CN215213733U

CN215213733U - Engine air intake system and vehicle

Info

Publication number: CN215213733U
Application number: CN202120951739.6U
Authority: CN
Inventors: 邓灵灵; 李文庆; 时双; 李红政; 王闯; 王晨春; 刘俊士; 谭永刚; 蒋辉; 张新文
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2021-12-17
Anticipated expiration: 2031-05-06

Abstract

The utility model discloses an engine air intake system and vehicle, wherein engine air intake system includes: an air inlet pipe assembly and an exhaust gas recirculation air outlet pipe. An air inlet channel is arranged in the air inlet pipe assembly; the section of stretching into of exhaust gas recirculation outlet duct stretches into in the inlet channel, stretch into and seted up two gas outlets on the perisporium of section, two be "V" shape between the gas outlet and the axis that stretches into the section and arrange, every the gas outlet with inlet channel's axis distance equals, and every the direction of giving vent to anger of gas outlet with contained angle between the direction of admitting air of intake pipe assembly is the acute angle. The engine air inlet system can evenly convey fully-mixed gas to each cylinder of the engine, so that the air inlet consistency and the combustion consistency of each cylinder of the engine are improved, and the pollutant discharge amount of the whole vehicle is reduced.

Description

Engine air intake system and vehicle

Technical Field

The utility model relates to a vehicle technical field particularly, relates to an engine air intake system and vehicle.

Background

In the prior art, air inflow among all cylinders of an engine is uneven, so that combustion in all cylinders is inconsistent, air inflow consistency and combustion consistency of the engine are poor, pollutant discharge amount of the whole vehicle is large, and an improvement space exists.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an engine air intake system, this engine air intake system can be even carry intensive mixing's mist to each cylinder of engine to make the uniformity of admitting air and the combustion uniformity of each cylinder of engine obtain improving, and then reduced the pollutant emission of whole car.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

an engine air intake system comprising: the air inlet pipe assembly is internally provided with an air inlet channel; the exhaust gas recirculation outlet duct, the section of stretching into of exhaust gas recirculation outlet duct stretches into in the inlet channel, stretch into and seted up two gas outlets, two on the perisporium of section the gas outlet is arranged with stretching into to be "V" shape between the axis of section, every the gas outlet with inlet channel's axis distance equals, and every the direction of giving vent to anger of gas outlet with contained angle between the inlet direction of intake pipe assembly is the acute angle.

Furthermore, the included angle between the central axes of the two air outlets is alpha, and alpha is more than or equal to 100 degrees and less than or equal to 120 degrees.

Further, α is 110 °.

Further, the air outlet is formed in a square structure.

Furthermore, the side length of the air outlet is D, and D is more than or equal to 13mm and less than or equal to 15 mm.

Further, the intake pipe assembly includes: the exhaust gas recirculation air outlet pipe is communicated with the throttle valve assembly through the air inlet connecting pipe.

Further, the air inlet connecting pipe is constructed as a metal pipe, and the extending section is in sealing fit with the pipe wall of the air inlet connecting pipe and extends into the air inlet connecting pipe.

Further, the air inlet connecting pipe is constructed as a bent pipe, so that the air outlet and the air outlet end of the throttle valve assembly are arranged in a staggered mode.

Furthermore, the ratio of the diameter of the air inlet connecting pipe to the length of the extending section is a, and a is more than or equal to 1.5 and less than or equal to 1.7.

Compared with the prior art, engine air intake system have following advantage:

engine air intake system, this engine air intake system can be even carry intensive mixing's mist to each cylinder of engine to make the uniformity of admitting air and the combustion uniformity of each cylinder of engine obtain improving, and then reduced the pollutant emission of whole car.

Another object of the present invention is to provide a vehicle, including the above-mentioned engine intake system, the vehicle has less overall pollutant discharge.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a cross-sectional view of an engine air intake system according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an engine air intake system according to an embodiment of the present disclosure;

FIG. 3 is a partial exploded view of an engine air intake system according to an embodiment of the present disclosure;

FIG. 4 is a schematic illustration of a partial configuration of an engine air intake system according to an embodiment of the present disclosure;

FIG. 5 is a schematic illustration of a partial configuration of an engine air intake system according to an embodiment of the present disclosure;

fig. 6 is a schematic structural view of an extending section of an exhaust gas recirculation outlet pipe according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an extending section of an exhaust gas recirculation outlet pipe according to the embodiment of the present invention.

Description of reference numerals:

100-an engine air inlet system, 1-an air inlet pipe assembly, 11-an air inlet channel, 12-an air inlet manifold, 13-an air inlet connecting pipe, 2-an exhaust gas recirculation air outlet pipe, 21-an extending section, 211-an air outlet, 3-a sealing gasket and 4-a throttle valve assembly.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

An engine intake system 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 7.

According to the utility model discloses engine air intake system 100 can include: an air inlet pipe assembly 1 and an exhaust gas recirculation outlet pipe 2.

As shown in fig. 1-3, the intake pipe assembly 1 has an intake passage 11 therein, and the protruding section 21 of the exhaust gas recirculation outlet pipe 2 protrudes into the intake passage 11 to return part of the exhaust gas generated by the engine to the intake pipe assembly 1 through the exhaust gas recirculation system, and the protruding section 21 of the exhaust gas recirculation outlet pipe 2 protruding into the intake pipe assembly 1 introduces the exhaust gas into the intake passage 11 of the intake pipe assembly 1, mixes with the fresh air entering from the throttle valve assembly 4, and reenters the engine, so that the fuel in the engine is more sufficient, and the purpose of reducing the emission of pollutants is achieved.

The traditional engine air inlet system can lead air inlet among all air cylinders of the engine to be uneven, so that combustion in all the air cylinders is inconsistent, air inlet consistency and combustion consistency of the engine are poor, and pollutant discharge amount of the whole vehicle is large. Therefore, the embodiment of the utility model provides a design can be even to each cylinder of engine carry gas mixture's engine air intake system 100 to reach the purpose that increases the homogeneity of admitting air and the burning uniformity between each cylinder of engine, thereby can reduce the pollutant emission of whole car.

Wherein, two gas outlets 211 have been seted up on the perisporium that stretches into section 21 of exhaust gas recirculation outlet duct 2, be "V" shape between two gas outlets 211 and the axis that stretches into section 21 and arrange (refer to fig. 6), every gas outlet 211 is equal with the axis distance of inlet channel 11, distance C in fig. 3, and the contained angle between the direction of giving vent to anger of every gas outlet 211 and the direction of admitting air of intake pipe assembly 1 (fresh air) is the acute angle, and two contained angles are equal, as contained angle A in fig. 3 and the direction of giving vent to anger in fig. 5. That is, two gas outlets 211 are axisymmetric, so that the gas outlet of two gas outlets 211 is more even, and make waste gas respectively blow into the air inlet channel 11 through two gas outlets 211, so as to promote the uniformity of air inlet, and can make the granule in the waste gas discharged from the gas outlet 211 of the waste gas recirculation outlet pipe 2 further flow to the direction far away from the throttle valve assembly 4 under the effect of atmospheric pressure, thereby further avoid piling up at the throttle valve assembly 4 the granule in the waste gas discharged from the gas outlet 211 of the waste gas recirculation outlet pipe 2, and can also make the gas mixture more sufficient, and then make the gas input to each cylinder of the engine from the air inlet pipe assembly 1 more even.

That is, both air outlets 211 are disposed on a side wall of the protruding section 21 facing away from the fresh air intake direction, and the two air outlets 211 are symmetrically disposed. Therefore, the air flows discharged from the air outlets 211 on the two sides have the same size and the air outlet directions are symmetrical, so that the air input into each cylinder of the engine from the engine air inlet system 100 is more uniform, and the combustion in each cylinder is more uniform.

According to the utility model discloses engine air intake system 100, this engine air intake system 100 can be even carry intensive mixing's mist to each cylinder of engine to make the uniformity of admitting air and the combustion uniformity of each cylinder of engine obtain improving, and then reduced the pollutant emission of whole car.

According to some embodiments of the present invention, the included angle between the central axes of the two gas outlets 211 is α, and α is greater than or equal to 100 ° and less than or equal to 120 °. That is, the included angle between the central axes of the two air outlets 211 is controlled to be between 100 ° and 120 ° so that the exhaust gas discharged from the two air outlets 211 can be mixed with fresh air more uniformly, and further the air inlet consistency of the engine is ensured.

Preferably, α is 110 ° (see fig. 6). I.e., the angle between the central axes of the two outlet ports 211 is defined to be 110 °. In the case of this angle, the intake uniformity of the engine is optimized.

As shown in fig. 7, the air outlet 211 is formed in a square structure. Because the size of the air flow flowing out from the edges of the four sides of the square structure is equal, the air outlet 211 is designed to be of the square structure, and the air inlet consistency among the cylinders of the engine can be further ensured.

Furthermore, the side length of the air outlet 211 is D, and D is more than or equal to 13mm and less than or equal to 15 mm. I.e., the side length of the air outlet 211 is controlled between 13mm and 15mm, to control the size of the air outlet 211 within a reasonable range. Preferably, D ═ 14 mm.

In conjunction with the embodiment shown in fig. 1 and 2, the intake pipe assembly 1 includes: an intake manifold 12 and an intake adapter 13, wherein the intake adapter 13 is communicated between the intake manifold 12 and the throttle valve assembly 4, and the exhaust gas recirculation outlet pipe 2 is communicated with the throttle valve assembly 4 through the intake adapter 13 to increase the distance between the intake manifold 12 and the throttle valve assembly 4. That is to say, the embodiment of the utility model provides an add the takeover 13 that admits air between intake manifold 12 and throttle valve assembly 4, so that exhaust gas recirculation outlet duct 2 need be through admitting air takeover 13 just can communicate with throttle valve assembly 4, the distance between the end of giving vent to anger of gas outlet 211 of exhaust gas recirculation outlet duct 2 and throttle valve assembly 4 has obtained the increase promptly, thereby make the fresh air who gets into from throttle valve assembly 4 have abundant space and time and waste gas homogeneous mixing, and the air current of fresh air can fully wash away the granule in order to take away waste gas with backward flow waste gas, in order to avoid the emergence of waste gas backward flow phenomenon, thereby avoided the granule to pile up in throttle valve assembly 4, and then improved engine air intake system 100's reliability and security.

In other words, the distance between the outlet 211 of the exhaust gas recirculation outlet pipe 2 and the outlet end of the throttle valve assembly 4 can be increased by adding the intake adapter 13. Therefore, the carbon deposition phenomenon at the throttle valve assembly 4 can be effectively avoided, so that the throttle valve assembly 4 can be normally opened and closed and the opening size can be adjusted, and the stability of the engine air intake system 100 is improved.

Further, the intake adapter 13 is configured as a metal tube, for example, an aluminum tube, and the protruding section 21 is in sealing fit with the wall of the intake adapter 13 and protrudes into the intake adapter 13. Namely, the air outlet 211 of the exhaust gas recirculation outlet pipe 2 is directly communicated with the air inlet connecting pipe 13. Because the exhaust gas temperature discharged from the air outlet 211 is relatively high, the exhaust gas with relatively high temperature is directly discharged into the intake manifold 12 made of a plastic material, and the intake manifold 1 is ablated to damage the intake manifold 12, thereby resulting in relatively low reliability and safety of the engine intake system 100. The air inlet connecting pipe 13 is constructed as a metal pipe, and the air outlet 211 of the exhaust gas recirculation air outlet pipe 2 directly extends into the air inlet connecting pipe 13, so that exhaust gas with higher temperature directly impacts the metal pipe instead of the air inlet manifold 12, and the air inlet manifold 12 can be effectively protected, therefore, the damage to the air inlet manifold 12 can be further avoided on the basis of ensuring the light weight of the engine air inlet system 100, and the reliability and the safety of the engine air inlet system 100 are further improved.

Wherein, the peripheral wall of the air inlet connecting pipe 13 is provided with an insertion opening of the extending section so as to be connected with the extending section 21. That is, the protruding section 21 of the exhaust gas recirculation outlet pipe 2 is adapted to pass through a protruding section insertion opening opened on the peripheral wall of the intake adapter 13 to protrude into the inside of the intake adapter 13 so as to exhaust the gas to the inside of the intake adapter 13.

And the mounting seat on the exhaust gas recirculation outlet pipe 2 is suitable for being mounted in a matching way with the mounting seat on the peripheral wall of the air inlet connecting pipe 13 so as to fix the extending section 21 of the exhaust gas recirculation outlet pipe 2 on the air inlet connecting pipe 13, and the extending section 21 is in sealing matching with the pipe wall of the air inlet connecting pipe 13 through the sealing gasket 3 (refer to fig. 4).

Furthermore, the air inlet connecting pipe 13 is constructed as a bent pipe, so that the air outlet 211 and the air outlet end of the throttle valve assembly 4 are arranged in a staggered manner, that is, the air outlet 211 of the exhaust gas recirculation air outlet pipe 2 and the air outlet end of the throttle valve assembly 4 are not arranged in an aligned manner, therefore, particles in the exhaust gas can not directly fall to the throttle valve assembly 4 due to the action of gravity, but can collide with the pipe wall of the air inlet connecting pipe 13 to play the roles of slowing down the falling speed of the particles and buffering, so that sufficient time is reserved for fresh air to impact and take away the particles, and the throttle valve assembly 4 can be further prevented from being stuck by carbon deposition.

As a preferred embodiment, the ratio of the diameter of the air inlet connecting pipe 13 to the length of the inlet section 21 is a, 1.5. ltoreq. a.ltoreq.1.7. Such as the ratio between L and S in fig. 1. Namely, the ratio of the diameter of the air inlet connecting pipe 13 to the length of the extending section 21 is controlled to be 1.5 to 1.7, so as to reasonably set the size of the air outlet 211 on the premise of ensuring the fresh air inlet efficiency. Preferably, a is 1.6.

According to another aspect of the present invention, a vehicle includes the engine intake system 100 described in the above embodiments. Other configurations of vehicles, such as brake systems and the like, are known in the art and are well known to those skilled in the art, and therefore, are not described in detail herein.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An engine air intake system (100), comprising:

the air inlet pipe assembly (1), wherein an air inlet channel (11) is arranged in the air inlet pipe assembly (1);

exhaust gas recirculation outlet duct (2), the section (21) of stretching into of exhaust gas recirculation outlet duct (2) stretches into in inlet channel (11), two gas outlets (211) have been seted up on the perisporium of the section (21) of stretching into, two gas outlet (211) and stretch into and be "V" shape between the axis of section (21) and arrange, every gas outlet (211) with the axis distance of inlet channel (11) equals, and every the direction of giving vent to anger of gas outlet (211) with contained angle between the direction of admitting air of intake pipe assembly (1) is the acute angle.

2. The engine intake system (100) according to claim 1, wherein an angle between central axes of the two outlet ports (211) is α, 100 ° α or more and 120 ° or less.

3. The engine intake system (100) of claim 2, wherein α is 110 °.

4. The engine intake system (100) of claim 1, wherein the air outlet (211) is formed in a square configuration.

5. The engine intake system (100) of claim 4, wherein the side length of the outlet port (211) is D, 13mm ≦ D ≦ 15 mm.

6. The engine intake system (100) according to claim 1, characterized in that the intake pipe assembly (1) includes: the exhaust gas recirculation system comprises an intake manifold (12) and an intake connecting pipe (13), wherein the intake connecting pipe (13) is communicated between the intake manifold (12) and a throttle valve assembly (4), and the exhaust gas recirculation outlet pipe (2) is communicated with the throttle valve assembly (4) through the intake connecting pipe (13).

7. The engine intake system (100) according to claim 6, characterized in that the intake nipple (13) is configured as a metal tube, and the protruding section (21) is in sealing fit with a tube wall of the intake nipple (13) and protrudes into the intake nipple (13).

8. The engine intake system (100) according to claim 6, wherein the intake nipple (13) is configured as an elbow so that the air outlet (211) is disposed offset from an air outlet end of the throttle valve assembly (4).

9. The engine intake system (100) according to claim 7, characterized in that the ratio between the diameter of the intake nipple (13) and the length of the protruding section (21) is a, 1.5 ≦ a ≦ 1.7.

10. A vehicle, characterized by comprising an engine air intake system (100) according to any one of claims 1-9.