JP6550689B2 - 排出ガスセンサのヒータ制御装置 - Google Patents
排出ガスセンサのヒータ制御装置 Download PDFInfo
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- JP6550689B2 JP6550689B2 JP2014095791A JP2014095791A JP6550689B2 JP 6550689 B2 JP6550689 B2 JP 6550689B2 JP 2014095791 A JP2014095791 A JP 2014095791A JP 2014095791 A JP2014095791 A JP 2014095791A JP 6550689 B2 JP6550689 B2 JP 6550689B2
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- temperature
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- heater
- exhaust gas
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- 230000001737 promoting effect Effects 0.000 claims description 19
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 238000005336 cracking Methods 0.000 claims description 10
- 230000007613 environmental effect Effects 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 54
- 239000000446 fuel Substances 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 230000004913 activation Effects 0.000 description 15
- 239000003054 catalyst Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1493—Details
- F02D41/1494—Control of sensor heater
-
- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of 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
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
-
- 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
- F01N2560/20—Sensor having heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1493—Details
- F02D41/1495—Detection of abnormalities in the air/fuel ratio feedback system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Description
まず、図1に基づいてエンジン制御システムの概略構成を説明する。
内燃機関であるエンジン11の排気管12(排出ガス通路)には、排出ガス中のCO,HC,NOX 等を浄化する三元触媒等の触媒13が設けられている。この触媒13の上流側と下流側には、それぞれ排出ガスの空燃比又はリッチ/リーン等を検出する排出ガスセンサ14,15(空燃比センサ又は酸素センサ等)が設けられている。各排出ガスセンサ14,15には、それぞれセンサ素子(図示せず)を加熱するヒータ16,17が内蔵されている。
図3に示すヒータ通電制御ルーチンは、ECU18の電源オン期間中に所定周期で繰り返し実行され、特許請求の範囲でいうヒータ通電制御手段としての役割を果たす。
この後、ステップ104に進み、ヒータ16の通電デューティを予熱促進用の通電デューティd1 に設定してセンサ素子の温度を速やかに昇温させる。
Claims (2)
- 内燃機関(11)の排出ガス通路(12)に設けられた排出ガスセンサ(14)のセンサ素子を加熱するヒータ(16)と、前記センサ素子を被水による素子割れが発生しない温度範囲内で予熱するように前記ヒータ(16)の通電を制御する予熱制御を実行するヒータ通電制御手段(18)とを備えた排出ガスセンサのヒータ制御装置において、
前記ヒータ通電制御手段(18)は、
前記排出ガス通路内が乾燥状態であるか否かを判定する乾燥判定手段を有し、該乾燥判 定手段により前記排出ガス通路内が乾燥状態ではないと判定された場合には、前記予熱制 御を実行し、
前記予熱制御の際に、前記センサ素子の温度が所定の上限温度に到達したと判定するまでは、前記ヒータ(16)の通電制御値を前記センサ素子の温度が前記上限温度に到達したと判定した後の通電制御値である第2通電制御値よりも大きい予熱促進用の一定の通電制御値である第1通電制御値に設定して少なくとも前記第1通電制御値による前記ヒータ(16)への通電を行ない、
前記センサ素子の温度が前記上限温度に到達したと判定した時点で前記ヒータ(16)の通電制御値を一定の通電制御値である前記第2通電制御値に切替えることにより前記センサ素子の温度を前記上限温度に維持し、
前記センサ素子の温度が前記上限温度に到達したか否かを、センサ素子のインピーダン スが上限温度判定インピーダンスよりも小さいか否かで判定するものであり、
前記センサ素子の温度が前記上限温度に到達したと判定され、且つ前記乾燥判定手段に より前記排出ガス通路内が乾燥状態であると判定されたときには、前記第1通電制御値、 及び前記第2通電制御値よりも大きい昇温用の一定の通電制御値に切り換えて前記センサ 素子の温度を昇温させることを特徴とする排出ガスセンサのヒータ制御装置。 - 前記ヒータ通電制御手段(18)は、前記内燃機関(11)の運転条件と環境条件のうちの少なくとも一方に応じて前記予熱促進用の第1通電制御値を算出することを特徴とする請求項1に記載の排出ガスセンサのヒータ制御装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014095791A JP6550689B2 (ja) | 2014-05-07 | 2014-05-07 | 排出ガスセンサのヒータ制御装置 |
DE112015002122.1T DE112015002122T5 (de) | 2014-05-07 | 2015-04-13 | Heizersteuervorrichtung für einen Abgassensor |
PCT/JP2015/002055 WO2015170447A1 (ja) | 2014-05-07 | 2015-04-13 | 排出ガスセンサのヒータ制御装置 |
US15/308,929 US10337435B2 (en) | 2014-05-07 | 2015-04-13 | Heater control device for exhaust gas sensor |
Applications Claiming Priority (1)
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---|---|---|---|
JP2014095791A JP6550689B2 (ja) | 2014-05-07 | 2014-05-07 | 排出ガスセンサのヒータ制御装置 |
Publications (2)
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JP2015212668A JP2015212668A (ja) | 2015-11-26 |
JP6550689B2 true JP6550689B2 (ja) | 2019-07-31 |
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JP2014095791A Active JP6550689B2 (ja) | 2014-05-07 | 2014-05-07 | 排出ガスセンサのヒータ制御装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US10337435B2 (ja) |
JP (1) | JP6550689B2 (ja) |
DE (1) | DE112015002122T5 (ja) |
WO (1) | WO2015170447A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6349906B2 (ja) * | 2014-04-21 | 2018-07-04 | 株式会社デンソー | 排出ガスセンサのヒータ制御装置 |
JP6493281B2 (ja) * | 2016-04-11 | 2019-04-03 | トヨタ自動車株式会社 | 排気センサの制御装置 |
JP6658573B2 (ja) * | 2017-01-26 | 2020-03-04 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
GB201715515D0 (en) | 2017-09-26 | 2017-11-08 | Continental Automotive Gmbh | Method for operating a catalyst arrangement of an internal combustion engine and catalyst arrangement |
US10570872B2 (en) | 2018-02-13 | 2020-02-25 | Ford Global Technologies, Llc | System and method for a range extender engine of a hybrid electric vehicle |
US10781784B2 (en) | 2018-02-13 | 2020-09-22 | Ford Global Technologies, Llc | System and method for a range extender engine of a hybrid electric vehicle |
JP6888563B2 (ja) * | 2018-02-13 | 2021-06-16 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
Family Cites Families (15)
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US6304813B1 (en) * | 1999-03-29 | 2001-10-16 | Toyota Jidosha Kabushiki Kaisha | Oxygen concentration detector and method of using same |
JP4110874B2 (ja) * | 2002-08-09 | 2008-07-02 | 株式会社デンソー | 内燃機関のガスセンサの加熱制御装置 |
JP3824984B2 (ja) * | 2002-09-06 | 2006-09-20 | 三菱電機株式会社 | 排気ガスセンサの温度制御装置 |
JP4570082B2 (ja) * | 2004-03-22 | 2010-10-27 | 日本特殊陶業株式会社 | ガスセンサの制御装置 |
US7084379B2 (en) | 2004-03-22 | 2006-08-01 | Ngk Spark Plug Co., Ltd. | Control apparatus for gas sensor |
JP2007120390A (ja) | 2005-10-27 | 2007-05-17 | Denso Corp | 排出ガスセンサのヒータ制御装置 |
JP4151723B2 (ja) * | 2006-09-25 | 2008-09-17 | 株式会社デンソー | 内燃機関のガスセンサの加熱制御装置 |
US8362405B2 (en) * | 2008-01-18 | 2013-01-29 | Denso Corporation | Heater controller of exhaust gas sensor |
JP2009281867A (ja) * | 2008-05-22 | 2009-12-03 | Autonetworks Technologies Ltd | センサ用ヒータ制御装置 |
JP2010032275A (ja) * | 2008-07-25 | 2010-02-12 | Toyota Motor Corp | ガスセンサの制御装置 |
US9212971B2 (en) * | 2012-08-17 | 2015-12-15 | Robert Bosch Gmbh | Oxygen sensor regeneration |
US10234420B2 (en) * | 2013-09-20 | 2019-03-19 | Denso Corporation | Gas sensor control device |
JP6349906B2 (ja) * | 2014-04-21 | 2018-07-04 | 株式会社デンソー | 排出ガスセンサのヒータ制御装置 |
JP6241360B2 (ja) * | 2014-04-23 | 2017-12-06 | 株式会社デンソー | 排出ガスセンサのヒータ制御装置 |
JP6406311B2 (ja) * | 2016-05-09 | 2018-10-17 | トヨタ自動車株式会社 | 排気センサの制御装置 |
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2014
- 2014-05-07 JP JP2014095791A patent/JP6550689B2/ja active Active
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2015
- 2015-04-13 US US15/308,929 patent/US10337435B2/en active Active
- 2015-04-13 WO PCT/JP2015/002055 patent/WO2015170447A1/ja active Application Filing
- 2015-04-13 DE DE112015002122.1T patent/DE112015002122T5/de active Pending
Also Published As
Publication number | Publication date |
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WO2015170447A1 (ja) | 2015-11-12 |
JP2015212668A (ja) | 2015-11-26 |
DE112015002122T5 (de) | 2017-02-02 |
US10337435B2 (en) | 2019-07-02 |
US20170074147A1 (en) | 2017-03-16 |
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