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 PDF

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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
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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
Application number
CN201810324597.3A
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Chinese (zh)
Inventor
王瑞光
曹志浩
张恬
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Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to CN201810324597.3A priority Critical patent/CN110374765A/en
Publication of CN110374765A publication Critical patent/CN110374765A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/35Arrangement 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

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  • 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

Scheme for exhaust gas circulation system and its engine with gas fuel
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).
CN201810324597.3A 2018-04-12 2018-04-12 Scheme for exhaust gas circulation system and its engine with gas fuel Pending CN110374765A (en)

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

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Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003065162A (en) * 2001-08-22 2003-03-05 Toyota Motor Corp Egr system
WO2007062682A1 (en) * 2005-11-29 2007-06-07 Renault Trucks Exhaust gas recirculation system and method for cleaning such a system
CN201262123Y (en) * 2008-08-01 2009-06-24 山西佳新能源化工实业有限公司 High compression ratio spark-ignition type engine
JP2011140922A (en) * 2010-01-08 2011-07-21 Aisan Industry Co Ltd Exhaust recirculation device for internal combustion engine
CN102483014A (en) * 2009-07-21 2012-05-30 雷诺卡车公司 Engine arrangement with an improved exhaust heat recovery arrangement
JP2013011227A (en) * 2011-06-29 2013-01-17 Daihatsu Motor Co Ltd Exhaust gas recirculation device
WO2014095329A1 (en) * 2012-12-20 2014-06-26 Avl List Gmbh Method for regenerating an egr cooler
CN104018958A (en) * 2013-03-01 2014-09-03 通用汽车环球科技运作有限责任公司 Exhaust gas recirculation device and motor with same
JP2014185618A (en) * 2013-03-25 2014-10-02 Toyota Motor Corp Exhaust gas recirculation device for internal combustion engine
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CN104373212A (en) * 2013-08-15 2015-02-25 福特环球技术公司 Method for estimating charge air cooler condensation storage and/or release with two intake oxygen sensors
US20150285129A1 (en) * 2014-04-07 2015-10-08 Halla Visteon Climate Control Corp. Charge air cooler internal condensation separator
CN105339624A (en) * 2013-06-26 2016-02-17 丰田自动车株式会社 Exhaust recirculation device for internal combustion engine
CN205078369U (en) * 2015-09-01 2016-03-09 东风朝阳朝柴动力有限公司 Device is put to collection of comdenstion water before water -cooling EGR valve
EP3026236A1 (en) * 2014-11-20 2016-06-01 Mahle International GmbH Air intake system
CN105705761A (en) * 2013-11-11 2016-06-22 博格华纳公司 Condensing EGR-mixer system
CN107061060A (en) * 2017-04-06 2017-08-18 中国第汽车股份有限公司 A kind of integrated gases blender
US20170314517A1 (en) * 2016-04-28 2017-11-02 Hyundai Motor Company Engine system
US20170314516A1 (en) * 2016-04-28 2017-11-02 Hyundai Motor Company Engine system for exhausting condensate water

Patent Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003065162A (en) * 2001-08-22 2003-03-05 Toyota Motor Corp Egr system
WO2007062682A1 (en) * 2005-11-29 2007-06-07 Renault Trucks Exhaust gas recirculation system and method for cleaning such a system
CN201262123Y (en) * 2008-08-01 2009-06-24 山西佳新能源化工实业有限公司 High compression ratio spark-ignition type engine
CN102483014A (en) * 2009-07-21 2012-05-30 雷诺卡车公司 Engine arrangement with an improved exhaust heat recovery arrangement
JP2011140922A (en) * 2010-01-08 2011-07-21 Aisan Industry Co Ltd Exhaust recirculation device for internal combustion engine
JP2013011227A (en) * 2011-06-29 2013-01-17 Daihatsu Motor Co Ltd Exhaust gas recirculation device
WO2014095329A1 (en) * 2012-12-20 2014-06-26 Avl List Gmbh Method for regenerating an egr cooler
CN104018958A (en) * 2013-03-01 2014-09-03 通用汽车环球科技运作有限责任公司 Exhaust gas recirculation device and motor with same
JP2014185618A (en) * 2013-03-25 2014-10-02 Toyota Motor Corp Exhaust gas recirculation device for internal combustion engine
CN105339624A (en) * 2013-06-26 2016-02-17 丰田自动车株式会社 Exhaust recirculation device for internal combustion engine
WO2014206892A1 (en) * 2013-06-28 2014-12-31 Robert Bosch Gmbh Apparatus and method for reducing the pollutants and/or fuel consumption of an internal combustion engine
CN104373212A (en) * 2013-08-15 2015-02-25 福特环球技术公司 Method for estimating charge air cooler condensation storage and/or release with two intake oxygen sensors
CN105705761A (en) * 2013-11-11 2016-06-22 博格华纳公司 Condensing EGR-mixer system
US20150285129A1 (en) * 2014-04-07 2015-10-08 Halla Visteon Climate Control Corp. Charge air cooler internal condensation separator
EP3026236A1 (en) * 2014-11-20 2016-06-01 Mahle International GmbH Air intake system
CN205078369U (en) * 2015-09-01 2016-03-09 东风朝阳朝柴动力有限公司 Device is put to collection of comdenstion water before water -cooling EGR valve
US20170314517A1 (en) * 2016-04-28 2017-11-02 Hyundai Motor Company Engine system
US20170314516A1 (en) * 2016-04-28 2017-11-02 Hyundai Motor Company Engine system for exhausting condensate water
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CN107061060A (en) * 2017-04-06 2017-08-18 中国第汽车股份有限公司 A kind of integrated gases blender

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Application publication date: 20191025

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