CN114233533A

CN114233533A - EGR distributor

Info

Publication number: CN114233533A
Application number: CN202111487253.2A
Authority: CN
Inventors: 黄超; 张金铭; 连源
Original assignee: Chongqing Sokon Industry Group Co Ltd
Current assignee: Chongqing Sokon Industry Group Co Ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-03-25
Anticipated expiration: 2041-12-07
Also published as: CN114233533B

Abstract

The invention discloses an EGR (exhaust gas recirculation) distributor which comprises an EGR distributor, wherein the EGR distributor is provided with an air inlet channel and a mixing cavity, the mixing cavity is used for communicating an EGR waste gas interface and the air inlet channel, the air inlet channel is used for discharging gas in the mixing cavity, the mixing cavity is communicated with the air inlet channel through an air outlet, the air outlet direction of the air outlet and the air inlet direction of the air inlet channel form an included angle, fresh air and EGR waste gas can be mixed before entering an air inlet manifold, the mixing sufficiency is improved, the combustion sufficiency is improved, and the effects of EGR oil saving and emission are improved.

Description

EGR distributor

Technical Field

The invention relates to the field of EGR waste gas treatment, in particular to an EGR distributor.

Background

In the prior art, an engine Exhaust Gas Recirculation (EGR) technology refers to a technology in which a part of exhaust gas discharged from an engine is returned to an intake system and participates in combustion again together with a fresh air-fuel mixture. Exhaust gas recirculation technology can effectively improve the fuel economy of an engine and improve emission, and for a naturally aspirated engine and a high pressure EGR system, EGR exhaust gas needs to enter a cylinder through an intake manifold to participate in combustion.

The existing gasoline engine generally selects a manifold air inlet mode to introduce EGR gas into an air inlet manifold, the EGR gas enters a cylinder after being mixed with fresh air in an air inlet manifold pressure stabilizing cavity, waste gas in the EGR gas inlet mode needs to flow through the pressure stabilizing cavity, and the waste gas and the fresh air are not sufficiently mixed due to the existence of pressure difference, so that insufficient combustion is caused, the responsiveness and the flow loss of an EGR system are greatly influenced, and the effects of saving oil and discharging of the EGR are damaged.

Therefore, in order to solve the above problems, there is a need for an EGR distributor that can mix fresh air with EGR exhaust gas before entering an intake manifold, and improve the sufficiency of mixing, the sufficiency of combustion, and thus the fuel saving and emission effects of EGR.

Disclosure of Invention

In view of the above, the present invention is directed to overcome the drawbacks of the prior art, and to provide an EGR distributor capable of mixing fresh air with EGR exhaust gas before entering an intake manifold, and improving the mixing sufficiency and the combustion sufficiency, thereby improving the effects of saving fuel and discharging EGR.

According to the EGR distributor, the EGR distributor is provided with the air inlet channel and the mixing cavity, the mixing cavity is used for being communicated with the EGR waste gas interface and the air inlet channel, the air inlet channel is used for discharging gas in the mixing cavity, the mixing cavity is communicated with the air inlet channel through the air outlet, and an included angle is formed between the air outlet direction of the air outlet and the air inlet direction of the air inlet channel.

Furthermore, the mixing chamber is an annular chamber around the extending direction of the air inlet passage, and the air outlet is arranged on the radial side wall of the air inlet passage.

Further, be equipped with the reposition of redundant personnel portion that is used for blockking EGR waste gas and jets into the intake duct in the mixing chamber, reposition of redundant personnel portion sets up along the direction of giving vent to anger of EGR waste gas interface.

Further, the EGR distributor is provided with a distribution cavity, and a core body for dividing the distribution cavity is arranged in the distribution cavity; the core is the tube-shape, the intake duct is formed at the inner wall of core, the hybrid chamber is formed between the outer wall of core and the inner wall in distribution chamber.

Further, the core body protrudes inwards along the radial direction of the air inlet channel to form a neck region, and the neck region is annular around the extending direction of the air inlet channel.

Furthermore, the gas outlet is a plurality of, a plurality of the gas outlet is around the neck area that sets up that air inlet duct extending direction is cyclic annular distribution.

Further, the distribution chamber is a vertical through groove formed in the EGR distributor, the EGR exhaust gas passage is a horizontal through groove formed in the EGR distributor, the vertical through groove is communicated with the horizontal through groove, the core body is arranged in the vertical through groove, and the mixing chamber is formed between the outer wall of the core body and the outer wall of the vertical through groove along the radial direction.

Further, the vertical through groove is a columnar groove, the central axis of the vertical through groove coincides with the central axis of the core, the neck region is formed close to the upper part of the core along the axial direction, and a flow distribution part is formed on the side wall of the core along the air outlet direction of the EGR waste gas interface.

Furthermore, still connect crankcase waste gas interface and fuel steam interface on the hybrid chamber, crankcase waste gas interface, fuel steam interface and EGR waste gas interface do not lie in the same one side of intake duct simultaneously.

Furthermore, crankcase waste gas interface, fuel steam interface and EGR waste gas interface are parallel to each other, crankcase waste gas interface and fuel steam interface are located the same one side of intake duct, all correspond on crankcase waste gas interface and the fuel steam interface and be provided with respective check valve.

The invention has the beneficial effects that: the EGR distributor disclosed by the invention collects EGR waste gas in a centralized manner through the mixing cavity and discharges the EGR waste gas through the gas outlet communicated with the gas inlet, so that the waste gas sprayed from an EGR waste gas interface does not directly enter the gas inlet to be mixed with fresh air, but flows into the mixing cavity to be buffered and then spreads to the gas inlet to be mixed with the fresh air, an included angle is formed between the gas outlet direction of the gas outlet and the gas inlet direction of the gas inlet, the preferred included angle is 90 degrees, the mixing sufficiency is improved, and the combustion sufficiency is improved, so that the effects of saving oil and discharging the EGR are improved.

Drawings

The invention is further described below with reference to the following figures and examples:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 is a schematic side view of the present invention;

FIG. 5 is a schematic view of the structure of FIG. 3 taken along line A-A;

FIG. 6 is a schematic view of the structure of FIG. 4 along direction B-B; .

Detailed Description

Fig. 1 is a schematic structural diagram of the present invention, as shown in the drawing, the axial direction and the radial direction in this embodiment both refer to the axial direction and the radial direction of the core body in the case of fig. 5, and details are not repeated herein, where the EGR distributor 001 in this embodiment is provided with an air inlet channel 100 and a mixing cavity 200, the mixing cavity 200 is used to communicate the EGR exhaust interface 002 with the air inlet channel 100, the air inlet channel 100 is used to discharge the gas in the mixing cavity 200, the mixing cavity 200 is communicated with the air inlet channel 100 through an air outlet 007, and an included angle is formed between an air outlet direction of the air outlet 007 and an air inlet direction of the air inlet channel 100. Collect EGR waste gas through mixing chamber 200 in a concentrated way and discharge through the gas outlet 007 that communicates intake duct 100, make EGR waste gas interface 002 spun waste gas not directly enter intake duct 100 and fresh air mix, but it spreads again to intake duct 100 and fresh air mix after the buffering of mixing chamber 200 to gush into, and the direction of giving vent to anger of gas outlet 007 is the contained angle with the direction of admitting air of intake duct 100, this preferred contained angle is 90, improve the sufficiency of mixing, improve the sufficiency of burning, thereby improve the effect that EGR economized on fuel and discharged, this EGR distributor 001 links to each other with throttle valve and air intake manifold, to several kinds of gaseous intensive mixings, can let the gas mixture burning more abundant, be favorable to the fuel economy and the emission of engine.

In this embodiment, the mixing chamber 200 is an annular chamber around the extending direction of the air inlet duct 100, and the air outlet 007 is opened on the radial side wall of the air inlet duct 100. As shown in the figure, mixing chamber 200 is the annular around intake duct 100 extending direction, and intake duct 100 in this scheme is vertical form, and the loop configuration is located intake duct 100 and radially forms the encirclement to intake duct 100 to gas outlet 007 is seted up on the radial lateral wall of intake duct 100, further improves the degree of mixing with fresh air, and the mixing chamber of loop configuration still is favorable to the water conservancy diversion effect to EGR waste gas, reduces the speed of surging of EGR waste gas, improves the degree of mixing with fresh air.

In this embodiment, be equipped with in the mixing chamber 200 and be used for blockking that EGR waste gas jets into the reposition of redundant personnel portion 008 of intake duct 100, reposition of redundant personnel portion 008 sets up along the direction of giving vent to anger of EGR waste gas interface 002. As shown in the figure, reposition of redundant personnel portion 008 is just to the direction of giving vent to anger of EGR waste gas outlet 007 in this scheme, form in the lateral wall of core 006, reduce the manufacturing degree of difficulty, certainly reposition of redundant personnel portion 008 still can arrange in EGR waste gas interface 002 department or be located mixing chamber 200, be used for blockking that EGR waste gas jets into intake duct 100, no longer describe here, the reposition of redundant personnel portion 008 of formation on the lateral wall of core 006, make the core that is the tube-shape can accomplish the choked flow (block that EGR waste gas directly jets into and fresh air mixes), the reposition of redundant personnel (carry out the deceleration reposition of redundant personnel to the EGR waste gas that jets into in the mixing chamber), the water conservancy diversion (form the mixing chamber and play the water conservancy diversion to EGR waste gas) and the effect of mixing (carry out the intensive mixing through a plurality of gas outlets 007 and fresh air of seting up in the lateral wall of core).

In this embodiment, the EGR distributor 001 has a distribution cavity therein, and the distribution cavity has a core 006 separating the distribution cavities; core 006 is the tube-shape, intake duct 100 is formed at the inner wall of core 006, mixing chamber 200 is formed between the outer wall of core 006 and the inner wall of distribution chamber. Distribution chamber as shown in the figure is the column groove structure, core 006 is installed in distribution chamber, intake duct 100 is formed at the inner wall of core 006, and mixing chamber 200 is formed between the outer wall of core 006 and the inner wall of distribution chamber, moreover, the steam generator is simple in structure, and can make and possess the effect of radial buffering completely, and annular mixing chamber 200 is favorable to the deceleration of EGR waste gas still, do not directly mix with fresh gas, improve the sufficiency of mixing, of course the mixing chamber also can be installed on the EGR distributor and form the structure of connecting fresh air and EGR waste gas and giving vent to anger the end, no longer describe herein.

In this embodiment, the core 006 protrudes inward in the radial direction of the intake duct 100 to form a constricted region, which is annular in shape and extends around the intake duct 100. The setting of constriction region can accelerate throat department air current, reduces the pressure between throat department air current and the inner core wall, reduces EGR waste gas interface 002's pressure promptly to increase the pressure differential of EGR pipeline, improve EGR waste gas flow, the constriction region be close to the top of core along the intake duct axial, make the structure that is the curved arc face from bottom to top for the flow direction of gas is for following down and surging downwards along radial cross-section for from bottom to top and because inertia reason and wall are annular reason, make further reduce the velocity of flow that EGR waste gas gushed into to the hybrid chamber.

In this embodiment, gas outlet 007 is a plurality of, a plurality of gas outlet 007 is the seting up in the neck region that contracts of cyclic annular distribution around the 100 extending direction of air inlet duct, can make EGR waste gas and fresh air mix more evenly to this scheme has been seted up along two rows of axial, further improves the hybrid path of EGR waste gas and fresh air, and just as shown in the figure is not being provided with gas outlet 007 just to EGR waste gas exit, makes the core just to EGR waste gas exit formation reposition of redundant personnel portion 008.

In this embodiment, the distribution chamber is for offering the vertical logical groove on EGR distributor 001, EGR exhaust gas says for offering the horizontal logical groove on EGR distributor 001, vertical logical groove and horizontal logical groove are linked together, core 006 sets up in vertical logical inslot, and along radial mixing chamber 200 forms between the outer wall of core 006 and the outer wall of vertical logical groove, and the axial top of core as shown in the figure is installed on EGR distributor through four bushes, and the axial bottom of core directly stretches into in the air intake manifold and forms the intercommunication with it, improves compact structure.

In this embodiment, the vertical through groove is a cylindrical groove, the central axis of the vertical through groove coincides with the central axis of the core 006, the upper portion that the necking zone is close to the core 006 along the axial direction is formed, and the side wall of the core 006 forms the shunting part 008 along the direction of giving vent to anger of the EGR exhaust gas interface 002. The necking region as shown is close to the upper portion of core 006 along the axial for the impulsive force that has the backward flow of surging of EGR waste gas can reduce the velocity of flow that EGR waste gas jetted into mixing chamber 200, and mixing chamber 200 is the annular, can provide the runner for the EGR waste gas that gushes to mixing chamber 200, reduces its velocity of flow once more, makes EGR waste gas can be according to the flow of established route and discharge through gas outlet 007, improves the sufficiency of mixing.

In this embodiment, still connect crankcase waste gas interface 003 and fuel steam interface 004 on the hybrid chamber 200, crankcase waste gas interface 003, fuel steam interface 004 and EGR waste gas interface 002 do not lie in the same one side of intake duct 100 simultaneously, still integrated with crankcase waste gas interface on the EGR distributor 001, fuel steam interface and the mount pad 005 that is used for installing EGR temperature sensor, can reduce manufacturing cost and the degree of difficulty, and enable crankcase waste gas and fuel steam and fresh air mixture more evenly, improve exhaust gas utilization and can carry out intensive mixing to multiple waste gas.

In this embodiment, crankcase exhaust gas interface 003, fuel steam interface 004 and EGR exhaust gas interface 002 are parallel to each other, crankcase exhaust gas interface 003 and fuel steam interface 004 are located the same one side of intake duct 100, all correspond on crankcase exhaust gas interface 003 and the fuel steam interface 004 and be provided with respective check valve. As shown, the crankcase exhaust port 003 and the fuel vapor port 004 are integrated on the EGR distributor 001 on the opposite side to the EGR exhaust port 002, and the bottom of the core 006 is directly inserted into the intake manifold to be fixed thereto, thereby improving the compactness.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. An EGR distributor, characterized by: the EGR distributor is provided with an air inlet channel and a mixing cavity, the mixing cavity is used for communicating an EGR waste gas interface and the air inlet channel, the air inlet channel is used for discharging gas in the mixing cavity, the mixing cavity is communicated with the air inlet channel through an air outlet, and the air outlet direction is an included angle with the air inlet direction of the air inlet channel.

2. The EGR distributor of claim 1, wherein: the mixing chamber is an annular chamber around the extending direction of the air inlet passage, and the air outlet is arranged on the radial side wall of the air inlet passage.

3. The EGR distributor of claim 2, wherein: be equipped with the reposition of redundant personnel portion that is used for blockking EGR waste gas and jets into the intake duct in the mixing chamber, reposition of redundant personnel portion sets up along the direction of giving vent to anger of EGR waste gas interface.

4. The EGR distributor of claim 3, wherein: the EGR distributor is provided with a distribution cavity, and a core body for dividing the distribution cavity is arranged in the distribution cavity; the core is the tube-shape, the intake duct is formed at the inner wall of core, the hybrid chamber is formed between the outer wall of core and the inner wall in distribution chamber.

5. The EGR distributor of claim 4, wherein: the core body protrudes inwards along the radial direction of the air inlet channel to form a necking area, and the necking area is annular around the extending direction of the air inlet channel.

6. The EGR distributor of claim 5, wherein: the gas outlet is a plurality of, a plurality of the gas outlet is around the neck area of seting up in that air inlet duct extending direction is cyclic annular distribution.

7. The EGR distributor of claim 6, wherein: the distribution chamber is a vertical through groove arranged on the EGR distributor, the EGR exhaust gas passage is a horizontal through groove arranged on the EGR distributor, the vertical through groove is communicated with the horizontal through groove, the core body is arranged in the vertical through groove, and the mixing chamber is formed between the outer wall of the core body and the outer wall of the vertical through groove along the radial direction.

8. The EGR distributor of claim 7, wherein: the vertical through groove is a columnar groove, the central axis of the vertical through groove is coincident with the central axis of the core body, the neck region is formed close to the upper part of the core body along the axial direction, and a shunting part is formed on the side wall of the core body along the air outlet direction of the EGR waste gas interface.

9. The EGR distributor of claim 8, wherein: the mixing cavity is also connected with a crankcase waste gas interface and a fuel steam interface, and the crankcase waste gas interface, the fuel steam interface and the EGR waste gas interface are not positioned on the same side of the air inlet channel at the same time.

10. The EGR distributor of claim 1, wherein: crankcase waste gas interface, fuel steam interface and EGR waste gas interface are parallel to each other, crankcase waste gas interface and fuel steam interface are located the same one side of intake duct, all correspond on crankcase waste gas interface and the fuel steam interface and be provided with respective check valve.