CN116877302A - Air/gas mixing device for gas engine - Google Patents
Air/gas mixing device for gas engine Download PDFInfo
- Publication number
- CN116877302A CN116877302A CN202310973798.7A CN202310973798A CN116877302A CN 116877302 A CN116877302 A CN 116877302A CN 202310973798 A CN202310973798 A CN 202310973798A CN 116877302 A CN116877302 A CN 116877302A
- Authority
- CN
- China
- Prior art keywords
- gas
- air
- air inlet
- branch pipe
- swirl element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002347 injection Methods 0.000 claims abstract description 36
- 239000007924 injection Substances 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 abstract description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 93
- 239000002737 fuel gas Substances 0.000 description 11
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/04—Gas-air mixing apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/04—Gas-air mixing apparatus
- F02M21/045—Vortex mixer
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model discloses a gas engine air/gas mixing device, comprising: the air inlet manifold is connected with the cylinder cover and forms an air inlet channel in front of the air inlet valve; the gas injection valve and the gas branch pipe are arranged in the air inlet manifold, one end of the gas branch pipe is connected with the gas injection valve, and the other end of the gas branch pipe extends into the air inlet manifold; the gas injection device is characterized in that a swirl element is arranged in the gas inlet channel and connected with the gas branch pipe, and high-pressure gas sprayed by the gas injection valve is led into the swirl element through the gas branch pipe to form rotary mixed gas flow. The swirl element is arranged in the air inlet channel, and by means of the swirl element, the injection energy in the high-pressure gas injection process can enable the gas to rotate, so that the air and the mixed gas are driven to rotate and keep entering the air cylinder, the uniformity of air/gas mixing is improved, and the rotating mixed gas entering the air cylinder can enable the upper, middle and lower layers of gas to be rapidly mixed, so that a better combustion effect is obtained in a combustion stroke.
Description
The utility model is a divisional application of the following patent applications: the utility model provides a gas engine air/gas mixing device, which has the application number of CN201811399774.0 and the application date of 2018, 11 and 22.
Technical Field
The utility model relates to the technical field of engine gas mixing devices, in particular to a device for mixing fuel gas and air, which is used on a gas engine.
Background
There are two common gas supply modes for gas engines: one is a single-point premixing mode of supplying fuel gas in front of an intake manifold, and the other is a multi-point injection mode of injecting in a front air passage of a valve. In the multipoint injection mode, an injection valve is arranged in front of each cylinder valve of the engine, injection is started after an intake valve is opened and scavenging is finished, injection is stopped before the intake valve is closed, and compared with the single-point premixing mode, various performance indexes of the engine are greatly improved. The advanced multi-point injection mode is used for replacing the implemented single-point premixing mode, and is becoming the common knowledge of the industry.
However, in the multipoint injection mode, since the distance of the inlet channel in front of the inlet valve is short, the gas injection time is short, the uniformity of mixing the gas and the air is difficult to ensure, the advantages of the multipoint injection cannot be fully exerted, and the multipoint injection mode becomes one of factors restricting the popularization of the multipoint injection mode.
As shown in fig. 9 and 10, in the conventional multi-point injection implementation case, the fuel gas is injected into the air inlet channel 105 in front of the air inlet valve 101 through the fuel gas injection valve 102 and the fuel gas branch pipe 103, mixed with air, and then enters the cylinder through the air inlet valve 101, and the phase relation between the fuel gas and the opening of the air valve is shown in fig. 11, wherein T is the opening phase of the air inlet valve and is basically constant, T is the injection time of the fuel gas injection valve 102, T < T, and T varies continuously with the load of the engine, and especially in the small load working condition of the engine, T < < T. When the gas injection valve 102 is closed, pure air enters the cylinder through the inlet valve 101, when the gas injection valve 102 is opened, mixed gas of air/gas enters the cylinder, the air, the mixed gas and the air are in the upper, middle and lower layers in the cylinder after the air intake stroke is finished, so that the combustion effect is deteriorated, and the performance of the engine is influenced.
Chinese patent No. 104454221B discloses an air intake device for an engine, which improves the geometry of an air intake duct, thereby enhancing the air intake vortex of air and ensuring the filling efficiency of the air intake, but is applied to a diesel engine, the power of the air intake vortex comes from the air itself (rather than the fuel gas), and although the fuel gas engine can refer to and obtain a certain effect, the fuel gas engine still cannot fully meet the mixing requirement of fuel gas/air.
Chinese patent No. CN 204646460U discloses a gas mixer for a gas engine, in which a rotatable displacement body is added in the air inlet channel, and the air-fuel ratio can be changed by rotating the displacement body, so that the normal operation of the gas fuels with different heat values in the engine is facilitated.
None of the above patent documents solves the technical problem that the upper, middle and lower layers in the cylinder are in the state of air, mixed gas and air when the air intake stroke of the gas engine is finished, so that the combustion effect is deteriorated and the performance of the engine is affected.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides an air/gas mixing device of a gas engine, which aims to solve the technical problems that the upper, middle and lower layers in a cylinder are in the states of air, mixed gas and air when the gas engine is at the end of an air inlet stroke, so that the combustion effect is poor and the performance of the engine is influenced.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a gas engine air/gas mixing device comprising:
the air inlet manifold is connected with the cylinder cover and forms an air inlet channel in front of the air inlet valve;
the gas injection valve and the gas branch pipe are arranged in the air inlet manifold, one end of the gas branch pipe is connected with the gas injection valve, and the other end of the gas branch pipe extends into the air inlet manifold; a swirl element is arranged in the air inlet channel and connected with the gas branch pipe, and high-pressure gas sprayed by the gas injection valve is led into the swirl element through the gas branch pipe to form rotary mixed gas flow; the cyclone is a cylindrical cyclone, the cylindrical cyclone and the air inlet manifold are arranged in an air inlet channel of the air inlet manifold in the same direction, tangential air inlets are formed in the pipe wall of the cylindrical cyclone, and the ends of the openings of the gas branch pipes are fixed to the tangential air inlets of the cylindrical cyclone.
After the technical scheme is adopted, the technical effects of the utility model are as follows:
the swirl element is arranged in the air inlet channel, and by means of the swirl element, the injection energy in the high-pressure gas injection process can enable the gas to rotate, so that the air and the mixed gas are driven to rotate and keep entering the air cylinder, the uniformity of air/gas mixing is improved, and the rotating mixed gas entering the air cylinder can enable the upper, middle and lower layers of gas to be rapidly mixed, so that a better combustion effect is obtained in a combustion stroke.
Drawings
FIG. 1 is a cross-sectional view of an embodiment 1 of a gas engine air/gas mixing device of the present utility model;
FIG. 2 is a cross-sectional view of A-A of FIG. 1;
FIG. 3 is a cross-sectional view showing the structure of an embodiment 2 of the air/gas mixing device for a gas engine according to the present utility model;
FIG. 4 is a cross-sectional view of B-B in FIG. 3;
FIG. 5 is a cross-sectional view showing the structure of an embodiment 3 of the air/gas mixing device for a gas engine of the present utility model;
FIG. 6 is a cross-sectional view of C-C of FIG. 5;
FIG. 7 is a cross-sectional view showing the structure of an embodiment 4 of the air/gas mixing device for a gas engine according to the present utility model;
FIG. 8 is a cross-sectional view of D-D of FIG. 7;
FIG. 9 is a schematic diagram of a prior art structure;
FIG. 10 is a cross-sectional view of G-G of FIG. 9;
FIG. 11 is a graph of the relationship between the injection quantity of the multi-point sequential injection gas and the valve opening phase in the prior art shown in FIG. 9;
in the figure, 100-cylinder head, 101-intake valve, 102-gas injection valve, 103-gas branch pipe, 103A-gas branch pipe, 103B-gas branch pipe, 103C-gas branch pipe, 103D-gas branch pipe, 104-intake manifold, 105-intake duct, 106A-swirl element, 106B-swirl element, 106C-swirl element, 106D-swirl element, 107-gas outlet, 108-gas outlet, 109-gas outlet, 200-rotation mixed gas flow.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
Example 1
As shown collectively in fig. 1 and 2, an air/gas mixing device for a gas engine has an intake manifold 104 connected to a cylinder head 100 and forming an intake passage 105 in front of an intake valve 101.
One end of a gas branch pipe 103A is connected with a gas injection valve 102, the other end of the gas branch pipe extends into an intake manifold 104, a swirl element 106A is arranged in an intake passage 105 of the intake manifold 104, the swirl element 106A is connected with the gas branch pipe 103A, and high-pressure gas sprayed by the gas injection valve 102 is guided into the swirl element 106A through the gas branch pipe 103A to form a rotary mixed gas flow 200.
The cyclone 106A is a cylindrical cyclone, the cylindrical cyclone and the intake manifold 104 are arranged in the same direction, the pipe wall of the cylindrical cyclone is provided with a tangential air inlet, and the open end of the gas branch pipe 103A is fixed on the tangential air inlet of the cylindrical cyclone.
Example 2
As shown in fig. 3 and fig. 4 together, a gas engine air/gas mixing device has a structure substantially the same as that of embodiment 1, a swirl element 106B is also a cylindrical swirl element and is also disposed in an air inlet 105 of an air inlet manifold 104, the cylindrical swirl element 106B is disposed in the same direction as the air inlet manifold 104, a radial air inlet is provided on a wall of the cylindrical swirl element 106B, a gas branch pipe 103B extends into the radial air inlet and is fixedly connected with the cylindrical swirl element 106B, an opening at an end of the gas branch pipe 103B is closed, a plurality of air outlet holes (107, 108) are provided on a wall of the gas branch pipe 103B, and gas ejected from the air outlet holes (107, 108) flows tangentially along an inner wall of the cylindrical swirl element 106B.
Example 3
As shown in fig. 5 and 6 together, a gas engine air/gas mixing device has a structure substantially the same as that of embodiment 1, a swirl member 106C is also a cylindrical swirl member and is also provided in an intake passage 105 of an intake manifold 104, the cylindrical swirl member 106C is provided in the same direction as the intake manifold 105, and is different in that a gas branch pipe 103C is bent in the intake passage 105 and extends into the cylindrical swirl member 106C from the axial direction, the axis of the bent portion of the gas branch pipe 103C is deviated from the axis of the cylindrical swirl member 106C, the opening of the end portion of the gas branch pipe 103C is closed, a plurality of gas outlet holes 109 are provided in the wall of the gas branch pipe 103C, and the gas ejected from the gas outlet holes 109 flows tangentially along the inner wall of the cylindrical swirl member 106C.
Example 4
As shown in fig. 7 and 8 together, a gas engine air/gas mixing apparatus has a structure substantially the same as that of embodiment 1, except that a swirl member 106D is an open circular swirl member provided in an intake passage 105 of a cylinder head 100, the circular swirl member 106D is provided coaxially with an intake valve 101, a gas branch pipe 103D is bent in the intake passage 105, a bent portion of the gas branch pipe 103D is arranged in a tangential direction of an opening of the circular swirl member 106D, and an opening end portion of the gas branch pipe 103D is fixed to the opening of the circular swirl member 106D.
In the utility model, the intake manifold is round and square, and has good adaptability.
In the utility model, when the swirl element adopts the open annular swirl element, the inlet valve is coaxially arranged, and the swirl element does not need turning when rotating the mixed airflow 200 when entering the cylinder, so that the air mixing effect is better.
The present utility model is not limited to the above embodiments, and all modifications based on the concept, principle, structure and method of the present utility model are included in the scope of the present utility model.
Claims (1)
1. A gas engine air/gas mixing device comprising:
the air inlet manifold is connected with the cylinder cover and forms an air inlet channel in front of the air inlet valve;
the gas injection valve and the gas branch pipe are arranged in the air inlet manifold, one end of the gas branch pipe is connected with the gas injection valve, and the other end of the gas branch pipe extends into the air inlet manifold; it is characterized in that the method comprises the steps of,
a swirl element is arranged in the air inlet channel and connected with the gas branch pipe, and high-pressure gas sprayed by the gas injection valve is led into the swirl element through the gas branch pipe to form rotary mixed gas flow;
the cyclone is a cylindrical cyclone, the cylindrical cyclone and the air inlet manifold are arranged in an air inlet channel of the air inlet manifold in the same direction, tangential air inlets are formed in the pipe wall of the cylindrical cyclone, and the ends of the openings of the gas branch pipes are fixed to the tangential air inlets of the cylindrical cyclone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310973798.7A CN116877302A (en) | 2018-11-22 | 2018-11-22 | Air/gas mixing device for gas engine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310973798.7A CN116877302A (en) | 2018-11-22 | 2018-11-22 | Air/gas mixing device for gas engine |
| CN201811399774.0A CN109236504B (en) | 2018-11-22 | 2018-11-22 | Air/gas mixing device for gas engine |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811399774.0A Division CN109236504B (en) | 2018-11-22 | 2018-11-22 | Air/gas mixing device for gas engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116877302A true CN116877302A (en) | 2023-10-13 |
Family
ID=65075728
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811399774.0A Active CN109236504B (en) | 2018-11-22 | 2018-11-22 | Air/gas mixing device for gas engine |
| CN202310973798.7A Pending CN116877302A (en) | 2018-11-22 | 2018-11-22 | Air/gas mixing device for gas engine |
| CN202310973788.3A Pending CN117803498A (en) | 2018-11-22 | 2018-11-22 | Air/gas mixing device for gas engine |
| CN202310973679.1A Pending CN116906222A (en) | 2018-11-22 | 2018-11-22 | Air/gas mixing device for gas engine |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811399774.0A Active CN109236504B (en) | 2018-11-22 | 2018-11-22 | Air/gas mixing device for gas engine |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310973788.3A Pending CN117803498A (en) | 2018-11-22 | 2018-11-22 | Air/gas mixing device for gas engine |
| CN202310973679.1A Pending CN116906222A (en) | 2018-11-22 | 2018-11-22 | Air/gas mixing device for gas engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (4) | CN109236504B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1476559A (en) * | 1965-07-29 | 1967-04-14 | Snecma | Injection method and device for propulsion engines, in particular for LNG carriers |
| CN1421601A (en) * | 2001-11-23 | 2003-06-04 | 江苏常发集团 | Air intake guiding unit for internal combustion engine |
| KR20120068417A (en) * | 2010-12-17 | 2012-06-27 | 콘티넨탈 오토모티브 시스템 주식회사 | Method and apparatus for controlling engine of car |
| EP3012431B1 (en) * | 2014-10-21 | 2017-11-22 | Caterpillar Energy Solutions GmbH | Pre-combustion chamber assembly for internal combustion engines |
| CN104791141B (en) * | 2015-03-16 | 2017-12-08 | 山东建筑大学 | It is layered the mixed Daqu method of lean burn two-stroke LPG direct fuel-injection engines |
| CN204572256U (en) * | 2015-04-10 | 2015-08-19 | 尹平 | Automobile high efficiency burnt gas mixer |
| CN105156234A (en) * | 2015-10-21 | 2015-12-16 | 中国船舶重工集团公司第七�三研究所 | Combination gas blending device for gaseous propellant engine |
| CN106762236A (en) * | 2016-11-28 | 2017-05-31 | 哈尔滨工程大学 | A kind of gas/intake manifold of dual-fuel engine eddy flow accelerates mixing arrangement |
| CN208010480U (en) * | 2018-03-22 | 2018-10-26 | 中国第一汽车股份有限公司 | Engine intake duct |
| CN209053720U (en) * | 2018-11-22 | 2019-07-02 | 潍坊力创电子科技有限公司 | Gas engine air/gas mixing arrangement |
-
2018
- 2018-11-22 CN CN201811399774.0A patent/CN109236504B/en active Active
- 2018-11-22 CN CN202310973798.7A patent/CN116877302A/en active Pending
- 2018-11-22 CN CN202310973788.3A patent/CN117803498A/en active Pending
- 2018-11-22 CN CN202310973679.1A patent/CN116906222A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN116906222A (en) | 2023-10-20 |
| CN109236504B (en) | 2023-08-29 |
| CN117803498A (en) | 2024-04-02 |
| CN109236504A (en) | 2019-01-18 |
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