JP2013133101A - 多様なモードを有するハイブリッド車両のev制御を介した燃費向上方法 - Google Patents
多様なモードを有するハイブリッド車両のev制御を介した燃費向上方法 Download PDFInfo
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- 239000000446 fuel Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000002347 injection Methods 0.000 claims abstract description 19
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Abstract
【解決手段】ブレーキが解除されながらAPS入力が印加されるステップと、HCUにより入力分岐モード命令が印加されると第2クラッチCL2が解除されたのか否かをチェックするステップS110と、エンジンの目標RPMを生成するステップS120と、エンジンの目標RPMと実際のエンジンRPMとを比べ、エンジンRPMの差に応じてフィードバック制御及びフィードフォワード制御を介し第1モータートルクを発生させるステップS140と、エンジンRPMが上昇すればインジェクション信号を印加するステップS160と、エンジントルクがHCUのエンジントルク制限量に従い印加されながら始動条件が完了するステップS170と、エンジントルク制限要求情報がない場合、始動完了と認識するステップとを含む。
【選択図】図11
Description
このようなハイブリッド車両は、駆動モーターの動力のみを利用する純粋電気自動車モードであるEV(Electric Vehicle)モードで走行することができる。 そして、EVモードでは、前記駆動モーターがバッテリーの出力電圧で動力を生成する。さらに、ハイブリッド車両は、燃料を介し動力を生成するエンジンの回転力と前記駆動モーターの回転力とを全て動力に利用するHEV(Hybrid Electric Vehicle)モードで走行することができる。さらに、ハイブリッド車両は、車両の制動或いは慣性による走行時、車両の制動及び慣性エネルギーを前記駆動モーターから発電を介して回収し、バッテリーに充電する回生制動(RB:Regenerative Braking)モードで走行することができる。
即ち、前述のHEVシステムは、図1に示す通り、複数のクラッチとブレーキで構成されており、多様な形態のEVを具現することができ、入力分岐に該当する形態で始動をかける場合、第2ブレーキ(BK2)のみ拘束された状態で始動が具現される。
このような走行モードは入力分岐、複合分岐、固定ギア1段、固定ギア2段及び固定ギア3段モードである5種の走行モードに具現される。
しかし、前述した既存の5種の走行モードは入力分岐モードでのみEVが可能であり、残りのモードでEVに進入しようとする場合、必ず入力分岐モードを経てEVに進入することになる問題点があった。
前記第1モータートルクを発生させるステップで第2モーター(MG2)の反力制御は、第1モーター(MG1)トルク量とドライバーの総駆動要求量とにより制限される値が設定されるステップをさらに含み、
前記インジェクション信号を印加するステップでインジェクション信号が入力されるとき、エンジンのトルク上昇を制限するエンジントルク上昇制限が空気量制限と点火制限を同時に行いながら印加されることを特徴とする。
(EV走行及び回生制動)
図2に示す通り、既存のEV制御を行う場合、1つのモーターのみを利用して走行及び回生制動がなされるようにするが、本発明が適用される場合、図3に示す通り、2つのモーター(MG1、MG2)を利用して走行及び回生制動を可能にし、2つのモーターのうち効率がより良好な領域を配分してEV走行及び回生制動の効率を高めることができる。
さらに、2つのモーター(MG1、MG2)のEV走行配分率を調整して既存の第2モーター(MG2)のみを利用したEV走行モードと比較すると、第1モーター(MG1)を含むEVを具現することにより自由度を高めることができる。
図4に示す通り、従来は第1モーター(MG1)を利用して始動を可能とし、特にEV走行モードでは、モードを区分するブレーキ(B2)の油圧が固定された状態で始動させた。即ち、第2モーター(MG2)の起動条件で第1モーター(MG1)を利用してエンジンを始動することになる。
その反面、本発明が適用される場合、図5に示す通り、2種の方式で始動が可能である。即ち、第2ブレーキ(BK2)を固定した状態で第2クラッチ(CL2)を外しながら始動する場合と、第2クラッチ(CL2)を固定した状態で第2ブレーキ(BK2)を外しながら始動する場合とに区分することができる。
図6及び図7に示す通り、ドライバーがブレーキ(BK2)を固定した状態でクラッチ(CL2)を外しながら始動するので、第2モーター(MG2)で駆動されながらハイブリッド制御機(HCU)を介し始動命令が出るとミッション制御機(TCU)で第2クラッチ(CL2)を解除することになり、第2クラッチ(CL2) の解除完了後、エンジンの目標RPMと目標トルクエンジン目標RPMとを追従するため、第1モーター(MG1)の目標RPMと第1モーター(MG1)の目標トルクとを生成して始動する。
前述した内容等を図8及び図9を参照しながらさらに詳しく記述する。先ずブレーキが解除されながらAPS入力が印加され、ハイブリッド制御機(HCU)により入力分岐モード命令が印加(S100)されると、第2クラッチが解除されたか否かをチェックして第2クラッチ(CL2)が解除されたか否かを判断する(S110)。
このとき、エンジン速度が燃料噴射速度より速いか否かを判断し(S150)、判断結果エンジン速度が燃料噴射速度より速ければ燃料噴射を開始して(S160)、エンジントルク要求を制限し(S170)、一定時間冷却水温を考慮してエンジントルクの上昇率を制限する(S180)。
前記APS量に従いEV走行モードの解除可否が決められ、第2モーター(MG2)の反力制御は、第1モーター(MG1)のトルク量とドライバーの総駆動要求量とにより制限される値が設定され、インジェクション信号が入力されるときエンジンのトルク上昇を制限するエンジントルク上昇制限が空気量制限と点火制限を同時に行いながら印加される。
図10及び図11に示す通り、ドライバーがクラッチ(CL2)を固定した状態でブレーキ(BK2)を外しながら始動することになるので、第2モーター(MG2)で駆動されながらハイブリッド制御機(HCU)を介し始動命令が出るとミッション制御機(TCU)で第2クラッチ(CL2)を解除することになり、第2クラッチ(CL2) の解除完了後、エンジンの目標RPMと目標トルクエンジン目標RPMとを追従するため、第1モーター(MG1)の目標RPMと第1モーター(MG1)の目標トルクとを生成して始動する。
入力分岐モードにおける走行モードは、第2ブレーキ(BK2)を固定した状態で走行する場合であって、エンジンRPMを第1モーター(MG1)を利用してFuel Cut状態でエンジンRPMを低減し一定のRPM以下の領域に進入すれば、トランスミッション制御機(TCU)にEV走行モード進入命令を伝達し、トランスミッション制御機(TCU)は第2クラッチ(CL2)の圧力を印加してEV走行モード進入を完了する。
図12及び図13に示す通り、ブレーキが解除されながらAPS入力が印加され、ハイブリッド制御機(HCU)により複合分岐モード命令が印加(S200)されると、第2ブレーキ(BK2)が解除されたのか否かをチェックして第2ブレーキ(BK2)が解除されたのか否かを判断する(S210)。
なお、エンジンの目標RPMを生成し(S220)、エンジンの目標RPMと実際のエンジンRPMとを比べ(S230)、エンジンRPMの差に応じてフィードバック制御及びフィードフォワード制御を介し第1モーター(MG1)トルクが発生するようにする(S240)。
即ち、エンジンRPMが上昇すればインジェクション信号を印加し、エンジントルクがHCUエンジントルク制限量に従い印加されながら始動条件が完了すれば、エンジントルク制限要求情報がない場合始動完了と認識する。
前記APS量に従いEV走行モードの解除可否が決められ、第2モーター(MG2)の反力制御は、第1モーター(MG1)のトルク量とドライバーの総駆動要求量とにより制限される値が設定され、インジェクション信号が入力されるときエンジンのトルク上昇を制限するエンジントルク上昇制限が空気量制限と点火制限を同時に行いながら印加される。
MG2 第2モーター
BK2 第2ブレーキ
CL2 第2クラッチ
Claims (5)
- ブレーキが解除されながらAPS入力が印加されるステップと、
ハイブリッド制御機(HCU)により入力分岐モード命令が印加されると第2クラッチが解除されたのか否かをチェックするステップと、
第2クラッチが解除されたのか否かを判断するステップと、
エンジンの目標RPMを生成するステップと、
エンジンの目標RPMと実際のエンジンRPMとを比べ、エンジンRPMの差に応じてフィードバック制御及びフィードフォワード制御を介し第1モータートルクを発生させるステップと、
エンジンRPMが上昇すればインジェクション信号を印加するステップと、
エンジントルクがハイブリッド制御機のエンジントルク制限量に従い印加されながら始動条件が完了するステップと、
エンジントルク制限要求情報がない場合、始動完了と認識するステップと、
を含むことを特徴とする多様なモードを有するハイブリッド車両のEV制御を介した燃費向上方法。 - ブレーキが解除されながらAPS入力が印加されるステップと、
ハイブリッド制御機(HCU)により複合分岐モード命令が印加されると第2ブレーキ(BK2)が解除されたのか否かをチェックするステップと、
第2ブレーキが解除されたのか否かを判断するステップと、
エンジンの目標RPMを生成するステップと、
エンジンの目標RPMと実際のエンジンRPMとを比べ、エンジンRPMの差に応じてフィードバック制御及びフィードフォワード制御を介し第1モータートルクを発生させるステップと、
エンジンRPMが上昇すればインジェクション信号を印加するステップと、
エンジントルクがハイブリッド制御機(HCU)のエンジントルク制限量に従い印加されながら始動条件が完了するステップと、
エンジントルク制限要求情報がない場合、始動完了と認識するステップと、
を含むことを特徴とする多様なモードを有するハイブリッド車両のEV制御を介した燃費向上方法。 - 前記チェックするステップで、APS量に従いEV走行モードの解除可否が決められるステップをさらに含むことを特徴とする請求項1又は2に記載の多様なモードを有するハイブリッド車両のEV制御を介した燃費向上方法。
- 前記第1モータートルクを発生させるステップで第2モーター(MG2)の反力制御は、第1モーター(MG1)トルク量とドライバーの総駆動要求量とにより制限される値が設定されるステップをさらに含むことを特徴とする請求項1又は2に記載の多様なモードを有するハイブリッド車両のEV制御を介した燃費向上方法。
- 前記インジェクション信号を印加するステップでインジェクション信号が入力されるとき、エンジンのトルク上昇を制限するエンジントルク上昇制限が空気量制限と点火制限を同時に行いながら印加されることを特徴とする請求項1又は2に記載の多様なモードを有するハイブリッド車両のEV制御を介した燃費向上方法。
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