Intake manifold with flow guide elbow and assembly method thereof

Abstract

The present invention belongs to the field of automobile engines, and specifically relates to an intake manifold with a guide bend and an assembly method thereof, wherein the intake manifold includes a main airflow inlet and an introduced airflow inlet, and a guide bend is provided inside the intake manifold for adjusting the flow direction of the introduced airflow to the flow direction of the main airflow; one end of the guide bend is installed at the position of the introduced airflow inlet, and the other end is bent and the bent guide bend is parallel to the flow direction of the main airflow entering from the main airflow inlet. The guide bend structure designed with a specific bending angle of the present invention can guide the external airflow to enter the intake manifold along the flow direction of the main airflow inside the intake manifold, thereby effectively avoiding the airflow disturbance caused to the gas flow of the intake manifold itself, so as to avoid energy loss; and the introduction angle of the guide bend is adjustable, which is suitable for guiding gas fluids and liquid fluids, and can be applied to pipelines or channels that require airflow guidance; the assembly method is simple and easy to operate, and has a good industrial application prospect.

Description

Technical Field

[0001] The invention belongs to the field of automobile engines, and relates to an intake manifold with a guide bend and an assembly method thereof, and in particular to an intake manifold with a guide bend applied to an automobile engine and an assembly method thereof. Background Art

[0002] Due to emission regulations and its own functional needs, it is necessary to introduce exhaust gas recirculation (EGR) gas and crankcase forced ventilation (PCV) gas into the automobile intake manifold for secondary combustion. These gases enter the intake manifold cavity through an external nozzle set on the intake manifold. Due to the limitations of the processing technology and installation structure of this external nozzle, the introduced gas can only flow along the axis of the nozzle and cannot enter the cavity along the flow direction of the airflow, which disrupts the airflow direction inside the intake manifold, adversely affects the balance of the intake, and thus reduces engine performance.

[0003] In the traditional design, external gas that needs to enter the intake manifold, such as PCV gas or EGR gas, enters through the external pipe joint of the intake manifold and directly rushes into the intake manifold cavity, which will greatly interfere with the normal flow of air in the cavity. Therefore, it is necessary to design a new intake manifold structure to ensure the normal flow of air in the intake manifold cavity. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problems existing in the prior art, and proposes an intake manifold with a guide bend and an assembly method thereof. The guide bend structure can guide the direction of the external airflow so that it enters the intake manifold along the main airflow flow direction inside the intake manifold, effectively avoiding airflow disturbance caused to the gas flow of the intake manifold itself.

[0005] The technical solution of the present invention is:

[0006] An intake manifold with a guide bend, the intake manifold comprising a main airflow inlet and an introduced airflow inlet, the intake manifold being provided with a guide bend for adjusting the flow direction of the introduced airflow to the flow direction of the main airflow; one end of the guide bend is installed at the position of the introduced airflow inlet, and the other end is bent and the bent guide bend is parallel to the flow direction of the main airflow entering from the main airflow inlet.

[0007] Furthermore, the guide elbow is in the shape of a bent tubular structure, and its bending direction is consistent with the main airflow direction of the main airflow inlet.

[0008] Furthermore, the air flow inlet is fixedly provided with a pipe joint, and a partition piece for clamping the diversion elbow is arranged inside the pipe joint, and the partition piece and the pipe joint are formed into an integrated structure by injection molding; one end of the diversion elbow extends into the pipe joint and is connected to the partition piece.

[0009] Furthermore, one end of the diversion bend pipe connected to the partition piece is provided with a positioning rib and a clamping boss, and the partition piece is provided with a positioning groove matching the positioning rib, and the positioning rib is inserted into the positioning groove to play a positioning role; the partition piece is also provided with a pipe hole connected to the pipe mouth of the diversion bend pipe, and the pipe mouth of the diversion bend pipe extends out of the pipe hole and is fixed at the pipe hole through the clamping boss.

[0010] Furthermore, a sealing groove is provided at a position where the diversion elbow contacts the inner wall of the pipe joint, and a sealing ring is installed in the sealing groove to ensure airtight contact between the diversion elbow and the pipe joint.

[0011] Furthermore, the top of the positioning rib is chamfered.

[0012] Furthermore, the intake manifold also includes a plurality of airflow outlets, and the plurality of airflow outlets are arranged side by side.

[0013] A method for assembling an intake manifold with a guide bend comprises the following steps: installing a sealing ring into a sealing groove of the guide bend, inserting a positioning rib of the guide bend into the positioning groove for positioning, extending a pipe opening of the guide bend into a pipe hole, and fixing the pipe opening with a clamping boss at the pipe hole; after assembly, the guide bend and the pipe joint of the intake manifold are in a sealed state, forming a closed gas flow passage inside the intake manifold.

[0014] Beneficial effects of the present invention:

[0015] (1) The present invention can ensure the stability of the structure while ensuring rapid installation by setting the positioning ribs and the clamping bosses; the sealing grooves and the sealing rings are used together to ensure that the entire intake manifold structure with the guide bend has good sealing performance; the guide bend has a simple structure and low manufacturing cost, and its assembly method is simple and easy to operate, and it can be stably assembled without the aid of installation tools or the addition of other assembly parts, and has a good industrial application prospect.

[0016] (2) The intake manifold with a guide bend provided by the present invention guides the external airflow through the installed guide bend structure, so that it enters the intake manifold along the direction of the main airflow inside the intake manifold, thereby effectively avoiding the airflow disturbance caused to the gas flow of the intake manifold itself; this structure is not only suitable for guiding gaseous fluids, but also suitable for guiding liquid fluids.

[0017] (3) The present invention can adjust the bending angle of the guide bend according to the direction of the main airflow, ensuring that it is always arranged along the main fluid flow direction, guiding the external fluid to be consistent with the running trajectory of the main airflow, not disturbing the running trajectory of the main airflow, and avoiding energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of an intake manifold with a guide elbow provided by the present invention;

[0019] Figure 2 A schematic diagram of the airflow direction in an intake manifold without a guide bend;

[0020] Figure 3 A schematic diagram of the structure of the diversion elbow provided by the present invention;

[0021] Figure 4 A schematic diagram of the assembly of the diversion elbow and the pipe joint provided by the present invention;

[0022] Figure 5 A schematic diagram of the structure of the partition member inside the pipe joint provided by the present invention;

[0023] In the above figures, 1. guide bend; 11. positioning rib; 12. snap-in boss; 13. sealing groove; 2. air flow inlet; 21. pipe joint; 22. partition piece; 221. positioning groove; 222. pipe hole; 3. air flow outlet; 4. main air flow inlet. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In order to further understand the present invention, the present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0026] Example

[0027] like Figure 1 As shown, the present invention relates to an intake manifold with a guide bend 1, the intake manifold comprises a main air flow inlet 4 and an introduced air flow inlet 2, and a guide bend 1 is provided inside the intake manifold for adjusting the flow direction of the introduced air flow to the flow direction of the main air flow; one end of the guide bend 1 is installed at the position of the introduced air flow inlet 2, and the other end is bent and the bent guide bend 1 is parallel to the flow direction of the main air flow entering from the main air flow inlet 4.

[0028] In the above-mentioned intake manifold structure with the guide bend 1, the guide bend 1 is set at the air inlet 2, and the bending angle of the guide bend can be adjusted according to the direction of the main air flow to ensure that it is always set along the direction of the main air flow, guiding the external fluid to keep consistent with the running trajectory of the main air flow without disturbing the running trajectory of the main air flow. If the guide bend 1 is not set in the intake manifold, then Figure 2 As shown, the airflow entering from the airflow inlet 2 will directly rush into the intake manifold cavity, thereby causing great interference to the normal airflow flowing in the cavity.

[0029] It should be noted that the function of the guide elbow 1 structure provided by the present invention is to guide the flow direction of the airflow, and therefore it is also applicable to other pipelines or channels involving airflow direction guidance. The guide elbow 1 has a simple structure, low manufacturing cost, and a wide range of applications.

[0030] In this specific embodiment, Figure 3 As shown, the shape of the guide bend 1 is a bent tubular structure, and its bending direction is consistent with the main airflow direction of the main airflow inlet 4. The guide bend 1 is arranged above the airflow outlet 3. The guide bend 1 is used to change the flow direction of the introduced airflow, so the guide bend 1 needs to be a bent shape, and its bending direction is determined according to the flow direction of the main airflow flowing inside the intake manifold. After installing the internal guide bend 1, the external introduced airflow is guided through this internal bend channel, and then the intake direction is changed to flow along the main airflow direction. In specific applications, according to the flow direction of the main airflow inside the intake manifold, the specifications of the guide bend 1 and its bending direction and angle are customized in advance so that it can match the main airflow direction in the intake manifold.

[0031] A pipe joint 21 is fixedly provided at the position of the air flow inlet 2, and a partition 22 for clamping the diversion elbow 1 is provided inside the pipe joint 21; the partition 22 and the pipe joint 21 are formed into an integrated structure by injection molding; the function of the partition 22 here is to clamp and fix the diversion elbow 1, and the partition 22 and the pipe joint 21 are made by injection molding, which can ensure the sealing of the entire structure. Figure 4 As shown, one end of the diversion elbow 1 extends into the pipe joint 21 and is connected to the partition 22. The diversion elbow 1 and the partition 22 are fixedly connected. The end of the diversion elbow 1 connected to the partition 22 is provided with a positioning rib 11 and a clamping boss 12, as shown in FIG. Figure 5As shown, the partition piece 22 is provided with a positioning groove 221 matching the positioning rib 11, and the positioning rib 11 is inserted into the positioning groove 221 to play a positioning role; the partition piece 22 is also provided with a pipe hole 222 connected to the pipe mouth of the diversion elbow 1, and the pipe mouth of the diversion elbow 1 extends out of the pipe hole 222 and is fixed at the pipe hole 222 through the clamping boss 12. During assembly, the positioning rib 11 is inserted into the positioning groove 221 for positioning, and then the pipe mouth is inserted into the pipe hole 222 and is clamped and fixed through the clamping boss 12.

[0032] The partition piece 22 and the pipe joint 21 used in this specific embodiment are an integrated structure, and both can be made of plastic materials. The partition piece 22 can be made into a card structure. The material of the partition piece 22 needs to have a certain elasticity, so that the diversion elbow 1 can be easily inserted into the partition piece 22 for fixing and sealing, and also needs to have a certain rigidity to prevent the partition piece 22 from being excessively deformed, resulting in an unstable assembly structure.

[0033] Furthermore, a sealing groove 13 is provided at the position where the diversion elbow 1 contacts the inner wall of the pipe joint 21, and a sealing ring is installed in the sealing groove 13 to ensure airtight contact between the diversion elbow 1 and the pipe joint 21. In this specific embodiment, an O-type sealing ring is used, and the O-type sealing ring is installed in the sealing groove 13, so that the diversion elbow 1 and the pipe joint 21 are tightly fitted without a gap, thereby playing a sealing role.

[0034] In a specific embodiment, the top of the positioning rib 11 is chamfered, which plays a guiding role during installation and facilitates assembly; the chamfered shape is conducive to the insertion of the positioning rib 11 into the positioning groove 221, which is convenient for installation.

[0035] The intake manifold includes a plurality of air flow outlets 3. It is understandable that in this specific embodiment, the number of the air flow outlets 3 is 4, and the 4 air flow outlets 3 are arranged side by side; the main air flow inlet 4 is located at the top, and the introduced air flow inlet 2 is arranged on the pipe wall between the main air flow inlet 4 and the air flow outlet 3.

[0036] A method for assembling an intake manifold with a guide bend 1 comprises the following steps: installing a sealing ring into a sealing groove of the guide bend, inserting a positioning rib of the guide bend into the positioning groove for positioning, extending the pipe opening of the guide bend into a pipe hole, and fixing the pipe hole with a clamping boss; after assembly, the pipe joint of the guide bend and the intake manifold is in a sealed state, forming a closed gas flow passage inside the intake manifold.

[0037] It can be understood that the assembly method is simple and easy to operate, and the diversion elbow 1 can be stably assembled into the pipeline without the aid of installation tools or the addition of other assembly parts. In actual application, when installation is difficult due to narrow pipelines or installation space, the assembly structure of the diversion elbow 1 and the pipe joint provided by the present invention can be adopted, so that the two assembly parts can be directly clamped and fixed, and the sealing of the device can be ensured at the same time.

[0038] The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, modification, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intake manifold with a guide elbow, characterized in that: The intake manifold comprises a main airflow inlet and an introduced airflow inlet, and a guide bend pipe is provided inside the intake manifold for adjusting the flow direction of the introduced airflow to the flow direction of the main airflow; one end of the guide bend pipe is installed at the position of the introduced airflow inlet, and the other end is bent and the bent guide bend pipe is parallel to the flow direction of the main airflow entering from the main airflow inlet; The guide elbow is in the shape of a bent tubular structure, and its bending direction is consistent with the main airflow direction of the main airflow inlet; The air flow inlet is fixedly provided with a pipe joint, and a partition piece for clamping the diversion elbow is arranged inside the pipe joint, and the partition piece and the pipe joint are integrally formed by injection molding to form an integrated structure; one end of the diversion elbow extends into the pipe joint and is connected to the partition piece; One end of the diversion bend connected to the partition piece is provided with a positioning rib and a clamping boss, and the partition piece is provided with a positioning groove matching the positioning rib, and the positioning rib is inserted into the positioning groove to play a positioning role; the partition piece is also provided with a pipe hole connected to the pipe mouth of the diversion bend, and the pipe mouth of the diversion bend extends out of the pipe hole and is fixed at the pipe hole through the clamping boss; A sealing groove is provided at the position where the diversion elbow contacts the inner wall of the pipe joint, and a sealing ring is installed in the sealing groove to ensure airtight contact between the diversion elbow and the pipe joint.

2. The intake manifold with a guide bend according to claim 1, characterized in that: The top of the positioning rib is chamfered.

3. The intake manifold with a guide bend according to claim 1, characterized in that: The intake manifold further comprises a plurality of airflow outlets, and the plurality of airflow outlets are arranged side by side.

4. The method for assembling an intake manifold with a guide elbow according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: installing the sealing ring into the sealing groove of the guide bend pipe, inserting the positioning rib of the guide bend pipe into the positioning groove for positioning, extending the pipe mouth of the guide bend pipe into the pipe hole, and fixing the pipe mouth of the guide bend pipe with the clamping boss at the pipe hole; after assembly, the pipe joint of the guide bend pipe and the intake manifold is in a sealed state, forming a closed gas flow passage inside the intake manifold.

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