JPH04314638A - Device for preventing collision from behind - Google Patents

Device for preventing collision from behind

Info

Publication number
JPH04314638A
JPH04314638A JP3108752A JP10875291A JPH04314638A JP H04314638 A JPH04314638 A JP H04314638A JP 3108752 A JP3108752 A JP 3108752A JP 10875291 A JP10875291 A JP 10875291A JP H04314638 A JPH04314638 A JP H04314638A
Authority
JP
Japan
Prior art keywords
vehicle
inter
distance
deceleration
speed
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.)
Granted
Application number
JP3108752A
Other languages
Japanese (ja)
Other versions
JP2979707B2 (en
Inventor
Hiroshi Watanabe
博司 渡辺
Hiroyuki Uejima
上島 宏幸
Kunihiko Kurami
倉見 邦彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP3108752A priority Critical patent/JP2979707B2/en
Publication of JPH04314638A publication Critical patent/JPH04314638A/en
Application granted granted Critical
Publication of JP2979707B2 publication Critical patent/JP2979707B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Traffic Control Systems (AREA)

Abstract

PURPOSE:To provide a device for preventing collision from behind whereby a speed of a vehicle can be smoothly adjusted without performing rapid deceleration more than necessary even at the time of being suddenly wedged by the other vehicle. CONSTITUTION:In a device for preventing collision from behind provided with an inter-vehicle distance detecting means (a) for detecting a distance from a vehicle ahead, deceleration means (b) for decelerating a car speed and a control means (c) for controlling the deceleration means (b) so as to obtain the inter- vehicle distance of predetermined adequate value, a relative speed calculating means (d) for calculating a relative speed between a vehicle and the vehicle ahead and a wedging detecting means (e) for detecting the front of the vehicle wedged by the vehicle ahead are provided. Further, the control means (c) is constituted such that a level of deceleration is changed based on the relative speed when the vehicle is detected wedged by the vehicle ahead.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】本発明は、車両(自車両)の前方
に存在する先行車両との車間距離を検出して車両の速度
を減速し、追突を未然に防止する追突防止装置に関する
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear-end collision prevention device that detects the distance between a vehicle (its own vehicle) and a preceding vehicle and reduces the speed of the vehicle to prevent a rear-end collision.

【0002】0002

【従来の技術】従来この種の装置としては、例えば特開
昭59−231157号公報に示されるようなものがあ
る。これは、車両の走行速度および先行車両との車間距
離を検出し、車速に対する車間距離が、そのままの走行
状態では先行車両との間に所定の車間距離を保てない範
囲にあると判別された場合にはスロットル弁を閉成駆動
し、さらにスロットル弁の閉成だけでは上記所定の車間
距離を保てない場合にはブレーキを作動させるようにし
たものである。
2. Description of the Related Art Conventionally, there is a device of this type as disclosed in, for example, Japanese Patent Laid-Open No. 59-231157. This detects the speed of the vehicle and the distance between the vehicle in front and the vehicle in front, and determines that the distance between the vehicle and the vehicle in front is within a range where the specified distance between the vehicle and the vehicle in front cannot be maintained under the current driving conditions. In this case, the throttle valve is driven to close, and if the predetermined inter-vehicle distance cannot be maintained only by closing the throttle valve, the brake is operated.

【0003】0003

【発明が解決しようとする課題】しかしながら、上述し
たような従来の追突防止装置は、車間距離および車両の
走行速度のみによって速度制御を行う構成であったので
、車両の直前に割込みがあった場合には、割込み車両と
の相対速度の大小にかかわらず、その急激な車間距離の
変化に反応して直ちにブレーキがかかり、急減速される
という問題点があった。すなわち、通常の運転において
は、車両の前方に割込みがあると、この割込み車両に対
する自己の車両の相対速度を判断し、この相対速度が大
きければブレーキ操作等により急減速することが行われ
るが、相対速度がさほど大きくなければスロットルの閉
成等により徐々に減速するようにしている。従って、単
に車間距離が急激に変化したのみでブレーキが作動する
ような制御は通常の運転制御と異なるものであり、運転
者に違和感を与える、という問題点があった。
[Problem to be Solved by the Invention] However, the conventional rear-end collision prevention device as described above has a configuration in which speed control is performed only based on the following distance and the traveling speed of the vehicle, so that if there is an interruption immediately in front of the vehicle, The problem with this is that the brakes are immediately applied in response to a sudden change in the distance between vehicles, regardless of the relative speed to the cutting vehicle, resulting in sudden deceleration. That is, in normal driving, when there is an interruption in front of the vehicle, the relative speed of the own vehicle with respect to the interruption vehicle is determined, and if this relative speed is large, the driver suddenly decelerates by operating the brakes, etc. If the relative speed is not very large, the speed is gradually reduced by closing the throttle or the like. Therefore, control in which the brakes are activated simply due to a sudden change in the inter-vehicle distance is different from normal driving control, and there is a problem in that it gives the driver a sense of discomfort.

【0004】本発明の目的は、他の先行車両の急な割込
み時にも必要以上の急減速を行うことなく、車両の減速
を円滑に行いうる追突防止装置を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a rear-end collision prevention device that can smoothly decelerate a vehicle even when another preceding vehicle suddenly cuts in, without decelerating more rapidly than necessary.

【0005】[0005]

【課題を解決するための手段】クレーム対応図である図
1に対応して説明すれば、本発明は、自車両の前方に存
在する先行車両との車間距離を検出する車間距離検出手
段aと、前記自車両の速度を減速させる減速手段bと、
前記車間距離検出手段aにより検出される車間距離が所
定の適正値となるように前記減速手段bを制御する制御
手段cとを備えた追突防止装置に適用される。そして、
上述した目的は、前記自車両と前記先行車両との相対速
度を算出する相対速度算出手段dと、前記自車両の前方
に他の先行車両の割込みがあったことを検出する割込み
検出手段eとを設け、前記制御手段cを、前記割込み検
出手段eにより割込みが検出されると、前記相対速度算
出手段dにより算出された相対速度に基づいて、前記減
速手段による減速の大きさを変更するように構成するこ
とで達成している。
[Means for Solving the Problems] The present invention will be explained with reference to FIG. 1, which is a diagram corresponding to the claims. , deceleration means b for decelerating the speed of the host vehicle;
The present invention is applied to a rear-end collision prevention device comprising a control means c that controls the deceleration means b so that the inter-vehicle distance detected by the inter-vehicle distance detection means a becomes a predetermined appropriate value. and,
The above-mentioned purpose is to provide a relative speed calculation means d for calculating the relative speed between the own vehicle and the preceding vehicle, and an interruption detection means e for detecting that there is an interruption by another preceding vehicle in front of the own vehicle. and the control means c is configured to change the magnitude of deceleration by the deceleration means based on the relative speed calculated by the relative speed calculation means d when an interruption is detected by the interruption detection means e. This is achieved by configuring the

【0006】[0006]

【作用】車両の走行中は、車間距離検出手段aにより自
車両の前方に存在する先行車両との車間距離が検出され
るとともに、相対速度算出手段dにより先行車両に対す
る自車両の相対速度が算出される。そして、割込み検出
手段eが車両の前方に他の先行車両の割込みがあったこ
とを検出すると、制御手段cは、相対速度算出手段dに
より算出された相対速度に基づいて車両速度の減速度を
変更して指令を送出し、減速手段bはこの制御手段の指
令に基づいて車両の速度を減速する。
[Operation] While the vehicle is running, the inter-vehicle distance detection means a detects the inter-vehicle distance to the preceding vehicle located in front of the own vehicle, and the relative speed calculation means d calculates the relative speed of the own vehicle with respect to the preceding vehicle. be done. When the interruption detection means e detects that there is an interruption of another preceding vehicle in front of the vehicle, the control means c determines the deceleration of the vehicle speed based on the relative speed calculated by the relative speed calculation means d. The deceleration means b decelerates the speed of the vehicle based on the command from the control means.

【0007】[0007]

【実施例】図2〜図5により本発明の一実施例を説明す
る。図2は本発明による追突防止装置の一実施例の構成
を示すブロック図である。図において、11は車間距離
検出装置、12は割込み検出装置、13は車両(自車両
)の速度(車速V)を検出する車速センサ、14はコン
ピューターシステムからなる制御装置、15および16
はそれぞれ車速を調節するためのブレーキコントローラ
およびスロットルコントローラである。
[Embodiment] An embodiment of the present invention will be explained with reference to FIGS. 2 to 5. FIG. 2 is a block diagram showing the configuration of an embodiment of the rear-end collision prevention device according to the present invention. In the figure, 11 is an inter-vehicle distance detection device, 12 is an interrupt detection device, 13 is a vehicle speed sensor that detects the speed (vehicle speed V) of the vehicle (own vehicle), 14 is a control device consisting of a computer system, 15 and 16
are a brake controller and a throttle controller for adjusting vehicle speed, respectively.

【0008】車間距離検出装置11は、図3(a)に示
すように、車両1の両端に装備された2機のレーザーレ
ーダ17を備え、このレーザーレーダ17からは車両1
の前方に向ってレーザービーム18が発射されている。 レーザーレーダ17は、周知のようにレーザービーム1
8を距離検出方向に向って発射し、この反射光により測
定対象との間の距離を検出するものである。
As shown in FIG. 3(a), the inter-vehicle distance detection device 11 includes two laser radars 17 installed at both ends of the vehicle 1.
A laser beam 18 is emitted toward the front. As is well known, the laser radar 17 emits a laser beam 1.
8 is emitted in the distance detection direction, and the distance between the object and the object to be measured is detected by the reflected light.

【0009】次に、図4に示すフローチャートおよび図
3、図5を参照して、本実施例の動作について説明する
。ステップS1では、割込み検出装置12により走行す
る車両前方に他の先行車両の割込みが検出され、ステッ
プS2では、この割込み検出装置12の検出結果から他
の先行車両の割込みがあったか否かが判定される。この
結果、割込みがあった場合にはプログラムがステップS
3に移行し、割込みがなければステップS1に戻って割
込み検出動作が継続される。
Next, the operation of this embodiment will be explained with reference to the flowchart shown in FIG. 4 and FIGS. 3 and 5. In step S1, the interruption detection device 12 detects an interruption of another preceding vehicle in front of the traveling vehicle, and in step S2, it is determined from the detection result of this interruption detection device 12 whether or not there is an interruption of another preceding vehicle. Ru. As a result, if there is an interrupt, the program will step S.
If there is no interrupt, the process returns to step S1 to continue the interrupt detection operation.

【0010】割込み検出動作について、図3を参照して
詳細に説明する。図3(a)に示すように、先行する車
両2との車間距離Lを一定に保って走行している状態で
は、2つのレーザーレーダ17からは等しい検出距離が
得られる。この時、同図(b)に示すように、車両1の
前方に他の先行車両3の割込みがあった場合、一方のレ
ーザーレーダ17(図中では右側のレーザーレーダ17
)による検出距離が急激に小さくなる。そこで、割込み
検出装置12は、各レーザレーダによる検出距離の微分
値を監視し、一方の微分値が所定の閾値以上に大きくな
ったら、割込みが発生したものと判断してその方向およ
び先行車両3との車間距離を算出する。
The interrupt detection operation will be explained in detail with reference to FIG. As shown in FIG. 3A, when the vehicle is traveling while keeping the inter-vehicle distance L to the preceding vehicle 2 constant, equal detection distances are obtained from the two laser radars 17. At this time, as shown in the figure (b), if there is an interruption by another preceding vehicle 3 in front of the vehicle 1, one laser radar 17 (the laser radar 17 on the right side in the figure)
), the detection distance decreases rapidly. Therefore, the interruption detection device 12 monitors the differential value of the detection distance by each laser radar, and when one of the differential values becomes larger than a predetermined threshold value, it is determined that an interruption has occurred, and Calculate the distance between the vehicle and the vehicle.

【0011】なお、同図(c)に示すように車両がカー
ブ路に進入した場合は、一方のレーザーレーダ17によ
る検出距離が徐々に短くなり、その微分値も大きく変動
することがないため、カーブ路と認識できる。また先行
する他車両2が突然車線変更して車両1前方から退去し
た場合も、一方のレーザーレーダ17による検出距離が
長くなった後に他方のレーザーレーダ17による検出距
離が長くなることから判別できる。
Note that when the vehicle enters a curved road as shown in FIG. 2(c), the detection distance by one of the laser radars 17 gradually becomes shorter, and its differential value does not change significantly. It can be recognized as a curved road. Further, even if the other vehicle 2 in front suddenly changes lanes and leaves in front of the vehicle 1, it can be determined because the detection distance by one laser radar 17 becomes longer and then the detection distance by the other laser radar 17 becomes longer.

【0012】ステップS3では、前方に割込んできた先
行車両との車間距離Lが車間距離検出装置11のレーザ
ーレーダ17により測定されるとともに、この先行車両
との相対速度Vrが制御装置14により算出される。こ
の際、相対速度Vrは、レーザーレーダ17による検出
距離の経時変化と車速センサ13により測定された車速
Vとを用いて求められる。
In step S3, the inter-vehicle distance L to the preceding vehicle that has cut in ahead is measured by the laser radar 17 of the inter-vehicle distance detection device 11, and the relative speed Vr with respect to this preceding vehicle is calculated by the control device 14. be done. At this time, the relative speed Vr is determined using the change over time in the distance detected by the laser radar 17 and the vehicle speed V measured by the vehicle speed sensor 13.

【0013】ステップS4では、ステップS3において
算出された相対速度Vrが正、負または0のいずれの値
をとるかが判定される。その結果、相対速度Vrが正で
あればプログラムがステップS5に移行し、相対速度V
rが0であればステップS7に移行し、相対速度Vrが
負であればステップS1に戻って再度割込み検出動作が
行われる。
In step S4, it is determined whether the relative velocity Vr calculated in step S3 takes a positive, negative, or zero value. As a result, if the relative velocity Vr is positive, the program moves to step S5, and the relative velocity Vr
If r is 0, the process moves to step S7, and if the relative velocity Vr is negative, the process returns to step S1 and the interrupt detection operation is performed again.

【0014】相対速度Vrが正の値をとるということは
、車両の車速V>先行車両の車速とうことである。従っ
て、先行車両との車間が急激に狭まることが予測される
ので、ステップS5では、ブレーキコントローラ15お
よびスロットルコントローラ16を制御して、次式で表
わされる相対速度Vrに応じた減速度gによって比較的
急激に減速する。 g≧(Vr×Vr)/(2×L)        ……
(1)ここで(1)式は、車両が先行車両に絶対に追突
しないための減速度を表わしている。この(1)式の根
拠について、図5を参照して説明する。
When the relative speed Vr takes a positive value, it means that the vehicle speed V>the vehicle speed of the preceding vehicle. Therefore, it is predicted that the distance between the vehicle and the preceding vehicle will rapidly narrow, so in step S5, the brake controller 15 and the throttle controller 16 are controlled to compare the deceleration g according to the relative speed Vr expressed by the following equation. suddenly decelerates. g≧(Vr×Vr)/(2×L)...
(1) Here, equation (1) represents the deceleration to ensure that the vehicle never collides with the preceding vehicle. The basis of this equation (1) will be explained with reference to FIG. 5.

【0015】図5(a)に示すように、車両1が先行車
両2に対して車間距離Lvを保って走行している場合を
考える。この時、同図(b)に示すように、車間距離L
の位置に他の先行車両3による割込みが生じたとすると
、車両1が初速度(先行車両3に対する相対速度)Vr
の状態から減速度gで減速しながらt0秒後に車間距離
Lだけ進んで停止(相対速度0)するためには、次の2
式の条件を満足しなければならない。 Vr・t0−(g・t02)/2=L    ……(走
行距離) Vr−g・t0≦0    ……(速度)以上2式より
t0を消去してgについてまとめると、(1)式が得ら
れる。これは、図5(b)の状態からこの(1)式で示
される減速度gで減速すれば、同図(c)に示すように
、車間距離が0となったときには相対速度も0になって
いることを意味している。
As shown in FIG. 5(a), consider the case where the vehicle 1 is traveling while maintaining the inter-vehicle distance Lv with respect to the preceding vehicle 2. At this time, as shown in the same figure (b), the inter-vehicle distance L
If an interruption by another preceding vehicle 3 occurs at the position of
In order to proceed by the following distance L and stop (relative speed 0) after t0 seconds while decelerating at the deceleration rate g from the state of , the following two steps are required.
The conditions of the formula must be satisfied. Vr・t0-(g・t02)/2=L...(mileage) Vr-g・t0≦0...(speed) If we eliminate t0 from the above two equations and summarize about g, equation (1) becomes can get. This means that if the state in Figure 5(b) is decelerated at the deceleration g shown by equation (1), the relative speed will also be 0 when the inter-vehicle distance becomes 0, as shown in Figure 5(c). It means that it has become.

【0016】ステップS6では車間距離検出装置11に
より先行車両との車間距離が測定され、この車間距離が
適正な車間距離であるか否かが判定される。その結果、
車間距離が適正な距離になるとプログラムがステップS
1に戻って再度割込み検出動作が行われ、適正な距離で
ない場合はステップS5に戻って減速動作が継続される
In step S6, the inter-vehicle distance detecting device 11 measures the inter-vehicle distance to the preceding vehicle, and it is determined whether this inter-vehicle distance is an appropriate inter-vehicle distance. the result,
When the distance between vehicles becomes appropriate, the program will proceed to step S.
1, the interrupt detection operation is performed again, and if the distance is not appropriate, the process returns to step S5 and the deceleration operation is continued.

【0017】一方、相対速度Vrが0の値をとるという
ことは、車両の車速V=他車両の速度ということである
。従って、この状態で継続して走行しても車間距離が急
激に狭まる可能性は小さいので、ステップS7では緩や
かな減速度、例えば0.1G(Gは重力加速度)以下の
減速度で減速を行う。ステップS8では車間距離検出装
置11により先行車両との車間距離が測定され、この車
間距離が適正な車間距離であるか否かが判定される。 その結果、車間距離が適正な距離になるとプログラムが
ステップS1に戻って再度割込み検出動作が行われ、適
正な距離でない場合はステップS7に戻って減速動作が
継続される。さらに、相対速度Vrが負の値をとるとい
うことは、車速V<他車両の速度ということであり、先
行車両との車間距離は逆に広がってゆくものと予想され
るので、とくに減速は行わずにステップS1に戻って割
込み検出動作が再開される。
On the other hand, when the relative speed Vr takes a value of 0, it means that the vehicle speed V=the speed of the other vehicle. Therefore, even if the vehicle continues to drive in this state, there is a small possibility that the inter-vehicle distance will suddenly narrow, so in step S7, deceleration is performed at a gentle deceleration, for example, at a deceleration of 0.1G (G is gravitational acceleration) or less. . In step S8, the inter-vehicle distance detection device 11 measures the inter-vehicle distance to the preceding vehicle, and it is determined whether this inter-vehicle distance is an appropriate inter-vehicle distance. As a result, if the inter-vehicle distance becomes an appropriate distance, the program returns to step S1 and the interrupt detection operation is performed again; if the inter-vehicle distance is not an appropriate distance, the program returns to step S7 to continue the deceleration operation. Furthermore, if the relative speed Vr takes a negative value, it means that the vehicle speed V is less than the speed of the other vehicle, and the distance between the vehicle and the preceding vehicle is expected to increase, so do not decelerate. The process returns to step S1 and the interrupt detection operation is restarted.

【0018】以上示した動作により、先行車両との車間
距離を適正値に保ち、追突を未然に防止することができ
る。ここで、本実施例では、先行車両との車間距離のみ
ならずこの先行車両との相対速度も考慮して減速を行っ
ているので、例えば相対速度が0の値をとる場合のよう
に急激に減速する必要がないときには緩やかに減速する
ことで運転者に違和感を与えることのない減速動作を行
うことができる。しかも、相対速度の値に応じて減速度
を変化させているので、先行車両に対して常に必要最小
限の減速動作を行いながら適正な車間距離を保つことが
できる、という利点も備えている。
[0018] Through the operations described above, it is possible to maintain the inter-vehicle distance to the preceding vehicle at an appropriate value and prevent a rear-end collision. Here, in this embodiment, deceleration is performed taking into account not only the inter-vehicle distance to the preceding vehicle but also the relative speed with this preceding vehicle, so for example when the relative speed takes a value of 0, By decelerating gently when there is no need to decelerate, it is possible to perform a deceleration operation that does not give the driver a sense of discomfort. Moreover, since the deceleration is changed according to the value of the relative speed, there is also the advantage that an appropriate inter-vehicle distance can be maintained while always performing the necessary minimum deceleration operation with respect to the preceding vehicle.

【0019】なお、一実施例と請求の範囲との対応にお
いて、車間距離検出装置11は車間距離検出手段を、ブ
レーキコントローラ15およびスロットルコントローラ
16は減速手段を、制御装置14は制御手段および相対
速度算出手段を、割込み検出装置12は割込み検出手段
をそれぞれ構成している。
Note that in correspondence between one embodiment and the claims, the inter-vehicle distance detection device 11 serves as an inter-vehicle distance detection means, the brake controller 15 and the throttle controller 16 serve as deceleration means, and the control device 14 serves as a control means and relative speed. The calculation means and the interrupt detection device 12 constitute interrupt detection means, respectively.

【0020】なお、本発明の追突防止装置は、その細部
が上述の一実施例に限定されず、種々の変形例が可能で
ある。一例として、一実施例ではレーザーレーダにより
検出された車間距離の変動に基づいて割込みを検出して
いたが、これに限らず、例えばテレビカメラにより車両
前方を監視して割込みを検出してもよい。
The details of the collision prevention device of the present invention are not limited to the above-mentioned embodiment, and various modifications are possible. As an example, in one embodiment, an interruption is detected based on a change in the inter-vehicle distance detected by a laser radar, but the invention is not limited to this. For example, an interruption may be detected by monitoring the front of the vehicle using a television camera. .

【0021】[0021]

【発明の効果】以上詳細に説明したように本発明によれ
ば、他車両の急な割込み時にも必要以上の急激な減速に
よって運転者に違和感を与えることなく、車両の速度調
節を円滑に行って追突を防止することができる。
[Effects of the Invention] As explained in detail above, according to the present invention, even when another vehicle suddenly cuts in, the speed of the vehicle can be smoothly adjusted without causing discomfort to the driver due to unnecessarily rapid deceleration. This can prevent rear-end collisions.

【図面の簡単な説明】[Brief explanation of drawings]

【図1】本発明のクレーム対応図である。FIG. 1 is a claim correspondence diagram of the present invention.

【図2】本発明の一実施例である追突防止装置の構成を
示すブロック図である。
FIG. 2 is a block diagram showing the configuration of a rear-end collision prevention device that is an embodiment of the present invention.

【図3】車間距離検出装置11および割込み検出装置1
2の動作を説明する図である。
[Fig. 3] Inter-vehicle distance detection device 11 and interruption detection device 1
2 is a diagram illustrating the operation of No. 2. FIG.

【図4】一実施例の動作を説明するためのフローチャー
トである。
FIG. 4 is a flowchart for explaining the operation of one embodiment.

【図5】相対速度Vrが正である場合の減速動作を説明
する図である。
FIG. 5 is a diagram illustrating a deceleration operation when the relative speed Vr is positive.

【符号の説明】[Explanation of symbols]

a  車間距離検出手段 b  減速手段 c  制御手段 d  相対速度算出手段 e  割込み検出手段 1  車両 2、3  先行車両 11  車間距離検出装置 12  割込み検出装置 13  車速センサ 14  制御装置 15  ブレーキコントローラ 16  スロットルコントローラ a Inter-vehicle distance detection means b Deceleration means c Control means d Relative speed calculation means e Interrupt detection means 1 Vehicle 2, 3 Leading vehicle 11 Inter-vehicle distance detection device 12 Interrupt detection device 13 Vehicle speed sensor 14 Control device 15 Brake controller 16 Throttle controller

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】  自車両の前方に存在する先行車両との
車間距離を検出する車間距離検出手段と、前記自車両の
速度を減速させる減速手段と、前記車間距離検出手段に
より検出される車間距離が所定の適正値となるように前
記減速手段を制御する制御手段とを備えた追突防止装置
において、前記先行車両に対する前記自車両の相対速度
を算出する相対速度算出手段と、前記自車両の前方に他
の先行車両の割込みがあったことを検出する割込み検出
手段とを備え、前記制御手段は、前記割込み検出手段に
より割込みが検出されると、前記相対速度算出手段によ
り算出された相対速度に基づいて、前記減速手段による
減速の大きさを変更するように構成されていることを特
徴とする追突防止装置。
1. An inter-vehicle distance detection means for detecting an inter-vehicle distance to a preceding vehicle existing in front of the own vehicle, a deceleration means for decelerating the speed of the own vehicle, and an inter-vehicle distance detected by the inter-vehicle distance detection means. a rear-end collision prevention device comprising: a control means for controlling the deceleration means so that the deceleration means is a predetermined appropriate value; and an interruption detection means for detecting that there is an interruption by another preceding vehicle, and the control means controls the relative speed calculated by the relative speed calculation means when the interruption is detected by the interruption detection means. A rear-end collision prevention device characterized in that the rear-end collision prevention device is configured to change the magnitude of deceleration by the deceleration means based on the above.
JP3108752A 1991-04-12 1991-04-12 Rear-end collision prevention device Expired - Fee Related JP2979707B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3108752A JP2979707B2 (en) 1991-04-12 1991-04-12 Rear-end collision prevention device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3108752A JP2979707B2 (en) 1991-04-12 1991-04-12 Rear-end collision prevention device

Publications (2)

Publication Number Publication Date
JPH04314638A true JPH04314638A (en) 1992-11-05
JP2979707B2 JP2979707B2 (en) 1999-11-15

Family

ID=14492609

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3108752A Expired - Fee Related JP2979707B2 (en) 1991-04-12 1991-04-12 Rear-end collision prevention device

Country Status (1)

Country Link
JP (1) JP2979707B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06219183A (en) * 1992-12-24 1994-08-09 Jaguar Cars Ltd Cruise control device for car
US6418370B1 (en) 1998-08-04 2002-07-09 Denso Corporation Apparatus and method for controlling a target distance and a warning distance between traveling vehicles and a recording medium for storing the control method
JP2003011696A (en) * 2001-06-20 2003-01-15 Hyundai Motor Co Ltd Object recognizing method in intelligent type constant speed traveling system for automobile

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59190948U (en) * 1983-06-07 1984-12-18 日産自動車株式会社 Vehicle running control device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59190948U (en) * 1983-06-07 1984-12-18 日産自動車株式会社 Vehicle running control device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06219183A (en) * 1992-12-24 1994-08-09 Jaguar Cars Ltd Cruise control device for car
US6418370B1 (en) 1998-08-04 2002-07-09 Denso Corporation Apparatus and method for controlling a target distance and a warning distance between traveling vehicles and a recording medium for storing the control method
JP2003011696A (en) * 2001-06-20 2003-01-15 Hyundai Motor Co Ltd Object recognizing method in intelligent type constant speed traveling system for automobile

Also Published As

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