JPH07277024A - Differential limiting controller - Google Patents
Differential limiting controllerInfo
- Publication number
- JPH07277024A JPH07277024A JP7343694A JP7343694A JPH07277024A JP H07277024 A JPH07277024 A JP H07277024A JP 7343694 A JP7343694 A JP 7343694A JP 7343694 A JP7343694 A JP 7343694A JP H07277024 A JPH07277024 A JP H07277024A
- Authority
- JP
- Japan
- Prior art keywords
- wheel speed
- front wheel
- differential
- speed sensor
- vehicle
- 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.)
- Pending
Links
- 230000006866 deterioration Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
- Retarders (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、全車輪速センサの内、
少なくとも一対の左前輪車輪速センサと右前輪車輪速セ
ンサ又は、一対の左後輪車輪速センサと右後輪車輪速セ
ンサと、コントロールユニットと該コントロ−ルユニッ
トからの制御信号に応じて差動制限トルクの大きさを制
御することの出来る差動制限付きディファレンシャルと
からなる差動制限制御装置に関する。BACKGROUND OF THE INVENTION The present invention relates to an all wheel speed sensor,
At least a pair of left front wheel speed sensor and a right front wheel speed sensor, or a pair of left rear wheel speed sensor and a right rear wheel speed sensor, and a differential limit according to a control signal from the control unit and the control unit. The present invention relates to a differential limiting control device including a differential with differential limiting capable of controlling the magnitude of torque.
【０００２】[0002]
【従来の技術】従来の普通デフ装着車においては、高速
の旋回時には横加速度が増大し、内側車輪の接地力が減
少するため内側車輪がスリップを起こし車両に駆動力を
伝えることが出来なくなるのに対して、差動制限装置を
有する車両においては駆動力の多くが外輪に伝達される
ので車両はさらに加速を続けることが出来る。2. Description of the Related Art In a conventional vehicle equipped with a normal differential gear, the lateral acceleration increases during high-speed turning, and the ground contact force of the inner wheels decreases, so that the inner wheels slip and cannot transmit the driving force to the vehicle. On the other hand, in a vehicle having a differential limiting device, most of the driving force is transmitted to the outer wheels, so that the vehicle can continue to accelerate.
【０００３】しかし、低速の旋回時には旋回内輪より外
輪の方が速く回転するので、走行トルクは旋回内輪の方
が外輪よりも大きくなる。したがって左右輪のトルク差
（差動制限トルク）によって生じるモーメント（アンダ
ステアモーメント）が車両の旋回を妨げる方向に働いて
いた。However, since the outer wheel rotates faster than the inner wheel when turning at a low speed, the running torque of the inner wheel becomes larger than that of the outer wheel. Therefore, the moment (understeer moment) generated by the torque difference between the left and right wheels (differential limiting torque) acts in the direction in which the turning of the vehicle is hindered.
【０００４】[0004]
【発明が解決しようとする課題】そこで本発明では差動
制限トルクを任意に変化させることの出来る車両におい
て、低速旋回時に差動制限トルクを下げることで、差動
制限トルクにより発生するアンダステアモーメントを抑
制し、円滑な旋回を可能にし、操縦性悪化を防止するこ
とを目的とする。Therefore, in the present invention, in a vehicle in which the differential limiting torque can be arbitrarily changed, the differential limiting torque is lowered during low-speed turning, and the understeer moment generated by the differential limiting torque is reduced. The purpose of this is to suppress the steering, to enable smooth turning, and to prevent deterioration of maneuverability.
【０００５】[0005]
【課題を解決するための手段】本発明によれば、全車輪
速センサの内、少なくとも一対の左前輪車輪速センサと
右前輪車輪速センサ又は、一対の左後輪車輪速センサと
右後輪車輪速センサとコントロールユニットと該コント
ロ−ルユニットからの制御信号に応じて差動制限トルク
の大きさを制御することの出来る差動制限付きディファ
レンシャルとからなる差動制限制御装置において、前記
コントロールユニットでは前記左前輪車輪速センサと右
前輪車輪速センサからの車輪速情報を元に車速を検出す
る機能と、前輪車輪速差を検出する機能と、前記車速が
所定車速以下で且つ前記前輪車輪速差が所定車輪速差以
上の時に差動制限トルクを下げる機能を有している。According to the present invention, of all wheel speed sensors, at least a pair of left front wheel speed sensor and right front wheel speed sensor or a pair of left rear wheel speed sensor and right rear wheel. In a differential limiting control device comprising a wheel speed sensor, a control unit, and a differential limited differential capable of controlling the magnitude of the differential limiting torque according to a control signal from the control unit, the control unit A function of detecting the vehicle speed based on the wheel speed information from the left front wheel speed sensor and the right front wheel speed sensor, a function of detecting the front wheel speed difference, and the vehicle speed not more than a predetermined vehicle speed and the front wheel speed difference. Has a function of reducing the differential limiting torque when the wheel speed difference is equal to or more than a predetermined wheel speed difference.
【０００６】[0006]
【作用】本発明は上記のように構成されているので、コ
ントロールユニットでは左前輪車輪速センサと右前輪車
輪速センサからの車輪速情報を元に車速および、前輪車
輪速差を検出することが出来、車速が所定車速以下で、
且つ前輪車輪速差が所定車輪速差以上の時に差動制限ト
ルクを下げることが出来る。Since the present invention is configured as described above, the control unit can detect the vehicle speed and the front wheel speed difference based on the wheel speed information from the left front wheel speed sensor and the right front wheel speed sensor. Yes, the vehicle speed is less than the predetermined vehicle speed,
Moreover, the differential limiting torque can be reduced when the front wheel speed difference is equal to or larger than the predetermined wheel speed difference.
【０００７】[0007]
【実施例】以下、本発明の実施例を添付図面によって説
明する。図１及び図２において、車両の左前輪１には左
前輪車輪速センサ７が設けられ、右前輪２には右前輪車
輪速センサ８が設けられ、コントロールユニットに配線
９により接続されている。またエンジン１０の駆動力は
トランスミッション１１、プロペラシャフト１２を介し
て駆動軸１３の差動装置１４のピニオン１４ａに伝達さ
れ、サイドギア１４ｂ、１４ｃを介して左後輪３と右後
輪４に分配される。Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2, a left front wheel wheel speed sensor 7 is provided on the left front wheel 1 of the vehicle, a right front wheel wheel speed sensor 8 is provided on the right front wheel 2, and is connected to a control unit by a wire 9. The driving force of the engine 10 is transmitted to the pinion 14a of the differential device 14 of the drive shaft 13 via the transmission 11 and the propeller shaft 12, and is distributed to the left rear wheel 3 and the right rear wheel 4 via the side gears 14b and 14c. It
【０００８】次に図２を参照して、前記差動装置１４は
前記サイドギア１４ｃとギアケース１４ｄの間に同心の
多板のパイロットクラッチ５３と多板のメインクラッチ
５１と前記多板のパイロットクラッチ５３の接続力を倍
力して前記メインクラッチ５１に伝えるカム５５を有
し、またパイロットクラッチ５３には電磁コイル５７が
対峙しており、該電磁コイル５７は前記コントロールユ
ニットからの制御信号により励磁電圧の大きさが制御さ
れ、パイロットクラッチ５３の接続力を変化させること
が出来る。Next, referring to FIG. 2, the differential device 14 includes a multi-plate pilot clutch 53, a multi-plate main clutch 51, and the multi-plate pilot clutch which are concentric between the side gear 14c and the gear case 14d. It has a cam 55 that boosts the connecting force of 53 to transmit it to the main clutch 51, and an electromagnetic coil 57 faces the pilot clutch 53. The electromagnetic coil 57 is excited by a control signal from the control unit. The magnitude of the voltage is controlled, and the connecting force of the pilot clutch 53 can be changed.
【０００９】次に図３をも使って制御フローを説明す
る。まずスタートして、ステップ１において左前輪車輪
速センサ７と右前輪車輪速センサ８から右前輪車輪速と
左前輪車輪速の情報をコントロールユニット６が読み込
み次にステップ２に移り、右前輪車輪速と左前輪車輪速
の平均値を以て車速Ｖを算出する。次にステップ３に移
り、右前輪車輪速と左前輪車輪速との差を以て前輪車輪
速差ΔＶを算出する。Next, the control flow will be described with reference to FIG. First, in step 1, the control unit 6 reads the information on the right front wheel speed and the left front wheel speed from the left front wheel speed sensor 7 and the right front wheel speed sensor 8 in step 1, and then proceeds to step 2 to move the right front wheel speed. Then, the vehicle speed V is calculated from the average value of the wheel speeds of the left front wheels. Next, in step 3, the front wheel speed difference ΔV is calculated from the difference between the right front wheel speed and the left front wheel speed.
【００１０】そしてステップ４に移り、前記車速Ｖが所
定車速Ｖ0 以下であるか否かを判断して、所定車速を超
える場合はそのままリターンまで進み、初期状態に戻
る。Then, in step 4, it is judged whether or not the vehicle speed V is equal to or lower than a predetermined vehicle speed V 0. If the vehicle speed exceeds the predetermined vehicle speed, the process proceeds directly to return and returns to the initial state.
【００１１】車速Ｖが所定車速Ｖ0 以下の場合はステッ
プ５に移り前輪車輪速差ΔＶが所定車輪速差ΔＶ0 以上
であるか否かを判断し、前輪車輪速差ΔＶが所定車輪速
差ΔＶ0 に満たない場合はそのままリターンまで進み、
初期状態に戻る。When the vehicle speed V is less than the predetermined vehicle speed V 0, the routine proceeds to step 5, where it is judged whether or not the front wheel speed difference ΔV is not less than the predetermined wheel speed difference ΔV 0 , and the front wheel speed difference ΔV is the predetermined wheel speed difference. If it is less than ΔV 0 , proceed directly to return,
Return to the initial state.
【００１２】前輪車輪速差ΔＶが所定車輪速差ΔＶ0 以
上である場合は、ステップ６に移り、コントロールユニ
ット６からの制御信号（車速Ｖ及び前輪車輪速差ΔＶの
絶対値に逆比例した電流が出力される。）により電磁コ
イル５７に電流が流れその電流値に応じてパイロットク
ラッチは緩められ、カム５５を介してメインクラッチが
緩められると差動制限トルクＴは下げられるとリターン
となり制御は初期状態に戻される。If the front wheel speed difference ΔV is greater than or equal to the predetermined wheel speed difference ΔV 0 , the process proceeds to step 6 and a control signal from the control unit 6 (a current that is inversely proportional to the absolute values of the vehicle speed V and the front wheel speed difference ΔV). Is output), a current flows through the electromagnetic coil 57, the pilot clutch is loosened according to the current value, and when the main clutch is loosened via the cam 55, the differential limiting torque T is reduced and the control returns to return. It is returned to the initial state.
【００１３】（図１及び図３の一部を変更（センサ２個
削除／Ｓ７を追加）しました。ご審議ください。）(Part of Figures 1 and 3 has been changed (2 sensors deleted / S7 added). Please discuss.)
【００１４】[0014]
【発明の効果】本発明は以上説明したように構成されて
いるので、コントロールユニットでは左前輪車輪速セン
サと右前輪車輪速センサからの車輪速情報を元に車速お
よび、前輪車輪速差を検出することが出来、車速が所定
車速以下で、且つ前輪車輪速差が所定車輪速差以上、即
ち低速で急旋回の時にコントロールユニットからの制御
信号（車速Ｖ及び前輪車輪速差ΔＶの絶対値に逆比例し
た電流が出力される。）により電磁コイルに電流が流れ
その電流値に応じてパイロットクラッチは緩められ、カ
ムを介してメインクラッチが緩められ、差動制限トルク
を下げることが出来る。このようにして差動制限トルク
を下げると差動制限トルクにより発生するアンダステア
モーメントを抑制し、円滑な旋回を可能にし、操縦性悪
化を防止することが出来る。また高速旋回で前輪車輪速
差が小さな場合は従来の差動制限装置つきデフと同じよ
うに、駆動力の多くが外輪に伝達されるので車両はさら
に加速を続けることが出来る。Since the present invention is configured as described above, the control unit detects the vehicle speed and the front wheel speed difference based on the wheel speed information from the left front wheel speed sensor and the right front wheel speed sensor. When the vehicle speed is equal to or lower than the predetermined vehicle speed and the front wheel speed difference is equal to or higher than the predetermined wheel speed difference, that is, when the vehicle makes a sharp turn at a low speed, the control signal from the control unit (the absolute value of the vehicle speed V and the front wheel speed difference ΔV is set to the absolute value). Inversely proportional current is output.), A current flows through the electromagnetic coil, the pilot clutch is loosened according to the current value, the main clutch is loosened via the cam, and the differential limiting torque can be reduced. When the differential limiting torque is reduced in this way, the understeer moment generated by the differential limiting torque is suppressed, smooth turning is enabled, and deterioration of maneuverability can be prevented. Further, when the vehicle is turning at a high speed and the wheel speed difference between the front wheels is small, much of the driving force is transmitted to the outer wheels as in the conventional differential with a differential limiting device, so that the vehicle can continue to accelerate.
【図１】実施例の全体構成図FIG. 1 is an overall configuration diagram of an embodiment.
【図２】実施例の差動制限装置を含む作動装置の断面図FIG. 2 is a sectional view of an actuator including a limited slip differential device according to an embodiment.
【図３】実施例の制御フロー図FIG. 3 is a control flow chart of the embodiment.
１・・・左前輪 ２・・・右前輪 ３・・・左後輪 ４・・・右後輪 ５・・・差動制限装置 ６・・・コントロールユニット ７・・・左前輪車輪速センサ ８・・・右前輪車輪速センサ １３・・・駆動軸 １４・・・差動装置 １４ａ・・・ピニオン １４ｂ、１４ｃ・・・サイドギア １４ｄ・・・ギアケース ５１・・・メインクラッチ ５３・・・パイロットクラッチ ５５・・・カム ５７・・・電磁コイル 1 ... left front wheel 2 ... right front wheel 3 ... left rear wheel 4 ... right rear wheel 5 ... differential limiting device 6 ... control unit 7 ... left front wheel wheel speed sensor 8 ... right front wheel speed sensor 13 ... drive shaft 14 ... differential device 14a ... pinion 14b, 14c ... side gear 14d ... gear case 51 ... main clutch 53 ... pilot Clutch 55 ... Cam 57 ... Electromagnetic coil
Claims (1)
前輪車輪速センサと右前輪車輪速センサ又は、一対の左
後輪車輪速センサと右後輪車輪速センサと、コントロー
ルユニットと該コントロ−ルユニットからの制御信号に
応じて差動制限トルクの大きさを制御することの出来る
差動制限付きディファレンシャルとからなる差動制限制
御装置において、前記コントロールユニットでは前記左
前輪車輪速センサと右前輪車輪速センサからの車輪速情
報を元に車速を検出する機能と、前輪車輪速差を検出す
る機能と、前記車速が所定車速以下で且つ前記前輪車輪
速差が所定車輪速差以上の時に差動制限トルクを下げる
機能を有することを特徴とする差動制限制御装置。Claim: What is claimed is: 1. Among all wheel speed sensors, at least a pair of left front wheel speed sensor and right front wheel speed sensor, or a pair of left rear wheel speed sensor and right rear wheel speed sensor, a control unit and the controller. A differential limiting control device comprising a differential limited differential capable of controlling the magnitude of the differential limiting torque in accordance with a control signal from the control unit, wherein the control unit includes the left front wheel speed sensor and the right front wheel. A function of detecting a vehicle speed based on wheel speed information from a wheel speed sensor, a function of detecting a front wheel speed difference, and a difference when the vehicle speed is equal to or lower than a predetermined vehicle speed and the front wheel speed difference is equal to or higher than a predetermined wheel speed difference. A differential limiting control device having a function of reducing a dynamic limiting torque.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7343694A JPH07277024A (en) | 1994-04-12 | 1994-04-12 | Differential limiting controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7343694A JPH07277024A (en) | 1994-04-12 | 1994-04-12 | Differential limiting controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07277024A true JPH07277024A (en) | 1995-10-24 |
Family
ID=13518197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7343694A Pending JPH07277024A (en) | 1994-04-12 | 1994-04-12 | Differential limiting controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07277024A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002031210A (en) * | 2000-07-12 | 2002-01-31 | Tochigi Fuji Ind Co Ltd | Differential gear |
| JP2006046595A (en) * | 2004-08-06 | 2006-02-16 | Ｇｋｎ ドライブライン トルクテクノロジー株式会社 | Differential rotation control system |
-
1994
- 1994-04-12 JP JP7343694A patent/JPH07277024A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002031210A (en) * | 2000-07-12 | 2002-01-31 | Tochigi Fuji Ind Co Ltd | Differential gear |
| JP2006046595A (en) * | 2004-08-06 | 2006-02-16 | Ｇｋｎ ドライブライン トルクテクノロジー株式会社 | Differential rotation control system |
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