    The locomotive exhaust pipe structure of claim 3, wherein the locomotive includes a rear wheel and a crankshaft center, the muffler chamber being located between the front edge of the rear wheel and the center of the crankshaft.    The locomotive exhaust pipe structure of claim 3, wherein the locomotive includes a rear rocker axle and a crankshaft center, the catalyst portion being located between the rear rocker axle and the crankshaft center.    The locomotive exhaust pipe structure of claim 3, further comprising an auxiliary catalyst unit, wherein the auxiliary catalyst unit is disposed in the first tube portion.    The locomotive exhaust pipe structure of claim 3, further comprising a frame, the second pipe portion comprising an extended locking portion, the extended locking portion lockingly connecting the frame.