CN210509347U

CN210509347U - Exhaust system of fuel engine

Info

Publication number: CN210509347U
Application number: CN201921694694.8U
Authority: CN
Inventors: 丹尼斯·博纳; 顾鹏洲; 渊博; 奥利维尔·普拉; 于乐; 尹可
Original assignee: Faurecia Emissions Control Technologies Development Shanghai Co Ltd
Current assignee: Faurecia Emissions Control Technologies Development Shanghai Co Ltd
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-05-12
Anticipated expiration: 2029-10-11
Also published as: US20210108544A1

Abstract

The utility model provides an exhaust system of a fuel engine, which comprises a first exhaust pipe, a silencer and a second exhaust pipe, wherein the silencer is arranged between the first exhaust pipe and the second exhaust pipe, the first exhaust pipe is positioned at the upstream of the silencer, and the second exhaust pipe is positioned at the downstream of the silencer; the second exhaust pipe comprises a single exhaust pipe, one end of the single exhaust pipe is connected with the downstream end of the silencer, and a plurality of communicating holes are formed in the single exhaust pipe; or the second exhaust pipe comprises a single exhaust pipe and two exhaust pipe branches, one end of the single exhaust pipe is connected to the downstream end of the silencer, the other end of the single exhaust pipe is connected with the two exhaust pipe branches, and a plurality of communicating holes are formed in the single exhaust pipe and the two exhaust pipe branches. The utility model discloses adopt a muffler at the cold junction, can be in order to realize weakening the effect of vibration and noise. It saves the volume of the muffler, reduces the overall weight and lowers the manufacturing cost.

Description

Exhaust system of fuel engine

Technical Field

The utility model relates to the field of automobiles, in particular to fuel engine exhaust system.

Background

In the automotive field, exhaust systems are systems for controlling the emissions and noise of automobiles, which are disposed under the entire automobile chassis, connected to the engine exhaust manifold, and suspended under the floor of the vehicle body. Therefore, the shape trend of the automobile is generally complex, and the automobile is also a key part influencing the vibration and the noise of the whole automobile.

The main function of the muffler is to reduce the exhaust noise of the engine and to allow the high-temperature exhaust gas to be safely and efficiently discharged. The silencer is used as a part of an exhaust pipeline and is required to ensure smooth exhaust, small resistance and enough strength.

FIG. 1 is a schematic diagram of a prior art exhaust system of an oil engine. FIG. 2 is a front view of a prior art exhaust system for an oil engine. FIG. 3 is a perspective view of another type of prior art fuel engine exhaust system.

As shown in fig. 1 to 3, the exhaust system of the conventional oil engine generally includes at least two mufflers 20, which increases the weight of the exhaust system of the gasoline engine and requires more installation space, and the cost is greatly increased.

In view of the above, those skilled in the art have developed the structure of an exhaust system of a gasoline engine in order to overcome the above-mentioned technical problems.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome among the prior art fuel engine exhaust system installation muffler more, increased exhaust system's weight, need defects such as more installation space, provide a fuel engine exhaust system.

The utility model discloses a solve above-mentioned technical problem through following technical scheme:

the exhaust system of the fuel engine is characterized by comprising a first exhaust pipe, a silencer and a second exhaust pipe, wherein the silencer is installed between the first exhaust pipe and the second exhaust pipe, the first exhaust pipe is located at the upstream of the silencer, and the second exhaust pipe is located at the downstream of the silencer;

the second exhaust pipe comprises a single exhaust pipe, one end of the single exhaust pipe is connected with the downstream end of the silencer, and a plurality of communication holes are formed in the single exhaust pipe; or,

the second exhaust pipe comprises a single exhaust pipe and two exhaust pipe branches, one end of the single exhaust pipe is connected with the downstream end of the silencer, the other end of the single exhaust pipe is connected with the two exhaust pipe branches, and the single exhaust pipe and the two exhaust pipe branches are provided with a plurality of communicating holes.

According to the utility model discloses an embodiment, the length of second blast pipe is greater than 1 meter.

According to the utility model discloses an embodiment, the intercommunicating pore is the round hole, the total equivalent area more than or equal to diameter of round hole is 2mm, is less than the round hole that the diameter is 30 mm.

According to the utility model discloses an embodiment, the intercommunicating pore is the rectangular hole, the total equivalent area more than or equal to diameter of rectangular hole is 2mm, is less than the round hole that the diameter is 30 mm.

According to the utility model discloses an embodiment, the intercommunicating pore is the microperforation structure, the total equivalent area more than or equal to diameter of microperforation structure is 2mm, is less than the diameter and is 30 mm's round hole.

According to the utility model discloses an embodiment, be provided with outer heat shield on the intercommunicating pore, outer heat shield is closed heat shield, perhaps for being equipped with the heat shield of trompil, the total equivalent area more than or equal to diameter of trompil is 2mm, is less than the round hole that the diameter is 30 mm.

According to the utility model discloses an embodiment, be provided with helmholtz resonator on the intercommunication hole, helmholtz resonator's volume less than or equal to 1L.

According to an embodiment of the invention, the helmholtz resonator cavity takes the form of a neck sticker, neck tube or other transmission channel.

According to the utility model discloses an embodiment, still be provided with the tuning valve on the pipe on the first blast pipe.

The utility model discloses an actively advance the effect and lie in:

the utility model discloses gasoline engine exhaust system only needs to adopt a muffler at the cold junction, can be in order to realize weakening the effect of vibration and noise. At the same time, standing waves are suppressed using small holes, HHR (helmholtz resonator) and perforated plates. The exhaust system of the gasoline engine saves the volume of the silencer, lightens the whole weight and reduces the manufacturing cost.

The exhaust system of the gasoline engine adopts a long exhaust pipe, and has better acoustic performance in the range of idle speed and low rotating speed.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which like reference numerals refer to like features throughout, and in which:

FIG. 1 is a perspective view of a prior art fuel engine exhaust system of the type described.

FIG. 2 is a front view of a prior art type of exhaust system for an oil engine.

FIG. 3 is a perspective view of another type of prior art fuel engine exhaust system.

Fig. 4 is a perspective view of an embodiment of the exhaust system of the fuel engine of the present invention.

Fig. 5 is a front view of an embodiment of the exhaust system of the fuel engine of the present invention.

Fig. 6 is a perspective view of another embodiment of the gas engine exhaust system of the present invention.

Fig. 7 is a schematic diagram of a communication hole in the exhaust system of the fuel engine of the present invention.

Fig. 8 is a schematic diagram of a second communication hole in the exhaust system of the fuel engine of the present invention.

Fig. 9 is a third schematic diagram of a communication hole in the exhaust system of the fuel engine of the present invention.

Fig. 10 is a first schematic diagram of the oil-burning machine exhaust system with an external heat shield arranged in the communication hole.

Fig. 11 is a schematic diagram two of the communicating hole in the exhaust system of the fuel engine of the present invention provided with an external heat shield.

Fig. 12 is a third schematic diagram of the oil-burning machine exhaust system with an external heat shield arranged in the communication hole.

Fig. 13 is a first schematic diagram of the communicating hole in the exhaust system of the fuel engine of the present invention provided with a helmholtz resonator.

Fig. 14 is a schematic diagram of the communicating hole in the exhaust system of the fuel engine of the present invention provided with a helmholtz resonator.

Fig. 15 is a schematic diagram of the first exhaust pipe of the exhaust system of the fuel engine of the present invention provided with the tuning valve on the pipe.

Fig. 16 is a schematic diagram of the structure of the on-pipe tuning valve.

[ reference numerals ]

First exhaust pipe 10

Muffler 20

Second exhaust pipe 30

Single exhaust pipe 31

Double exhaust pipe branch 32

Communication hole 33

Outer heat shield 40

Opening 41

Helmholtz resonant Cavity 50

On-pipe tone tuning valve 60

Tube 61

Reset torsion spring 62

Partition plate 63

Maximum position p2

Initial position p1

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.

Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.

Fig. 4 is a perspective view of an embodiment of the exhaust system of the fuel engine of the present invention. Fig. 5 is a front view of an embodiment of the exhaust system of the fuel engine of the present invention.

As shown in fig. 4 and 5, the present invention discloses an exhaust system of an oil burning machine, which comprises a first exhaust pipe 10, a muffler 20 and a second exhaust pipe 30, wherein the muffler 20 is installed between the first exhaust pipe 10 and the second exhaust pipe 30, the first exhaust pipe 10 is located at the upstream of the muffler 20, and the second exhaust pipe 30 is located at the downstream of the muffler 20.

The second exhaust pipe 30 includes a single exhaust pipe 31 and a double exhaust pipe branch 32, one end of the single exhaust pipe 31 is connected to the downstream end of the muffler 20, the other end of the single exhaust pipe 31 is connected to the double exhaust pipe branch 32, and a plurality of communication holes 33 are formed in the single exhaust pipe 31 and the double exhaust pipe branch 32.

As shown in fig. 6, the second exhaust pipe 30 of the exhaust system of the oil-burning engine may include only a single exhaust pipe 31, one end of the single exhaust pipe 31 is connected to the downstream end of the muffler 20, and a plurality of communication holes 33 are opened in the single exhaust pipe 31.

Preferably, the second exhaust pipe 30 is here located at the downstream end of the muffler 20, having a length greater than 1 meter.

Fig. 7 is a schematic diagram of a communication hole in the exhaust system of the fuel engine of the present invention. Fig. 8 is a schematic diagram of a second communication hole in the exhaust system of the fuel engine of the present invention. Fig. 9 is a third schematic diagram of a communication hole in the exhaust system of the fuel engine of the present invention.

As shown in fig. 7 to 9, the communication hole 33 may be shaped in various forms, for example, the communication hole 33 is preferably a circular hole having a total equivalent area of 2mm or more in diameter and 30mm or less in diameter. Alternatively, the communication hole 33 is preferably a rectangular hole or a prolate elliptical hole having a total equivalent area of 2mm or more in diameter and less than a circular hole having a diameter of 30 mm. Still alternatively, the communication holes 33 are preferably of a micro-perforated structure having a total equivalent area of 2mm or more in diameter and less than a circular hole of 30mm in diameter.

Fig. 10 is a first schematic diagram of the oil-burning machine exhaust system with an external heat shield arranged in the communication hole. Fig. 11 is a schematic diagram two of the communicating hole in the exhaust system of the fuel engine of the present invention provided with an external heat shield. Fig. 12 is a third schematic diagram of the oil-burning machine exhaust system with an external heat shield arranged in the communication hole.

As shown in fig. 10 to 12, in particular, an outer heat shield 40 may be preferably provided on the communication hole 33, and the outer heat shield 40 may be a closed heat shield or a heat shield having openings 41 whose total equivalent area is equal to or larger than a circular hole having a diameter of 2mm and smaller than a circular hole having a diameter of 30 mm.

The outer heat shield 40 may be provided with one opening 41 or a plurality of openings 41 may be uniformly distributed around the outer heat shield. The closed heat shield may also be provided with glass wool to avoid an unexpected leakage of the closed heat shield.

Fig. 13 is a first schematic diagram of the communicating hole in the exhaust system of the fuel engine of the present invention provided with a helmholtz resonator. Fig. 14 is a schematic diagram of the communicating hole in the exhaust system of the fuel engine of the present invention provided with a helmholtz resonator.

As shown in fig. 13 and 14, it is further preferable that the communication hole 33 is further provided with a helmholtz resonator 50, and a volume of the helmholtz resonator 50 is 1L or less. The area of the communication hole 33 is not more than the area of a circular hole having a diameter of 20 mm.

The helmholtz resonator 50 may take the form of a neck patch, neck tube, or other transmission channel. The neck patch equivalent area of the internal conveying channel is less than or equal to the area of a circular ring with the diameter of 15 mm. The equivalent area of the neck pipe of the internal conveying channel is less than or equal to the area of a circular ring with the diameter of 15 mm.

Or the transmission channel can be constructed by other metal plates, and the equivalent area of the transmission channel is less than or equal to the area of a circular ring with the diameter of 15 mm.

Fig. 15 is a schematic diagram of the first exhaust pipe of the exhaust system of the fuel engine of the present invention provided with the tuning valve on the pipe. Fig. 16 is a schematic diagram of the structure of the on-pipe tuning valve.

As shown in fig. 15 and 16, the first exhaust pipe 10 is further provided with an on-pipe tuning valve 60. The flow of fluid is regulated, directed or controlled by opening, closing or partially blocking various channels. Such a device may improve the noise sequence by adjusting the back pressure of the exhaust system.

The on-pipe tuning valve 60 comprises a pipe body 61, at least one rotating shaft (not shown), a return torsion spring 62 and a partition 63 connected to the rotating shaft, wherein the air flow can push the partition 63 to rotate to a corresponding position around the rotating shaft, the air flow is maximally rotated to a maximum position p2, and the partition is reset to an initial position p1 when the air flow is small or zero.

To sum up, the utility model discloses gasoline engine exhaust system only needs to adopt a muffler at the cold junction, can be in order to realize weakening the effect of vibration and noise. The exhaust system of the gasoline engine saves the volume of the silencer, lightens the whole weight and reduces the manufacturing cost.

Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are all within the scope of the invention.

Claims

1. An exhaust system of an oil engine is characterized by comprising a first exhaust pipe, a silencer and a second exhaust pipe, wherein the silencer is installed between the first exhaust pipe and the second exhaust pipe, the first exhaust pipe is located at the upstream of the silencer, and the second exhaust pipe is located at the downstream of the silencer;

2. The oil engine exhaust system according to claim 1, wherein said second exhaust pipe has a length greater than 1 meter.

3. The exhaust system of the oil engine as claimed in claim 1, wherein said communication holes are circular holes having a total equivalent area of 2mm or more in diameter and 30mm or less in diameter.

4. The exhaust system of the oil engine according to claim 1, wherein said communication holes are rectangular holes having a total equivalent area of 2mm or more in diameter and 30mm or less in diameter.

5. The exhaust system of the oil engine as claimed in claim 1, wherein said communication holes are of a micro-perforated structure having a total equivalent area greater than or equal to a circular hole of 2mm diameter and less than 30mm diameter.

6. The exhaust system of the oil engine according to claim 1, wherein an outer heat shield is provided on the communication hole, and the outer heat shield is a closed heat shield or a heat shield provided with an opening, and the total equivalent area of the opening is greater than or equal to a circular hole with a diameter of 2mm and less than 30 mm.

7. The oil engine exhaust system according to claim 1, wherein a helmholtz resonator is provided in said communication hole, and a volume of said helmholtz resonator is 1L or less.

8. The oil engine exhaust system according to claim 7, wherein said helmholtz resonator cavity is in the form of a neck sticker, neck tube or other transfer channel.

9. The oil engine exhaust system according to claim 1, wherein the first exhaust pipe is further provided with an on-pipe tuning valve.