JP6136896B2 - 電動機制御装置 - Google Patents
電動機制御装置 Download PDFInfo
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- JP6136896B2 JP6136896B2 JP2013246490A JP2013246490A JP6136896B2 JP 6136896 B2 JP6136896 B2 JP 6136896B2 JP 2013246490 A JP2013246490 A JP 2013246490A JP 2013246490 A JP2013246490 A JP 2013246490A JP 6136896 B2 JP6136896 B2 JP 6136896B2
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Description
前記駆動軸に入力される入力トルクの平均値を推定する駆動軸入力トルク推定手段を更に備え、前記補正手段は、前記推定された入力トルクの平均値が所定値以下であり、且つ前記トルク指令値の平均値が前記トルク指令値の振幅未満である場合に、前記トルク指令値の平均値と逆符号の値が前記少なくとも一つの電動機に指令されないように前記トルク指令値を補正する。
本発明では、例えばメモリ、プロセッサ等を備えてなる駆動軸入力トルク推定手段は、駆動軸に入力される入力トルクの平均値を推定する。尚、入力トルクの推定方法には、公知の各種態様を適用可能であるので、その詳細についての説明はここでは割愛する。
補正手段は、推定された入力トルクの平均値が所定値以下であり、且つトルク指令値の平均値がトルク指令値の振幅未満である場合、トルク指令値の平均値と逆符号の値が電動機に指令されないようにトルク指令値を補正する。
ここで、本願発明者の研究によれば、以下の事項が判明している。即ち、制振制御に係る設定値と実際の車両の状態との間にずれが生じていない場合であっても、例えば自動変速機が高速ギアに設定されている時に要求駆動力が小さくアクセル開度が比較的小さい場合や、アクセルが一旦オフされた後にアクセルが緩やかに再度オンされた場合、駆動力が0Nm付近に滞留又は0Nmをよぎる。この場合に、電動機から出力されるトルクが0Nmをまたぐと、例えば意図しない車両振動や異音が生じる可能性がある。
「推定された入力トルクの平均値が所定値以下である」場合とは、上記のような駆動力が0Nm付近に滞留又は0Nmをよぎる場合を意味する。尚、「所定値」は、経験的若しくは実験的に、又はシミュレーションによって、例えば入力トルクと、0Nmをまたぐトルクが電動機から出力された場合の車両の挙動(例えば車両振動が生じるか否か)との関係から、例えば意図しない車両振動や異音が生じる範囲を求め、該求められた範囲の境界値に対応する入力トルクとして、又は該入力トルクより所定値だけ大きい値として設定すればよい。
このように構成すれば、推定された入力トルクの平均値が所定値以下であり、且つトルク指令値の平均値がトルク指令値の振幅未満である場合に、補正手段により、トルク指令値の平均値と逆符号の値が電動機に指令されないようにトルク指令値が補正されるので、制振制御により電動機から出力されるトルクに起因する、例えば意図しない車両振動や異音を抑制することができる。
先ず、実施形態に係る電動機制御装置が搭載される車両の構成について、図1を参照して説明する。図1は、実施形態に係る電動機制御装置を搭載するハイブリッド自動車の要部を示す概念図である。
ECU100は、上述の如く、モータ・ジェネレータMG1及びMG2を夫々制御するが、ここでは特に、トルク脈動成分に起因して駆動軸17に生じる振動を抑制するためのモータ・ジェネレータMG2の制御について説明する。
次に、実施形態に係る電動機制御装置の変形例について説明する。
Claims (3)
- 駆動軸に夫々動力伝達可能に接続された内燃機関及び少なくとも一つの電動機を備える車両に搭載され、前記内燃機関の機関トルクの脈動成分を低減する補償トルクを算出する補償トルク算出手段と、前記少なくとも一つの電動機の要求トルクと前記算出された補償トルクとが合成された値を、前記少なくとも一つの電動機のトルク指令値として前記少なくとも一つの電動機に指令する指令手段と、を備える電動機制御装置であって、
前記駆動軸に入力される入力トルクの平均値を推定する駆動軸入力トルク推定手段と、
前記推定された入力トルクの平均値が所定値以下であり、且つ前記トルク指令値の平均値が前記トルク指令値の振幅未満である場合に、前記トルク指令値の平均値と逆符号の値が前記少なくとも一つの電動機に指令されないように前記トルク指令値を補正する補正手段と、
を備えることを特徴とする電動機制御装置。 - 前記補正手段は、
前記補正前のトルク指令値の平均値が正の値である場合、前記トルク指令値が零未満とならないように前記トルク指令値を補正し、
前記補正前のトルク指令値の平均値が負の値である場合、前記トルク指令値が零より大きくならないように前記トルク指令値を補正する
ことを特徴とする請求項1に記載の電動機制御装置。 - 前記補償トルク算出手段は、前記補償トルクの位相を、前記少なくとも一つの電動機のうち、前記駆動軸までの動力伝達経路において最も下流に配置された電動機の回転数変動が最小となる位相とすることを特徴とする請求項1又は2に記載の電動機制御装置。
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US15/038,920 US9718460B2 (en) | 2013-11-28 | 2014-11-18 | Control device for hybrid vehicle |
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