JP2016183671A - エンジンイベントを位置決定するためのシステム及び方法 - Google Patents
エンジンイベントを位置決定するためのシステム及び方法 Download PDFInfo
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02B77/08—Safety, indicating, or supervising devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
- F02D35/024—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure using an estimation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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
- F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
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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
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- G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
- G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
- G01L23/222—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines using piezoelectric devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02D41/02—Circuit arrangements for generating control signals
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- F02D2041/1433—Introducing closed-loop corrections characterised by the control or regulation method using a model or simulation of the system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
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- 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
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- Y02T10/40—Engine management systems
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Abstract
Description
10 エンジン
12 燃焼チャンバ
14 酸化剤供給部
16 空気、酸化剤
18 燃料
19 燃料供給部
20 ピストン
22 シャフト
23 ノックセンサ
24 負荷
25 システム
26 シリンダ
28 内側環状壁
30 キャビティ
34 軸方向の軸若しくは方向
36 径方向の軸若しくは方向
38 周方向の軸若しくは方向
40 上端部、トップランド
54 クランクシャフト
56 連結ロッド
58 ピン
60 燃料噴射器
62 吸入弁
64 排気弁
66 クランクシャフトセンサ
72 プロセッサ
74 メモリユニット
100 フローチャート
102 真のPFP位置
104 ノック信号
106 短時間フーリエ変換(STFT)
108 経時的なパワースペクトル密度(PSD)
110 予測周波数帯(PFB)をマイニングする
112 予測周波数帯(PFB)
114 特徴
116 モデル学習
118 予測モデル
130 フローチャート
132 特徴
134 予測されたピーク燃焼圧(PFP)位置
150 圧力信号プロット、圧力信号、圧力プロット
152 ノックセンサ信号
154 スペクトル写真
156 Y軸
158 X軸
160 最大点
162 Y軸
164 X軸
180 チャート
182 軸
184 発生
220 副信号
222 パワースペクトル密度プロット
224 特徴ベクトル
226 PFB線
228 特徴
240 ヒストグラム
242 X軸
244 Y軸
246 線
260 第1のグラフ
262 エンジンイベントの真の位置
264 第2のグラフ
266 時間
270 テーブル
Claims (20)
- エンジンイベント位置を推定するためのシステム(25)であって、
往復動エンジン(10)に接続された少なくとも1つのノックセンサ(23)から信号を受け取り、多変量変換アルゴリズムを用いて前記信号をパワースペクトル密度に変換し、予測周波数帯を用いて前記パワースペクトル密度を複数の特徴ベクトルに変換し、前記複数の特徴ベクトル及び予測モデルを少なくとも用いて前記エンジンイベント位置を予測し、前記エンジンイベント位置に基づいて前記往復動エンジン(10)の動作を調節するように構成されたコントローラ(72)を備えるシステム(25)。 - 前記エンジンイベントが、前記往復動エンジン(10)のシリンダのピーク燃焼圧を含む、請求項1に記載のシステム(25)。
- 前記コントローラ(72)が、前記往復動エンジン(10)のエンジンタイミングマップ、前記往復動エンジン(10)の酸化剤/燃料比、前記往復動エンジン(10)の排気再循環ガス流、前記往復動エンジン(10)の吸入弁(62)若しくは排気弁(64)の位置、又は前記往復動エンジン(10)の別の動作パラメータを、前記ピーク燃焼圧の前記位置に応じて調節するように構成される、請求項2に記載のシステム(25)。
- 前記エンジンイベントが、前記往復動エンジン(10)の吸入弁(62)及び/又は排気弁(64)の閉鎖を含む、請求項1に記載のシステム(25)。
- 前記多変量変換アルゴリズムが短時間フーリエ変換を含む、請求項1に記載のシステム(25)。
- 前記多変量変換アルゴリズムが離散コサイン変換を含む、請求項1に記載のシステム(25)。
- 前記少なくとも1つのノックセンサ(23)が、前記往復動エンジン(10)のシリンダ(26)内の振動及び/又は音響を検知するように構成された圧電式ノックセンサを含む、請求項1に記載のシステム(25)。
- 前記予測モデルが、個々の往復動エンジン(10)の前記エンジンイベント位置を予測するように訓練される、請求項1に記載のシステム(25)。
- 前記個々の往復動エンジン(10)が、ワーケシャVHPエンジン、イェンバッハ4型エンジン、又は任意の他の内部往復動エンジンを含む、請求項8に記載のシステム(25)。
- 往復動エンジン(10)におけるピーク燃焼圧の位置を推定するようにコントローラ(72)を訓練するための方法であって、
第1の信号を少なくとも1つのノックセンサ(23)から受け取ることであって、前記信号が、ピーク燃焼圧イベントに対応するデータを含む、第1の信号を受け取ること、
真のピーク燃焼圧位置に対応する第2の信号を圧力センサから受け取ること、
前記第1の信号を経時的な周波数エネルギーを含むパワースペクトル密度に変換すること、
前記パワースペクトル密度を前記第2の信号と比較して予測周波数帯を形成すること、
前記パワースペクトル密度を複数の特徴ベクトルに転換すること、及び、
前記複数の特徴ベクトル及び前記第2の信号を用いて予測モデルを生成するためのアルゴリズムを実行することであって、前記予測モデルが、通常のエンジン動作中の前記往復動エンジン(10)におけるピーク燃焼圧の前記位置を推定するように構成される、アルゴリズムを実行すること、を含む方法。 - 前記予測周波数帯が、弁別スコアを計算することにより形成される、請求項10に記載の方法。
- 前記弁別スコアの前記計算が、
経時的な前記周波数エネルギーの第1の部分集合を抽出することであって、前記第1の部分集合が、第1の周波数範囲の前記周波数エネルギーに対応する、抽出すること、
前記第1の部分集合をエネルギー増加の順序に整列させること、
前記第1の部分集合の各周波数エネルギーを正及び負として特徴付けることであって、前記正が、前記第1の信号のうち前記ピーク燃焼圧を含む副信号中で発生した前記周波数エネルギーに対応する、特徴付けること、
最大エネルギーを含む前記第1の部分集合の前記周波数エネルギーのセグメントを選択することであって、前記セグメントが、前記第1の部分集合内の前記正の数と等しい数の周波数エネルギーを含む、選択すること、
前記セグメント内の真の正である周波数エネルギーの前記数を決定して前記弁別スコアを計算すること、並びに、
前記弁別スコアが増加しなくなるまで、前記弁別スコアの前記計算を経時的な前記周波数エネルギーの第2の部分集合に繰り返すことであって、前記第2の部分集合が、第2の周波数範囲の前記周波数エネルギーに対応し、前記第2の周波数範囲が、前記第1の周波数範囲よりも大きい、繰り返すこと、を含む、請求項11に記載の方法。 - 前記圧力センサが、シリンダ内圧力センサである、請求項10に記載の方法。
- 前記機械学習アルゴリズムが、ロジスティック回帰分類器、サポートベクトルマシン、又は、特徴ベクトル及び圧力信号を用いて予測モデルを生成するように構成された別の機械学習アルゴリズムを含む、請求項10に記載の方法。
- 前記予測モデルが前記実際のピーク燃焼圧の10度以内の前記ピーク燃焼圧を推定するまで、前記方法が繰り返される、請求項10に記載の方法。
- 前記往復動エンジン(10)が、ワーケシャVHPエンジン、イェンバッハ4型エンジン、CFR−RONエンジン、又は任意の他の内部往復動エンジンである、請求項10に記載の方法。
- システム(25)であって、
往復動エンジン(10)のコントローラ(72)を備え、前記往復動エンジン(10)のコントローラ(72)が、
前記往復動エンジン(10)に接続された少なくとも1つのノックセンサ(23)から信号を受け取り、
多変量変換アルゴリズムを用いて前記信号を複数の経時的な周波数エネルギーを含むパワースペクトル密度に変換し、
予測周波数帯を用いて前記パワースペクトル密度を複数の特徴ベクトルに変換し、
前記複数の特徴ベクトル及び予測モデルを少なくとも用いてピーク燃焼圧の位置を予測し、
前記ピーク燃焼圧の前記位置に基づいて少なくとも前記往復動エンジン(10)の制御動作を出力する、
ように構成されている、システム(25)。 - 前記制御動作が、前記往復動エンジン(10)のエンジンタイミングマップ、往復動エンジン(10)の酸化剤/燃料比、前記往復動エンジン(10)の排気再循環ガス流、前記往復動エンジン(10)の吸入弁(62)若しくは排気弁(64)の位置、又は、前記往復動エンジン(10)の別の動作パラメータを、前記ピーク燃焼圧の前記位置に応じて調節することを含む、請求項17に記載のシステム(25)。
- 前記多変量変換アルゴリズムが短時間フーリエ変換を含む、請求項17に記載のシステム(25)。
- 前記予測モデルが、個々の往復動エンジン(10)の前記エンジンイベント位置を予測するように訓練される、請求項17に記載のシステム(25)。
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AU2016201507A1 (en) | 2016-10-13 |
BR102016005985A2 (pt) | 2016-09-27 |
CA2923277A1 (en) | 2016-09-24 |
US9593631B2 (en) | 2017-03-14 |
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