JP3993851B2 - 点火時期を制御する装置 - Google Patents
点火時期を制御する装置 Download PDFInfo
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- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
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- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
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- F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
- F02D2200/602—Pedal position
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- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
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- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
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- 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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- 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
- F02P5/152—Digital data processing dependent on pinking
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- F02P5/00—Advancing or retarding ignition; Control therefor
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- 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
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- F02P5/1525—Digital data processing dependent on pinking with means for compensating the variation of the characteristics of the pinking sensor or of the electrical means, e.g. by ageing
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/40—Engine management systems
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- Electrical Control Of Ignition Timing (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Description
次に図面を参照してこの発明の実施の形態を説明する。図1は、この発明の実施形態に従う、エンジンおよびその制御装置の全体的な構成図である。
発明の理解を助けるため、図2を参照して、本願発明の原理を簡単に説明する。図2において、縦軸は、筒内圧の図示平均有効圧を示し、横軸は、点火時期を示す。点火時期の特性曲線31は、点火時期と図示平均有効圧との相関関係を示す。図示平均有効圧の算出手法については、後述される。図に示されるように、特性曲線31は極大値32を持ち、該極大値32に対応する点火時期は、最大の燃焼効率を実現することができる最適点火時期MBTと呼ばれる。
図3は、本願発明の一実施形態に従う、点火時期制御装置のブロック図である。変動信号生成器41は、変動信号DIGIDを生成する。変動信号DIGIDは、図2を参照して説明した変動成分に対応する。変動信号DIGIDの今回値は、点火時期信号生成器42に渡される。一実施例では、変動信号DIGIDの値は、予めメモリ1cに記憶しておくことができる。
補正値DIGOPは、最適点火時期MBTに収束させるための補正値である。点火時期信号IGLOGに、変動信号DIGIDが含まれることに注意されたい。信号DIGIDのような変動成分を意図的に点火時期信号IGLOGに含ませることにより、(IGBASE+DIGOP)を所定範囲内で揺動させる。
図5を参照して、図示平均有効圧を簡単に説明する。図5は、エンジンの燃焼室の体積と筒内圧との関係を示す。点Pにおいて、吸気弁が開き、吸気行程が開始する。筒内圧は、ピストンが上死点TDCにある点Nを経て、最小値である点Uに至るまで減少する。その後、ピストンが下死点BDCである点Kを経て、筒内圧は増加する。点Qにおいて圧縮行程が開始する。圧縮行程において、筒内圧は増加する。点Rにおいて燃焼行程が開始し、混合気の燃焼により筒内圧は急激に増加し、点Sにおいて、筒内圧は最大になる。混合気の燃焼により、ピストンは押し下げられ、点Mで示されるBDCに向かって移動する。この移動により、筒内圧は減少する。点Tにおいて排気弁が開き、排気工程が開始する。排気工程では、筒内圧はさらに減少する。
図9を参照すると、図2と同様の図が示されている。点火時期の特性曲線71は極大値72を持ち、極大値72に対応する点火時期が、最適点火時期MBTである。しかしながら、実際には、燃焼サイクルごとに燃焼状態が変動するので、点火時期に対する図示平均有効圧Pmi_actは、通常、幅73を持つ網掛け領域74に示されるような範囲内に分布する。
λ1=1、λ2=1:最小2乗法アルゴリズム
λ1=1、λ2=λ:漸減ゲインアルゴリズム(λは、0、1以外の所定値)
λ1==λ、λ2=1:重み付き最小2乗法アルゴリズム(λは、0、1以外の所定値)。
点火時期コントローラ45は、推定曲線から算出された最適点火時期に収束するよう点火時期を制御する。具体的には、最適点火時期MBTに対する偏差EIGOPがゼロに収束するように、補正値DIGOPを算出する。補正値DIGOPを基準値IGBASEに加えることにより、偏差EIGOPが補償されるようにする。
図16および図17を参照して、本願発明の一実施形態に従う点火時期制御の効果を説明する。
図18は、点火時期制御のプロセスのメインルーチンを示す。このルーチンは、燃焼サイクルに同期して実施される。このフローチャートは、単気筒エンジンについてのプロセスを一例として示している。多気筒エンジンの場合には、各気筒の燃焼サイクルごとに、該気筒についての該プロセスが実施される。たとえば、4気筒エンジンの場合には、180度のクランク角度ごとに、いずれかの気筒のプロセスが開始される。
2 エンジン
15 筒内圧センサ
Claims (6)
- 設定点火時期に変動成分を加えて、点火を実施するための最終点火時期を算出する点火時期算出器と、
前記最終点火時期に従って点火を実施した時に検出された筒内圧の図示平均有効圧を算出する平均有効圧算出器と、
前記図示平均有効圧と前記変動成分とに基づいて、該図示平均有効圧と該変動成分との相関関係を表す点火時期特性曲線を推定し、該特性曲線から、最適点火時期を算出するMBT算出器と、
前記最適点火時期に収束するように、前記設定点火時期を制御するコントローラと、を備える内燃機関の点火時期制御装置であって、
前記点火時期特性曲線は、前記変動成分を入力とし、前記図示平均有効圧を出力とする関数で表され、
前記MBT算出器は、さらに、前記平均有効圧算出器により算出された図示平均有効圧に基づいて、該関数における該変動成分に関連付けられた係数を同定する同定器を備え、該係数の同定により前記点火時期特性曲線を推定する、
内燃機関の点火時期制御装置。 - さらに、前記変動成分を生成する生成器を備え、
前記変動成分生成器は、前記関数の前記係数を同定するための自己励起条件を満たすように該変動成分を生成する、請求項1に記載の内燃機関の点火時期制御装置。 - 前記同定器は、さらに、
前記平均有効圧算出器により算出された図示平均有効圧と、前記変動成分を入力として前記関数から推定された推定図示平均有効圧との偏差がゼロになるように、前記係数の更新成分を算出し、該偏差がゼロに近づくにつれ予め設定された基準値に該係数が収束するように、該基準値に該係数の更新成分を加算することにより該係数を算出するよう構成され、
前記係数が前記基準値に収束した時に、前記最適点火時期に前記設定点火時期を収束させる前記制御が停止するように、該基準値は設定される、
請求項1に記載の内燃機関の点火時期制御装置。 - 前記係数のうちの少なくとも1つに所定の制限処理を実施し、前記点火時期特性曲線が、下側の凸状を持つ曲線として推定されることを防ぐようにする、請求項1に記載の内燃機関の点火時期制御装置。
- 前記平均有効圧算出器は、前記検出された筒内圧の交流成分を抽出し、該交流成分に基づいて前記図示平均有効圧を算出するよう構成される、請求項1に記載の内燃機関の点火時期制御装置。
- 前記コントローラは、前記設定点火時期の前記最適点火時期への応答特性を指定することのできる応答指定型制御を用いて、該設定点火時期を制御する、請求項1に記載の内燃機関の点火時期制御装置。
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003385741A JP3993851B2 (ja) | 2003-11-14 | 2003-11-14 | 点火時期を制御する装置 |
TW093132052A TW200523467A (en) | 2003-11-14 | 2004-10-21 | An ignition timing controlling device |
RU2006115365/06A RU2371601C2 (ru) | 2003-11-14 | 2004-11-05 | Способ и устройство для регулирования момента зажигания |
BRPI0415942-0A BRPI0415942A (pt) | 2003-11-14 | 2004-11-05 | dispositivo e método de controle de temporização de ignição |
PCT/JP2004/016787 WO2005047692A1 (ja) | 2003-11-14 | 2004-11-05 | 点火時期を制御する装置および方法 |
CNB2004800334350A CN100513773C (zh) | 2003-11-14 | 2004-11-05 | 控制点火正时的装置和方法 |
EP04799639.2A EP1688615B1 (en) | 2003-11-14 | 2004-11-05 | Ignition timing controlling device and method |
KR1020067009518A KR101123560B1 (ko) | 2003-11-14 | 2004-11-05 | 점화 시기를 제어하는 장치 및 방법 |
CA2545713A CA2545713C (en) | 2003-11-14 | 2004-11-05 | Ignition timing controlling device and method |
US10/576,287 US7437233B2 (en) | 2003-11-14 | 2004-11-05 | Ignition timing controlling device and method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2003385741A JP3993851B2 (ja) | 2003-11-14 | 2003-11-14 | 点火時期を制御する装置 |
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JP2005146988A JP2005146988A (ja) | 2005-06-09 |
JP3993851B2 true JP3993851B2 (ja) | 2007-10-17 |
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JP2003385741A Expired - Fee Related JP3993851B2 (ja) | 2003-11-14 | 2003-11-14 | 点火時期を制御する装置 |
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Country | Link |
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US (1) | US7437233B2 (ja) |
EP (1) | EP1688615B1 (ja) |
JP (1) | JP3993851B2 (ja) |
KR (1) | KR101123560B1 (ja) |
CN (1) | CN100513773C (ja) |
BR (1) | BRPI0415942A (ja) |
CA (1) | CA2545713C (ja) |
RU (1) | RU2371601C2 (ja) |
TW (1) | TW200523467A (ja) |
WO (1) | WO2005047692A1 (ja) |
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US9121362B2 (en) | 2012-08-21 | 2015-09-01 | Brian E. Betz | Valvetrain fault indication systems and methods using knock sensing |
US9133775B2 (en) | 2012-08-21 | 2015-09-15 | Brian E. Betz | Valvetrain fault indication systems and methods using engine misfire |
JP5942805B2 (ja) * | 2012-11-16 | 2016-06-29 | トヨタ自動車株式会社 | 火花点火式内燃機関 |
US8973429B2 (en) | 2013-02-25 | 2015-03-10 | GM Global Technology Operations LLC | System and method for detecting stochastic pre-ignition |
DE102014007009B4 (de) * | 2014-05-13 | 2018-01-18 | Mtu Friedrichshafen Gmbh | Motorüberwachung mittels zylinderindividueller Drucksensoren vorzüglich bei Magergasmotoren mit gespülter Vorkammer |
DE102015203637A1 (de) * | 2015-03-02 | 2016-09-08 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Bestimmung eines Signalversatzes zwischen einem Kurbelwellenwinkelsignal und einem Brennraumdrucksignal bei einer Brennkraftmaschine |
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EP1688615B1 (en) | 2013-06-12 |
CA2545713C (en) | 2013-05-28 |
KR101123560B1 (ko) | 2012-03-16 |
RU2006115365A (ru) | 2007-11-10 |
BRPI0415942A (pt) | 2007-01-02 |
US20070271025A1 (en) | 2007-11-22 |
CA2545713A1 (en) | 2005-05-26 |
JP2005146988A (ja) | 2005-06-09 |
EP1688615A4 (en) | 2011-09-14 |
KR20060117950A (ko) | 2006-11-17 |
CN100513773C (zh) | 2009-07-15 |
TW200523467A (en) | 2005-07-16 |
CN1878951A (zh) | 2006-12-13 |
WO2005047692A1 (ja) | 2005-05-26 |
US7437233B2 (en) | 2008-10-14 |
EP1688615A1 (en) | 2006-08-09 |
RU2371601C2 (ru) | 2009-10-27 |
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