JP6805339B2 - 内燃機関の吸気弁ストローク位相差と排気弁ストローク位相差を、同じ振幅の線を用いて、組み合わせて識別する方法 - Google Patents
内燃機関の吸気弁ストローク位相差と排気弁ストローク位相差を、同じ振幅の線を用いて、組み合わせて識別する方法 Download PDFInfo
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Description
・関与している機械的な構成要素の製造時公差および/または取り付け時公差
・摩耗現象、例えば、それを介してクランクシャフトとカムシャフトが結合されているタイミングベルトまたは歯付きベルトの伸び
・高い機械的な負荷状態による弾性的なまたは塑性的な変形現象
であり得る。
・選択された各信号周波数の求められた振幅に基づいて、吸気弁ストローク位相差および排気弁ストローク位相差に関連している、選択された信号周波数の同じ振幅の線が求められる。これは、同じ振幅の、基準線特性マップに格納されている、または各代数モデル関数によって求められた基準線を用いて行われる。
・選択された信号周波数の同じ振幅の求められた線の共通の交点が、吸気弁ストローク位相差排気弁ストローク位相差との間に広がる共通の面への投影によって求められる。
・吸気弁ストローク位相差および排気弁ストローク位相差が、選択された信号周波数の同じ振幅の線の、求められた共通の交点から決定される。
内燃機関の動作時に、空気吸込み路における吸込み空気または排ガス流出路における排ガスの動的な圧力振動が継続的に測定され、または2つの領域においても動的な圧力振動が測定される。各測定は、圧力振動信号を生じさせる。同時に、クランクシャフト位相角度信号がセンサによって検出される。圧力振動信号およびクランクシャフト位相角度信号は、対応する信号入力側51を介して、内燃機関1の制御機器50に供給される。制御機器50内では、この圧力振動信号に対して、制御機器内に格納されているプログラムアルゴリズムを用いて、離散フーリエ変換が実施され、選択された信号周波数の各振幅、有利には、測定された圧力振動の、内燃機関の吸気周波数の第1高調波およびさらなる高調波の各振幅が、クランクシャフト位相角度信号に関して求められる。次に、個々の選択された信号周波数に対して、各振幅に基づいて、それぞれ対応する、同じ振幅の線が求められる。これはそれぞれ、対応する内燃機関シリーズに対して典型的な、制御機器50の格納領域内に格納されている基準線特性マップから同じ振幅の基準線を選択することによって、または対応する内燃機関シリーズに対して典型的な、制御機器の格納領域内に格納されている各代数モデル関数および対応する計算演算およびプログラムアルゴリズムを用いて計算することによって行われる。
Claims (11)
- 動作時に、シリーズ生産内燃機関のシリンダの吸気弁ストローク位相差と排気弁ストローク位相差を組み合わせて識別するための方法であって、
該当する前記シリーズ生産内燃機関の、空気吸込み路内の吸込み空気および/または排ガス流出路内の排ガスの、前記シリンダに割り当て可能な動的な圧力振動を動作中に測定し、ここから対応する圧力振動信号を作成し、同時に、クランクシャフト位相角度信号を求め、
前記圧力振動信号から、離散フーリエ変換を用いて、前記クランクシャフト位相角度信号に関する、測定された前記圧力振動の、選択された信号周波数の振幅を求める方法において、以下のさらなるステップ、すなわち、
前記選択された各信号周波数の求められた振幅に基づいて、吸気弁ストローク位相差および排気弁ストローク位相差に関連している、前記選択された信号周波数の同じ振幅の線を、同じ振幅の、基準線特性マップに格納されている、または各代数モデル関数によって求められた基準線を用いて求めるステップと、
前記選択された信号周波数の同じ振幅の求められた線の共通の交点を、吸気弁ストローク位相差と排気弁ストローク位相差との間に広がる共通の面への投影によって求めるステップと、
前記吸気弁ストローク位相差および前記排気弁ストローク位相差を、前記選択された信号周波数の同じ振幅の線の、求められた共通の交点から決定するステップと、
を特徴とする方法。 - 以下の先行するステップ、すなわち、
基準吸気弁ストローク位相差と基準排気弁ストローク位相差とに関連して、流入路および/または流出路内の前記圧力振動信号の選択された信号周波数の同じ振幅の基準線を特定するために基準内燃機関を計測するステップと、
基準吸気弁ストローク位相差と基準排気弁ストローク位相差とに関連して、前記圧力振動信号の前記選択された信号周波数の同じ振幅の前記基準線を基準線特性マップに格納するステップと、
を含む、請求項1記載の方法。 - 前記基準線特性マップを、該当するシリーズ生産内燃機関のエンジン制御機器の格納領域内に格納する、請求項2記載の方法。
- 前記圧力振動信号の前記選択された信号周波数の前記基準線特性マップから、各信号周波数に対して代数モデル関数を導出し、該代数モデル関数は、前記圧力振動信号の前記選択された信号周波数の同じ振幅の各基準線の経過を、基準吸気弁ストローク位相差ならびに基準排気弁ストローク位相差に関連して表している、請求項2記載の方法。
- 前記選択された信号周波数用の前記代数モデル関数を、該当するシリーズ生産内燃機関のエンジン制御機器の格納領域内に格納する、請求項4記載の方法。
- 代数的な関数に基づいて、同じ振幅の線の、吸気弁ストローク位相差と排気弁ストローク位相差との間に広がる共通の面への投影を実行し、前記線の共通の交点を求める、請求項1から5までのいずれか1項記載の方法。
- 前記方法を、該当するシリーズ生産内燃機関の電子的なプログラミング可能なエンジン制御機器上で実施する、請求項1から6までのいずれか1項記載の方法。
- 制御量または制御ルーチンの整合を、求められた前記吸気弁ストローク位相差および求められた前記排気弁ストローク位相差の修正、または求められた前記吸気弁ストローク位相差および求められた前記排気弁ストローク位相差への整合の主旨で、前記エンジン制御機器上で実行する、請求項7記載の方法。
- 前記選択された信号周波数は、前記シリーズ生産内燃機関の吸気周波数および前記吸気周波数のさらなる倍数を含んでいる、請求項1から8までのいずれか1項記載の方法。
- 吸込み空気の前記動的な圧力振動を、シリーズ生産による、前記空気吸込み路の吸入管における圧力センサを用いて測定する、請求項1から9までのいずれか1項記載の方法。
- 前記クランクシャフト位相角度信号を、クランクシャフトと結合されている歯車およびホールセンサによって求める、請求項1から10までのいずれか1項記載の方法。
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