CN210660359U - Air inlet pipe of integrated EGR (exhaust gas Recirculation) channel - Google Patents
Air inlet pipe of integrated EGR (exhaust gas Recirculation) channel Download PDFInfo
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- CN210660359U CN210660359U CN201920811691.1U CN201920811691U CN210660359U CN 210660359 U CN210660359 U CN 210660359U CN 201920811691 U CN201920811691 U CN 201920811691U CN 210660359 U CN210660359 U CN 210660359U
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Abstract
The utility model discloses an air inlet pipe of an integrated EGR (exhaust gas Recirculation) channel, which comprises an air inlet pipe body and is characterized in that the end part of the air inlet pipe body is communicated with an air mixing section, and an engine throttle connecting flange is arranged on the outer side surface of the air mixing section far away from the end part; an open type containing cavity is arranged on the other outer side face of the gas mixing section, one end of the containing cavity is close to the end part of the gas inlet pipe body, the other end of the containing cavity extends along the length direction of the gas mixing section, and one end of the containing cavity far away from the end part of the gas inlet pipe body is communicated with the inside of the gas mixing section; the cavity is hermetically connected with a detachable cavity cover to form an EGR waste gas channel, and an EGR air inlet pipe is communicated with the cavity cover close to the end part of the air inlet pipe body. The utility model discloses improve waste gas and fresh air's mixed effect, remedied among the prior art EGR exhaust gas channel integrated on the intake pipe body because the space is not enough to arouse the insufficient defect of mixing.
Description
Technical Field
The utility model relates to an engine parts technical field specifically is an intake pipe of integrated EGR passageway.
Background
In order to meet the requirements of the current engine emission regulations, an EGR (exhaust gas recirculation) system is a common configuration, EGR waste gas is introduced into a fresh air inlet of an air inlet pipe through a pipeline, and the two types of gas are mixed and then enter a cylinder. The design of the structure of the pipeline for introducing the EGR waste gas is influenced by the space of the whole vehicle, and different designs can be provided. In the air inlet pipe in the prior art, as shown in fig. 1 and 2, a conventional scheme that a flange is arranged at a position of the air inlet pipe behind a throttle valve 11 is generally adopted to connect an EGR exhaust gas pipeline, an EGR exhaust gas inlet flange 10 and an air inlet pipe body 1 are cast into a whole, and the EGR exhaust gas pipeline is communicated with the air inlet pipe body 1 through the EGR exhaust gas inlet flange 10.
Because discharge and constantly upgrade, the space that EGR waste gas pipeline arranged has the limitation, 3 surrounding spaces of intake pipe are narrow, there is the reason of interfering the thing in intake pipe body 1 top, can't move EGR waste gas air intake flange 10 open position to interference thing below, it is near to lead to EGR waste gas air intake flange 10 open position from the cylinder intake duct, the mixing section of waste gas and fresh air is short promptly, waste gas is poor with fresh air's mixing effect, be not conform to performance development requirement.
SUMMERY OF THE UTILITY MODEL
To above-mentioned current defect, the utility model provides an intake pipe of integrated EGR passageway solves the difficult problem that can't arrange in the assigned position in order to reach the performance requirement because of the narrow EGR waste gas pipeline that arouses in space.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
the air inlet pipe integrated with the EGR channel comprises an air inlet pipe body and is characterized in that the end part of the air inlet pipe body is communicated with a gas mixing section, and an engine throttle connecting flange is arranged on the outer side surface of the gas mixing section far away from the end part;
an open type containing cavity is arranged on the other outer side face of the gas mixing section, one end of the containing cavity is close to the end part of the gas inlet pipe body, the other end of the containing cavity extends along the length direction of the gas mixing section, and one end of the containing cavity far away from the end part of the gas inlet pipe body is communicated with the inside of the gas mixing section;
the cavity is hermetically connected with a detachable cavity cover to form an EGR waste gas channel, and an EGR air inlet pipe is communicated with the cavity cover close to the end part of the air inlet pipe body.
Through setting up open appearance chamber and detachable chamber lid, the exhaust passage that forms and to guide EGR waste gas covers each other, can lead the EGR waste gas of keeping away from the throttle valve near engine throttle valve flange to lengthened the gas mixing section, solved the EGR flange position of conventional scheme and can not remove, mix the defect that the section is short to be not conform to the performance development.
Specifically, the EGR exhaust gas passage (7) has a gradually decreasing cross-section from the end close to the EGR inlet pipe (4) to the end close to the engine throttle connecting flange (3).
EGR waste gas has become little from the entry to the export cross-section and has formed the water conservancy diversion section for EGR waste gas gets into the intake pipe body with higher speed and mixes with fresh air, has strengthened the effect of mixing.
Specifically, the air inlet pipe body and the cavity are integrally formed.
Specifically, the cavity cover is of a flat plate-shaped structure. The flat structure avoids contacting with an interference object, and better disassembly and assembly are realized.
Specifically, the open end face of the accommodating cavity is provided with a bolt mounting hole, the cavity cover is provided with a through hole corresponding to the bolt mounting hole, and the cavity cover is fastened with the open end face of the accommodating cavity through a bolt.
The utility model has the advantages that:
1. the exhaust gas channel capable of guiding the EGR exhaust gas is formed by arranging the containing cavity, the EGR exhaust gas far away from the throttle valve can be guided to the position near the engine throttle valve connecting flange, and the EGR exhaust gas can be fully mixed under the condition that the EGR exhaust gas inlet is far away from the fresh air inlet, so that the defects that the position of the EGR flange cannot be moved, and the mixing section is too short and does not accord with performance development in the conventional scheme are overcome;
2. the utility model designs the pipeline for introducing EGR waste gas into a flange port structure to form a cavity channel, thereby achieving the function of the pipeline, and the cavity can be designed into a regular or irregular switch from the space, being more flexible and being beneficial to the subsequent parameter change;
3. the utility model discloses an open flange is cast out to this patent in the intake pipe, and the casting degree of difficulty is low, and the maximize has compressed vertical space, avoids interfering with the thing of interfering, has strengthened gas mixture's effect, makes the overall arrangement more compact.
Drawings
FIG. 1 is a schematic illustration of a prior art EGR exhaust line to intake pipe connection interference.
FIG. 2 is a schematic diagram of a prior art EGR exhaust line to intake pipe connection mixing section.
Fig. 3 is a side view of the intake tube when the chamber cover of the present invention is opened.
Fig. 4 is a plan view of the EGR exhaust passage when the chamber cover is opened.
Fig. 5 is a side view of the air inlet pipe when the chamber cover of the present invention is closed.
Fig. 6 is a plan view of the EGR exhaust passage with the chamber cover closed according to the present invention.
Figure 7 is the utility model discloses intake pipe EGR waste gas flow direction sketch map.
In the figure, 1-an air inlet pipe body, 2-an air mixing section, 3-an engine throttle connecting flange, 4-a containing cavity, 5-a cavity cover, 6-an EGR waste gas channel, 7-an EGR air inlet pipe, 8-a bolt mounting hole, 10-an EGR waste gas inlet flange and 11-a throttle.
Detailed Description
In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.
As shown in fig. 3-6, the utility model provides an air inlet pipe of integrated EGR channel, which comprises an air inlet pipe body 1, wherein the end part of the air inlet pipe body 1 is communicated with an air mixing section 2, and an engine throttle connecting flange 3 is arranged on the side surface of the air mixing section 2 far away from the end part and is used for connecting with a throttle; an open type containing cavity 4 is arranged on the other side face of the gas mixing section 2, one end of the containing cavity 4 is close to the end part of the gas inlet pipe body 1, the other end of the containing cavity extends along the length direction of the gas mixing section 2, and one end of the containing cavity 4 far away from the end part of the gas inlet pipe body 1 is communicated with the inside of the gas mixing section 2; the cavity 4 is hermetically connected with a detachable cavity cover 5 to form an EGR waste gas channel 6, and an EGR air inlet pipe 7 is communicated with the cavity cover 5 close to the end part of the air inlet pipe body 1.
As shown in fig. 7, the EGR inlet pipe 7 is connected to the EGR cooler assembly, the engine throttle flange 3 is connected to the throttle valve 11, fresh air enters from the flange 3, EGR gas enters from the EGR inlet pipe 7 to the vicinity of the EGR exhaust passage 6 and the throttle flange 3 in sequence, and the fresh air and the EGR gas are mixed in the gas mixing section 2 and then enter the cylinder through the inlet pipe body 1. Through setting up open appearance chamber 4 and detachable chamber lid 5, cover each other and close the exhaust passage 6 that forms and can guide EGR waste gas, the EGR waste gas that will keep away from throttle valve 11 leads to near engine throttle valve flange 3 to lengthened the gas mixing section, solved the EGR flange position of conventional scheme and can not remove, the mixed section is short for not following the defect of performance development.
Fig. 7 is a sectional view of the gas mixing section 2, and the EGR gas passage 6 has a gradually decreasing cross section from the end near the EGR gas inlet pipe 7 to the end near the engine throttle flange 3 to form a flow guiding section for accelerating the EGR gas to enter the gas inlet pipe body to be mixed with the fresh air.
As the preferred scheme in this embodiment, the air inlet pipe body 1 and the cavity 4 are cast in an integrally formed manner, so that the volume space is reduced.
As a preferable scheme in this embodiment, the specific installation manner of the cavity 4 and the cavity cover 5 is as follows: the cavity cover 5 is of a plate-shaped structure, a bolt mounting hole 8 is formed in the open end face of the accommodating cavity 4, a through hole corresponding to the bolt mounting hole 8 is formed in the cavity cover 6, and the cavity cover 5 is fastened with the open end face of the accommodating cavity 4 through a bolt.
Table 1: performance index comparison of the present scheme with existing schemes
TABLE 1
As can be seen from the table, the EGR passage arrangement adopted in the present embodiment is that the gas mixing section is from L1: 76mm increase to L2: 161mm, the maximum deviation value of the EGR rate of each cylinder in one cycle is improved from +/-15% to +/-6%, and the mixing performance of EGR waste gas and fresh air is enhanced.
Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (5)
1. The air inlet pipe integrated with the EGR channel comprises an air inlet pipe body (1), and is characterized in that the end part of the air inlet pipe body (1) is communicated with a gas mixing section (2), and an engine throttle connecting flange (3) is arranged on the outer side surface of the gas mixing section (2) far away from the end part;
an open type containing cavity (4) is arranged on the other outer side face of the gas mixing section (2), one end of the containing cavity (4) is close to the end part of the gas inlet pipe body (1), the other end of the containing cavity extends along the length direction of the gas mixing section (2), and one end of the containing cavity (4) far away from the end part of the gas inlet pipe body (1) is communicated with the inside of the gas mixing section (2);
the cavity (4) is hermetically connected with a detachable cavity cover (5) to form an EGR waste gas channel (6), and an EGR air inlet pipe (7) is communicated with the cavity cover (5) close to the end part of the air inlet pipe body (1).
2. The intake pipe of an integrated EGR passage according to claim 1, characterized in that: the EGR waste gas channel (6) has a gradually reduced section from one end close to the EGR air inlet pipe (7) to one end close to the engine throttle valve connecting flange (3).
3. The intake pipe of an integrated EGR passage according to claim 1, characterized in that: the air inlet pipe body (1) and the containing cavity (4) are integrally formed.
4. The intake pipe of an integrated EGR passage according to claim 1, characterized in that: the cavity cover (5) is of a flat plate structure.
5. The intake pipe of an integrated EGR passage according to claim 1, characterized in that: the cavity cover is characterized in that a bolt mounting hole (8) is formed in the open end face of the accommodating cavity (4), a through hole corresponding to the bolt mounting hole (8) is formed in the cavity cover (5), and the cavity cover (5) is connected with the open end face of the accommodating cavity (4) through a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920811691.1U CN210660359U (en) | 2019-05-31 | 2019-05-31 | Air inlet pipe of integrated EGR (exhaust gas Recirculation) channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920811691.1U CN210660359U (en) | 2019-05-31 | 2019-05-31 | Air inlet pipe of integrated EGR (exhaust gas Recirculation) channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210660359U true CN210660359U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920811691.1U Active CN210660359U (en) | 2019-05-31 | 2019-05-31 | Air inlet pipe of integrated EGR (exhaust gas Recirculation) channel |
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| CN (1) | CN210660359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259609A (en) * | 2019-05-31 | 2019-09-20 | 广西玉柴机器股份有限公司 | A kind of air inlet pipe of integrated EGR channel |
-
2019
- 2019-05-31 CN CN201920811691.1U patent/CN210660359U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259609A (en) * | 2019-05-31 | 2019-09-20 | 广西玉柴机器股份有限公司 | A kind of air inlet pipe of integrated EGR channel |
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