CN107489565A - A kind of gas recirculation system and the engine with the system - Google Patents
A kind of gas recirculation system and the engine with the system Download PDFInfo
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- CN107489565A CN107489565A CN201611208682.0A CN201611208682A CN107489565A CN 107489565 A CN107489565 A CN 107489565A CN 201611208682 A CN201611208682 A CN 201611208682A CN 107489565 A CN107489565 A CN 107489565A
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- cooler
- waste gas
- recirculation system
- valve
- engine
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Abstract
The invention discloses a kind of gas recirculation system, including cooler, the cooling duct of cooler, which is provided with, to be used to connect the exhaust gas entrance of exhaust manifold and booster after-treatment device, the first waste gas outlet for connecting inlet manifold and the second waste gas outlet for connecting booster, what the second waste gas outlet was located at the first waste gas outlet flows to downstream, and is provided with bend flow channel switch valve between.Amount of parts of the present invention is less, occupy little space, assemble it is simple, save space in engine, one cooler of arrangement is more prone on engine, and cost is low；In addition, making the second waste gas outlet of connection booster longer compared to flow distance for the first waste gas outlet, bigger heat radiation power can be realized, extends flowing of the waste gas in cooler to increase heat radiation power.The invention also discloses a kind of engine for including above-mentioned gas recirculation system.
Description
Technical field
The present invention relates to engine design field, more specifically to a kind of gas recirculation system.In addition,
The invention further relates to a kind of engine for including above-mentioned gas recirculation system.
Background technology
As Abgasgesetz and oil consumption require increasingly strict, Abgasgesetz, which turns into, leads the leading of diesel technology progress
Factor.Harmful substance in control motor exhaust becomes more and more important.EGR (Exhaust Gas are used within the engine
Recirculation, gas recirculation system) technology, ignition temperature can be effectively controlled, reduces the discharge of nitrogen oxides.
Two coolers of generally use are respectively in high pressure exhaust gas recycling and low pressure exhaust gas recycling in the prior art
Waste gas is cooled down, and in the different phase used of engine, waste gas imports from the side of cooler for recycled exhaust gas, and from opposite side
Export, cooling medium and waste gas reverse flow, the structure of cooling is single, and function is single, further, since the parts of engine
It is more, set two coolers also to increase the degree of difficulty of engine arrangement.
In summary, how the gas recirculation system that a kind of arrangement is simple, cost is low is provided, is current art technology
Personnel's urgent problem to be solved.
The content of the invention
In view of this, it is an object of the invention to provide a kind of gas recirculation system, the structure of the gas recirculation system
Simply, arrangement is convenient, and cost is relatively low.
It is a further object of the present invention to provide a kind of engine for including above-mentioned gas recirculation system.
To achieve these goals, the present invention provides following technical scheme：
A kind of gas recirculation system, including cooler, the cooling duct of the cooler, which is provided with, to be used to connect exhaust
The exhaust gas entrance of manifold and booster after-treatment device, the first waste gas outlet for connecting inlet manifold and for connect increase
Second waste gas outlet of depressor, second waste gas outlet are located at the downstream that flows to of first waste gas outlet, and at the two it
Between be provided with bend flow channel switch valve.
Preferably, the cooler is provided with first with the inlet manifold or with the connecting line of the exhaust manifold
Choke valve；The cooler is provided with the second section with the booster or with the connecting line of the booster after-treatment device
Flow valve.
Preferably, the bend flow channel switch valve, the first throttle valve and the second throttle connect with control device
Connect, the control device is also connected with engine speed measuring device, for bend flow channel described in the rotational speed regulation according to the engine
The opening and closing of switch valve, the first throttle valve and the second throttle.
Preferably, in addition to the cooler exhaust gas bypass path being arranged in parallel, set on the exhaust gas bypass path
There is by-passing valve.
Preferably, when the rotating speed of the engine is low speed, the control device controls the first throttle valve, bypass
Valve is opened, and the second throttle, bend flow channel switch valve are closed；
And/or when the rotating speed of the engine is middling speed, the control device controls the first throttle valve to open, institute
State bend flow channel switch valve and connect the exhaust gas entrance and first waste gas outlet, the second throttle and the by-passing valve close
Close；
And/or when the rotating speed of the engine is high speed, the control device controls the second throttle to open, institute
State bend flow channel switch valve and connect the exhaust gas entrance and second waste gas outlet, the first throttle valve and the by-passing valve close
Close.
Preferably, the cooling duct of the cooler is bending type passage, the exhaust gas entrance and the second waste gas outlet point
Not She Yu the cooling duct both ends, the bend flow channel switch valve be located at the cooling duct kink.
Preferably, the cooling duct of the cooler is U.
Preferably, it is connected for carrying out the coolant channels of heat exchange with the exhaust passageway in the cooler with cylinder.
Preferably, the bend flow channel switch valve is the poppet or connect that motor-driven butterfly valve or vacuum governor control
The rotary valve of bar transmission.
A kind of engine, including gas recirculation system, the gas recirculation system are described in above-mentioned any one
Gas recirculation system.
In gas recirculation system provided by the invention, cooler is by setting two waste gas outlets, and in two waste gas
Increase bend flow channel switch valve between outlet, high pressure exhaust gas recycling and low pressure exhaust gas recycling is shared a cooler,
Amount of parts is less, occupy little space, assemble it is simple, save space in engine, one cooling of arrangement on engine
Device is more prone to, and cost is low；In addition, make the second waste gas outlet of connection booster compared to being flowed for the first waste gas outlet
Apart from longer, bigger heat radiation power can be realized, extends flowing of the waste gas in cooler to increase heat radiation power.
Present invention also offers a kind of engine for including above-mentioned gas recirculation system.
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 gas recirculation system provided by the present invention；
Fig. 2 is the schematic diagram of cooler in a kind of gas recirculation system provided by the present invention.
In Fig. 1-2：
1 it is cooler, 11 be the first waste gas outlet, 12 be the second waste gas outlet, 13 be exhaust gas entrance, 14 is that bend flow channel is opened
Close valve, 2 be exhaust gas bypass path, 21 be by-passing valve, 31 be first throttle valve, 32 be second throttle.
Embodiment
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.
The core of the present invention is to provide a kind of gas recirculation system, and the structure of the gas recirculation system is simple, arrangement
It is convenient, and cost is relatively low.
Another core of the present invention is to provide a kind of engine for including above-mentioned gas recirculation system.
Fig. 1 and Fig. 2 are refer to, Fig. 1 is a kind of structural representation of gas recirculation system provided by the present invention；Fig. 2
For the schematic diagram of cooler in a kind of gas recirculation system provided by the present invention.
A kind of gas recirculation system provided by the present invention, including cooler 1, cooler 1 be provided with cooling duct with
And the coolant path for being exchanged heat with cooling duct or refrigerant element.Cooling duct is used to be connected with cylinder body, to obtain waste gas simultaneously
Waste gas is cooled down.Cooling duct is provided with exhaust gas entrance 13, the first waste gas outlet 11 and the second waste gas outlet 12.Waste gas enters
Mouth 13 is used to connect exhaust manifold and booster after-treatment device, and the first waste gas outlet 11 is used to connect inlet manifold, and second is useless
Gas outlet 12 is used to connect booster or connects the charge air cooler of booster.In the waste gas flow direction of cooling duct, the second waste gas goes out
Mouth 12 flows to downstream positioned at the first waste gas outlet 11, and is provided with bend flow channel switch valve 14 between.Bend flow channel switchs
The effect of valve 14 is that control waste gas flows out cooler by the first waste gas outlet 11, and flows out cooler by the second waste gas outlet 12.
That is, after waste gas is entered by exhaust gas entrance 13, the position of the first waste gas outlet 11 can be first flow to, due to bend flow channel switch valve
14 effect, form the traffic organising to waste gas.
It should be noted that above-mentioned inlet manifold, exhaust manifold are the inlet manifold and exhaust manifold of engine cylinder-body,
Booster is connected on exhaust manifold.Said system when in use, in the first use state, waste gas since exhaust manifold,
Air inlet pipeline through subcooler, cooler, the outlet pipe of cooler and inlet manifold successively, then inlet casing；Second
In use state, waste gas passes through exhaust manifold, booster after-treatment device, successively the air inlet pipeline through subcooler, cooler
With the outlet pipe, booster, charge air cooler of cooler, and inlet manifold is returned to, finally enter cylinder.
In gas recirculation system provided by the present invention, cooler 1 gives up by setting two waste gas outlets, and at two
Gas increases bend flow channel switch valve 14 between outlet, high pressure exhaust gas recycling and low pressure exhaust gas recycling is shared a cooling
Device, amount of parts is less, occupy little space, assemble it is simple, save space in engine, arrangement one is cold on engine
But device is more prone to, and cost is low；In addition, make the second waste gas outlet 12 of connection booster compared to the first waste gas outlet 11 and
Say that flow distance is longer, bigger heat radiation power can be realized, extend flowing of the waste gas in cooler for recycled exhaust gas to increase radiating
Power.
Optionally, on the basis of above-described embodiment, above-mentioned bend flow channel switch valve 14 is except that can select connection first
The waste gas outlet 12 of waste gas outlet 11 or second, the first waste gas outlet 11 of connection or leading to for the second waste gas outlet 12 can also be controlled
Road apart from flow, such as volume control device can be set up on bend flow channel switch valve 14, by the flow in control passage,
Realize to change of the device to the cooling effect of waste gas.
On the basis of above-described embodiment, cooler 1 is provided with inlet manifold or with the connecting line of exhaust manifold
First throttle valve 31；Cooler 1 and booster are provided with second throttle with the connecting line of booster after-treatment device
32。
It should be noted that the first waste gas outlet 11 of cooler 1 and connecting line the going out for cooler of inlet manifold
Air pipe, the exhaust gas entrance 13 of cooler 1 and the connecting line of exhaust manifold are the air inlet pipeline of cooler, in outlet pipe and
First throttle valve 31 can be set on air inlet pipeline, the gas flow on outlet pipe, air inlet pipeline is carried out to realize
Control.
Corresponding, the pipeline that the first waste gas outlet 11 of cooler 1 is connected with booster after-treatment device is air inlet pipe
Road, the pipeline that the second waste gas outlet 12 of cooler 1 is connected with booster is outlet pipe, on outlet pipe and air inlet pipeline
Second throttle 32 can be set, the gas flow on outlet pipe, air inlet pipeline is controlled to realize.
Optionally, above-mentioned set-up mode is not unique, as long as the control of flow in loop can be realized.
On the basis of above-described embodiment, bend flow channel switch valve 14, first throttle valve 31 and second throttle 32 with
Control device is connected, and control device is also connected with engine speed measuring device, and unsteady flow is correspondingly adjusted for the rotating speed according to engine
The 32 respective opening and closing of road switch valve 14, first throttle valve 31 and second throttle.
Can be smooth with the control of lifting system it should be noted that being automatically controlled by control device to above-mentioned valve body
Property.
On the basis of any one above-mentioned embodiment, in addition to the exhaust gas bypass path being arranged in parallel with cooler 1
2, exhaust gas bypass path 2 is provided with by-passing valve 21.
Fig. 1 is refer to, exhaust gas bypass path 2 is connected in parallel with cooler in Fig. 1, and by-passing valve 21 is arranged on exhaust gas bypass
On path 2.In vehicle idling state, waste gas from exhaust manifold, successively through subcooler air inlet pipeline, exhaust gas bypass path 2,
By-passing valve, outlet pipe and inlet manifold, subsequently into cylinder.In above process, exhaust gas bypass path 2 is short by cooler
Road so that waste gas only enters exhaust gas bypass path 2, is eventually returned to inlet manifold.
On the basis of any one above-mentioned embodiment, during actual use, control device is according to engine speed to cold
But device is controlled.
When the rotating speed of engine is low speed, control device control first throttle valve 31, by-passing valve 21 are opened, the second throttling
Valve 32, bend flow channel switch valve 14 are closed.Wherein, low speed can be specially 750-1000r/min.
And/or when the rotating speed of engine is middling speed, control device control first throttle valve 31 is opened, bend flow channel switch valve
The 14 connection waste gas outlets 11 of exhaust gas entrance 13 and first, second throttle 32 and by-passing valve 21 are closed.Wherein, middling speed can be specific
For 1000-2000r/min.
And/or when the rotating speed of engine is high speed, control device control second throttle 32 is opened, bend flow channel switch valve
The 14 connection waste gas outlets 12 of exhaust gas entrance 13 and second, first throttle valve 31 and by-passing valve 21 are closed.Wherein, at a high speed can be specific
For 2000-3000r/min.
On the basis of any one above-mentioned embodiment, the cooling duct of cooler 1 is bending type passage, exhaust gas entrance
13 and second waste gas outlet 12 be respectively arranged on the both ends of cooling duct, bend flow channel switch valve 14 is located at the kink of cooling duct.
In order to increase the action effect for the waste gas that the second exhaust gas entrance 12 is passed through, will can be connected with the second waste gas outlet 12
Cooling channel on waste gas be sufficiently cooled and handle.The cooling duct of above-mentioned bending can increase the length of cooling channel
Degree, makes cooling channel fully be reacted with refrigerant.
On the basis of above-described embodiment, the cooling duct of cooler 1 is U.Specific set may be referred to Fig. 2
U.
Optionally, above-mentioned bending type passage can also be M shapes passage, Z-shaped passage, or lead to for the revolution class of other shapes
Road.
On the basis of any one above-mentioned embodiment, for carrying out heat exchange with the exhaust passageway in cooler 1
Coolant channels are connected with cylinder.
Optionally, bend flow channel switch valve 14 is the poppet or connecting rod that motor-driven butterfly valve or vacuum governor control
The rotary valve of transmission.
Except the gas recirculation system that above-mentioned each embodiment is provided, the present invention, which also provides one kind, includes above-mentioned implementation
The engine of gas recirculation system, the structure of other each several parts of the engine refer to prior art disclosed in example, herein
Repeat no more.
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.
Gas recirculation system provided by the present invention and the engine with the system are described in detail above.
Specific case used herein is set forth to the principle and embodiment of the present invention, and the explanation of above example is simply used
Understand the method and its core concept of the present invention in help.It should be pointed out that for those skilled in the art,
Under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification
Fall into the protection domain of the claims in the present invention.
Claims (10)
1. a kind of gas recirculation system, including cooler (1), it is characterised in that set on the cooling duct of the cooler (1)
Have for connecting the exhaust gas entrance (13) of exhaust manifold and booster after-treatment device, the first waste gas for connecting inlet manifold
(11) and the second waste gas outlet (12) for connecting booster are exported, second waste gas outlet (12) is located at described first
The downstream of waste gas outlet (11) flow direction, and bend flow channel switch valve (14) is provided between.
2. gas recirculation system according to claim 1, it is characterised in that the cooler (1) and the air inlet discrimination
Pipe is provided with first throttle valve (31) with the connecting line of the exhaust manifold；The cooler (1) and the booster,
Or it is provided with second throttle (32) with the connecting line of the booster after-treatment device.
3. gas recirculation system according to claim 2, it is characterised in that the bend flow channel switch valve (14), described
First throttle valve (31) and the second throttle (32) are connected with control device, and the control device also tests the speed with engine
Device connects, for bend flow channel switch valve (14), the first throttle valve (31) described in the rotational speed regulation according to the engine
With the opening and closing of the second throttle (32).
4. gas recirculation system according to claim 3, it is characterised in that also include in parallel with the cooler (1)
The exhaust gas bypass path (2) of setting, the exhaust gas bypass path (2) are provided with by-passing valve (21).
5. gas recirculation system according to claim 4, it is characterised in that when the rotating speed of the engine is low speed
When, the control device controls the first throttle valve (31), by-passing valve (21) to open, the second throttle (32), unsteady flow
Road switch valve (14) is closed；
And/or when the rotating speed of the engine is middling speed, the control device controls the first throttle valve 31 to open, described
Bend flow channel switch valve 14 connects the exhaust gas entrance 13 and first waste gas outlet 11, the second throttle 32 and the side
Port valve 21 is closed；
And/or when the rotating speed of the engine is high speed, the control device controls the second throttle (32) to open, institute
State bend flow channel switch valve (14) and connect the exhaust gas entrance (13) and second waste gas outlet (12), the first throttle valve
(31) closed with the by-passing valve (21).
6. according to the gas recirculation system described in claim 1 to 5 any one, it is characterised in that the cooler (1)
Cooling duct is bending type passage, and the exhaust gas entrance (13) and the second waste gas outlet (12) are respectively arranged on the cooling duct
Both ends, the bend flow channel switch valve (14) are located at the kink of the cooling duct.
7. gas recirculation system according to claim 6, it is characterised in that the cooling duct of the cooler (1) is U
Shape passage.
8. gas recirculation system according to claim 7, it is characterised in that for it is useless in the cooler (1)
The coolant channels that gas path carries out heat exchange are connected with cylinder.
9. gas recirculation system according to claim 6, it is characterised in that the bend flow channel switch valve (14) is motor
The poppet of butterfly valve or vacuum governor control or the rotary valve of link transmission of driving.
10. a kind of engine, including gas recirculation system, it is characterised in that the gas recirculation system is claim 1
To the gas recirculation system described in 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611208682.0A CN107489565B (en) | 2016-12-23 | 2016-12-23 | Exhaust gas recirculation system and engine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611208682.0A CN107489565B (en) | 2016-12-23 | 2016-12-23 | Exhaust gas recirculation system and engine with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107489565A true CN107489565A (en) | 2017-12-19 |
| CN107489565B CN107489565B (en) | 2020-06-16 |
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ID=60643117
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611208682.0A Active CN107489565B (en) | 2016-12-23 | 2016-12-23 | Exhaust gas recirculation system and engine with same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120155A (en) * | 2019-12-03 | 2020-05-08 | 一汽解放汽车有限公司 | EGR cooling device and engine |
| CN112392630A (en) * | 2020-11-18 | 2021-02-23 | 中国煤炭科工集团太原研究院有限公司 | Novel intelligent controllable waste gas circulation device for mine and control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007315231A (en) * | 2006-05-24 | 2007-12-06 | Toyota Motor Corp | Exhaust emission control system of internal combustion engine |
| CN101718237A (en) * | 2008-10-09 | 2010-06-02 | 通用汽车环球科技运作公司 | Three-mode cooler for exhaust gas recirculation |
-
2016
- 2016-12-23 CN CN201611208682.0A patent/CN107489565B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007315231A (en) * | 2006-05-24 | 2007-12-06 | Toyota Motor Corp | Exhaust emission control system of internal combustion engine |
| CN101718237A (en) * | 2008-10-09 | 2010-06-02 | 通用汽车环球科技运作公司 | Three-mode cooler for exhaust gas recirculation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120155A (en) * | 2019-12-03 | 2020-05-08 | 一汽解放汽车有限公司 | EGR cooling device and engine |
| CN112392630A (en) * | 2020-11-18 | 2021-02-23 | 中国煤炭科工集团太原研究院有限公司 | Novel intelligent controllable waste gas circulation device for mine and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107489565B (en) | 2020-06-16 |
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Effective date of registration: 20181218 Address after: 102206, Beijing, Shahe Town, Changping District Road, sand Yang Applicant after: Beiqi Futian Automobile Co., Ltd. Address before: 100102 No.1 Courtyard Building, Futong East Street, Chaoyang District, Beijing Applicant before: Auto (China) Co., Ltd. |
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