CN204458106U

CN204458106U - EGR adapter and EGR gas mixing system

Info

Publication number: CN204458106U
Application number: CN201420815302.XU
Authority: CN
Inventors: 吴天亭
Original assignee: Beiqi Foton Motor Co Ltd
Current assignee: Beiqi Foton Motor Co Ltd
Priority date: 2014-12-19
Filing date: 2014-12-19
Publication date: 2015-07-08
Anticipated expiration: 2024-12-19

Abstract

The utility model discloses a kind of EGR to take over and EGR gas mixing system, the front end that wherein this EGR takes over is formed as round and smooth curved surface (10), this curved surface (10) is formed with relief opening (20).Therefore, the front end that EGR takes over is formed as round and smooth curved surface (10), and relief opening (20) is formed on this curved surface (10), therefore make to decrease intake resistance when fresh air and waste gas mixing, reduce motor pumping loss, be beneficial to the power performance ensureing motor, and when installing EGR adapter, can not scratch installation personnel, Security is high.

Description

EGR adapter and EGR gas mixing system

Technical field

The utility model relates to engine component technical field, particularly, relates to a kind of EGR and takes over and EGR gas mixing system.

Background technique

EGR is the abbreviation of EGR (Exhaust Gas Recirculation), and its principle is introduced in gas handling system by the waste gas after burning in right amount, again participates in burning, reduce cylinder temperature, thus reduce the discharge of nitrogen oxide.Because air velocity is fast, when within the limited time, waste gas enters intake manifold from EGR adapter often can not with air Homogeneous phase mixing, to cause in multicylinder engine EGR rate difference in each cylinder comparatively large, very large difficulty caused to emission control.

Mostly be inserted in suction tude by increasing by one section of pipeline of cutting sth. askew at EGR adapter end at present, to strengthen the mixed effect of air and waste gas, be blade-like owing to cutting angle, though there is edge chamfering, also may hurt assembly crewman, Security is low.In addition, this EGR adapter does not take into full account the trend of fluid, and increase intake resistance, mixed effect is not good, causes each cylinder EGR gas homogeneity poor.

Model utility content

An object of the present utility model is to provide a kind of EGR and takes over, and this EGR adapter Security is high, and assembly crewman can be protected to avoid scratch.

Another object of the present utility model is to provide a kind of EGR gas mixing system, and this EGR gas mixing system comprises the EGR adapter that the utility model provides.

To achieve these goals, according to an aspect of the present utility model, provide a kind of EGR to take over, wherein, the front end that this EGR takes over is formed as round and smooth curved surface, and this curved surface is formed with relief opening.

Preferably, described curved surface is hemisphere.

Preferably, described relief opening is formed as slit, or the multiple holes be arranged in order.

Preferably, the in-line that the diametric(al) that described slit is formed as taking over along described EGR extends.

Preferably, described slit comprises the first groove and second groove of the radial direction extension of taking over along described EGR, and the angle between this first groove and second groove is greater than 90 degree and is less than 180 degree.

According to another aspect of the present utility model, provide a kind of EGR gas mixing system, this EGR gas mixing system comprises suction tude and EGR adapter, and wherein, the EGR adapter that described EGR adapter provides for the utility model, this EGR adapter is inserted in described suction tude.

Preferably, the outermost end of described EGR adapter extends to the shaft core position of described suction tude.

Preferably, described relief opening is formed as slit, the in-line that the diametric(al) that described slit is formed as taking over along described EGR extends, and perpendicular to the airintake direction in described suction tude.

Preferably, described relief opening is formed as slit, described slit comprises the first groove and second groove of the radial direction extension of taking over along described EGR, and the angle between this first groove and second groove is greater than 90 degree and is less than 180 degree, and this angle is relative with the airintake direction in described suction tude.

Pass through technique scheme, the front end that EGR takes over is formed as round and smooth curved surface, and relief opening is formed on this curved surface, therefore make to decrease intake resistance when fresh air and waste gas mixing, reduce motor pumping loss, be beneficial to the power performance ensureing motor, and when installing EGR adapter, can not scratch installation personnel, Security is high.

Other feature and advantage of the present utility model are described in detail in embodiment part subsequently.

Accompanying drawing explanation

Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, but does not form restriction of the present utility model with embodiment one below.In the accompanying drawings:

Fig. 1 is the part-structure schematic diagram of the EGR gas mixing system that the utility model preferred implementation provides;

Fig. 2 is the sectional structure schematic diagram intercepted along the line A-A in Fig. 1;

Fig. 3 is the plan structure schematic diagram of the EGR adapter that the utility model preferred implementation provides.

Description of reference numerals

10 curved surfaces

20 relief opening 21 first groove 22 second grooves

23 slits

30 suction tude

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the utility model, is not limited to the utility model.

In the utility model, when not doing contrary explanation, the noun of locality of use as." inside and outside " refers to the interior and outer of corresponding part profile.

As depicted in figs. 1 and 2, the utility model provides a kind of EGR to take over, and wherein, the front end that this EGR takes over is formed as round and smooth curved surface 10, and this curved surface 10 is formed with relief opening 20.

This curved surface 10 can be various shape, such as taper, tubaeform, oval etc., and the round and smooth curved surface 10 of any desired configuration all belongs within protection domain of the present utility model, and the utility model does not limit this.

As central scope of the present utility model, be by traditional EGR is taken over sharp-pointed end, change round and smooth curved surface 10 into, therefore make to decrease intake resistance when fresh air and waste gas mixing, save engine power, and when installing EGR adapter, can not scratch installation personnel, Security is high.

As in structure preferably, as depicted in figs. 1 and 2, this curved surface 10 is hemisphere; therefore, it is possible to greatly reduce the intake resistance of fresh air, reduce motor pumping loss; be beneficial to the power performance ensureing motor, in addition, can installation personnel protected well to avoid scratch.

Further, for strengthening the mixed effect of fresh air and waste gas, make the two mixing more fully, evenly, as shown in Figure 3, multiple holes that this relief opening 20 is formed as slit 23 or arranges according to this.Due to slit 23 and multiple multiple holes arranged according to this, the incorporation time of air and fresh air can be extended, and increase the surface of contact of the two, be beneficial to the mixing of gas.

The preferred arrangement of one as slit 23, the yi word pattern that the diametric(al) that this slit 23 is formed as taking over along this EGR extends, that is, hemispheric curved surface 10 is divided into identical two-part by slit 23, the flow-disturbing of waste gas and fresh air can be increased, allow gas and vapor permeation evenly.

The preferred arrangement of another kind as slit 23, as shown in Figure 3, this slit 23 comprises the first groove 21 and the second groove 22 of the radial direction extension of taking over along this EGR, and the angle between this first groove 21 and second groove 22 is greater than 90 degree and is less than 180 degree.Similarly, add the flow-disturbing of live gas and waste gas, be beneficial to gas and vapor permeation.

According to another aspect of the present utility model, provide a kind of EGR gas mixing system, as depicted in figs. 1 and 2, this EGR gas mixing system comprises suction tude 30 and EGR adapter, wherein, this EGR takes over the above-mentioned EGR adapter for the utility model provides, and this EGR adapter is inserted in this suction tude 30.Therefore, this EGR gas mixing system can protect installation personnel to avoid scratch well, and saves engine power.

Preferably, in order to the waste gas and fresh air that make backflow mix more even, the outermost end that this EGR takes over extends to the shaft core position of this suction tude 30, that is, the end being inserted into the part of suction tude 30 that this EGR takes over is positioned at the home position of the cross section of suction tude 30.Because the air-flow velocity of the pipeline central position of suction tude 30 is the fastest, be more beneficial to the mixing of mixed gas, therefore by EGR adapter, waste gas guided to the fastest region of fresh airflow rate, can well the two be mixed.

As a kind of preferred implementation of EGR gas mixing system, for increasing the flow-disturbing of gas, reduce the combustion efficiency difference of each cylinder of motor, reduce the discharge of nitrogen oxide, the yi word pattern that the diametric(al) that this slit 23 is formed as taking over along this EGR extends, and perpendicular to the airintake direction in this suction tude 30.Therefore, when fresh air is by this curved surface 10, can mix with waste gas with Maximum Contact area, ensure mixing efficiency.

As the another kind of preferred implementation of EGR gas mixing system, as shown in Figure 3, this slit 23 comprises the first groove 21 and the second groove 22 of the radial direction extension of taking over along this EGR, angle between this first groove 21 and second groove 22 is greater than 90 degree and is less than 180 degree, and this angle is relative with the airintake direction in this suction tude 30.That is, slit 23 is positioned at the front of air-flow direction of advance, can extend the incorporation time of waste gas and fresh air, can increase the flow-disturbing of waste gas and fresh air simultaneously, make each cylinder gas and vapor permeation of motor evenly, and be beneficial to discharge.

Certain slit 23 according to the actual requirements, can extend to the madial wall place of suction tude 30, and to increase the area of contact of fresh air and waste gas, be more conducive to mixing, the utility model does not limit this, all belongs to protection domain of the present utility model.

Below preferred implementation of the present utility model is described by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.

It should be noted that in addition, each concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the utility model illustrates no longer separately to various possible compound mode.

In addition, also can carry out combination in any between various different mode of execution of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.

Claims

1. an EGR adapter, it is characterized in that, the front end that this EGR takes over is formed as round and smooth curved surface (10), this curved surface (10) is formed with relief opening (20).

2. EGR adapter according to claim 1, it is characterized in that, described curved surface (10) is hemisphere.

3. EGR adapter according to claim 2, it is characterized in that, described relief opening (20) is formed as slit (23), or the multiple holes be arranged in order.

4. EGR adapter according to claim 3, is characterized in that, the in-line that the diametric(al) that described slit (23) is formed as taking over along described EGR extends.

5. EGR adapter according to claim 3, it is characterized in that, described slit (23) comprises the first groove (21) and second groove (22) of the radial direction extension of taking over along described EGR, and the angle between this first groove (21) and second groove (22) is greater than 90 degree and is less than 180 degree.

6. an EGR gas mixing system, comprises suction tude (30) and EGR adapter, it is characterized in that, described EGR adapter is EGR adapter according to claim 1 and 2, and this EGR adapter is inserted in described suction tude (30).

7. EGR gas mixing system according to claim 6, is characterized in that, the outermost end of described EGR adapter extends to the shaft core position of described suction tude (30).

8. EGR gas mixing system according to claim 6, it is characterized in that, described relief opening (20) is formed as slit (23), the in-line that the diametric(al) that described slit (23) is formed as taking over along described EGR extends, and perpendicular to the airintake direction in described suction tude (30).

9. EGR gas mixing system according to claim 6, it is characterized in that, described relief opening (20) is formed as slit (23), described slit (23) comprises the first groove (21) and second groove (22) of the radial direction extension of taking over along described EGR, angle between this first groove (21) and second groove (22) is greater than 90 degree and is less than 180 degree, and this angle is relative with the airintake direction in described suction tude (30).