JP7371573B2 - 車両用駆動装置 - Google Patents
車両用駆動装置 Download PDFInfo
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- JP7371573B2 JP7371573B2 JP2020094621A JP2020094621A JP7371573B2 JP 7371573 B2 JP7371573 B2 JP 7371573B2 JP 2020094621 A JP2020094621 A JP 2020094621A JP 2020094621 A JP2020094621 A JP 2020094621A JP 7371573 B2 JP7371573 B2 JP 7371573B2
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Classifications
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Description
車両の前輪及び後輪を駆動するための車両用駆動装置であって、
前記前輪及び前記後輪のうち、一方を第1車輪とし、他方を第2車輪として、
前記車両が備える内燃機関に駆動連結される入力部材、及び第1駆動力源を備え、前記第1車輪を駆動する第1駆動ユニットと、
第2駆動力源を備え、前記第2車輪を駆動する第2駆動ユニットと、
前記第1駆動ユニット、前記第2駆動ユニット、及び前記内燃機関を制御する制御装置と、を備え、
前記第1駆動力源は、蓄電装置との間で電力の授受を行う回転電機であり、
前記第1駆動ユニットは、動作モードとして、第1モードと、第2モードと、を備え、
前記第1モードでは、前記内燃機関と前記第1車輪との間での動力伝達が遮断された状態、かつ、前記第1駆動力源と前記第1車輪との間での動力伝達が行われる状態となり、
前記第2モードでは、前記内燃機関と前記第1駆動力源との間での動力伝達が行われる状態、かつ、前記内燃機関及び前記第1駆動力源の双方と前記第1車輪との間での動力伝達が遮断された状態であって、前記内燃機関から伝達される駆動力により前記第1駆動力源が発電を行う状態となり、
前記制御装置は、
前記蓄電装置の充電量が規定の第1閾値未満であって、前記車両の速度が規定の第2閾値未満である場合において、
前記車両の速度が零以上であって、前記車両に要求される駆動力である要求駆動力が零以上の場合には、前記第1駆動ユニットの前記動作モードを前記第2モードとして、前記第2駆動ユニットにより前記要求駆動力を出力するように制御し、
前記車両の速度が零より大きく、前記要求駆動力が零未満の場合には、前記第1駆動ユニットの前記動作モードを前記第1モードとして、前記第1駆動力源に回生による発電を行わせると共に、前記内燃機関を動作状態とし、前記第1駆動ユニット及び前記第2駆動ユニットの双方により前記要求駆動力を出力するように制御する点にある。
また、制御装置は、蓄電装置の充電量が第1閾値未満であって、車両の速度が第2閾値未満である場合において、車両が減速しようとしている場合には、第1駆動ユニットの動作モードを第1モードとして、第1駆動力源に回生による発電を行わせると共に、内燃機関を動作状態とし、第1駆動ユニット及び第2駆動ユニットの双方により要求駆動力を出力するように制御する。そのため、車両の慣性力を用いて第1駆動力源により発電を行うことができる。またこの際に内燃機関を停止させずに動作状態としているので、車両の減速が終了した後には早期に第1駆動ユニットの動作モードを第2モードに移行して蓄電装置の充電を継続することもできる。よって、車両の減速中に、減速終了後のモード移行を迅速に行うことが可能な状態で、適切に蓄電装置の充電を行うことができる。
以上のように、本構成によれば、車両の停車中、並びに比較的低速で走行している車両の一定速度での走行中、加速中、及び減速中のそれぞれにおいて、蓄電装置の充電を適切に行うことができる。したがって、蓄電装置の充電量を十分に確保することができる。
(1)上記の実施形態では、第1駆動ユニット100Aが、動作モードとして、eTCモード、EVモード(第1EVモード及び第2EVモード)、HVモード(第1HVモード及び第2HVモード)、及び充電モードを備えた構成を例として説明した。しかし、そのような構成に限定されることはない。第1駆動ユニット100Aは、少なくともEVモードと充電モードとを備えていれば良い。したがって、eTCモードを備えず、或いは、HVモードを備えず、或いはeTCモード及びHVモードの双方を備えていない構成としても良い。なお、eTCモードを備えない場合、分配用差動歯車機構SPが設けられていなくても良い。
以下では、上記において説明した車両用駆動装置(100)の概要について説明する。
車両の前輪及び後輪を駆動するための車両用駆動装置(100)であって、
前記前輪及び前記後輪のうち、一方を第1車輪(W1)とし、他方を第2車輪(W2)として、
前記車両が備える内燃機関(EG)に駆動連結される入力部材(I)、及び第1駆動力源(D1)を備え、前記第1車輪(W1)を駆動する第1駆動ユニット(100A)と、
第2駆動力源(D2)を備え、前記第2車輪(W2)を駆動する第2駆動ユニット(100B)と、
前記第1駆動ユニット(100A)、前記第2駆動ユニット(100B)、及び前記内燃機関(EG)を制御する制御装置(10)と、を備え、
前記第1駆動力源(D1)は、蓄電装置(BT)との間で電力の授受を行う回転電機(MG1)であり、
前記第1駆動ユニット(100A)は、動作モードとして、第1モードと、第2モードと、を備え、
前記第1モードでは、前記内燃機関(EG)と前記第1車輪(W1)との間での動力伝達が遮断された状態、かつ、前記第1駆動力源(D1)と前記第1車輪(W1)との間での動力伝達が行われる状態となり、
前記第2モードでは、前記内燃機関(EG)と前記第1駆動力源(D1)との間での動力伝達が行われる状態、かつ、前記内燃機関(EG)及び前記第1駆動力源(D1)の双方と前記第1車輪(W1)との間での動力伝達が遮断された状態であって、前記内燃機関(EG)から伝達される駆動力により前記第1駆動力源(D1)が発電を行う状態となり、
前記制御装置(10)は、
前記蓄電装置(BT)の充電量が規定の第1閾値(TH1)未満であって、前記車両の速度(V)が規定の第2閾値(TH2)未満である場合において、
前記車両の速度(V)が零以上であって、前記車両に要求される駆動力である要求駆動力(Tr)が零以上の場合には、前記第1駆動ユニット(100A)の前記動作モードを前記第2モードとして、前記第2駆動ユニット(100B)により前記要求駆動力(Tr)を出力するように制御し、
前記車両の速度(V)が零より大きく、前記要求駆動力(Tr)が零未満の場合には、前記第1駆動ユニット(100A)の前記動作モードを前記第1モードとして、前記第1駆動力源(D1)に回生による発電を行わせると共に、前記内燃機関(EG)を動作状態とし、前記第1駆動ユニット(100A)及び前記第2駆動ユニット(100B)の双方により前記要求駆動力(Tr)を出力するように制御する。
また、制御装置(10)は、蓄電装置(BT)の充電量が第1閾値(TH1)未満であって、車両の速度(V)が第2閾値(TH2)未満である場合において、車両が減速しようとしている場合には、第1駆動ユニット(100A)の動作モードを第1モードとして、第1駆動力源(D1)に回生による発電を行わせると共に、内燃機関(EG)を動作状態とし、第1駆動ユニット(100A)及び第2駆動ユニット(100B)の双方により要求駆動力(Tr)を出力するように制御する。そのため、車両の慣性力を用いて第1駆動力源(D1)により発電を行うことができる。またこの際に内燃機関(EG)を停止させずに動作状態としているので、車両の減速が終了した後には早期に第1駆動ユニット(100A)の動作モードを第2モードに移行して蓄電装置(BT)の充電を継続することもできる。よって、車両の減速中に、減速終了後のモード移行を迅速に行うことが可能な状態で、適切に蓄電装置(BT)の充電を行うことができる。
以上のように、本構成によれば、車両の停車中、並びに比較的低速で走行している車両の一定速度での走行中、加速中、及び減速中のそれぞれにおいて、蓄電装置(BT)の充電を適切に行うことができる。したがって、蓄電装置(BT)の充電量を十分に確保することができる。
前記第3モードでは、前記内燃機関(EG)及び前記第1駆動力源(D1)の双方と前記第1車輪(W1)との間での動力伝達が行われる状態となり、
前記制御装置(10)は、前記蓄電装置(BT)の充電量が前記第1閾値(TH1)未満であって、前記車両の速度(V)が前記第2閾値(TH2)以上である場合に、前記第1駆動ユニット(100A)の前記動作モードを前記第3モードとして、前記第1駆動力源(D1)に回生による発電を行わせると共に、前記第1駆動ユニット(100A)と前記第2駆動ユニット(100B)とを合わせて前記要求駆動力(Tr)を出力するように制御すると好適である。
前記第1車輪(W1)に駆動連結される出力部材(O1)と、
回転速度の順に、第1回転要素(E1)、第2回転要素(E2)、及び第3回転要素(E3)を備えた分配用差動歯車機構(SP)と、を更に備え、
前記第1回転要素(E1)は、前記入力部材(I)に駆動連結され、
前記第2回転要素(E2)は、前記出力部材(O1)に駆動連結され、
前記第3回転要素(E3)は、前記第1駆動力源(D1)に駆動連結され、
前記第1駆動ユニット(100A)は、前記動作モードとして、前記分配用差動歯車機構(SP)を介して前記第1駆動力源(D1)の駆動力と前記内燃機関(EG)の駆動力とを合わせて前記第2回転要素(E2)から前記出力部材(O1)に出力する第4モードを更に備え、
前記制御装置(10)は、
前記蓄電装置(BT)の充電量が前記第1閾値(TH1)未満であって、前記車両の速度(V)が前記第2閾値(TH2)未満である場合において、
前記車両の速度(V)が零以上であって、前記要求駆動力(Tr)が前記第2駆動ユニット(100B)により出力可能な最大駆動力よりも大きい場合には、前記第1駆動ユニット(100A)の前記動作モードを前記第2モードに代えて前記第4モードとして、前記第1駆動ユニット(100A)及び前記第2駆動ユニット(100B)の双方により前記要求駆動力(Tr)を出力するように制御すると好適である。
前記第1駆動ユニット(100A)は、
前記入力部材(I)と前記第1回転要素(E1)との間の動力伝達を断接する第1係合装置(CL1)と、
前記第1回転要素(E1)、前記第2回転要素(E2)、及び前記第3回転要素(E3)の3つの回転要素のうちから選択される2つの間の動力伝達を断接する第2係合装置(CL2)と、
前記第2回転要素(E2)と前記出力部材(O1)との間の動力伝達を断接する第3係合装置(CL3)と、を更に備え、
前記第1モードでは、前記第1係合装置(CL1)が解放状態であり、前記第2係合装置(CL2)及び前記第3係合装置(CL3)のそれぞれが係合状態とされ、
前記第2モードでは、前記第1係合装置(CL1)及び前記第2係合装置(CL2)のそれぞれが係合状態であり、前記第3係合装置(CL3)が解放状態とされ、
前記第3モードでは、前記第1係合装置(CL1)、前記第2係合装置(CL2)、及び前記第3係合装置(CL3)のそれぞれが係合状態とされ、
前記第4モードでは、前記第1係合装置(CL1)が係合状態であり、前記第2係合装置(CL2)が解放状態であり、前記第3係合装置(CL3)が係合状態とされると好適である。
100A:第1駆動ユニット
100B:第2駆動ユニット
10 :制御装置
D1 :第1駆動力源
D2 :第2駆動力源
MG1 :第1回転電機
CL1 :第1係合装置
CL2 :第2係合装置
CL3 :第3係合装置
I :入力部材
EG :内燃機関
BT :蓄電装置
W1 :第1車輪
W2 :第2車輪
Claims (5)
- 車両の前輪及び後輪を駆動するための車両用駆動装置であって、
前記前輪及び前記後輪のうち、一方を第1車輪とし、他方を第2車輪として、
前記車両が備える内燃機関に駆動連結される入力部材、及び第1駆動力源を備え、前記第1車輪を駆動する第1駆動ユニットと、
第2駆動力源を備え、前記第2車輪を駆動する第2駆動ユニットと、
前記第1駆動ユニット、前記第2駆動ユニット、及び前記内燃機関を制御する制御装置と、を備え、
前記第1駆動力源は、蓄電装置との間で電力の授受を行う回転電機であり、
前記第1駆動ユニットは、動作モードとして、第1モードと、第2モードと、を備え、
前記第1モードでは、前記内燃機関と前記第1車輪との間での動力伝達が遮断された状態、かつ、前記第1駆動力源と前記第1車輪との間での動力伝達が行われる状態となり、
前記第2モードでは、前記内燃機関と前記第1駆動力源との間での動力伝達が行われる状態、かつ、前記内燃機関及び前記第1駆動力源の双方と前記第1車輪との間での動力伝達が遮断された状態であって、前記内燃機関から伝達される駆動力により前記第1駆動力源が発電を行う状態となり、
前記制御装置は、
前記蓄電装置の充電量が規定の第1閾値未満であって、前記車両の速度が規定の第2閾値未満である場合において、
前記車両の速度が零以上であって、前記車両に要求される駆動力である要求駆動力が零以上の場合には、前記第1駆動ユニットの前記動作モードを前記第2モードとして、前記第2駆動ユニットにより前記要求駆動力を出力するように制御し、
前記車両の速度が零より大きく、前記要求駆動力が零未満の場合には、前記第1駆動ユニットの前記動作モードを前記第1モードとして、前記第1駆動力源に回生による発電を行わせると共に、前記内燃機関を動作状態とし、前記第1駆動ユニット及び前記第2駆動ユニットの双方により前記要求駆動力を出力するように制御する、車両用駆動装置。 - 前記第1駆動ユニットは、前記動作モードとして、第3モードを更に備え、
前記第3モードでは、前記内燃機関及び前記第1駆動力源の双方と前記第1車輪との間での動力伝達が行われる状態となり、
前記制御装置は、前記蓄電装置の充電量が前記第1閾値未満であって、前記車両の速度が前記第2閾値以上である場合に、前記第1駆動ユニットの前記動作モードを前記第3モードとして、前記第1駆動力源に回生による発電を行わせると共に、前記第1駆動ユニットと前記第2駆動ユニットとを合わせて前記要求駆動力を出力するように制御する、請求項1に記載の車両用駆動装置。 - 前記第1駆動ユニットは、
前記第1車輪に駆動連結される出力部材と、
回転速度の順に、第1回転要素、第2回転要素、及び第3回転要素を備えた分配用差動歯車機構と、を更に備え、
前記第1回転要素は、前記入力部材に駆動連結され、
前記第2回転要素は、前記出力部材に駆動連結され、
前記第3回転要素は、前記第1駆動力源に駆動連結され、
前記第1駆動ユニットは、前記動作モードとして、前記分配用差動歯車機構を介して前記第1駆動力源の駆動力と前記内燃機関の駆動力とを合わせて前記第2回転要素から前記出力部材に出力する第4モードを更に備え、
前記制御装置は、
前記蓄電装置の充電量が前記第1閾値未満であって、前記車両の速度が前記第2閾値未満である場合において、
前記車両の速度が零以上であって、前記要求駆動力が前記第2駆動ユニットにより出力可能な最大駆動力よりも大きい場合には、前記第1駆動ユニットの前記動作モードを前記第2モードに代えて前記第4モードとして、前記第1駆動ユニット及び前記第2駆動ユニットの双方により前記要求駆動力を出力するように制御する、請求項2に記載の車両用駆動装置。 - 前記第1駆動ユニットは、
前記入力部材と前記第1回転要素との間の動力伝達を断接する第1係合装置と、
前記第1回転要素、前記第2回転要素、及び前記第3回転要素の3つの回転要素のうちから選択される2つの間の動力伝達を断接する第2係合装置と、
前記第2回転要素と前記出力部材との間の動力伝達を断接する第3係合装置と、を更に備え、
前記第1モードでは、前記第1係合装置が解放状態であり、前記第2係合装置及び前記第3係合装置のそれぞれが係合状態とされ、
前記第2モードでは、前記第1係合装置及び前記第2係合装置のそれぞれが係合状態であり、前記第3係合装置が解放状態とされ、
前記第3モードでは、前記第1係合装置、前記第2係合装置、及び前記第3係合装置のそれぞれが係合状態とされ、
前記第4モードでは、前記第1係合装置が係合状態であり、前記第2係合装置が解放状態であり、前記第3係合装置が係合状態とされる、請求項3に記載の車両用駆動装置。 - 前記第2駆動力源は、前記蓄電装置との間で電力の授受を行う第2の回転電機である、請求項1から4のいずれか一項に記載の車両用駆動装置。
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