CN110374765A - Scheme for exhaust gas circulation system and its engine with gas fuel - Google Patents
Scheme for exhaust gas circulation system and its engine with gas fuel Download PDFInfo
- Publication number
- CN110374765A CN110374765A CN201810324597.3A CN201810324597A CN110374765A CN 110374765 A CN110374765 A CN 110374765A CN 201810324597 A CN201810324597 A CN 201810324597A CN 110374765 A CN110374765 A CN 110374765A
- Authority
- CN
- China
- Prior art keywords
- scheme
- mixer
- circulation system
- gas
- exhaust gas
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000002485 combustion reaction Methods 0.000 claims abstract description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003345 natural gas Substances 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 239000002250 absorbent Substances 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000004677 Nylon Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000003546 flue gas Substances 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- -1 polypropylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims 1
- 238000007689 inspection Methods 0.000 claims 1
- 230000006870 function Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000003643 water by type Substances 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
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Silencers (AREA)
Abstract
The application provides a kind of scheme for exhaust gas circulation system, for the vehicle with gas fuel, including gas pipeline, air pipe line, exhaust pipe, air inlet pipe, mixer and combustion chamber, the gas pipeline is connected to so that natural gas is imported the mixer with the mixer, the air pipe line is connected to direct the air into the mixer with the mixer, described exhaust pipe one end is connected to the mixer, the other end is connected to the exhaust pipe in the combustion chamber downstream, described air inlet pipe one end is connected to the mixer, one end is connected to the inlet end of the combustion chamber, liquid water treatment facilities is provided in the scheme for exhaust gas circulation system.Liquid water treatment facilities can liquid water after engine stop handled so that the liquid water will not damage engine.
Description
Technical field
The application is in relation to a kind of scheme for exhaust gas circulation system and its engine with fossil fuel, and especially one kind is with day
The scheme for exhaust gas circulation system and its engine of right gas fuel.
Background technique
Gas recirculation system (EGR, Exhaust Gas Recirculation) is useless by what is generated in engine fuel
The sub-fraction of gas sends cylinder back to again, so as to so that full combustion of gas, improve the utilization efficiency of fuel and reduce exhaust gas to
Discharge in air.EGR gas is due to will retarded combustion process with inertia, that is to say, that burning velocity will slow down
Slow down so as to cause the pressure initiation process in combustion chamber.In addition, total exhaust gas flow (mass can be made by improving ER EGR Rate
Flow it) reduces, therefore pollutant output quantity total in exhaust gas discharge opposite will be reduced.The task of egr system is exactly to make exhaust gas
Recirculation volume reach optimum in each operating point, to make combustion process be in optimal situation always, most
Guarantee that the succession in emission is minimum eventually.
In the natural gas engine using gas recirculation system, due to containing in the main component after combustion of natural gas
A large amount of water.In gas recirculation system work, the temperature of whole system is higher than 100 degree, at this point, wrapping in recirculating system
The gaseous water for including part, does not have much affect for system.However, after engine stop, in systems gaseous
Water vapour can be condensed into the water of liquid, largely be present in entire exhaust pipe.If ambient temperature is too low, the water of liquid can be tied
Ice.In exhaust gas recirculation circuit, it is provided with some control units and detection part, including some function sensors, Yi Xiegong
The structures such as energy threshold and Venturi tube, liquid water accumulate in around above-mentioned component, on the one hand will cause the component corrosion, another party
Face freezes if formed in these components for being relatively easy failure, part is likely to result in when being again started up engine
Component can not normal use.
Summary of the invention
The purpose of the application solves the liquid water after engine is shut down in the prior art in exhaust pipe to waste gas circulation system
The problem of system causes.
To complete foregoing invention purpose, on the one hand the application provides a kind of scheme for exhaust gas circulation system, for having natural gas combustion
The vehicle of material, including gas pipeline, air pipe line, exhaust pipe, air inlet pipe, mixer and combustion chamber, the natural gas tube
Road is connected to so that natural gas is imported the mixer with the mixer, and the air pipe line is connected to by air with the mixer
The mixer is imported, described exhaust pipe one end is connected to the mixer, the exhaust pipe of the other end and the combustion chamber downstream
Connection, described air inlet pipe one end are connected to the mixer, and one end is connected to the inlet end of the combustion chamber, the waste gas circulation
Liquid water treatment facilities is provided in system.
To complete foregoing invention purpose, on the other hand the application provides a kind of engine with gas fuel, including
Scheme for exhaust gas circulation system as described above.
By above-mentioned setting, liquid water treatment facilities can liquid water after engine stop handled so that should
Liquid water will not damage engine.
Detailed description of the invention
The exemplary embodiment of the application is described in detail below with reference to the accompanying drawings, it should be understood that described below
Embodiment be only used for explain the application, without being restricted to scope of the present application, appended attached drawing wherein:
Fig. 1 is the structure chart of one embodiment of the scheme for exhaust gas circulation system of the application.
Specific embodiment
In different drawings, the same or similar component is presented with like reference characters.
It should be appreciated that attached drawing is only used for being illustrated the application, the wherein size, proportionate relationship of component and component
Number is not as the limitation to the application.
Refering to Figure 1, the scheme for exhaust gas circulation system 10 of the application is mainly used for the vehicle with gas fuel, including
Gas pipeline 11, air pipe line 12, exhaust pipe 13, air inlet pipe 101, mixer 14 and combustion chamber 15.The gas pipeline
11 include natural gas tank 110 and some conveying accessories, is connected with mixer 14, to by natural gas transportation to mixer 14
It is interior.Air pipe line 12 is also connected to mixer 14, by fresh air input mixer 14.Described 13 one end of exhaust pipe and place
Exhaust pipe 103 in 15 downstream of combustion chamber is connected to, and the other end is communicated to mixer 14, so that part spontaneous combustion room 15 is discharged
Exhaust gas imports mixer 14.Air inlet pipe 101 is provided between mixer 14 and combustion chamber 15, thus by mixing in mixer 14
The inlet end of gas spontaneous combustion room 15 afterwards, which imports in combustion chamber 15, to burn.15 downstream of combustion chamber is provided with exhaust pipe
103, the exhaust gas section being discharged in combustion chamber 15 enters recycling by the exhaust pipe 13 of access exhaust pipe 103, and part is arranged
Enter air.
It is provided with multiple functional components within exhaust pipe 13, for ease of description, is classified as controlling in this application
Component and detection part processed.So-called control unit includes at least the valve 170 that is set in exhaust pipe 13, Venturi tube 171 and
Other devices for being used to control gas flowing.Detection part includes at least pressure sensor 180, temperature sensor 181 and other
The information collection apparatus for being used to detect the working condition in exhaust pipe 13 of type.
Because its structure is complicated, size is smaller for pipeline for above-mentioned control unit and detection part.Therefore, work as hair
After motivation is shutdown status, since a large amount of water vapours of combustion of natural gas formation are in exhaust pipe 13, mixer 14 and air inlet
It will form liquid water in 101 range of pipe largely to gather.If these liquid waters accumulate in it is comparatively crucial and be easy function by
The control unit of influence and the region of detection part, on the one hand can corrode associated components, once on the other hand its icing causes institute
It states control unit or detection part blocking or loses function, then will cause system when starting engine next time cannot normal work
Make.
It include liquid water treatment facilities in the scheme for exhaust gas circulation system 10 of the application, to make please continue to refer to shown in Fig. 1
Liquid water in scheme for exhaust gas circulation system 10, which will not be formed control unit or detection part, to be destroyed.In the present embodiment, institute
Stating liquid water treatment facilities includes the header tank or drain valve 100 for being set to 101 bottom of mixer 14 or air inlet pipe.It is useless in setting
When each component of the gas circulatory system 10, the physical location of mixer 14 and air inlet pipe 101 is generally also at lower position, this
Sample, when forming liquid water, due to the effect of gravity, liquid water natively can to lower place accumulation, using header tank or
Water can be collected in case or be discharged by drain valve 100, in this way will not in scheme for exhaust gas circulation system 10 control unit or detection
Component, which is formed, to be destroyed.
Liquid water treatment facilities in the scheme for exhaust gas circulation system 10 of the application can also show as one kind and be set to flue gas leading
A kind of water-absorbent material of the inner surface on road 13, mixer 14 and air inlet pipe 101, this water-absorbent material can be set in above-mentioned component
One or more of.The ingredient of above-mentioned water-absorbent material is preferably nylon material, polythene material or polypropylene material.Starting
When machine works, the temperature in exhaust pipe 13, mixer 14 and air inlet pipe 101 is higher, so water base exists with gaseous form,
Content is seldom in water-absorbent material.When engine shuts down meeting, vaporous water can be converted into liquid water, and the water absorbing capacity of water-absorbent material
The liquid water newly formed can be adsorbed, so that liquid water is not accumulated in the critical component such as control unit or detection part
On.
Liquid water treatment facilities in the scheme for exhaust gas circulation system 10 of the application can also show as being set to exhaust-gas treatment pipe
Gas nozzle 131 in road 13, the gas nozzle 131 are connected to the high-pressure air source 132 on vehicle.After engine stop, the gas nozzle 131
High pressure gas is blown into exhaust pipe 13, is gathered to control liquid water to scheduled position.So the setting of gas nozzle 131 takes
The setting position of control unit and detection part certainly in exhaust pipe 13.Preferably, which is set to control unit
Upstream and/or the upstream of detection part, blow gas nozzle 131 downstream.The setting angle of gas nozzle 131 and the pressure of high pressure gas
It can suitably adjust, in the present embodiment, the gas nozzle 131 is blown into angle and the institute of high pressure gas into the exhaust pipe 13
That states exhaust gas in exhaust pipe 13 is blown into angle in 40-70 degree angles, and preferably 60 degree, the pressure 3-7 of the high pressure gas
Bar, preferably 5 bars.
Above-described liquid water treatment facilities can select a use, can also be superimposed use.
In order to control the work of each component, the scheme for exhaust gas circulation system 10 of the application further includes controller 16, controller 16 with
Control unit and the connection of detection part signal, to receive the signal of detection part and control unit is made to work by predetermined way.
The controller 16 can be the ECU control device of vehicle itself, or the control device being separately provided.
At work, in embodiments herein, when scheme for exhaust gas circulation system 10 is opened, vehicle is detected by controller 16
Speed is 0 and engine speed is 0, and system thinks engine machine state to shut down at this time.16 late release ECU power supply of controller
Time, control gas nozzle 131 downstream spray high pressure gas to the predetermined time.Controller 16 can control the valve in control unit and beat
It opens, so that the liquid water in valve be made to gather to predetermined direction.Controller 16 controls drain valve 100 and opens draining.Aforesaid way can
To be set as needed.
The application also provides a kind of engine, which includes above-mentioned scheme for exhaust gas circulation system, therefore also be can solve existing
Liquid water accumulates in puzzlement caused by control unit or detection part in technology.
The application is described only in conjunction with the most practical preferred embodiment being presently considered above, it is to be understood that
Above description is not the limitation to the application, and the application is also not limited to the example above, the ordinary skill people of the art
The variations, modifications, additions or substitutions that member is made in the essential scope of the application, also should belong to the protection scope of the application.
Claims (10)
1. a kind of scheme for exhaust gas circulation system (10), for the vehicle with gas fuel, including gas pipeline (11), air hose
Road (12), exhaust pipe (13), air inlet pipe (101), mixer (14) and combustion chamber (15), the gas pipeline (11) and institute
Mixer (14) connection is stated so that natural gas is imported the mixer (14), the air pipe line (12) and the mixer (14) are even
Pass to and direct the air into the mixer (14), described exhaust pipe (13) one end is connected to the mixer (14), the other end with
The exhaust pipe (103) in combustion chamber (15) downstream is connected to, and described air inlet pipe (101) one end is connected to the mixer (14),
One end is connected to the inlet end of the combustion chamber (15), which is characterized in that is provided with liquid in the scheme for exhaust gas circulation system (10)
Water treatment facilities.
2. scheme for exhaust gas circulation system (10) as described in claim 1, which is characterized in that the liquid water treatment facilities includes setting
Header tank or drain valve (100) in the mixer (14) or the air inlet pipe (101) bottom.
3. scheme for exhaust gas circulation system (10) as described in claim 1, which is characterized in that the liquid water treatment facilities is to be set to
Water-absorbent material including the exhaust pipe (13) and/or mixer (14) and/or the air inlet pipe (101) inner wall, preferably
Nylon material, polythene material or polypropylene material.
4. the scheme for exhaust gas circulation system (10) as described in claims 1 or 2 or 3, which is characterized in that the liquid hydrotreater includes
It is set to the gas nozzle (131) for blowing high pressure gas in the exhaust pipe (13) to the mixer (14) direction, the gas nozzle
(131) it is connected to the high-pressure air source on the vehicle.
5. scheme for exhaust gas circulation system (10) as claimed in claim 4, which is characterized in that be provided with control in the exhaust pipe (13)
Component processed, the gas nozzle (131) are set to the control unit upstream.
6. scheme for exhaust gas circulation system (10) as claimed in claim 5, which is characterized in that the control unit includes at least one
Valve includes controller (16) that the controller (16) is configured in the vehicle motor in the scheme for exhaust gas circulation system (10)
The valve controlled in the control unit after shutdown is opened.
7. scheme for exhaust gas circulation system (10) as claimed in claim 4, which is characterized in that be provided with inspection in the exhaust pipe (13)
Component is surveyed, the gas nozzle (131) is set to the detection part upstream.
8. scheme for exhaust gas circulation system (10) as claimed in claim 4, which is characterized in that the scheme for exhaust gas circulation system (10) includes control
Device (16) processed, the controller (16) are configured to control the high-pressure air source from the gas nozzle after the vehicle motor is shut down
(131) high pressure gas is blown in Xiang Suoshu exhaust pipe (13).
9. scheme for exhaust gas circulation system (10) as claimed in claim 4, which is characterized in that gas nozzle (131) the Xiang Suoshu flue gas leading
Angles are spent in 40-70 in the direction that is blown into that exhaust gas in the direction and the exhaust pipe (13) of high pressure gas is blown into road (13), excellent
60 degree are selected as, 3-7 bars of the pressure of the high pressure gas, preferably 5 bars.
10. a kind of engine (1) with gas fuel, which is characterized in that including as described in any one of claim 1 to 9
Scheme for exhaust gas circulation system (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810324597.3A CN110374765A (en) | 2018-04-12 | 2018-04-12 | Scheme for exhaust gas circulation system and its engine with gas fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810324597.3A CN110374765A (en) | 2018-04-12 | 2018-04-12 | Scheme for exhaust gas circulation system and its engine with gas fuel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110374765A true CN110374765A (en) | 2019-10-25 |
Family
ID=68243519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810324597.3A Pending CN110374765A (en) | 2018-04-12 | 2018-04-12 | Scheme for exhaust gas circulation system and its engine with gas fuel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110374765A (en) |
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| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191025 |
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