JP2020109289A5 - - Google Patents
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- JP2020109289A5 JP2020109289A5 JP2019179747A JP2019179747A JP2020109289A5 JP 2020109289 A5 JP2020109289 A5 JP 2020109289A5 JP 2019179747 A JP2019179747 A JP 2019179747A JP 2019179747 A JP2019179747 A JP 2019179747A JP 2020109289 A5 JP2020109289 A5 JP 2020109289A5
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- Prior art keywords
- injection
- particle size
- spray
- catalyst
- control unit
- Prior art date
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- 238000002347 injection Methods 0.000 claims description 59
- 239000007924 injection Substances 0.000 claims description 59
- 239000007921 spray Substances 0.000 claims description 38
- 239000003054 catalyst Substances 0.000 claims description 34
- 239000002245 particle Substances 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 12
- 238000006555 catalytic reaction Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000889 atomisation Methods 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000009834 vaporization Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 4
- 239000000446 fuel Substances 0.000 claims 2
- OZAIFHULBGXAKX-UHFFFAOYSA-N precursor Substances N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims 1
- 239000003638 reducing agent Substances 0.000 claims 1
Description
本発明のエンジン（９０）の触媒反応システムは、エンジンの排気系通路（９１、１０１）に設けられる触媒（１１、５１）と、触媒の上流側に設けられる攪拌部（１２）と、所定の液体を噴霧として攪拌部に向けて噴射する噴射装置（１３、５３）と、攪拌部の下流側における噴霧の微粒化または気化が進むように、触媒が設けられる触媒設置通路部の排気の状態に応じて噴射装置の噴射粒径および噴射速度の一方または両方を制御する噴霧制御部（２４、３４、４４、６４、７４、８４）と、を備える。
噴霧制御部（３４、４４）は、噴射粒径および噴射速度の制御範囲を、噴射粒径が比較的大きくなる第１制御範囲（Ａ１）と噴射粒径が比較的小さくなる第２制御範囲（Ａ２）との間で触媒設置通路部の排気流量に応じて切り替える。
本発明の第１の態様では、噴霧制御部は、触媒設置通路部の排気流量が閾値（Ｑｄ）以上である場合に第２制御範囲を用いる。
本発明の第２の態様では、噴霧制御部（４４）は、噴射装置の噴射粒径と噴射速度とを互いに独立して制御可能である。また噴霧制御部は、第１制御範囲および第２制御範囲のうち、触媒の入口における噴射装置からの噴射物の目標均質度をより低エネルギで達成する方を用いる。
本発明の第３の態様では、噴霧制御部（４４）は、噴射装置の噴射粒径と噴射速度とを互いに独立して制御可能である。また噴霧制御部は、触媒の入口における液体の目標均質度を達成可能な噴射粒径と噴射速度との組合せが複数あって、それらの組合せ同士で必要エネルギの差が所定値以内である場合、噴霧粒径がより小さくなる組合せを採用する。
The catalytic reaction system of the engine (90) of the present invention includes a catalyst (11, 51) provided in the exhaust system passages (91, 101) of the engine, a stirring unit (12) provided on the upstream side of the catalyst, and predetermined. Injecting devices (13, 53) that inject liquid as spray toward the stirring section, and the exhaust state of the catalyst installation passage section where the catalyst is provided so that the atomization or vaporization of the spray on the downstream side of the stirring section proceeds. It is provided with a spray control unit (24, 34, 44, 64, 74, 84) that controls one or both of the injection particle size and the injection speed of the injection device accordingly.
The spray control unit (34, 44) sets the control range of the injection particle size and the injection speed in the first control range (A1) in which the injection particle size is relatively large and the second control range (A1) in which the injection particle size is relatively small. Switch between A2) and the catalyst installation passage according to the exhaust flow rate.
In the first aspect of the present invention, the spray control unit uses the second control range when the exhaust flow rate of the catalyst installation passage unit is equal to or higher than the threshold value (Qd).
In the second aspect of the present invention, the spray control unit (44) can control the injection particle size and the injection speed of the injection device independently of each other. Further, the spray control unit uses the one of the first control range and the second control range that achieves the target homogeneity of the injection material from the injection device at the inlet of the catalyst with lower energy.
In the third aspect of the present invention, the spray control unit (44) can control the injection particle size and the injection speed of the injection device independently of each other. Further, when the spray control unit has a plurality of combinations of injection particle size and injection speed capable of achieving the target homogeneity of the liquid at the inlet of the catalyst, and the difference in required energy between these combinations is within a predetermined value, Use a combination with a smaller spray particle size.
Claims (12)
前記触媒の上流側に設けられる攪拌部（１２）と、
所定の液体を噴霧として前記攪拌部に向けて噴射する噴射装置（１３、５３）と、
前記攪拌部の下流側における噴霧の微粒化または気化が進むように、前記触媒が設けられる触媒設置通路部の排気の状態に応じて前記噴射装置の噴射粒径および噴射速度の一方または両方を制御する噴霧制御部（２４、３４、４４、６４、７４、８４）と、
を備え、
前記噴霧制御部（３４、４４）は、噴射粒径および噴射速度の制御範囲を、噴射粒径が比較的大きくなる第１制御範囲（Ａ１）と噴射粒径が比較的小さくなる第２制御範囲（Ａ２）との間で前記触媒設置通路部の排気流量に応じて切り替え、
前記噴霧制御部は、前記触媒設置通路部の排気流量が閾値（Ｑｄ）以上である場合に前記第２制御範囲を用いるエンジンの触媒反応システム。 The catalysts (11, 51) provided in the exhaust system passages (91, 101) of the engine (90) and
A stirring unit (12) provided on the upstream side of the catalyst and
An injection device (13, 53) that injects a predetermined liquid as a spray toward the stirring unit.
One or both of the injection particle size and the injection speed of the injection device are controlled according to the exhaust state of the catalyst installation passage where the catalyst is provided so that the atomization or vaporization of the spray on the downstream side of the stirring unit proceeds. Spray control unit (24, 34, 44, 64, 74, 84) and
Equipped with a,
The spray control unit (34, 44) sets the control range of the injection particle size and the injection speed in the first control range (A1) in which the injection particle size is relatively large and the second control range in which the injection particle size is relatively small. Switch between (A2) and the catalyst installation passage according to the exhaust flow rate.
The spray control unit is an engine catalyst reaction system that uses the second control range when the exhaust flow rate of the catalyst installation passage unit is equal to or higher than a threshold value (Qd) .
前記噴霧制御部は、前記温度取得部が取得した温度が低いほど前記閾値が小さくなるように補正する請求項１〜３のいずれか一項に記載のエンジンの触媒反応システム。 A temperature acquisition unit (34) for acquiring the measured temperature or the estimated temperature of the stirring unit is further provided.
The catalytic reaction system for an engine according to any one of claims 1 to 3 , wherein the spray control unit corrects so that the lower the temperature acquired by the temperature acquisition unit, the smaller the threshold value.
前記噴霧制御部は、前記温度取得部が取得した温度が低いほど噴霧粒径を小さくする請求項１〜３のいずれか一項に記載のエンジンの触媒反応システム。 A temperature acquisition unit for acquiring the measured temperature or the estimated temperature of the stirring unit is further provided.
The catalytic reaction system for an engine according to any one of claims 1 to 3 , wherein the spray control unit reduces the spray particle size as the temperature acquired by the temperature acquisition unit decreases.
前記触媒の上流側に設けられる攪拌部（１２）と、
所定の液体を噴霧として前記攪拌部に向けて噴射する噴射装置（１３、５３）と、
前記攪拌部の下流側における噴霧の微粒化または気化が進むように、前記触媒が設けられる触媒設置通路部の排気の状態に応じて前記噴射装置の噴射粒径および噴射速度の一方または両方を制御する噴霧制御部（２４、３４、４４、６４、７４、８４）と、
を備え、
前記噴霧制御部（３４、４４）は、噴射粒径および噴射速度の制御範囲を、噴射粒径が比較的大きくなる第１制御範囲（Ａ１）と噴射粒径が比較的小さくなる第２制御範囲（Ａ２）との間で前記触媒設置通路部の排気流量に応じて切り替え、
前記噴霧制御部（４４）は、前記噴射装置の噴射粒径と噴射速度とを互いに独立して制御可能であり、
前記噴霧制御部は、前記第１制御範囲および前記第２制御範囲のうち、前記触媒の入口における前記噴射装置からの噴射物の目標均質度をより低エネルギで達成する方を用いるエンジンの触媒反応システム。 The catalysts (11, 51) provided in the exhaust system passages (91, 101) of the engine (90) and
A stirring unit (12) provided on the upstream side of the catalyst and
An injection device (13, 53) that injects a predetermined liquid as a spray toward the stirring unit.
One or both of the injection particle size and the injection speed of the injection device are controlled according to the exhaust state of the catalyst installation passage where the catalyst is provided so that the atomization or vaporization of the spray on the downstream side of the stirring unit proceeds. Spray control unit (24, 34, 44, 64, 74, 84) and
With
The spray control unit (34, 44) sets the control range of the injection particle size and the injection speed in the first control range (A1) in which the injection particle size is relatively large and the second control range in which the injection particle size is relatively small. Switch between (A2) and the catalyst installation passage according to the exhaust flow rate.
The spray control unit (44) can control the injection particle size and the injection speed of the injection device independently of each other.
The spray control unit uses the one of the first control range and the second control range that achieves the target homogeneity of the injection material from the injection device at the inlet of the catalyst with lower energy. system.
前記触媒の上流側に設けられる攪拌部（１２）と、
所定の液体を噴霧として前記攪拌部に向けて噴射する噴射装置（１３、５３）と、
前記攪拌部の下流側における噴霧の微粒化または気化が進むように、前記触媒が設けられる触媒設置通路部の排気の状態に応じて前記噴射装置の噴射粒径および噴射速度の一方または両方を制御する噴霧制御部（２４、３４、４４、６４、７４、８４）と、
を備え、
前記噴霧制御部（３４、４４）は、噴射粒径および噴射速度の制御範囲を、噴射粒径が比較的大きくなる第１制御範囲（Ａ１）と噴射粒径が比較的小さくなる第２制御範囲（Ａ２）との間で前記触媒設置通路部の排気流量に応じて切り替え、
前記噴霧制御部（４４）は、前記噴射装置の噴射粒径と噴射速度とを互いに独立して制御可能であり、
前記噴霧制御部は、前記触媒の入口における前記液体の目標均質度を達成可能な噴射粒径と噴射速度との組合せが複数あって、それらの組合せ同士で必要エネルギの差が所定値以内である場合、噴霧粒径がより小さくなる組合せを採用するエンジンの触媒反応システム。 The catalysts (11, 51) provided in the exhaust system passages (91, 101) of the engine (90) and
A stirring unit (12) provided on the upstream side of the catalyst and
An injection device (13, 53) that injects a predetermined liquid as a spray toward the stirring unit.
One or both of the injection particle size and the injection speed of the injection device are controlled according to the exhaust state of the catalyst installation passage where the catalyst is provided so that the atomization or vaporization of the spray on the downstream side of the stirring unit proceeds. Spray control unit (24, 34, 44, 64, 74, 84) and
With
The spray control units (34, 44) control the injection particle size and the injection speed in a first control range (A1) in which the injection particle size is relatively large and a second control range in which the injection particle size is relatively small. Switch between (A2) and the catalyst installation passage according to the exhaust flow rate.
The spray control unit (44) can control the injection particle size and the injection speed of the injection device independently of each other.
The spray control unit has a plurality of combinations of injection particle size and injection speed capable of achieving the target homogeneity of the liquid at the inlet of the catalyst, and the difference in required energy between these combinations is within a predetermined value. If the engine's catalytic reaction system employs a combination with a smaller spray particle size .
前記触媒は排気中の所定成分を還元浄化する請求項１〜１０のいずれか一項に記載のエンジンの触媒反応システム。 The liquid is a reducing agent or a precursor thereof, and is
The catalytic reaction system for an engine according to any one of claims 1 to 10 , wherein the catalyst reduces and purifies a predetermined component in exhaust gas.
前記触媒は排熱を用いて燃料を反応させる請求項１〜１０のいずれか一項に記載のエンジンの触媒反応システム。 The liquid is a fuel
The catalyst reaction system for an engine according to any one of claims 1 to 10 , wherein the catalyst reacts fuel using exhaust heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2019/049647 WO2020137750A1 (en) | 2018-12-28 | 2019-12-18 | Catalytic reaction system for engine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018247805 | 2018-12-28 | ||
| JP2018247805 | 2018-12-28 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2020109289A JP2020109289A (en) | 2020-07-16 |
| JP2020109289A5 true JP2020109289A5 (en) | 2021-01-14 |
| JP6927261B2 JP6927261B2 (en) | 2021-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2019179747A Active JP6927261B2 (en) | 2018-12-28 | 2019-09-30 | Engine catalytic reaction system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6927261B2 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3518391B2 (en) * | 1999-02-24 | 2004-04-12 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
| JP2002038942A (en) * | 2000-07-24 | 2002-02-06 | Toyota Motor Corp | Exhaust emission control device for internal combustion engine |
| JP4558816B2 (en) * | 2008-06-05 | 2010-10-06 | 株式会社日本自動車部品総合研究所 | Exhaust gas purification device for internal combustion engine |
| JP2012189048A (en) * | 2011-03-14 | 2012-10-04 | Toyota Industries Corp | Exhaust gas purification device |
| JP2013133805A (en) * | 2011-12-27 | 2013-07-08 | Toyota Motor Corp | Mixing device |
| JP2016125472A (en) * | 2015-01-08 | 2016-07-11 | フタバ産業株式会社 | Spray device and exhaust emission control device |
| JP6685728B2 (en) * | 2016-01-06 | 2020-04-22 | 株式会社Ｓｏｋｅｎ | Exhaust gas purification device for internal combustion engine |
-
2019
- 2019-09-30 JP JP2019179747A patent/JP6927261B2/en active Active
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