JP5622055B2 - ハイブリッド車の制御装置 - Google Patents
ハイブリッド車の制御装置 Download PDFInfo
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- JP5622055B2 JP5622055B2 JP2012148138A JP2012148138A JP5622055B2 JP 5622055 B2 JP5622055 B2 JP 5622055B2 JP 2012148138 A JP2012148138 A JP 2012148138A JP 2012148138 A JP2012148138 A JP 2012148138A JP 5622055 B2 JP5622055 B2 JP 5622055B2
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- Prior art keywords
- power
- energization
- ehc
- limit value
- power limit
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- 239000003054 catalyst Substances 0.000 claims description 70
- 238000002485 combustion reaction Methods 0.000 claims description 34
- 238000005485 electric heating Methods 0.000 claims description 34
- 230000005611 electricity Effects 0.000 claims 2
- 238000000034 method Methods 0.000 description 23
- 230000008569 process Effects 0.000 description 21
- 238000010438 heat treatment Methods 0.000 description 13
- 230000006866 deterioration Effects 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
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- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
- F01N3/2026—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Exhaust Gas After Treatment (AREA)
- Hybrid Electric Vehicles (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Description
このようなハイブリッド車においては、内燃機関の排出ガスを浄化する触媒としてバッテリの電力で加熱可能な電気加熱触媒を搭載し、内燃機関の始動前(例えばモータジェネレータの動力のみで走行するEV走行中)に、バッテリの電力で電気加熱触媒を加熱し、電気加熱触媒の温度が活性温度に達して電気加熱触媒の暖機が完了した後に、内燃機関を始動することで、内燃機関の始動時の排出ガス浄化率を高めるようにしたものがある。
まず、図1に基づいてハイブリッド車の駆動システムの概略構成を説明する。内燃機関であるエンジン10と第1のモータジェネレータ(以下「第1のMG」と表記する)11と第2のモータジェネレータ(以下「第2のMG」と表記する)12が搭載され、主にエンジン10と第2のMG12が車輪13を駆動する動力源となる。エンジン10のクランク軸と第1のMG11の回転軸と第2のMG12の回転軸とが動力分割機構14(例えば遊星ギヤ機構)を介して連結され、第2のMG12の回転軸が減速ギヤ機構15を介して車軸16に連結されている。
Pehcmax=Wout −Pstart −Phoki−Prun
図2に示すEHC通電制御ルーチンは、ECU28の電源オン中に所定周期で繰り返し実行される。本ルーチンが起動されると、まず、ステップ101で、EHC22の通電加熱要求が発生しているか否かを、例えば、エンジン停止中(例えば停車中又はEV走行中)で且つEHC22の暖機要求が発生しているか否かによって判定する。
Pehcmax=Wout −Pstart −Phoki−Prun
これらのステップ103〜107等の処理が特許請求の範囲でいう通電電力制限値算出手段としての役割を果たす。
Pehc =Pehctgt
Pehc =Pehcmax
この後、ステップ111に進み、設定した通電電力Pehc となるようにEHC制御装置23内のスイッチング回路を駆動してEHC22に通電するEHC通電処理を実行する。
これらのステップ108〜116等の処理が特許請求の範囲でいう通電制御手段としての役割を果たす。
EHC22の通電加熱要求が発生した時点t0 で、バッテリ出力電力制限値Wout からエンジン始動電力Pstart と補機消費電力Phokiと走行要求パワーPrun とを差し引いてEHC通電電力制限値Pehcmaxを求める。
Pehcmax=Wout −Pstart −Phoki−Prun
Pehcmax=Wout −Phoki−Prun
P0 =Wout −Pstart −Phoki−Prun
Claims (6)
- 車両の動力源として内燃機関(10)及びモータジェネレータ(12)と、前記モータジェネレータ(12)と電力を授受するバッテリ(18)と、前記内燃機関(10)の排出ガスを浄化する触媒として前記バッテリ(18)の電力で加熱可能な電気加熱触媒(22)とを備え、前記内燃機関(10)を停止した状態で前記モータジェネレータ(12)の動力で走行するEV走行が可能なハイブリッド車の制御装置において、
前記内燃機関(10)の停止中に、前記内燃機関(10)の始動に必要な電力と補機駆動に必要な電力のうちの少なくとも一方と、前記バッテリ(18)の出力電力制限値と、走行に必要な電力とに基づいて、前記電気加熱触媒(22)の通電電力制限値を算出する通電電力制限値算出手段(28)と、
前記通電電力制限値に基づいて前記電気加熱触媒(22)の通電を制御する通電制御手段(28)と
を備え、
前記通電制御手段(28)は、前記電気加熱触媒(22)の通電電力を前記通電電力制限値と所定の通電電力目標値のうちの小さい方の値に設定して前記電気加熱触媒(22)の通電を制御することを特徴とするハイブリッド車の制御装置。 - 前記通電電力制限値算出手段(28)は、前記バッテリ(18)の出力電力制限値から前記内燃機関(10)の始動に必要な電力と前記補機駆動に必要な電力と前記走行に必要な電力とを差し引いて前記通電電力制限値を求めることを特徴とする請求項1に記載のハイブリッド車の制御装置。
- 前記通電制御手段(28)は、前記通電電力制限値が0以下の場合に、前記電気加熱触媒(22)の通電を停止して前記内燃機関(10)を始動することを特徴とする請求項2に記載のハイブリッド車の制御装置。
- 前記通電電力制限値算出手段(28)は、前記バッテリ(18)の出力電力制限値から前記補機駆動に必要な電力と前記走行に必要な電力とを差し引いて前記通電電力制限値を求めることを特徴とする請求項1に記載のハイブリッド車の制御装置。
- 前記通電電力制限値算出手段(28)は、前記バッテリ(18)の出力電力制限値から前記内燃機関(10)の始動に必要な電力と前記補機駆動に必要な電力と前記走行に必要な電力とを差し引いて前記電気加熱触媒(22)の通電停止判定値を求め、
前記通電制御手段(28)は、前記通電停止判定値が0以下の場合に、前記電気加熱触媒(22)の通電を停止して前記内燃機関(10)を始動することを特徴とする請求項4に記載のハイブリッド車の制御装置。 - 前記通電制御手段(28)は、前記電気加熱触媒(22)の温度が目標触媒温度よりも高い場合に、前記電気加熱触媒(22)の通電を停止することを特徴とする請求項1乃至5のいずれかに記載のハイブリッド車の制御装置。
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