CN212359982U - High-uniformity intake manifold - Google Patents

Abstract

The utility model provides a high homogeneity air intake manifold, include: an intake manifold; the first end surface of the pressure stabilizing cavity is connected with the air inlet main pipe; the air inlet end of the branch pipe group is connected with the second end surface of the pressure stabilizing cavity; the included angle between the axis of the air inlet main pipe and the second end face of the pressure stabilizing cavity is alpha, and alpha is more than or equal to 15 degrees and less than or equal to 25 degrees; the included angle between the axis of the branch pipe group and the second end face of the pressure stabilizing cavity is beta, and the beta is more than or equal to 85 degrees and less than or equal to 95 degrees; the intake manifold has reasonable design and compact structure, and can provide basically the same air input for each cylinder of the engine in the limited engine arrangement space; the air intake flow coefficient deviation of each cylinder of the engine is small, and the air intake uniformity is high, so that the combustion of each cylinder is more uniform and stable, and the performance and the working reliability of the engine are improved.

Description

High-uniformity intake manifold

Technical Field

The utility model relates to an engine and accessory technical field especially relate to a high homogeneity intake manifold.

Background

The engine intake manifold is an important component of an engine intake system, and the main function of the engine intake manifold is to uniformly deliver more air to each cylinder, and the performance of the engine intake manifold directly affects the reliability, the dynamic performance and the economical efficiency of the engine.

For a naturally aspirated engine, particularly a low-speed engine, the intake manifold branch pipe is generally long in consideration of the resonance effect, and if the arrangement requirements of different vehicle types are considered to be matched, the intake manifold needs to be arranged in the middle of the intake manifold, so that the intake manifold is compact and can obtain good intake uniformity, and the structural design of the intake manifold faces a great challenge.

The structure of an intake manifold in the current market generally adopts a rough design according to the arrangement space of a whole vehicle and an engine, and is optimized properly only through software, so that good effect on uniformity is hardly achieved while circulation is considered.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Based on the problem, the utility model provides a high homogeneity air intake manifold to when alleviating among the prior art and carrying out certain local optimization through extensive type design with analysis software, air intake manifold's design is difficult when considering the circulation gains technical problem such as fine effect in the aspect of the homogeneity.

(II) technical scheme

The utility model discloses in, provide an air intake manifold, include: an intake manifold; the first end surface of the pressure stabilizing cavity is connected with the air inlet main pipe; the air inlet end of the branch pipe group is connected with the second end surface of the pressure stabilizing cavity; the included angle between the axis of the air inlet main pipe and the second end face of the pressure stabilizing cavity is d, and d is more than or equal to 15 degrees and less than or equal to 25 degrees.

In the embodiment of the utility model, the included angle between the axis of the branch pipe group and the second end surface of the pressure stabilizing cavity is beta, and beta is more than or equal to 85 degrees and less than or equal to 95 degrees.

In an embodiment of the present invention, the air inlet end of the branch pipe group includes two small air inlets and two large air inlets.

In an embodiment of the present invention, the large inlet cross-sectional area is 1.3 to 1.5 times the small inlet cross-sectional area.

In the embodiment of the utility model, the two small air inlets and the two large air inlets are respectively connected with each branch pipe of the branch pipe group to the engine; the length deviation of each branch pipe is less than 1%.

In an embodiment of the present invention, the two small air inlets are symmetrically disposed on two sides of a proximal end of a symmetry plane where an axis of the branch pipe group and an axis of the air inlet main pipe are located.

In the embodiment of the present invention, the two large air inlets are respectively symmetrically disposed on two sides of the far end of the symmetry plane where the axis of the branch pipe set and the axis of the air inlet main pipe are located.

In the embodiment of the present invention, the wall of the pressure stabilizing cavity at the air inlet of the air inlet end is tangent to the wall of each branch pipe of the branch pipe group.

(III) advantageous effects

According to the above technical solution, the utility model discloses high homogeneity air intake manifold has one of them or one of them part of following beneficial effect at least:

(1) the intake manifold has the advantages that the design is reasonable, the structure is compact, and the intake manifold can provide basically the same air inflow for each cylinder of the engine in the limited engine arrangement space;

(2) the air intake flow coefficient deviation of each cylinder of the engine is small, and the air intake uniformity is high, so that the combustion of each cylinder is more uniform and stable, and the performance and the working reliability of the engine are improved.

Drawings

Fig. 1 is a schematic structural diagram of an intake manifold with high uniformity according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the junction of the group of branch tubes shown in a-a in fig. 1 and the plenum chamber.

[ description of the main reference numerals in the drawings ] for the embodiments of the present invention

1-an air inlet main pipe;

2-axis of intake manifold;

3-a branch pipe group;

4-axis of the set of legs;

5-a voltage stabilizing cavity;

6-small air inlet;

7-large air inlet;

the included angle between the axis of the alpha-air inlet manifold and the second end face of the pressure stabilizing cavity is formed;

and the axis of the beta-branch pipe group forms an included angle with the second end face of the pressure stabilizing cavity.

Detailed Description

The utility model provides a high homogeneity air intake manifold, its reasonable in design, compact structure, in limited engine layout space, air intake manifold can provide the air input that the basic same for each jar of engine, and the air input coefficient deviation of each jar is little, and the homogeneity of admitting air is high to make each jar of burning of engine evenly stable more, improve the reliability of engine performance and work.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.

In an embodiment of the present invention, there is provided a high uniformity intake manifold, as shown in fig. 1 and 2, the intake manifold including:

an intake manifold 1;

a pressure stabilizing cavity 5, the first end surface of which is connected with the air inlet manifold 1; and

the air inlet end of the branch pipe group 3 is connected with the second end surface of the pressure stabilizing cavity; the included angle between the axis 2 of the air inlet main pipe and the second end face of the pressure stabilizing cavity is alpha, and alpha is more than or equal to 15 degrees and less than or equal to 25 degrees;

the included angle between the axis 4 of the branch pipe group and the second end face of the pressure stabilizing cavity is beta, and the beta is more than or equal to 85 degrees and less than or equal to 95 degrees;

the air inlet end of the branch pipe group comprises two small air inlets 6 and two large air inlets 7;

the two small air inlets and the two large air inlets are respectively connected with each branch pipe of the branch pipe group to the engine;

the large inlet cross-sectional area is 1.3 to 1.5 times the small inlet cross-sectional area.

The two small air inlets are respectively and symmetrically arranged at two sides of the near end of the symmetrical plane where the axis of the air inlet main pipe is located;

the two large air inlets are respectively and symmetrically arranged at two sides of the far end of a symmetrical plane where the axis of the air inlet main pipe is located;

the length deviation of each branch pipe of the branch pipe group is less than 1%.

The wall surface of the pressure stabilizing cavity at the air inlet of the branch pipe group 3 is tangent to the wall surface of each branch pipe of the branch pipe group 3, so that the airflow transmission is more stable.

The first end face is the end face of the side, connected with the air inlet main pipe, of the pressure stabilizing cavity; the second end surface is the end surface of the side, connected with the branch pipe group, of the pressure stabilizing cavity; the axes of the intake manifold and the axes of the branch pipe groups are located in the above-mentioned symmetry plane.

In the embodiment of the present invention, as shown in fig. 2, the two small air inlets and the two large air inlets are arranged along the X axis of the coordinate system axis, wherein the two small air inlets are respectively symmetrically disposed at the near end of a symmetric surface of the Y-Z plane; the two large air inlets are respectively and symmetrically arranged at the far ends of the symmetrical plane; the air inlets of the branch pipe groups in the pressure stabilizing cavity are symmetrically arranged relative to the air inlet main pipe, so that air input by the air inlet main pipe can be more uniformly conveyed to each branch pipe.

So far, the embodiments of the present invention have been described in detail with reference to the accompanying drawings. It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. Further, the above definitions of the various elements and methods are not limited to the various specific structures, shapes or arrangements of parts mentioned in the examples, which may be easily modified or substituted by those of ordinary skill in the art.

From the above description, those skilled in the art should clearly recognize that the high uniformity intake manifold of the present invention is applicable.

To sum up, the utility model provides a high homogeneity air intake manifold, its reasonable in design, compact structure in limited engine arrangement space, air intake manifold can provide the air input of the same basically for each jar of engine, and the air input coefficient deviation of each jar is little, and the homogeneity of admitting air is high to make each jar of engine burning more evenly stable, improve the reliability of engine performance and work.

It should also be noted that directional terms, such as "upper", "lower", "front", "rear", "left", "right", etc., used in the embodiments are only directions referring to the drawings, and are not intended to limit the protection scope of the present invention. Throughout the drawings, like elements are represented by like or similar reference numerals. Conventional structures or constructions will be omitted when they may obscure the understanding of the present invention.

And the shapes and sizes of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present invention. Furthermore, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

Unless otherwise indicated, the numerical parameters set forth in the specification and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by the present invention. In particular, all numbers expressing quantities of ingredients, reaction conditions, and so forth used in the specification and claims are to be understood as being modified in all instances by the term "about". Generally, the expression is meant to encompass variations of ± 10% in some embodiments, 5% in some embodiments, 1% in some embodiments, 0.5% in some embodiments by the specified amount.

Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

The use of ordinal numbers such as "first," "second," "third," etc., in the specification and claims to modify a corresponding element does not by itself connote any ordinal number of the element or any ordering of one element from another or the order of manufacture, and the use of the ordinal numbers is only used to distinguish one element having a certain name from another element having a same name.

In addition, unless steps are specifically described or must occur in sequence, the order of the steps is not limited to that listed above and may be changed or rearranged as desired by the desired design. The embodiments described above may be mixed and matched with each other or with other embodiments based on design and reliability considerations, i.e., technical features in different embodiments may be freely combined to form further embodiments.

Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Also in the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the invention and aiding in the understanding of one or more of the various disclosed aspects. However, the disclosed method should not be interpreted as reflecting an intention that: rather, the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, disclosed aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (8)

1. An intake manifold, comprising:

an intake manifold;

the first end surface of the pressure stabilizing cavity is connected with the air inlet main pipe; and

the air inlet end of the branch pipe group is connected with the second end surface of the pressure stabilizing cavity;

the included angle between the axis of the air inlet main pipe and the second end face of the pressure stabilizing cavity is alpha, and d is more than or equal to 15 degrees and less than or equal to 25 degrees.

2. An air intake manifold according to claim 1 wherein the axis of the group of legs subtends an angle β of 85 ° β 95 ° with the second end face of the plenum.

3. The intake manifold of claim 1, wherein the intake end of the group of branch pipes comprises two small intake ports and two large intake ports.

4. The intake manifold of claim 3, wherein the large inlet cross-sectional area is 1.3 to 1.5 times the small inlet cross-sectional area.

5. The intake manifold according to claim 3, wherein the two small intake ports and the two large intake ports respectively connect the respective branch pipes of the branch pipe group to the engine; the length deviation of each branch pipe is less than 1%.

6. The intake manifold of claim 3, wherein the two small intake ports are symmetrically arranged on two sides of the proximal end of a symmetry plane on which the axes of the branch pipe group and the intake manifold are located.

7. The intake manifold of claim 3, wherein the two large intake ports are symmetrically arranged at two sides of the far end of the symmetry plane where the axes of the branch pipe group and the intake manifold are located.

8. The intake manifold of claim 1, wherein a wall surface of the plenum at the inlet of the intake end is tangent to a wall surface of each leg of the group of legs.

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