JPH0311063Y2 - - Google Patents
Info
- Publication number
- JPH0311063Y2 JPH0311063Y2 JP1984125903U JP12590384U JPH0311063Y2 JP H0311063 Y2 JPH0311063 Y2 JP H0311063Y2 JP 1984125903 U JP1984125903 U JP 1984125903U JP 12590384 U JP12590384 U JP 12590384U JP H0311063 Y2 JPH0311063 Y2 JP H0311063Y2
- Authority
- JP
- Japan
- Prior art keywords
- wheel drive
- signal
- acceleration
- reference value
- 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.)
- Expired
Links
- 230000001133 acceleration Effects 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、二輪駆動と四輪駆動との切換えが可
能な四輪駆動車において、ラフロードの走行や急
旋回のとき、運転者の判断によるのではなく、Ｇ
センサを用いて車体の加速度を検出することによ
り、自動的に四輪駆動に切換えて走行の安定性を
得られるようにした四輪駆動車に関するものであ
る。[Detailed description of the invention] Industrial application field This invention is a four-wheel drive vehicle that can switch between two-wheel drive and four-wheel drive, and is designed to prevent the driver from using the driver's judgment when driving on rough roads or making sharp turns. Without, G
The present invention relates to a four-wheel drive vehicle that automatically switches to four-wheel drive by detecting the acceleration of the vehicle body using a sensor, thereby achieving stable driving.
従来の技術
自動車の走行に当つて、ラフロードを走行した
り急旋回をしたりすると車体が前後方向、左右方
向及び上下方向に変動して走行不安定になること
が知られている。一方、四輪駆動にすると、全て
の車輪が駆動輪となつて路面に密着するので、走
行安定性の向上に有効なことも知られている。そ
こで、雪路、凍結路などの低摩擦路、あるいは砂
地、急坂路、ぬかるみなどラフロードの走行抵抗
の大きいところでは、運転者の判断によつて手動
で四輪駆動に切換えることができ、これによつて
上述したような状況に対処することのできる四輪
駆動車は従来よりあつた。BACKGROUND OF THE INVENTION It is known that when an automobile is driven on a rough road or when it makes a sharp turn, the vehicle body fluctuates in the front-back, left-right, and up-down directions, making the vehicle unstable. On the other hand, it is also known that four-wheel drive is effective in improving driving stability because all wheels act as driving wheels and come into close contact with the road surface. Therefore, on low-friction roads such as snowy roads, frozen roads, or rough roads such as sandy roads, steep slopes, and muddy roads, where there is high driving resistance, the driver can manually switch to four-wheel drive at his/her discretion. Therefore, there have been four-wheel drive vehicles that can cope with the above-mentioned situations.
考案が解決しようとする課題
しかし、走行時に運転者が判断して四輪駆動に
切換える四輪駆動車では、判断及び切換操作にタ
イムラグや個人差があり、まして急旋回時に手動
で四輪駆動にすることは困難なことであつた。Problems that the invention aims to solve However, in four-wheel drive vehicles, where the driver makes a decision to switch to four-wheel drive while driving, there are time lags and individual differences in the decision and switching operation, and it is even more difficult to manually switch to four-wheel drive when making sharp turns. It was a difficult thing to do.
そこで、本考案の目的は、運転者の判断によら
ず、自動的に二輪駆動から四輪駆動に切換えるこ
とができるようにした四輪駆動車を得ることにあ
る。 Therefore, an object of the present invention is to provide a four-wheel drive vehicle that can automatically switch from two-wheel drive to four-wheel drive without depending on the driver's judgment.
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、二輪駆
動状態と四輪駆動状態とを切り換える駆動切換手
段と、同駆動切換手段を作動させる信号を発する
制御手段とを備えた四輪駆動車において、前後方
向、左右方向及び上下方向の車体加速度を検出す
るＧセンサと、同Ｇセンサで検出されたいずれか
の方向の加速度が基準値以上であるときに信号を
発するＧ判定手段と、同Ｇ判定手段からの前記基
準値以上を示す信号が所定時間以上継続したこと
を検出して信号を発する継続時間検出手段と、前
記Ｇ判定手段から前記基準値以上を示す信号が設
定時間内に所定回数以上発生されたことを検出し
て信号を発するカウンタ手段とを設け、前記継続
時間検出手段またはカウンタ手段からの信号を受
けて前記制御手段が前記駆動切換手段を四輪駆動
状態とするように構成したことを特徴とする四輪
駆動車である。Means for Solving the Problems The present invention solves the above-mentioned problems, and includes a drive switching means for switching between a two-wheel drive state and a four-wheel drive state, and a control means for issuing a signal to operate the drive switching means. In four-wheel drive vehicles, there is a G-sensor that detects vehicle body acceleration in the longitudinal, lateral, and vertical directions, and a G-sensor that issues a signal when the acceleration in any direction detected by the G-sensor exceeds a reference value. a determination means; a duration detection means for detecting that the signal indicating the reference value or more from the G determination means has continued for a predetermined time or more and emitting a signal; a counter means for detecting that the occurrence of the occurrence of a predetermined number of times or more within a set time and emitting a signal; and upon receiving the signal from the continuation time detecting means or the counter means, the control means switches the drive switching means to four-wheel drive. This is a four-wheel drive vehicle characterized by being configured such that the
作用
前述の手段によれば、Ｇセンサを用いて車体の
加速度を検出し、基準値以上の加速度が所定時間
以上継続するか、あるいは基準値以上の加速度が
設定時間内に所定回数以上発生するかを検出する
ことにより、車両の運転状態、特に、ラフロード
走行、急旋回運転及び坂路走行等の四輪駆動を必
要とする運転状態の検知が可能となるので、これ
を受けて二輪駆動から四輪駆動への的確な切換え
を自動的に実施できるようになる。Effect: According to the above-mentioned means, the acceleration of the vehicle body is detected using a G sensor, and it is determined whether acceleration equal to or higher than a reference value continues for a predetermined time or more, or whether acceleration equal to or higher than a reference value occurs for a predetermined number of times or more within a set time. By detecting the Accurate switching to drive can now be performed automatically.
実施例
本考案による四輪駆動車の一実施例を第１図な
いし第４図に基づいて説明すると、第１図の如
く、Ｇセンサ１により前後方向、左右方向及び上
下方向のいずれからもの車体加速度を電圧として
検出し、その検出された電気信号を演算手段２に
より演算し、前後方向、左右方向及び上下方向の
いずれかが予め記憶された基準値以上の加速度を
示していないかＧ判定手段３により判定する。そ
して、基準値以上の加速度検出状況がタイマ４に
より一定時間継続したことを継続時間検出手段５
により検出した場合には、その信号をコントロー
ラＣに入力する。また、基準値以上の加速度が一
定時間継続しなくても、基準値以上の加速度が設
定時間内に検出された回数をカウンタ６で計数
し、その回数が所定値以上となつた場合にもその
信号をコントローラＣに入力する。これらの信号
を受けたコントローラＣは、4WD切換ソレノイ
ド７を励磁させ、二輪駆動状態から四輪駆動状態
へ自動的に切換えるように制御する。Embodiment An embodiment of a four-wheel drive vehicle according to the present invention will be explained based on FIGS. 1 to 4. As shown in FIG. G determining means which detects the acceleration as a voltage, calculates the detected electrical signal by the calculating means 2, and determines whether any of the longitudinal direction, the horizontal direction, and the vertical direction shows an acceleration equal to or higher than a pre-stored reference value. Judgment is based on 3. Then, the timer 4 detects that the acceleration detection state exceeding the reference value has continued for a certain period of time by the duration detection means 5.
If detected, the signal is input to controller C. In addition, even if the acceleration above the reference value does not continue for a certain period of time, the counter 6 counts the number of times the acceleration above the reference value is detected within the set time, and when the number of times exceeds the predetermined value, Input the signal to controller C. Upon receiving these signals, the controller C excites the 4WD switching solenoid 7 and controls the vehicle to automatically switch from the two-wheel drive state to the four-wheel drive state.
従つて、本考案は、第２図、第３図に示す如
く、Ｇセンサ１により検出された前後方向、左右
方向及び上下方向のいずれかが基準値以上となつ
た場合に四輪駆動へ切換えるか否かを判定して制
御する前記コントローラＣから発信された信号に
よつてソレノイド７が励磁され、アクチユエータ
８を駆動し、四輪駆動切換クラツチ９を自動的に
作動させて、エンジン１０よりの駆動トルクをプ
ロペラシヤフト１１を介して後輪１２に伝達する
ように構成された四輪駆動車である。 Therefore, as shown in FIGS. 2 and 3, the present invention switches to four-wheel drive when any of the longitudinal, lateral, and vertical directions detected by the G sensor 1 exceeds a reference value. The solenoid 7 is energized by the signal sent from the controller C, which determines whether or not the This is a four-wheel drive vehicle configured to transmit drive torque to rear wheels 12 via a propeller shaft 11.
なお、１２はリヤデイフアレンシヤル、１３は
フロントデイフアレンシヤル、１４は変向機であ
る。 Note that 12 is a rear differential, 13 is a front differential, and 14 is a direction changer.
そこで、以下第４図のフローチヤートに基いて
その制御例を詳細に説明すると、Ｇセンサ１で車
体の前後方向G1、左右方向G2及び上下方向G3の
加速度を検出し、その値がたとえばG1≧0.3G、
またはG2≧0.5G、またはG3≧0.5Gであつて、少
なくともそのいずれかが36ms以上継続したとき、
あるいは、これだけの時間継続しなくても２秒間
に２回以上前記の基準値の加速度が発生したとき
には、車両の運転状態がラフロード走行、急旋回
運転または坂道走行等の四輪駆動を必要とする運
転状況にあると判断し、その信号を発信してソレ
ノイド７を励磁させ、自動的に四輪駆動に切換え
る。しかし、Ｇセンサ１によつて検出された加速
度が、G1≧0.3G、G2≧0.5G、またはG3≧0.5Gの
いずれにも達しない場合、または、達しても
36ms以内しか継続せず、しかも２秒間に２回以
上発生しなかつた場合には、四輪駆動を必要とす
る運転状況にあるとは判断されず、従つて、ソレ
ノイド７は励磁されずに二輪駆動状態が保持され
る。 Therefore , an example of the control will be explained in detail below based on the flowchart of FIG . For example, G 1 ≧0.3G,
or G 2 ≧0.5G, or G 3 ≧0.5G, and at least one of them continues for 36ms or more,
Alternatively, if the acceleration of the above reference value occurs twice or more in two seconds even if it does not continue for this long, the driving condition of the vehicle is rough road driving, sharp turning driving, slope driving, etc., which requires four-wheel drive. It determines that the vehicle is in a driving state, sends a signal to energize the solenoid 7, and automatically switches to four-wheel drive. However, if the acceleration detected by the G sensor 1 does not reach any of G 1 ≧0.3G, G 2 ≧0.5G, or G 3 ≧0.5G, or even if it reaches
If it lasts for less than 36ms and does not occur more than once in 2 seconds, it is not determined that the driving situation requires four-wheel drive, and therefore, solenoid 7 is not energized and the two-wheel drive is activated. The driving state is maintained.
考案の効果
前述した本考案の四輪駆動車によれば、ラフロ
ード走行時や急旋回時等のように四輪駆動車が必
要な車両の走行状況をＧセンサの検出値から判断
し、自動的に二輪駆動から四輪駆動へと切換える
ことができるので、運転者は切換操作の煩わしさ
から解放される。しかも、個人差の大きい運転者
の判断による手動切換えとは異なり、運転者に関
係なく的確な切換制御が達成されるので、四輪駆
動車のもつ走行安定性を容易にかつ確実に得るこ
とができるようになる。Effects of the invention According to the above-mentioned four-wheel drive vehicle of the present invention, the driving situation of the vehicle that requires four-wheel drive, such as when driving on a rough road or when making a sharp turn, is determined from the detected value of the G sensor, and automatically Since it is possible to switch from two-wheel drive to four-wheel drive at any time, the driver is freed from the hassle of switching operations. Moreover, unlike manual switching, which is based on the driver's judgment, which has large individual differences, accurate switching control is achieved regardless of the driver, making it possible to easily and reliably obtain the running stability of a four-wheel drive vehicle. become able to.
第１図は、本考案のＧセンサによる制御される
コントローラの機能を実現する構成ブロツク図、
第２図はコントローラにより四輪駆動に切換えを
行う四輪駆動車の全体図、第３図はコントローラ
のハードウエア関連図、第４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……Ｇセンサ、３……Ｇ判定手段、４……タ
イマ、５……継続時間検出手段、６……カウン
タ、７……ソレノイド、８……アクチユエータ、
９……4WD切換クラツチ。
FIG. 1 is a configuration block diagram that realizes the functions of a controller controlled by the G sensor of the present invention.
FIG. 2 is an overall view of a four-wheel drive vehicle that switches to four-wheel drive using a controller, FIG. 3 is a diagram related to the hardware of the controller, and FIG. 4 is a flowchart showing the software of the controller. 1... G sensor, 3... G determining means, 4... Timer, 5... Continuation time detection means, 6... Counter, 7... Solenoid, 8... Actuator,
9...4WD switching clutch.
Claims (1)
動切換手段と、同駆動切換手段を作動させる信号
を発する制御手段とを備えた四輪駆動車におい
て、前後方向、左右方向及び上下方向の車体加速
度を検出するＧセンサと、同Ｇセンサで検出され
たいずれかの方向の加速度が基準値以上であると
きに信号を発するＧ判定手段と、同Ｇ判定手段か
らの前記基準値以上を示す信号が所定時間以上継
続したことを検出して信号を発する継続時間検出
手段と、前記Ｇ判定手段から前記基準値以上を示
す信号が設定時間内に所定回数以上発生されたこ
とを検出して信号を発するカウンタ手段とを設
け、前記継続時間検出手段またはカウンタ手段か
らの信号を受けて前記制御手段が前記駆動切換手
段を四輪駆動状態とするように構成したことを特
徴とする四輪駆動車。 In a four-wheel drive vehicle equipped with a drive switching means for switching between a two-wheel drive state and a four-wheel drive state, and a control means for emitting a signal to activate the drive switching means, vehicle body acceleration in the longitudinal direction, left-right direction, and vertical direction is controlled. A G sensor for detecting, a G determination means for emitting a signal when acceleration in any direction detected by the G sensor is equal to or greater than a reference value, and a signal from the G determination means indicating that the acceleration is equal to or greater than the reference value is a predetermined value. a duration detection means that detects that the signal has continued for a period of time or more and generates a signal; and a counter that detects that a signal indicating the reference value or more is generated from the G determination means a predetermined number of times or more within a set time and generates a signal. A four-wheel drive vehicle, characterized in that the control means sets the drive switching means to a four-wheel drive state in response to a signal from the duration detection means or the counter means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984125903U JPS6141030U (en) | 1984-08-21 | 1984-08-21 | four wheel drive vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984125903U JPS6141030U (en) | 1984-08-21 | 1984-08-21 | four wheel drive vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6141030U JPS6141030U (en) | 1986-03-15 |
| JPH0311063Y2 true JPH0311063Y2 (en) | 1991-03-18 |
Family
ID=30684591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984125903U Granted JPS6141030U (en) | 1984-08-21 | 1984-08-21 | four wheel drive vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6141030U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0789123B2 (en) * | 1987-05-08 | 1995-09-27 | 本田技研工業株式会社 | Sensor system for safety devices |
-
1984
- 1984-08-21 JP JP1984125903U patent/JPS6141030U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6141030U (en) | 1986-03-15 |
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