JP7291656B2 - 内燃機関の制御装置 - Google Patents
内燃機関の制御装置 Download PDFInfo
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- JP7291656B2 JP7291656B2 JP2020060879A JP2020060879A JP7291656B2 JP 7291656 B2 JP7291656 B2 JP 7291656B2 JP 2020060879 A JP2020060879 A JP 2020060879A JP 2020060879 A JP2020060879 A JP 2020060879A JP 7291656 B2 JP7291656 B2 JP 7291656B2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/15—Digital data processing
- F02P5/1502—Digital data processing using one central computing unit
- F02P5/1504—Digital data processing using one central computing unit with particular means during a transient phase, e.g. acceleration, deceleration, gear change
-
- 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
- F01N9/00—Electrical control of exhaust gas treating 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
-
- 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
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
- F02D41/0245—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus by increasing temperature of the exhaust gas leaving the engine
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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
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/068—Introducing corrections for particular operating conditions for engine starting or warming up for warming-up
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/045—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions combined with electronic control of other engine functions, e.g. fuel injection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/15—Digital data processing
- F02P5/1502—Digital data processing using one central computing unit
-
- 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
- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
- F01N2430/08—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by modifying ignition or injection timing
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1602—Temperature of exhaust gas apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/021—Engine temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0802—Temperature of the exhaust gas treatment apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Theoretical Computer Science (AREA)
- Signal Processing (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Ignition Timing (AREA)
- Exhaust Gas After Treatment (AREA)
Description
図1は、本開示に係る内燃機関の制御装置の実施形態1を示すブロック図である。本実施形態に係る制御装置10は、たとえば、シリーズ方式のハイブリッド車などの車両に搭載され、内燃機関としてのエンジン1を制御する。
Δθ = Δθas (T_cw ≧ T1) ・・・(2)
Δθ = Δθds (T_cat ≧ T2) ・・・(4)
次に、図1から図3を援用し、図12から図15を参照して、本開示に係る内燃機関の制御装置の実施形態2を説明する。
次に、図1から図3を援用し、図16から図19を参照して、本開示に係る内燃機関の制御装置の実施形態3を説明する。
Δτb ={η_i(θ)-η_i(θ+Δθb)}×Mf×Hl/(2×π×R) ・・・(12)
1d 気筒
10 制御装置
P2 処理(冷却水加温制御、進角制御)
P5 処理(触媒加温制御、遅角制御)
P_thr スロットル開度
T1 第1閾値
T2 第2閾値
T3 第3閾値
T_cat 触媒温度
T_cw 冷却水温度
θ 点火時期
θ_lim(+) 遅角限界値
θ_lim(-) 進角限界値
η_cw 冷却水へのエネルギー配分
η_exh 排気へのエネルギー配分
τ トルク
Claims (6)
- 冷却水温度と排気系の触媒温度を取得して内燃機関の点火時期を制御する制御装置であって、
前記冷却水温度が第1閾値以下の場合に前記内燃機関から冷却水へのエネルギー配分を増加させる冷却水加温制御と、
前記触媒温度が第2閾値以下の場合に前記内燃機関から排気へのエネルギー配分を増加させる触媒加温制御と、を実行し、
前記冷却水加温制御において前記点火時期を早める進角制御を実行し、
前記触媒加温制御において前記点火時期を遅らせる遅角制御を実行し、
前記触媒温度が前記第2閾値以下でかつ前記冷却水温度が前記第1閾値以下の場合に、前記内燃機関を構成する複数の気筒のうち、一部の前記気筒に対して前記遅角制御を実行し、その他の前記気筒に対して前記進角制御を実行することを特徴とする内燃機関の制御装置。 - 冷却水温度と排気系の触媒温度を取得して内燃機関の点火時期を制御する制御装置であって、
前記冷却水温度が第1閾値以下の場合に前記内燃機関から冷却水へのエネルギー配分を増加させる冷却水加温制御と、
前記触媒温度が第2閾値以下の場合に前記内燃機関から排気へのエネルギー配分を増加させる触媒加温制御と、を実行し、
前記冷却水加温制御において前記点火時期を早める進角制御を実行し、
前記触媒加温制御において前記点火時期を遅らせる遅角制御を実行し、
前記触媒温度が前記第2閾値以下でかつ前記冷却水温度が前記第1閾値以下の場合に、前記遅角制御と前記進角制御とを交互に実行することを特徴とする内燃機関の制御装置。 - 冷却水温度と排気系の触媒温度を取得して内燃機関の点火時期を制御する制御装置であって、
前記冷却水温度が第1閾値以下の場合に前記内燃機関から冷却水へのエネルギー配分を増加させる冷却水加温制御と、
前記触媒温度が第2閾値以下の場合に前記内燃機関から排気へのエネルギー配分を増加させる触媒加温制御と、を実行し、
前記冷却水加温制御において前記点火時期を早める進角制御を実行し、
前記触媒加温制御において前記点火時期を遅らせる遅角制御を実行し、
前記進角制御において、前記第1閾値と前記冷却水温度との差が増大するほど前記点火時期を早める進角補正量を増大させ、
前記進角制御において、前記進角補正量が進角限界値を超える場合に、前記進角補正量を前記進角限界値に設定し、
前記進角限界値は、前記内燃機関の駆動系へのエネルギー配分と前記冷却水へのエネルギー配分との合計が最大になる点火時期に基づいて設定することを特徴とする内燃機関の制御装置。 - 前記遅角制御において、前記第2閾値と前記触媒温度との差が増大するほど前記点火時期を遅らせる遅角補正量を増大させることを特徴とする請求項1から請求項3のいずれか一項に記載の内燃機関の制御装置。
- すべての前記気筒のトルクが同等になるように前記遅角制御の遅角補正量と前記進角制御の進角補正量とを決定することを特徴とする請求項1に記載の内燃機関の制御装置。
- 前記遅角制御において、前記遅角補正量が遅角限界値を超える場合に、前記遅角補正量を前記遅角限界値に設定することを特徴とする請求項4に記載の内燃機関の制御装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020060879A JP7291656B2 (ja) | 2020-03-30 | 2020-03-30 | 内燃機関の制御装置 |
| CN202180009036.4A CN114945744B (zh) | 2020-03-30 | 2021-01-15 | 内燃机的控制装置 |
| US17/793,550 US20230079934A1 (en) | 2020-03-30 | 2021-01-15 | Control Device for Internal Combustion Engine |
| PCT/JP2021/001178 WO2021199576A1 (ja) | 2020-03-30 | 2021-01-15 | 内燃機関の制御装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020060879A JP7291656B2 (ja) | 2020-03-30 | 2020-03-30 | 内燃機関の制御装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2021161872A JP2021161872A (ja) | 2021-10-11 |
| JP7291656B2 true JP7291656B2 (ja) | 2023-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2020060879A Active JP7291656B2 (ja) | 2020-03-30 | 2020-03-30 | 内燃機関の制御装置 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20230079934A1 (ja) |
| JP (1) | JP7291656B2 (ja) |
| CN (1) | CN114945744B (ja) |
| WO (1) | WO2021199576A1 (ja) |
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| IT202300000576A1 (it) * | 2023-01-17 | 2024-07-17 | Ferrari Spa | Metodo di regolazione di un motore a combustione interna e motore a combustione interna |
| JP2025083128A (ja) * | 2023-11-20 | 2025-05-30 | トヨタ自動車株式会社 | 車両 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000240547A (ja) | 1998-12-24 | 2000-09-05 | Honda Motor Co Ltd | 内燃機関の点火時期制御装置 |
| JP2001059470A (ja) | 1999-08-23 | 2001-03-06 | Fuji Heavy Ind Ltd | エンジンの触媒暖機制御装置 |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61169666A (ja) * | 1985-01-21 | 1986-07-31 | Honda Motor Co Ltd | 内燃エンジンの点火時期制御方法 |
| JPH06257546A (ja) * | 1993-03-05 | 1994-09-13 | Nissan Motor Co Ltd | 内燃機関の点火時期制御装置 |
| JP2860852B2 (ja) * | 1993-03-18 | 1999-02-24 | 株式会社ユニシアジェックス | 内燃機関のアイドル回転速度制御装置 |
| JPH11351045A (ja) * | 1998-06-09 | 1999-12-21 | Hitachi Ltd | エンジンの状態を示す量の推定方法 |
| EP1013923A3 (en) * | 1998-12-24 | 2002-11-06 | Honda Giken Kogyo Kabushiki Kaisha | Ignition timing control system for internal combustion engine |
| JP3891064B2 (ja) * | 2002-07-16 | 2007-03-07 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
| JP3867672B2 (ja) * | 2003-01-27 | 2007-01-10 | トヨタ自動車株式会社 | 筒内噴射式内燃機関の燃焼制御装置 |
| JP2007211594A (ja) * | 2006-02-07 | 2007-08-23 | Toyota Motor Corp | エンジン |
| JP2009133276A (ja) * | 2007-11-30 | 2009-06-18 | Mitsubishi Electric Corp | 内燃機関の制御装置 |
| US7950368B2 (en) * | 2008-11-06 | 2011-05-31 | Ford Global Technologies, Llc | Engine and exhaust heating |
| US7762232B2 (en) * | 2008-11-06 | 2010-07-27 | Ford Global Technologies, Llc | Engine and exhaust heating for hybrid vehicle |
| JP5310330B2 (ja) * | 2009-07-09 | 2013-10-09 | トヨタ自動車株式会社 | 車両制御装置 |
| JP6094599B2 (ja) * | 2013-02-01 | 2017-03-15 | 日産自動車株式会社 | 内燃機関の制御装置および制御方法 |
| US9541014B2 (en) * | 2014-11-21 | 2017-01-10 | Ford Global Technologies, Llc | Method for pre-ignition control |
| JP6626738B2 (ja) * | 2016-02-26 | 2019-12-25 | 日立オートモティブシステムズ株式会社 | 内燃機関制御装置 |
| JP6733105B2 (ja) * | 2018-02-23 | 2020-07-29 | 三菱電機株式会社 | 内燃機関の制御装置及び制御方法 |
| JP6752325B2 (ja) * | 2019-04-12 | 2020-09-09 | 三菱電機株式会社 | 内燃機関の制御装置及び制御方法 |
-
2020
- 2020-03-30 JP JP2020060879A patent/JP7291656B2/ja active Active
-
2021
- 2021-01-15 WO PCT/JP2021/001178 patent/WO2021199576A1/ja not_active Ceased
- 2021-01-15 US US17/793,550 patent/US20230079934A1/en not_active Abandoned
- 2021-01-15 CN CN202180009036.4A patent/CN114945744B/zh active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000240547A (ja) | 1998-12-24 | 2000-09-05 | Honda Motor Co Ltd | 内燃機関の点火時期制御装置 |
| JP2001059470A (ja) | 1999-08-23 | 2001-03-06 | Fuji Heavy Ind Ltd | エンジンの触媒暖機制御装置 |
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| JP2021161872A (ja) | 2021-10-11 |
| CN114945744A (zh) | 2022-08-26 |
| WO2021199576A1 (ja) | 2021-10-07 |
| CN114945744B (zh) | 2024-06-18 |
| US20230079934A1 (en) | 2023-03-16 |
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