CN113756926A

CN113756926A - Double-channel exhaust pipe for taking gas from EGR (exhaust gas Recirculation) channel closest to supercharger

Info

Publication number: CN113756926A
Application number: CN202111152181.6A
Authority: CN
Inventors: 李壮; 张雷; 曾丽丽; 徐雪松; 兰棠洁; 刘志治
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2021-12-07

Abstract

The invention provides a double-channel exhaust pipe for taking gas from EGR (exhaust gas recirculation) of a channel closest to a supercharger, belonging to the technical field of engine exhaust gas recirculation. The two-pass exhaust pipe that takes exhaust gas from the closest passage EGR of the supercharger includes a first exhaust manifold and a second exhaust manifold. First exhaust manifold bottom is provided with first air inlet, second air inlet and third air inlet respectively, first exhaust manifold top communicates respectively that first EGR gets trachea and second EGR and gets the trachea. First exhaust manifold top adopts the binary channels EGR system that is connected with first EGR and gets trachea with second EGR, in order to match with the binary channels EGR valve, and engine exhaust pipe comprises 1 ~ 3 jar exhaust manifold and 4 ~ 6 jar exhaust manifold, respectively has 1 EGR to get the entry that the gas port corresponds the binary channels EGR valve respectively. The EGR gas taking port is arranged at the inlet of the supercharger, so that the gas flow is smoother.

Description

Double-channel exhaust pipe for taking gas from EGR (exhaust gas Recirculation) channel closest to supercharger

Technical Field

The invention relates to the field of engine exhaust gas recirculation, in particular to a double-channel exhaust pipe for taking gas from EGR (exhaust gas recirculation) of a channel closest to a supercharger.

Background

Engine EGR technology, also known as engine exhaust gas recirculation technology. An internal combustion engine for an automobile is a technology for introducing a part of exhaust gas into an intake side after combustion to allow the exhaust gas to be taken in again.

In the prior art, a single air intake is arranged behind an exhaust manifold to an EGR system, and the pressure difference between exhaust pressure and intake pressure is small, so that the requirement of high EGR rate cannot be met, namely the national emission requirement is difficult to meet.

Disclosure of Invention

In order to make up for the defects, the invention provides a double-channel exhaust pipe for taking gas from a closest channel EGR of a supercharger, aiming at solving the problem that the requirement of higher EGR rate cannot be met due to smaller pressure difference between exhaust pressure and intake pressure by adopting a single gas taking port to an EGR system after an exhaust manifold in the prior art.

The invention is realized by the following steps:

the invention provides a double-channel exhaust pipe for taking exhaust gas from a closest channel EGR of a supercharger, which comprises a first exhaust manifold and a second exhaust manifold.

First exhaust manifold bottom is provided with first air inlet, second air inlet and third air inlet respectively, first exhaust manifold top communicates respectively that there is first EGR to get the trachea and the second EGR gets the trachea, first EGR get the trachea with the second EGR gets the trachea port and all installs in same mounting flange, first exhaust manifold one side is close to first EGR get the trachea with the second EGR gets trachea department and is provided with the booster and gets the gas port, second exhaust manifold bottom is provided with fourth air inlet, fifth air inlet and sixth air inlet respectively, first exhaust manifold one side is provided with connection port, second exhaust manifold top port can dismantle the intercommunication in connection port.

In an embodiment of the present invention, a first flange and a second flange are respectively disposed at the connection port on one side of the first exhaust manifold and the top port of the second exhaust manifold, the first flange and the second flange are detachably and fixedly connected, and a first sealing gasket is disposed between the first flange and the second flange.

In one embodiment of the invention, a removable resilient connection is mounted between the first flange and the second flange.

In an embodiment of the present invention, the elastic connection member includes a fixing bolt and a spring, a screw of the fixing bolt is movably inserted through the first flange and the second flange, and the spring is sleeved outside the screw of the fixing bolt.

In an embodiment of the present invention, the first flange and the second flange are provided with corresponding mounting holes on side surfaces thereof, and the screw of the fixing bolt movably penetrates through the mounting holes.

In an embodiment of the present invention, at least four sets of the elastic connecting members are provided, and the elastic connecting members are distributed between the first flange and the second flange in a central symmetry manner.

In one embodiment of the present invention, the second exhaust manifold top port is provided with a guide pipe inserted inside the connection port on one side of the first exhaust manifold.

In one embodiment of the invention, a sealing sleeve is sleeved outside the guide pipe, and the outer wall of the sealing sleeve is attached to the inner wall of the connecting port.

In one embodiment of the invention, the inner wall of the sealing sleeve is provided with a plurality of groups of annular grooves distributed at equal intervals.

In an embodiment of the present invention, a second sealing washer is disposed inside the connection port on one side of the first exhaust manifold, and one side of the second sealing washer is attached to the port of the guide pipe.

The invention has the beneficial effects that: according to the double-channel exhaust pipe for taking gas from the closest channel EGR of the supercharger, the first exhaust manifold and the second exhaust manifold are connected with each other, the top of the first exhaust manifold adopts a double-channel EGR system connected with the first EGR gas taking pipe and the second EGR gas taking pipe, in order to be matched with a double-channel EGR valve, the engine exhaust pipe is composed of 1-3 cylinder exhaust manifolds and 4-6 cylinder exhaust manifolds, and 1 EGR gas taking port corresponds to an inlet of the double-channel EGR valve. The EGR gas taking port is arranged at the inlet of the supercharger, so that the gas flow is smoother, the EGR rate is up to more than 20%, and the national emission is met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of a dual-channel exhaust pipe configuration for taking EGR gas from the closest channel of a supercharger according to an embodiment of the present invention;

FIG. 2 is a first schematic view of a first flange and a second flange mounting structure provided in an embodiment of the present invention;

FIG. 3 is a second schematic view of a mounting structure of a first flange and a second flange according to an embodiment of the present invention;

fig. 4 is an enlarged schematic structural diagram of a portion a in fig. 3 according to an embodiment of the present invention.

In the figure: 100-a first exhaust manifold; 110 — a first air inlet; 120-a second air inlet; 130-a third air inlet; 140-supercharger air intake; 150-a first EGR take-off tube; 160-a second EGR gas intake pipe; 170-fixing the flange; 180-a first flange; 181-mounting holes; 190-a connection port; 200-a second exhaust manifold; 210-a fourth air inlet; 220-a fifth air inlet; 230-a sixth air inlet; 240-a guide tube; 250-a second flange; 260-a first sealing gasket; 270-an elastic connector; 271-fixing bolts; 272-a spring; 280-a second sealing gasket; 290-sealing sleeve; 291-annular groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1-4, the present invention provides a dual-flow exhaust pipe for taking EGR gas from the closest channel of a supercharger, comprising a first exhaust manifold 100 and a second exhaust manifold 200.

Wherein, first exhaust manifold 100 and second exhaust manifold 200 interconnect, first exhaust manifold 100 top adopt the binary channels EGR system, in order to match with the binary channels EGR valve, the engine exhaust pipe comprises 1 ~ 3 jar exhaust manifold and 4 ~ 6 jar exhaust manifold, respectively has 1 EGR to get the entry of gas port corresponding binary channels EGR valve respectively. The EGR gas taking port is arranged at the inlet of the supercharger, so that the gas flow is smoother, the EGR rate is up to more than 20%, and the national emission is met.

Referring to fig. 1, the first exhaust manifold 100 is provided at the bottom thereof with a first inlet port 110, a second inlet port 120 and a third inlet port 130, respectively. The top of the first exhaust manifold 100 is respectively communicated with a first EGR gas taking pipe 150 and a second EGR gas taking pipe 160, and the first exhaust manifold 100 and the first EGR gas taking pipe 150 and the second EGR gas taking pipe 160 are respectively arranged in an integrated manner. The ports of the first EGR gas taking pipe 150 and the second EGR gas taking pipe 160 are both arranged on the same fixed flange 170, and the first EGR gas taking pipe 150, the second EGR gas taking pipe 160 and the fixed flange 170 are integrally formed; supercharger intake ports 140 are provided in the first exhaust manifold 100 side near the first EGR intake pipe 150 and the second EGR intake pipe 160, and two sets of supercharger intake ports 140 are provided. Wherein the first, second and

third intake ports

110, 120, 130 at the bottom of the first exhaust manifold 100 form a fluid-communicating cavity with the first EGR take off 150 at the top and a set of supercharger take off ports 140.

Referring to fig. 1, a fourth intake port 210, a fifth intake port 220 and a sixth intake port 230 are respectively disposed at the bottom of the second exhaust manifold 200. The first exhaust manifold 100 is provided with a connection port 190 at one side thereof, and the second exhaust manifold 200 is detachably connected to the connection port 190 at a top thereof. Wherein the fourth, fifth and

sixth intake ports

210, 220 and 230 at the bottom of the second exhaust manifold 200 form a cavity in fluid communication with the second EGR gas take off 160 and the other group of supercharger gas take off 140.

Referring to fig. 2, a first flange 180 and a second flange 250 are respectively disposed at a connection port 190 of one side of the first exhaust manifold 100 and a top port of the second exhaust manifold 200, and the first flange 180 and the second flange 250 are respectively integrally formed. The first flange 180 and the second flange 250 are detachably and fixedly connected, and a first sealing gasket 260 is arranged between the first flange 180 and the second flange 250. Wherein the first flange 180, the second flange 250, and the first sealing gasket 260 are provided for sealingly mounting the first exhaust manifold 100 and the second exhaust manifold 200.

Referring to fig. 3, a detachable elastic connector 270 is installed between the first flange 180 and the second flange 250. The elastic connection member 270 includes a fixing bolt 271 and a spring 272. The screws of the fixing bolts 271 respectively penetrate through the first flange 180 and the second flange 250, and the spring 272 is sleeved outside the screws of the fixing bolts 271. The fixing bolts 271 of the elastic connection member 270 are used to fixedly mount the first and

second flanges

180 and 250, and the spring 272 applies elastic force to the first and

second flanges

180 and 250, so that the first and

second flanges

180 and 250 are tightly mounted to the first sealing washer 260. The side surfaces of the first flange 180 and the second flange 250 are provided with corresponding mounting holes 181, and the screw of the fixing bolt 271 movably penetrates through the mounting holes 181; the mounting hole 181 is provided for mounting the fixing bolt 271. At least four groups of elastic connecting pieces 270 are arranged, and the elastic connecting pieces 270 are distributed between the first flange 180 and the second flange 250 in a central symmetry manner; the plurality of sets of elastic connection members 270 serve to stably and fixedly mount the first and

second flanges

180 and 250.

Referring to fig. 3 and 4, a guide pipe 240 is disposed at the top port of the second exhaust manifold 200, and the second exhaust manifold 200 and the guide pipe 240 are integrally formed; the guide pipe 240 is inserted inside the connection port 190 at one side of the first exhaust manifold 100; the arrangement of the guide pipe 240 inserted into the connection port 190 at the side of the first exhaust manifold 100 is to facilitate butt-fitting of the first exhaust manifold 100 and the second exhaust manifold 200. A sealing sleeve 290 is sleeved outside the guide tube 240, and the outer wall of the sealing sleeve 290 is attached to the inner wall of the connecting port 190; the sealing boot 290 enables a better sealing fit between the guide tube 240 and the connection port 190. A plurality of groups of annular grooves 291 which are distributed at equal intervals are arranged on the inner wall of the sealing sleeve 290; the annular groove 291 allows the sealing boot 290 to better conform to the outer wall of the guide tube 240 when compressed. A second sealing washer 280 is disposed inside the connection port 190 of the first exhaust manifold 100, and one side of the second sealing washer 280 is engaged with the port of the guide pipe 240. A second sealing washer 280 for sealing the end of the guide tube 240; the first sealing washer 260, the second sealing washer 280 and the sealing sleeve 290 are all made of metal gaskets.

The working principle of the double-channel exhaust pipe for taking gas from the EGR channel closest to the supercharger is as follows: first exhaust manifold 100 and second exhaust manifold 200 interconnect, first exhaust manifold 100 top adopt the binary channels EGR system that is connected with first EGR and gets trachea 150 and second EGR and get trachea 160, in order to match with the binary channels EGR valve, the engine exhaust pipe comprises 1 ~ 3 jar exhaust manifold and 4 ~ 6 jar exhaust manifold, respectively has 1 EGR to get the entry that the gas port corresponds the binary channels EGR valve respectively. The EGR gas taking port is arranged at the inlet of the supercharger, so that the gas flow is smoother, the EGR rate is up to more than 20%, and the national emission is met.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-flow exhaust pipe for taking exhaust gas from EGR of a closest passage of a supercharger, comprising

The exhaust system comprises a first exhaust manifold (100), wherein a first air inlet (110), a second air inlet (120) and a third air inlet (130) are respectively arranged at the bottom of the first exhaust manifold (100), the top of the first exhaust manifold (100) is respectively communicated with a first EGR gas taking pipe (150) and a second EGR gas taking pipe (160), the ports of the first EGR gas taking pipe (150) and the second EGR gas taking pipe (160) are both installed on the same fixed flange (170), and supercharger gas taking ports (140) are arranged at positions, close to the first EGR gas taking pipe (150) and the second EGR gas taking pipe (160), of one side of the first exhaust manifold (100);

the exhaust system comprises a second exhaust manifold (200), wherein a fourth air inlet (210), a fifth air inlet (220) and a sixth air inlet (230) are respectively arranged at the bottom of the second exhaust manifold (200), a connecting port (190) is arranged on one side of the first exhaust manifold (100), and a top port of the second exhaust manifold (200) is detachably communicated with the connecting port (190).

2. The exhaust pipe with two passages for taking EGR gas from the closest passage of the supercharger according to claim 1, wherein the connection port (190) on the side of the first exhaust manifold (100) and the top port of the second exhaust manifold (200) are respectively provided with a first flange (180) and a second flange (250), the first flange (180) and the second flange (250) are detachably and fixedly connected, and a first sealing gasket (260) is arranged between the first flange (180) and the second flange (250).

3. The dual-flow exhaust pipe for EGR extraction from the closest supercharger passageway of claim 2 wherein a removable resilient connector (270) is mounted between said first flange (180) and said second flange (250).

4. The exhaust pipe with two passages for taking EGR gas from the closest passage of the supercharger according to claim 3, wherein the elastic connector (270) comprises a fixing bolt (271) and a spring (272), the screw of the fixing bolt (271) is movably inserted through the first flange (180) and the second flange (250), respectively, and the spring (272) is sleeved outside the screw of the fixing bolt (271).

5. The exhaust pipe with two channels for taking EGR gas from the closest channel of the supercharger according to claim 4, characterized in that the side surfaces of the first flange (180) and the second flange (250) are provided with corresponding mounting holes (181), and the screw of the fixing bolt (271) movably penetrates through the mounting holes (181).

6. The exhaust pipe with two passages for taking EGR gas from the closest passage of the supercharger according to claim 3, wherein said elastic connecting members (270) are provided in at least four sets, and the elastic connecting members (270) of the sets are distributed in central symmetry between the first flange (180) and the second flange (250).

7. A two-way exhaust pipe for EGR gas from the closest supercharger passage according to claim 2, wherein a top port of the second exhaust manifold (200) is provided with a guide pipe (240), and the guide pipe (240) is inserted inside the connection port (190) on the side of the first exhaust manifold (100).

8. The exhaust pipe with two passages for taking EGR gas from the closest passage of the supercharger according to claim 7, characterized in that the guide pipe (240) is externally sleeved with a sealing sleeve (290), and the outer wall of the sealing sleeve (290) is attached to the inner wall of the connecting port (190).

9. The exhaust pipe with two passages for taking exhaust gas from EGR which is the closest passage of a supercharger according to claim 8, characterized in that the inner wall of the sealing sleeve (290) is provided with a plurality of groups of annular grooves (291) which are distributed at equal intervals.

10. The dual-channel exhaust pipe for extracting EGR gas from the closest channel of the supercharger according to claim 7, wherein a second sealing gasket (280) is provided inside the connection port (190) on the side of the first exhaust manifold (100), and the side of the second sealing gasket (280) is abutted against the port of the guide pipe (240).