JP2017035922A - 車両の駆動装置 - Google Patents
車両の駆動装置 Download PDFInfo
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- JP2017035922A JP2017035922A JP2015156854A JP2015156854A JP2017035922A JP 2017035922 A JP2017035922 A JP 2017035922A JP 2015156854 A JP2015156854 A JP 2015156854A JP 2015156854 A JP2015156854 A JP 2015156854A JP 2017035922 A JP2017035922 A JP 2017035922A
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- engine
- electrical machine
- rotating electrical
- control
- rotational speed
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- 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
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- Y10S903/00—Hybrid electric vehicles, HEVS
- Y10S903/902—Prime movers comprising electrical and internal combustion motors
- Y10S903/903—Prime movers comprising electrical and internal combustion motors having energy storing means, e.g. battery, capacitor
- Y10S903/904—Component specially adapted for hev
- Y10S903/909—Gearing
- Y10S903/91—Orbital, e.g. planetary gears
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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
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- Y10S903/902—Prime movers comprising electrical and internal combustion motors
- Y10S903/903—Prime movers comprising electrical and internal combustion motors having energy storing means, e.g. battery, capacitor
- Y10S903/93—Conjoint control of different elements
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- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S903/00—Hybrid electric vehicles, HEVS
- Y10S903/902—Prime movers comprising electrical and internal combustion motors
- Y10S903/903—Prime movers comprising electrical and internal combustion motors having energy storing means, e.g. battery, capacitor
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Abstract
Description
図1は、本実施の形態による車両1の全体ブロック図である。車両1は、エンジン100と、第1MG(Motor Generator)200と、動力分割機構300と、第2MG400と、出力軸560と、駆動輪82と、PCU(Power Control Unit)600と、バッテリ700と、SMR(System Main Relay)710と、ECU(Electronic Control Unit)1000と、を備える。
図4は、第1MG200の制御モードを概略的に説明する図である。本実施の形態による車両1では、第1MG200の制御モードを、パルス幅変調(Pulse Width Modulation、以下「PWM」ともいう)制御モードおよび矩形波制御モードのいずれかに切り替える。
次に、バッテリレス走行制御について説明する。ECU1000は、バッテリ700に異常が発生した場合、SMR710を開いてバッテリ700を電気システム(第1MG200、第2MG400およびPCU600)から切り離し、下記のバッテリレス走行制御を実行する。
ECU1000は、S03、S04にてエンジンF/B制御を実行する。
上記の式(1)において、「θth(n)」は今回の演算サイクルにおけるスロットル開度θth、「θth(n−1)」は前回の演算サイクルにおけるスロットル開度θth、「K」はフィードバックゲイン(比例ゲイン)である。
ECU1000は、S05〜S07にてパワー収支制御を実行する。なお、パワー収支制御は、エンジンF/B制御とは独立して行なわれる。したがって、図6には、エンジンF/B制御を実行した後にパワー収支制御が実行される例が示されているが、エンジンF/B制御およびパワー収支制御を実行する順序は逆であってもよい。
Tm1req×Nm1+Tm2req×Nm2=0 …(3)
バッテリレス走行制御中(前進中)においては、後述の図7に示すように、エンジン100は正回転状態となり、第1MG200は正回転状態となって発電トルク(負方向のトルク)を発生し、第2MG400は正回転状態となって放電トルク(正方向のトルク)を発生する。そのため、式(2)、(3)において、「Tm1req」は負の値となり、「Nm1」、「Tm2req」および「Nm2」は正の値となる。
バッテリレス走行制御中において、エンジン回転速度Neが目標回転速度Nereqよりも高い側に乖離している状態で駆動力を発生させようとすると、エンジンF/B制御によるエンジントルクTeの低下とパワー収支制御による第1MG200の発電トルクの発生とによってエンジン回転速度Neが落ち込み、電力収支のバランスが破綻することが懸念される。
上述の実施の形態1においては、バッテリレス走行制御中において要求駆動力Preqの上限値を小さい値に設定することによって駆動力を制限した。しかしながら、要求駆動力Preqの制限手法はこれに限定されるものではない。たとえば、要求駆動力Preqそのものを低下させることによって駆動力を制限するようにしてもよい。
上述の実施の形態1においては、バッテリレス走行制御中にエンジン回転速度Neが目標回転速度Nereqよりも高い側に乖離した場合に、パワー収支制御に用いられる要求駆動力Preqを制限することによってエンジン回転速度Neの落ち込みを防止した。
上述の実施の形態2においては、バッテリレス走行制御中において、エンジン回転速度Neが目標回転速度Nereqよりも高い側に乖離した場合に、エンジンF/B制御の作用を制限することによってエンジン回転速度Neの落ち込みを防止した。
[実施の形態4]
上述の実施の形態3においては、第1MG200の制御モードが矩形波制御モードであるか否かに応じて、エンジンF/B制御の作用を制限するのか、それとも要求駆動力Preqを制限するのかを選択した。
Claims (3)
- 車両の駆動装置であって、
エンジンと、
第1回転電機と、
駆動輪に接続された第2回転電機と、
前記エンジンに接続された回転要素と前記第1回転電機に接続された回転要素と前記第2回転電機に接続された回転要素とを有し、前記第2回転電機の回転速度が一定であるときに前記エンジンおよび前記第1回転電機の一方の回転速度が低下すると他方の回転速度が低下するように前記エンジン、前記第1回転電機および前記第2回転電機を機械的に接続する遊星歯車装置と、
前記第1回転電機および前記第2回転電機に電気的に接続可能に構成されたバッテリと、
前記バッテリが異常である場合に前記バッテリを前記第1回転電機および前記第2回転電機から切り離してバッテリレス走行制御を実行するように構成された制御装置とを備え、
前記バッテリレス走行制御は、前記エンジンの回転速度が目標回転速度になるように前記エンジンをフィードバック制御するエンジンフィードバック制御と、要求駆動力に対応するパワーが前記駆動輪に伝達され、かつ前記第1回転電機が発電するパワーと前記第2回転電機が消費するパワーとが等しくなるように前記第1回転電機および前記第2回転電機を制御するパワー収支制御とを実行する制御であり、
前記制御装置は、前記バッテリレス走行制御中において、前記エンジンの回転速度が前記目標回転速度よりも高いしきい速度よりも高い場合、前記エンジンの回転速度が前記しきい速度よりも低い場合に比べて前記パワー収支制御に用いられる前記要求駆動力を小さい値に設定する、車両の駆動装置。 - 前記第1回転電機は、前記第1回転電機の回転速度が所定値よりも低い場合はパルス幅変調制御モードで制御され、前記第1回転電機の回転速度が前記所定値よりも高い場合は矩形波制御モードで制御され、
前記制御装置は、前記バッテリレス走行制御中において、前記エンジンの回転速度が前記しきい速度よりも高くかつ前記第1回転電機が前記矩形波制御モードで制御されている場合、前記エンジンの回転速度が前記しきい速度よりも低い場合に比べて前記要求駆動力を小さい値に設定し、前記エンジンの回転速度が前記しきい速度よりも高くかつ前記第1回転電機が前記パルス幅変調制御モードで制御されている場合、前記エンジンの回転速度が前記しきい速度よりも低い場合に比べて前記エンジンフィードバック制御に用いられるゲインを低減する処理および前記目標回転速度を増加させる処理の少なくとも一方の処理を行なう、請求項1に記載の車両の駆動装置。 - 車両の駆動装置であって、
エンジンと、
第1回転電機と、
駆動輪に接続された第2回転電機と、
前記エンジンに接続された回転要素と前記第1回転電機に接続された回転要素と前記第2回転電機に接続された回転要素とを有し、前記第2回転電機の回転速度が一定であるときに前記エンジンおよび前記第1回転電機の一方の回転速度が低下すると他方の回転速度が低下するように前記エンジン、前記第1回転電機および前記第2回転電機を機械的に接続する遊星歯車装置と、
前記第1回転電機および前記第2回転電機に電気的に接続可能に構成されたバッテリと、
前記バッテリが異常である場合に前記バッテリを前記第1回転電機および前記第2回転電機から切り離してバッテリレス走行制御を実行するように構成された制御装置とを備え、
前記バッテリレス走行制御は、前記エンジンの回転速度が目標回転速度になるように前記エンジンをフィードバック制御するエンジンフィードバック制御と、要求駆動力に対応するパワーが前記駆動輪に伝達され、かつ前記第1回転電機が発電するパワーと前記第2回転電機が消費するパワーとが等しくなるように前記第1回転電機および前記第2回転電機を制御するパワー収支制御とを実行する制御であり、
前記制御装置は、前記バッテリレス走行制御中において、前記エンジンの回転速度が前記目標回転速度よりも高いしきい速度よりも高くかつ前記要求駆動力がしきい駆動力よりも大きい場合、前記エンジンの回転速度が前記しきい速度よりも低い場合および前記要求駆動力が前記しきい駆動力よりも小さい場合の少なくとも一方の場合に比べて前記エンジンフィードバック制御に用いられるゲインを低減する処理および前記目標回転速度を増加させる処理の少なくとも一方の処理を行なう、車両の駆動装置。
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