JP6661593B2 - 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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- 238000002485 combustion reaction Methods 0.000 title claims description 140
- 230000009467 reduction Effects 0.000 claims description 172
- 239000013618 particulate matter Substances 0.000 claims description 106
- 238000000034 method Methods 0.000 claims description 35
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- 230000007423 decrease Effects 0.000 claims description 20
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- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
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- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
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- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
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- 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
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- 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
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- F02P5/152—Digital data processing dependent on pinking
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- F02D—CONTROLLING COMBUSTION ENGINES
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- F02D2041/001—Controlling intake air for engines with variable valve actuation
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- F02D2200/02—Input parameters for engine control the parameters being related to the engine
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- F02D2200/0406—Intake manifold pressure
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- 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
- F02D2200/0414—Air temperature
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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
- F02D2250/38—Control for minimising smoke emissions, e.g. by applying smoke limitations on the fuel injection amount
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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
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/025—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures
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- 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
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
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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
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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
Description
また、通常、アイドル運転状態では、内燃機関の回転数を目標のアイドル回転数に維持するための回転数制御が実行され、ノーロード運転状態では、アクセルペダルの踏み込みによる回転数の上昇(吹き上がり)を防止するための回転数制御が実行される。この点を考慮し、本発明によれば、アイドル運転状態及びノーロード運転状態では、粒子状物質低減遅角制御を禁止することによって、回転数制御を優先的に支障なく行えるとともに、それ以外の内燃機関の負荷運転状態では、粒子状物質低減遅角制御を実行することによって、粒子状物質の低減効果を可能な限り得ることができる。
IGLOG=IGMBT+IGRRQT+IGTW+IGTA+IGRIDL
・・・(1)
式(1)の右辺のIGRIDLは、アイドル運転時及びその後の発進制御時において、エンジン回転数を目標回転数に維持するなどのために適用される所定のアイドル遅角量であり、発進制御から通常運転への移行時には、値0に徐々に収束するように設定される。
IGCR
=−IGCRWOT・(ETAC−ETACWOT)/(ETACMAX−ETAC WOT)+IGCRWOT ・・・(2)
IGCR=(i/NRS)・IGCR ・・・(3)
ここで、右辺のIGCRは、図4のステップ32やステップ33などで算出された煤低減要求遅角量IGCRであり、NRSは所定回数である。
IGCR=(1−(i/NRE))・IGCRINI ・・・(4)
ここで、NREは所定回数である。
GAIRCMD=GAIRBS/KTRQDN ・・・(5)
MBT燃焼時トルクは基本的に吸気量に比例し、トルクダウン率KTRQDNは、上述したように、MBT燃焼時トルクを基準とする。この関係から、式(5)により、基本値GAIRBSをトルクダウン率KTRQDNで除算し、目標吸気量GAIRCMDを増量補正することによって、煤低減遅角制御を実行したときの出力トルクの減少分に相当する吸気量が適切に補償されるので、エンジン3の出力トルクの減少を防止し、目標トルクTRQCMDを確保することができる。
3 内燃機関
6 点火プラグ
9 ターボチャージャ(過給機)
31 吸気圧センサ(運転状態検出手段)
32 エアフローセンサ(運転状態検出手段)
33 クランク角センサ(運転状態検出手段)
35 水温センサ(運転状態検出手段)
37 大気圧センサ(運転状態検出手段)
IGLOG 点火時期
IGCR 煤低減要求遅角量(粒子状物質低減遅角量)
IGMBT 最適点火時期(基準点火時期)
TW エンジン水温(内燃機関の温度、運転状態)
NE エンジン回転数(内燃機関の回転数、運転状態)
ETAC 充填効率(内燃機関の負荷、運転状態)
PBA 吸気圧(内燃機関の運転状態)
GAIR 吸気量(内燃機関の運転状態)
PA 大気圧(内燃機関の運転状態)
TRQCMD 目標トルク
GAIRBS 目標吸気量の基本値(目標吸気量)
KTRQDN トルクダウン率(吸気量補正パラメータ)
GAIRCMD 目標吸気量
IGKNOCK ノッキング抑制要求遅角量(ノッキング抑制遅角量)
IGKCS ノック学習値
Claims (11)
- 内燃機関の運転状態を検出する運転状態検出手段と、
当該検出された内燃機関の運転状態に応じて、前記内燃機関の排気中の粒子状物質の生成量を低減するための点火時期の遅角量である粒子状物質低減遅角量を算出する遅角量算出手段と、
点火時期の基準となる所定の基準点火時期を前記粒子状物質低減遅角量に応じて遅角させる粒子状物質低減遅角制御を実行する遅角制御手段と、を備え、
前記内燃機関は、車両に動力源として搭載されており、
前記遅角制御手段は、アイドル運転状態と、前記車両が停車中でかつ当該車両のシフトレバーがニュートラル位置又はパーキング位置に位置するノーロード運転状態とにおいて、前記粒子状物質低減遅角制御を禁止し、前記アイドル運転状態及び前記ノーロード運転状態以外の前記内燃機関の負荷運転状態において、前記粒子状物質低減遅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。 - 前記内燃機関の運転状態に応じて、前記内燃機関の最大の出力トルクが得られる最適点火時期を、前記基準点火時期として算出する基準点火時期算出手段をさらに備え、
前記遅角制御手段は、前記最適点火時期を前記粒子状物質低減遅角量に応じて遅角させることによって、点火時期を設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。 - 前記運転状態検出手段は、前記内燃機関の運転状態として、当該内燃機関の温度を検出し、
前記遅角制御手段は、前記検出された内燃機関の温度が所定の低温領域にあるときに、前記粒子状物質低減遅角制御を実行することを特徴とする、請求項1又は2に記載の内燃機関の制御装置。 - 前記運転状態検出手段は、前記内燃機関の運転状態として、当該内燃機関の回転数、負荷及び温度を検出し、
前記遅角量算出手段は、前記検出された内燃機関の回転数、負荷及び温度に基づき、前記粒子状物質低減遅角量を算出することを特徴とする、請求項1から3のいずれかに記載の内燃機関の制御装置。 - 前記遅角量算出手段は、前記粒子状物質低減遅角制御が開始される際に、前記粒子状物質低減遅角量を、当該開始直前の値から遅角側に徐々に変化するように算出することを特徴とする、請求項1から4のいずれかに記載の内燃機関の制御装置。
- 前記遅角量算出手段は、前記粒子状物質低減遅角制御が終了される際に、前記粒子状物質低減遅角量を、当該終了直前の値から進角側に徐々に変化するように算出することを特徴とする、請求項1から5のいずれかに記載の内燃機関の制御装置。
- 前記運転状態検出手段は、前記内燃機関の運転状態として大気圧を検出し、
前記遅角量算出手段は、前記検出された大気圧が低いほど、前記粒子状物質低減遅角量をより制限するように算出することを特徴とする、請求項1から6のいずれかに記載の内燃機関の制御装置。 - 前記運転状態検出手段は、前記内燃機関の運転状態として、当該内燃機関の温度を検出し、
前記遅角量算出手段は、前記検出された内燃機関の温度が低いほど、前記粒子状物質低減遅角量をより制限するように算出することを特徴とする、請求項1から7のいずれかに記載の内燃機関の制御装置。 - 前記内燃機関の目標トルクに応じて目標吸気量を設定する目標吸気量設定手段と、
前記粒子状物質低減遅角量に応じて、前記粒子状物質低減遅角制御を実行したときの前記内燃機関の出力トルクの減少分に相当する吸気量を補償するための吸気量補正パラメータを算出する吸気量補正パラメータ算出手段と、
当該算出された吸気量補正パラメータを用いて、前記設定された目標吸気量を増量補正する吸気量補正手段と、
をさらに備えることを特徴とする、請求項1から8のいずれかに記載の内燃機関の制御装置。 - 前記内燃機関のノッキングの発生限界に基づき、当該ノッキングを抑制するための点火時期の遅角量であるノッキング抑制遅角量を算出するノッキング抑制遅角量算出手段と、
当該ノッキング抑制遅角量に基づき、ノッキング制御に用いるノック学習値を更新する学習手段と、
前記粒子状物質低減遅角量が前記ノッキング抑制遅角量よりも遅角側にあるときに、前記ノック学習値の更新を禁止する学習禁止手段と、
をさらに備えることを特徴とする、請求項1から9のいずれかに記載の内燃機関の制御装置。 - 前記内燃機関は、吸気を過給する過給機を有し、
前記遅角量算出手段は、前記過給機による過給運転中、前記内燃機関の負荷が高いほど、前記粒子状物質低減遅角量をより制限するように算出し、過給圧が最大過給圧のときに、前記粒子状物質低減遅角量を0に設定することを特徴とする、請求項1から10のいずれかに記載の内燃機関の制御装置。
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US8555857B2 (en) * | 2010-11-16 | 2013-10-15 | GM Global Technology Operations LLC | Method and apparatus for controlling spark timing in an internal combustion engine |
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