JP6304165B2 - ハイブリッド車両の制御装置 - Google Patents
ハイブリッド車両の制御装置 Download PDFInfo
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- JP6304165B2 JP6304165B2 JP2015152892A JP2015152892A JP6304165B2 JP 6304165 B2 JP6304165 B2 JP 6304165B2 JP 2015152892 A JP2015152892 A JP 2015152892A JP 2015152892 A JP2015152892 A JP 2015152892A JP 6304165 B2 JP6304165 B2 JP 6304165B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2300/00—Purposes or special features of road vehicle drive control systems
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- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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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
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Description
(1)前記車両の位置を示す位置情報及び道路情報を取得し(ステップ605)、
(2)前記位置情報及び前記道路情報に基づいて前記車両の走行予定経路を決定し(ステップ605)、
(3)前記道路情報であって前記走行予定経路を構成する道路区間に関する道路情報に基づいて同走行予定経路内の所定の条件を満たす対象下り坂区間を探索し(ステップ615及びステップ620)、
(4)前記対象下り坂区間が前記走行予定経路に含まれている場合には同対象下り坂区間の開始地点(Dk)よりも所定の第1距離だけ手前にある下り坂制御開始地点(Ds)から同対象下り坂区間の終了地点(De)までの区間である制御対象区間を決定する(ステップ630及びステップ635)。
前記制御対象区間を前記車両が走行するとき、前記目標残容量(SOCcntr)を前記標準残容量(SOCcntr-n)よりも小さい第1残容量(SOCcntr-d)に変更する(ステップ720、ステップ915)下り坂制御を実行する(図7のフローチャートを参照。)。
前記下り坂制御を実行している期間中に前記制御対象区間を新たに決定する場合であっても、前記車両が、前記下り坂制御を開始した制御対象区間の終了地点を通過するまでは前記下り坂制御を継続するように構成されている(ステップ610での「No」との判定、及び、図8のフローチャートを参照。)。
(構成)
本発明の第1実施形態に係るハイブリッド車両の制御装置(以下、「第1装置」と称呼する。)は、図1に示したハイブリッド車両10(以下、単に「車両」とも称呼する。)に適用される。
ブレーキ操作量センサ83は、運転者により操作される図示しないブレーキペダルの操作量BPを表す出力信号を発生するようになっている。
車速センサ84は、ハイブリッド車両10の車速SPDを表す出力信号を発生するようになっている。
次に、図2及び図3を参照しながら、本制御装置のPMECU70及びNVECU74等が行う「下り坂制御」について説明する。
図2及び図3の横軸は車両10の走行予定経路の地点を距離に応じて示す。図2に示した例においては、走行予定経路は、リンク#0からリンク#5に対応する6つの道路区間が含まれている。隣接するリンク同士の接続点はノードである。図2及び図3の縦軸は車両10の走行予定経路における道路の標高及び蓄電池64のSOCである。
(2)第1リンク群の各リンクに対応する区間が何れも所定閾値勾配未満の下り勾配を有する。
(3)第1リンク群の開始地点の標高Hsが第1リンク群の終了地点の標高Heよりも高く(Hs>He)、且つ、その差の絶対値(標高差ΔHa=|Hs−He|)が所定標高差(SOC_STL_H)以上である。
(4)第1リンク群に対応する区間の合計距離ΔDaが所定距離(SOC_STL_D)以上である。
例えば、図3に示されるように、車両10が対象下り坂区間の途中である地点D7を走行しているときに走行予定経路及び下り坂探索の更新タイミング(例えば、VICS情報が更新されるタイミング)が到来すると、NVECU74は走行予定経路の決定及び下り坂探索を再度行う。つまり、NVECU74は対象下り坂区間を新たに探索し特定(決定、更新)する。
次に、第1装置の実際の作動について説明する。
NVECU74(実際にはそのCPU)は、一定時間(例えば、VICS情報が更新されるインターバルである5分)が経過する毎に図6にフローチャートにより示した支援計画決定ルーチンを実行するようになっている。従って、NVECU74は所定のタイミングにてステップ600から処理を開始してステップ605に進み、車両10の現在の位置、目的地及び最新の道路情報等を取得し、それらとNVDB86に記憶されている地図情報とに基づいて、車両10の走行予定経路を決定する。
PMECU70(実際はそのCPU)は、下り坂制御を実行するため図7にフローチャートにより表された「下り坂制御ルーチン」を所定の時間が経過する毎に実行する。従って、適当なタイミングとなると、PMECU70は、図7のステップ700から処理を開始してステップ705に進み、PMECU70のRAM内に下り坂制御区間の開始地点Ds及び終了地点Deの少なくとも一方が格納されているか否かを判定する。
NVECU74(実際にはそのCPU)は、十分に短い一定時間(例えば、1s)が経過する毎に図8にフローチャートにより示した探索不要フラグ決定ルーチンを実行するようになっている。従って、NVECU74は所定のタイミングにてステップ800から処理を開始してステップ810に進み、現時点において図7のステップ720に示した下り坂制御が実行中であるか否かを判定する。即ち、NVECU74は、PMECU70に対し、下り坂制御の開始を指示する信号を送った後であって未だ下り坂制御の終了を指示する信号を送っていない段階であるか否かを判定する。
PMECU70(実際にはそのCPU)は、十分に短い一定時間(例えば、8ms)が経過する毎に図9にフローチャートにより示した車両走行制御ルーチンを実行するようになっている。従って、PMECU70は所定のタイミングにてステップ900から処理を開始してステップ905に進み、ユーザ要求トルクTuをアクセル操作量AP及び車速に基づいて取得するとともに、ユーザ要求トルクTuに車速SPDを乗じることにより車両要求出力Pv*(ユーザ要求出力Pu*)を取得する。
更に、PMECU70は、図示しないルーチンを実行することにより、アクセル(アクセルペダル)操作量APが「0」であるとき、ブレーキペダルの操作量BPに基づいて、車両10に要求される要求制動力を決定する。そして、PMECU70は、その要求制動力を要求回生制動力と要求摩擦制動力とに分配し、要求回生制動力が回生制動により発生するように第2発電電動機MG2を制御するとともに、要求摩擦制動力が図示しない摩擦ブレーキ装置により発生するように図示しない油圧ブレーキアクチュエータを制御する。なお、PMECU70は、残容量SOCが残容量上限値SOCuplmt を超えない範囲で、できるだけ要求回生制動力が大きくなるように要求回生制動力を決定する。
本発明の第2実施形態に係るハイブリッド車両の制御装置(以下、「第2装置」と称呼する。)は、NVECU74(実際にはそのCPU)が、図6のルーチンを、一定時間が経過する毎に実行するだけではなく、車両10が対象制御区間の終了地点(対象下り坂区間の終了地点)Deを通過した時点にても直ちに実行する点のみにおいて、第1装置と相違している。
(2)PMECU70が、図6のルーチンの一部又は全部を実行してもよい。その場合、PMECU70はNVECU74から必要な情報を取得すればよい。更に、PMECU70が、図6のルーチンのステップ610以降の処理を実行する場合、NVECU74は下り坂制御の開始及び終了を指示する信号をPMECU70に送る必要は特にない。
(5)PMECU70又はNVECU74は、下り坂制御の実行中に対象下り坂区間及び制御対象区間の探索を行ってもよい。但し、その場合であっても、車両10が下り坂制御を開始した制御対象区間を引き続き走行する予定である場合、下り坂制御を車両10が下り坂制御の制御対象区間の終了地点Deに到達するまで継続する。
Claims (3)
- 車両の駆動源としての内燃機関及び同駆動源としての電動機、並びに、前記電動機に電力を供給する蓄電池を搭載し、前記電動機を用いて回生制動を行うとともに同回生制動により発生した電力を前記蓄電池に充電可能であり且つ前記内燃機関の出力を用いて発電した電力を前記蓄電池に充電可能に構成されたハイブリッド車両に適用され、
前記車両に要求される要求駆動力を満たすように且つ前記蓄電池の残容量が標準残容量に設定された目標残容量に近付くように前記内燃機関及び前記電動機を制御する制御部を備えるハイブリッド車両の制御装置であって、
前記制御部は、
前記車両の位置を示す位置情報及び道路情報を取得し、
前記位置情報及び前記道路情報に基づいて前記車両の走行予定経路を決定し、
前記道路情報であって前記走行予定経路を構成する道路区間に関する道路情報に基づいて同走行予定経路内の所定の条件を満たす対象下り坂区間を探索し、
前記対象下り坂区間が前記走行予定経路に含まれている場合には同対象下り坂区間の開始地点よりも所定の第1距離だけ手前にある下り坂制御開始地点から同対象下り坂区間の終了地点までの区間である制御対象区間を決定し、
前記制御対象区間を前記車両が走行するとき、前記目標残容量を前記標準残容量よりも小さい第1残容量に変更する下り坂制御を実行し、
且つ、
前記下り坂制御を実行している期間中に前記制御対象区間を新たに決定する場合であっても、前記車両が、前記下り坂制御を開始した制御対象区間の終了地点を通過するまでは前記下り坂制御を継続するように構成された、
ハイブリッド車両の制御装置。 - 請求項1に記載のハイブリッド車両の制御装置において、
前記制御部は、
前記車両が前記下り坂制御を開始した制御対象区間の終了地点を通過した時点にて前記制御対象区間を新たに決定するように構成された、
ハイブリッド車両の制御装置。 - 請求項1に記載のハイブリッド車両の制御装置において、
前記制御部は、
前記下り坂制御を実行している期間中に前記走行予定経路が変化した場合には、前記下り坂制御を直ちに終了するように構成された、
ハイブリッド車両の制御装置。
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