JP6785986B2 - 内燃機関の弁駆動装置において生じている偏差を監視する方法および当該方法を実施する電子的なエンジン制御機器 - Google Patents
内燃機関の弁駆動装置において生じている偏差を監視する方法および当該方法を実施する電子的なエンジン制御機器 Download PDFInfo
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Description
VhP_Aww=ΔEVH−ΔEVH_Refまたは
VhP_Aww=ΔAVH−ΔAVH_Refまたは
VhP_Aww=((ΔEVH+ΔAVH)/2)−ΔVH_Ref
に即した差分形成によって行うことができる。対応する弁ストローク位相基準値ΔVH_Ref,ΔEVH_Ref,ΔAVH_Refは例えば、内燃機関の最初の運転開始時に求められ、内燃機関のエンジン制御機器の電子的な記憶ユニット内に格納されている値である。
NwW_Aww=ΔENW−ΔENW_Refまたは
NwW_Aww=ΔANW−ΔANW_Refまたは
NwW_Aww=((ΔENW+ΔANW)/2)−ΔVH_Ref
に従った差分形成によって行うことができる。
Claims (9)
- 内燃機関の弁駆動装置において生じている偏差を識別する方法であって、
吸気弁ストローク位相差(ΔEVH)および/または排気弁ストローク位相差(ΔAVH)が、該当する前記内燃機関(1)の空気吸込み路における吸込み空気の動的な圧力振動の分析を用いて、動作中に求められ、ここから弁ストローク位相偏差値(VhP_Aww)が、弁ストローク位相基準値(ΔVH_Ref)に関して求められ、
前記弁ストローク位相偏差値(VhP_Aww)に基づいて第1の弁駆動装置偏差値(VT_Aww_1)が求められ、
付加的に、吸気側カムシャフト角度差(ΔENW)および/または排気側カムシャフト角度差(ΔANW)が、クランクシャフト位置センサ(41)および吸気側カムシャフト位置センサ(42a)および/または排気側カムシャフト位置センサ(42b)の装置によって、動作中に求められ、ここから、第2の弁駆動装置偏差値(VT_Aww_2)が求められ、
前記第1の弁駆動装置偏差値および前記第2の弁駆動装置偏差値が、相互の妥当性検査のために相互に比較され、弁駆動装置偏差比較値(ΔVT_Aww)が形成される、
ことを特徴とする、内燃機関の弁駆動装置において生じている偏差を識別する方法。 - 前記弁駆動装置偏差比較値(ΔVT_Aww)が、所定の弁駆動装置偏差比較閾値(ΔVT_Aww_Gw)を上回らない限り、前記第1の弁駆動装置偏差値および/または前記第2の弁駆動装置偏差値が妥当であると評価される、請求項1記載の方法。
- 前記弁駆動装置偏差比較値(ΔVT_Aww)が、定められている弁駆動装置偏差比較閾値(ΔVT_Aww_Gw)を少なくとも一度上回るとすぐに、機能不良(VT_Ffkt)が、前記弁駆動装置の領域において識別される、請求項1記載の方法。
- 前記第1の弁駆動装置偏差値および/または前記第2の弁駆動装置偏差値(VT_Aww_1,VT_Aww_2)が妥当であると評価され、かつ所定の弁駆動装置偏差閾値(VT_Aww_Gw)を上回らない限り、前記内燃機関(1)の制御のための、補償を行う、制御技術的な修正措置(Ktr_Mssn)および/または障害メッセージ(Info_Sig)が、前記内燃機関(1)の制御ユニット(50)を用いて引き起こされ、
前記第1の弁駆動装置偏差値および/または前記第2の弁駆動装置偏差値(VT_Aww_1,VT_Aww_2)が妥当であると評価され、かつ所定の弁駆動装置偏差閾値(VT_Aww_Gw)を上回っている場合、または既に事前に機能不良(VT_Ffkt)が、前記弁駆動装置の領域において識別されている場合には、前記内燃機関の緊急作動または緊急停止および/または障害メッセージが、前記内燃機関(1)の制御ユニット(50)によって引き起こされる、請求項2または3記載の方法。 - 前記第1の弁駆動装置偏差値および/または前記第2の弁駆動装置偏差値(VT_Aww_1,VT_Aww_2)は、前記内燃機関(1)の動作中、継続的に求められ、ここから、時間にわたった、前記第1の弁駆動装置偏差値および/または前記第2の弁駆動装置偏差値(VT_Aww_1,VT_Aww_2)の各偏差経過が作成され、
前記各偏差経過に基づいて、前記弁駆動装置における偏差の特定の原因が識別される、請求項1記載の方法。 - 前記偏差経過の値が継続的に上昇する場合には、前記弁駆動装置における偏差の、摩擦に起因する原因が識別され、前記原因は、前記弁駆動装置の構成に応じて、チェーンの伸び、歯付きベルトの伸びまたは歯車の摩擦に相当し、
前記偏差経過の値が跳躍的に上昇する場合には、前記弁駆動装置における偏差の、歯の飛びに起因する原因が識別される、請求項5記載の方法。 - 内燃機関の弁駆動装置において生じている偏差を識別する方法であって、
吸気弁ストローク位相差(ΔEVH)および/または排気弁ストローク位相差(ΔAVH)が、該当する前記内燃機関(1)の空気吸込み路における吸込み空気の動的な圧力振動の分析を用いて、動作中に求められ、ここから弁ストローク位相偏差値(VhP_Aww)が、弁ストローク位相基準値(ΔVH_Ref)に関して求められ、
前記弁ストローク位相偏差値(VhP_Aww)に基づいて第1の弁駆動装置偏差値(VT_Aww_1)が求められ、
前記内燃機関の前記吸気弁ストローク位相差および/または前記排気弁ストローク位相差を動作中に求めるために、
測定された前記圧力振動から、対応する圧力振動信号が作成され、同時にクランクシャフト位相角度信号が求められ、
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、前記測定された圧力振動の、少なくとも1つの選択された信号周波数の位相位置および/または振幅が求められ、
前記各選択された信号周波数の、求められた前記位相位置および/または前記振幅に基づいて、それぞれ、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に関連している、前記各同じ信号周波数の同じ位相位置および/または同じ振幅の線が、前記各信号周波数の同じ位相位置および/または同じ振幅の基準線を用いて求められ、
同じ位相位置および/または同じ振幅の求められた線の各共通の交点が求められ、
求められた前記共通の交点から、前記吸気弁ストローク位相差および/または前記排気弁ストローク位相差が決定される、方法。 - 前記方法は、電子的な計算ユニット(53)上で実施され、前記計算ユニットは、前記内燃機関(1)の電子的な、プログラミング可能なエンジン制御機器(50)に割り当てられており、かつこれと、機能的に接続された状態にある、請求項1から7までのいずれか1項記載の方法。
- 内燃機関を制御する、電子的な、プログラミング可能なエンジン制御機器(50)であって、割り当てられた電子的な計算ユニット(53)と、割り当てられた電子的な記憶ユニット(54)とを有している、電子的な、プログラミング可能なエンジン制御機器(50)において、
前記電子的な計算ユニット(53)および前記電子的な記憶ユニット(54)は、請求項1から8までのいずれか1項に記載されている方法を実施し、前記エンジン制御機器によって、前記内燃機関(1)を相応に制御するように構成されている、
ことを特徴とする、電子的な、プログラミング可能なエンジン制御機器(50)。
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