JP2008168729A - ハイブリッド駆動装置、それを備える車両およびその制御方法 - Google Patents
ハイブリッド駆動装置、それを備える車両およびその制御方法 Download PDFInfo
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- JP2008168729A JP2008168729A JP2007002548A JP2007002548A JP2008168729A JP 2008168729 A JP2008168729 A JP 2008168729A JP 2007002548 A JP2007002548 A JP 2007002548A JP 2007002548 A JP2007002548 A JP 2007002548A JP 2008168729 A JP2008168729 A JP 2008168729A
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Hybrid Electric Vehicles (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Transmission Device (AREA)
Abstract
【解決手段】MG2回転数MRN2を低速段Loに応じた目標回転数(低速段回転数NLG)まで上昇させるために、時刻t4からMG2の出力トルクが増加を開始する。イナーシャ相(期間α)では、変速進行度PRGに応じて決定される第1制限値TLIM1、および余裕回転数NEmgnに応じて決定される第2制限値TLIM2を超えないように、MG2の出力トルクが制限される。イナーシャ相(期間α)の終期では、MG2の出力トルクは十分に小さくなっているため、MG2に対してトルクダウンが実行される時刻t6において生じる出力変動を小さくできる。MG2,MG1のトルクダウンによるエンジン回転数NEの上昇を生じない。
【選択図】図5
Description
図1は、この発明の実施の形態に従うハイブリッド駆動装置1の概略構成図である。
このような高速段Hiから低速段Loへの変速動作におけるトルクダウン制御について以下に説明する。まず、蓄電装置24の充電状態(SOC)が基準値以上に高く、充電が制限される場合であって、トルクダウンによる出力変動が許容されるときの変速制御について説明する。
そこで、本実施の形態に従うハイブリッド駆動装置1では、このような上限回転数NEmaxに対する余裕回転数NEmgnが小さい場合であっても、変速ショックを確実に抑制可能な変速制御を実行する。
図4を参照して、高速段Hiから低速段Loへの変速動作における変速進行度PRGは、MG2回転数MRN2の大きさによって規定される。すなわち、MG2回転数MRN2が高速段回転数NHGであるときに変速進行度PRG=0%とされ、低速段回転数NLGであるときに変速進行度PRG=100%とされる。
次に、上述のような変速制御を実現するための制御構造について説明する。
上述した本実施の形態に従う高速段Hiから低速段Loへの変速動作に係る処理手順をまとめると以下のようになる。
図8を参照して、まず、ステップS100では、エンジン回転数NEの上限回転数NEmaxに対する余裕回転数NEmgnが算出される。続いて、処理はステップS102に進み、余裕回転数NEmgnがしきい値δより小さいか否かが判断される。余裕回転数NEmgnがしきい値δより小さいときには(ステップS102においてYES)、処理はステップS104に進み、トルクダウンによる出力変動が許容されないと判断される。以下、ステップS104以降の処理については、図5を参照しつつ説明する。
図8において、ステップS120のMG1トルクダウンの実行を除いた、ステップS126〜S130,S118からなる一連の処理と同様であるので、詳細な説明は繰返さない。
Claims (8)
- ハイブリッド駆動装置であって、
蓄電装置と電気的に接続される発電機と、
動力源の出力の一部を前記発電機に分配するとともに、残部を回転出力軸に分配する出力分配機構と、
複数の摩擦係合装置の係合および解放の組合せによって、複数の変速比を選択的に形成する変速機構と、
前記蓄電装置と電気的に接続されるとともに、前記変速機構を介して前記回転出力軸と機械的に接続される電動機と、
前記電動機の出力を制御するための電動機制御手段とを備え、
前記電動機制御手段は、第1変速比から前記第1変速比よりも大きな第2変速比への変速動作において、前記電動機の回転数が前記第2変速比に応じた目標値まで上昇するように前記電動機のトルクを制御する第1制御動作を実行するとともに、前記第1制御動作に続いて、前記電動機のトルクを所定値以下に低減する第2制御動作をさらに実行するように構成され、
前記ハイブリッド駆動装置は、さらに
前記蓄電装置の充電制限中に、前記電動機制御手段による前記第2制御動作の実行に伴って、前記発電機の発電量の増加を抑制する発電機制御手段と、
前記蓄電装置の充電制限中に、前記電動機制御手段による前記第2制御動作の実行前に、前記第1制御動作から前記第2制御動作への動作切替によって生じる前記電動機の出力変動が許容されるか否かを判断する判断手段と、
前記判断手段によって前記出力変動が許容されないと判断されると、前記第1制御動作において、前記出力変動が許容される場合に比較して前記電動機のトルクがより小さくなるように制限する制限手段とを備える、ハイブリッド駆動装置。 - 前記判断手段は、前記動力源の許容上限回転数に対する余裕回転数が所定値より小さい時に、前記電動機の出力変動が許容されないと判断する、請求項1に記載のハイブリッド駆動装置。
- 前記制限手段は、前記第1制御動作の進行に伴って、前記電動機のトルクを漸減させる、請求項1または2に記載のハイブリッド駆動装置。
- 前記制限手段は、前記第2変速比に応じた回転数に対する現在の電動機回転数の到達度合に応じて第1制限値を決定し、前記第1制限値を超えないように前記電動機のトルクを制限する、請求項1〜3のいずれか1項に記載のハイブリッド駆動装置。
- 前記制限手段は、前記動力源の許容上限回転数に対する余裕回転数に応じて決定される第2制限値を超えないように、前記電動機の出力を制限する、請求項1〜4のいずれか1項に記載のハイブリッド駆動装置。
- 前記動力源は、内燃機関からなる、請求項1〜5のいずれか1項に記載のハイブリッド駆動装置。
- 請求項1〜6のいずれか1項に記載のハイブリッド駆動装置を備える車両。
- ハイブリッド駆動装置の制御方法であって、
前記ハイブリッド駆動装置は、
蓄電装置と電気的に接続される発電機と、
動力源の出力の一部を前記発電機に分配するとともに、残部を回転出力軸に分配する出力分配機構と、
複数の摩擦係合装置の係合および解放の組合せによって、複数の変速比を選択的に形成する変速機構と、
前記蓄電装置と電気的に接続されるとともに、前記変速機構を介して前記回転出力軸と機械的に接続される電動機とを備え、
前記制御方法は、
第1変速比から前記第1変速比よりも大きな第2変速比への変速動作において、前記電動機の回転数が前記第2変速比に応じた目標値まで上昇するように前記電動機のトルクを制御する第1制御ステップと、
前記第1制御ステップに続いて、前記電動機のトルクを所定値以下に低減する第2制御ステップと、
前記蓄電装置の充電制限中に、前記第2制御ステップの実行に伴う前記発電機の発電量の増加を抑制する第3制御ステップとを含み、
前記第1制御ステップは、
前記蓄電装置の充電制限中に、前記第1制御ステップから前記第2制御ステップへの実行処理によって生じる前記電動機の出力変動が許容されるか否かを判断する第1サブステップと、
前記判断ステップにおいて前記出力変動が許容されないと判断されると、前記出力変動が許容される場合に比較して前記電動機のトルクがより小さくなるように制限する第2サブステップとを含む、ハイブリッド駆動装置の制御方法。
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US12/521,993 US8123654B2 (en) | 2007-01-10 | 2007-12-27 | Hybrid driving apparatus, vehicle with the same and control method of the same |
DE112007003244.8T DE112007003244B4 (de) | 2007-01-10 | 2007-12-27 | Hybridantriebsgerät, Fahrzeug mit dem Antriebsgerät und zugehöriges Steuerungsverfahren |
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