JP3451695B2 - Driving force distribution control system for front and rear wheels and left and right wheels - Google Patents
Driving force distribution control system for front and rear wheels and left and right wheelsInfo
- Publication number
- JP3451695B2 JP3451695B2 JP01909794A JP1909794A JP3451695B2 JP 3451695 B2 JP3451695 B2 JP 3451695B2 JP 01909794 A JP01909794 A JP 01909794A JP 1909794 A JP1909794 A JP 1909794A JP 3451695 B2 JP3451695 B2 JP 3451695B2
- Authority
- JP
- Japan
- Prior art keywords
- force distribution
- wheel drive
- distribution control
- control system
- drive force
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、前後輪駆動力配分制御
システムと左右輪駆動力配分制御システムが共に搭載さ
れた車両に適用される前後輪と左右輪の駆動力配分総合
制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front / rear wheel and left / right wheel driving force comprehensive control device applied to a vehicle equipped with both a front / rear wheel driving force distribution control system and a left / right wheel driving force distribution control system.
【０００２】[0002]
【従来の技術】従来、前後輪と左右輪の駆動力配分総合
制御装置としては、例えば、特開昭６２−２９２５２９
号公報に記載されている装置が知られている。2. Description of the Related Art Conventionally, as a drive force distribution integrated control device for front and rear wheels and left and right wheels, for example, JP-A-62-292529 is known.
The device described in the publication is known.
【０００３】この従来出典には、クラッチ締結力の大き
さにより前輪側への駆動力配分を制御する前後輪駆動力
配分制御システムと、クラッチ締結力の大きさにより差
動制限トルクを制御する差動制限トルク制御システムと
が共に搭載された車両において、両システムで用いられ
るクラッチ締結力の一方を高める時には他方も高めると
いうように連動させることで、駆動輪スリップを有効に
抑え、スタック脱出性の向上や低摩擦係数路での加速性
の向上を図る技術が示されている。[0003] According to this conventional source, front and rear wheel drive force distribution control systems which control the drive force distribution to the front wheels by the magnitude of the clutch engagement force, and the difference which controls the differential limiting torque by the magnitude of the clutch engagement force. In vehicles equipped with both the dynamic limit torque control system and the clutch engaging force used in both systems, when one of them is increased, the other is also increased to effectively suppress the drive wheel slip and to improve the stack escapeability. Techniques for improving and accelerating on low friction coefficient roads are shown.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の前後輪と左右輪の駆動力配分総合制御装置に
あっては、それぞれのシステムにおいて異常が発生した
場合、それぞれのフェイルセーフシステムによって制御
を中断したりする装置であるため、例えば、前後輪駆動
力配分制御システムのみが異常となった時、前後輪駆動
力配分制御システムによる制御を中断し、左右輪駆動力
配分制御システムが制御を続行すると、ステア特性がオ
ーバー側あるいはアンダー側となり、その後の旋回性能
に大きく影響を与えてしまうという問題がある。However, in such a conventional front-rear wheel and left-right wheel driving force distribution integrated control device, when an abnormality occurs in each system, control is performed by each fail-safe system. Since it is a device that interrupts the front and rear wheel drive force distribution control system, for example, when only the front and rear wheel drive force distribution control system becomes abnormal, the control by the front and rear wheel drive force distribution control system is interrupted and the left and right wheel drive force distribution control system stops the control. If it continues, the steer characteristic will become over or under side, and there will be a problem that the turning performance thereafter will be greatly affected.
【０００５】すなわち、前後輪駆動力配分制御システム
が主駆動軸（後輪駆動ベースなら後輪駆動軸で、前輪駆
動ベースなら前輪駆動軸）にその駆動力を多く配分する
システムにあっては、前後輪駆動力配分制御を中断し、
主駆動軸の差動を制限するような左右輪駆動力配分制御
システムが制御を続行していると、後輪駆動ベースの前
後輪駆動力配分制御システムを搭載した車両では著しい
オーバーステアを生じ、前輪駆動ベースの前後輪駆動力
配分制御システムを搭載した車両では著しいアンダース
テアを生じてしまう。That is, in a system in which the front and rear wheel drive force distribution control system distributes a large amount of the drive force to the main drive shaft (the rear wheel drive shaft if the rear wheel drive base, the front wheel drive shaft if the front wheel drive base), Suspending the front and rear wheel drive force distribution control,
If the left and right wheel drive force distribution control system that limits the differential of the main drive shaft continues to control, a vehicle equipped with a rear wheel drive-based front and rear wheel drive force distribution control system will experience significant oversteer. A vehicle equipped with a front-wheel drive-based front-rear wheel drive force distribution control system causes a significant understeer.
【０００６】そこで、前後輪と左右輪の駆動力配分制御
システムが共に搭載されている車両において、一方の制
御システムに異常が発生すると、両制御システムによる
制御を共に解除してしまうという案がある。Therefore, in a vehicle equipped with both the front and rear wheels and the left and right wheels driving force distribution control system, if an abnormality occurs in one of the control systems, there is a plan to cancel the control by both control systems. .
【０００７】しかし、この場合、左右輪駆動力配分制御
システムのみが異常となった時、前後輪駆動力配分制御
システムによる制御を解除すると、駆動輪スリップを抑
えた高い駆動性能やステア特性をニュートラルあるいは
弱アンダーステアを保つことでの高い操縦安定性が得ら
れる前後輪駆動力配分制御システムの搭載意義を失って
しまう。However, in this case, when only the left and right wheel drive force distribution control system becomes abnormal, if the control by the front and rear wheel drive force distribution control system is released, high drive performance and steer characteristics with suppressed drive wheel slip are neutralized. Or, it loses the significance of mounting the front and rear wheel drive force distribution control system that can obtain high steering stability by maintaining weak understeer.
【０００８】本発明は、上述のような問題点に着目して
なされたもので、第１の目的とするところは、前後輪駆
動力配分制御システムと左右輪駆動力配分制御システム
が共に搭載された車両に適用される前後輪と左右輪の駆
動力配分総合制御装置において、左右輪駆動力配分制御
システムのみの異常時、前後輪駆動力配分制御による駆
動性能や操安性を確保することにある。The present invention has been made by paying attention to the above problems. A first object of the present invention is to mount both a front and rear wheel drive force distribution control system and a left and right wheel drive force distribution control system. and the driving force distribution integrated control system of the front and rear wheels and right wheels is applied to a vehicle, the left and right wheel driving force distribution control
When there is an abnormality in only the system, drive by front and rear wheel drive force distribution control
It is to secure dynamic performance and maneuverability .
【０００９】第２の目的とするところは、前後輪駆動力
配分制御システムと左右輪駆動力配分制御システムが共
に搭載された車両に適用される前後輪と左右輪の駆動力
配分総合制御装置において、左右輪駆動力配分制御シス
テムのみの異常時、前後輪駆動力配分制御による駆動性
能や操安性を確保すると共に、前後輪駆動力配分制御シ
ステムのみの異常時、ステア特性が強オーバーステアあ
るいは強アンダーステアとなるのを防止することにあ
る。A second object of the present invention is to provide a front / rear wheel left / right wheel drive force comprehensive control apparatus applied to a vehicle equipped with both the front / rear wheel drive force distribution control system and the left / right wheel drive force distribution control system. When the left and right wheel drive force distribution control system is abnormal, the front and rear wheel drive force distribution control ensures drive performance and maneuverability , and the front and rear wheel drive force distribution control system
Steer characteristics are strong when the stem is abnormal.
Rui is to prevent strong understeer .
【００１０】上記第１の目的を達成するため請求項１記
載の第１の発明の前後輪と左右輪の駆動力配分総合制御
装置では、図１（ロ）のクレーム対応図に示すように、
前後輪の一方を駆動ベースとしながら車両の走行状態に
応じて前後輪への駆動力配分を制御する前後輪駆動力配
分制御システムａと、車両の走行状態に応じて左右輪へ
の駆動力配分を制御する左右輪駆動力配分制御システム
ｂと、走行時、左右輪駆動力配分制御システムｂの異常
を検出する左右輪駆動力配分制御システム異常検出手段
ｅと、左右輪駆動力配分制御システムｂのみの異常を検
出した場合、左右輪駆動力配分制御システムｂによる制
御を解除し、前後輪駆動力配分制御システムａによる制
御を継続する第１左右輪駆動力配分制御異常対応手段ｆ
１と、を備えていることを特徴とする。In order to achieve the above-mentioned first object, the driving force distribution integrated control system for the front and rear wheels and the left and right wheels according to the first aspect of the present invention, as shown in the claim correspondence diagram of FIG.
Front and rear wheel drive force distribution control system a for controlling the drive force distribution to the front and rear wheels according to the running state of the vehicle while using one of the front and rear wheels as a drive base, and the drive force distribution to the left and right wheels according to the running state of the vehicle Of the left and right wheel driving force distribution control system b for controlling the
Left / Right Wheel Driving Force Distribution Control System Abnormality Detection Means
e and the abnormality of only the left and right wheel drive force distribution control system b
If left, the left and right wheel drive force distribution control system b
Control, and control by the front and rear wheel drive force distribution control system a
First left / right wheel drive force distribution control abnormality response means f
1 is provided.
【００１１】上記第２の目的を達成するため請求項２記
載の第２の発明の前後輪と左右輪の駆動力配分総合制御
装置では、図１(イ)（ロ）のクレーム対応図に示すよう
に、前後輪の一方を駆動ベースとしながら車両の走行状
態に応じて前後輪への駆動力配分を制御する前後輪駆動
力配分制御システムａと、車両の走行状態に応じて左右
輪への駆動力配分を制御する左右輪駆動力配分制御シス
テムｂと、を搭載し、走行時、左右輪駆動力配分制御シ
ステムｂの異常を検出する左右輪駆動力配分制御システ
ム異常検出手段ｅと、走行時、前後輪駆動力配分制御シ
ステムａの異常を検出する前後輪駆動力配分制御システ
ム異常検出手段ｃと、を有し、左右輪駆動力配分制御シ
ステムｂのみの異常を検出した場合、左右輪駆動力配分
制御システムｂによる制御を解除し、前後輪駆動力配分
制御システムａによる制御を継続する第１左右輪駆動力
配分制御異常対応手段ｆ１と、前後輪駆動力配分制御シ
ステムａのみの異常を検出した場合、前後輪駆動力配分
制御システムａによる制御を解除すると共に左右輪駆動
力配分制御システムｂによる制御を解除する第１前後輪
駆動力配分制御異常対応手段ｄ１と、を備えていること
を特徴とする。In order to achieve the above-mentioned second object, the front-rear wheel and left-right wheel driving force distribution comprehensive control device according to the second invention of claim 2 is shown in the claim correspondence diagram of FIG. 1 (a) (b) . As described above, the front and rear wheel drive force distribution control system a that controls the drive force distribution to the front and rear wheels according to the running state of the vehicle while using one of the front and rear wheels as a drive base, and the left and right wheels according to the running state of the vehicle left and right wheel driving force distribution control system b for controlling the driving force distribution, was mounted, during running, the left and right wheel driving force distribution control system abnormality detecting means e for detecting an abnormality of the left and right wheel driving force distribution control system b, running Front and rear wheel drive force distribution control system
Front / rear wheel drive force distribution control system for detecting abnormality of stem a
When the abnormality of only the left and right wheel drive force distribution control system b is detected, the control by the left and right wheel drive force distribution control system b is canceled and the front and rear wheel drive force distribution control system a is used. The first left / right wheel drive force distribution control abnormality responding means f1 for continuing control and the front / rear wheel drive force distribution control system.
When abnormality of only stem a is detected, front and rear wheel drive force distribution
Releases control by control system a and drives left and right wheels
First front and rear wheels that release control by the force distribution control system b
And a driving force distribution control abnormality responding means d1 .
【００１２】上記第２の目的を達成するため請求項３記
載の第３の発明の前後輪と左右輪の駆動力配分総合制御
装置では、図１（ハ）のクレーム対応図に示すように、
制御指令により強制的に４輪等配分状態とする強制４輪
駆動バルブｇを有し、前後輪の一方を駆動ベースとしな
がら所定の車両状態に応じて前後輪への駆動力配分を制
御する前後輪駆動力配分制御システムａと、所定の車両
状態に応じて左右輪への駆動力配分を制御する左右輪駆
動力配分制御システムｂと、走行時、前後輪駆動力配分
制御システムａの異常を検出する前後輪駆動力配分制御
システム異常検出手段ｃと、前後輪駆動力配分制御シス
テムａのみの異常を検出した場合、前後輪駆動力配分制
御システムａの強制４輪駆動バルブｇを作動させると共
に左右輪駆動力配分制御システムｂによる制御を解除す
る第２前後輪駆動力配分制御異常対応手段ｄ２と、を備
えていることを特徴とする。In order to achieve the above-mentioned second object, according to the third aspect of the present invention, the front and rear wheels and the left and right wheels driving force distribution comprehensive control device, as shown in the claim correspondence diagram of FIG.
Before and after controlling the distribution of the driving force to the front and rear wheels according to a predetermined vehicle state while having a compulsory four-wheel drive valve g forcibly bringing the four wheels into a distribution state according to a control command and using one of the front and rear wheels as a drive base. Wheel drive force distribution control system a, left and right wheel drive force distribution control system b that controls the drive force distribution to the left and right wheels according to a predetermined vehicle state, and front and rear wheel drive force distribution control system a when an abnormality occurs When an abnormality is detected only in the front / rear wheel drive force distribution control system abnormality detecting means c and the front / rear wheel drive force distribution control system a, the forced four-wheel drive valve g of the front / rear wheel drive force distribution control system a is operated. Second front and rear wheel drive force distribution control abnormality responding means d2 for canceling the control by the left and right wheel drive force distribution control system b.
【００１３】上記第１の目的を達成するため請求項４記
載の第４の発明の前後輪と左右輪の駆動力配分総合制御
装置では、図１（ニ）のクレーム対応図に示すように、
制御指令により強制的に４輪等配分状態とする強制４輪
駆動バルブｇを有し、前後輪の一方を駆動ベースとしな
がら車両の走行状態に応じて前後輪への駆動力配分を制
御する前後輪駆動力配分制御システムａと、車両の走行
状態に応じて左右輪への駆動力配分を制御する左右輪駆
動力配分制御システムｂと、走行時、左右輪駆動力配分
制御システムの異常を検出する左右輪駆動力配分制御シ
ステム異常検出手段ｅと、左右輪駆動力配分制御システ
ムｂのみの異常を検出した場合、左右輪駆動力配分制御
システムｂによる制御を解除し、前後輪駆動力配分制御
システムの強制４輪駆動バルブｇを作動させずに前後輪
駆動力配分制御を継続する第２左右輪駆動力配分制御異
常対応手段ｆ２と、を備えていることを特徴とする。In order to achieve the above-mentioned first object , the front and rear wheels and the left and right wheels driving force distribution comprehensive control device according to a fourth aspect of the present invention, as shown in the claim correspondence diagram of FIG.
Before and after controlling the distribution of the driving force to the front and rear wheels according to the running state of the vehicle while having a compulsory four-wheel drive valve g forcibly bringing the four wheels to the distribution state by a control command and using one of the front and rear wheels as a drive base. Wheel drive force distribution control system a, left and right wheel drive force distribution control system b for controlling drive force distribution to the left and right wheels according to the running state of the vehicle, and abnormality detection of the left and right wheel drive force distribution control system during traveling When an abnormality is detected only in the left and right wheel driving force distribution control system abnormality detecting means e and the left and right wheel driving force distribution control system b, the control by the left and right wheel driving force distribution control system b is canceled, and the front and rear wheel driving force distribution control is performed. Second left / right wheel drive force distribution control abnormality responding means f2 for continuing front / rear wheel drive force distribution control without activating the forced four-wheel drive valve g of the system.
【００１４】[0014]
【作用】第１の発明の作用を説明する。The operation of the first invention will be described.
【００１５】走行時、左右輪駆動力配分制御システム異
常検出手段ｅにおいて、左右輪駆動力配分制御システム
ｂのみの異常が検出されると、第１左右輪駆動力配分制
御異常対応手段ｆ１において、左右輪駆動力配分制御シ
ステムｂによる制御が解除され、前後輪駆動力配分制御
システムａによる制御が継続される。When driving, the left and right wheel drive force distribution control system is different.
In the constant detection means e, the left and right wheel drive force distribution control system
When the abnormality of only b is detected, the first left and right wheel drive force distribution control
In the abnormality handling means f1, the left and right wheel drive force distribution control system
The control by the stem b is released and the front and rear wheel drive force distribution control
The control by the system a is continued .
【００１６】したがって、左右輪駆動力配分制御システ
ムｂの異常時においても前後輪駆動力配分制御システム
ａの制御が続行されることで、所定の車両状態に応じた
前後輪駆動力配分制御による駆動性能や操安性が確保さ
れる。Therefore, the left and right wheel driving force distribution control system
Front / rear wheel drive force distribution control system even when abnormality b occurs
By continuing the control of a, the
Driving performance and maneuverability are secured by the front and rear wheel driving force distribution control .
【００１７】第２の発明の作用を説明する。The operation of the second invention will be described.
【００１８】走行時、左右輪駆動力配分制御システム異
常検出手段ｅにおいて、左右輪駆動力配分制御システム
ｂのみの異常が検出されると、第１左右輪駆動力配分制
御異常対応手段ｆ１において、左右輪駆動力配分制御シ
ステムｂによる制御が解除され、前後輪駆動力配分制御
システムａによる制御が継続される。走行時、前後輪駆
動力配分制御システム異常検出手段ｃにおいて、前後輪
駆動力配分制御システムａのみの異常が検出されると、
第１前後輪駆動力配分制御異常対応手段ｄ１において、
前後輪駆動力配分制御システムａによる制御が解除され
ると共に左右輪駆動力配分制御システムｂによる制御も
解除される。 When the left / right wheel drive force distribution control system abnormality detecting means e detects an abnormality in only the left / right wheel drive force distribution control system b during traveling, the first left / right wheel drive force distribution control abnormality responding means f1 The control by the left and right wheel driving force distribution control system b is released, and the control by the front and rear wheel driving force distribution control system a is continued. When driving, front and rear wheel drive
In the power distribution control system abnormality detection means c, front and rear wheels
When an abnormality of only the driving force distribution control system a is detected,
In the first front / rear wheel driving force distribution control abnormality handling means d1,
The control by the front and rear wheel driving force distribution control system a is released.
And the control by the left and right wheel drive force distribution control system b
It will be canceled.
【００１９】したがって、左右輪駆動力配分制御システ
ムｂのみの異常時においては前後輪駆動力配分制御シス
テムａの制御が続行されることで、所定の車両状態に応
じた前後輪駆動力配分制御による駆動性能や操安性が確
保される。前後輪駆動力配分制御システムａのみの異常
時においては、前後輪駆動力配分制御システムａによる
制御解除で駆動ベース側に全ての駆動力が配分される一
定のステア特性を保つ状態となり、しかも、その駆動軸
において差動を制限するような左右輪駆動力配分制御も
解除されることで、ステア特性が強オーバーステアや強
アンダーステアとなることが防止される。 [0019] Thus, when the left and right wheel driving force distribution control system b only abnormality that control of the front-rear wheel driving force distribution control system a continues, by the front-rear wheel driving force distribution control according to a predetermined vehicle condition Driving performance and maneuverability are secured. Abnormalities in front and rear wheel drive force distribution control system a only
Depending on the front and rear wheel drive force distribution control system a
By releasing the control, all the driving force is distributed to the drive base side.
The drive shaft is in a state where the constant steering characteristics are maintained.
Left and right wheel drive force distribution control that limits the differential
By releasing it, the steer characteristics are strong.
Understeer is prevented.
【００２０】第３の発明の作用を説明する。The operation of the third invention will be described.
【００２１】走行時、前後輪駆動力配分制御システム異
常検出手段ｃにおいて、前後輪駆動力配分制御システム
ａのみの異常が検出されると、第２前後輪駆動力配分制
御異常対応手段ｄ２において、前後輪駆動力配分制御シ
ステムａの強制４輪駆動バルブｇが作動されると共に左
右輪駆動力配分制御システムｂによる制御が解除され
る。During traveling, when the front / rear wheel drive force distribution control system abnormality detecting means c detects an abnormality in only the front / rear wheel drive force distribution control system a, the second front / rear wheel drive force distribution control abnormality responding means d2 The forced four-wheel drive valve g of the front and rear wheel drive force distribution control system a is operated and the control by the left and right wheel drive force distribution control system b is released.
【００２２】したがって、前後輪駆動力配分制御システ
ムａの強制４輪駆動バルブｇの作動により前後輪へ等配
分で駆動力が配分される一定のステア特性を保つ状態と
なり、しかも、その駆動軸において差動を制限するよう
な左右輪駆動力配分制御も解除されることで、ステア特
性が強オーバーステアや強アンダーステアとなることが
防止される。Therefore, by operating the forced four-wheel drive valve g of the front and rear wheel drive force distribution control system a, a constant steer characteristic in which the drive force is evenly distributed to the front and rear wheels is maintained, and moreover, at the drive shaft thereof. By releasing the left and right wheel drive force distribution control that limits the differential, it is possible to prevent the steer characteristic from becoming strong oversteer or strong understeer.
【００２３】第４の発明の作用を説明する。The operation of the fourth invention will be described.
【００２４】走行時、左右輪駆動力配分制御システム異
常検出手段ｅにおいて、左右輪駆動力配分制御システム
ｂのみの異常が検出されると、第２左右輪駆動力配分制
御異常対応手段ｆ２において、左右輪駆動力配分制御シ
ステムｂによる制御が解除され、前後輪駆動力配分制御
システムの強制４輪駆動バルブｇを作動させずに前後輪
駆動力配分制御が継続される。During traveling, when the left / right wheel drive force distribution control system abnormality detecting means e detects an abnormality in only the left / right wheel drive force distribution control system b, the second left / right wheel drive force distribution control abnormality responding means f2 The control by the left and right wheel drive force distribution control system b is released, and the front and rear wheel drive force distribution control is continued without operating the forced four-wheel drive valve g of the front and rear wheel drive force distribution control system.
【００２５】したがって、左右輪駆動力配分制御システ
ムｂの異常時においても強制４輪駆動バルブｇを作動さ
せることなく、前後輪駆動力配分制御システムａの制御
が続行されることで、所定の車両状態に応じた前後輪駆
動力配分制御による駆動性能や操安性が確保される。Therefore, even if the left and right wheel drive force distribution control system b is abnormal, the front and rear wheel drive force distribution control system a continues its control without activating the forced four-wheel drive valve g, so that a predetermined vehicle is driven. Drive performance and maneuverability are secured by front-rear wheel drive force distribution control according to the state.
【００２６】[0026]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００２７】（第１実施例）まず、構成を説明する。(First Embodiment) First, the structure will be described.
【００２８】図２は第１の発明及び第２の発明に対応す
る第１実施例の前後輪と左右輪の駆動力配分総合制御装
置が適用された後輪駆動ベースの四輪駆動車の全体シス
テム図である。FIG. 2 shows a rear wheel drive-based four-wheel drive vehicle to which the front and rear wheel and right and left wheel drive force distribution integrated control devices of the first embodiment corresponding to the first and second inventions are applied. It is a system diagram.
【００２９】図２において、エンジン１及びトランスミ
ッション２からの駆動力は、リヤプロペラシャフト３か
ら電制ＬＳＤ４を介して左右の後輪５，６に伝達され、
リヤプロペラシャフト３からＥＴＳトランスファ７，フ
ロントプロペラシャフト８及びフロントディファレンシ
ャル９を介して左右の前輪１０，１１に伝達される。In FIG. 2, the driving force from the engine 1 and the transmission 2 is transmitted from the rear propeller shaft 3 to the left and right rear wheels 5 and 6 via the electronically controlled LSD 4.
It is transmitted from the rear propeller shaft 3 to the left and right front wheels 10 and 11 via the ETS transfer 7, the front propeller shaft 8 and the front differential 9.
【００３０】前記電制ＬＳＤ４には、油圧ユニット１２
から付与されるクラッチ制御圧に応じて左右後輪５，６
間の差動制限トルクを発生する差動制限クラッチ１３が
内蔵されている。A hydraulic unit 12 is attached to the electronically controlled LSD 4.
The left and right rear wheels 5, 6 depending on the clutch control pressure applied from the
A differential limiting clutch 13 that generates a differential limiting torque between is included.
【００３１】前記ＥＴＳトランスファ７には、油圧ユニ
ット１２から付与されるクラッチ制御圧に応じて前輪１
０，１１への伝達駆動トルクを発生するトランスファク
ラッチ１４が内蔵されている。The ETS transfer 7 is connected to the front wheels 1 according to the clutch control pressure applied from the hydraulic unit 12.
A transfer clutch 14 that generates a transmission driving torque to 0 and 11 is built in.
【００３２】前記油圧ユニット１２は、油圧源１５とＥ
ＴＳ制御バルブ１６とＬＳＤ制御バルブ１７とを有して
構成されている。The hydraulic unit 12 includes a hydraulic power source 15 and an E
It has a TS control valve 16 and an LSD control valve 17.
【００３３】前記ＥＴＳ制御バルブ１６は、コントロー
ラ１８のＥＴＳ制御部１８ａからの指令により制御作動
をし、トランスファクラッチ１４へのクラッチ制御圧を
作り出す（前後輪駆動力配分制御システムａに相当）。The ETS control valve 16 is controlled by a command from the ETS control section 18a of the controller 18 to generate a clutch control pressure for the transfer clutch 14 (corresponding to the front and rear wheel drive force distribution control system a).
【００３４】前記ＬＳＤ制御バルブ１７は、コントロー
ラ１８のＬＳＤ制御部１８ｂからの指令により制御作動
をし、差動制限クラッチ１３へのクラッチ制御圧を作り
出す（左右輪駆動力配分制御システムｂに相当）。The LSD control valve 17 is controlled by a command from the LSD control section 18b of the controller 18 to generate a clutch control pressure to the limited differential clutch 13 (corresponding to the left and right wheel drive force distribution control system b). .
【００３５】前記コントローラ１８には、左前輪回転セ
ンサ１９からの左前輪回転数ＮFLと、右前輪回転センサ
２０からの右前輪回転数ＮFRと、左後輪回転センサ２１
からの左後輪回転数ＮRLと、右後輪回転センサ２２から
の右後輪回転数ＮRRと、横加速度センサ２３からの横加
速度YGと、アクセル開度センサ２４からのアクセル開度
θと、ブレーキスイッチ２５からのスイッチ信号等が入
力される。The controller 18 includes the left front wheel rotation speed N FL from the left front wheel rotation sensor 19, the right front wheel rotation speed N FR from the right front wheel rotation sensor 20, and the left rear wheel rotation sensor 21.
From the left rear wheel rotation speed N RL , the right rear wheel rotation sensor 22 from the right rear wheel rotation speed N RR , the lateral acceleration Y G from the lateral acceleration sensor 23, and the accelerator opening degree from the accelerator opening degree sensor 24. θ and the switch signal from the brake switch 25 are input.
【００３６】また、コントローラ１８内のＥＴＳ制御部
１８ａとＬＳＤ制御部１８ｂとの間では、ＥＴＳシステ
ムフェイル情報とＬＳＤシステムフェイル情報を互いに
交換している。The ETS system fail information and the LSD system fail information are exchanged between the ETS controller 18a and the LSD controller 18b in the controller 18.
【００３７】次に、作用を説明する。Next, the operation will be described.
【００３８】［前後輪駆動力配分制御］コントローラ１
８のＥＴＳ制御部１８ａでは、例えば、後輪速と前輪速
との差により前後輪回転速度差を算出し、横加速度YGの
上昇にしたがって徐々に低くなる値で与えられる比例ゲ
インを算出し、前後輪回転速度差と比例ゲインとにより
決まる前輪側伝達駆動トルクが得られるような前後輪駆
動力配分制御が行なわれる。[Front / Rear Wheel Driving Force Distribution Control] Controller 1
The ETS control unit 18a of No. 8 calculates the difference between the front and rear wheel rotation speeds by the difference between the rear wheel speeds and the front wheel speeds, and calculates the proportional gain given as a value that gradually decreases as the lateral acceleration Y G increases. The front and rear wheel drive force distribution control is performed so that the front wheel side transmission drive torque determined by the front and rear wheel rotation speed difference and the proportional gain is obtained.
【００３９】［左右輪駆動力配分制御］コントローラ１
８のＬＳＤ制御部１８ｂでは、例えば、アクセル開度及
びアクセル開速度に応じた左右後輪間の差動制限トルク
が得られるような制御や左右輪回転速度差に応じた左右
後輪間の差動制限トルクが得られるような制御や横加速
度に応じた左右後輪間の差動制限トルクが得られるよう
な左右輪駆動力配分制御が行なわれる。[Left / Right Wheel Driving Force Distribution Control] Controller 1
In the LSD control unit 18b of No. 8, for example, a control for obtaining a differential limiting torque between the left and right rear wheels according to the accelerator opening and the accelerator opening speed, and a difference between the left and right rear wheels according to the left and right wheel rotation speed difference. A control for obtaining a dynamic limiting torque and a left / right wheel driving force distribution control for obtaining a differential limiting torque between the left and right rear wheels according to lateral acceleration are performed.
【００４０】［制御システム異常対応制御］図３はコン
トローラ１８で行なわれる制御システム異常対応制御処
理の流れを示すフローチャートで、以下、各ステップに
ついて説明する。[Control System Abnormality Response Control] FIG. 3 is a flowchart showing the flow of the control system abnormality response control process performed by the controller 18. Each step will be described below.
【００４１】ステップ１００では、前後輪駆動力配分制
御システムあるいは左右輪駆動力配分制御システムに異
常が発生していないかどうかが判定される。In step 100, it is judged whether or not an abnormality has occurred in the front and rear wheel drive force distribution control system or the left and right wheel drive force distribution control system.
【００４２】ステップ１０１では、ステップ１００で両
制御システムがいずれも正常と判断された時、通常の前
後輪駆動力配分制御と通常の左右輪駆動力配分制御が実
行される。In step 101, when both control systems are judged to be normal in step 100, normal front and rear wheel drive force distribution control and normal left and right wheel drive force distribution control are executed.
【００４３】ステップ１０２では、双方の制御システム
が異常かどうかが判断される。In step 102, it is judged whether both control systems are abnormal.
【００４４】ステップ１０３では、前後輪駆動力配分制
御システムのみが異常かどうかが判断される（前後輪駆
動力配分制御システム異常検出手段ｃに相当）。In step 103, it is judged whether or not only the front and rear wheel drive force distribution control system is abnormal (corresponding to the front and rear wheel drive force distribution control system abnormality detecting means c).
【００４５】ステップ１０４では、左右輪駆動力配分制
御システムのみが異常かどうかが確認される（左右輪駆
動力配分制御システム異常検出手段ｅに相当）。In step 104, it is confirmed whether or not only the left and right wheel driving force distribution control system is abnormal (corresponding to the left and right wheel driving force distribution control system abnormality detecting means e).
【００４６】ステップ１０５では、双方の制御システム
が異常の場合、あるいは、前後輪駆動力配分制御システ
ムのみが異常の場合、前後輪駆動力配分制御システムに
よる制御を解除すると共に、左右輪駆動力配分制御シス
テムによる制御を解除する指令が出力される（第１前後
輪駆動力配分制御異常対応手段ｄ１に相当）。In step 105, when both control systems are abnormal, or when only the front and rear wheel drive force distribution control system is abnormal, the control by the front and rear wheel drive force distribution control system is canceled and the left and right wheel drive force distribution systems are released. A command for canceling the control by the control system is output (corresponding to the first front / rear wheel driving force distribution control abnormality handling means d1).
【００４７】ステップ１０６では、左右輪駆動力配分制
御システムのみが異常の場合、左右輪駆動力配分制御シ
ステムによる制御を解除し、前後輪駆動力配分制御シス
テムによる制御は継続する指令が出力される（第１左右
輪駆動力配分制御異常対応手段ｆ１に相当）。In step 106, if only the left and right wheel driving force distribution control system is abnormal, the control by the left and right wheel driving force distribution control system is released, and a command for continuing the control by the front and rear wheel driving force distribution control system is output. (Corresponding to the first left / right wheel drive force distribution control abnormality response means f1).
【００４８】［両制御システム正常時］両制御システム
正常時には、図３のフローチャートにおいて、ステップ
１００→ステップ１０１へと進む流れとなり、ステップ
１０１では、通常の前後輪駆動力配分制御と通常の左右
輪駆動力配分制御が実行される。[When both control systems are normal] When both control systems are normal, the flow proceeds from step 100 to step 101 in the flowchart of FIG. 3. In step 101, normal front and rear wheel drive force distribution control and normal left and right wheels are performed. The driving force distribution control is executed.
【００４９】［両制御システム異常時］両制御システム
異常時には、図３のフローチャートにおいて、ステップ
１００→ステップ１０２→ステップ１０５へと進む流れ
となり、ステップ１０５では、前後輪駆動力配分制御シ
ステムによる制御が解除されると共に、左右輪駆動力配
分制御システムによる制御も解除される。[When both control systems are abnormal] When both control systems are abnormal, the flow proceeds from step 100 to step 102 to step 105 in the flowchart of FIG. 3. In step 105, the control by the front and rear wheel driving force distribution control system is performed. At the same time as being released, the control by the left and right wheel drive force distribution control system is also released.
【００５０】［前後輪駆動力配分制御システムのみ異常
時］前後輪駆動力配分制御システムのみ異常時には、図
３のフローチャートにおいて、ステップ１００→ステッ
プ１０２→ステップ１０３→ステップ１０５へと進む流
れとなり、ステップ１０５では、前後輪駆動力配分制御
システムによる制御が解除されると共に、左右輪駆動力
配分制御システムによる制御も解除される。したがっ
て、前後輪駆動力配分制御システムによる制御解除で駆
動ベースとなっている後輪５，６側に全ての駆動力が配
分される一定のステア特性を保つ後輪駆動状態となり、
しかも、その後輪駆動軸において差動を制限するような
左右輪駆動力配分制御も解除されることで、ステア特性
が強オーバーステアとなることが防止される。[When the front and rear wheel drive force distribution control system is abnormal] When only the front and rear wheel drive force distribution control system is abnormal, the flow proceeds from step 100 to step 102, step 103 and step 105 in the flowchart of FIG. At 105, the control by the front and rear wheel drive force distribution control system is released, and the control by the left and right wheel drive force distribution control system is also released. Therefore, when the control is released by the front and rear wheel drive force distribution control system, the rear wheel drive state is maintained in which a constant steer characteristic is maintained in which all the drive force is distributed to the rear wheels 5, 6 that are the drive base.
Moreover, the steering force characteristic is prevented from becoming strong oversteer by canceling the left-right wheel drive force distribution control that limits the differential on the rear wheel drive shaft.
【００５１】［左右輪駆動力配分制御システムのみ異常
時］左右輪駆動力配分制御システムのみ異常時には、図
３のフローチャートにおいて、ステップ１００→ステッ
プ１０２→ステップ１０３→ステップ１０４→ステップ
１０６へと進む流れとなり、ステップ１０６では、左右
輪駆動力配分制御システムによる制御は解除されるが、
前後輪駆動力配分制御システムによる制御が継続され
る。[When the left and right wheel drive force distribution control system is abnormal] When only the left and right wheel drive force distribution control system is abnormal, the flow proceeds from step 100 to step 102 to step 103 to step 104 to step 106 in the flowchart of FIG. Then, in step 106, the control by the left and right wheel drive force distribution control system is canceled,
The control by the front and rear wheel driving force distribution control system is continued.
【００５２】したがって、左右輪駆動力配分制御システ
ムの異常時においても前後輪駆動力配分制御システムの
制御が続行されることで、前後輪回転速度差と比例ゲイ
ンとにより決まる前輪側伝達駆動トルクが得られるよう
な前後輪駆動力配分制御による駆動性能や操安性が確保
される。Therefore, even when the left and right wheel drive force distribution control system is abnormal, the front and rear wheel drive force distribution control system continues to control the front wheel side transmission drive torque determined by the front and rear wheel rotation speed difference and the proportional gain. Drive performance and maneuverability are secured by the front-rear wheel drive force distribution control that is obtained.
【００５３】次に、効果を説明する。Next, the effect will be described.
【００５４】前後輪駆動力配分制御システムと差動制限
トルク制御システムが共に搭載された後輪駆動ベースの
四輪駆動車に適用される前後輪と左右輪の駆動力配分総
合制御装置において、前後輪駆動力配分制御システムの
み異常時には、前後輪駆動力配分制御システムによる制
御と共に左右輪駆動力配分制御システムによる制御も解
除し、左右輪駆動力配分制御システムのみ異常時には、
左右輪駆動力配分制御システムによる制御は解除される
が、前後輪駆動力配分制御システムによる制御は継続す
る装置としたため、前後輪駆動力配分制御システムのみ
異常な時の強オーバーステアの防止と、左右輪駆動力配
分制御システムのみ異常な時の駆動性能や操安性の確保
との両立を図ることができる。In the front-rear wheel and left-right wheel drive force integrated control device applied to a rear-wheel drive-based four-wheel drive vehicle equipped with both the front-rear wheel drive force distribution control system and the differential limiting torque control system, When only the wheel drive power distribution control system is abnormal, the control by the front and rear wheel drive power distribution control system is canceled together with the control by the left and right wheel drive power distribution control system.
Although the control by the left and right wheel drive force distribution control system is released, the control by the front and rear wheel drive force distribution control system is a continuous device, so it is possible to prevent strong oversteer when only the front and rear wheel drive force distribution control system is abnormal. Only the left and right wheel drive force distribution control system can achieve both the drive performance and the operational stability when abnormal.
【００５５】（第２実施例）第３の発明及び第４の発明
に対応する第２実施例の前後輪と左右輪の駆動力配分総
合制御装置について説明する。(Second Embodiment) A total driving force distribution control device for front and rear wheels and left and right wheels of a second embodiment corresponding to the third and fourth inventions will be described.
【００５６】まず、構成を説明する。First, the structure will be described.
【００５７】図４は第２実施例装置が適用された全体シ
ステム図で、油圧ユニット１２の構成で、ＥＴＳ制御バ
ルブ１６と並列に強制４輪駆動バルブ２６（強制４輪駆
動バルブＧに相当）を設けている点で第１実施例装置を
示す図２とは異なる。FIG. 4 is an overall system diagram to which the device of the second embodiment is applied. The hydraulic unit 12 has a structure in which a forced four-wheel drive valve 26 (corresponding to the forced four-wheel drive valve G) is provided in parallel with the ETS control valve 16. 2 is different from FIG. 2 showing the first embodiment device.
【００５８】この強制４輪駆動バルブ２６は、常閉であ
り、指令によるバルブ開作動により油圧源１５から最大
油圧がトランスファクラッチ１４へ供給され、トランス
ファクラッチ１４の完全締結により前後輪へ等配分にエ
ンジン駆動力を伝達する。The forced four-wheel drive valve 26 is normally closed, and the maximum hydraulic pressure is supplied from the hydraulic pressure source 15 to the transfer clutch 14 by the valve opening operation in accordance with the command, and the transfer clutch 14 is completely engaged so that the front and rear wheels are equally distributed. Transmits engine drive power.
【００５９】次に、作用を説明する。Next, the operation will be described.
【００６０】［制御システム異常対応制御］図５はコン
トローラ１８で行なわれる制御システム異常対応制御処
理の流れを示すフローチャートで、以下、各ステップに
ついて説明する。[Control System Abnormality Response Control] FIG. 5 is a flowchart showing the flow of the control system abnormality response control process performed by the controller 18. Each step will be described below.
【００６１】ステップ２００〜ステップ２０４は、図３
のステップ１００〜１０４の各ステップにそれぞれ対応
した同一ステップである。Steps 200 to 204 are shown in FIG.
It is the same step corresponding to each of steps 100 to 104.
【００６２】ステップ２０５では、双方の制御システム
が異常の場合、前後輪駆動力配分制御システムによる制
御を解除すると共に、左右輪駆動力配分制御システムに
よる制御を解除する指令が出力される。In step 205, when both control systems are abnormal, a command for canceling the control by the front and rear wheel driving force distribution control system and canceling the control by the left and right wheel driving force distribution control system is output.
【００６３】ステップ２０６では、前後輪駆動力配分制
御システムのみが異常の場合、前後輪駆動力配分制御シ
ステムの強制４輪駆動バルブ２６に対しバルブ開指令が
出力されると共に、左右輪駆動力配分制御システムによ
る制御を解除する指令が出力される（第２前後輪駆動力
配分制御異常対応手段ｄ２に相当）。In step 206, when only the front and rear wheel drive force distribution control system is abnormal, a valve opening command is output to the forced four-wheel drive valve 26 of the front and rear wheel drive force distribution control system and the left and right wheel drive force distribution is performed. A command for canceling the control by the control system is output (corresponding to the second front / rear wheel driving force distribution control abnormality handling means d2).
【００６４】ステップ２０７では、左右輪駆動力配分制
御システムのみが異常の場合、左右輪駆動力配分制御シ
ステムによる制御を解除し、前後輪駆動力配分制御シス
テムの強制４輪駆動バルブ２６はバルブ閉としたまま前
後輪駆動力配分制御を継続する指令が出力される（第２
左右輪駆動力配分制御異常対応手段ｆ２に相当）。In step 207, when only the left and right wheel drive force distribution control system is abnormal, the control by the left and right wheel drive force distribution control system is released, and the forced four-wheel drive valve 26 of the front and rear wheel drive force distribution control system is closed. A command to continue the front-rear wheel drive force distribution control is output (2nd
(Corresponding to the left and right wheel drive force distribution control abnormality response means f2).
【００６５】［両制御システム正常時］両制御システム
正常時には、図５のフローチャートにおいて、ステップ
２００→ステップ２０１へと進む流れとなり、ステップ
１０１では、通常の前後輪駆動力配分制御と通常の左右
輪駆動力配分制御が実行される。[When both control systems are normal] When both control systems are normal, the flow proceeds from step 200 to step 201 in the flowchart of FIG. 5. In step 101, normal front and rear wheel drive force distribution control and normal left and right wheels are performed. The driving force distribution control is executed.
【００６６】［両制御システム異常時］両制御システム
異常時には、図５のフローチャートにおいて、ステップ
２００→ステップ２０２→ステップ２０５へと進む流れ
となり、ステップ２０５では、前後輪駆動力配分制御シ
ステムによる制御が解除されると共に、左右輪駆動力配
分制御システムによる制御も解除される。[When both control systems are abnormal] When both control systems are abnormal, the flow proceeds from step 200 to step 202 to step 205 in the flowchart of FIG. 5. In step 205, the control by the front and rear wheel driving force distribution control system is performed. At the same time as being released, the control by the left and right wheel drive force distribution control system is also released.
【００６７】［前後輪駆動力配分制御システムのみ異常
時］前後輪駆動力配分制御システムのみ異常時には、図
５のフローチャートにおいて、ステップ２００→ステッ
プ２０２→ステップ２０３→ステップ２０６へと進む流
れとなり、ステップ２０６では、強制４輪駆動バルブ２
６の作動により前後輪駆動力配分を前後輪等配分状態に
されると共に、左右輪駆動力配分制御システムによる制
御が解除される。[When the front and rear wheel drive force distribution control system is abnormal] When only the front and rear wheel drive force distribution control system is abnormal, the flow proceeds from step 200 to step 202, step 203 and step 206 in the flowchart of FIG. In 206, forced four-wheel drive valve 2
By the operation of 6, the front / rear wheel drive force distribution is set to the front / rear wheel distribution state and the control by the left / right wheel drive force distribution control system is released.
【００６８】したがって、前後輪駆動力配分制御システ
ムにより駆動力が前後輪等配分される一定のステア特性
を保つリジッド４輪駆動状態となり、しかも、その後輪
駆動軸において差動を制限するような左右輪駆動力配分
制御も解除されることで、ステア特性が強オーバーステ
アとなることが防止される。Accordingly, the front and rear wheel drive force distribution control system is in a rigid four-wheel drive state in which the drive force is distributed to the front and rear wheels and maintains a constant steering characteristic. Since the wheel driving force distribution control is also canceled, the steer characteristic is prevented from becoming strong oversteer.
【００６９】［左右輪駆動力配分制御システムのみ異常
時］左右輪駆動力配分制御システムのみ異常時には、図
５のフローチャートにおいて、ステップ２００→ステッ
プ２０２→ステップ２０３→ステップ２０４→ステップ
２０７へと進む流れとなり、ステップ２０７では、左右
輪駆動力配分制御システムによる制御は解除されるが、
強制４輪駆動バルブ２６を作動させないで前後輪駆動力
配分制御システムによる制御が継続される。[When the left and right wheel drive force distribution control system is abnormal] When only the left and right wheel drive force distribution control system is abnormal, the flow proceeds to step 200 → step 202 → step 203 → step 204 → step 207 in the flowchart of FIG. Then, in step 207, the control by the left and right wheel driving force distribution control system is canceled,
The control by the front and rear wheel drive force distribution control system is continued without operating the forced four-wheel drive valve 26.
【００７０】したがって、左右輪駆動力配分制御システ
ムの異常時においても前後輪駆動力配分制御システムの
制御が続行されることで、前後輪回転速度差と比例ゲイ
ンとにより決まる前輪側伝達駆動トルクが得られるよう
な前後輪駆動力配分制御による駆動性能や操安性が確保
される。Therefore, even when the left and right wheel drive force distribution control system is abnormal, the front and rear wheel drive force distribution control system continues to control the front wheel side transmission drive torque determined by the front and rear wheel rotation speed difference and the proportional gain. Drive performance and maneuverability are secured by the front-rear wheel drive force distribution control that is obtained.
【００７１】次に、効果を説明する。Next, the effect will be described.
【００７２】強制４輪駆動バルブ２６を有する前後輪駆
動力配分制御システムと差動制限トルク制御システムが
共に搭載された後輪駆動ベースの四輪駆動車に適用され
る前後輪と左右輪の駆動力配分総合制御装置において、
前後輪駆動力配分制御システムのみ異常時には、前後輪
駆動力配分制御システム側では強制４輪駆動バルブ２６
の作動による前後輪等配分制御を行ない、左右輪駆動力
配分制御システムによる制御は解除し、左右輪駆動力配
分制御システムのみ異常時には、左右輪駆動力配分制御
システムによる制御は解除されるが、強制４輪駆動バル
ブ２６は作動させず前後輪駆動力配分制御システムによ
る通常の制御を継続する装置としたため、前後輪駆動力
配分制御システムのみ異常な時の強オーバーステアの防
止と、左右輪駆動力配分制御システムのみ異常な時の駆
動性能や操安性の確保との両立を図ることができる。Front and rear wheel drive and left and right wheel drive applied to a rear wheel drive-based four-wheel drive vehicle equipped with both a front and rear wheel drive force distribution control system having a forced four-wheel drive valve 26 and a differential limiting torque control system. In the power distribution integrated control device,
When only the front and rear wheel drive force distribution control system is abnormal, the front and rear wheel drive force distribution control system side forces the four-wheel drive valve 26.
The control by the left and right wheel drive force distribution control system is canceled and the control by the left and right wheel drive force distribution control system is canceled when the left and right wheel drive force distribution control system is abnormal. Since the forced four-wheel drive valve 26 is a device that does not operate and continues normal control by the front and rear wheel drive force distribution control system, only the front and rear wheel drive force distribution control system prevents strong oversteer when abnormal and prevents left and right wheel drive. Only in the force distribution control system, it is possible to achieve both the drive performance and the maneuverability when abnormal.
【００７３】以上、実施例を図面に基づいて説明してき
たが、具体的な構成はこの実施例に限られるものではな
い。Although the embodiment has been described above with reference to the drawings, the specific structure is not limited to this embodiment.
【００７４】例えば、実施例では、後輪駆動ベースの四
輪駆動車への適用例を示したが、前輪駆動ベースの四輪
駆動車へも適用することができる。この場合、前後輪駆
動力配分制御システムのみ異常時に前後輪駆動力配分制
御システムだけを制御解除した場合には、強アンダース
テア特性となり、本発明の異常対応制御を採用すること
により強アンダーステアとなるのを防止することができ
る。For example, in the embodiment, the example of application to the rear-wheel drive-based four-wheel drive vehicle is shown, but the invention can also be applied to the front-wheel-drive-based four-wheel drive vehicle. In this case, when only the front and rear wheel drive force distribution control system is released from control when only the front and rear wheel drive force distribution control system is in an abnormal state, strong understeer characteristics are obtained, and strong understeer is obtained by adopting the abnormality response control of the present invention. Can be prevented.
【００７５】[0075]
【発明の効果】請求項１記載の第１の発明にあっては、
前後輪駆動力配分制御システムと左右輪駆動力配分制御
システムが共に搭載された車両に適用される前後輪と左
右輪の駆動力配分総合制御装置において、走行時、左右
輪駆動力配分制御システムの異常を検出する左右輪駆動
力配分制御システム異常検出手段と、左右輪駆動力配分
制御システムのみの異常を検出した場合、左右輪駆動力
配分制御システムによる制御を解除し、前後輪駆動力配
分制御システムによる制御を継続する第１左右輪駆動力
配分制御異常対応手段を設けた装置としたため、左右輪
駆動力配分制御システムのみの異常時、前後輪駆動力配
分制御による駆動性能や操安性を確保することができる
という効果が得られる。 According to the first invention of claim 1,
In the driving force distribution integrated control system of the front and rear wheels and right wheels front and rear wheel driving force distribution control system and the left and right wheel driving force distribution control system is applied to both on-board the vehicle, during travel, the right and left
Left and right wheel drive to detect abnormality of wheel drive force distribution control system
Force distribution control system abnormality detection means and left and right wheel drive force distribution
Left and right wheel drive force when an abnormality of only the control system is detected
Release the control by the distribution control system and distribute the front and rear wheel drive force.
Minute left and right wheel drive force to continue control by minute control system
Since the device is provided with means for dealing with distribution control abnormality , the left and right wheels
When there is an abnormality in the drive force distribution control system only, front and rear wheel drive force distribution
Driving performance and maneuverability can be secured by minute control
The effect is obtained.
【００７６】請求項２記載の第２の発明にあっては、前
後輪駆動力配分制御システムと左右輪駆動力配分制御シ
ステムが共に搭載された車両に適用される前後輪と左右
輪の駆動力配分総合制御装置において、走行時、左右輪
駆動力配分制御システムの異常を検出する左右輪駆動力
配分制御システム異常検出手段と、走行時、前後輪駆動
力配分制御システムの異常を検出する前後輪駆動力配分
制御システム異常検出手段と、を有し、左右輪駆動力配
分制御システムのみの異常を検出した場合、左右輪駆動
力配分制御システムによる制御を解除し、前後輪駆動力
配分制御システムによる制御を継続する第１左右輪駆動
力配分制御異常対応手段と、前後輪駆動力配分制御シス
テムのみの異常を検出した場合、前後輪駆動力配分制御
システムによる制御を解除すると共に左右輪駆動力配分
制御システムによる制御を解除する第１前後輪駆動力配
分制御異常対応手段と、を設けた装置としたため、左右
輪駆動力配分制御システムのみの異常時、前後輪駆動力
配分制御による駆動性能や操安性を確保することができ
るという効果が得られると共に、前後輪駆動力配分制御
システムのみの異常時、ステア特性が強オーバーステア
あるいは強アンダーステアとなるのを防止することがで
きるという効果が得られる。According to the second aspect of the present invention, the front and rear wheels and the left and right wheels are applied to a vehicle equipped with both the front and rear wheels driving force distribution control system and the left and right wheels driving force distribution control system. In the integrated distribution control device, left and right wheel drive force distribution control system abnormality detection means for detecting an abnormality in the left and right wheel drive force distribution control system during traveling, and front and rear wheel drive during traveling
Front / rear wheel drive force distribution for detecting abnormality of force distribution control system
The control system abnormality detection means is provided, and when an abnormality of only the left and right wheel drive force distribution control system is detected, the control by the left and right wheel drive force distribution control system is canceled and the control by the front and rear wheel drive force distribution control system is continued. First left / right wheel drive force distribution control abnormality response means and front / rear wheel drive force distribution control system
System, front and rear wheel drive force distribution control
Disengage control from the system and distribute left and right wheel drive force
First front and rear wheel drive force distribution that releases control by the control system
Since the device including the minute control abnormality responding means is provided, the effect that the driving performance and the maneuverability can be secured by the front and rear wheel driving force distribution control when the left and right wheel driving force distribution control system is abnormal. Together with front and rear wheel drive force distribution control
Steer characteristic is strong when the system is abnormal.
Alternatively, it is possible to prevent strong understeer.
The effect of being able to do is obtained .
【００７７】請求項３記載の第３の発明にあっては、強
制４輪駆動バルブを有する前後輪駆動力配分制御システ
ムと左右輪駆動力配分制御システムが共に搭載された車
両に適用される前後輪と左右輪の駆動力配分総合制御装
置において、走行時、前後輪駆動力配分制御システムの
異常を検出する前後輪駆動力配分制御システム異常検出
手段と、前後輪駆動力配分制御システムのみの異常を検
出した場合、前後輪駆動力配分制御システムの強制４輪
駆動バルブを作動させると共に左右輪駆動力配分制御シ
ステムによる制御を解除する第２前後輪駆動力配分制御
異常対応手段を設けた装置としたため、前後輪駆動力配
分制御システムのみの異常時、ステア特性が強オーバー
ステアあるいは強アンダーステアとなるのを防止するこ
とができるという効果が得られる。According to the third aspect of the present invention, before and after being applied to a vehicle equipped with both the front and rear wheel drive force distribution control system having the forced four-wheel drive valve and the left and right wheel drive force distribution control system. The front and rear wheel drive force distribution control system abnormality detecting means for detecting an abnormality in the front and rear wheel drive force distribution control system during traveling in the integrated drive force distribution control device for the front and rear wheels and the front and rear wheel drive force distribution control system only. And a device provided with a second front and rear wheel drive force distribution control abnormality responding means for activating the forced four-wheel drive valve of the front and rear wheel drive force distribution control system and canceling the control by the left and right wheel drive force distribution control system. Therefore, it is possible to prevent the steer characteristic from becoming strong oversteer or strong understeer when only the front and rear wheel drive force distribution control system is abnormal. Results can be obtained.
【００７８】請求項４記載の第４の発明にあっては、強
制４輪駆動バルブを有する前後輪駆動力配分制御システ
ムと左右輪駆動力配分制御システムが共に搭載された車
両に適用される前後輪と左右輪の駆動力配分総合制御装
置において、走行時、左右輪駆動力配分制御システムの
異常を検出する左右輪駆動力配分制御システム異常検出
手段と、左右輪駆動力配分制御システムのみの異常を検
出した場合、左右輪駆動力配分制御システムによる制御
を解除し、前後輪駆動力配分制御システムの強制４輪駆
動バルブを作動させずに前後輪駆動力配分制御を継続す
る第２左右輪駆動力配分制御異常対応手段を設けた装置
としたため、左右輪駆動力配分制御システムのみの異常
時、前後輪駆動力配分制御による駆動性能や操安性を確
保することができるという効果が得られる。According to a fourth aspect of the present invention, before and after being applied to a vehicle equipped with both a front and rear wheel drive force distribution control system having a forced four-wheel drive valve and a left and right wheel drive force distribution control system. In the comprehensive control system for the driving force distribution between the left and right wheels, the left and right wheel driving force distribution control system abnormality detecting means for detecting an abnormality in the left and right wheel driving force distribution control system during traveling, and the abnormality only in the left and right wheel driving force distribution control system 2nd left and right wheel drive that releases the control by the left and right wheel drive force distribution control system and continues the front and rear wheel drive force distribution control without operating the forced four-wheel drive valve of the front and rear wheel drive force distribution control system. Since the device is equipped with a force distribution control abnormality responding means, it is possible to secure driving performance and maneuverability by front and rear wheel drive force distribution control when there is an abnormality in only the left and right wheel drive force distribution control system. The effect is obtained that.
【図１】本発明の前後輪と左右輪の駆動力配分総合制御
装置を示すクレーム対応図である。FIG. 1 is a claim correspondence diagram showing a front and rear wheel and left and right wheel driving force distribution integrated control device of the present invention.
【図２】第１実施例の前後輪と左右輪の駆動力配分総合
制御装置が適用された後輪駆動ベースの四輪駆動車を示
す全体システム図である。FIG. 2 is an overall system diagram showing a rear-wheel drive-based four-wheel drive vehicle to which the front-rear wheel and left-right wheel driving force distribution comprehensive control device of the first embodiment is applied.
【図３】第１実施例装置のコントローラで行なわれる制
御システム異常対応制御処理の流れを示すフローチャー
トである。FIG. 3 is a flowchart showing a flow of control system abnormality handling control processing performed by the controller of the first embodiment device.
【図４】第２実施例の前後輪と左右輪の駆動力配分総合
制御装置が適用された後輪駆動ベースの四輪駆動車を示
す全体システム図である。FIG. 4 is an overall system diagram showing a rear-wheel-drive-based four-wheel drive vehicle to which a front / rear wheel and left / right wheel driving force distribution comprehensive control device according to a second embodiment is applied.
【図５】第２実施例装置のコントローラで行なわれる制
御システム異常対応制御処理の流れを示すフローチャー
トである。FIG. 5 is a flowchart showing a flow of control system abnormality handling control processing performed by the controller of the second embodiment device.
ａ 前後輪駆動力配分制御システム ｂ 左右輪駆動力配分制御システム ｃ 前後輪駆動力配分制御システム異常検出手段 ｄ１ 第１前後輪駆動力配分制御異常対応手段 ｄ２ 第２前後輪駆動力配分制御異常対応手段 ｅ 左右輪駆動力配分制御システム異常検出手段 ｆ１ 第１左右輪駆動力配分制御異常対応手段 ｆ２ 第１左右輪駆動力配分制御異常対応手段 a Front and rear wheel drive force distribution control system b Left and right wheel drive force distribution control system c Front and rear wheel drive force distribution control system abnormality detection means d1 First front / rear wheel drive force distribution control abnormality response means d2 second front and rear wheel drive force distribution control abnormality response means e Left and right wheel drive force distribution control system abnormality detection means f1 First left / right wheel drive force distribution control abnormality response means f2 First left / right wheel drive force distribution control abnormality response means
Claims (4)
両の走行状態に応じて前後輪への駆動力配分を制御する
前後輪駆動力配分制御システムと、 車両の走行状態に応じて左右輪への駆動力配分を制御す
る左右輪駆動力配分制御システムと、走行時、左右輪駆動力配分制御システムの異常を検出す
る左右輪駆動力配分制御システム異常検出手段と、 左右輪駆動力配分制御システムのみの異常を検出した場
合、左右輪駆動力配分制御システムによる制御を解除
し、前後輪駆動力配分制御システムによる制御を継続す
る第１左右輪駆動力配分制御異常対応手段と、 を備えていることを特徴とする前後輪と左右輪の駆動力
配分総合制御装置。1. A vehicle using one of front and rear wheels as a drive base.
Controls the distribution of driving force to the front and rear wheels according to the traveling state of both
Front and rear wheel drive force distribution control system, Controls the distribution of driving force to the left and right wheels according to the running condition of the vehicle
Left and right wheel drive force distribution control system,Detects an abnormality in the left and right wheel drive force distribution control system during driving
Left and right wheel drive force distribution control system abnormality detection means, If an abnormality is detected only in the left and right wheel drive force distribution control system,
The control by the left and right wheel drive force distribution control system
Control by the front and rear wheel drive force distribution control system
First left and right wheel drive force distribution control abnormality response means, Driving force of front and rear wheels and left and right wheels characterized by being equipped with
Total distribution control device.
定の車両状態に応じて前後輪への駆動力配分を制御する
前後輪駆動力配分制御システムと、 所定の車両状態に応じて左右輪への駆動力配分を制御す
る左右輪駆動力配分制御システムと、を搭載し、 走行時、左右輪駆動力配分制御システムの異常を検出す
る左右輪駆動力配分制御システム異常検出手段と、走行時、前後輪駆動力配分制御システムの異常を検出す
る前後輪駆動力配分制御システム異常検出手段と、を有
し、 左右輪駆動力配分制御システムのみの異常を検出した場
合、左右輪駆動力配分制御システムによる制御を解除
し、前後輪駆動力配分制御システムによる制御を継続す
る第１左右輪駆動力配分制御異常対応手段と、前後輪駆動力配分制御システムのみの異常を検出した場
合、前後輪駆動力配分制御システムによる制御を解除す
ると共に左右輪駆動力配分制御システムによる制御を解
除する第１前後輪駆動力配分制御異常対応手段と、 を備えていることを特徴とする前後輪と左右輪の駆動力
配分総合制御装置。2. A place where one of the front and rear wheels is used as a drive base
Controls driving force distribution to the front and rear wheels according to a fixed vehicle condition
Front and rear wheel drive force distribution control system, Controls the distribution of driving force to the left and right wheels according to a predetermined vehicle condition
Left and right wheel drive force distribution control system,Equipped with Detects an abnormality in the left and right wheel drive force distribution control system during driving
Left and right wheel drive force distribution control system abnormality detection means,Detects an abnormality in the front and rear wheel drive force distribution control system during driving
Front and rear wheel drive force distribution control system abnormality detection means.
Then If an abnormality is detected only in the left and right wheel drive force distribution control system,
The control by the left and right wheel drive force distribution control system
Control by the front and rear wheel drive force distribution control system
First left and right wheel drive force distribution control abnormality response means,If an abnormality is detected only in the front and rear wheel drive force distribution control system,
The front and rear wheel drive force distribution control system
And control the left and right wheel drive force distribution control system.
First front and rear wheel drive force distribution control abnormality handling means for removing Driving force of front and rear wheels and left and right wheels characterized by being equipped with
Total distribution control device.
とする強制４輪駆動バルブを有し、前後輪の一方を駆動
ベースとしながら所定の車両状態に応じて前後輪への駆
動力配分を制御する前後輪駆動力配分制御システムと、 所定の車両状態に応じて左右輪への駆動力配分を制御す
る左右輪駆動力配分制御システムと、 走行時、前後輪駆動力配分制御システムの異常を検出す
る前後輪駆動力配分制御システム異常検出手段と、 前後輪駆動力配分制御システムのみの異常を検出した場
合、前後輪駆動力配分制御システムの強制４輪駆動バル
ブを作動させると共に左右輪駆動力配分制御システムに
よる制御を解除する第２前後輪駆動力配分制御異常対応
手段と、 を備えていることを特徴とする前後輪と左右輪の駆動力
配分総合制御装置。3. A forced four-wheel drive valve forcibly setting a distribution state such as four wheels according to a control command, wherein one of the front and rear wheels is used as a drive base and the driving force is distributed to the front and rear wheels according to a predetermined vehicle state. Front and rear wheel drive force distribution control system for controlling the front and rear wheels, left and right wheel drive force distribution control system for controlling the drive force distribution to the left and right wheels according to a predetermined vehicle state, and an abnormality in the front and rear wheel drive force distribution control system during traveling. Front and rear wheel drive force distribution control system abnormality detection means, and when an abnormality is detected only in the front and rear wheel drive force distribution control system, the forced four-wheel drive valve of the front and rear wheel drive force distribution control system is operated and the left and right wheel drive systems are operated. A front-rear-wheel and left-right wheel driving force distribution comprehensive control device comprising: a second front-rear wheel driving force distribution control abnormality responding means for canceling control by the force distribution control system.
とする強制４輪駆動バルブを有し、前後輪の一方を駆動
ベースとしながら車両の走行状態に応じて前後輪への駆
動力配分を制御する前後輪駆動力配分制御システムと、 車両の走行状態に応じて左右輪への駆動力配分を制御す
る左右輪駆動力配分制御システムと、 走行時、左右輪駆動力配分制御システムの異常を検出す
る左右輪駆動力配分制御システム異常検出手段と、 左右輪駆動力配分制御システムのみの異常を検出した場
合、左右輪駆動力配分制御システムによる制御を解除
し、前後輪駆動力配分制御システムの強制４輪駆動バル
ブを作動させずに前後輪駆動力配分制御を継続する第２
左右輪駆動力配分制御異常対応手段と、 を備えていることを特徴とする前後輪と左右輪の駆動力
配分総合制御装置。4. A forced four-wheel drive valve forcibly bringing four wheels or the like into a distributed state according to a control command, and one side of the front and rear wheels is used as a drive base to distribute the driving force to the front and rear wheels according to the running state of the vehicle. Front and rear wheel drive force distribution control system, and left and right wheel drive force distribution control system that controls the drive force distribution to the left and right wheels according to the running state of the vehicle. Left and right wheel drive force distribution control system abnormality detection means, and when an abnormality is detected only in the left and right wheel drive force distribution control system, the control by the left and right wheel drive force distribution control system is canceled, and the front and rear wheel drive force distribution control system is released. 2nd to continue the front / rear wheel drive force distribution control without activating the forced 4 wheel drive valve
A driving force distribution comprehensive control device for front and rear wheels and left and right wheels, comprising: means for responding to abnormality in left and right wheel drive force distribution control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01909794A JP3451695B2 (en) | 1994-02-16 | 1994-02-16 | Driving force distribution control system for front and rear wheels and left and right wheels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01909794A JP3451695B2 (en) | 1994-02-16 | 1994-02-16 | Driving force distribution control system for front and rear wheels and left and right wheels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07228169A JPH07228169A (en) | 1995-08-29 |
| JP3451695B2 true JP3451695B2 (en) | 2003-09-29 |
Family
ID=11989977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01909794A Expired - Lifetime JP3451695B2 (en) | 1994-02-16 | 1994-02-16 | Driving force distribution control system for front and rear wheels and left and right wheels |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3451695B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4969936B2 (en) * | 2006-07-28 | 2012-07-04 | 富士重工業株式会社 | Vehicle driving force distribution control device |
| WO2012005256A1 (en) * | 2010-07-09 | 2012-01-12 | 日産自動車株式会社 | Drive power distribution control device for four wheel drive vehicle |
-
1994
- 1994-02-16 JP JP01909794A patent/JP3451695B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07228169A (en) | 1995-08-29 |
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