CN101460720A - 柴油机催化系统 - Google Patents
柴油机催化系统 Download PDFInfo
- Publication number
- CN101460720A CN101460720A CNA2006800549614A CN200680054961A CN101460720A CN 101460720 A CN101460720 A CN 101460720A CN A2006800549614 A CNA2006800549614 A CN A2006800549614A CN 200680054961 A CN200680054961 A CN 200680054961A CN 101460720 A CN101460720 A CN 101460720A
- Authority
- CN
- China
- Prior art keywords
- catalyst converter
- selective catalytic
- catalytic reduction
- upstream
- reducing agent
- 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
- 239000003054 catalyst Substances 0.000 title claims abstract description 79
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 29
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 28
- 238000010531 catalytic reduction reaction Methods 0.000 claims abstract description 25
- 238000000576 coating method Methods 0.000 claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 21
- 230000006835 compression Effects 0.000 claims abstract description 7
- 238000007906 compression Methods 0.000 claims abstract description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 230000003647 oxidation Effects 0.000 claims description 10
- 238000007254 oxidation reaction Methods 0.000 claims description 10
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000006722 reduction reaction Methods 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- 238000006555 catalytic reaction Methods 0.000 claims description 5
- 210000002421 cell wall Anatomy 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000000446 fuel Substances 0.000 description 18
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 235000019504 cigarettes Nutrition 0.000 description 10
- 238000007599 discharging Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 3
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation catalysts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
- F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/36—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an exhaust flap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/021—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting ammonia NH3
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
- F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0411—Methods of control or diagnosing using a feed-forward control
-
- 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
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
柴油机催化系统以及用于减少压燃式发动机(110)的氮氧化物排放水平的选择性催化还原系统(100),包括位于第一催化器(200)上游的第一还原剂喷射器(210),该第一催化器(200)包括选择性催化还原涂层。第二还原剂喷射器(310)位于第一催化器的下游;以及第二催化器(300)置于第二还原剂喷射器的下游并且包括选择性催化还原涂层。
Description
发明领域
本发明涉及选择性催化还原系统,该系统用于减少压燃式发动机的氮氧化物排放水平,该系统包括位于第一催化器上游的第一还原剂喷射器,该第一催化器包括选择性催化还原涂层。
背景技术
至少从二十世纪七十年代早期起,在内燃机技术中,对排放的关注越来越多。对于SI(火花点燃式)发动机来说,在七十年代中期三元催化剂投放市场后,排放几乎不被认为是个问题。
然而,对于CI(压燃式)发动机,该情况稍加复杂;CI发动机具有氮氧化物(NOx)和微粒(烟灰)的固有高排放水平。由于在CI发动机里发动机燃烧的本质,即大量的空气被导入汽缸,于是空气被压缩。随后,随发动机负荷的函数变化的一定量燃料被喷入该压缩空气中。喷射燃料将由于空气压缩所引起的高温而自燃。
喷射燃料以扩散模式燃烧,即,燃烧速度或多或少地由喷射燃料和压缩空气之间的混合比率所控制。烟灰将形成在富燃料带并且NOx将形成在燃烧带中,该燃烧带具有高温并且留有足够的氧以形成NOx。
关于减少CI发动机排气中的NOx的排气后处理的一个阻碍是氧的存在;如之前的暗示,大量空气在燃料喷射以前被导入汽缸中。因此,与完全燃烧所有喷射燃料所需的空气量相比,汽缸中总有过剩空气。排气中的剩余空气使得使用标准三元催化剂来减少NOx排放成为不可能。
烟灰(或微粒)也是CI发动机的主要问题;如上述,烟灰形成于富燃料燃烧带。形成小燃料滴的高燃料喷射压力能显著减少烟灰形成,但是在能接受多高的喷射压力上存在着设计限制。
有一些方法来减少CI发动机中的NOx形成;最常见的方法是延迟喷射正时。通过延迟喷射正时,能减少最大燃烧温度,这将依次减少NOx形成。然而,该NOx的减少伴随着一些代价,即烟灰形成和燃料消耗都随着延迟喷射正时而增加。
一种减少NOx排放的有效方法是使用SCR(选择性催化还原)排放后处理系统。常见的SCR系统包括涂有如沸石、V氧化物(如V2O5)、铜沸石、铁沸石或者适合SCR的其他已知材料的基质。不同于SI发动机的三元催化剂,SCR系统无法在仅由排气组成的环境中工作;一些附加的试剂必须加入排气中,如还原剂。常见的此种试剂是尿素,即(NH2)2CO,还有碳氢化合物或氢。
SCR催化剂的效率,与行驶周期(driving cycle)有关,限于大约65—80%,并且其功能由于烟灰的存在而严重削弱。
过滤器被用作烟灰散播的排气后处理;然而此种过滤器随发动机负荷情况变化而需要经常再生。该再生主要指排气温度通过任何方式增加,例如,通过极端延迟的燃料喷射、二次喷射、通过入口空气节流、或通过任何其他适合的方式。该增加的排气温度使过滤器捕集的烟灰微粒“燃尽”,也就是与氧一起在排气中反应以形成二氧化碳和水。然而,每一次再生后果导致了燃料经济性损失。
现在和未来涉及NOx排放的法规实际上将使联合延迟燃料喷射、SCR系统和烟灰过滤器成为必须。这导致“恶性循环”,最终导致高燃料消耗,这又进一步导致温室效应增加和糟糕的运行经济性。
如果该NOx排气后处理可以改善,则该恶性循环应该被打破;该燃料喷射正时可以被设置成设定的给定最小燃料经济性,这将跟着减少烟灰形成,进一步又将使NOx的减少更容易。
所以本发明的目的是提供能够达到高的NOx转化因数的排气后处理系统。
发明内容
本发明通过位于第一催化器下游的第二还原剂喷射器和置于第二还原剂喷射器下游的第二催化器来解决了以上或其他问题,所述第二催化器包括选择性催化还原涂层。
在本发明的一个实施例中,第一催化器包括过滤器功能元件(filterfunction)以捕集由压燃燃烧形成的微粒。在此实施例中,第一催化器包括多个细长单元,这些单元分别交替地具有封闭和开放的顶端和底端,其中排气气流被促使通过组成该单元的单元壁,并且其中选择性催化还原涂层涂在壁的单侧或双侧。
为了进一步给根据本发明的系统提供氧化能力,氧化催化涂层被涂在单元壁的上游侧。
为精调由还原剂喷射器喷射的还原剂的量,感测排气中的氮氧化物和/或氨的存在的传感器可被布置在排气气流中。精调的一个实施例包括分别将传感器放置在所述过滤器的下游和第二催化器的下游。另一种实施例仅包括一个NOx或NH3传感器,其置于该第二SCR催化器的下游。
附图说明
接下来,将参考以下的附图对本发明进行描述,图中:
图1是根据本发明的催化器系统的示意图;
图2a是可用来作为催化器的过滤器介质的一部分的俯视图;和
图2b是图2a中过滤器介质的截面侧视图。
具体实施方式
在图1中示出了根据本发明的催化器系统100的示意图。该催化器系统100连接到发动机110的排气系统并且包括第一催化器200、第二催化器300和排气压力调节器(EPG)400,第一催化器200的设计将在后面描述。此外,第一还原剂喷射器210和第二还原剂喷射器310分别安装在第一催化器200的上游和第二催化器300的上游。还原剂可以是如尿素、碳氢化合物、氢或其他带有还原特性的合适种类。NOx-和/或NH3传感器220、320分别安装在该第一催化器200和第二催化器300的下游。作为选择,第一NOx-和/或NH3传感器220也可以省略掉。
催化器200和300都称为SCR(选择性催化还原)-催化器,其功能在本领域技术人员中众所周知,并且在背景技术部分已做简要描述。然而催化器200还进一步提供过滤器功能元件以便过滤从CI发动机中散发的微粒。此催化器基本上设计成微粒过滤器,其涂有SCR涂层以便得到双重功能,即同时为过滤器和SCR催化器。该SCR涂层可以设置在过滤器的上游侧上或在过滤器的下游侧上或同时在两侧上,其可以是其它任何作为SCR催化器的合适涂层。
在图2a中,以俯视图方式显示了构成第一催化器200的涂有SCR的过滤器介质250的一部分;图2b中,以截面侧视图方式显示了过滤器介质250的同一部分。过滤器介质250包括若干伸长的过滤器单元260,每个过滤器单元由4个壁260a、b、c和d、以及上游表面265或下游表面270所限定;每个其他单元将设置有上游表面,并且其相邻单元将设置有下游表面。
壁260a、b、c和d由多孔材料制成,其孔的尺寸足够小以便捕集发动机燃烧时散发的微粒。过滤器的功能基本上是使未过滤的排气进入具有开口上游端的过滤器单元,并且通过该单元的壁进入具有开口下游端的单元,因此能从下游开口端离开过滤器介质。随后,面对具有开口上游端的单元的壁260a、b、c和d的表面被称为“上游壁表面”,而其他壁表面被称为“下游壁表面”。如上描述的过滤器系统常被称为“穿壁流动”过滤器。
根据本发明,单元的上游壁表面和下游壁表面的任意一个或全部涂有SCR涂层;这能保证该第一催化器的双重功能,即过滤微粒和使NOx和还原剂之间产生SCR反应以便减少NOx排放的功能。如此的双重功能,当然能产生经济方面的作用,然而还有其它的益处,即SCR反应有助于将附在过滤器上的微粒燃烧完,这能延长过滤器再生的周期,或最好的情况,无需再生。
还有一种在壁260a、b、c和d的上下游侧上使用不同的SCR涂层的可能性;不同的SCR涂层具有不同温度区域,在不同温度区域中它们具有其最佳性能。因此,可以获得一种具有广泛温度范围的催化器。
在任何环境下,如果需要调节排气温度,则这能够通过排气压力调节器400获得;如本领域技术人员众所周知的,可通过使发动机工作在高排气压力下而提高排气温度。然而,从燃料经济性角度看,通常使发动机在尽可能低的排气压力下工作最经济。
在本发明的另一个实施例中,上游壁表面或下游壁表面的任意一个涂有氧化催化涂层。该涂层将在排气中使燃料的可能成分,即碳氢化合物氧化,氧化作用将增加排气温度并减少碳氢化合物排放到环境中。根据本发明,在未涂氧化催化涂层的壁表面上涂SCR涂层。氧化催化涂层的例子包括不同贵金属,如铂(Pt)、钯(Pd)、铑(Rh)或铱(Ir),基金属氧化物或它们的混合物。
为燃烧完粘在过滤器孔中的微粒,有必要在一定时期内提高排气温度。这可以通过一些方法实现,如通过延时喷射燃料、使用二次喷射、通过吸气节流、可变阀致动、排气再循环、或本领域技术人员众所周知的其他方法。
使用氧化催化剂能通过向氧化催化剂上游的排气气流中喷射燃料来提高排气温度;该燃料在氧化催化剂作用下催化地燃烧,因此提高了氧化催化剂下游的排气温度。为在催化器200中获得燃烧完微粒的最大效果,催化涂层优选涂在单元壁260a、b、c和d的上游表面。
当然,也可使用布置于第一催化器200上游的分离氧化催化剂。使用清理催化剂功能的目的是限制位于催化器300下游的喷射还原剂的发散,该功能的作用在任何SCR系统中都常用,因此未在附图中显示。第一催化器200还可包括一个过滤器衬底,其过滤效率小于穿壁流动过滤器。
第二催化器300与第一催化器200相似,但优选采用更传统的催化器设计。
在本发明的又一个实施例中,第一催化器200和第二催化器300都采用传统设计。在此情况下,微粒过滤器(未显示)被设置在两个催化器的上游。该实施例中的微粒过滤器必须采用上述提到的任意方法进行再生。
为控制喷射到排气中的还原剂量,两个还原剂喷射器210、310由控制器C控制。该控制器C进一步从NOx形成模型中获得输入,该形成模型建立在如发动机负载、发动机速度、进口空气温度、充气压力(charge pressure)和其它NOx形成需要的参数的基础上。该NOx形成模型提供了对还原剂量大致的估计以在第一催化器200和第二催化器300中获得满意的NOx转化。
为获得对喷射到排气中的还原剂数量的精确控制,特别是当还原剂为尿素或氨时,来自NOx/NH3传感器220、320的信息可用于精确调整喷射到排气中的还原剂量。在本发明的一个实施例中,同时采用NOx和NH3传感器;这提高了安全等级,因为能同时监控NOx的水平和NH3的水平。如果例如NOx传感器提供排气中NOx含量过高的值,这通常将使控制器C喷射过多大量的还原剂,则这可以通过提供NH3传感器来避免,在此种情况下将出现排气中存在大量NH3(来源于喷射到排气中的还原剂)的信号,因此使控制器C能够修正喷射到排气中的还原剂量。显然,如果来自NOx和NH3传感器的值不正确,控制器C必须通知运行人员,或者在机载诊断盒(未显示)中保存该故障显示以便随后在维修站中读出。
以上显示了-CI发动机的NOx还原系统的示例性实施例。通过该系统的效果,能使CI发动机运行在燃料效率和烟灰低排放的最优模式中,因此根据本发明的催化器系统中在该模式下产生的NOx排放将有效的减少。
以上示出了本发明的示例性实施例;如可被本领域技术人员所知,从所述实施例可做许多变形。
Claims (9)
1.一种选择性催化还原系统(100),用于减少压燃式发动机(110)的氮氧化物排放水平,该系统包括:位于第一催化器(200)上游的第一还原剂喷射器(210),所述第一催化器(200)包括选择性催化还原涂层,其特征在于
位于所述第一催化器(200)下游的第二还原剂喷射器(310);和
置于所述第二还原剂喷射器(310)下游的第二催化器(300),并且该第二催化器(300)包括选择性催化还原涂层。
2.如权利要求1所述的选择性催化还原系统(100),其中所述第一催化器(200)包括过滤器功能元件,以捕集由压燃燃烧形成的微粒。
3.如权利要求2所述的选择性催化还原系统(100),其中所述第一催化器(200)包括多个细长单元(260),该多个细长单元分别交替地具有封闭和开放的顶端和底端,其中气流被促使通过构成所述单元的单元壁(260a、b、c、d),并且其中所述选择性催化还原涂层涂在所述壁(260a、b、c、d)单侧或双侧上。
4.如前述权利要求中任一项所述的选择性催化还原系统(100),其中氧化催化涂层涂在所述单元壁(260a、b、c、d)的上游侧。
5.如前述权利要求中任一项所述的选择性催化还原系统(100),进一步包括感测排气中氮氧化物和/或氨的存在的传感器(210、310)。
6.如权利要求5所述的选择性催化还原系统(100),其中所述传感器(210、310)分别置于所述第一催化器(200)的下游和所述第二催化器(300)的下游。
7.如前述权利要求中任一项所述的选择性催化还原系统(100),其中装置(400)位于包括在所述选择性催化还原系统(100)中的部件(210、200、300、310)中任一个的上游,所述装置布置为操控所述选择性催化还原系统(100)的温度,以及由此的所述选择性催化还原系统(100)的性能窗。
8.如权利要求7所述的选择性催化还原系统(100),其中所述装置(400)是排气压力调节器。
9.一种用于减少压燃式发动机(110)的氮氧化物排放的方法,其中的排气系统包括:
位于第一催化器(200)上游的第一还原剂喷射器(210),该第一催化器(200)包括选择性催化还原涂层,
位于所述第一催化器(200)下游的第二还原剂喷射器(310);和
置于所述第二还原剂喷射器(310)下游的第二催化器(300),并且该第二催化器包括选择性催化还原涂层,
其中所述方法的特征在于如下步骤:
a.预测在所述第一催化器(200)上游的排气气流中的氮氧化物含量,
b.基于所述预测,计算要喷射到所述第一催化器上游的还原剂的量,
c.喷射此预测的所述第一催化器上游的还原剂的量,
d.测量所述第一催化器(200)下游和所述第二催化器(300)上游的排气气流中的剩余氮氧化物水平,
e.相应地调节所喷射的还原剂的量,
f.基于所述第二催化器上游的所述剩余氮氧化物水平,预测喷射到所述第二催化器上游的还原剂量,
g.测量所述第二催化器(200)下游的氮氧化物水平,和
h.相应地调节所述第二催化器(200)上游所喷射的还原剂的量。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/SE2006/000703 WO2007145548A1 (en) | 2006-06-13 | 2006-06-13 | Diesel catalyst system |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201310256776.5A Division CN103527289A (zh) | 2006-06-13 | 2006-06-13 | 选择性催化还原系统和减少发动机氮氧化物排放的方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN101460720A true CN101460720A (zh) | 2009-06-17 |
Family
ID=38831972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNA2006800549614A Pending CN101460720A (zh) | 2006-06-13 | 2006-06-13 | 柴油机催化系统 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8601796B2 (zh) |
EP (1) | EP2032812B1 (zh) |
JP (1) | JP2009540212A (zh) |
CN (1) | CN101460720A (zh) |
BR (1) | BRPI0621825A2 (zh) |
ES (1) | ES2551703T3 (zh) |
WO (1) | WO2007145548A1 (zh) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101979846A (zh) * | 2009-06-17 | 2011-02-23 | 通用汽车环球科技运作公司 | 包括稀NOx捕集器和二元催化剂的排气处理系统及其使用方法 |
CN102444450A (zh) * | 2010-10-13 | 2012-05-09 | 福特环球技术公司 | 用于内燃机的排气系统 |
CN104712407A (zh) * | 2013-12-11 | 2015-06-17 | 卡特彼勒公司 | 用于流体采样的系统和方法 |
CN108762334A (zh) * | 2018-04-17 | 2018-11-06 | 潍柴动力股份有限公司 | 用于doc下游温度的控制方法及控制装置 |
Families Citing this family (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008075543A (ja) * | 2006-09-21 | 2008-04-03 | Hino Motors Ltd | エンジンの排ガス浄化装置 |
US7966812B2 (en) * | 2007-08-29 | 2011-06-28 | Ford Global Technologies, Llc | Multi-stage regeneration of particulate filter |
FR2926592B1 (fr) * | 2008-01-18 | 2012-07-13 | Peugeot Citroen Automobiles Sa | Procede d'injection d'agent reducteur dans une ligne d'echappement |
DE102008059773A1 (de) * | 2008-12-01 | 2010-06-02 | Volkswagen Ag | Verfahren zum Betreiben einer SCR-Katalysatoreinrichtung |
PL2382031T5 (pl) | 2008-12-24 | 2023-04-11 | Basf Corporation | Układy i sposoby obróbki spalin z katalizowanym SCR filtrem i katalizatorem SCR za nim |
US8448424B2 (en) * | 2009-01-16 | 2013-05-28 | Ford Global Technologies, Llc. | Emission control system with an integrated particulate filter and selective catalytic reduction unit |
DE102009022882A1 (de) * | 2009-05-27 | 2010-12-02 | Bayerische Motoren Werke Aktiengesellschaft | Sensor zum Erfassen der Menge eines Reduktionsmittels und der Menge eines Schadstoffs in einem Abgas |
US20110064632A1 (en) * | 2009-09-14 | 2011-03-17 | Ford Global Technologies, Llc | Staged Catalyst System and Method of Using the Same |
GB201003784D0 (en) | 2010-03-08 | 2010-04-21 | Johnson Matthey Plc | Improvement in control OPF emissions |
DE102010038176B4 (de) * | 2010-10-14 | 2014-02-27 | Ford Global Technologies, Llc. | Verfahren zum Messen der Qualität der Ammoniakeinspritzung für ein Nachbehandlungssystem eines Kraftfahrzeugs |
US9234447B2 (en) * | 2010-12-10 | 2016-01-12 | GM Global Technology Operations LLC | System and method for determining selective catalytic reduction dosing system performance using an ammonia sensor |
US20130213013A1 (en) * | 2011-01-14 | 2013-08-22 | Cummins Ip, Inc. | Exhaust gas sensor module |
EP2663751B1 (en) * | 2011-01-14 | 2018-09-26 | Cummins IP, Inc. | Exhaust gas sensor module |
US8756913B2 (en) * | 2011-01-14 | 2014-06-24 | Cummins Filtration Ip, Inc. | Exhaust gas sensor module |
HRP20211668T1 (hr) * | 2011-11-22 | 2022-02-18 | Deutz Aktiengesellschaft | Postupak i uređaj za čišćenje ispušnih plinova dizel motora |
DE102011087525A1 (de) * | 2011-12-01 | 2013-06-06 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Abgasanlage einer Brennkraftmaschine |
EP2795076B1 (en) * | 2011-12-23 | 2016-11-16 | Volvo Lastvagnar AB | Exhaust aftertreatment system and method for operating the system |
EA027298B1 (ru) * | 2012-03-02 | 2017-07-31 | Хальдор Топсёэ А/С | Способ и система для удаления вредных соединений из выхлопного газа двигателя |
WO2013134539A1 (en) * | 2012-03-07 | 2013-09-12 | Cummins Inc. | Method and algorithm for performing an nh3 sensor rationality diagnostic |
US8997461B2 (en) | 2012-05-21 | 2015-04-07 | Cummins Emission Solutions Inc. | Aftertreatment system having two SCR catalysts |
WO2014044318A1 (en) * | 2012-09-21 | 2014-03-27 | Haldor Topsøe A/S | Method and system for the removal of noxious compounds from engine exhaust gas |
US9482154B2 (en) | 2012-12-05 | 2016-11-01 | Cummins Cal Pacific, Llc | Exhaust gas collector for an exhaust aftertreatment system |
JP5983438B2 (ja) * | 2013-01-31 | 2016-08-31 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
US9192892B2 (en) * | 2014-01-16 | 2015-11-24 | Cummins Emission Solutions, Inc. | Selective dosing module control system |
DE102015000955B4 (de) | 2014-01-20 | 2025-01-23 | Cummins Inc. | Systeme und Verfahren zur Minderung von NOx- und HC-Emissionen |
US9512761B2 (en) | 2014-02-28 | 2016-12-06 | Cummins Inc. | Systems and methods for NOx reduction and aftertreatment control using passive NOx adsorption |
US9597636B2 (en) * | 2014-08-07 | 2017-03-21 | Johnson Matthey Public Limited Company | Zoned catalyst for treating exhaust gas |
JP6278002B2 (ja) * | 2015-06-08 | 2018-02-14 | トヨタ自動車株式会社 | 排気浄化装置の故障診断装置 |
WO2017034470A1 (en) | 2015-08-27 | 2017-03-02 | Scania Cv Ab | Method and exhaust treatment system for treatment of an exhaust gas stream |
SE539134C2 (sv) | 2015-08-27 | 2017-04-11 | Scania Cv Ab | Avgasbehandlingssystem och förfarande för behandling av en avgasström |
SE539130C2 (sv) | 2015-08-27 | 2017-04-11 | Scania Cv Ab | Förfarande och avgasbehandlingssystem för behandling av en avgasström |
SE539131C2 (sv) | 2015-08-27 | 2017-04-11 | Scania Cv Ab | Förfarande och avgasbehandlingssystem för behandling av en avgasström |
SE539133C2 (sv) | 2015-08-27 | 2017-04-11 | Scania Cv Ab | Avgasbehandlingssystem och förfarande för behandling av en avgasström |
SE539129C2 (en) | 2015-08-27 | 2017-04-11 | Scania Cv Ab | Process and system for processing a single stream combustion exhaust stream |
US10927740B2 (en) | 2015-09-30 | 2021-02-23 | Deere & Company | System for regulating exhaust emissions |
US9616385B1 (en) * | 2015-09-30 | 2017-04-11 | Deere & Company | System and method for regulating exhaust emissions |
US10018091B2 (en) | 2016-11-17 | 2018-07-10 | Ford Global Technologies, Llc | Exhaust system |
DE102017220533A1 (de) * | 2017-11-17 | 2019-05-23 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Reagenzmittel-Dosiersystems, Vorrichtung und Leitungsnetz zur Durchführung des Verfahrens |
GB2586752B (en) | 2018-04-02 | 2022-07-27 | Cummins Emission Solutions Inc | Aftertreatment system including noise reducing components |
US11486289B2 (en) | 2018-07-03 | 2022-11-01 | Cummins Emission Solutions Inc. | Body mixing decomposition reactor |
CN109569293A (zh) * | 2018-12-10 | 2019-04-05 | 中国神华能源股份有限公司 | 一种烟气脱硝装置及烟气脱硝方法 |
US11187127B2 (en) * | 2019-06-28 | 2021-11-30 | Deere & Company | Exhaust gas treatment system and method with four-way catalyzed filter element |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4214183A1 (de) | 1992-04-30 | 1993-06-09 | Daimler Benz Ag | Abgasnachbehandlungseinrichtung fuer verbrennungsmotoren, mit einem reduktionskatalysator zur selektiven katalytischen reduktion von stickoxiden aus abgasen, insbesondere aus abgasen von kraftfahrzeugdieselmotoren |
DE19859003A1 (de) * | 1998-12-21 | 2000-06-29 | Bosch Gmbh Robert | Abgasreinigung zum Reduzieren von Stickoxiden aus sauerstoffhaltigen Abgasen einer Brennkraftmaschine |
US6182443B1 (en) | 1999-02-09 | 2001-02-06 | Ford Global Technologies, Inc. | Method for converting exhaust gases from a diesel engine using nitrogen oxide absorbent |
DE19918756A1 (de) * | 1999-04-24 | 2000-10-26 | Volkswagen Ag | Anordnung zur Reinigung eines Abgases einer Verbrennungsmaschine und Verfahren zum Betrieb einer solchen Anordnung |
JP4292633B2 (ja) * | 1999-07-16 | 2009-07-08 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP4277374B2 (ja) * | 1999-07-22 | 2009-06-10 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
GB9919013D0 (en) | 1999-08-13 | 1999-10-13 | Johnson Matthey Plc | Reactor |
JP2001329829A (ja) * | 2000-05-19 | 2001-11-30 | Denso Corp | ディーゼルパティキュレートフィルタ |
JP4889873B2 (ja) * | 2000-09-08 | 2012-03-07 | 日産自動車株式会社 | 排気ガス浄化システム、これに用いる排気ガス浄化触媒及び排気浄化方法 |
DE10128414A1 (de) * | 2001-06-12 | 2002-12-19 | Daimler Chrysler Ag | Abgasreinigungsanlage mit Reduktionsmittelversorgung |
EP1286027A1 (de) | 2001-08-14 | 2003-02-26 | Siemens Aktiengesellschaft | Katalysatorsystem, Verwendung eines Katalysatorsystems und Verfahren zum Betrieb eines Katalysatorsystems |
JP3599012B2 (ja) * | 2001-10-01 | 2004-12-08 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
JP3876705B2 (ja) * | 2001-12-13 | 2007-02-07 | いすゞ自動車株式会社 | ディーゼルエンジンの排気ガス浄化システム |
EP1458960B1 (en) * | 2001-12-20 | 2011-02-09 | Johnson Matthey Public Limited Company | Improvements in selective catalytic reduction |
US20030200742A1 (en) * | 2002-04-24 | 2003-10-30 | Smaling Rudolf M. | Apparatus and method for regenerating a particulate filter of an exhaust system of an internal combustion engine |
JP4032902B2 (ja) * | 2002-09-25 | 2008-01-16 | トヨタ自動車株式会社 | 排気浄化用の基材、および、その製造方法 |
DE10254764A1 (de) * | 2002-11-22 | 2004-06-03 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Abgasanlage |
US7229597B2 (en) * | 2003-08-05 | 2007-06-12 | Basfd Catalysts Llc | Catalyzed SCR filter and emission treatment system |
US6996975B2 (en) * | 2004-06-25 | 2006-02-14 | Eaton Corporation | Multistage reductant injection strategy for slipless, high efficiency selective catalytic reduction |
US20070199320A1 (en) * | 2006-02-28 | 2007-08-30 | Yager James H | Flexible engine cooling and exhaust gas temperature controls for diesel after-treatment regeneration and engine performance improvement |
-
2006
- 2006-06-13 ES ES06747896.6T patent/ES2551703T3/es active Active
- 2006-06-13 WO PCT/SE2006/000703 patent/WO2007145548A1/en active Application Filing
- 2006-06-13 CN CNA2006800549614A patent/CN101460720A/zh active Pending
- 2006-06-13 EP EP06747896.6A patent/EP2032812B1/en active Active
- 2006-06-13 BR BRPI0621825-3A patent/BRPI0621825A2/pt not_active IP Right Cessation
- 2006-06-13 US US12/304,758 patent/US8601796B2/en active Active
- 2006-06-13 JP JP2009515331A patent/JP2009540212A/ja active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101979846A (zh) * | 2009-06-17 | 2011-02-23 | 通用汽车环球科技运作公司 | 包括稀NOx捕集器和二元催化剂的排气处理系统及其使用方法 |
US8635855B2 (en) | 2009-06-17 | 2014-01-28 | GM Global Technology Operations LLC | Exhaust gas treatment system including a lean NOx trap and two-way catalyst and method of using the same |
CN102444450A (zh) * | 2010-10-13 | 2012-05-09 | 福特环球技术公司 | 用于内燃机的排气系统 |
CN102444450B (zh) * | 2010-10-13 | 2016-03-09 | 福特环球技术公司 | 用于内燃机的排气系统 |
CN104712407A (zh) * | 2013-12-11 | 2015-06-17 | 卡特彼勒公司 | 用于流体采样的系统和方法 |
CN108762334A (zh) * | 2018-04-17 | 2018-11-06 | 潍柴动力股份有限公司 | 用于doc下游温度的控制方法及控制装置 |
CN108762334B (zh) * | 2018-04-17 | 2020-09-29 | 潍柴动力股份有限公司 | 用于doc下游温度的控制方法及控制装置 |
Also Published As
Publication number | Publication date |
---|---|
JP2009540212A (ja) | 2009-11-19 |
US20100064662A1 (en) | 2010-03-18 |
BRPI0621825A2 (pt) | 2011-12-20 |
ES2551703T3 (es) | 2015-11-23 |
EP2032812A1 (en) | 2009-03-11 |
EP2032812B1 (en) | 2015-07-22 |
WO2007145548A1 (en) | 2007-12-21 |
EP2032812A4 (en) | 2010-11-17 |
US8601796B2 (en) | 2013-12-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101460720A (zh) | 柴油机催化系统 | |
CN103527289A (zh) | 选择性催化还原系统和减少发动机氮氧化物排放的方法 | |
US6745560B2 (en) | Adsorber aftertreatment system having dual soot filters | |
CN101845978B (zh) | 具有四效和尿素scr催化器的排气处理系统及使用方法 | |
CN101149011B (zh) | 将还原剂注入废气馈送流的设备 | |
US7117667B2 (en) | NOx adsorber aftertreatment system for internal combustion engines | |
CN101283169B (zh) | 柴油机的排气净化装置 | |
CN102345486B (zh) | 机动车辆发动机系统 | |
US7833495B2 (en) | Exhaust treatment device facilitating through-wall flow | |
US10240498B2 (en) | Device and method for regenerating a particulate filter arranged in the exhaust section of an internal combustion engine | |
CN101313132B (zh) | 废气净化系统的再生控制方法以及废气净化系统 | |
EP2678095B1 (en) | Exhaust system including nox reduction catalyst and egr circuit | |
CN102027214B (zh) | 废气净化系统及其控制方法 | |
CN104653258B (zh) | 贫NOx阱脱硫的系统和方法 | |
US6820414B2 (en) | Adsorber aftertreatment system having downstream soot filter | |
CN102844533A (zh) | 发动机及废气后处理控制 | |
CN101617109A (zh) | 排气后处理系统(eats) | |
US6735940B2 (en) | Adsorber aftertreatment system having dual adsorbers | |
US20130000277A1 (en) | System for reducing engine emissions and backpressure using parallel emission reduction equipment | |
CN103362610A (zh) | 与废气后处理装置结合的应用方法 | |
US20120144802A1 (en) | Exhaust system having doc regeneration strategy | |
CN107060967A (zh) | 用于控制联接至排气后处理系统的内燃机的方法和设备 | |
GB2504359A (en) | Method of controlling an engine having an exhaust gas recirculation apparatus and an exhaust gas treatment apparatus | |
US20100281851A1 (en) | Exhaust gas emissions reactor and method of treating exhaust gas | |
CN112739891B (zh) | 通过再生策略改善废气处理的方法和汽油发动机总成 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C12 | Rejection of a patent application after its publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20090617 |