CN220929516U - Motorcycle - Google Patents

Abstract

The utility model relates to a motorcycle, which comprises a catalyst, a cylinder body and an exhaust pipe, wherein a plurality of pipelines are sequentially arranged in the cylinder body from back to front, one end of the catalyst is communicated with the pipelines through a shunt pipe, the other end of the catalyst is communicated with the exhaust pipe, the cylinder body is divided into a first chamber and a second chamber through a partition plate, and central axes of the pipelines are coaxial. The cylinder is divided into two chambers by the partition plate, so that engine exhaust noise is subjected to rhythm changes of shrinkage, expansion and aggregation through the two chambers and the pipeline, low-sediment exhaust sound with layering sense is generated, a loop-free design is formed, air flow is discharged more smoothly, back pressure is low, and good output power of the engine is ensured.

Description

Motorcycle

Technical Field

The utility model relates to the technical field of motorcycles, in particular to exhaust sound quality of a motorcycle.

Background

Cruising motorcycles actually represent a recreational riding gesture, which is done because the engine tends to have a medium to low torque output. Therefore, the rider is very concerned about the exhaust sound quality of the cruising motorcycle, which is that the rider hopes that the sound is more pleasant, and the power performance of the engine can be fed back. However, at present, the sound quality of the cruising motorcycle cannot well retain original low-frequency noise and eliminate medium-high-frequency noise, the sinking characteristic is not unique enough, the purity of exhaust sound is not enough, and the sound characteristics of the sinking atmosphere of the cruising motorcycle cannot be matched.

The simple silencer structure is adopted, the sound exhausted by the engine can be modulated, the original low-frequency noise can be reserved, the middle-high frequency noise is eliminated, the exhaust noise has unique sinking characteristics, meanwhile, the purity of the exhaust sound can be ensured, the sound characteristics of the sinking and steady atmosphere of the cruising vehicle can be matched, and a customer has pleasant feeling on the exhaust sound.

Disclosure of utility model

In view of this, the utility model provides a motorcycle, which can modulate the sound discharged from the engine, can keep the original low-frequency noise and eliminate the medium-high frequency noise, and the exhaust noise has unique sinking characteristic, and can ensure the purity of the exhaust sound to match the sound characteristic of the sinking atmosphere of the cruising vehicle, so that the riding friend has pleasant feel to the exhaust sound.

The technical scheme adopted by the motorcycle is as follows:

The utility model provides a motorcycle, includes catalyst, blast pipe and two dislocation parallel arrangement's barrel, from the back to having set gradually pipeline one in the barrel, pipeline two and pipeline three, the one end of catalyst is through shunt tubes and pipeline one intercommunication, the other end and blast pipe intercommunication, the barrel passes through the baffle and divide into first cavity and second cavity, pipeline two communicates first cavity and second cavity, the volume ratio of first cavity and second cavity is approximately 1:1.

Optionally, the pipeline includes from the back to the preceding pipeline first, pipeline second and pipeline third that has set gradually, pipeline second intercommunication first cavity and second cavity, the first degree of depth that stretches into first cavity is 3/4 of first cavity length, the third degree of depth that stretches into second cavity is 1/4 of second cavity length.

Optionally, the ratio of diameters of the first, second and third pipelines is approximately 1:1:1.

Optionally, the volume ratio of the first chamber to the second chamber is approximately 1:1.

Optionally, the connection part between the first pipeline and the shunt pipe adopts a variable diameter mode, and the diameter ratio of the first pipeline to the shunt pipe ranges from 1.1 to 1.4.

Optionally, two cylinders are arranged and two cylinders are arranged in parallel in a staggered manner.

Optionally, two exhaust pipes are provided, and the two exhaust pipes are arranged in parallel.

Optionally, the barrel includes inner housing and shell body, the perforation has been seted up to the array on the inner wall of inner housing, it has the sound absorber to fill between inner housing and the shell body.

Optionally, the outer contour of the cylinder is circular.

In summary, the present utility model includes at least one of the following beneficial technical effects: the two cylinders are arranged in a staggered and parallel manner, and the cylinders are equally divided into two chambers by the partition plate, so that engine exhaust noise is subjected to shrinkage, expansion and accumulation rhythm change through the two chambers and the pipeline, and low-sediment exhaust sound with layering sense is generated; meanwhile, the arrangement of the double cylinders and the double exhaust pipes can widen the frequency range of low-order sound, enable the exhaust sound to be stable and thick, accord with the style of the cruising vehicle, and have obvious vehicle identification.

Drawings

FIG. 1 is a schematic overall structure of an embodiment of the present utility model;

FIG. 2 is a partial cross-sectional view of an embodiment of the present utility model;

fig. 3 is a muffler transfer loss trend chart of an embodiment of the present utility model.

Reference numerals illustrate: 1. a cylinder; 2. a first chamber; 3. a second chamber; 4. a first pipeline; 5. a second pipeline; 6. a third pipeline; 7. a shunt; 8. a partition plate; 9. and a sound absorbing member.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-3.

The embodiment of the utility model discloses a motorcycle.

Referring to fig. 1 and 2, a motorcycle comprises a catalyst, a cylinder 1 and an exhaust pipe, wherein a plurality of pipelines are sequentially arranged in the cylinder 1 from back to front, one end of the catalyst is communicated with the pipelines through a shunt pipe 7, the other end of the catalyst is communicated with the exhaust pipe, the cylinder 1 is divided into a first chamber 2 and a second chamber 3 through a partition plate 8, and central axes of the pipelines are coaxial. The cylinder body 1 is equally divided into two chambers by the partition plate 8, so that engine exhaust noise is subjected to rhythm changes of shrinkage, expansion and aggregation through the two chambers and pipelines, low-sediment exhaust sound with layering sense is generated, a loop-free design is formed, air flow discharge is smoother, back pressure is small, and good output power of the engine is ensured.

In the embodiment, the utility model is applied to a double-cylinder engine, two cylinders 1 are arranged in a staggered and parallel manner, and two exhaust pipes are arranged in a parallel manner to form an exhaust mode of a double tail pipe. The arrangement of the double cylinders and the double rows can widen the frequency range of low-order sound, enable the exhaust sound to be stable and thick, accord with the style of the cruising vehicle, and have obvious vehicle identification.

In other embodiments, one or more than three cylinders 1 and exhaust pipes may be provided.

In the present embodiment, the outer contour of the cylinder 1 is circular, and the overall appearance and the exhaust sound quality can be achieved.

The barrel 1 includes interior casing and shell body, and the perforation has been seted up to the array on the inner wall of interior casing, has filled sound absorbing member 9 between interior casing and the shell body, and in this embodiment, sound absorbing member 9 adopts and inhales the sound cotton, is favorable to reducing middle-high frequency exhaust noise ratio, improves sound purification, outstanding low order frequency sound ratio.

In this embodiment, the first pipeline 4, the second pipeline 5 and the third pipeline 6 are sequentially arranged from the back to the front, the second pipeline 5 is communicated with the first chamber 2 and the second chamber 3, and the volume ratio of the first chamber 2 to the second chamber 3 is approximately 1:1.

The central axes of the first pipeline 4, the second pipeline 5 and the third pipeline 6 are coaxial, and the diameter ratio of the first pipeline 4, the second pipeline 5 and the third pipeline 6 is approximately 1:1:1, a loop-free design is formed, the air flow is discharged more smoothly, the back pressure is small, and the good output power of the engine is ensured.

The depth of the first pipeline 4 extending into the first cavity 2 is 3/4 of the length of the first cavity 2, the depth of the third pipeline 6 extending into the second cavity 3 is 1/4 of the length of the second cavity 3, the output duty ratio of low-frequency sound is guaranteed, exhaust sound is enabled to be stable and thick, the cruising vehicle style is met, and the vehicle identification degree is obvious.

The gas in the catalyst flows into the first pipeline 4 through the shunt pipe 7, the shunt pipe 7 is used for carrying out shunt treatment on the gas of the engine exhaust, the flowing speed of the air flow in the muffler is reduced, the impact noise of the air flow and the friction noise of the air flow and the wall surface can be reduced, and the influence of the regeneration noise on the exhaust sound is avoided.

The connection part between the first pipeline 4 and the shunt tube 7 adopts a variable diameter mode, and the diameter ratio of the first pipeline 4 to the shunt tube 7 is in the range of 1.1-1.4. The flow smoothness of the air flow is ensured, the expansion ratio of the first chamber 2 to the first pipeline 4 can be increased, and the sound is considered.

Referring to fig. 3, according to the transmission loss performance in the figure, the transmission loss in the low frequency band below 400Hz is low, gradually increases in the range of 400Hz-1000Hz, and is the main noise reduction frequency band, so as to keep the low frequency noise ratio, eliminate the middle and high frequency noise, and make the exhaust noise have a low rhythm feel and purity.

By adopting the technical scheme, the exhaust sound can be matched with the style of the cruise vehicle, the exhaust sound has the characteristics of being distinguishable, high in purity of the exhaust sound, small in exhaust back pressure, good in dynamic property, simple in structure, simple in manufacturing process and low in processing cost, and can be scaled in structural size according to the engine displacement, so that universality is matched, and the unique exhaust sound characteristic of the cruise vehicle is formed.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (9)

1. A motorcycle, characterized in that: including catalyst, blast pipe and barrel, be provided with many pipelines in the barrel, the one end of catalyst is through shunt tubes and pipeline intercommunication, the other end and blast pipe intercommunication, the barrel passes through the baffle and divide into first cavity and second cavity, many the central axis of pipeline is coaxial.

2. A motorcycle as claimed in claim 1, wherein: the pipeline comprises a first pipeline, a second pipeline and a third pipeline which are sequentially arranged from the back to the front, the second pipeline is communicated with the first cavity and the second cavity, the depth of the first pipeline extending into the first cavity is 3/4 of the length of the first cavity, and the depth of the third pipeline extending into the second cavity is 1/4 of the length of the second cavity.

3. A motorcycle as claimed in claim 2, wherein: the diameter ratio of the first pipeline, the second pipeline and the third pipeline is approximately 1:1:1.

4. A motorcycle as claimed in claim 1, wherein: the volume ratio of the first chamber to the second chamber is approximately 1:1.

5. A motorcycle as claimed in claim 1, wherein: the connection part between the first pipeline and the shunt pipe adopts a variable diameter mode, and the diameter ratio of the first pipeline to the shunt pipe is 1.1-1.4.

6. A motorcycle as claimed in claim 1, wherein: the two cylinders are arranged in parallel in a staggered mode.

7. A motorcycle as claimed in claim 1, wherein: the exhaust pipes are arranged in parallel.

8. A motorcycle as claimed in claim 1, wherein: the cylinder comprises an inner shell and an outer shell, wherein perforations are formed in the inner wall of the inner shell in an array mode, and sound absorbing pieces are filled between the inner shell and the outer shell.

9. A motorcycle as claimed in claim 1, wherein: the outer contour of the cylinder body is round.