JP2017061259A - ハイブリッド車両 - Google Patents
ハイブリッド車両 Download PDFInfo
- Publication number
- JP2017061259A JP2017061259A JP2015188192A JP2015188192A JP2017061259A JP 2017061259 A JP2017061259 A JP 2017061259A JP 2015188192 A JP2015188192 A JP 2015188192A JP 2015188192 A JP2015188192 A JP 2015188192A JP 2017061259 A JP2017061259 A JP 2017061259A
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- ecu
- power
- voltage
- engine
- torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/44—Series-parallel type
- B60K6/442—Series-parallel switching type
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
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- B60K6/445—Differential gearing distribution type
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- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
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Abstract
【解決手段】HV−ECU310とMG−ECU320との間に通信異常が発生すると、インバータ221,222をゲート遮断状態として、エンジンによって回転されたモータジェネレータ10に生じる制動トルクを用いて車両の駆動トルクを確保する、インバータレス走行が実行される。MG−ECU320は、通信異常によるインバータレス走行時には、コンバータ210によりシステム電圧VHを予め定められた電圧V1に制御する。HV−ECU310は、通信異常によるインバータレス走行中において、車両の走行状態に関する検出値と電圧V1からバッテリ150の想定電力範囲を設定し、バッテリ150の電圧VBおよび電流IBからの実績電力が、想定電力範囲から外れている場合には、走行停止処理を実行する。
【選択図】図2
Description
図1は、本実施の形態に係るハイブリッド車両の全体構成を概略的に示すブロック図である。
図2は、車両1の電気システムおよびECU300の構成を説明するための回路ブロック図である。図1および図2を参照して、PCU200は、コンデンサC1と、コンバータ210と、コンデンサC2と、インバータ221,222と、電圧センサ230と、電流センサ241,242とを含む。ECU300は、HV−ECU310と、MG−ECU320と、エンジンECU330とを含む。
ECU300は、通常走行モードと退避走行モードのいずれかの制御モードで車両1を走行させることができる。
図3を参照して、インバータレス走行中においては、MG−ECU320からのゲート遮断信号SDN1,SDN2に応答して、インバータ221,222はゲート遮断される。これにより、インバータ221,222の各スイッチング素子Q3〜Q8,Q9〜Q14(図2)がオフ状態とされる。ゲート遮断状態において、インバータ221ではダイオードD3〜D8の導通による電流経路のみが形成される。この結果、インバータ221では三相全波整流回路が形成される。同様に、インバータ222においても、ダイオードD9〜D14によって三相全波整流回路が形成される。
一方、図5に示されるように、エンジン回転数Neと、モータジェネレータ10の回転数Nm1およびモータジェネレータ20の回転数Nm2との間には、遊星歯車装置30でのギヤ比ρを用いて、下記式(2)に示す関係が成立する。
式(2)の関係を用いることにより、上記式(1)は、下記式(3),(4)に示されるように、エンジン回転数Neの制御範囲を規定するように、変形することができる。
ただし、Ne1=(VH/Kc)×ρ/(1+ρ)+Nm2/(1+ρ) …(4)
したがって、HV−ECU310は、アクセルオフ時(Acc=0)には、上記式(3)で規定される制御範囲内(−Ne1〜Ne1)に収まるように、目標エンジン回転数Ne*を設定する。なお、式(4)のNe1の算出に必要な回転数Nm2は、レゾルバ422による検出値の他、車速センサ513によって検出された車速SPからの算出値によっても求めることができる。
なお、式(5)中において、回転数アップ量ΔNeは、アクセル操作量Accに所定の係数α(α>0)を乗じた値とすることができる。(ΔNe=α・Acc)。
インバータレス走行は、モータジェネレータ10,20の制御系における故障発生のみならず、HV−ECU310およびMG−ECU320間での通信異常が発生した場合にも適用される。この場合には、ドライバ操作に基づく動作指令をMG−ECU320に伝達してモータジェネレータ10,20を制御することができなくなるからである。一方で、HV−ECU310およびエンジンECU330の間の通信が正常であれば、エンジン100の制御によってインバータレス走行を実行することができる。
図10を参照して、バッテリ電力想定範囲ARは、バッテリ予測電力Pbeを含む電力範囲として設定される。たとえば、バッテリ電力想定範囲ARは、バッテリ予測電力Pbeに対して所定のマージンを設けるように設定される。このとき、バッテリ電力想定範囲ARの上限値Pbuおよび下限値Pblは、Pbu=Pbe+α、Pbl=Pbe−αでそれぞれ表される。
一般的に、インバータレス走行中においては、モータジェネレータ10が回転により過熱状態となると、車両1の走行が停止される。たとえば、温度センサ251によって検出されたモータ温度Tm1が上限温度T1よりも上昇すると、インバータレス走行を停止することができる。
上述のように、インバータレス走行での制限車速SPmaxを、SP=SmaxにおけるNm2<N2となるように設計すれば、図8に示したように、モータジェネレータ10の逆起トルクTcのみからバッテリ予測電力Pbeを推定することが可能である。一方で、上記のような設計ができなかった場合、または、SP>Smaxの状態で通信異常が発生した場合には、モータジェネレータ20での逆起トルクTmも考慮して、バッテリ予測電力Pbeを算出することが必要である。
Claims (2)
- エンジンと、
ロータに永久磁石を有する第1の回転電機と、
駆動輪に接続された出力軸と、
前記エンジン、前記第1の回転電機のロータおよび前記出力軸を機械的に連結し、前記第1の回転電機、前記エンジンおよび前記出力軸の間でトルクを伝達可能な遊星歯車装置と、
前記出力軸に接続されたロータを有する第2の回転電機と、
再充電可能な蓄電装置と、
前記蓄電装置の電圧および電流を検出するための監視ユニットと、
前記蓄電装置と電力線との間で双方向の直流電圧変換を実行するコンバータと、
前記電力線と前記第1の回転電機との間に接続された第1のインバータと、
前記電力線と前記第2の回転電機との間に接続された第2のインバータと、
前記エンジンの動作を制御する第1の制御装置と、
前記第1および第2のインバータによって前記第1および第2の回転電機を制御するとともに、前記コンバータによって前記電力線の電圧を制御するための第2の制御装置とを備え、
車両走行は、
前記第1および第2のインバータをゲート遮断状態として、前記エンジンの出力によって機械的に回転させられた前記第1の回転電機が発電する際に出力する制動トルクの反力として前記出力軸に作用するトルクによって車両の駆動トルクを確保するインバータレス走行が実行される退避走行モードを有し、
前記ゲート遮断状態において、前記第1および第2のインバータでは、各スイッチング素子はオフ状態に維持されて、前記各スイッチング素子の逆並列ダイオードによる電流経路が形成され、
前記第1の制御装置は、前記第2の制御装置との間の通信異常を検知すると、前記インバータレス走行を実行するために前記エンジンの回転数を制御し、
前記第2の制御装置は、前記第1の制御装置との間の通信異常を検知すると、前記インバータレス走行を実行するために、前記第1および第2のインバータを前記ゲート遮断状態にするとともに、前記電力線の電圧を予め定められた第1の電圧に制御するように前記コンバータの動作を制御し、
前記第1の制御装置は、前記インバータレス走行中において、前記蓄電装置の電圧および電流から算出された実績電力が想定電力範囲から外れると車両走行を停止し、
前記想定電力範囲は、前記蓄電装置の予測入出力電力を含む電力範囲として設定され、
前記予測入出力電力は、前記第1の電圧、車両速度の検出値から換算された前記第2の回転電機の回転数、前記エンジンの回転数の検出値、および、前記遊星歯車装置でのギヤ比を用いて求められる、ハイブリッド車両。 - 前記第1の制御装置は、前記第2の制御装置との間の通信異常時においても、前記第1の回転電機の温度に関する情報を検知可能に構成され、
前記想定電力範囲の上限電力値は、前記第1の回転電機の温度が所定温度以上であるときには、前記所定温度よりも低いときと比較して、前記蓄電装置の充電電力が減少する側に設定される、請求項1記載のハイブリッド車両。
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