JP5660945B2 - 内燃機関の触媒劣化判定装置 - Google Patents
内燃機関の触媒劣化判定装置 Download PDFInfo
- Publication number
- JP5660945B2 JP5660945B2 JP2011060648A JP2011060648A JP5660945B2 JP 5660945 B2 JP5660945 B2 JP 5660945B2 JP 2011060648 A JP2011060648 A JP 2011060648A JP 2011060648 A JP2011060648 A JP 2011060648A JP 5660945 B2 JP5660945 B2 JP 5660945B2
- Authority
- JP
- Japan
- Prior art keywords
- fuel ratio
- air
- catalyst
- output
- sensor
- 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.)
- Active
Links
- 239000003054 catalyst Substances 0.000 title claims description 68
- 230000006866 deterioration Effects 0.000 title claims description 38
- 238000002485 combustion reaction Methods 0.000 title claims description 12
- 239000000446 fuel Substances 0.000 claims description 120
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 41
- 239000001301 oxygen Substances 0.000 claims description 41
- 229910052760 oxygen Inorganic materials 0.000 claims description 41
- 239000007789 gas Substances 0.000 claims description 29
- 229910000510 noble metal Inorganic materials 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 description 14
- 229910052739 hydrogen Inorganic materials 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 229910002091 carbon monoxide Inorganic materials 0.000 description 7
- 230000007423 decrease Effects 0.000 description 7
- 238000011144 upstream manufacturing Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000010970 precious metal Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
Images
Landscapes
- Exhaust Gas After Treatment (AREA)
Description
41…中央演算装置
42…記憶装置
43…入力インターフェース
44…出力インターフェース
52…三元触媒
54…リアO2センサ
Claims (1)
- 排気ガスを浄化する触媒と、
触媒から排出される排気ガス中の酸素濃度を検出する酸素濃度検出手段と、
酸素濃度検出手段の出力に応じて空燃比をフィードバック制御するフィードバック制御手段とを備える内燃機関において、
目標空燃比を理論空燃比よりもリッチな値に設定する目標空燃比設定手段と、
目標空燃比設定手段により理論空燃比よりもリッチな値に目標空燃比を設定した後、触媒内の吸蔵酸素が放出されて酸素濃度検出手段の出力が理論空燃比よりもリッチであることを示す信号レベルに変化した時点での当該出力と、その時点から所定時間が経過した時点での酸素濃度検出手段の出力との間で、一定値以上の変化が生じている場合に触媒の貴金属が劣化したと判断する劣化判定手段と
を備える内燃機関の触媒劣化判定装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011060648A JP5660945B2 (ja) | 2011-03-18 | 2011-03-18 | 内燃機関の触媒劣化判定装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011060648A JP5660945B2 (ja) | 2011-03-18 | 2011-03-18 | 内燃機関の触媒劣化判定装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2012197676A JP2012197676A (ja) | 2012-10-18 |
JP5660945B2 true JP5660945B2 (ja) | 2015-01-28 |
Family
ID=47180158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011060648A Active JP5660945B2 (ja) | 2011-03-18 | 2011-03-18 | 内燃機関の触媒劣化判定装置 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP5660945B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6102908B2 (ja) * | 2014-12-26 | 2017-03-29 | トヨタ自動車株式会社 | 排気浄化装置の劣化診断装置 |
JP7151696B2 (ja) | 2019-12-25 | 2022-10-12 | トヨタ自動車株式会社 | 触媒劣化検出装置 |
JP7136075B2 (ja) | 2019-12-25 | 2022-09-13 | トヨタ自動車株式会社 | 触媒劣化検出装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001124730A (ja) * | 1999-10-25 | 2001-05-11 | Mitsubishi Motors Corp | 水素濃度検出装置及び内燃機関の触媒劣化検出装置 |
JP2002256856A (ja) * | 2001-03-06 | 2002-09-11 | Mitsubishi Motors Corp | 排気浄化触媒の劣化検出装置 |
JP4935547B2 (ja) * | 2007-07-09 | 2012-05-23 | トヨタ自動車株式会社 | 内燃機関の異常判定装置 |
JP2007198251A (ja) * | 2006-01-26 | 2007-08-09 | Toyota Motor Corp | 触媒劣化検出装置 |
JP4371114B2 (ja) * | 2006-02-28 | 2009-11-25 | トヨタ自動車株式会社 | 内燃機関の排気浄化装置 |
-
2011
- 2011-03-18 JP JP2011060648A patent/JP5660945B2/ja active Active
Also Published As
Publication number | Publication date |
---|---|
JP2012197676A (ja) | 2012-10-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6572932B2 (ja) | アンモニア検出装置の異常診断装置 | |
JP5273297B2 (ja) | 触媒異常診断装置 | |
US11492952B2 (en) | Catalyst degradation detection apparatus | |
JP6597101B2 (ja) | 排気浄化制御装置 | |
JP2018178761A (ja) | 内燃機関の排気浄化装置 | |
JP2008175173A (ja) | 空燃比制御装置 | |
JP5660945B2 (ja) | 内燃機関の触媒劣化判定装置 | |
JP4636273B2 (ja) | 内燃機関の排気浄化装置 | |
JP4693896B2 (ja) | 内燃機関制御装置 | |
JP4190430B2 (ja) | 酸素センサの異常診断装置 | |
JP7136075B2 (ja) | 触媒劣化検出装置 | |
JP5035670B2 (ja) | 内燃機関の触媒劣化検出装置 | |
JP4894529B2 (ja) | 触媒劣化検出装置 | |
JP2005083205A (ja) | 内燃機関の制御装置 | |
JP2004204716A (ja) | 空燃比サブフィードバック制御異常検出装置 | |
JP2024115883A (ja) | 空燃比制御装置 | |
JP6750536B2 (ja) | 内燃機関の排気浄化装置 | |
JP2024048517A (ja) | 内燃機関の制御装置 | |
JP2024055343A (ja) | 排気浄化触媒の劣化診断方法及び排気浄化触媒の劣化診断装置 | |
JP2023161331A (ja) | 内燃機関の排気浄化装置 | |
JP4661626B2 (ja) | 内燃機関の排気浄化装置 | |
JP4657111B2 (ja) | 内燃機関の炭化水素吸着材パージ制御装置 | |
JP2006022779A (ja) | 内燃機関の排ガス浄化装置。 | |
JP2006307685A (ja) | 酸素センサの異常検出装置 | |
JP2023116239A (ja) | 内燃機関の排気浄化装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20140304 |
|
TRDD | Decision of grant or rejection written | ||
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20141128 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20141202 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20141202 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 5660945 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |