CN107559106A - A kind of egr system and its mixed admission structure - Google Patents
A kind of egr system and its mixed admission structure Download PDFInfo
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- CN107559106A CN107559106A CN201711041273.0A CN201711041273A CN107559106A CN 107559106 A CN107559106 A CN 107559106A CN 201711041273 A CN201711041273 A CN 201711041273A CN 107559106 A CN107559106 A CN 107559106A
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- flue gas
- air inlet
- gas leading
- inlet pipe
- pipe
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Abstract
This application discloses a kind of egr system and its mixed admission structure, wherein, mixed admission structure includes air inlet pipe and flue gas leading, the mouth of pipe of air inlet pipe is placed in flue gas leading, ring-type passage gaps are formed between air inlet pipe and flue gas leading, and the rear portion of the mouth of pipe positioned at air inlet pipe of flue gas leading is provided with divergent segment.During work, flue gas leading takes waste gas before the turbine of engine escape pipe, and waste gas enters flue gas leading, and the divergent segment of flue gas leading is entered by ring-type passage gaps, and waste gas mixes with the fresh air come in from air inlet pipe in divergent segment, enters together in engine after mixing.Due to forming ring-type passage gaps and divergent segment in flue gas leading, therefore, larger pressure drop between ring-type passage gaps and divergent segment be present, i.e. waste gas is surveyed to form larger pressure difference in the air inlet side and outlet of flue gas leading, the driving pressure difference of egr system is substantially increased by the mixed admission structure, simultaneously, it is not necessary to increase oil consumption, will not also increase the pumping loss of engine.
Description
Technical field
The present invention relates to technical field of engines, the mixed admission structure of more particularly to a kind of egr system.Further relate to one kind
Include the egr system of the mixed admission structure.
Background technology
In order to meet increasingly strict Abgasgesetz, engine is EGR technology by the major technique that NOx is reduced in cylinder.
EGR technology is that the waste gas of engine discharge is incorporated into engine to participate in burning again, and playing reduces oxygen concentration and burning
The effect of temperature, so as to reduce the generation of nitrogen oxides.
High pressure EGR technology is a kind of implementation of EGR technology, and high pressure EGR system is from engine supercharger turbine
Before take waste gas, waste gas returns to engine air inlet tube by parts such as cooler for recycled exhaust gas, EGR valves, is mixed with new charge.And high pressure
Egr system needs pressure and admission pressure difference before larger whirlpool, certainly will so cause the increase of engine pumping loss, from
And increase oil consumption.
In summary, how to solve the problem of engine pumping loss of high pressure EGR system is larger, and oil consumption is larger, turn into
Those skilled in the art urgent problems to be solved.
The content of the invention
In view of this, it is an object of the invention to provide a kind of mixed admission structure of egr system, to start not increasing
While machine pumping loss and oil consumption, pressure and admission pressure difference before whirlpool are improved.
It is another object of the present invention to provide a kind of egr system using the mixed admission structure, not increase
While engine pumping loss and oil consumption, pressure and admission pressure difference before whirlpool are improved.
To reach above-mentioned purpose, the present invention provides following technical scheme：
A kind of mixed admission structure of egr system, including for being passed through the air inlet pipe of fresh air and for from turbine
Before take the flue gas leading of waste gas, the mouth of pipe of the air inlet pipe is placed in the flue gas leading, between the air inlet pipe and the flue gas leading
Ring-type passage gaps are formed, and the rear portion of the mouth of pipe positioned at the air inlet pipe of the flue gas leading is provided with divergent segment.
Preferably, in above-mentioned mixed admission structure, the pipeline section to be crossed with the air inlet pipe of the flue gas leading is vertical
Straight bend loss, the normal bend section include orthogonal first bend loss and the second bend loss, on second bend loss
The divergent segment is provided with, first bend loss is vertical with the air inlet pipe.
Present invention also provides a kind of egr system, including engine, booster, air inlet pipe, escape pipe and flue gas leading, institute
Two turbines for stating booster are respectively arranged in the air inlet pipe and the escape pipe, and one end of the flue gas leading is connected to
The position being located at before the turbine of the escape pipe, the air inlet pipe of the other end of the flue gas leading and the engine connect
Logical, the flue gas leading and the air inlet pipe are using the mixed admission structure as described in any of the above item, the outlet of the flue gas leading
It is connected with the air inlet of the engine.
Compared with prior art, the beneficial effects of the invention are as follows：
The mixed admission structure of egr system provided by the invention, the mouth of pipe of air inlet pipe are placed in flue gas leading, and air inlet pipe is with giving up
Ring-type passage gaps are formed between tracheae, and flue gas leading positioned at the position at air inlet pipe mouth of pipe rear portion is provided with divergent segment.Work
When, flue gas leading takes waste gas before the turbine of engine escape pipe, and waste gas circulates through flue gas leading, and passes through flue gas leading and air inlet pipe
Between ring-type passage gaps enter the divergent segment of flue gas leading, waste gas mixes with the fresh air come in from air inlet pipe in divergent segment
Close, enter together in engine after mixing.Due to forming ring-type passage gaps and divergent segment in flue gas leading, therefore, ring-type circulation
Larger pressure drop between gap and divergent segment, i.e. waste gas survey to form larger pressure difference in the air inlet side and outlet of flue gas leading, the pressure
Difference is the driving pressure difference of egr system, and the driving pressure difference of egr system is substantially increased by the mixed admission structure, meanwhile, no
Need to increase oil consumption, will not also increase the pumping loss of engine.
Egr system provided by the invention employs the mixed admission structure in the application, therefore, starts that need not increase
Engine oil consumption and in the case of not increasing engine pumping loss, the difference between pressure and admission pressure before whirlpool is improved, that is, is increased
Driving pressure difference is added.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of structural representation of the mixed admission structure of egr system provided in an embodiment of the present invention；
Fig. 2 is a kind of structural representation of egr system provided in an embodiment of the present invention.
Wherein, 1 it is flue gas leading, 11 be the first bend loss, 111 be ring-type passage gaps, 12 be the second bend loss, 121 is
Divergent segment, 2 be air inlet pipe, 3 be engine, 4 be charge air cooler, 5 be EGR valve, 6 be booster, 61 be turbine, 7 be escape pipe.
Embodiment
The core of the present invention there is provided a kind of mixed admission structure of egr system, can not increase engine pump gas
While loss and oil consumption, pressure and admission pressure difference before whirlpool are improved.
Present invention also offers a kind of egr system using the mixed admission structure, can not increase engine pump gas
While loss and oil consumption, pressure and admission pressure difference before whirlpool are improved.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Fig. 1 is refer to, the embodiments of the invention provide a kind of mixed admission structure of egr system, is hereinafter referred to as mixed into
Depressed structure, it includes air inlet pipe 2 and flue gas leading 1, wherein, air inlet pipe 2 is used to be passed through fresh air, flue gas leading 1 into engine 3
For taking waste gas before the turbine 61 of the escape pipe 7 of engine 3, the mouth of pipe of air inlet pipe 2 is placed in flue gas leading 1, air inlet pipe 2 with
Ring-type passage gaps 111 are formed between flue gas leading 1, and the rear portion of the mouth of pipe positioned at air inlet pipe 1 of flue gas leading 2 is provided with divergent segment
121。
The operation principle of the mixed admission structure is：During work, turbine 61 of the flue gas leading 1 from the escape pipe 7 of engine 3
Before take waste gas, waste gas circulates through flue gas leading 1, and the ring-type passage gaps 111 by being formed between flue gas leading 1 and air inlet pipe 2 enter
Enter the divergent segment 121 of flue gas leading 1, waste gas mixes with the fresh air come in from air inlet pipe 2 in divergent segment 121, and mixing is latter
Rise and enter in engine 3.Due to forming ring-type passage gaps 111 and divergent segment 121, the circulating face of divergent segment 121 in flue gas leading 1
Product is far longer than the circulation areas of ring-type passage gaps 111, therefore, between ring-type passage gaps 111 and divergent segment 121 exist compared with
Big pressure drop, i.e. waste gas form larger pressure between the air inlet side (pressure before whirlpool) and outlet of flue gas leading 1 survey (admission pressure)
Difference, the pressure difference are the driving pressure difference of egr system, and the driving pressure difference of egr system is substantially increased by the mixed admission structure,
Simultaneously, it is not necessary to increase oil consumption, will not also increase the pumping loss of engine.
Further, in the present embodiment, the pipeline section to be crossed with air inlet pipe 2 of flue gas leading 1 is normal bend section, vertical curved
Pipeline section includes the first bend loss 11 and the second bend loss 12 being mutually connected vertically, and divergent segment is provided with the second bend loss 12
121, ring-type passage gaps 111, the first bend loss 11 and air inlet pipe 2 are formed between the second bend loss 121 and the mouth of pipe of air inlet pipe 2
Vertically.The processing and manufacturing for facilitating flue gas leading 1 is so set.Certainly, the pipeline section to be crossed with air inlet pipe 2 of flue gas leading 1 can also be
The bend loss of other angles.
As shown in Fig. 2 based on the mixed admission structure described by any of the above embodiment, the embodiment of the present invention additionally provides
A kind of egr system, including engine 3, booster 6, air inlet pipe 2, escape pipe 7, flue gas leading 1, charge air cooler 4 and EGR valve 5, wherein,
Two turbines 61 of booster 6 are respectively arranged in air inlet pipe 2 and escape pipe 7, and one end of flue gas leading 1 is connected to escape pipe 7
Be located at turbine 61 before position, the other end of flue gas leading 1 connects with the air inlet pipe 2 of engine 3, and flue gas leading 1 and air inlet
Pipe 2 is connected using the mixed admission structure as described by any of the above embodiment, the outlet of flue gas leading 1 with the air inlet of engine 3
Connect.
During work, waste gas takes gas before the turbine 61 of escape pipe 7, and waste gas enters flue gas leading 1, successively through charge air cooler 4,
EGR valve 5 reaches flue gas leading 1 and the intersection of air inlet pipe 2, and waste gas enters the divergent segment of flue gas leading 1 through ring-type passage gaps 111
121, at the same time, fresh air enters the divergent segment 121 of flue gas leading 1 by air inlet pipe 2, and fresh air is with waste gas in divergent segment
121 mixing, enter engine 3 together afterwards.The mixed admission structure in the application is employed due to egr system, therefore, not
Need to increase engine consumption and in the case of not increasing engine pumping loss, improve before whirlpool between pressure and admission pressure
Difference, that is, add driving pressure difference.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (3)
1. the mixed admission structure of a kind of egr system, it is characterised in that including for being passed through the air inlet pipe of fresh air and being used for
The flue gas leading of waste gas is taken before turbine, the mouth of pipe of the air inlet pipe is placed in the flue gas leading, and the air inlet pipe is given up with described
Ring-type passage gaps are formed between tracheae, and the rear portion of the mouth of pipe positioned at the air inlet pipe of the flue gas leading is provided with flaring
Section.
2. mixed admission structure according to claim 1, it is characterised in that the flue gas leading crosses with the air inlet pipe
Pipeline section be normal bend section, the normal bend section includes orthogonal first bend loss and the second bend loss, described
The divergent segment is provided with two bend loss, first bend loss is vertical with the air inlet pipe.
3. a kind of egr system, including engine, booster, air inlet pipe, escape pipe and flue gas leading, two whirlpools of the booster
Turbine is respectively arranged in the air inlet pipe and the escape pipe, and one end of the flue gas leading is connected to being located at for the escape pipe
Position before the turbine, the other end of the flue gas leading connect with the air inlet pipe of the engine, it is characterised in that described
Flue gas leading and the air inlet pipe use mixed admission structure as claimed in claim 1 or 2, the outlet of the flue gas leading with it is described
The air inlet connection of engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711041273.0A CN107559106A (en) | 2017-10-30 | 2017-10-30 | A kind of egr system and its mixed admission structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711041273.0A CN107559106A (en) | 2017-10-30 | 2017-10-30 | A kind of egr system and its mixed admission structure |
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| Publication Number | Publication Date |
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| CN107559106A true CN107559106A (en) | 2018-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711041273.0A Pending CN107559106A (en) | 2017-10-30 | 2017-10-30 | A kind of egr system and its mixed admission structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101809274A (en) * | 2007-09-24 | 2010-08-18 | 克诺尔商用车制动系统有限公司 | Be used to improve the method and apparatus of the exhaust gas recirculation of internal-combustion engine |
| CN103306858A (en) * | 2013-05-31 | 2013-09-18 | 潍柴动力股份有限公司 | EGR (exhaust gas recirculation) air mixing device and fuel engine with EGR system |
| CN105508086A (en) * | 2015-12-29 | 2016-04-20 | 江苏大学 | Exhaust gas recirculation constant-pressure device for satisfying self-adaptive control of high-supercharge-ratio engine and control method |
| CN106640430A (en) * | 2016-12-20 | 2017-05-10 | 南京世界村汽车动力有限公司 | Six-cylinder internal combustion engine exhaust gas recirculation system |
-
2017
- 2017-10-30 CN CN201711041273.0A patent/CN107559106A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101809274A (en) * | 2007-09-24 | 2010-08-18 | 克诺尔商用车制动系统有限公司 | Be used to improve the method and apparatus of the exhaust gas recirculation of internal-combustion engine |
| CN103306858A (en) * | 2013-05-31 | 2013-09-18 | 潍柴动力股份有限公司 | EGR (exhaust gas recirculation) air mixing device and fuel engine with EGR system |
| CN105508086A (en) * | 2015-12-29 | 2016-04-20 | 江苏大学 | Exhaust gas recirculation constant-pressure device for satisfying self-adaptive control of high-supercharge-ratio engine and control method |
| CN106640430A (en) * | 2016-12-20 | 2017-05-10 | 南京世界村汽车动力有限公司 | Six-cylinder internal combustion engine exhaust gas recirculation system |
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Application publication date: 20180109 |