CN2160758Y

CN2160758Y - Exhausting and silencing apparatus for motorcycle

Info

Publication number: CN2160758Y
Application number: CN93217759U
Authority: CN
Inventors: 李明俊; 匡宇文; 彭希仁; 顾新; 聂小林; 王�琦
Original assignee: NANCHANG AVIATION INDUSTRY COLLEGE
Current assignee: NANCHANG AVIATION INDUSTRY COLLEGE
Priority date: 1993-07-03
Filing date: 1993-07-03
Publication date: 1994-04-06
Anticipated expiration: 2003-07-03

Abstract

The utility model provides an exhausting and silencing device for a motorcycle. The exhausting and silencing device for a motorcycle comprises an exhaust bent pipe and an exhaust muffler. The utility model is characterized in that the fitment of a motorcycle is composed of two exhaust bent pipes and one exhaust muffler. The exhaust bent pipes and the exhaust muffler are connected through one integral triplet. The acceleration noise of the whole motorcycle can be decreased below 83 db through the exhaust muffling device for a motorcycle with a double-exhaust engine, particularly for a motorcycle with great power. The power loss of the engine and oil consumption are not increased. The utility model which is the ideal device for solving the problem of noise standard of the motorcycle with great power has the advantages of simple structure, low cost, good manufacturability, and convenient installation and maintenance.

Description

Exhausting and silencing apparatus for motorcycle

The utility model belongs to vehicle motor noise control technique field, is specifically related to a kind of motorcycle engine air exhaust muffler device.

Both at home and abroad to the exhaust sound control of motorcycle engine, design has various types of exhaust silencers, for example Chinese patent CN2053244U, GG87214205, CN2057699U at present.But to the acceleration noise control of the motorcycle of high power engine (is 23.9KW as 32 horsepowers), prior art still is difficult to up to standard.In existing above-mentioned silencing apparatus, a kind of is that internal structure adopts collapsible tube, throttle pipe and perforated pipe composite structure, and it is primarily aimed at and reduces motorcycle at low speed or the exhaust sound when at the uniform velocity travelling, yet acceleration noise is than at the uniform velocity noise is much bigger, and more difficult control; Another kind is from changing the gas port sectional area of engine charge valve body, cylinder body exhaust phase place and exhaust sectional area thereof and baffler are started with and are improved power, reduce oil consumption, this is effective to the small-power Light-duty Vehicle, but can't satisfy the noise reduction requirement of high-power car, the preposition connection boxlike of the employing silencer that also has, back segment master silencer adopts horizontal filter core dividing plate, composite structures such as sound-absorbing material, better noise reduction is arranged, but complex structure, the blocking of sound-absorbing material moisture-sensitive, influence working life, and when being used for high-power motorcycles such as 32 horsepowers, its acceleration noise still can be higher than the permission standard of 84db.Therefore, to the motorcycle of homemade high power engine, one of its noise reduction important topic that is still motorcycle industry up to standard.

The purpose of this utility model is to provide a kind of novel exhaust silencer that is used for further reducing high-power Finished Motorcycle of motorcycle acceleration noise, makes it simple in structure, excellent noise reduction effect, and long service life, and do not increase engine power loss and oil consumption.

The utility model is achieved in that

This motor exhaust silencer comprises exhaust elbow and exhaust silencer, and its special way is that it has two exhaust elbows and an exhaust silencer, between exhaust elbow and exhaust silencer, converges the threeway member by one and connects.

This motor exhaust silencer converge the threeway member, insert a tapered channels pipe by two convergence tubes and form, also can be included in the attached transition connecting tube of tapered channels Guan Houzai.

This motor exhaust silencer converge the threeway member, its two convergence tubes are parallel mutually, and outlet end is incorgruous angular cut.

The exhaust silencer of this motor exhaust silencer without sound-absorbing material and perforated screen, and adopts two-tube shunting interpolation pipe expansion chamber structure twice.

Effect of the present utility model is fairly obvious, experimental results show that, it can make the motorcycle acceleration noise of high-power (is 23.9KW as 32 horsepowers) motor reduce to below the 83db, up to standard having a surplus, and simple in structure, cost of production is low, preparation process is good, installation and maintenance are convenient, long service life, not increasing engine power loss and oil consumption, is the desirable device of the further noise reduction of high-power motorcycle.

Below in conjunction with drawings and Examples the utility model is further described.

Accompanying drawing 1 is a motor exhaust silencer schematic representation of the present utility model;

Accompanying drawing 2 be air exhaust muffler device converge the three-port structure cross-sectional schematic;

Accompanying drawing 3 is exhaust silencer structural representations of air exhaust muffler device;

Accompanying drawing 4 is exhaust silencer A-A sectional views;

Accompanying drawing 5 is exhaust silencer B-B sectional views.

Embodiment:

In the accompanying drawing 1, two outlet pipes (1), converge threeway member (2), be connected successively and constitute exhaust muffler for motorcycle of the present utility model, wherein converge threeway member (2) afterbody also with transition connecting tube (2c) with exhaust silencer (3).In accompanying drawing 1, accompanying drawing 2, two exhaust elbows (1) are respectively the plane bend pipe, be in the tapered plane of symmetry separately, front end is used to be installed in double gas exhaust opening of engine, the rear end is connected with the convergence tube that converges threeway member (2) (2a), two convergence tubes (2a) that converge threeway member (2) are parallel mutually, outlet end has incorgruous angular cut, they insert tapered channels pipe (2b), tapered channels pipe (2b) afterbody is connected to transition connecting tube (2c), and is connected with exhaust silencer (3) by it.By accompanying drawing 3, accompanying drawing 4, in the accompanying drawing 5, the shell (3a) of exhaust silencer (3) is made of awl section urceolus and shell of column urceolus two-part, its awl section inner chamber is equipped with by cooperating takes over (3b), position-limiting tube (3c) and location enforced loop plane (3d) be the interpolation pipe structure of affixed composition successively, cooperate the port of adapter (3b) and the port of shell (3a) closely to fix as one, location enforced loop plane (3d) center drilling is connected with the rear end of position-limiting tube (3b), and ring flat-plate (3d) is gone up hoop and is punched, it in the shell of column inner chamber of exhaust silencer (3) twice two-tube shunt structure (K), its concrete structure is: be mounted with promptly preceding expansion chamber dividing plate (3e) of two parallel baffles and back expansion chamber dividing plate (3h) in the inner chamber, before two shunting interpolation pipes (3f) are all assigned and are passed through, back expansion chamber dividing plate (3c, 3h) partial two the shunting interpolation pipes (3g) all assign and by the back expansion chamber dividing plate (3h), one end of tailpipe (3i) assigns into the center of back expansion chamber dividing plate (3h), the affixed and ear end face center hole by muffler shell (3a) of the other end.

During this air exhaust muffler device work, the high temperature and high speed exhaust airstream enters from two exhaust elbows (1), enter exhaust silencer (3) and converge threeway member (2) and significantly reduced combined gas streams turbulence and the caused structural vibration thereof under the accelerating mode through converging threeway member (2), air-flow is converged gently, exhaust back pressure is low, the air-flow regenerated noise is little, and the structural vibration radiated noise is also little, after air-flow flows into exhaust silencer (3), through one-level expansion chamber I, behind secondary expansion chamber II and three resistance filtering of the three grades of expansion chamber III noise elimination noise reduction, through tailpipe (3i) exhaust atmosphere, one-level two shunting interpolation pipes (3f) and the second level two shunting interpolation pipes (3g) play the effect that increases divergence ratio and reduce airspeed in the insertion tube, buffering usefulness is played in air-flow turbulence during simultaneously to acceleration, thereby has solved the problem of the acceleration noise of unmanageable high-power motorcycle with open-and-shut exhausting silencer system structure.

Claims

1, a kind of motor exhaust silencer, comprise exhaust elbow and exhaust silencer, it is characterized in that: it has two exhaust elbows (1) and an exhaust silencer (3), between exhaust elbow (1) and exhaust silencer (3), converges threeway member (2) by one and connects.

2, air exhaust muffler device according to claim 1 is characterized in that: the described threeway member (2) that converges is made up of two convergence tubes (2a) tapered channels pipes of insertion (2b).

3, air exhaust muffler device according to claim 2 is characterized in that: described two convergence tubes (2a) that converge threeway member (2) walk abreast mutually, and outlet end is incorgruous angular cut.

4, air exhaust muffler device according to claim 1 is characterized in that: described exhaust silencer (3) is the silencing apparatus with twice two-tube shunt structure K.