CN221053787U

CN221053787U - Exhaust silencing variable system of internal combustion engine

Info

Publication number: CN221053787U
Application number: CN202322629410.XU
Authority: CN
Inventors: 王德宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-09-26
Filing date: 2023-09-26
Publication date: 2024-05-31
Anticipated expiration: 2033-09-26

Abstract

The utility model discloses an exhaust silencing variable system of an internal combustion engine, which comprises a silencer main body, wherein a silencing cavity is arranged in the silencer main body, silencing cavities from upstream to downstream are communicated one by one through a silencing pipe, tail pipes are arranged in the silencer main body and transversely span the silencing cavities, and a blocking cover device is arranged in the silencer main body; when the tail pipe is plugged with the blocking cover device, the gas exhausted by the internal combustion engine flows through all the silencing cavities from the upstream to the downstream and then enters the tail pipe to be exhausted to the atmosphere, so that the silencing effect is optimal; when the magnetic device adsorbs the movable baffle to open the inlet of the tail pipe, the gas exhausted by the internal combustion engine directly enters the tail pipe and is exhausted to the atmosphere, so that different silencing effects are realized and power is improved.

Description

Exhaust silencing variable system of internal combustion engine

Technical Field

The present utility model relates to an exhaust muffling variable system of an internal combustion engine.

Background

The high-temperature and high-pressure gas discharged by the internal combustion engine during operation can be discharged into the atmosphere through the exhaust muffler; the main function of the muffler is to reduce the influence of exhaust noise on the environment and people, so that the muffler meets the national noise regulation requirement. Because of the pressure difference of the exhaust gas, the exhaust gas of the internal combustion engine enters the muffler through the exhaust pipe and then flows through the silencing chamber and the silencing pipe in sequence according to the arrangement sequence of the silencing chamber and the silencing pipe formed by the internal structure, and finally is discharged into the atmosphere through the tail pipe; in the flowing process of the exhaust gas, the high-pressure gas expands, contracts, reflects for many times because the exhaust gas passes through the silencing pipes and the silencing chambers, and the energy and noise of the exhaust gas are continuously consumed, absorbed and attenuated, so that the silencing effect is achieved. As shown in patent CN201811529829.5, the internal structure of the muffler is fixed, i.e. the internal multiple silencing chambers and silencing pipes are all formed and fixed by welding, so that the gas flowing through the muffler will not change during use, and the gas will be sequentially expanded and diffused step by step to finally exit the muffler from the set silencing pipes and silencing chambers, so that the silencing effect is constant, and the exhaust back pressure value (exhaust resistance) is fixed, and the output power performance of the engine matched with the muffler will not change.

In the prior art, there are mufflers capable of changing the airflow path, as shown in patent CN201780017310.6, but many complicated electronic control systems are used, and special throttle bodies, wires, circuit control systems and the like are provided, so that the arrangement space is large, the structure is complex, and the cost is high.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides an exhaust silencing variable system of an internal combustion engine.

The technical scheme adopted for solving the technical problems is as follows:

The exhaust silencing variable system of the internal combustion engine comprises a silencer main body, wherein the inner cavity of the silencer main body is divided into two or more silencing cavities by a cavity partition board, silencing pipes are supported on the cavity partition board, two ends of each silencing pipe are respectively communicated with different silencing cavities, so that the silencing cavities from upstream to downstream are communicated one by one, tail pipes are arranged in the silencer main body, the tail pipes are arranged across the silencing cavities from upstream to downstream, one end of each tail pipe is an inlet communicated with an upstream initial silencing cavity, the other end of each tail pipe is an outlet communicated with the outside of the silencer main body, and a tail pipe positioned at the tail end of the downstream is provided with a vent; a blocking cover device is arranged in the upstream initial silencing cavity to cover or open the inlet of the tail pipe; the baffle cover device comprises a movable baffle plate and a magnetic device for driving the movable baffle plate, wherein the movable baffle plate is made of a material capable of being adsorbed by magnetic force, and the inlet of the tail pipe is opened by the magnetic force adsorption of the magnetic device;

When the cover blocking device covers the inlet of the tail pipe, gas exhausted by the internal combustion engine flows through all the silencing cavities from the upstream to the downstream, then enters the tail pipe from the vent and is exhausted to the atmosphere through the outlet;

When the blocking cover device opens the inlet of the tail pipe, gas discharged by the internal combustion engine enters the upstream initial silencing cavity, enters the tail pipe through the inlet and is directly discharged to the atmosphere through the outlet.

The magnetic device is disposed on an outer sidewall of the muffler body.

The silencer is characterized in that an installation position of a magnetic device is arranged on the outer side wall of the silencer main body, the magnetic device is a permanent magnet, and the magnetic device is detachably installed on the installation position.

The magnetic device is an electromagnet.

And an installation seat for rotatably installing the movable baffle is arranged at the inlet of the tail pipe.

The silencer main body forms three silencing cavities through two cavity partition boards, a silencing cavity A, B, C is formed from upstream to downstream in sequence, the silencing cavity A is an initial silencing cavity at upstream and is communicated with a silencing cavity B through a silencing pipe I, the silencing cavity B is communicated with a silencing cavity C through a silencing pipe II, the silencing cavity C is a silencing cavity at the tail end of downstream, and the tail pipe spans across the silencing cavity A, B, C.

The upstream initial muffler chamber has a wall surface that gradually narrows toward the air flow inlet end to form a tapered wall surface.

The beneficial effects of the utility model are as follows: when the tail pipe is plugged with the baffle cover device, the gas exhausted by the internal combustion engine flows through all the silencing cavities from the upstream to the downstream, then enters the tail pipe from the vent hole and is exhausted to the atmosphere through the outlet, and the silencing effect is optimal; when the magnetic field of the magnetic device covers the movable baffle, after the inlet of the tail pipe is adsorbed and opened, gas discharged by the internal combustion engine enters the upstream initial silencing cavity, enters the tail pipe through the inlet and is directly discharged to the atmosphere through the outlet, so that different silencing effects are realized, namely different sound quality effects are generated, and the requirements of different users are met; simultaneously, the back pressure of the exhaust gas can be reduced, so that the exhaust gas is smoother, and the power of the engine is improved; the utility model skillfully utilizes magnetic force adsorption to control the opening or closing of the movable baffle, does not need a complex adjusting and controlling mechanism, has simple structure, is easy to realize, has low cost, can realize different exhaust sound effects and dynamic performances under different environments or working conditions, and brings more pleasant driving feeling to drivers.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic illustration of the present utility model with the tailpipe inlet closed;

Fig. 2 is a schematic view of the present utility model with the tailpipe inlet open.

Reference numerals:

1-muffler body, 2-tailpipe, 21-inlet, 22-outlet, 23-vent, 24-mount, 3-chamber partition, 4-flapper, 5-magnetic device, 6-muffler pipe I, 7-muffler pipe II, 9-internal combustion engine.

Detailed Description

Referring to fig. 1 and 2, an exhaust silencing variable system of an internal combustion engine comprises a silencer main body 1, wherein the inner cavity of the silencer main body 1 is divided into two or more silencing cavities by a cavity partition plate 3, a silencing pipe is supported on the cavity partition plate 3, two ends of the silencing pipe are respectively communicated with different silencing cavities, and the silencing cavities from upstream to downstream are respectively communicated.

A tail pipe 2 is arranged in the muffler main body 1, the tail pipe 2 spans from upstream to downstream, one end of the tail pipe 2 is provided with an inlet 21 communicated with the upstream initial silencing cavity, the other end of the tail pipe 2 is provided with an outlet 22 penetrating out of the muffler main body 1 and communicated with the outside, and the tail pipe 2 positioned at the downstream end is provided with a vent 23.

An inlet 21 for closing or opening the tail pipe 2 is arranged in the upstream initial silencing cavity; the cover blocking device comprises a movable baffle plate 4 and a magnetic device 5 for driving the movable baffle plate 4, wherein the movable baffle plate 4 is made of a material which can be absorbed by magnetic force, and the inlet 21 of the tail pipe 2 is opened by the magnetic force absorption of the magnetic device 5;

when the cover blocking device covers the inlet 21 of the tail pipe 2, the gas exhausted by the internal combustion engine 9 flows through all the silencing cavities from the upstream to the downstream, then enters the tail pipe 2 from the air vent 23 and is exhausted to the atmosphere through the outlet 22, and the silencing effect is optimal;

When the cover blocking device opens the inlet 21 of the tail pipe 2, the gas discharged by the internal combustion engine 9 enters the upstream initial silencing cavity, then enters the tail pipe through the inlet 21 and is directly discharged to the atmosphere through the outlet 22, so that different silencing effects are realized, namely different sound quality effects are generated, and the requirements of different users are met; and simultaneously, the back pressure of the exhaust gas can be reduced, so that the exhaust gas is smoother, and the power of the engine is improved.

As a preferred embodiment of the present utility model, the magnetic means 5 is disposed on the outer sidewall of the muffler body 1, which is advantageous in that the arrangement of the magnetic means 5 is simplified in structure and convenient in operation control.

The magnetic means 5 have various schemes arranged to control the switching of the open or closed state of the flapper. The following description of the specific scheme is given by way of example:

As a first embodiment of the magnetic device 5, the magnetic device 5 is a permanent magnet, the installation position of the magnetic device 5 is provided on the outer side wall of the muffler main body 1, the magnetic device 5 is detachably installed on the installation position by using a manual or driving mechanism, when the magnetic device 5 is installed on the installation position, the movable baffle 4 is attracted by magnetic force to move and open the inlet 21 of the tail pipe 2, and when the magnetic device 5 leaves the installation position, the movable baffle 4 is reset under the action of self gravity to re-close the inlet 21 of the tail pipe 2.

As a second embodiment of the magnetic device 5, the embodiment shown in the drawings is also provided, the magnetic device 5 is an electromagnet and is fixedly mounted on the muffler main body 1, the magnetic device 5 is electrically connected with a circuit control system of the vehicle body, when the magnetic device 5 is electrified, magnetic attraction force is generated, and then the movable baffle 4 is adsorbed to move to open the inlet 21 of the tail pipe 2, the magnetic force disappears after the power is cut off, and the movable baffle 4 resets to close the inlet 21 of the tail pipe 2 again under the action of self gravity.

As a preferred scheme, the movable baffle 4 is movably arranged on the tail pipe 2, the arrangement of the movable baffle 4 is completed while the tail pipe 2 is arranged, the inlet 21 of the tail pipe 2 is provided with a mounting seat 24 for rotatably mounting the movable baffle 4, and the movable baffle 4 turns around the rotating shaft of the mounting seat 24 to realize the opening and closing of the inlet 21.

Preferably, the muffler body 1 forms three silencing cavities through two cavity partition boards 3, a silencing cavity A, B, C is sequentially formed from upstream to downstream, the silencing cavity A is an initial silencing cavity at upstream and is communicated with a silencing cavity B through a silencing pipe I6, the silencing cavity B is communicated with a silencing cavity C through a silencing pipe II 7, the silencing cavity C is a silencing cavity at the tail end at the downstream, and the tail pipe 2 spans across the silencing cavity A, C, B. Of course, the muffler body 1 can be provided with more chamber separators 3 to form more silencing chambers to achieve better silencing effect, and the silencing chambers and the silencing pipes can be mutually matched to form different structural forms.

Further, the upstream initial silencing cavity, namely the wall surface of the silencing cavity A, gradually narrows towards the air flow inlet end to form a conical wall surface, so that on one hand, diffusion of air is facilitated after air intake is conducted, air intake noise is reduced, and on the other hand, the conical outer side wall is also beneficial to the arrangement of the silencer main body 1 closer to the internal combustion engine 9, and pipeline arrangement is reduced.

The utility model skillfully utilizes magnetic force adsorption to control the opening or closing of the movable baffle, does not need a complex adjusting and controlling mechanism, has simple structure, is easy to realize, has low cost, can realize different exhaust sound effects and dynamic performances under different environments or working conditions, and brings more pleasant driving feeling to drivers.

Claims

1. The utility model provides an exhaust sound attenuation variable system of internal combustion engine, includes silencer main part (1), and silencer main part (1) inner chamber is separated into two or more than two amortization chambeies by cavity baffle (3), has supported the amortization pipe on cavity baffle (3), the amortization pipe both ends communicate different amortization chambeies respectively, make the amortization chamber of upstream to low reaches communicate one by one, its characterized in that: a tail pipe (2) is arranged in the muffler main body (1), the tail pipe (2) spans from upstream to downstream, one end of the tail pipe (2) is an inlet (21) communicated with an upstream initial silencing cavity, the other end of the tail pipe (2) is an outlet (22) penetrating out of the muffler main body (1) to be communicated with the outside, and a vent (23) is arranged on the tail pipe (2) positioned at the downstream end; an inlet (21) for covering or opening the tail pipe (2) is arranged in the upstream initial silencing cavity; the cover blocking device comprises a movable baffle plate (4) and a magnetic device (5) for driving the movable baffle plate (4), wherein the movable baffle plate (4) is made of a material which can be adsorbed by magnetic force, and an inlet (21) of the tail pipe (2) is opened by the magnetic force adsorption of the magnetic device (5);

When the blocking cover device covers the inlet (21) of the tail pipe (2), gas exhausted by the internal combustion engine (9) flows through all the silencing cavities from the upstream to the downstream, then enters the tail pipe (2) from the air vent (23) and is exhausted to the atmosphere through the outlet (22);

When the blocking cover device opens the inlet (21) of the tail pipe (2), gas discharged by the internal combustion engine (9) enters the upstream initial silencing cavity, enters the tail pipe through the inlet (21) and is directly discharged to the atmosphere through the outlet (22).

2. The exhaust muffling variable system of claim 1, wherein: the magnetic means (5) are arranged on the outer side wall of the muffler body (1).

3. The exhaust muffling variable system of claim 2, wherein: the silencer is characterized in that an installation position of a magnetic device (5) is arranged on the outer side wall of the silencer main body (1), the magnetic device (5) is a permanent magnet, and the magnetic device (5) is detachably installed on the installation position.

4. The exhaust muffling variable system of claim 1 or 2, wherein: the magnetic device (5) is an electromagnet.

5. The exhaust muffling variable system of claim 1, wherein: an installation seat (24) for rotatably installing the movable baffle (4) is arranged at the inlet (21) of the tail pipe (2).

6. The exhaust muffling variable system of claim 1, wherein: the silencer main body (1) forms three silencing cavities through two cavity partition boards (3), a silencing cavity A, B, C is formed from upstream to downstream in sequence, a silencing cavity A is an upstream initial silencing cavity which is communicated with a silencing cavity B through a silencing pipe I (6), the silencing cavity B is communicated with a silencing cavity C through a silencing pipe II (7), the silencing cavity C is a downstream end silencing cavity, and the tail pipe (2) stretches across the silencing cavity A, B, C.

7. The exhaust muffling variable system of claim 1 or 6, wherein: the upstream initial muffler chamber has a wall surface that gradually narrows toward the air flow inlet end to form a tapered wall surface.