JPWO2009069637A1 - ハイブリッドシステムの制御方法 - Google Patents
ハイブリッドシステムの制御方法 Download PDFInfo
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- JPWO2009069637A1 JPWO2009069637A1 JP2009543820A JP2009543820A JPWO2009069637A1 JP WO2009069637 A1 JPWO2009069637 A1 JP WO2009069637A1 JP 2009543820 A JP2009543820 A JP 2009543820A JP 2009543820 A JP2009543820 A JP 2009543820A JP WO2009069637 A1 JPWO2009069637 A1 JP WO2009069637A1
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- Prior art keywords
- torque
- engine
- map
- accelerator opening
- hybrid system
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- 238000000034 method Methods 0.000 title claims description 62
- 230000005540 biological transmission Effects 0.000 claims description 29
- 230000008569 process Effects 0.000 claims description 26
- 230000008859 change Effects 0.000 claims description 14
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 230000007935 neutral effect Effects 0.000 claims description 6
- 230000035939 shock Effects 0.000 abstract description 9
- 230000007704 transition Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 239000007858 starting material Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
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Abstract
Description
12 内燃エンジン
14 スターターモータ
16 ニュートラル/フォワードクラッチ要素
17 第1の駆動系
18 自動変速式トランスミッション(AT)
20L、20R 前輪
22L,22R 後輪
24 バッテリ
26 メインモータ
27 第2の駆動系
28 差動ギア
30 トルクコンバータ
31 AT入力シャフト
38 エンジンコントローラ
44 ATコントローラ
46 インバータ
48 バッテリコントローラ
50 ハイブリッドコントローラ
52 駆動トルク・出力要求値計算手段
54 バッテリSOC判断手段
56 電動走行(E-drive)モード制御指令発生手段
58 ハイブリッド走行(HEV-drive)モード制御指令発生手段
60 エンジンスタートストップモード制御指令発生手段
62 クラッチ締結モード・AT変速モード制御指令発生手段
64 アクセル開度センサ
66 車速センサ
67 AT入力速度センサ
68 エンジン回転速度センサ
70 状態マップ
80、82、84 変速ライン
86 擬似アクセル開度信号のライン
88 エンジントルク指令に対応した擬似アクセル開度信号の曲線
(1)式が成立しない場合、即ちエンジン速度Idとエンジン目標アイドリング速度I0との間で有意な差がある場合(ステップ138否定判定)、クラッチ要素16を開放した状態で(ステップ140)、エンジン12のエンジン目標アイドリング速度I0への追従制御を続行し(ステップ146)、ステップ134に戻り同様の処理を再度実行する。
ここで、nは与えられた定数である。
(1)ATコントローラ44は、図6に示す変速比マップに基づいて、通常、ATコントローラ44へと送られてきたアクセル開度と車速とから変速比を決定している。図6の変速比マップによれば、トランスミッションは、車速Vがライン80より低速であれば1速、ライン80から82の間では2速、ライン82から84の間では3速、ライン84以上では4速へと切り替え制御される。ライン80、82、84は、右肩上りの傾斜の部分を有するので、この区間では、アクセル開度が上昇するほど、変速時の車速も上昇する。逆に云えば、アクセル開度が0に近くなると、より低速の車速でも高速のギアレシオに切り替えられることになる。
(2)ハイブリッド走行モードに移行した後、図3のステップ122で、アクセル開度Aに対応するトルクがTm/maxレベル1を超えた場合(ステップ122の否定判定)、エンジンの目標トルクTe*が(A−Tm/maxレベル1)に設定される(ステップ130)。このとき、クラッチ締結モード・AT変速モード制御指令発生手段62は、この目標トルクTe*に対応する値を擬似アクセル開度信号としてATコントローラ44に入力する。例えば、図7に示されるように、この擬似アクセル開度信号は曲線88に示すように制御される。ライン86から曲線88への切替の時点が、ステップ130の実行時点に対応している。これによって、実際のエンジン出力に見合った変速状態を実現し、スムーズにハイブリッド走行に移行することができる。
(3)上記項目(1)において、クラッチ要素16を締結してフォワード状態に変更する際、事前に、始動の終了したエンジンにおいて、その時のトランスミッション18のギアレシオ情報と車速情報とに基づいて、トランスミッション入力シャフト31の回転速度を予測しておき、この予測値にエンジンアイドリング回転速度を近づける制御を行う。その後で、クラッチ要素16をフォワード状態に変更することにより、ショックを低減することができる。例えば図3のステップ156で、エンジンアイドリング回転速度の目標値I0にαを加算することによって、上記予測値に近づけるようにすることができる。
Claims (11)
- ハイブリッドシステムの制御方法であって、
前記ハイブリッドシステムは、
内燃エンジンと、
前記内燃エンジンの回転速度を変速して出力するための変速手段と、
駆動輪を電動駆動するための電動手段と、
前記電動手段のためのバッテリと、
前記内燃エンジン及び前記電動手段の目標トルクを決定するためのマップを有し、該マップに基づいて前記内燃エンジン及び前記電動手段を指令制御するための制御手段と、を備え、
前記マップには、少なくとも車両速度及びバッテリ充電状態の関数として前記電動手段が供給可能な上限トルクを画定する最大トルク線と、該最大トルク線よりも所定のマージン低いマージントルク線とが定義されており、
前記制御方法は、
アクセル開度、車両速度及びバッテリ充電状態を検出し、
検出されたアクセル開度、車両速度及びバッテリ充電状態によって定まる前記マップ上の位置が、前記マージントルク線より下のトルク位置にあるとき、前記電動手段による電動走行を行い、
前記マップ上の位置が前記マージントルク線以上のトルク位置となったとき、ハイブリッド走行に移行するため前記エンジンの始動処理を開始し、
前記マップ上の位置が前記最大トルク線を超えるトルク位置となったとき、検出されたアクセル開度に対応するトルクを達成するため前記エンジンの目標トルク及び前記電動手段の目標トルクを各々設定し、前記エンジン及び前記電動手段を指令制御する、各工程を備える、方法。 - 前記変速手段は、前記変速手段の入力シャフトと接続されたクラッチ要素を備え、該クラッチ要素の締結及び開放によって、前記変速手段のフォワード状態及びニュートラル状態を切り替えることを可能にする、請求項1に記載のハイブリッドシステムの制御方法。
- 前記エンジンの始動処理を開始する前記工程では、前記クラッチ要素を開放した状態で前記エンジンの始動処理が実行される、請求項2に記載のハイブリッドシステムの制御方法。
- 前記エンジンの始動処理を開始した後、前記エンジンのアイドリング回転速度と前記変速手段の入力シャフト速度とが所定の範囲内に近づいたとき、前記クラッチ要素を締結させる工程を更に備える、請求項3に記載のハイブリッドシステムの制御方法。
- 前記電動走行では、前記エンジンを停止させ、前記クラッチ要素を開放した状態で、検出されたアクセル開度に対応するトルクを目標トルクとして前記電動手段を指令制御する、請求項2に記載のハイブリッドシステムの制御方法。
- 前記マップ上の位置が前記マージントルク線と前記最大トルク線との間のトルク位置であるとき、前記エンジンの始動処理が終了した後、前記エンジンの目標トルクを0に設定する工程を更に備える、請求項3に記載のハイブリッドシステムの制御方法。
- 前記マップ上の位置が前記マージントルク線と前記最大トルク線との間のトルク位置であるとき、前記クラッチ要素の締結処理の終了した後にも、前記エンジンの目標トルクを0に設定する工程を更に備える、請求項1に記載のハイブリッドシステムの制御方法。
- 前記エンジン及び前記電動手段を指令制御する前記工程は、前記電動手段の目標トルクを前記最大トルク線に一致する最大値に設定し、検出されたアクセル開度に対応する車両駆動要求トルクを達成するため前記エンジンの目標トルクを前記車両駆動要求トルクから前記電動手段の最大トルクを差し引いてなる値に設定する、請求項1に記載のハイブリッドシステムの制御方法。
- 前記ハイブリッドシステムは、アクセル開度及び車両速度をベースとする第2のマップを用いて決定された変速比で前記変速手段を制御するための変速比制御手段を更に備え、
前記制御方法は、前記エンジンが停止中で且つ前記電動手段がトルクを発生している際に、前記第2のマップを擬似的にアクセル開度0又は0に近い値を入力して得られる変速マップとする工程を更に備える、請求項5に記載のハイブリッドシステムの制御方法。 - 前記ハイブリッドシステムは、アクセル開度及び車両速度をベースとする第2のマップを用いて決定された変速比で前記変速手段を制御するための変速比制御手段を更に備え、
前記制御方法は、前記マップ上の位置が前記最大トルク線を超えるトルク位置となったとき、前記第2のマップを、アクセル開度の値に代えて擬似的に前記エンジンへのトルク指令値を入力して得られる変速マップとする工程を備える、請求項1に記載のハイブリッドシステムの制御方法。 - 前記クラッチ要素が締結される前に、前記変速手段のギアレシオ情報と前記車両速度とに基づいて、前記変速手段の入力シャフトの回転速度を予測し、予測された該回転速度に前記エンジンのアイドリング回転速度を近づける制御を実行する工程を更に備える、請求項4に記載のハイブリッドシステムの制御方法。
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CN101878142A (zh) | 2010-11-03 |
US20100312422A1 (en) | 2010-12-09 |
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CN101878142B (zh) | 2014-03-12 |
WO2009069637A1 (ja) | 2009-06-04 |
JP5134632B2 (ja) | 2013-01-30 |
US8649924B2 (en) | 2014-02-11 |
EP2226227A4 (en) | 2013-04-17 |
KR20100086043A (ko) | 2010-07-29 |
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