JP2021062650A - 車両用駆動装置 - Google Patents
車両用駆動装置 Download PDFInfo
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Abstract
Description
本発明の実施の形態について、図1乃至図4を参照して説明する。なお、以下に説明する実施の形態は、本発明を実施する上での好適な具体例として示すものであり、技術的に好ましい種々の技術的事項を具体的に例示している部分もあるが、本発明の技術的範囲は、この具体的態様に限定されるものではない。
図1は、本発明の実施の形態に係る駆動装置が搭載された4輪駆動車の概略の構成例を示す模式図である。この4輪駆動車1は、主駆動輪である左右の前輪101,102が主駆動源としてのエンジン11の駆動力によって駆動され、補助駆動輪である左右の後輪103,104が補助駆動源としての電動モータ2を有する駆動装置10によって駆動される。
図2は、駆動装置10の構成例を示す断面図である。図2では、図面左側が4輪駆動車1における車両左側にあたり、図面右側が4輪駆動車1における車両右側にあたる。ハウジング5は、第1乃至第5のハウジング部材51〜55を有しており、これらのハウジング部材51〜55が複数のボルトによって相互に固定されている。
図3は、油圧ユニット6の構成例を模式的に示す構成図である。油圧ユニット6は、制御装置7から供給される電流に応じたトルクを発生するポンプ用モータ61と、ポンプ用モータ61に連結軸62によって連結された油圧ポンプ63と、リリーフ弁64と、第1及び第2の制御弁65,66とを有している。油圧ポンプ63は、ポンプ用モータ61に駆動され、作動油をリザーバ60から汲み上げて吐出する。リリーフ弁64は、吐出された作動油の一部をリザーバ60に還流させる固定絞り弁である。
次に、制御装置7が実行する制御処理について説明する。ここでは、制御処理に用いられる変数T、T1、T2、Ta、Tb、R1、R2を下記のように定義する。
T:入力回転部材40に入力されるトルク
T1:第1の多板クラッチ43により伝達可能なトルクの最大値
T2:第2の多板クラッチ44により伝達可能なトルクの最大値
Ta:第1の出力回転部材41から出力すべきトルク(第1の指令出力トルク)
Tb:第2の出力回転部材42から出力すべきトルク(第2の指令出力トルク)
R1:第1の出力回転部材41の回転速度
R2:第2の出力回転部材42の回転速度
T<T1+T2・・・(1)
T=Ta+Tb・・・(2)
T1>Ta ・・・・・(3)
T2>Tb ・・・・・(4)
T=Ta+Tb・・・(5)
T1=Ta ・・・・・(6)
T2>Tb ・・・・・(7)
T2=Tb ・・・・・(8)
T1>Ta ・・・・・(9)
T=Ta+Tb・・・(10)
T1>Ta ・・・・・(11)
T2>Tb ・・・・・(12)
以上説明した本発明の実施の形態によれば、第1の多板クラッチ43及び第2の多板クラッチ44のうち、少なくとも何れかの多板クラッチではクラッチプレート間の滑りが生じないようにすることができるので、第1の多板クラッチ43の複数の第1の入力クラッチプレート431及び第1の出力クラッチプレート432、ならびに第2の多板クラッチ44の複数の第2の入力クラッチプレート441及び第2の出力クラッチプレート432の摩耗を抑制することができ、駆動装置10の耐久性を高めることが可能となる。
以上、本発明を実施の形態に基づいて説明したが、この実施の形態は特許請求の範囲に係る発明を限定するものではない。また、実施の形態の中で説明した特徴の組合せの全てが発明の課題を解決するための手段に必須であるとは限らない点に留意すべきである。
2…電動モータ 4…駆動力配分装置
40…入力回転部材 41…第1の出力回転部材
42…第2の出力回転部材 43…第1の多板クラッチ
44…第2の多板クラッチ 45…第1の押圧機構
46…第2の押圧機構 7…制御装置
Claims (5)
- 電動モータと、入力される駆動力を配分して出力する駆動力配分装置と、前記電動モータ及び前記駆動力配分装置を制御する制御装置と、を備えた車両用駆動装置であって、
前記駆動力配分装置は、前記電動モータの駆動力を受ける入力回転部材と、前記入力回転部材と同軸上で相対回転可能な第1及び第2の出力回転部材と、前記入力回転部材と前記第1の出力回転部材との間に配置された第1の多板クラッチと、前記入力回転部材と前記第2の出力回転部材との間に配置された第2の多板クラッチと、前記第1の多板クラッチを押圧する第1の押圧機構と、前記第2の多板クラッチを押圧する第2の押圧機構とを備え、
前記制御装置は、前記入力回転部材に入力されるトルクをTとし、前記第1の多板クラッチにより伝達可能なトルクの最大値をT1とし、前記第2の多板クラッチにより伝達可能なトルクの最大値をT2としたとき、下記式(1)を満たすように前記電動モータならびに前記第1及び第2の押圧機構を制御する、
車両用駆動装置。
T<T1+T2・・・(1) - 前記制御装置は、車両情報に基づいて前記第1及び第2の出力回転部材のそれぞれから出力すべきトルクを演算し、前記第1の出力回転部材から出力すべきトルクが前記第2の出力回転部材から出力すべきトルクよりも大きいとき、下記式(2)及び(3)を満たすように前記電動モータならびに前記第1及び第2の押圧機構を制御し、前記第2の出力回転部材から出力すべきトルクが前記第1の出力回転部材から出力すべきトルクよりも大きいとき、下記式(2)及び(4)を満たすように前記電動モータならびに前記第1及び第2の押圧機構を制御する、
請求項1に記載の車両用駆動装置。
T=Ta+Tb・・・(2)
T1>Ta ・・・・・(3)
T2>Tb ・・・・・(4)
ただし、Taは前記第1の出力回転部材から出力すべきトルクを表し、Tbは前記第2の出力回転部材から出力すべきトルクを表す。 - 前記制御装置は、前記第1の出力回転部材の回転速度と前記第2の出力回転部材の回転速度とが異なるとき、前記第1及び第2の多板クラッチのうち何れか一方の多板クラッチに滑りを発生させないように前記電動モータならびに前記第1及び第2の押圧機構を制御する、
請求項1に記載の車両用駆動装置。 - 前記制御装置は、車両情報に基づいて前記第1及び第2の出力回転部材のそれぞれから出力すべきトルクを演算し、
前記第1の出力回転部材の回転速度が前記第2の出力回転部材の回転速度よりも低いとき、下記式(5)(6)及び(7)を満たすように前記電動モータならびに前記第1及び第2の押圧機構を制御し、
前記第2の出力回転部材の回転速度が前記第1の出力回転部材の回転速度よりも低いとき、下記式(5)(8)及び(9)を満たすように前記電動モータならびに前記第1及び第2の押圧機構を制御する、
請求項3に記載の車両用駆動装置。
T=Ta+Tb・・・(5)
T1=Ta ・・・・・(6)
T2>Tb ・・・・・(7)
T2=Tb ・・・・・(8)
T1>Ta ・・・・・(9)
ただし、Taは前記第1の出力回転部材から出力すべきトルクを表し、Tbは前記第2の出力回転部材から出力すべきトルクを表す。 - 前記制御装置は、車両情報に基づいて前記第1及び第2の出力回転部材のそれぞれから出力すべきトルクを演算し、
前記第1の出力回転部材の回転速度と前記第2の出力回転部材の回転速度とを同一の回転速度にする場合又は同一の回転速度に維持する場合、下記式(10)乃至(12)を満たすように前記電動モータならびに前記第1及び第2の押圧機構を制御する、
請求項1乃至4の何れか1項に記載の車両用駆動装置。
T=Ta+Tb・・・(10)
T1>Ta ・・・・・(11)
T2>Tb ・・・・・(12)
ただし、Taは前記第1の出力回転部材から出力すべきトルクを表し、Tbは前記第2の出力回転部材から出力すべきトルクを表す。
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