JPWO2010137123A1 - 車両用動力伝達装置の変速制御装置 - Google Patents
車両用動力伝達装置の変速制御装置 Download PDFInfo
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- JPWO2010137123A1 JPWO2010137123A1 JP2011515782A JP2011515782A JPWO2010137123A1 JP WO2010137123 A1 JPWO2010137123 A1 JP WO2010137123A1 JP 2011515782 A JP2011515782 A JP 2011515782A JP 2011515782 A JP2011515782 A JP 2011515782A JP WO2010137123 A1 JPWO2010137123 A1 JP WO2010137123A1
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- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/68—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings
- F16H61/684—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings without interruption of drive
- F16H61/686—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for stepped gearings without interruption of drive with orbital gears
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
Description
エンジン8と動力分配機構16と第1電動機M1とを備えておらず第2電動機M2を走行用の駆動力源とする電気自動車であっても差し支えない。
8:エンジン
10:動力伝達装置(車両用動力伝達装置)
11:差動部(電気式差動部)
16:動力分配機構(差動機構)
18:伝達部材(自動変速機の入力回転部材)
20:自動変速部(自動変速機)
24:差動部遊星歯車装置(遊星歯車装置)
34:駆動輪
56:蓄電装置
80:電子制御装置(変速制御装置)
M1:第1電動機(差動用電動機)
M2:第2電動機(走行用電動機)
C1:第1クラッチ(係合要素)
C2:第2クラッチ(係合要素)
C3:第3クラッチ(係合要素)
B1:第1ブレーキ(係合要素)
B2:第2ブレーキ(係合要素)
RE1:第1回転要素
RE2:第2回転要素
RE3:第3回転要素
特許文献2:特開平9−9414号公報
発明の概要
発明が解決しようとする課題
[0004]
ところで、特許文献1の車両用動力伝達装置のように動力伝達経路に電動機が連結されている車両では、コースト走行時にはその電動機が駆動輪からの逆駆動力を電気エネルギに変換する回生作動をすることがよく知られている。例えば、特許文献1の車両用動力伝達装置では、前記走行用電動機がコースト走行中に回生を行う。この走行用電動機の回生作動により車両全体として燃費を向上させることができる。そして、そのときの回生量が大きいほど燃費向上に大きく貢献する。
[0005]
しかし、前記基準車速は、車両全体の動力損失を低減するなどして前記走行用電動機を回生作動させる目的で設定されたものではないので、特許文献1の車両用動力伝達装置の変速制御装置は、必ずしも、コースト走行時に燃費を向上させるように有段式自動変速部のダウンシフトを行うというものではなかった。なお、このような課題は未公知のことである。
[0006]
本発明は、以上の事情を背景として為されたものであり、その目的とするところは、コースト走行中に電動機が回生作動をする車両用動力伝達装置において、燃費を向上させるようにコースト走行時の自動変速機のダウンシフトを実行する車両用動力伝達装置の変速制御装置を提供することにある。
課題を解決するための手段
[0007]
[0008]
上記目的を達成するための請求項2に係る発明の要旨とするところは、(a)走行用電動機と、その走行用電動機と駆動輪との間の動力伝達経路の一部を構成する有段の自動変速機とを備えた車両において、コースト走行中に前記走行用電動機により回生を行うと共に所定のコーストダウン変速車速にて前記自動変速機のダウンシフトを行う車両用動力伝達装置の変速制御装置であって、(b)前記コーストダウン変速車速を前記走行用電動機の回生パワーに応じて変更し、(c)コースト走行中
において、前記走行用電動機は、所定の駆動被駆動切替車速よりも高車速側では回生作動する一方でその駆動被駆動切替車速よりも低車速側では駆動トルクを発生し、(d)前記走行用電動機の前記回生パワーが大きいほど、前記自動変速機の最低車速側変速段へのダウンシフトを行うための前記コーストダウン変速車速と前記駆動被駆動切替車速とを低くすることを特徴とする。
[0009]
また、請求項3に係る発明の要旨とするところは、コースト走行中に行われる前記最低車速側変速段へのダウンシフトでは、そのダウンシフト中に前記自動変速機の解放側係合要素および係合側係合要素が解放された状態でその自動変速機の入力回転速度を前記走行用電動機により前記ダウンシフト後の回転速度に同期させて、前記係合側係合要素を係合させることを特徴とする。
[0010]
また、請求項4に係る発明の要旨とするところは、コースト走行中において前記ダウンシフト後に前記走行用電動機により回生を行う場合には、前記回生トルクが所定トルク以上であることを条件にそのダウンシフトを行うことを特徴とする。
[0011]
また、請求項5に係る発明の要旨とするところは、エンジンと前記自動変速機との間に連結された差動機構と、その差動機構に動力伝達可能に連結された差動用電動機とを有し、その差動用電動機の運転状態が制御されることにより前記差動機構の差動状態が制御される電気式差動部が設けられていることを特徴とする。
[0012]
また、請求項6に係る発明の要旨とするところは、(a)前記差動機構は、第1回転要素と第2回転要素と第3回転要素とを有する遊星歯車装置であり、(b)前記第1回転要素は前記エンジンに連結され、前記第2回転要素は前記差動用電動機に連結され、前記第3回転要素は前記走行用電動機および前記自動変速機の入力回転部材に連結されていることを特徴とする。
[0013]
また、請求項7に係る発明の要旨とするところは、(a)前記走行用電動機の前記回生パワーにより充電される蓄電装置が設けられており、(b)前
記走行用電動機と前記差動用電動機と前記蓄電装置とは相互に電力授受可能になっていることを特徴とする。
[0014]
また、請求項8に係る発明の要旨とするところは、前記自動変速機は、相互に異なる変速比を有して予め機械的に設定された複数の変速段の中で一の変速段が他の変速段に切り換えられることにより変速されることを特徴とする。
[0015]
また、請求項9に係る発明の要旨とするところは、前記自動変速機はそれが有する係合要素の掴み替えにより変速されることを特徴とする。
発明の効果
[0016]
請求項2に係る発明によれば、その発明の係る変速制御装置は、(a)コースト走行中に前記走行用電動機により回生を行うと共に所定のコーストダウン変速車速にて前記自動変速機のダウンシフトを行うものであり、(b)前記コーストダウン変速車速を前記走行用電動機の回生パワーに応じて変更するので、できるだけ多くの電気エネルギが回生されるようにそのコーストダウン変速車速をその回生パワーをパラメータとして設定することができる。その結果として、そのコーストダウン変速車速が一定値である場合との比較で、燃費を向上させるようにコースト走行時の自動変速機のダウンシフトを実行することができる。なお、前記自動変速機が3以上の変速段を有する多段変速機である場合には、前記コーストダウン変速車速は、コースト走行中に行われる自動変速機の各ダウンシフトに対してそれぞれ設定されるものである。
[0017]
ここで、好適には、前記変速制御装置は、コースト走行中の車両全体のエネルギ損失(トータル損失)が低下する側に、前記コーストダウン変速車速を前記走行用電動機の回生パワーに応じて変更する。
[0018]
また、請求項2に係る発明によれば、(a)コースト走行中において、前記走行用電動機は、所定の駆動被駆動切替車速よりも高車速側では回生作動する一方でその駆動被駆動切替車速よりも低車速側では駆動トルクを発生し、(b)前記走行用電動機の前記回生パワーが大きいほど、前記自動変速機
Claims (9)
- 走行用電動機と、該走行用電動機と駆動輪との間の動力伝達経路の一部を構成する有段の自動変速機とを備えた車両において、コースト走行中に前記走行用電動機により回生を行うと共に所定のコーストダウン変速車速にて前記自動変速機のダウンシフトを行う車両用動力伝達装置の変速制御装置であって、
前記コーストダウン変速車速を前記走行用電動機の回生パワーに応じて変更する
ことを特徴とする車両用動力伝達装置の変速制御装置。 - コースト走行中において、前記走行用電動機は、所定の駆動被駆動切替車速よりも高車速側では回生作動する一方で該駆動被駆動切替車速よりも低車速側では駆動トルクを発生し、
前記走行用電動機の前記回生パワーが大きいほど、前記自動変速機の最低車速側変速段へのダウンシフトを行うための前記コーストダウン変速車速と前記駆動被駆動切替車速とを低くする
ことを特徴とする請求項1に記載の車両用動力伝達装置の変速制御装置。 - コースト走行中に行われる前記最低車速側変速段へのダウンシフトでは、該ダウンシフト中に前記自動変速機の解放側係合要素および係合側係合要素が解放された状態で該自動変速機の入力回転速度を前記走行用電動機により前記ダウンシフト後の回転速度に同期させて、前記係合側係合要素を係合させる
ことを特徴とする請求項2に記載の車両用動力伝達装置の変速制御装置。 - コースト走行中において前記ダウンシフト後に前記走行用電動機により回生を行う場合には、前記回生トルクが所定トルク以上であることを条件に該ダウンシフトを行う
ことを特徴とする請求項1乃至3の何れか1項に記載の車両用動力伝達装置の変速制御装置。 - エンジンと前記自動変速機との間に連結された差動機構と、該差動機構に動力伝達可能に連結された差動用電動機とを有し、該差動用電動機の運転状態が制御されることにより前記差動機構の差動状態が制御される電気式差動部が設けられている
ことを特徴とする請求項1乃至4の何れか1項に記載の車両用動力伝達装置の変速制御装置。 - 前記差動機構は、第1回転要素と第2回転要素と第3回転要素とを有する遊星歯車装置であり、
前記第1回転要素は前記エンジンに連結され、前記第2回転要素は前記差動用電動機に連結され、前記第3回転要素は前記走行用電動機および前記自動変速機の入力回転部材に連結されている
ことを特徴とする請求項5に記載の車両用動力伝達装置の変速制御装置。 - 前記走行用電動機の前記回生パワーにより充電される蓄電装置が設けられており、
前記走行用電動機と前記差動用電動機と前記蓄電装置とは相互に電力授受可能になっている
ことを特徴とする請求項5又は6に記載の車両用動力伝達装置の変速制御装置。 - 前記自動変速機は、相互に異なる変速比を有して予め機械的に設定された複数の変速段の中で一の変速段が他の変速段に切り換えられることにより変速される
ことを特徴とする請求項1乃至7の何れか1項に記載の車両用動力伝達装置の変速制御装置。 - 前記自動変速機はそれが有する係合要素の掴み替えにより変速される
ことを特徴とする請求項8に記載の車両用動力伝達装置の変速制御装置。
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CN102458945A (zh) | 2012-05-16 |
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