JP2017122391A - 内燃機関の排気浄化装置 - Google Patents
内燃機関の排気浄化装置 Download PDFInfo
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- JP2017122391A JP2017122391A JP2016000952A JP2016000952A JP2017122391A JP 2017122391 A JP2017122391 A JP 2017122391A JP 2016000952 A JP2016000952 A JP 2016000952A JP 2016000952 A JP2016000952 A JP 2016000952A JP 2017122391 A JP2017122391 A JP 2017122391A
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- urea water
- exhaust gas
- addition valve
- exhaust
- flow rate
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 16
- 239000003054 catalyst Substances 0.000 claims abstract description 64
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 35
- 238000000746 purification Methods 0.000 claims abstract description 30
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- 230000007423 decrease Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 5
- WTHDKMILWLGDKL-UHFFFAOYSA-N urea;hydrate Chemical compound O.NC(N)=O WTHDKMILWLGDKL-UHFFFAOYSA-N 0.000 abstract description 102
- 239000007921 spray Substances 0.000 abstract description 57
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 40
- 229910021529 ammonia Inorganic materials 0.000 abstract description 20
- 239000007789 gas Substances 0.000 description 84
- 238000002347 injection Methods 0.000 description 24
- 239000007924 injection Substances 0.000 description 24
- 239000002245 particle Substances 0.000 description 19
- 239000006185 dispersion Substances 0.000 description 12
- 230000002829 reductive effect Effects 0.000 description 12
- 230000002093 peripheral effect Effects 0.000 description 8
- 238000001179 sorption measurement Methods 0.000 description 7
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 6
- 239000004202 carbamide Substances 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000006722 reduction reaction Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Images
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
前記NOx触媒の排気上流側に液状の還元剤を添加する添加弁と、
前記添加弁に供給される還元剤を加圧する加圧手段とを備える排気浄化システムに適用され、
排気ガスの流量を取得する取得手段と、
前記取得手段が取得した排気ガスの流量が多くなると還元剤の圧力を低くし、排気ガスの流量が少なくなると還元剤の圧力を高くするよう前記加圧手段を制御する制御手段と、
を備えることを特徴とする。
4NO+4NH3+O2→4N2+6H2O ・・・(式1)
6NO2+8NH3→7N2+3H2O ・・・(式2)
NO+NO2+2NH3→2N2+3H2O ・・・(式3)
2、24 排気通路
7 SCR触媒(NOx触媒)
8 添加弁
18 ポンプ(加圧手段)
20 制御部(内燃機関の排気浄化装置、取得手段、制御手段)
Claims (3)
- 内燃機関の排気通路(2、24)に設けられ還元剤により排気ガス中のNOxを選択的に還元浄化するNOx触媒(7)と、
前記NOx触媒の排気上流側に液状の還元剤を添加する添加弁(8)と、
前記添加弁に供給される還元剤を加圧する加圧手段(18)とを備える排気浄化システム(1)に適用され、
排気ガスの流量を取得する取得手段(20)と、
前記取得手段が取得した排気ガスの流量が多くなると還元剤の圧力を低くし、排気ガスの流量が少なくなると還元剤の圧力を高くするよう前記加圧手段を制御する制御手段(20)と、
を備えることを特徴とする内燃機関の排気浄化装置(20)。 - 前記排気通路は前記NOx触媒よりも排気上流側に曲部(3)を有し、
前記添加弁は前記曲部の曲げ外側に設けられたことを特徴とする請求項1に記載の内燃機関の排気浄化装置。 - 前記添加弁の先端から前記NOx触媒の排気上流側の端面(7a)までの距離が、前記NOx触媒の直径以下であることを特徴とする請求項1又は2に記載の内燃機関の排気浄化装置。
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Publications (2)
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JP2017122391A true JP2017122391A (ja) | 2017-07-13 |
JP6685728B2 JP6685728B2 (ja) | 2020-04-22 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019190415A (ja) * | 2018-04-27 | 2019-10-31 | いすゞ自動車株式会社 | 排気浄化装置および車両 |
WO2020137750A1 (ja) * | 2018-12-28 | 2020-07-02 | 株式会社デンソー | エンジンの触媒反応システム |
WO2020137739A1 (ja) * | 2018-12-28 | 2020-07-02 | 株式会社デンソー | エンジンの排気浄化システム |
JP2020109289A (ja) * | 2018-12-28 | 2020-07-16 | 株式会社デンソー | エンジンの触媒反応システム |
CN114718708A (zh) * | 2022-03-10 | 2022-07-08 | 联合汽车电子有限公司 | 催化器最优转化窗口的修正方法、装置和存储介质 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001059417A (ja) * | 1999-08-20 | 2001-03-06 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
JP2009091976A (ja) * | 2007-10-09 | 2009-04-30 | Denso Corp | 内燃機関の排気浄化装置 |
JP2009097476A (ja) * | 2007-10-19 | 2009-05-07 | Denso Corp | 還元剤の噴射制御装置 |
JP2010053807A (ja) * | 2008-08-29 | 2010-03-11 | Bosch Corp | 還元剤供給制御装置及び内燃機関の排気浄化装置 |
JP2012189048A (ja) * | 2011-03-14 | 2012-10-04 | Toyota Industries Corp | 排気ガス浄化装置 |
JP2013036332A (ja) * | 2011-08-03 | 2013-02-21 | Toyota Motor Corp | 内燃機関の排気浄化システム |
JP2015121199A (ja) * | 2013-12-25 | 2015-07-02 | トヨタ自動車株式会社 | 車載内燃機関の排気浄化装置 |
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2016
- 2016-01-06 JP JP2016000952A patent/JP6685728B2/ja active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001059417A (ja) * | 1999-08-20 | 2001-03-06 | Toyota Motor Corp | 内燃機関の排気浄化装置 |
JP2009091976A (ja) * | 2007-10-09 | 2009-04-30 | Denso Corp | 内燃機関の排気浄化装置 |
JP2009097476A (ja) * | 2007-10-19 | 2009-05-07 | Denso Corp | 還元剤の噴射制御装置 |
JP2010053807A (ja) * | 2008-08-29 | 2010-03-11 | Bosch Corp | 還元剤供給制御装置及び内燃機関の排気浄化装置 |
JP2012189048A (ja) * | 2011-03-14 | 2012-10-04 | Toyota Industries Corp | 排気ガス浄化装置 |
JP2013036332A (ja) * | 2011-08-03 | 2013-02-21 | Toyota Motor Corp | 内燃機関の排気浄化システム |
JP2015121199A (ja) * | 2013-12-25 | 2015-07-02 | トヨタ自動車株式会社 | 車載内燃機関の排気浄化装置 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019190415A (ja) * | 2018-04-27 | 2019-10-31 | いすゞ自動車株式会社 | 排気浄化装置および車両 |
WO2020137750A1 (ja) * | 2018-12-28 | 2020-07-02 | 株式会社デンソー | エンジンの触媒反応システム |
WO2020137739A1 (ja) * | 2018-12-28 | 2020-07-02 | 株式会社デンソー | エンジンの排気浄化システム |
JP2020106011A (ja) * | 2018-12-28 | 2020-07-09 | 株式会社デンソー | エンジンの排気浄化システム |
JP2020109289A (ja) * | 2018-12-28 | 2020-07-16 | 株式会社デンソー | エンジンの触媒反応システム |
CN114718708A (zh) * | 2022-03-10 | 2022-07-08 | 联合汽车电子有限公司 | 催化器最优转化窗口的修正方法、装置和存储介质 |
CN114718708B (zh) * | 2022-03-10 | 2023-08-08 | 联合汽车电子有限公司 | 催化器最优转化窗口的修正方法、装置和存储介质 |
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