JP2020175837A - 車両システム - Google Patents
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- B60K23/0808—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles for varying torque distribution between driven axles, e.g. by transfer clutch
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- B60K17/00—Arrangement or mounting of transmissions in vehicles
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- B60K23/0808—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles for varying torque distribution between driven axles, e.g. by transfer clutch
- B60K2023/0816—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles for varying torque distribution between driven axles, e.g. by transfer clutch for varying front-rear torque distribution with a central differential
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Abstract
Description
このように構成された本発明によれば、制御器は、ヨーレート差関連値が第2所定値(>第1所定値)以上である場合には、上述したようにトルク配分機構により後輪に配分されるトルクを減少させる制御に加えて、実ヨーレートとは逆回りのヨーモーメントを車両に付加する制御を行う。これにより、車両がオーバーステア傾向になることを効果的に抑制できると共に、旋回からの復帰性能を効果的に向上させることができる。
このように構成された本発明によれば、制御器は、ヨーレート差関連値が第3所定値(>第2所定値)以上である場合には、比較的大きなヨーモーメントを車両に付加する制御を行う。すなわち、制御器は、ヨーレート差関連値が第1所定値以上になって後輪に配分されるトルクを減少させる制御を行い、ヨーレート差関連値が第2所定値以上になってヨーモーメントを車両に付加する制御を行っても、車両の横滑りが発生している場合には、比較的大きなヨーモーメントを車両に付加する制御を行う。これにより、車両の横滑りを確実に防止することができる。
このように構成された本発明によれば、制御器は、ステアリングホイールの切り込み操作時に、後輪に配分されるトルクを増加させて、前傾方向のピッチングを車体に生成させるので、ターンイン時にドライバに応答感を与えることができると共に、ステアリングホイールの切り込み操作に対する車両の旋回応答性を向上させることができる。この後、制御器は、ステアリングホイールの切り戻し操作時に、後輪に配分されるトルクを減少させて、後傾方向のピッチングを車体に生成させるので、ターンアウト時にドライバに安定感を与えることができると共に、旋回からの復帰性能を向上させることができる。
更に、制御器は、上記のようにステアリングホイールの切り戻し操作時に後輪に配分されるトルクを減少させるに当たって、ヨーレート差関連値が第1所定値以上である場合には第1所定値未満である場合よりも、後輪に配分されるトルクの減少量を大きくするので、車両がオーバーステア傾向になることを効果的に抑制することができる。
まず、本発明の実施形態による車両システムの構成について説明する。図1は、本発明の実施形態による車両システムが適用された車両の全体構成を示すブロック図である。
次に、本実施形態においてコントローラ50が実行する制御内容について説明する。
次に、本発明の実施形態による車両システムによる作用及び効果について説明する。
上述した実施形態では、エンジン4を動力源として用いる車両1に本発明を適用する例を示したが、本発明は、エンジン4以外を動力源として用いる車両にも適用可能である。例えば、本発明は、モータ(電動機)を動力源として用いる車両にも適用可能である。
2a 前輪
2b 後輪
4 エンジン
5a トランスミッション
5b プロペラシャフト
5d トランスファー
5e 電磁カップリング
5f 駆動伝達シャフト
7 操舵装置
6 ステアリングホイール
8 操舵角センサ
10 アクセル開度センサ
12 車速センサ
50 コントローラ
Claims (5)
- 車両システムであって、
車両を駆動するためのトルクを生成する動力源と、
主駆動輪である後輪及び補助駆動輪である前輪を含む車輪と、
前記動力源のトルクを前記前輪と前記後輪とに配分するトルク配分機構と、
ドライバにより操作されるステアリングホイールと、
少なくとも前記トルク配分機構を制御する制御器と、を有し、
前記制御器は、前記ステアリングホイールが切り戻し操作されたときにおいて、このステアリングホイールの操舵に応じて前記車両に発生させるべき目標ヨーレートと、前記車両に実際に発生している実ヨーレートとの差に関連するヨーレート差関連値が第1所定値以上である場合に、前記動力源のトルクのうちで前記後輪に配分されるトルクを減少させるように前記トルク配分機構を制御するよう構成されている、
ことを特徴とする車両システム。 - 前記車輪に制動力を付与するブレーキ装置を更に有し、
前記制御器は、前記ヨーレート差関連値が前記第1所定値よりも大きい第2所定値以上である場合には、前記実ヨーレートとは逆回りのヨーモーメントを前記車両に付加するように前記ブレーキ装置を制御するよう構成されている、
請求項1に記載の車両システム。 - 前記制御器は、前記ヨーレート差関連値が前記第2所定値よりも大きい第3所定値以上である場合には、前記ヨーレート差関連値が前記第2所定値よりも大きく且つ前記第3所定値未満である場合よりも大きな前記ヨーモーメントを前記車両に付加するように前記ブレーキ装置を制御するよう構成されている、
請求項2に記載の車両システム。 - 前記制御器は、
前記ステアリングホイールが切り込み操作されたときに、前記後輪に配分されるトルクを増加させるように前記トルク配分機構を制御し、この後に前記ステアリングホイールが切り戻し操作されたときに、前記後輪に配分されるトルクを減少させるように前記トルク配分機構を制御し、
前記ステアリングホイールが切り戻し操作されたときにおいて、前記ヨーレート差関連値が前記第1所定値以上である場合には、前記ヨーレート差関連値が前記第1所定値未満である場合よりも、前記後輪に配分されるトルクの減少量を大きくするように前記トルク配分機構を制御するよう構成されている、
請求項1乃至3のいずれか一項に記載の車両システム。 - 前記ヨーレート差関連値は、前記目標ヨーレートと前記実ヨーレートとの差の変化速度、及び/又は前記目標ヨーレートと前記実ヨーレートとの差である、請求項1乃至4のいずれか一項に記載の車両システム。
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