JP2014181599A - 空燃比制御装置 - Google Patents
空燃比制御装置 Download PDFInfo
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- JP2014181599A JP2014181599A JP2013056274A JP2013056274A JP2014181599A JP 2014181599 A JP2014181599 A JP 2014181599A JP 2013056274 A JP2013056274 A JP 2013056274A JP 2013056274 A JP2013056274 A JP 2013056274A JP 2014181599 A JP2014181599 A JP 2014181599A
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- fuel ratio
- air
- catalyst
- output
- sensor
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- 239000000446 fuel Substances 0.000 title claims abstract description 136
- 239000003054 catalyst Substances 0.000 claims abstract description 51
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 21
- 230000008859 change Effects 0.000 claims abstract description 15
- 238000000746 purification Methods 0.000 claims abstract description 7
- 238000002485 combustion reaction Methods 0.000 claims description 17
- 239000000126 substance Substances 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 29
- 238000002347 injection Methods 0.000 description 22
- 239000007924 injection Substances 0.000 description 22
- 230000007423 decrease Effects 0.000 description 11
- 230000003247 decreasing effect Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
【解決手段】触媒の上流の空燃比センサの出力と比較するべき目標値を、触媒の下流の空燃比センサの出力に基づく空燃比の度合いを表す指標値FACFに応じて上下させる。その上で、前記指標値FACFの変化量に対する前記目標値の変化量の比を、前記指標値FACFが理論空燃比周辺の範囲内にあるときにはより小さく、前記指標値FACFが当該理論空燃比周辺の範囲からリーン側またはリッチ側に偏倚しているときにはより大きく設定する。
【選択図】図4
Description
1…気筒
11…インジェクタ
4…排気通路
41…触媒
43…触媒の上流の空燃比センサ(O2センサ)
44…触媒の下流の空燃比センサ(O2センサ)
f…触媒の上流の空燃比センサの出力(電圧)
g…触媒の下流の空燃比センサの出力(電圧)
Claims (1)
- 内燃機関の排気通路に装着される排気ガス浄化用の触媒の上流及び下流に設けられた空燃比センサの出力を参照して空燃比をフィードバック制御するものであって、
触媒の上流の空燃比センサの出力と比較するべき目標値を、触媒の下流の空燃比センサの出力に基づく空燃比の度合いを表す指標値に応じて上下させることとし、
前記指標値の変化量に対する前記目標値の変化量の比を、前記指標値が理論空燃比周辺の範囲内にあるときにはより小さく、前記指標値が当該理論空燃比周辺の範囲からリーン側またはリッチ側に偏倚しているときにはより大きく設定した空燃比制御装置。
Priority Applications (1)
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JP2013056274A JP6188364B2 (ja) | 2013-03-19 | 2013-03-19 | 空燃比制御装置 |
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JP2013056274A JP6188364B2 (ja) | 2013-03-19 | 2013-03-19 | 空燃比制御装置 |
Publications (2)
Publication Number | Publication Date |
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JP2014181599A true JP2014181599A (ja) | 2014-09-29 |
JP6188364B2 JP6188364B2 (ja) | 2017-08-30 |
Family
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JP2013056274A Expired - Fee Related JP6188364B2 (ja) | 2013-03-19 | 2013-03-19 | 空燃比制御装置 |
Country Status (1)
Country | Link |
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JP (1) | JP6188364B2 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0642387A (ja) * | 1992-07-22 | 1994-02-15 | Mitsubishi Electric Corp | 内燃機関の空燃比制御装置 |
JP2003206784A (ja) * | 2002-01-16 | 2003-07-25 | Mazda Motor Corp | エンジンの空燃比制御装置 |
JP2006022772A (ja) * | 2004-07-09 | 2006-01-26 | Mitsubishi Electric Corp | 内燃機関の空燃比制御装置 |
JP2013002430A (ja) * | 2011-06-22 | 2013-01-07 | Daihatsu Motor Co Ltd | 内燃機関の制御装置 |
-
2013
- 2013-03-19 JP JP2013056274A patent/JP6188364B2/ja not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0642387A (ja) * | 1992-07-22 | 1994-02-15 | Mitsubishi Electric Corp | 内燃機関の空燃比制御装置 |
JP2003206784A (ja) * | 2002-01-16 | 2003-07-25 | Mazda Motor Corp | エンジンの空燃比制御装置 |
JP2006022772A (ja) * | 2004-07-09 | 2006-01-26 | Mitsubishi Electric Corp | 内燃機関の空燃比制御装置 |
JP2013002430A (ja) * | 2011-06-22 | 2013-01-07 | Daihatsu Motor Co Ltd | 内燃機関の制御装置 |
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JP6188364B2 (ja) | 2017-08-30 |
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