CN201140750Y

CN201140750Y - Motorcycle

Info

Publication number: CN201140750Y
Application number: CNU2007200594556U
Authority: CN
Inventors: 李国良
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-13
Filing date: 2007-11-13
Publication date: 2008-10-29
Anticipated expiration: 2017-11-13

Abstract

The utility model relates to a motorcycle on which is provided with a dissipative muffler. The dissipative muffler comprises a leading-in pipe, a leading-in pipe cover, a casing, baffles, an insert pipe, a tail pipe, a tail pipe cap, a tail cover and a tail ring, wherein the inner portion of the dissipative muffler is divided into a plurality of expanded cavities by the baffles, double resonant cavities are respective arranged in each expanded cavity, and the expanded cavities and the resonant cavities are mutually communicated. The utility model adopts the double resonant cavities structure, and weakens some noise peak frequencies to effectively reduce the exhaust noise of the motorcycle.

Description

A kind of motor bike

Technical field

The utility model relates to a kind of motor bike, particularly a kind of motor bike that has noise silencer.

Background technology

The self-propelled vehicle noise is the important source of city noise public hazards, also is one of major control object of efforts at environmental protection.In order to reduce the self-propelled vehicle noise emission, each state has all formulated strict rules the vehicle noise that comprises motor bike has been limited.In China, the homemade motor bike of considerable part will can not be up to standard and delisting owing to noise level.Trace it to its cause, except the design of driving engine and build guality were not high, the noise silencer inner structure is unreasonable also to be a very important reason.The conventional design of the noise silencer of homemade motor bike is to adopt multistage expansion cavity structure, and promptly waste gas, is discharged via tail pipe successively by expansion cavity 1, expansion cavity 2, expansion cavity 3 at last from ingress pipe.The characteristics of this structure are frequency of noise elimination section broads, but the sound deadening capacity deficiency can not decay at some noise peak frequency, so the effect of can not being eliminated the noise preferably simultaneously.

Summary of the invention

Defective for the noise elimination poor effect of the motor bike that solves prior art, the utility model provides a kind of motor bike, it is characterized in that motor bike is provided with noise silencer, and noise silencer adopts the dual resonant cavity structure, decay at some noise peak frequency, can reduce exhaust roar preferably; Simultaneously, first resonant cavity is positioned at whole noise silencer foremost, forms preposition cavity resonator structure, can effectively suppress the suppressor case vibration noise.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of motor bike, it is characterized in that motor bike is provided with noise silencer, noise silencer comprises ingress pipe, ingress pipe lid, housing, dividing plate, tubular stinger, tail pipe, tail-hood and tail circle, this noise silencer has been divided into a plurality of expansion cavities to its inside by a plurality of dividing plates, set up resonant cavity respectively in two expansion cavities therein, and expansion cavity and the resonant cavity set up are intercommunications.During the motor bike running, waste gas at first enters first expansion cavity after ingress pipe enters noise silencer, in this chamber, the part acoustic energy because volume expansion can decay, simultaneously, part gas enters first resonant cavity and exchanges with gas in this chamber, constitutes resonator system.Because this system is in whole acoustic wave filter structure foremost, resonant cavity and expansion cavity constitute the forward type cavity resonator structure, can effectively suppress the suppressor case vibration noise like this.

Gas directly enters second expansion cavity by tubular stinger again after flowing through first expansion cavity.The gas cubic expansion and the part acoustic energy of decaying once more in this chamber, and then enter in the 3rd expansion cavity and second resonant cavity, the resonator system that constitutes by these two chambeies part acoustic energy of can decaying again by tubular stinger.At last, gas is discharged by tail pipe, and acoustic energy is significantly reduced.

In order to prove the beneficial effects of the utility model, this utility model is used for testing on the motor bike, test result is as follows:

Car number	Former car is by noise dB (A)	Improve the back by noise dB (A)
Car number	Former car is by noise dB (A)	Improve the back by noise dB (A)	1	78.6	78.3
2	78.1	77.9	1	78.6	78.3
2	78.1	77.9	3	77.3	76.8

Improvement effect: car load has reduced 0.2dB (A)～0.5dB (A) by noise.

Description of drawings

Fig. 1 is the constructional drawing of noise silencer of the present utility model.

Fig. 2 is the working process scheme drawing of the embodiment of noise silencer of the present utility model.

The specific embodiment

Referring to Fig. 1, Fig. 2, a kind of motor bike, this motor bike is provided with noise silencer, this noise silencer comprises ingress pipe 1, ingress pipe lid 5, housing 2, dividing

plate

3,6,8,12,

tubular stinger

4,7,9,11, tail pipe 13, tail pipe capping 10, tail-hood 14 and tail circle 15, this noise silencer has been divided into a plurality of expansion cavities to its inside by a plurality of dividing plates, resonant cavity 16 resonant cavity 20 in described

expansion cavity

17,19, have been set up respectively, and described expansion cavity 17 is intercommunications with resonant cavity 16, and described expansion cavity 19 is intercommunications with resonant cavity 20.Described dividing plate 3 separates expansion cavity 17 resonant cavity 16, and dividing plate 3 is provided with tubular stinger 4; Described dividing plate 8 separates expansion cavity 19 and resonant cavity 20, and dividing plate 8 is provided with tubular stinger 9; Described dividing

plate

6,8,12 is provided with tubular stinger 7; Described dividing plate 12 is between expansion cavity 18 and expansion cavity 19, and described tubular stinger 11 and tail pipe 13 are positioned on the dividing plate 12.

Claims

1, a kind of motor bike, it is characterized in that motor bike is provided with noise silencer on one's body, this noise silencer comprises ingress pipe (1), ingress pipe lid (5), housing (2), dividing plate, tubular stinger, tail pipe (13), tail-hood (14) and tail circle (15), this noise silencer has been divided into a plurality of expansion cavities to its inside by a plurality of dividing plates, it is characterized in that: in described expansion cavity (17,19), set up resonant cavity (16) resonant cavity (20) respectively, and described expansion cavity (17) is intercommunication with resonant cavity (16), and described expansion cavity (19) is intercommunication with resonant cavity (20).

2, motor bike according to claim 1 is characterized in that: described dividing plate (3) is separated expansion cavity (17) resonant cavity (16), and described tubular stinger (4) is positioned on the dividing plate (3).

3, motor bike according to claim 2 is characterized in that: described dividing plate (8) is separated expansion cavity (19) resonant cavity (20), and described tubular stinger (9) is positioned on the dividing plate (8).

4, motor bike according to claim 3 is characterized in that: described dividing plate (6,8,12) is provided with tubular stinger (7).

5, motor bike according to claim 4 is characterized in that: described dividing plate (12) is positioned between expansion cavity (18) and the expansion cavity (19), and described tubular stinger (11) and tail pipe (13) are positioned on the dividing plate (12).