CN215927597U

CN215927597U - Air intake system and vehicle

Info

Publication number: CN215927597U
Application number: CN202121086734.8U
Authority: CN
Inventors: 王贵琛; 赵见祥; 曾凡
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2022-03-01
Anticipated expiration: 2031-05-20

Abstract

The utility model belongs to the technical field of vehicles and discloses an air intake system and a vehicle. The air inlet system comprises a mixer, an air inlet pipeline and an air inlet manifold, wherein the mixer is used for mixing fuel gas and air to form mixed gas, the mixer is communicated with the air inlet manifold through the air inlet pipeline, the air inlet manifold is used for respectively conveying the mixed gas to a plurality of cylinders, and the cylinder closest to the air inlet pipeline is a first cylinder; the air inlet of the insertion pipe is arranged on the air inlet pipeline in a penetrating mode and communicated with the outlet of the air inlet pipeline, and the air outlet of the insertion pipe is arranged on the air inlet manifold in a penetrating mode and located between the air inlet pipeline and the first cylinder. This air intake system, the pipe of pegging graft has played the pipeline extension of air inlet pipe way, and the pipeline is longer more, and the homogeneity that the mist mixes is better, and the mist that flows from the blender gets into in the first cylinder after air inlet pipe way and the pipe of pegging graft in proper order for the mist that gets into in the first cylinder can realize intensive mixing, satisfies the demand of engine homogeneous combustion.

Description

Air intake system and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to an air intake system and a vehicle.

Background

With the development of technology and the gradual increase of environmental protection requirements, gas machines using gas as fuel are more and more widely applied to various fields. The gas engine is superior to gasoline and diesel engines in various aspects such as energy conservation, environmental protection and the like. When the gas engine works, air is pressurized by the supercharger to enter the mixer, and after gas fuel and air are mixed in the mixer, the gas fuel and the air enter the combustion chamber through the air inlet pipe and other devices, so that the gas engine finally works.

The gas engine has high requirements on the uniformity of air intake mixing, and the mixing of gas and air is mainly realized by a mixer at present. Because the distance from the mixer to the first cylinder is small, the mixing uniformity of the fuel gas entering the first cylinder is poor, and the combustion effect is poor. The limitation of installation space is received, and the mixing uniformity of gas and air is difficult to guarantee by only depending on the mixer, so that the requirement of uniform combustion of the engine cannot be met. If the air inlet concentration of each cylinder is inconsistent, faults such as engine knocking, exhaust temperature and the like can be caused, and the use safety is affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an air intake system and a vehicle, which can improve the mixing uniformity of gas and air so as to ensure good combustion effect.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an air intake system, comprising a mixer, an air intake pipe and an air intake manifold, wherein the mixer is used for mixing gas and air to form mixed gas, the mixer is communicated with the air intake manifold through the air intake pipe, the air intake manifold is used for respectively delivering the mixed gas to a plurality of cylinders, the cylinder closest to the air intake pipe is a first cylinder, and the air intake system further comprises:

the air inlet of the insertion pipe is arranged in the air inlet pipeline in a penetrating mode and communicated with the outlet of the air inlet pipeline, and the air outlet of the insertion pipe is arranged in the air inlet manifold in a penetrating mode and located between the air inlet pipeline and the first cylinder.

Preferably, a first branch pipe communicated with an air inlet of the first cylinder is arranged on the air inlet manifold, and the first branch pipe is partially blocked by the plug pipe.

Preferably, the length of the end face of the air outlet of the insertion pipe exceeding the middle axial face of the first branch pipe is L, the diameter of the first branch pipe is D, and L is more than or equal to 0 and less than or equal to 10 percent of D is satisfied, wherein the middle axial face is a middle axial face parallel to the end face of the insertion pipe.

Preferably, the outer diameter of the insertion pipe is d1, the inner diameter of the air inlet manifold is d2, and d1/d2 is less than or equal to 75%.

Preferably, the air inlet pipeline comprises an air inlet communicating pipe and an air inlet connecting pipe, one end of the air inlet communicating pipe is communicated with the mixer, the other end of the air inlet communicating pipe is communicated with the air inlet connecting pipe, and the inserting pipe penetrates through one end, far away from the mixer, of the air inlet connecting pipe.

Preferably, a limiting groove is formed in the inner wall of the air inlet connecting pipe and used for axial limiting of the insertion pipe.

Preferably, a throttle valve is provided between the intake communicating pipe and the intake connecting pipe.

Preferably, the intake communicating pipe and the throttle valve are connected by a flange.

Preferably, the intake communicating pipe is of a bent pipe structure.

In order to achieve the above object, the present invention further provides a vehicle including an engine and the above intake system, where the intake system is respectively communicated with the plurality of cylinders of the engine.

The utility model has the beneficial effects that:

according to the air inlet system provided by the utility model, the air inlet of the insertion pipe penetrates through the air inlet pipeline and is communicated with the outlet of the air inlet pipeline, the insertion pipe plays a role in prolonging the pipeline of the air inlet pipeline, and the longer the pipeline is, the better the mixing uniformity of mixed gas is. The air outlet of the insertion pipe is arranged in the air inlet manifold in a penetrating mode, the insertion pipe is equivalently added in the air inlet manifold, the appearance of the whole machine is not affected, and the appearance is good. The gas outlet through setting up the pipe of pegging graft is located between air inlet pipe and the first cylinder for outside the gas outlet of pipe of pegging graft stretches out air inlet pipe, compare with prior art, the mist that flows from the blender gets into in the first cylinder after air inlet pipe and the pipe of pegging graft in proper order, make the mist that gets into in the first cylinder can realize intensive mixing, thereby satisfy the demand of engine homogeneous combustion.

The utility model also provides a vehicle which comprises an engine and an air inlet system, wherein the air inlet system is respectively communicated with the plurality of air cylinders of the engine, the air inlet system ensures that the air inlet concentration of each air cylinder is consistent so as to meet the requirement of uniform combustion of the engine, the problems of engine knocking, high exhaust temperature and the like are avoided, and the use safety is higher.

Drawings

FIG. 1 is a schematic view of the air induction system of the present invention from one perspective;

FIG. 2 is a schematic view of an alternative aspect of the air induction system of the present invention;

FIG. 3 is a schematic diagram of the intake system of the present invention affecting the homogeneity of the mixture in each cylinder;

fig. 4 is a schematic diagram of the intake system of the present invention affecting the intake air amount for each cylinder.

In the figure:

1. a mixer; 2. an air intake line; 3. an intake manifold; 4. a first branch pipe; 5. a second branch pipe; 6. inserting a pipe; 7. a throttle valve; 8. a flange;

21. an air intake communicating pipe; 22. an air inlet connecting pipe.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; 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 in specific cases to those skilled in the art.

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.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

The gas engine takes gas as fuel, and the gas and air are mixed and then enter each cylinder to complete the combustion process. If the air inlet concentration of each cylinder is inconsistent, faults such as engine knocking, exhaust temperature and the like can be caused. In order to solve the problem, the present embodiment provides an air intake system, as shown in fig. 1, the air intake system includes a mixer 1, an air intake pipeline 2 and an air intake manifold 3, an air port and a gas port are respectively provided on the mixer 1, the air port is used for introducing air, the gas port is used for introducing gas, the mixer 1 is used for mixing gas and air to form mixed gas, and the mixer 1 improves the mixing uniformity of gas and air. The mixer 1 is communicated with an intake manifold 3 through an intake pipeline 2, the intake pipeline 2 plays a role in conveying mixed gas, and the intake manifold 3 is used for conveying the mixed gas to a plurality of cylinders respectively so that the cylinders complete a combustion process.

The axial length of the intake manifold 3 is long, the distance from each cylinder to the intake pipe 2 is different, the cylinder closest to the intake pipe 2 is the first cylinder, the cylinder slightly far away from the intake pipe 2 is the second cylinder, and so on, and the sixth cylinder of the third cylinder and the sixth cylinder of the fourth cylinder … … are respectively defined. A first branch pipe 4 communicated with an air inlet of a first cylinder is arranged on the air inlet manifold 3, a second branch pipe 5 communicated with an air inlet of a second cylinder is arranged on the air inlet manifold 3, and the like, and a third branch pipe and a sixth branch pipe … … are respectively defined.

It will be appreciated that the homogeneity of the mixture entering the first cylinder is poor, since the distance between the first cylinder and the inlet line 2 and the mixer 1 is too small. Limited by the arrangement space, it is difficult to secure the uniformity of the mixing of the respective cylinders by solely relying on the mixer 1.

In order to solve the problem, the air intake system further comprises an insertion pipe 6, the insertion pipe 6 is of a straight pipe structure, the insertion pipe 6 is arranged at the joint between the air intake pipeline 2 and the air intake manifold 3, the air inlet of the insertion pipe 6 is arranged on the air intake pipeline 2 and communicated with the outlet of the air intake pipeline 2, and the air outlet of the insertion pipe 6 is arranged on the air intake manifold 3 and is positioned between the air intake pipeline 2 and the first cylinder.

The air intake system that this embodiment provided wears to locate air intake pipeline 2 and communicates in air intake pipeline 2's export through the air inlet that sets up grafting pipe 6, and grafting pipe 6 has played air intake pipeline 2's pipeline extension, and the pipeline is longer more, and the homogeneity that the mist mixes is better. The air outlet of the insertion pipe 6 is arranged in the air inlet manifold 3 in a penetrating way, which is equivalent to the fact that the insertion pipe 6 is added in the air inlet manifold 3, the appearance of the whole machine is not influenced, and the appearance is good. The gas outlet through setting up grafting pipe 6 is located between air inlet pipe 2 and the first cylinder for outside grafting pipe 6's gas outlet stretches out air inlet pipe 2, compare with prior art, the mist that flows out from blender 1 gets into in the first cylinder after air inlet pipe 2 and grafting pipe 6 in proper order, makes the mist that gets into in the first cylinder can realize intensive mixing, thereby satisfies the demand of engine homogeneous combustion.

If the length of the insertion pipe 6 is too long, although the uniformity of the mixed gas can be improved to a certain extent, if the insertion pipe 6 completely covers the air inlet of the first cylinder, at this time, the air outlet of the insertion pipe 6 exceeds the air inlet of the first cylinder, after the mixed gas flowing out of the insertion pipe 6 enters the air inlet manifold 3, part of the mixed gas flows backwards and can enter the air inlet of the first cylinder, and the air inflow of the mixed gas entering the first cylinder is reduced. To solve this problem, the plug-in tube 6 partially closes off the air inlet of the first branch tube 4. The insertion pipe 6 is not completely blocked at the air inlet of the first cylinder, so that a certain gap exists between the insertion pipe 6 and the air inlet, and the mixed gas flowing out of the insertion pipe 6 enters the air inlet of the first cylinder through the gap. By adopting the arrangement, the air inflow of the mixed gas can be ensured while the uniformity of the mixed gas is ensured.

Because the length of the splicing pipe 6 simultaneously affects two performance indexes of the uniformity and the air inflow of the mixed gas, in order to simultaneously take the two performance indexes into consideration, the length of the end face of the air outlet of the splicing pipe 6, which exceeds the middle axial face of the first branch pipe 4, is L, the diameter of the first branch pipe 4 is D, and the L is more than or equal to 0 and less than or equal to 10 percent of D, wherein the middle axial face is the middle axial face parallel to the end face of the splicing pipe 6. In other words, the end surface of the insertion pipe 6 reaches a position of about 50% -60% of the diameter of the air inlet of the first cylinder, and the insertion pipe 6 does not form a strong block to the air inlet of the first cylinder in the axial direction of the insertion pipe, so that nearly half of the area of the first cylinder in the radial direction of the first cylinder can be used for air intake of mixed gas, and the air intake amount of the first cylinder is not influenced.

After defining the length of the socket 6 in its axial direction, the radial dimension of the socket 6 needs to be defined. Preferably, as shown in fig. 2, the outer diameter of the plug pipe 6 is d1, the inner diameter of the intake manifold 3 is d2, and d1/d2 is equal to or less than 75%, so that a certain radial gap exists between the plug pipe 6 and the intake manifold 3, and the intake mass of the first cylinder or other cylinders is not affected.

The abscissa shown in fig. 3 has six groups, six groups representing six cylinders, C6 representing the first cylinder, C5 representing the second cylinder, and so on, C1 representing the sixth cylinder, the columnar marks on the left side of each group representing the state with the bayonet tube 6, the columnar marks on the right side of each group representing the state without the bayonet tube 6, and the ordinate representing the concentration difference of gas and air in the respective cylinders. Therefore, it can be clearly seen that when the first cylinder (i.e. C6) is not provided with the insertion pipe 6, the concentration difference between the gas and the air is large, which means that the mixed gas is not mixed sufficiently, and the concentration difference between the gas and the air is relatively small in the other cylinders compared with the first cylinder. When first cylinder when having grafting pipe 6, the concentration difference of gas and air obviously reduces, means that the homogeneity of gas mixture has obtained obvious promotion, and the gas of other cylinders and the concentration difference of air also reduce to a certain extent this moment, and the gas of other cylinders and first cylinder and the difference of the concentration difference of air are less.

The abscissa shown in fig. 4 has six groups, six groups representing six cylinders, C6 representing the first cylinder, C5 representing the second cylinder, and so on, C1 representing the sixth cylinder, the columnar marks on the left side of each group representing the state with the bayonet tube 6, the columnar marks on the right side of each group representing the state without the bayonet tube 6, and the ordinate representing the intake air amount of each cylinder. Therefore, it is clear that the intake air amount is almost the same for each cylinder in both the state with the bayonet tube 6 and the state without the bayonet tube 6.

Consequently, through emulation and experimental dual verification, through setting up the pipe 6 of pegging graft for six cylinders are guaranteeing that the air input is unchangeable almost the time, can also guarantee the homogeneity of mist, and the burning of first cylinder obviously promotes promptly, does not have the detonation problem, and the gas deviation of six cylinders reduces by a wide margin, has certain effect to the uniformity that improves each cylinder.

Further, as shown in fig. 1, the air intake pipeline 2 includes an air intake communicating pipe 21 and an air intake connecting pipe 22, one end of the air intake communicating pipe 21 is communicated with the mixer 1, the other end is communicated with the air intake connecting pipe 22, and the air intake communicating pipe 21 plays a role in intermediate communication. Preferably, the intake communicating pipe 21 has a bent pipe structure to realize the angle adjustment of the intake connecting pipe 22, thereby facilitating the arrangement of the installation space. The inserting pipe 6 penetrates through one end, far away from the mixer 1, of the air inlet connecting pipe 22, and the air inlet connecting pipe 22 plays a role in adapting the inserting pipe 6.

Optionally, a limiting groove is formed in the inner wall of the air inlet connecting pipe 22, the limiting groove is specifically of an annular groove structure, the limiting groove is used for limiting the axial direction of the insertion pipe 6, the insertion pipe 6 is prevented from moving along the axial direction of the air inlet connecting pipe 22, and therefore stability of the structural position of the insertion pipe 6 is guaranteed.

A throttle valve 7 is arranged between the air inlet communicating pipe 21 and the air inlet connecting pipe 22, the throttle valve 7 is a controllable valve for controlling the mixed gas to enter the air cylinder and is the throat of the automobile engine, so that the mixed gas is controlled to be introduced and closed, and the combustion process is completed. Optionally, the intake communicating pipe 21 is connected with the throttle valve 7 through the flange 8, so that the structure is simple, the use is convenient, and the installation and maintenance cost is low.

The embodiment also provides a vehicle, including engine and air intake system, air intake system communicates respectively in a plurality of cylinders of engine, and air intake system guarantees that the air intake concentration of each cylinder is unanimous to satisfy the demand of engine homogeneous combustion, avoid appearing engine knock, arrange the high scheduling problem of temperature, the safety in utilization is higher.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are based on the orientations and positional relationships shown in the drawings and are used for convenience in description and simplicity in operation, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An air intake system, comprising a mixer (1), an air intake pipe (2) and an air intake manifold (3), wherein the mixer (1) is used for mixing gas and air to form a mixed gas, the mixer (1) is communicated with the air intake manifold (3) through the air intake pipe (2), the air intake manifold (3) is used for respectively conveying the mixed gas to a plurality of cylinders, and the cylinder closest to the air intake pipe (2) is a first cylinder, the air intake system is characterized by further comprising:

the air inlet of the insertion pipe (6) penetrates through the air inlet pipeline (2) and is communicated with the outlet of the air inlet pipeline (2), and the air outlet of the insertion pipe (6) penetrates through the air inlet manifold (3) and is located between the air inlet pipeline (2) and the first cylinder.

2. An air inlet system according to claim 1, characterized in that a first branch pipe (4) is arranged on the inlet manifold (3) in communication with the inlet of the first cylinder, and the plug pipe (6) partially plugs the first branch pipe (4).

3. The air inlet system as claimed in claim 2, wherein the length of the end face of the air outlet of the plug pipe (6) exceeding the medial axial face of the first branch pipe (4) is L, the diameter of the first branch pipe (4) is D, and L is greater than or equal to 0 and less than or equal to 10% D, wherein the medial axial face is a medial axial face parallel to the end face of the plug pipe (6).

4. An air inlet system according to claim 1, characterized in that the outer diameter of the plug pipe (6) is d1 and the inner diameter of the inlet manifold (3) is d2, satisfying d1/d2 ≦ 75%.

5. The air intake system of claim 4, wherein the air intake pipeline (2) comprises an air intake communicating pipe (21) and an air intake connecting pipe (22), one end of the air intake communicating pipe (21) is communicated with the mixer (1), the other end of the air intake communicating pipe is communicated with the air intake connecting pipe (22), and the insertion pipe (6) is arranged at one end of the air intake connecting pipe (22) far away from the mixer (1).

6. The intake system according to claim 5, characterized in that a limiting groove is provided on the inner wall of the intake adapter (22), the limiting groove being used for axial limiting of the plug pipe (6).

7. An intake system according to claim 5, characterized in that a throttle valve (7) is provided between the intake communicating pipe (21) and the intake nipple (22).

8. The intake system according to claim 7, wherein the intake communicating pipe (21) and the throttle valve (7) are connected by a flange (8).

9. An air intake system according to claim 5, wherein the intake communicating tube (21) is of a bent tube structure.

10. A vehicle characterized by comprising an engine and an intake system according to any one of claims 1 to 9, which is communicated with a plurality of the cylinders of the engine, respectively.