CN209212409U - Gas engine air/gas mixing arrangement - Google Patents
Gas engine air/gas mixing arrangement Download PDFInfo
- Publication number
- CN209212409U CN209212409U CN201821936629.7U CN201821936629U CN209212409U CN 209212409 U CN209212409 U CN 209212409U CN 201821936629 U CN201821936629 U CN 201821936629U CN 209212409 U CN209212409 U CN 209212409U
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- China
- Prior art keywords
- cylinder
- gas
- air
- branch pipe
- combustion gas
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- 239000007789 gas Substances 0.000 claims abstract description 37
- 239000000567 combustion gas Substances 0.000 claims abstract description 33
- 238000002347 injection Methods 0.000 claims abstract description 32
- 239000007924 injection Substances 0.000 claims abstract description 32
- 239000002737 fuel gas Substances 0.000 claims abstract description 15
- 239000007921 spray Substances 0.000 claims abstract description 5
- 238000005452 bending Methods 0.000 claims abstract description 4
- 230000008676 import Effects 0.000 claims abstract description 4
- 238000010943 off-gassing Methods 0.000 claims abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 239000008246 gaseous mixture Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The utility model discloses a kind of gas engine air/gas mixing arrangements, comprising: inlet manifold connect with cylinder head and forms air intake duct before inlet valve；Combustion gas branch pipe one end is connect with fuel gas injection valve, and the other end protrudes into inlet manifold；Combustion gas branch pipe is in the air intake duct inner bending, its open end is set in the air intake duct near inlet valve, air inlet directive cylinder of the outgassing direction of combustion gas branch pipe from cylinder, and along the arranged tangential of cylinder inner wall, the high-pressure gas that fuel gas injection valve sprays imports cylinder through combustion gas branch pipe and forms rotation mixed airflow.Cylinder in the utility model is the eddy flow part on essential meaning, injection energy in high-pressure gas course of injection can be such that combustion gas rotates, it drives air and gaseous mixture to rotate and keeps entering cylinder, improve the uniformity of air/gas mixing, rotation mixed airflow into cylinder can be such that upper, middle and lower layer gas mixes rapidly, to obtain better combustion efficiency in combustion stroke.
Description
Technical field
The utility model relates to engine gas mixing arrangement technical fields, more particularly to one kind to make on gas engine
The device that combustion gas and air are mixed.
Background technique
There are two types of the common fuel gas supply modes of gas engine: one is the single-point premixs that combustion gas is supplied before inlet manifold
Mode, another kind are the interior multi-point injection modes sprayed of air flue before valve.For multi-point injection mode, the every cylinder gas of engine
An injection valve is configured in front of the door, is started to spray after inlet valve opening and scavenging, is stopped injection before IC Intake Valve Closes, with list
Point premix mode is compared, and the performance indexes of engine is greatly improved.With advanced multi-point injection mode, replace
The single-point that generation implements premixes mode, it has also become the common recognition of industry.
But multi-point injection mode, since air intake duct distance is shorter before inlet valve, and the fuel gas injection time is short, combustion gas with
The mixing uniformity of air it is difficult to ensure that, the advantage of multi-point injection cannot be not fully exerted, and become and restrict multi-point injection mode
One of factor of popularization.
It as shown in Figure 3 and Figure 4, is the case study on implementation of common multi-point injection, combustion gas is by fuel gas injection valve 102 and combustion
Gas branch pipe 103 is ejected into the air intake duct 105 before inlet valve 101, is mixed with air, and then enters cylinder by inlet valve 101,
The phase relation of combustion gas and valve opening is referring to Fig. 5, wherein T is the open phase of inlet valve, and substantially stationary constant, t is combustion gas
The injecting time of injection valve 102, t < T, t constantly change with the size of engine loading, especially in the small load of engine
When operating condition, t < < T.When fuel gas injection valve 102 is closed, what it is by the entrance cylinder of inlet valve 101 is pure air, in combustion gas
When injection valve 102 is opened, into cylinder be air/gas mixed gas, induction stroke terminates, and upper, middle and lower layer is in cylinder
The state of existing air, gaseous mixture, air, makes combustion efficiency be deteriorated, influences engine performance.
Chinese invention patent CN104454221B discloses a kind of inlet duct of engine, to the geometry of air intake duct
It is improved, and then enhances the air inlet vortex of air and ensure the charging efficiency of air inlet, but it is applied to diesel engine, air inlet rotation
The power in whirlpool is from air itself (rather than combustion gas), although certain effect can be used for reference and be obtained to gas engine, but still
The mixing requirement of gas/air cannot be fully met.
204646460 U of Chinese utility model patent CN discloses a kind of gas mixer for gas engine,
It is additionally arranged rotatable displaceable body in air intake duct, air-fuel ratio can change by rotation displacement main body, and then advantageous
It is operated normally in engine in the gaseous fuel of different calorific values.
At the end of induction stroke, upper, middle and lower layer presents empty the unresolved gas engine of above patent document in cylinder
The state of gas, gaseous mixture, air, the technical issues of making combustion efficiency be deteriorated, influence engine performance.
Utility model content
For the above-mentioned deficiency of the prior art, the utility model provides a kind of gas engine air/gas mixing arrangement,
To solve gas engine at the end of induction stroke, the state of air, gaseous mixture, air is presented in upper, middle and lower layer in cylinder, is made
The technical issues of combustion efficiency is deteriorated, and influences engine performance.
In order to solve the above technical problems, the following technical solution of the utility model:
A kind of gas engine air/gas mixing arrangement, comprising: inlet manifold, the inlet manifold and cylinder head connect
It connects and forms air intake duct before inlet valve；Fuel gas injection valve and combustion gas branch pipe, combustion gas branch pipe one end and the fuel gas injection
Valve connection, the other end protrude into the inlet manifold；The combustion gas branch pipe is in the air intake duct inner bending, open end setting
In air intake duct near the inlet valve, the outgassing direction of the combustion gas branch pipe is from the air inlet directive cylinder of cylinder, and edge
The arranged tangential of the cylinder inner wall, the high-pressure gas that the fuel gas injection valve sprays import the cylinder through the combustion gas branch pipe
And form rotation mixed airflow.
After adopting the above technical scheme, the technical effect of the utility model is:
Cylinder in the utility model is the eddy flow part on essential meaning, by means of eddy flow part, high-pressure gas course of injection
In injection energy combustion gas can be made to rotate, drive air and gaseous mixture rotate and keep into cylinder, improve air/
The uniformity of combustion gas mixing, the rotation mixed airflow into cylinder can be such that upper, middle and lower layer gas mixes rapidly, to rush in burning
Journey obtains better combustion efficiency.
Detailed description of the invention
Fig. 1 is the structure sectional view of the utility model gas engine air/gas mixing arrangement embodiment；
Fig. 2 is the overlooking structure diagram of cylinder portion in Fig. 1；
Fig. 3 is a kind of structural schematic diagram of well-known technique；
Fig. 4 is the cross-sectional view of G-G in Fig. 3；
Fig. 5 is the relational graph of multipoint sequential injection gas injection amount and valve-open phase in well-known technique shown in Fig. 3；
In figure, 100- cylinder head, 101- inlet valve, 102- fuel gas injection valve, 103- combustion gas branch pipe, 103F- combustion gas branch
Pipe, 104- inlet manifold, 105- air intake duct, 110- cylinder, 111- exhaust valve, 200- rotate mixed airflow.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
Embodiment
As Fig. 1 and Fig. 2 jointly shown in, a kind of gas engine air/gas mixing arrangement, inlet manifold 104 and cylinder
The connection of lid 100 simultaneously forms air intake duct 105 before inlet valve 101.
One end of combustion gas branch pipe 103A is connect with fuel gas injection valve 102, and the other end protrudes into inlet manifold 104, combustion gas branch
Pipe 103F is in 105 inner bending of air intake duct, and open end is set in the air intake duct 105 near the inlet valve 101, institute
The outgassing direction of combustion gas branch pipe 103F is stated from the air inlet ecto-entad directive cylinder 110 of cylinder, and along 110 inner wall of cylinder
Arranged tangential, the high-pressure gas that the fuel gas injection valve 102 sprays imports the cylinder 110 through the combustion gas branch pipe 103E
And form rotation mixed airflow.
In the utility model, inlet manifold can justify can be square, and adaptability is good.
In the utility model, cylinder is the eddy flow part on essential meaning, and combustion gas branch pipe is directly to cylinder injection, eddy flow effect
More preferably.
The utility model is not limited to the above embodiment, all design, principle, structure and methods based on the utility model
Made various improvement, fall within the protection scope of the utility model.
Claims (1)
1. a kind of gas engine air/gas mixing arrangement, comprising:
Inlet manifold, the inlet manifold connect with cylinder head and form air intake duct before inlet valve；
Fuel gas injection valve and combustion gas branch pipe, combustion gas branch pipe one end are connect with the fuel gas injection valve, and the other end protrudes into described
In inlet manifold；It is characterized in that,
In the air intake duct inner bending, open end is set in the air intake duct near the inlet valve combustion gas branch pipe,
The outgassing direction of the combustion gas branch pipe is from the air inlet directive cylinder of cylinder, described and along the arranged tangential of the cylinder inner wall
The high-pressure gas that fuel gas injection valve sprays imports the cylinder through the combustion gas branch pipe and forms rotation mixed airflow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821936629.7U CN209212409U (en) | 2018-11-22 | 2018-11-22 | Gas engine air/gas mixing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821936629.7U CN209212409U (en) | 2018-11-22 | 2018-11-22 | Gas engine air/gas mixing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209212409U true CN209212409U (en) | 2019-08-06 |
Family
ID=67460803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821936629.7U Active CN209212409U (en) | 2018-11-22 | 2018-11-22 | Gas engine air/gas mixing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209212409U (en) |
-
2018
- 2018-11-22 CN CN201821936629.7U patent/CN209212409U/en active Active
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