CN209212367U - Discharge manifold, discharge manifold component and diesel engine - Google Patents
Discharge manifold, discharge manifold component and diesel engine Download PDFInfo
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- CN209212367U CN209212367U CN201822223727.2U CN201822223727U CN209212367U CN 209212367 U CN209212367 U CN 209212367U CN 201822223727 U CN201822223727 U CN 201822223727U CN 209212367 U CN209212367 U CN 209212367U
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Abstract
The utility model discloses a kind of discharge manifold, discharge manifold component and diesel engines, the discharge manifold includes: multiple cylinder exhaust ducts, the first gas port for being connected to the first supercharger volute air flue, the second gas port for being connected to the second supercharger volute air flue, the exhaust gas recycling air hatch being connected to the second gas port；Wherein, only the second supercharger volute air flue is provided with exhaust by-pass valve in the first supercharger volute air flue and the second supercharger volute air flue；The number for the cylinder exhaust duct being connected to the second gas port is greater than the number for the cylinder exhaust duct being connected to the first gas port.The extraction flow of air flue, improves the pressure difference between gas handling system and exhaust system, to increase the driving force of gas recirculation system where above-mentioned discharge manifold increases exhaust gas recycling and exhaust by-pass valve；The temperature variation brought by exhaust by-pass valve is opened is also reduced, the service life of exhaust manifold and booster is extended.
Description
Technical field
The utility model relates to diesel engine structure-design technique field, more specifically to a kind of discharge manifold,
Discharge manifold component and diesel engine.
Background technique
With the continuous upgrading of heavy-duty engine emission regulation, in upcoming 6 stage of state, gas recirculation system becomes
The mainstream configuration of the former row of state 6 heavy duty diesel engine control.
As shown in Figure 1, heavy six cylinder diesel engines generally use symmetrical three-stage exhaust manifold structure, specifically: row
Left section 11 of gas manifold, exhaust manifold middle section 12, right section 13 of exhaust manifold.One cylinder exhaust duct and the setting of two cylinder exhaust duct are in exhaust discrimination
Left section 11 of pipe, three cylinder exhaust ducts and the setting of four cylinder exhaust ducts are set in exhaust manifold middle section 12, five cylinder exhaust ducts and six cylinder exhaust ducts
It sets at right section 13 of exhaust manifold；Exhaust manifold middle section 12 is provided with booster 14, and specifically, exhaust manifold middle section 12 has and the
First gas port of one supercharger volute air flue connection and the second gas port being connected to the second supercharger volute air flue；One cylinder
Exhaust duct, two cylinder exhaust duct and three cylinder exhaust ducts are connected to by the first gas port with the first supercharger volute air flue, the first pressurization
The not set exhaust by-pass valve of device volute air flue；Four cylinder exhaust ducts, five cylinder exhaust ducts, six cylinder exhaust ducts and exhaust gas recycle air hatch
15 are connected to by the second gas port with the second supercharger volute air flue, and the second supercharger volute air flue is equipped with exhaust by-pass valve.
Since above-mentioned diesel engine uses above-mentioned symmetrical discharge manifold structure, i.e. the cylinder exhaust duct and first of half number
Gas port connection, the cylinder exhaust duct of the other half number are connected to the second gas port.The exhaust duct summarized from the cylinder cap of half number
It carries out taking gas, the driving force that will lead to gas recirculation system in the insufficient situation of flow is insufficient, in mid-low speed range
Under can not normal use gas recirculation system, and heavy duty diesel engine is main discharge region under mid-low speed range
Domain can not normally introduce sufficient exhaust gas in air inlet and lead to not change high-temperature oxygen-enriched NO_x formation condition, that is, lose
It has gone to reduce the purpose that engine original is arranged.
In addition, since the second supercharger volute air flue is equipped with exhaust by-pass valve, the air flue summarized from the cylinder cap of half number
Volume is smaller, during exhaust by-pass valve is opened, according to equation PV=nRT, and during quantitative gas loss, row
Gas temperature variation can be higher, causes exhaust manifold and booster there are durable risk, so that exhaust manifold and booster make
It is shorter with the service life.
Utility model content
In view of this, the purpose of the utility model is to provide a kind of discharge manifold, to increase the drive of gas recirculation system
Power.The another object of the utility model is to provide a kind of discharge manifold component and a kind of tool with above-mentioned discharge manifold
There is the diesel engine of above-mentioned discharge manifold component.
In order to achieve the above object, the utility model provides the following technical solutions:
A kind of discharge manifold, comprising: multiple cylinder exhaust ducts, the first air flue for being connected to the first supercharger volute air flue
Mouthful, the second gas port for being connected to the second supercharger volute air flue, the exhaust gas recycling being connected to second gas port
Air hatch；Wherein, only second booster in the first supercharger volute air flue and the second supercharger volute air flue
Volute air flue is provided with exhaust by-pass valve, which is characterized in that the number for the cylinder exhaust duct being connected to second gas port
Greater than the number for the cylinder exhaust duct being connected to first gas port.
Preferably, N2-N1=1, wherein N2Number for the cylinder exhaust duct being connected to second gas port, N1For
The number for the cylinder exhaust duct being connected to first gas port.
Preferably, the cylinder exhaust duct is six.
Preferably, the discharge manifold includes: first exhaust menifold section and second exhaust menifold section；
Wherein, all cylinder exhaust ducts are set to the first exhaust menifold section and the second exhaust menifold section,
The exhaust gas recycling air hatch is connected to the second exhaust menifold section.
Preferably, the number for the cylinder exhaust duct being arranged in the first exhaust menifold section and the second exhaust menifold
The number for the cylinder exhaust duct being arranged in section is equal, and is provided with blocking-up structure so that described in the first exhaust menifold section
A part of cylinder exhaust duct in first exhaust menifold section is connected to first gas port and the first exhaust menifold
Cylinder exhaust duct described in another part in section is connected to second gas port.
Preferably, the blocking-up structure is an integral structure with the first exhaust menifold section.
Preferably, the discharge manifold further includes that the exhaust gas recycling being connected to the second exhaust menifold section takes tracheae
Section, the exhaust gas recycling air hatch are set to the exhaust gas recycling and take tracheae section.Based on the discharge manifold of above-mentioned offer, originally
Utility model additionally provides a kind of discharge manifold component, which includes discharge manifold and be set to the exhaust qi
The booster of pipe, wherein the discharge manifold is discharge manifold described in any of the above embodiments.
Discharge manifold component based on above-mentioned offer, the utility model additionally provide a kind of diesel engine, diesel oil hair
Motivation includes discharge manifold component, and the discharge manifold component is above-mentioned discharge manifold component.
Discharge manifold provided by the utility model, by the number for dexterously changing the cylinder exhaust duct being connected to the second gas port
Mesh, so that the number for the cylinder exhaust duct being connected to the second gas port is greater than the number for the cylinder exhaust duct being connected to the first gas port,
It is compared compared with the prior art using symmetrical discharge manifold structure, air flue where increasing effectively exhaust gas recycling and exhaust by-pass valve
Extraction flow improves the pressure difference between gas handling system and exhaust system, to increase the driving force of gas recirculation system.
Meanwhile discharge manifold provided by the utility model, it is compared compared with the prior art using symmetrical discharge manifold structure, is also increased
The volume of air flue, reduces the temperature brought by exhaust by-pass valve is opened where big exhaust gas recycling and exhaust by-pass valve
Variable quantity extends the service life of exhaust manifold and booster.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is the structural schematic diagram for the exhaust manifold that the prior art provides；
Fig. 2 is the structural schematic diagram of exhaust manifold provided by the embodiment of the utility model；
Fig. 3 is the internal structure chart of exhaust manifold provided by the embodiment of the utility model；
Fig. 4 is improvement comparison diagram of the exhaust manifold provided by the embodiment of the utility model to complete machine EGR rate.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figures 2 and 3, discharge manifold provided by the embodiment of the utility model includes: multiple cylinder exhaust ducts, for
First gas port of the first supercharger volute air flue 211 connection, the second gas for being connected to the second supercharger volute air flue 212
Road junction, the exhaust gas recycling air hatch 24 being connected to the second gas port；Wherein, the first supercharger volute air flue 211 and second increases
Only the second supercharger volute air flue 212 is provided with exhaust by-pass valve in depressor volute air flue 212, the cylinder being connected to the second gas port
The number of exhaust duct is greater than the number for the cylinder exhaust duct being connected to the first gas port.
It should be noted that a part of cylinder exhaust duct is connected to the first gas port, i.e., a part of cylinder exhaust duct and first increases
Depressor volute air flue 211 is connected to；Another part cylinder exhaust duct is connected to the second gas port, i.e. another part cylinder exhaust duct and second
Supercharger volute air flue 212 is connected to.
Discharge manifold provided by the embodiment of the utility model is vented by dexterously changing the cylinder being connected to the second gas port
The number in road, so that the number for the cylinder exhaust duct being connected to the second gas port is greater than the cylinder exhaust duct being connected to the first gas port
Number is compared compared with the prior art using symmetrical discharge manifold structure, and exhaust gas recycling and exhaust by-pass valve place are increased effectively
The extraction flow of air flue improves the pressure difference between gas handling system and exhaust system, to increase gas recirculation system
Driving force.
Meanwhile discharge manifold provided by the embodiment of the utility model, symmetrical discharge manifold structure phase is used compared with the prior art
Than the volume of air flue where also increasing exhaust gas recycling and exhaust by-pass valve is reduced since exhaust by-pass valve opens institute's band
The temperature variation come, extends the service life of exhaust manifold and booster 23.
Meanwhile in discharge manifold provided by the embodiment of the utility model, due to the cylinder exhaust duct being connected to the second gas port
Number be greater than the number of cylinder exhaust duct be connected to the first gas port, the first gas port for and the first supercharger volute air flue
211 connections, the second gas port then make the closer exhaust qi of booster 23 for being connected to the second supercharger volute air flue 212
One end of pipe, improves integrated level.
For ease of description, remember: the number for the cylinder exhaust duct being connected to the first gas port is N1, be connected to the second gas port
Cylinder exhaust duct number be N2.For N2And N1Difference, selected according to actual needs.It is preferential to select for the ease of design
Select N2And N1Difference be 1, i.e. N2-N1=1.Certainly, N also may be selected2And N1Difference be other numerical value, it is not limited to this.
Above-mentioned cylinder exhaust duct can be for four, six or greater than six etc..Currently, six cylinder diesel engines are more common,
Preferentially selecting above-mentioned cylinder exhaust duct is six.At this point, preferentially selecting N2And N1Difference be 1.
Discharge manifold provided by the above embodiment can be divided into two pipeline sections or three pipeline sections etc..It is convenient in order to simplify structure
Installation, preferentially selecting above-mentioned discharge manifold includes: first exhaust menifold section 21 and second exhaust menifold section 22；Wherein, all
Cylinder exhaust duct is set to first exhaust menifold section 21 and second exhaust menifold section 22.It is understood that a part of cylinder exhaust duct
It is set to first exhaust menifold section 21, another part cylinder exhaust duct is set to second exhaust menifold section 22.
In above-mentioned discharge manifold, exhaust gas recycling air hatch 24 is connected to second exhaust menifold section 22, at this point, booster 23
It is set to first exhaust menifold section 21.
In actual application, the cylinder exhaust duct that may be selected to be connected to the second gas port is all set in second exhaust menifold
Section 22, the cylinder exhaust duct being connected to the first gas port is all set in first exhaust menifold section 21；Alternatively, being connected to the first gas port
A part of cylinder exhaust duct be set to first exhaust menifold section 21, another part cylinder exhaust duct for being connected to the first gas port, with
And the cylinder exhaust duct being connected to the second gas port is all set in second exhaust menifold section 22.In order to simplify structure, and reduction leakage
Gas risk, preferentially selects the latter.
Further, it is set in the number and second exhaust menifold section 22 of the cylinder exhaust duct being arranged in first exhaust menifold section 21
The number for the cylinder exhaust duct set is equal, and is provided with blocking-up structure 213 in first exhaust menifold section 21 so that first exhaust menifold
Section 21 on a part of cylinder exhaust duct be connected to the first gas port and first exhaust menifold section 21 on another part cylinder be vented
Road is connected to the second gas port.
In above structure, the first gas port and the second gas port are all set in first exhaust menifold section 21, blocking-up structure 213
21 internal cavity of first exhaust menifold section is divided into two disconnected channels, correspondingly, blocking-up structure 213 has also obstructed
One gas port and the second gas port so that a part of cylinder exhaust duct in first exhaust menifold section 21 be connected to the first gas port,
And another part cylinder exhaust duct in first exhaust menifold section 21 is connected to the second gas port.For the tool of blocking-up structure 213
Body structure and shape, are designed according to actual needs, and the utility model embodiment does not limit this.
It is preferential that blocking-up structure 213 is selected to be an integral structure with first exhaust menifold section 21 for the ease of manufacturing.This
Sample also further reduces gas leakage risk.
Gas is taken for the ease of exhaust gas recycling, above-mentioned discharge manifold further includes the exhaust gas being connected to second exhaust menifold section 22
Recycling takes tracheae section 214, and exhaust gas recycling air hatch 24 is set to exhaust gas recycling and takes tracheae section 214.
Certainly, exhaust gas recycling air hatch 24 is set up directly in second exhaust menifold section 22 by selection, it is not limited to
Above-described embodiment.
In order to which discharge manifold provided by the embodiment of the utility model is better described, below by taking six cylinder exhaust ducts as an example,
It is specifically explained.
Six cylinder exhaust ducts are respectively a cylinder exhaust duct 25, two cylinder exhaust duct 26, three cylinder exhaust ducts 27, four cylinder exhaust ducts
28, five cylinder exhaust ducts 29 and six cylinder exhaust ducts 210.Wherein, a cylinder exhaust duct 25, two cylinder exhaust duct 26, three cylinder exhaust ducts 27 are equal
It is arranged in first exhaust menifold section 21, four cylinder exhaust ducts 28, five cylinder exhaust ducts 29, six cylinder exhaust ducts 210 are arranged at second
In discharge manifold section 22；First gas port and the second gas port are arranged in first exhaust menifold section 21, a cylinder exhaust duct 25
It is connected to the first gas port with two cylinder exhaust duct 26, three cylinder exhaust ducts 27, four cylinder exhaust ducts 28, five cylinder exhaust ducts 29 and six cylinders
Exhaust duct 210 is connected to the two the second gas ports, and exhaust gas recycling air hatch 24 is connected to the second gas port；Booster 23
It is arranged in first exhaust menifold section 21, the first supercharger volute air flue 211 of booster 23 is connected to the first air flue mouth, pressurization
Second supercharger volute air flue 212 of device 23 is connected to the second gas port, and the first supercharger volute air flue 211 and the second pressurization
Only the second supercharger volute air flue 212 is provided with exhaust by-pass valve in device volute air flue 212.
In above structure, blocking-up structure 213 has obstructed the first gas port and the second gas port, so that 25 He of a cylinder exhaust duct
Two cylinder exhaust duct 26 is connected to the first gas port and three cylinder exhaust ducts 27, four cylinder exhaust ducts 28, five cylinder exhaust ducts 29, six
Cylinder exhaust duct 210 is connected to the second gas port.
It is understood that the inner cavity of first exhaust menifold section 21 is divided into two channels by blocking-up structure 213, so that two
It is a summarize after air-flow flowed respectively along different channel, avoid two summarize after air-flow interfere with each other.
As shown in figure 4, to meet emissions object, the original plan external characteristics uses about 15% EGR (Exhaust Gas
Recirculation the diesel engine that) rate, diesel engine provided by the embodiment of the utility model and the prior art provide is equal
Using 6 diesel engine of 9L discharge capacity state.And the diesel engine that the prior art provides uses existing discharge manifold, i.e., symmetrical row
Gas manifold configuration, since pressure reduction problem causes the driving force of gas recirculation system insufficient, not only after revolving speed 1600rpm
It can start to drive, and not meet the target of 15%EGR rate；And diesel engine provided by the embodiment of the utility model uses
Exhaust manifold provided by the embodiment of the utility model, complete machine since revolving speed 1200rpm can drive, while it is big in revolving speed
The EGR rate demand that 15% can be met in the range of 1600rpm greatly increases the model that gas recirculation system uses
It encloses, lays the foundation to meet better complete machine original row；It, can the row of reduction simultaneously in the case where identical EGR rate is reached on same boundary
The 23 dual channel temperature difference of gas manifold and booster improves durability and reliability, the temperature difference for the exhaust manifold that the prior art provides
It can be more than 110 DEG C, and the maximum temperature difference of discharge manifold provided by the embodiment of the utility model is lower than 60 DEG C.
It should be noted that EGR rate, refers to the tolerance and gas recirculation system for returning to cylinder in gas recirculation system
Air inflow ratio.
The discharge manifold provided based on the above embodiment, the utility model embodiment additionally provide a kind of discharge manifold group
Part, the discharge manifold component include discharge manifold and the booster 23 for being set to the discharge manifold, wherein the discharge manifold is upper
State discharge manifold described in embodiment.
Since discharge manifold provided by the above embodiment has above-mentioned technique effect, discharge manifold provided by the above embodiment
Component has above-mentioned discharge manifold, then discharge manifold component provided by the above embodiment also has corresponding technical effect, herein
It repeats no more.
The discharge manifold component provided based on the above embodiment, the utility model embodiment additionally provide a kind of diesel engine
Machine, the diesel engine include discharge manifold component, which is discharge manifold component described in above-described embodiment.
Since discharge manifold component provided by the above embodiment has above-mentioned technique effect, diesel oil provided by the above embodiment
Engine has above-mentioned discharge manifold component, then diesel engine provided by the above embodiment also has corresponding technical effect,
Repeats no more herein.
The foregoing description of the disclosed embodiments makes those skilled in the art can be realized or use the utility model.
Various modifications to these embodiments will be apparent for a person skilled in the art, general original as defined herein
Reason can be realized in other embodiments without departing from the spirit or scope of the present utility model.Therefore, this is practical new
Type is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase
Consistent widest scope.
Claims (9)
1. a kind of discharge manifold, comprising: multiple cylinder exhaust ducts, first for being connected to the first supercharger volute air flue (211)
Gas port, the second gas port for being connected to the second supercharger volute air flue (212), what is be connected to second gas port is useless
Gas recycles air hatch (24)；Wherein, the first supercharger volute air flue (211) and the second supercharger volute air flue
(212) only the second supercharger volute air flue (212) is provided with exhaust by-pass valve in, which is characterized in that with second gas
The number of the cylinder exhaust duct of road junction connection is greater than the number for the cylinder exhaust duct being connected to first gas port.
2. discharge manifold according to claim 1, which is characterized in that N2-N1=1, wherein N2For with second air flue
The number of the cylinder exhaust duct of mouth connection, N1Number for the cylinder exhaust duct being connected to first gas port.
3. discharge manifold according to claim 1, which is characterized in that the cylinder exhaust duct is six.
4. discharge manifold according to claim 1 characterized by comprising first exhaust menifold section (21) and second row
Gas menifold section (22)；
Wherein, all cylinder exhaust ducts are set to the first exhaust menifold section (21) and the second exhaust menifold section
(22), exhaust gas recycling air hatch (24) is connected to the second exhaust menifold section (22).
5. discharge manifold according to claim 4, which is characterized in that the institute being arranged on the first exhaust menifold section (21)
The number for stating the cylinder exhaust duct being arranged in the number and the second exhaust menifold section (22) of cylinder exhaust duct is equal and described
Blocking-up structure (213) is provided in first exhaust menifold section (21) so that a part of institute on the first exhaust menifold section (21)
State cylinder exhaust duct be connected to first gas port and the first exhaust menifold section (21) on another part described in cylinder row
Air flue is connected to second gas port.
6. discharge manifold according to claim 5, which is characterized in that the blocking-up structure (213) and the first exhaust
Menifold section (21) is an integral structure.
7. discharge manifold according to claim 4, which is characterized in that further include connecting with the second exhaust menifold section (22)
Logical exhaust gas recycling takes tracheae section (214), and exhaust gas recycling air hatch (24) is set to the exhaust gas recycling and takes gas
Pipeline section (214).
8. a kind of discharge manifold component, including discharge manifold and the booster (23) for being set to the discharge manifold, feature exists
In the discharge manifold is such as discharge manifold of any of claims 1-7.
9. a kind of diesel engine, including discharge manifold component, which is characterized in that the discharge manifold component is such as claim
Discharge manifold component described in 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822223727.2U CN209212367U (en) | 2018-12-27 | 2018-12-27 | Discharge manifold, discharge manifold component and diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822223727.2U CN209212367U (en) | 2018-12-27 | 2018-12-27 | Discharge manifold, discharge manifold component and diesel engine |
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| Publication Number | Publication Date |
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| CN209212367U true CN209212367U (en) | 2019-08-06 |
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| CN201822223727.2U Active CN209212367U (en) | 2018-12-27 | 2018-12-27 | Discharge manifold, discharge manifold component and diesel engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114687846A (en) * | 2022-03-30 | 2022-07-01 | 江铃汽车股份有限公司 | Exhaust system and car |
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2018
- 2018-12-27 CN CN201822223727.2U patent/CN209212367U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114687846A (en) * | 2022-03-30 | 2022-07-01 | 江铃汽车股份有限公司 | Exhaust system and car |
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