JP2010275987A - 直動式燃料噴射弁の制御装置 - Google Patents
直動式燃料噴射弁の制御装置 Download PDFInfo
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- 238000002347 injection Methods 0.000 title claims abstract description 97
- 239000007924 injection Substances 0.000 title claims abstract description 97
- 239000000446 fuel Substances 0.000 title claims abstract description 67
- 230000000630 rising effect Effects 0.000 claims description 26
- 238000006073 displacement reaction Methods 0.000 claims description 16
- 230000001174 ascending effect Effects 0.000 claims 2
- 238000001514 detection method Methods 0.000 abstract description 17
- 239000000243 solution Substances 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 21
- 238000002485 combustion reaction Methods 0.000 description 19
- 230000001276 controlling effect Effects 0.000 description 17
- 239000003990 capacitor Substances 0.000 description 13
- 230000008859 change Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000000875 corresponding effect Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 230000002596 correlated effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
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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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
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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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2464—Characteristics of actuators
- F02D41/2467—Characteristics of actuators for injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
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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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
- F02D2041/2006—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening by using a boost capacitor
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
- F02D2041/201—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening by using a boost inductance
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage control
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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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
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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
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel 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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2464—Characteristics of actuators
- F02D41/2467—Characteristics of actuators for injectors
- F02D41/247—Behaviour for small quantities
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
- F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
- F02M2200/705—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for filling or emptying hydraulic chamber, e.g. for compensating clearance or thermal expansion
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
【解決手段】直動式のピエゾインジェクタ10を制御対象とした制御装置において、ピエゾ電圧の波形中に、ニードル(弁体)の閉弁タイミングt7と同じタイミングで僅かに電圧上昇P1が生じていることを本発明者は見出した。この点を鑑みて、ニードルの閉弁作動が完了したことに伴い生じた電圧上昇P1の発生時期を検出する(電圧上昇検出手段)。そして、その発生時期t7に基づき、充電終了から閉弁完了までのニードル下降時間T10を算出し、そのニードル下降時間を加味して、ピエゾ素子への充電量(例えば充電期間におけるピエゾ電圧のピーク値)を制御することで、ニードルの開弁リフト量を制御する。そのため、開弁リフト量を高精度で制御でき、ひいては噴孔からの噴射量を高精度で制御できる。
【選択図】 図5
Description
図1は、本実施形態にかかる直動式燃料噴射弁の制御装置20,60、及び制御装置20,60の制御対象となる直動式燃料噴射弁(ピエゾインジェクタ10)を示すとともに、ピエゾインジェクタ10が搭載された車両用内燃機関(ディーゼルエンジン)の噴射システム全体を示す図である。
上記実施形態では、放電終了時点t6以降のピエゾ電圧の波形中に、ニードル閉弁タイミングt7と同じタイミングで僅かに電圧上昇P1が生じていることに着目して、ニードル下降時間T10を算出し、算出した下降時間T10に基づきピエゾ素子52へのピーク電圧Vp(充電量)をフィードバック制御している。
本発明は上記実施形態の記載内容に限定されず、以下のように変更して実施してもよい。また、各実施形態の特徴的構成をそれぞれ任意に組み合わせるようにしてもよい。
Claims (6)
- 燃料を噴射する噴孔が形成されたボデー、前記ボデーに収容されて前記噴孔を開閉する弁体、及び充電量又は放電量の大きさに応じて変位するピエゾ素子を備え、前記ピエゾ素子の変位量により前記弁体を開閉駆動させる直動式燃料噴射弁を制御対象とした制御装置において、
前記ピエゾ素子の電極間の電圧を計測する電圧計測手段と、
前記電圧計測手段により計測された電圧の波形中に、前記弁体の閉弁作動が完了したことに伴い生じた電圧上昇の発生時期を検出する電圧上昇検出手段と、
前記ピエゾ素子の放電開始から前記閉弁作動の完了までの弁体下降時間を、前記電圧上昇検出手段により検出された発生時期に基づき算出する下降時間算出手段と、
前記下降時間算出手段により算出された弁体下降時間を加味して前記ピエゾ素子への充電量を制御することで、前記弁体の開弁リフト量を制御する充電量制御手段と、
を備えることを特徴とする直動式燃料噴射弁の制御装置。 - 前記充電量制御手段は、前記ピエゾ素子へ複数回電流を流すことで前記電極間の電圧を徐々に上昇させて充電させるとともに、複数回の最後に流す電流の通電時間を前記弁体下降時間に基づき制御することで、前記ピエゾ素子への充電量を制御することを特徴とする請求項1に記載の直動式燃料噴射弁の制御装置。
- 前記電圧上昇検出手段は、前記電圧計測手段により計測された電圧が前記ピエゾ素子の放電終了後に所定の閾値を超えた時期を、前記電圧上昇の発生時期として検出することを特徴とする請求項1又は2に記載の直動式燃料噴射弁の制御装置。
- 燃料を噴射する噴孔が形成されたボデー、前記ボデーに収容されて前記噴孔を開閉する弁体、及び充電量又は放電量の大きさに応じて変位するピエゾ素子を備え、前記ピエゾ素子の変位量により前記弁体を開閉駆動させる直動式燃料噴射弁を制御対象とした制御装置において、
前記ピエゾ素子の電極間の電圧を計測する電圧計測手段と、
前記電圧計測手段により計測された電圧の波形において、前記ピエゾ素子への充電終了後にピエゾ電圧の下降速度が所定速度以下又はゼロになった所定時期を検出する下降状態検出手段と、
前記ピエゾ素子への充電開始から前記弁体の開弁作動の完了までの弁体上昇時間を、前記下降状態検出手段により検出された所定時期に基づき算出する上昇時間算出手段と、
前記上昇時間算出手段により算出された弁体上昇時間を加味して前記ピエゾ素子への充電量を制御することで、前記弁体の開弁リフト量を制御する充電量制御手段と、
を備えることを特徴とする直動式燃料噴射弁の制御装置。 - 前記充電量制御手段は、前記ピエゾ素子へ複数回電流を流すことで前記電極間の電圧を徐々に上昇させて充電させるとともに、複数回の最後に流す電流の通電時間を前記弁体上昇時間に基づき制御することで、前記ピエゾ素子への充電量を制御することを特徴とする請求項4に記載の直動式燃料噴射弁の制御装置。
- 前記下降状態検出手段は、前記電圧計測手段により計測された電圧の微分値が前記ピエゾ素子の充電終了後に所定の閾値より低下した時期、又は前記微分値がゼロになった時期を、前記所定時期として検出することを特徴とする請求項4又は5に記載の直動式燃料噴射弁の制御装置。
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JP2009131881A JP4911197B2 (ja) | 2009-06-01 | 2009-06-01 | 直動式燃料噴射弁の制御装置 |
DE201010017093 DE102010017093A1 (de) | 2009-06-01 | 2010-05-26 | Steuervorrichtung für ein Kraftstoffdirekteinspritzventil |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104350262A (zh) * | 2012-06-14 | 2015-02-11 | 罗伯特·博世有限公司 | 用于运行阀的方法 |
CN105840330A (zh) * | 2015-01-29 | 2016-08-10 | 罗伯特·博世有限公司 | 用于获知燃料喷射器的注入过程的特征性的时间点的方法 |
KR101816390B1 (ko) | 2016-04-26 | 2018-01-08 | 현대자동차주식회사 | 인젝터의 미소 닫힘 시간 제어를 위한 인젝터 특성 보정 방법 |
JP2018119475A (ja) * | 2017-01-25 | 2018-08-02 | 株式会社デンソー | 燃料噴射制御装置 |
KR20180122695A (ko) * | 2016-04-18 | 2018-11-13 | 콘티넨탈 오토모티브 게엠베하 | 디젤 공통-레일 압전-동작식 서보 분사기를 동작시키는 방법 및 자동차 |
CN110612388A (zh) * | 2017-05-19 | 2019-12-24 | 株式会社电装 | 燃料喷射控制装置 |
JP7363590B2 (ja) | 2020-03-05 | 2023-10-18 | 株式会社デンソー | 噴射制御装置 |
Families Citing this family (4)
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DE102013206600B4 (de) | 2013-04-12 | 2015-08-06 | Continental Automotive Gmbh | Einspritzsystem zum Einspritzen von Kraftstoff in eine Brennkraftmaschine und Regelverfahren für ein solches Einspritzsystem |
DE102013207555B3 (de) | 2013-04-25 | 2014-10-09 | Continental Automotive Gmbh | Verfahren zur Einspritzmengenadaption |
EP2796703B1 (en) | 2013-04-26 | 2016-07-20 | Continental Automotive GmbH | Valve assembly for an injection valve and injection valve |
EP3232038B1 (en) * | 2014-12-08 | 2021-02-24 | Hitachi Automotive Systems, Ltd. | Fuel control device for internal combustion engine |
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JP2008240544A (ja) * | 2007-03-26 | 2008-10-09 | Nippon Soken Inc | 燃料噴射制御装置及び燃料噴射装置 |
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2009
- 2009-06-01 JP JP2009131881A patent/JP4911197B2/ja not_active Expired - Fee Related
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2010
- 2010-05-26 DE DE201010017093 patent/DE102010017093A1/de not_active Ceased
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Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
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