JPH035462Y2 - - Google Patents
Info
- Publication number
- JPH035462Y2 JPH035462Y2 JP1984125904U JP12590484U JPH035462Y2 JP H035462 Y2 JPH035462 Y2 JP H035462Y2 JP 1984125904 U JP1984125904 U JP 1984125904U JP 12590484 U JP12590484 U JP 12590484U JP H035462 Y2 JPH035462 Y2 JP H035462Y2
- Authority
- JP
- Japan
- Prior art keywords
- wheel drive
- acceleration
- angular velocity
- steering wheel
- reference value
- 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
Links
- 230000001133 acceleration Effects 0.000 claims description 35
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、車両の走行状態に応じた最適の駆動
状態を判断し、自動的に二輪駆動と四輪駆動の切
換えをすることができる四輪駆動の自動切換制御
装置に関する。[Detailed description of the invention] Industrial application field The present invention is a four-wheel drive system that can automatically switch between two-wheel drive and four-wheel drive by determining the optimal drive state according to the driving condition of the vehicle. This invention relates to an automatic switching control device.
従来の技術
従来においては、運転者の判断により手動で二
輪駆動と四輪駆動とを切換えることができる四輪
駆動車はあつたが、走行状態に対応して自動的に
駆動状態を切換えられるものはなかつた。Conventional Technology In the past, there were four-wheel drive vehicles in which the driver could manually switch between two-wheel drive and four-wheel drive at the discretion of the driver, but there are four-wheel drive vehicles that can automatically switch the drive state depending on the driving condition. I stopped talking.
考案が解決しようとする課題
従つて、従来の四輪駆動車のように走行状態を
運転者が判断して四輪駆動に手動で切換えるもの
では運転操作が煩わしく、また、運転者の判断に
は個人差があるため、走行状態に適応した切換え
が必ずしも適切に実施されるとは限らなかつた。
このため、必ずしも四輪駆動を必要としない場合
に四輪駆動で走行して燃費を悪化させたり、ある
いは四輪駆動が好ましいにもかかわらず二輪駆動
で走行して走行安定性を確保できないこともあつ
た。Problems that the invention aims to solve Therefore, with conventional four-wheel drive vehicles in which the driver judges the driving conditions and manually switches to four-wheel drive, driving operations are cumbersome, and the driver's judgment is not sufficient. Due to individual differences, switching adapted to the driving conditions was not always carried out appropriately.
For this reason, driving in four-wheel drive when four-wheel drive is not necessarily required may worsen fuel efficiency, or driving in two-wheel drive even though four-wheel drive is preferable may not ensure driving stability. It was hot.
そこで、本考案は、走行状態に対応して二輪駆
動及び四輪駆動の駆動状態から適切なものを選択
し、自動的に切換えるようにする四輪駆動車の自
動切換制御装置を提供することを目的とする。 Therefore, the present invention aims to provide an automatic switching control device for a four-wheel drive vehicle that selects an appropriate drive state from two-wheel drive and four-wheel drive according to the driving state and automatically switches between the two-wheel drive and four-wheel drive states. purpose.
課題を解決するための手段
本考案は、前述の課題を解決するもので、ハン
ドル操作により生ずるハンドル角速度を検出する
ハンドル角速度センサと、同ハンドル角速度セン
サからの出力信号が予め記憶された基準値を越え
るか否かを判定するハンドル角速度判定手段と、
車体における前後、左右、上下方向の加速度を検
出する加速度センサと、同加速度センサからの出
力信号のうち上記前後、左右、上下方向の加速度
を示す少なくとも１つが予め記憶された基準値を
越えたか否かを判定する加速度判定手段と、上記
ハンドル角速度判定手段からの出力信号と上記加
速度判定手段からの出力信号とが共に基準値を越
えるか又は共に越えないことを示すとき四輪駆動
を選択し、それ以外のとき二輪駆動を選択する選
択手段と、同選択手段からの出力信号により二輪
駆動と四輪駆動とを切り換える切換手段とを備え
たことを特徴とする四輪駆動車の自動切換制御装
置である。Means for Solving the Problems The present invention solves the above-mentioned problems, and includes a steering wheel angular velocity sensor that detects the steering wheel angular velocity caused by steering wheel operation, and a reference value in which the output signal from the steering wheel angular velocity sensor is stored in advance. a steering wheel angular velocity determining means for determining whether or not the steering wheel angular velocity is exceeded;
An acceleration sensor that detects acceleration in the longitudinal, lateral, and vertical directions of the vehicle body, and whether at least one of the output signals from the acceleration sensor that indicates the acceleration in the longitudinal, lateral, and vertical directions exceeds a pre-stored reference value. selecting four-wheel drive when the output signal from the steering wheel angular velocity determining means and the output signal from the acceleration determining means both exceed or do not exceed a reference value; An automatic switching control device for a four-wheel drive vehicle, comprising a selection means for selecting two-wheel drive at other times, and a switching means for switching between two-wheel drive and four-wheel drive based on an output signal from the selection means. It is.
作 用
前述の手段によれば、ハンドル角速度及び車体
加速度を検出するセンサを設け、これらセンサに
より検出された値の予め記憶された基準値に対す
る大小を判定することによつて、二輪駆動または
四輪駆動から最適な駆動方式を選択して自動的に
切換えることができる。Effect According to the above-mentioned means, a sensor is provided to detect the steering wheel angular velocity and the vehicle body acceleration, and two-wheel drive or four-wheel drive is achieved by determining the magnitude of the values detected by these sensors with respect to a pre-stored reference value. The most suitable drive method can be selected and automatically switched.
実施例
本考案による四輪駆動車の自動切換制御装置の
一実施例を図示により説明すると、運転者のハン
ドル操作により生ずる角速度をハンドル角速度セ
ンサ１で検出し、操作方向識別手段２を介して方
向性を識別されたパルス信号が演算手段３へ入力
される。ここで演算処理された角速度信号は、ハ
ンドル角速度判定手段４へ送られ、予め記憶され
た基準値と比較してこれを越えるか否かを判定さ
れる。一方、これと並行して車体における前後、
左右、上下方向の加速度（Ｇ）が加速度センサ
（Ｇセンサ）５によて検出され、電圧信号として
演算手段６に入力される。ここで演算処理された
加速度信号は、加速度判定手段（Ｇ判定手段）７
へ送られ、前後方向、左右方向及び上下方向の加
速度の少なくとも１つが予め記憶された基準値と
比較してこれを越えたか否かを判定される。そし
て、上述したハンドル角速度判定手段４での判定
結果の信号と、加速度判定手段７での判定結果の
信号とは、共に選択手段８に入力される。この選
択手段８では、ハンドル角速度の判定結果及び加
速度の判定結果が共に基準値を越えていた場合、
または、両判定結果が共に基準値を越えていない
場合に四輪駆動による走行を選択し、それ以外の
時は二輪駆動による走行を選択して、切換手段９
へその信号を出力する。これを受けた切換手段９
では、信号に応じてソレノイドが所定の方向へ励
磁され、二輪駆動と四輪駆動の切換えを行なうア
クチユエータ１０が作動して四輪駆動切換えクラ
ツチ１１を切換える。これにより、四輪駆動の時
には、後輪１２へエンジン１３からの駆動トルク
がプロペラシヤフト１４を介して伝達されるが、
二輪駆動の時には、駆動トルクの伝達系が四輪駆
動切換えクラツチ１１で分断されてしまつて後輪
１２は従動輪となる。なお、１５はフロントデイ
フアレンシヤル、１６はリヤデイフアレンシヤル
を各々示しており、また、本実施例ででは、操作
方向識別手段２、演算手段３、ハンドル角速度判
定手段４、演算手段６、加速度判定手段７及び選
択手段８がコントローラＣに一体に組込まれてい
る。Embodiment An embodiment of the automatic switching control device for a four-wheel drive vehicle according to the present invention will be described with reference to the drawing.The angular velocity generated by the driver's steering wheel operation is detected by the steering wheel angular velocity sensor 1, and the angular velocity generated by the driver's steering wheel operation is detected by the steering wheel angular velocity sensor 1. The pulse signal whose gender has been identified is input to the calculation means 3. The angular velocity signal processed here is sent to the handle angular velocity determining means 4, and compared with a pre-stored reference value to determine whether it exceeds this. On the other hand, in parallel with this, the front and rear of the car body,
Acceleration (G) in the left and right and up and down directions is detected by an acceleration sensor (G sensor) 5 and inputted to the calculation means 6 as a voltage signal. The acceleration signal processed here is the acceleration determination means (G determination means) 7
, and it is determined whether at least one of the accelerations in the longitudinal direction, the lateral direction, and the vertical direction exceeds a reference value stored in advance. The signal of the determination result from the above-mentioned steering wheel angular velocity determination means 4 and the signal of the determination result from the acceleration determination means 7 are both input to the selection means 8. In this selection means 8, if both the determination result of the steering wheel angular velocity and the determination result of acceleration exceed the reference value,
Alternatively, if both determination results do not exceed the reference value, four-wheel drive driving is selected, otherwise two-wheel drive driving is selected, and the switching means 9
Outputs navel signal. The switching means 9 that received this
Then, the solenoid is energized in a predetermined direction in response to a signal, and the actuator 10 for switching between two-wheel drive and four-wheel drive operates to switch the four-wheel drive switching clutch 11. As a result, during four-wheel drive, drive torque from the engine 13 is transmitted to the rear wheels 12 via the propeller shaft 14.
In the case of two-wheel drive, the drive torque transmission system is separated by the four-wheel drive switching clutch 11, and the rear wheels 12 become driven wheels. Note that 15 indicates a front differential, and 16 indicates a rear differential, and in this embodiment, operation direction identification means 2, calculation means 3, steering wheel angular velocity determination means 4, calculation means 6 , acceleration determining means 7 and selecting means 8 are integrated into the controller C.
次に、第３図のフローチヤートに基づいて説明
すると、ハンドル角速度θと、車体加速度Ｇを前
後方向加速度G1、左右方向加速度G2及び上下方
向加速度G3として各方向で検出する。そして、
ハンドル角速度θが基準値（たとえば200deg／
sec）を越える場合で、かつ、車体加速度Ｇが前
後方向加速度G1の基準値（たとえば0.3G）、左右
方向加速度G2及び上下方向加速度G3の基準値
（たとえば0.5G）のいずれかひとつを越える場合
には、必ず四輪駆動状態に自動的に切換えられ
る。あるいは、ハンドル角速度θ及び車体加速度
Ｇが共に基準値以下の場合も同様に、必ず四輪駆
動状態に切換えられる。しかしながら、それ以外
の場合、すなわち、ハンドル角速度θのみが基準
値を越える場合や、車体加速度のみが基準値を越
える場合には、二輪駆動の走行状態を選択して自
動的に切換えられる。なお、このことは第１図の
選択手段８で表に簡単にまとめられており、ハン
ドル角速度が基準値より大きい場合をθ大、基準
値以下の場合をθ小とし、車体加速度が基準値よ
り大きい場合をＧ大、基準値以下の場合をＧ小と
して、これらの組合せ形態が、θとＧとが共に大
である場合と共に小である場合には四輪駆動に、
また、θとＧが大小互いに相違する場合には二輪
駆動とするものである。 Next, to explain based on the flowchart of FIG. 3, the steering wheel angular velocity θ and the vehicle body acceleration G are detected in each direction as a longitudinal acceleration G 1 , a lateral acceleration G 2 , and a vertical acceleration G 3 . and,
The handle angular velocity θ is the standard value (for example, 200deg/
sec), and the vehicle body acceleration G is one of the standard values for longitudinal acceleration G1 (e.g. 0.3G), lateral acceleration G2 and vertical acceleration G3 (e.g. 0.5G). If the vehicle exceeds this limit, it will automatically switch to four-wheel drive. Alternatively, even if both the steering wheel angular velocity θ and the vehicle body acceleration G are below the reference value, the four-wheel drive state is always switched. However, in other cases, that is, when only the steering wheel angular velocity θ exceeds the reference value, or when only the vehicle body acceleration exceeds the reference value, the two-wheel drive driving state is selected and automatically switched. This is simply summarized in the table in selection means 8 in Figure 1, where θ is large when the steering wheel angular velocity is greater than the reference value, θ is small when it is less than the reference value, and when the vehicle body acceleration is less than the reference value. When it is large, G is large, and when it is below the reference value, G is small. If the combination of these is both large and small, the four-wheel drive is applied.
Furthermore, when θ and G are different in magnitude, two-wheel drive is assumed.
考案の効果
以上の結果、運転者の判断を待つことなく走行
中のハンドル角速度及び車体加速度の信号が大小
によつて、二輪駆動と四輪駆動とから走行状態に
適した方を選択して自動的に切換えられるため、
運転操作の煩わしさが解消され、しかも、二輪駆
動走行による燃費の向上や四輪駆動走行による走
行安定性の確保を容易に活用することができるよ
うになる。Effects of the invention As a result of the above, the system automatically selects between two-wheel drive and four-wheel drive depending on the magnitude of the steering wheel angular velocity and vehicle body acceleration signals while driving, without waiting for the driver's judgment. Because it can be switched according to
The hassle of driving operations is eliminated, and moreover, it becomes possible to easily take advantage of the improved fuel efficiency achieved by two-wheel drive and the guaranteed running stability achieved by four-wheel drive.
第１図は、本考案のハンドル角速度とＧ加速度
により制御するコントローラの機能を実現する構
成ブロツク図であり、第２図はコントローラによ
る四輪駆動と二輪駆動とに切換えを行う四輪駆動
車の全体配置図であり、第３図はコントローラの
ソフトウエアを示すフローチヤートである。
１……ハンドル角速度センサ、４……ハンドル
角速度判定手段、５……加速度（Ｇ）センサ、７
……加速度（Ｇ）判定手段、８……選択手段、９
……ソレノイド、１０……アクチユエータ、１１
……4WD切換クラツチ、１４……プロペラシヤ
フト。
Fig. 1 is a block diagram of a four-wheel drive vehicle that realizes the functions of the controller that controls the steering wheel angular velocity and G acceleration of the present invention, and Fig. 2 shows a four-wheel drive vehicle in which the controller switches between four-wheel drive and two-wheel drive. This is an overall layout diagram, and FIG. 3 is a flowchart showing the software of the controller. 1... Handle angular velocity sensor, 4... Handle angular velocity determination means, 5... Acceleration (G) sensor, 7
...Acceleration (G) determination means, 8...Selection means, 9
... Solenoid, 10 ... Actuator, 11
...4WD switching clutch, 14...propeller shaft.
Claims (1)
出するハンドル角速度センサと、同ハンドル角速
度センサからの出力信号が予め記憶された基準値
を越えるか否かを判定するハンドル角速度判定手
段と、車体における前後、左右、上下方向の加速
度を検出する加速度センサと、同加速度センサか
らの出力信号のうち上記前後、左右、上下方向の
加速度を示す少なくとも１つが予め記憶された基
準値を越えたか否かを判定する加速度判定手段
と、上記ハンドル角速度判定手段からの出力信号
と上記加速度判定手段からの出力信号とが共に基
準値を越えるか又は共に越えないことを示すとき
四輪駆動を選択し、それ以外のとき二輪駆動を選
択する選択手段と、同選択手段からの出力信号に
より二輪駆動と四輪駆動とを切り換える切換手段
とを備えたことを特徴とする四輪駆動車の自動切
換制御装置。 A steering wheel angular velocity sensor that detects the steering wheel angular velocity generated by steering wheel operation; a steering wheel angular velocity determination means that determines whether the output signal from the steering wheel angular velocity sensor exceeds a pre-stored reference value; an acceleration sensor that detects acceleration in a direction; and an acceleration determination means that determines whether at least one of the output signals from the acceleration sensor indicating acceleration in the longitudinal, lateral, and vertical directions exceeds a pre-stored reference value. When the output signal from the steering wheel angular velocity determining means and the output signal from the acceleration determining means both exceed or do not exceed the reference value, four-wheel drive is selected; otherwise, two-wheel drive is selected. An automatic switching control device for a four-wheel drive vehicle, comprising a selection means for making a selection, and a switching means for switching between two-wheel drive and four-wheel drive based on an output signal from the selection means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984125904U JPS6141031U (en) | 1984-08-21 | 1984-08-21 | Automatic switching control device for four-wheel drive vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984125904U JPS6141031U (en) | 1984-08-21 | 1984-08-21 | Automatic switching control device for four-wheel drive vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6141031U JPS6141031U (en) | 1986-03-15 |
| JPH035462Y2 true JPH035462Y2 (en) | 1991-02-13 |
Family
ID=30684592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984125904U Granted JPS6141031U (en) | 1984-08-21 | 1984-08-21 | Automatic switching control device for four-wheel drive vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6141031U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6133325A (en) * | 1984-07-25 | 1986-02-17 | Fuji Heavy Ind Ltd | Automatic shifting device for 4-wheel-drive vehicle |
-
1984
- 1984-08-21 JP JP1984125904U patent/JPS6141031U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6133325A (en) * | 1984-07-25 | 1986-02-17 | Fuji Heavy Ind Ltd | Automatic shifting device for 4-wheel-drive vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6141031U (en) | 1986-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3681786B2 (en) | Front and rear wheel drive vehicle | |
| JPH08300965A (en) | Front and rear wheel drive vehicle | |
| JPH092090A (en) | Front and rear wheel driving vehicle | |
| EP1359044B1 (en) | A four-wheel drive vehicle | |
| JPH01154021U (en) | ||
| JP2004338685A (en) | LOW mu ROAD JUDGING APPARATUS AND DRIVING FORCE DISTRIBUTION CONTROL APPARATUS OF FOUR-WHEEL-DRIVE VEHICLE | |
| JPH035462Y2 (en) | ||
| KR100291087B1 (en) | Device and method for controlling automatic conversion travelling mode of part time 4 wheel driving vehicle | |
| JPH039472Y2 (en) | ||
| JPS62166114A (en) | Driving power control device for four-wheel driven car | |
| CN111824241B (en) | Auxiliary steering control method and device and vehicle | |
| JPH035463Y2 (en) | ||
| US7290636B2 (en) | Device and method for controlling distribution of drive force of four-wheel drive car | |
| JP2795445B2 (en) | Electric vehicle | |
| JPH0899647A (en) | Steering assisting device for vehicle | |
| JPH0437792Y2 (en) | ||
| JP2639023B2 (en) | Part-time four-wheel drive vehicle | |
| JPH035461Y2 (en) | ||
| JPH0311063Y2 (en) | ||
| JPH04368232A (en) | Two wheel/four wheel switching control device for vehicle | |
| JP3506223B2 (en) | Driving force distribution control device for four-wheel drive vehicle | |
| JPS6141037U (en) | four wheel drive vehicle | |
| JPH059292B2 (en) | ||
| JPS6371434A (en) | Constant-speed traveling device | |
| JPS62108133U (en) |