CN205858522U - The plasma system of natural gas engine - Google Patents
The plasma system of natural gas engine Download PDFInfo
- Publication number
- CN205858522U CN205858522U CN201620839456.1U CN201620839456U CN205858522U CN 205858522 U CN205858522 U CN 205858522U CN 201620839456 U CN201620839456 U CN 201620839456U CN 205858522 U CN205858522 U CN 205858522U
- Authority
- CN
- China
- Prior art keywords
- plasma
- exhaustor
- egr
- natural gas
- gas engine
- 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.)
- Expired - Fee Related
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000003345 natural gas Substances 0.000 title claims abstract description 19
- 239000003054 catalyst Substances 0.000 claims abstract description 14
- 230000033228 biological regulation Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 abstract description 25
- 239000003344 environmental pollutant Substances 0.000 abstract description 12
- 231100000719 pollutant Toxicity 0.000 abstract description 12
- 230000009466 transformation Effects 0.000 abstract description 8
- 238000011144 upstream manufacturing Methods 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 28
- 239000007789 gas Substances 0.000 description 21
- 239000008246 gaseous mixture Substances 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000000567 combustion gas Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000000977 initiatory effect Effects 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 102100021717 Early growth response protein 3 Human genes 0.000 description 1
- 101000896450 Homo sapiens Early growth response protein 3 Proteins 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses the plasma system of a kind of natural gas engine.This plasma system includes: air inlet pipe；Exhaustor；EGR pipe, its one end connects with described exhaustor, and the other end connects with described air inlet pipe, described EGR pipe is provided with EGR and regulates valve, and this EGR regulation valve controls to be connected with ECU；Plasma generator, it is arranged on described exhaustor, and is positioned at the upstream of described EGR pipe and exhaustor communicating position；And catalyst converter, it is arranged on described exhaustor, and is positioned at the downstream of described EGR pipe and exhaustor communicating position.The plasma system of this natural gas engine can shorten engine ignition time delay, accelerates cylinder flame spread speed, widens pinking border, thus improve efficiency of combustion, reduce HC discharge, simultaneously, it also is able to reduce the ignition energy of ignition system, improves ignition system reliability.It addition, this plasma system can improve the transformation efficiency of these three pollutant.
Description
Technical field
This utility model relates to natural gas engine field, particularly to the plasma system of a kind of natural gas engine
System.
Background technology
Along with country's Abgasgesetz is increasingly stricter, Exhaust Control of Engine is required more and more higher.For making natural gas
Electromotor meets Europe six and above emission level, and in present stage all emission control technique route, equivalent burning is (useless with EGR
Gas recirculating system) and the mode that combines of TWC (triple effect catalytic converter) be considered as mainstream technology.In the art, for
Reduce the NOx (nitrogen oxides) in aerofluxus as far as possible, portion discharge is introduced gas handling system, enter gas after air and combustion gas mixing
Cylinder burns, and due to the increase of the noble gas such as carbon dioxide in gaseous mixture, causes gas in-cylinder combustion to slow, simultaneously gaseous mixture
Specific heat capacity also increase, cause the reduction of in-cylinder combustion temperature, thus inhibit the generation of NOx.
In general EGR rate not can exceed that 20%, but for using the electromotor of equivalent burning, thermic load is higher, EGR
The increase of rate can substantially reduce the thermic load of electromotor, it is therefore desirable to increases EGR rate.But when EGR rate increases, gas handling system is drawn
After entering waste gas, the combustion stability of each cylinder of electromotor declines, and engine ignition also can be more difficult, needs to improve ignition energy
Amount, but the reliability decrease of ignition system can be made, and along with EGR rate (exhausted air quantity of introducing and the ratio of fresh combustion gases gaseous mixture
Rate) rising, the amount of consumed gas of electromotor can increase, engine power decline, HC (Hydrocarbon) discharges rising, simultaneously
Owing to using TWC to process CH4, NOx and the CO in aerofluxus, it is necessary to assure in TWC narrow range near stoichiometric proportion
The transformation efficiency of energy these three exhaust contaminant reaches the highest simultaneously, otherwise, will appear from the situation of deterioration of emission, three kinds of aerofluxus dirts
The transformation efficiency of dye thing is difficult to control.
The information being disclosed in this background section is merely intended to increase the understanding to general background of the present utility model, and
It is not construed as recognizing or imply in any form this information structure existing well known to persons skilled in the art
Technology.
Utility model content
The purpose of this utility model is to provide the plasma system of a kind of simple and reasonable natural gas engine,
The plasma system of this natural gas engine introduces asking of aerofluxus after-combustion stability decline in can improving cylinder
Topic, can shorten engine ignition time delay, accelerates cylinder flame spread speed, widens pinking border, thus improve efficiency of combustion,
Reduce HC discharge, simultaneously, it is also possible to reduce the ignition energy of ignition system, improve ignition system reliability.Further, since wait from
The addition of daughter, can improve the activity of catalyst, reduces the initiation temperature of pollutant, the maximum combustion points such as CH4, NOx and CO
Temperature and Burn-out temperature, thus improve the transformation efficiency of these three pollutant.
For achieving the above object, this utility model provides the plasma system of a kind of natural gas engine, and this is natural
The plasma system of gas electromotor includes: air inlet pipe；Exhaustor；EGR pipe, its one end connects with described exhaustor, the other end
Connecting with described air inlet pipe, described EGR pipe is provided with EGR and regulates valve, this EGR regulation valve controls to be connected with ECU；Plasma
Generator, it is arranged on described exhaustor, and is positioned at the upstream of described EGR pipe and exhaustor communicating position；And catalyst converter,
It is arranged on described exhaustor, and is positioned at the downstream of described EGR pipe and exhaustor communicating position.
Preferably, in technique scheme, plasma generator by being connected power supply with plasma electrical source.
Preferably, in technique scheme, plasma generator produces plasma by gaseous discharge method.
Preferably, in technique scheme, plasma generator be cylinder cartridge type, spool formula, needle plate type, filling bed type,
Line is board-like and flat.
Compared with prior art, this utility model has the advantages that the plasma system of this natural gas engine
System introduces, in can improving cylinder, the problem that aerofluxus after-combustion stability declines, and can shorten engine ignition time delay,
Accelerate cylinder flame spread speed, widen pinking border, thus improve efficiency of combustion, reduce HC discharge, simultaneously, it is also possible to reduce
The ignition energy of ignition system, improves ignition system reliability.Further, since the addition of plasma, catalyst can be improved
Activity, reduce the initiation temperature of pollutant, maximum combustion point temperature and the Burn-out temperature such as CH4, NOx and CO, thus improve this
The transformation efficiency of three kinds of pollutant.
Accompanying drawing explanation
Fig. 1 is the structural representation of the plasma system of natural gas engine of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings, detailed description of the invention of the present utility model is described in detail, it is to be understood that this practicality
Novel protection domain 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 and such as " comprising " or " including " etc. will be understood to comprise stated element or ingredient, and do not get rid of other yuan
Part or other ingredient.
As it is shown in figure 1, sending out according to the plasma system of the natural gas engine of this utility model detailed description of the invention
Motivation aerofluxus produces plasma and a part and introduces participation burning in gas handling system by egr system.And starting
The pollutant that the mode that in machine aerofluxus, generation plasma combines with catalyst converter processes in aerofluxus.The tool of this plasma system
Body structure includes: air inlet pipe 1, EGR pipe 2, EGR regulation valve 3, plasma generator 5, plasma electrical source 6 and catalyst converter 7.
Air in air inlet pipe 1 and the gaseous mixture of combustion gas are being contained within after isoionic EGR gas mixes with EGR pipe 2, enter cylinder quilt
Burning lighted by spark plug 4, and the aerofluxus after having burnt enters plasma generator 5 and produces plasma, containing plasma
An aerofluxus part be reintroduced in gas handling system participate in burning, another part is directly discharged into air after catalyst converter 7
In environment, in egr system, EGR3 regulation valve is controlled its aperture by ECU, thus accurately controls to introduce the capacity of gas handling system
The size i.e. size of EGR rate.The plasma system of this natural gas engine introduces aerofluxus in can improving cylinder
The problem that after-combustion stability declines, can shorten engine ignition time delay, accelerates cylinder flame spread speed, widens pinking limit
Boundary, thus improve efficiency of combustion, reduce HC discharge, simultaneously, it is also possible to reduce the ignition energy of ignition system, improve ignition system
Reliability.Further, since the addition of plasma, the activity of catalyst can be improved, reduce the pollutant such as CH4, NOx and CO
Initiation temperature, maximum combustion point temperature and Burn-out temperature, thus improve the transformation efficiency of these three pollutant.
Specifically, one end of EGR pipe 2 connects with waste pipe 8, and the other end connects with air inlet pipe 1, by part
Aerofluxus introduces and enters cylinder combustion after gas handling system, with air and combustion gas mixing, due to the indifferent gas such as carbon dioxide in gaseous mixture
The increase of body, causes gas in-cylinder combustion to slow, and the specific heat capacity of gaseous mixture also increases simultaneously, causes the fall of in-cylinder combustion temperature
Low, thus inhibit the generation of NOx.In egr system, EGR regulation valve 3 is arranged in EGR pipe 2, and controls to be connected with ECU,
Controlled its aperture by ECU, thus accurately control to introduce the size i.e. size of EGR rate of the capacity of gas handling system.EGR i.e. aerofluxus
Recirculation (Exhaust Gas Recirculation), the part discharging gas is isolated and is led by internal combustion engine after combustion
Enter the technology (maneuver or method) that air inlet side makes it burn once again.Main purpose is to reduce the nitrogen oxides discharged in gas
(NOx)。
Air enters cylinder, after EGR pipe 2 connects with air inlet pipe 1, in air inlet pipe 1 with the gaseous mixture of combustion gas by air inlet pipe 1
The gaseous mixture of air and combustion gas after mixing with the EGR gas in EGR pipe 2, enter cylinder and lighted burning by spark plug 4.
Plasma generator 5 is arranged on waste pipe 8, and is positioned at EGR pipe 2 and exhaustor communicating position
Upstream.Plasma generator 5 is powered by plasma electrical source 6, and the aerofluxus after having burnt enters plasma generator 5
Plasma can be produced, as glow discharge, radio-frequency discharge, microwave discharge, corona discharge and medium hinder by gaseous discharge method
Gear electric discharge, after discharge, in plasma generator 5, the generation extremely strong NO2 of oxidisability, O, OH, O3, metastable nitrogen are former
The free active ions such as son, oxygen atom, gas componant main in gas handling system is CH4, N2, O2 and H2O etc., and containing wait from
An aerofluxus part for daughter be reintroduced in gas handling system participate in burning, in the aerofluxus being introduced into except N2, CO2,
Outside H2O, O2, THC, NOx and CO, the most substantial amounts of chemism base such as O atom, H atom, OH base etc., mix with combustion mixture
Entering after conjunction in cylinder, these chemical active radicals can destroy the balance of combustion system, and luring aoxidizes chain reaction,
Thus shorten spark delay, accelerate burning velocity, thus suppress the generation of pinking.On the one hand the existence of active group can improve
Efficiency of combustion, such that it is able to reduce the generation of THC pollutant；On the other hand, EGR rate (more than 20%) can be increased greatly,
The EGR rate breaking through prior art condition limits, so that the amplitude of the thermic load of electromotor and NOx reduction is bigger, and pinking border
Wider, the better reliability of electromotor.
Preferably, the form of plasma generator 5 can be multiple, in general can be cylinder-cartridge type, line-cartridge type,
Pin-board-like, filling bed type, line-board-like, flat etc..
Catalyst converter 7 is arranged on waste pipe, and is positioned at the downstream of EGR pipe 2 and exhaustor communicating position.Contain
Another part of the aerofluxus of plasma is directly discharged in atmospheric environment after catalyst converter 7, utilizes the plasma in aerofluxus
The activity that can make catalyst is improved, and the initiation temperature of exhaust contaminant, maximum combustion point temperature and Burn-out temperature are all incited somebody to action
Significantly reduce, thus improve the transformation efficiency of pollutant in catalyst converter.
To sum up, aerofluxus after-combustion is introduced in the plasma system of this natural gas engine can improve cylinder steady
The problem of qualitative decline, can shorten engine ignition time delay, accelerates cylinder flame spread speed, widens pinking border, thus
Improve efficiency of combustion, reduce HC discharge, simultaneously, it is also possible to reduce the ignition energy of ignition system, improve ignition system reliability.
Further, since the addition of plasma, the activity of catalyst can be improved, reduce the ignition temperature of the pollutant such as CH4, NOx and CO
Degree, maximum combustion point temperature and Burn-out temperature, thus improve the transformation efficiency of these three pollutant.
The aforementioned description to specific illustrative embodiment of the present utility model illustrates that and the purpose of illustration.These
Describe and be not wishing to be defined to this utility model disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can carry out
A lot of changes and change.The purpose selected exemplary embodiment and describe is to explain certain principles of the present utility model
And reality application, so that those skilled in the art is capable of and utilizes various different example of the present utility model
Property embodiment and various different selection and change.Scope of the present utility model be intended to by claims and etc. similar shape
Formula is limited.
Claims (4)
1. the plasma system of a natural gas engine, it is characterised in that including:
Air inlet pipe；
Exhaustor；
EGR pipe, its one end connects with described exhaustor, and the other end connects with described air inlet pipe, and described EGR pipe is provided with EGR
Regulation valve, this EGR regulation valve controls to be connected with ECU；
Plasma generator, it is arranged on described exhaustor, and is positioned at the upper of described EGR pipe and exhaustor communicating position
Trip；And
Catalyst converter, it is arranged on described exhaustor, and is positioned at the downstream of described EGR pipe and exhaustor communicating position.
The plasma system of natural gas engine the most according to claim 1, it is characterised in that described plasma is sent out
Raw device by being connected power supply with plasma electrical source.
The plasma system of natural gas engine the most according to claim 1, it is characterised in that described plasma is sent out
Raw device produces plasma by gaseous discharge method.
The plasma system of natural gas engine the most according to claim 3, it is characterised in that described plasma is sent out
Raw device is that cylinder cartridge type, spool formula, needle plate type, filling bed type, line are board-like and flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620839456.1U CN205858522U (en) | 2016-08-04 | 2016-08-04 | The plasma system of natural gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620839456.1U CN205858522U (en) | 2016-08-04 | 2016-08-04 | The plasma system of natural gas engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205858522U true CN205858522U (en) | 2017-01-04 |
Family
ID=57656978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620839456.1U Expired - Fee Related CN205858522U (en) | 2016-08-04 | 2016-08-04 | The plasma system of natural gas engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205858522U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050485A (en) * | 2016-08-04 | 2016-10-26 | 广西玉柴机器股份有限公司 | Plasma system of natural gas engine |
-
2016
- 2016-08-04 CN CN201620839456.1U patent/CN205858522U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050485A (en) * | 2016-08-04 | 2016-10-26 | 广西玉柴机器股份有限公司 | Plasma system of natural gas engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |