JP2008196474A - 内燃機関の吸気制御装置 - Google Patents
内燃機関の吸気制御装置 Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0021—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
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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
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
- F02D11/107—Safety-related aspects
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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
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0223—Variable control of the intake valves only
- F02D13/0226—Variable control of the intake valves only changing valve lift or valve lift and timing
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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
- F02D41/0002—Controlling intake air
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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
- F02D41/22—Safety or indicating devices for abnormal conditions
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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
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
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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
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1413—Controller structures or design
- F02D2041/1418—Several control loops, either as alternatives or simultaneous
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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
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1413—Controller structures or design
- F02D2041/1432—Controller structures or design the system including a filter, e.g. a low pass or high pass filter
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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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
- F02D2041/225—Leakage detection
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0402—Engine intake system parameters the parameter being determined by using a model of the engine intake or its components
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold pressure
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
- F02D2200/703—Atmospheric pressure
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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
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/41—Control to generate negative pressure in the intake manifold, e.g. for fuel vapor purging or brake booster
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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
- F02D41/08—Introducing corrections for particular operating conditions for idling
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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
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
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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
- F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
- F02D41/187—Circuit arrangements for generating control signals by measuring intake air flow using a hot wire flow sensor
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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
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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
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
【解決手段】本発明は、少なくとも吸気バルブのリフト量を連続的に調節して吸入空気量を制御する可変動弁機構と、吸気管内のゲージ圧を所定の目標ゲージ圧に保持するためのスロットル弁と、を備える内燃機関における吸気制御装置を提供する。この装置は、所定の基準ゲージ圧、基準大気圧および基準吸気温度における吸入空気量とスロットル開口面積との関係を表す第1のテーブルを参照して、目標吸入空気量から基準スロットル開口面積を求める手段と、目標ゲージ圧、現在の大気圧、および現在の吸気温度を用いてベルヌーイの定理に基づき導出された補正パラメータで該基準スロットル開口面積を補正して、目標ゲージ圧を達成するスロットル開口面積を求める手段と、を有する。
【選択図】図2
Description
Qe(今回値)=θ(今回値)+ GAIR_CMD(今回値) (1)
θ(今回値)=θ(前回値)+P・e(今回値) (2)
e(今回値)=
GAIR(今回値)―(θ(前回値)+GAIR_CMD(今回値)) (3)
E=PBGA―PBGA_CMD (10)
σ(今回値)=E(今回値)+pole×E(前回値) (11)
m=A/AD (14)
14 吸気バルブ
40 可変動弁機構
42 可変リフト機構
46 スロットル弁
52 吸気管内圧力センサ
54 吸気温度センサ
56 大気圧センサ
62 有効吸入空気量算出部
64 基準スロットル開口面積算出部
66 スロットル開口面積補正部
68 フィードバック補正部
70 スロットル開度算出部
Claims (11)
- 少なくとも吸気バルブのリフト量を調節して吸入空気量を制御する可変動弁機構と、吸気管内のゲージ圧を所定の目標ゲージ圧に保持するためのスロットル弁と、を備える内燃機関の吸気制御装置であって、
所定の基準ゲージ圧、基準大気圧、および基準吸気温度における吸入空気量とスロットル開口面積との関係を表す第1のテーブルを、目標吸入空気量に基づいて参照して、基準スロットル開口面積を求める基準スロットル開口面積算出手段と、
前記目標ゲージ圧、現在の大気圧、および現在の吸気温度を用いてベルヌーイの定理に基づき導出された補正パラメータで、前記基準スロットル開口面積を補正して、前記目標ゲージ圧を達成するためのスロットル開口面積を求めるスロットル開口面積算出手段と、
を備える、吸気制御装置。 - さらに、吸入空気量検出手段によって検出される実吸入空気量と前記目標吸入空気量との偏差を最小にするフィルタ処理により、有効吸入空気量を算出する手段を備え、
前記基準スロットル開口面積算出手段は、前記有効吸入空気量に基づいて前記第1のテーブルを参照して、前記基準スロットル開口面積を求める、
請求項1に記載の吸気制御装置。 - さらに、前記スロットル開口面積と前記スロットル弁の開度との関係を表す第2のテーブルを、前記スロットル開口面積に基づいて参照して、前記スロットル弁の開度を求めるスロットル開度算出手段を備える、
請求項1または2に記載の吸気制御装置。 - さらに、前記吸気管内のゲージ圧を前記目標ゲージ圧に収束させるための前記スロットル開口面積の補正量を求め、該補正量を、前記スロットル開口面積算出手段により求められたスロットル開口面積に加算して、該スロットル開口面積をフィードバック補正するフィードバック補正手段を備える、
請求項1から3のいずれかに記載の吸気制御装置。 - 前記フィードバック補正手段は、内燃機関が低負荷および高負荷状態のとき、燃料カット時、目標ゲージ圧が小さいとき、ならびに目標ゲージ圧の変動が大きいとき、前記補正量を決めるためのフィードバックゲインを変化させる、
請求項4に記載の吸気制御装置。 - 前記フィードバック補正手段は、スロットル全開時、内燃機関の始動時、および吸気バルブのリフト量を固定して運転している時には、前記補正量を0にしてフィードバック補正を停止する、
請求項4または5に記載の吸気制御装置。 - さらに、前記内燃機関の吸気の粘性を表すパラメータ、および、前記吸気管の開口面積に対する、前記スロットル開口面積算出手段によって算出された前記スロットル開口面積の開口面積比に基づいて、該スロットル開口面積を補正する補正手段を備える、
請求項1から6のいずれかに記載の吸気制御装置。 - 前記粘性を表すパラメータは、レイノルズ数であり、
さらに、前記有効吸入空気量、前記吸気管の開口面積、該吸気管の内径および前記吸気の粘性係数に基づいて、前記レイノルズ数を算出する手段を備える、
請求項7に記載の吸気制御装置。 - さらに、前記現在の吸気温度に基づいて、前記粘性係数を算出する手段を備える、
請求項8に記載の装置。 - 前記フィードバック補正手段は、前記補正手段によって補正されたスロットル開口面積について前記補正量を求め、該補正量を、該補正されたスロットル開口面積に加算して、フィードバック補正する、
請求項7から9のいずれかに記載の装置。 - 前記吸気管内のゲージ圧と前記目標ゲージ圧との差が所定値より大きければ、前記フィードバック補正手段によるフィードバック補正を禁止し、前記スロットル弁の開度を所定値に制御する、
請求項7から10のいずれかに記載の装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP08000175A EP1947313B1 (en) | 2007-01-16 | 2008-01-07 | Determination of abnormality of an intake air system of an internal combustion engine |
DE200860006613 DE602008006613D1 (de) | 2007-01-16 | 2008-01-07 | Bestimmung der Anomalität eines Luftansaugsystems eines Verbrennungsmotors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2007006845 | 2007-01-16 |
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JP2008196474A true JP2008196474A (ja) | 2008-08-28 |
JP4257375B2 JP4257375B2 (ja) | 2009-04-22 |
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JP2007236391A Expired - Fee Related JP4257375B2 (ja) | 2007-01-16 | 2007-09-12 | 内燃機関の吸気制御装置 |
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EP (1) | EP1947314A1 (ja) |
JP (1) | JP4257375B2 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2251538A1 (en) * | 2009-04-22 | 2010-11-17 | Honda Motor Co., Ltd. | Intake control system and method for internal combusion engine |
JP2011144682A (ja) * | 2010-01-12 | 2011-07-28 | Honda Motor Co Ltd | スロットル弁通過空気流量推定装置及び大気圧推定装置 |
JP6234531B1 (ja) * | 2016-10-17 | 2017-11-22 | 三菱電機株式会社 | 内燃機関制御装置 |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5253239B2 (ja) * | 2008-04-07 | 2013-07-31 | 本田技研工業株式会社 | 内燃機関の制御装置 |
JP4759622B2 (ja) * | 2009-01-09 | 2011-08-31 | 本田技研工業株式会社 | 内燃機関の制御装置 |
WO2011132464A1 (ja) | 2010-04-23 | 2011-10-27 | 本田技研工業株式会社 | 内燃機関の吸気パラメータ算出装置および吸気パラメータ算出方法 |
US9133811B2 (en) * | 2010-12-27 | 2015-09-15 | Nissan Motor Co., Ltd. | Method and apparatus for controlling start-up of internal combustion engine |
JP5047376B1 (ja) * | 2011-04-21 | 2012-10-10 | 三菱電機株式会社 | 内燃機関の制御装置および内燃機関の制御方法 |
WO2016027354A1 (ja) * | 2014-08-21 | 2016-02-25 | 日産自動車株式会社 | 内燃機関の燃料噴射制御装置及び燃料噴射制御方法 |
WO2016038591A1 (en) * | 2014-09-12 | 2016-03-17 | Bombardier Recreational Products Inc. | Method for controlling a forced induction engine |
KR101628488B1 (ko) * | 2014-09-25 | 2016-06-08 | 현대자동차주식회사 | 카본 퇴적량이 변경된 etc의 제어 방법 |
JP6237654B2 (ja) * | 2015-01-14 | 2017-11-29 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
JP6147289B2 (ja) * | 2015-04-08 | 2017-06-14 | 三菱電機株式会社 | 自動二輪車の吸入空気量推定装置 |
JP6328201B2 (ja) * | 2016-10-05 | 2018-05-23 | 三菱電機株式会社 | 内燃機関の制御装置 |
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DE3932420A1 (de) * | 1989-09-28 | 1991-04-11 | Daimler Benz Ag | Verfahren zur betaetigung einer in der abgasleitung einer luftverdichtenden einspritzbrennkraftmaschine angeordneten drosselklappe |
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JP3784563B2 (ja) | 1999-02-05 | 2006-06-14 | 本田技研工業株式会社 | 内燃機関の動弁制御装置 |
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JP4114574B2 (ja) * | 2003-08-26 | 2008-07-09 | トヨタ自動車株式会社 | 内燃機関の吸気量制御装置及び吸気量制御方法 |
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-
2007
- 2007-09-12 JP JP2007236391A patent/JP4257375B2/ja not_active Expired - Fee Related
-
2008
- 2008-01-07 EP EP08000176A patent/EP1947314A1/en not_active Withdrawn
- 2008-01-09 US US12/007,354 patent/US7720591B2/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2251538A1 (en) * | 2009-04-22 | 2010-11-17 | Honda Motor Co., Ltd. | Intake control system and method for internal combusion engine |
US8271180B2 (en) | 2009-04-22 | 2012-09-18 | Honda Motor Co., Ltd. | Intake control system and method for internal combustion engine |
JP2011144682A (ja) * | 2010-01-12 | 2011-07-28 | Honda Motor Co Ltd | スロットル弁通過空気流量推定装置及び大気圧推定装置 |
JP6234531B1 (ja) * | 2016-10-17 | 2017-11-22 | 三菱電機株式会社 | 内燃機関制御装置 |
Also Published As
Publication number | Publication date |
---|---|
US7720591B2 (en) | 2010-05-18 |
US20080189026A1 (en) | 2008-08-07 |
EP1947314A1 (en) | 2008-07-23 |
JP4257375B2 (ja) | 2009-04-22 |
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