CN106438114A - Multi-point port injection gas engine stratified combustion system - Google Patents
Multi-point port injection gas engine stratified combustion system Download PDFInfo
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- CN106438114A CN106438114A CN201610896296.9A CN201610896296A CN106438114A CN 106438114 A CN106438114 A CN 106438114A CN 201610896296 A CN201610896296 A CN 201610896296A CN 106438114 A CN106438114 A CN 106438114A
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- gas
- egr
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Classifications
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- 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
-
- 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
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0284—Arrangement of multiple injectors or fuel-air mixers per combustion chamber
-
- 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
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- 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)
Abstract
The invention discloses a multi-point port injection gas engine stratified combustion system. The gas engine stratified combustion system comprises an EGR mixer, a first gas inlet manifold, an intercooler, gas nozzles, an EGR cooler and a second gas inlet manifold, wherein gas outlets of the first gas inlet manifold are communicated with first gas inlet valves through first gas channels of cylinders correspondingly; the outlet end of the intercooler is provided with a first gas throttling valve which is correspondingly communicated with a gas inlet of the first gas inlet manifold and a first inlet of the EGR mixer; the gas nozzles correspond to the cylinders of a gas engine one to one in the aspect of the number, and the gas nozzles are communicated with the first gas channels of the cylinders; the inlet end of the EGR cooler is communicated with a high temperature exhaust manifold before vortex, and the outlet end of the EGR cooler is provided with an EGR valve which is then communicated with a second inlet of the EGR mixer; and the second gas inlet manifold is communicated with an outlet of the EGR mixer and is communicated with second gas inlet valves of the cylinders through second gas channels of the cylinders correspondingly. The gas engine stratified combustion system reduces emission of NOX and keeps a high flame propagation speed while heat loads of the engine are lowered.
Description
Technical field
The present invention relates to gas engine field, particularly to the gas engine stratified combustion of a kind of multi-point gas-duct jetting
System.
Background technology
The noxious emission of engine is the main source causing atmosphere pollution, important with environmental protection problem
Property increasingly increase, reduce engine noxious emission and CO2Discharging this target becomes one of development of engine in the world today
Important directions.So carrying out Fuel Economy lifting, NOX, the research of the noxious emission control method such as THC and technology
It is the top priority of all engine designer.Wherein for reducing the NO in motor exhaustX(nitrogen oxides) discharges, and EGR is (useless
Gas recirculating system) pass through retarded combustion process as a kind of technological means, reduce the technology of in-cylinder combustion temperature, can be effective
Reduce waste gas discharge in NOXContent.And gas engine substitutes as the main cleaning burning of diesel engine currently on the market
Product, it can effectively reduce engine CO2Discharge and PM discharge.The state five of production and sales in the market discharges combustion gas and sends out
Motivation mainly reaches emission request by lean burn+oxidized form (GOC) post-processing technology means, but to reach more higher leveled
State six discharges, and needs to introduce SCR system on the basis of lean burn+GOC, or uses equivalent burning+EGR+ three-effect catalysis
Converter (TWC).And there is production cost and the high defect of customer using cost in lean-burn+GOC+SCR route, therefore equivalent burning+
EGR+ triple effect catalytic converter (TWC) becomes a main flow gas engine technology path of an our times.
But, it is big to there is sub-load pumping loss in traditional equivalent+EGR engine, and engine is due to by burning speed
The impacts such as degree reduces, the limit value of ignition system performance, it is impossible to realize higher EGR rate.Simultaneously because burning velocity reduces, start
Machine circular wave is big, and poor combustion stability, engine fire risk is big.
The information being disclosed in this background section is merely intended to increase the understanding of the general background to the present invention, and should not
When being considered to recognize or imply in any form prior art well known to persons skilled in the art for this information structure.
Content of the invention
It is an object of the invention to provide the gas engine layering combustion of a kind of simple and reasonable multi-point gas-duct jetting
Burning system, the gas engine laminating combustion system of this multi-point gas-duct jetting is capable of around spark plug suitable fuel and sky
Gas and the gaseous mixture of a small amount of EGR gas, and it around casing wall, is the air, fuel mixture that EGR gas concentration is higher, Jin Eryou
The EGR that utilizes of effect reduces NOXKeep higher flame propagation velocity while discharge, reduction engine heat load, thus realize
The efficient organic of engine economy, discharge performance and durability combines.
For achieving the above object, the invention provides the gas engine laminating combustion system of a kind of multi-point gas-duct jetting,
The gas engine laminating combustion system of this multi-point gas-duct jetting includes：EGR mixer；First inlet manifold, its each give vent to anger
Mouth is respectively by the first air flue and the connection of the first inlet valve of each cylinder；Charge air cooler, its port of export is provided with first segment valve, and this is years old
One air throttle the first inlet communication with the air inlet of described first inlet manifold and described EGR mixer respectively；Gas nozzle,
Its number and each cylinder one_to_one corresponding of gas engine, and connect with described first air flue of each cylinder；Cooler for recycled exhaust gas, its entrance
End connects with high-temperature exhaust air house steward before whirlpool, and the port of export of this cooler for recycled exhaust gas is provided with EGR valve, and this EGR valve mixes with described EGR
Second inlet communication of device；And second inlet manifold, its outlet with described EGR mixer, and pass through each cylinder respectively
The second air flue connect with the second inlet valve of each cylinder.
Preferably, in technique scheme, the first import of EGR mixer is provided with second section valve.
Preferably, in technique scheme, gas engine is four-valve engine.
Compared with prior art, the present invention has the advantages that：The gas engine layering of this multi-point gas-duct jetting
Combustion system uses twin-inlet, and an air intake duct enters fuel and air Mixture, and another enters EGR gas or EGR
And fresh air, it is capable of around spark plug the gaseous mixture of suitable fuel and air and a small amount of EGR gas, and casing wall is all
Enclosing is the air, fuel mixture that EGR gas concentration is higher, and then effectively utilizes EGR to reduce NOXDischarge, reduction engine
Keep higher flame propagation velocity while thermic load, thus realize engine economy, discharge performance and durability
Efficient organic combines.
Brief description
Fig. 1 is the structural representation of the gas engine laminating combustion system of the multi-point gas-duct jetting of the present invention.
Fig. 2 is an operating condition fall pumping loss principle schematic in the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the detailed description of the invention of the present invention is described in detail, it is to be understood that the guarantor of the present invention
Scope of protecting is not limited by detailed description of the invention.
Explicitly indicating that unless otherwise other, otherwise in entire disclosure and claims, term " includes " or it becomes
Change such as "comprising" or " including " etc. and will be understood to comprise stated element or part, and do not get rid of other yuan
Part or other parts.
As it is shown in figure 1, according to the gas engine stratified combustion system of the multi-point gas-duct jetting of the specific embodiment of the invention
System can only be applied on four-valve engine, and its concrete structure includes：Turbocharger the 3rd, charge air cooler the 4th, first segment valve the 5th,
Before two air throttles the 6th, gas nozzle the 8th, the first inlet manifold the 9th, the first inlet valve the 1st, whirlpool, high-temperature exhaust air house steward the 10th, cooler for recycled exhaust gas is the 11st,
EGR valve the 12nd, EGR mixer the 13rd, the second inlet manifold 14 and the second inlet valve 2.Wherein, turbocharger the 3rd, charge air cooler the 4th, first
Air throttle the 5th, gas nozzle the 8th, the first inlet manifold the 9th, the first inlet valve 1 forms an air inlet entering fuel and air Mixture
Road, before second section valve the 6th, whirlpool, the 13rd, the second air inlet of high-temperature exhaust air house steward the 10th, cooler for recycled exhaust gas the 11st, EGR valve the 12nd, EGR mixer is total
Pipe 14 and the second inlet valve 2 form an air intake duct entering EGR gas or EGR and fresh air, thus divide in realizing cylinder
Grate firing burns, and can effectively keep the advantage of the good economy performance of tradition equivalent+EGR engine, can also effectively reduce simultaneously
The fuel residual volume in burning dead band, reduces THC, CH4Deng discharge.
Specifically, first segment valve 5 is arranged on the port of export of charge air cooler 4, more total with the first air inlet respectively by pipeline
Pipe 9 and the first inlet communication of EGR mixer 13, second section valve 6 is arranged on the first import of EGR mixer 13；First enters
Gas house steward 9 is connected by first air flue and the first inlet valve 1 of each cylinder respectively, the number of gas nozzle 8 and gas engine
Each cylinder one_to_one corresponding, and connect with the first air flue of each cylinder, it is cold that fresh air enters charge air cooler 4 after turbocharger 3 supercharging
But, a part enters back into the first inlet manifold 9, enters back into the first air flue corresponding to the first inlet valve 1, enters with by gas nozzle 8
The fuel mixing entering, the gaseous mixture of fuel and fresh air enters cylinder by the first inlet valve 1；By performance and gas
The structure designs such as seat ring, valve cone angle, central area in the gas inflow cylinder by the first inlet valve 1.
Before whirlpool, high-temperature exhaust air house steward 10 connects with the arrival end of cooler for recycled exhaust gas 11, and EGR valve 12 is arranged on cooler for recycled exhaust gas 11
The port of export, then the second inlet communication with EGR mixer 13, the outlet of EGR mixer 13 connects with the second inlet manifold 14,
Second inlet manifold 14 is connected with the second inlet valve 2 of each cylinder by the second air flue of each cylinder respectively, and waste gas enters high temperature before whirlpool
After exhaust main 10, a part (EGR gas) enters cooler for recycled exhaust gas 11 and cools down, and enters back into EGR mixer 13 and mixes with fresh air
Closing and entering the second inlet manifold 14, the gaseous mixture of EGR gas or EGR gas and fresh air enters the from the second inlet manifold 14
The second air intake duct corresponding to two inlet valves 2, enters cylinder by the second inlet valve 2.And enter cylinder by the second inlet valve 2
Gas have compared with maelstrom and bigger radius of turn, EGR gas or EGR, the gaseous mixture of fresh air along cylinder wall
Enter cylinder, around filling piston ring top, cylinder wall, thus realize that zone line is fuel concentration, fresh air
Concentration is of a relatively high and internal layer gaseous mixture that EGR gas concentration is low, and the fringe region around casing wall is EGR gas concentration
Outer layer gaseous mixture high, that fuel concentration is low.Gaseous mixture can effectively be lighted by the spark plug being so in center, and has
There is higher flame propagation velocity；And owing to around casing wall, the burning dead band such as piston ring top assembles is incombustible EGR
Gas or fresh air, can fully absorb central area release heat energy, effectively reduce simultaneously conventional gas engine by
In THC, the CH that cannot burn that combustion chamber dead band is brought4Discharge, it is achieved engine combustion stability, economy and low emission
Combination.
This system can also take different control combustion system according to engine loading difference, and specific works mode is as follows：
When working under engine is in compared with Smaller load (pressure subatmospheric after air throttle), second section valve 6 is complete
Close, the second inlet manifold 14 only introduce EGR gas, and combustion gas, fresh air from the first inlet manifold 9 by the first inlet valve
1 entrance cylinder.Now, owing to the only first inlet valve 1 introduces fresh air and fuel, in order to ensure with conventional engines phase
Same air inflow, then need to strengthen first segment valve 5 aperture, increase the admission pressure entering cylinder, as in figure 2 it is shown, admission pressure
Increase can effectively reduce engine pumping loss, thus improve engine thermal efficiency.Meanwhile, by the second inlet manifold
14 and second inlet valve 2 enter the EGR gas of cylinder and can effectively fill the burning dead band around casing wall, can inhale again simultaneously
Receive in-cylinder combustion temperature, effectively reduce engine maximum combustion temperature, thus reduce engine NOXDischarge, it is achieved improve and send out
Motivation combustion gas economy, reduction NOX、THC、CH4Deng discharge, reduce engine heat load, widen engine fire border, it is achieved
Effective combination of multiple advantages such as engine economy, discharge, thermic load, stability under high EGR rate.And in air inlet cylinder
The amount of EGR gas can realize accurately controlling by EGR valve and related sensor.When engine is in boost pressure relatively
Under high moderate duty or full load, second section valve 6 controls aperture according to the needs of actual air inflow, it is achieved fresh air
Simultaneously enter from the first inlet valve 1 and 2 two inlet valves of the second inlet valve, so still can keep tradition four-valve engine
The high advantage of charging efficiency.Using twin-inlet, an air intake duct enters fuel and air Mixture, an entrance EGR gas
Or EGR and fresh air, it is achieved stratified combustion in cylinder, can effectively keep the good economy performance of tradition equivalent+EGR engine
Advantage, the fuel residual volume in burning dead band can also be effectively reduced simultaneously, reduce THC, CH4Deng discharge.
The operating mode that pressure reduction is big before and after the big air throttle of pumping loss, by single air flue air inlet pattern, can effectively reduce
Engine pumping loss, thus improve the efficiency of Smaller load in engine.Particularly idling operation, City Bus driving cycle road spectrum has
40～60% is idling operation, and the pumping loss being reduced idling by this technology can effectively reduce idling gas consumption, improves car load
Economy.
To sum up, the gas engine laminating combustion system of this multi-point gas-duct jetting is capable of suitably firing around spark plug
Material and the gaseous mixture of air and a small amount of EGR gas, and it around casing wall, is the air, fuel mixture that EGR gas concentration is higher,
And then effectively utilize EGR to reduce NOXHigher flame propagation velocity is kept while discharge, reduction engine heat load, from
And realize the efficient organic combination of engine economy, discharge performance and durability.
The aforementioned description to the specific illustrative embodiment of the present invention illustrates that and the purpose of illustration.These describe
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can much change
And change.The purpose carrying out selecting and describe to exemplary embodiment is to explain that the certain principles of the present invention and reality thereof should
With so that those skilled in the art be capable of and utilize the present invention various different exemplary and
Various different selections and change.The scope of the present invention is intended to be limited by claims and equivalents thereof.
Claims (3)
1. the gas engine laminating combustion system of a multi-point gas-duct jetting, it is characterised in that include：
EGR mixer；
First inlet manifold, its each gas outlet is respectively by the first air flue and the connection of the first inlet valve of each cylinder；
Charge air cooler, its port of export is provided with first segment valve, the air inlet with described first inlet manifold respectively of this first segment valve
Mouth and the first inlet communication of described EGR mixer；
Each cylinder one_to_one corresponding of gas nozzle, its number and gas engine, and connect with described first air flue of each cylinder；
Cooler for recycled exhaust gas, its arrival end connects with high-temperature exhaust air house steward before whirlpool, and the port of export of this cooler for recycled exhaust gas is provided with EGR valve,
This EGR valve and the second inlet communication of described EGR mixer；And
Second inlet manifold, its outlet with described EGR mixer, and respectively by the second air flue of each cylinder and each cylinder
Second inlet valve connection.
2. the gas engine laminating combustion system of multi-point gas-duct jetting according to claim 1, it is characterised in that described
First import of EGR mixer is provided with second section valve.
3. the gas engine laminating combustion system of multi-point gas-duct jetting according to claim 1, it is characterised in that described
Gas engine is four-valve engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610896296.9A CN106438114A (en) | 2016-10-13 | 2016-10-13 | Multi-point port injection gas engine stratified combustion system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610896296.9A CN106438114A (en) | 2016-10-13 | 2016-10-13 | Multi-point port injection gas engine stratified combustion system |
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| CN106438114A true CN106438114A (en) | 2017-02-22 |
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| CN201610896296.9A Pending CN106438114A (en) | 2016-10-13 | 2016-10-13 | Multi-point port injection gas engine stratified combustion system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218120A (en) * | 2017-05-24 | 2017-09-29 | 上海如流实业有限公司 | Vortex knockout device |
| CN108361127A (en) * | 2018-04-24 | 2018-08-03 | 吉林大学 | A kind of bi-fuel internal combustion engine Variable tumble layering EGR inlet ducts and its control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218120A (en) * | 2017-05-24 | 2017-09-29 | 上海如流实业有限公司 | Vortex knockout device |
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| CN108361127A (en) * | 2018-04-24 | 2018-08-03 | 吉林大学 | A kind of bi-fuel internal combustion engine Variable tumble layering EGR inlet ducts and its control method |
| CN108361127B (en) * | 2018-04-24 | 2023-07-04 | 吉林大学 | Variable tumble layering EGR (exhaust gas recirculation) air inlet device of dual-fuel internal combustion engine and control method thereof |
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Application publication date: 20170222 |
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