FR2758775A1 - Activation of motor vehicle brake warning lights in anticipation of braking - Google Patents
Activation of motor vehicle brake warning lights in anticipation of braking Download PDFInfo
- Publication number
- FR2758775A1 FR2758775A1 FR9700716A FR9700716A FR2758775A1 FR 2758775 A1 FR2758775 A1 FR 2758775A1 FR 9700716 A FR9700716 A FR 9700716A FR 9700716 A FR9700716 A FR 9700716A FR 2758775 A1 FR2758775 A1 FR 2758775A1
- Authority
- FR
- France
- Prior art keywords
- foot
- brake
- movement
- driver
- warning lights
- 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.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/44—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
- B60Q1/441—Electric switches operable by the driver's pedals
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
La présente invention concerne un dispositif destiné à détecter l'intention de freiner et à déclencher plus tôt l'allumage des feux-stop. The present invention relates to a device intended to detect the intention to brake and to trigger the ignition of the stop lights earlier.
Le délai de réaction d'un conducteur au coup de frein du véhicule qui le précède a une importance particulière. A 130 kilomètres à l'heure, il suffit en effet d'un dixième de seconde pour parcourir 3,6 mètres. On s'est aperçu à ce propos que le remplacement des lampes ordinaires sur le troisième feu-stop par des diodes ou par des lampes au néon, qui font gagner quelques centièmes de seconde dans le délai d'allumage, avait une influence positive indéniable sur la sécurité bien qu'il s'agisse d'un gain de temps minime. Dans certaines situations critiques comme le ralentissement en chaîne de véhicules trop près les uns des autres, chaque centième de seconde compte. Le problème est de savoir où gagner la fraction de seconde qui améliorera encore la sécurité. The reaction time of a driver to the brake application of the vehicle preceding it is of particular importance. At 130 kilometers an hour, it only takes a tenth of a second to travel 3.6 meters. We noticed in this connection that the replacement of ordinary lamps on the third stop lamp by diodes or by neon lamps, which save a few hundredths of a second in the ignition delay, had an undeniable positive influence on security, even though it saves minimal time. In certain critical situations such as slowing down the chain of vehicles too close to each other, every hundredth of a second counts. The problem is where to gain the fraction of a second that will further improve security.
L'invention propose de faire s'allumer les feux-stop avant même que le pied du conducteur ait atteint la pédale de frein. The invention proposes to make the stop lights come on even before the driver's foot has reached the brake pedal.
Le pied droit d'un conducteur, sur les conduites à droite comme sur les conduites à gauche, commande alternativement la pédale d'accélérateur et la pédale de frein. A driver's right foot, on both the right and left pipes, alternately controls the accelerator pedal and the brake pedal.
Pour simplement ralentir sans freiner ou pour changer de vitesse manuellement, le conducteur lève son pied droit selon un mouvement effectué sensiblement dans l'axe de la pédale d'accélérateur. Par contre, s'il a l'intention de freiner, il relève son pied de l'accélérateur et lui imprime instinctivement un mouvement de rotation vers la gauche.To simply slow down without braking or to change gears manually, the driver raises his right foot in a movement made substantially in the axis of the accelerator pedal. On the other hand, if he intends to brake, he raises his foot from the accelerator and instinctively gives him a movement of rotation to the left.
Ce pivotement du pied sur le talon précède le moment où, la pédale de frein ayant été atteinte, les feux-stop s'allument. Or, à partir du moment où le pied part en rotation, c'est qu'il y a une intention immédiate et manifeste de freiner. On dispose d'un délai d'une fraction de seconde entre le moment où le mouvement latéral en direction de la pédale de frein est déclenché et le moment où la pédale de frein est atteinte. Selon l'invention, le dispositif déclenche l'allumage des feux-stop non plus au moment où le frein est actionné mais dès le moment où un ou plusieurs capteurs placés entre les deux pédales ont détecté l'intention de freiner d'après le mouvement du pied vers la gauche.This pivoting of the foot on the heel precedes the moment when, the brake pedal having been reached, the stop lights come on. However, from the moment the foot starts to rotate, there is an immediate and obvious intention to brake. There is a delay of a fraction of a second between the moment when the lateral movement towards the brake pedal is triggered and the moment when the brake pedal is reached. According to the invention, the device triggers the switching on of the brake lights no longer when the brake is applied but from the moment when one or more sensors placed between the two pedals have detected the intention to brake according to the movement from the foot to the left.
II existe diverses façons de détecter la déviation vers la gauche du pied du conducteur. Selon un mode de réalisation du dispositif, les capteurs sont constitués de deux cellules photoélectriques placées entre la pédale d'accélérateur et la pédale de frein de façon à ce que l'extrémité du pied en déplacement latéral vienne couper successivement les faisceaux lumineux parallèles qui éclairent les cellules. Les feuxstop ne s'allument que si le pied a interrompu le faisceau droit avant le faisceau aauche. Ainsi, au retour du pied de la gauche vers la droite, c'est-à-dire du frein ers l'accélérateur, les feux-stop ne s'allument pas. D'autre part, il ne faut pas que les feuxstop s'éteignent entre le moment où le pied a traversé les faisceaux lumineux et le moment où la pédale de frein est atteinte. II y a donc lieu de prévoir par exemple une légère temporisation afin d'assurer si nécessaire une continuité entre les deux déclenchements de l'allumage des feux-stop. There are various ways to detect the deviation to the left of the driver's foot. According to one embodiment of the device, the sensors consist of two photoelectric cells placed between the accelerator pedal and the brake pedal so that the end of the foot in lateral movement successively cuts off the parallel light beams which illuminate cells. The stop lights only come on if the foot has interrupted the right beam before the left beam. Thus, when the foot returns from the left to the right, that is to say from the brake to the accelerator, the stop lights do not come on. On the other hand, the stop lights must not go out between the moment when the foot has passed through the light beams and the moment when the brake pedal is reached. It is therefore necessary to provide for example a slight delay in order to ensure if necessary continuity between the two triggers of the ignition of the stop lights.
Selon un autre mode de réalisation du dispositif, le capteur est constitué d'une tige flexible qui pend par exemple entre les deux pédales. La tige pivote à sa partie supérieure. La déviation du pied vers la gauche entraîne la tige contre un contact électrique qui déclenche l'allumage des feux-stop. Dans l'autre sens, la tige s'écarte du contact et l'allumage est coupé. According to another embodiment of the device, the sensor consists of a flexible rod which hangs, for example, between the two pedals. The rod pivots at its upper part. The deviation of the foot to the left causes the rod against an electrical contact which triggers the brake lights to come on. In the other direction, the rod moves away from the contact and the ignition is cut off.
Plus tôt le capteur détecte le mouvement du pied vers la gauche, plus grand sera le gain de temps à l'allumage des feux-stop. D'un autre côté, plus sensible sera le système et plus les risques de déclenchement intempestif seront grands. Le réglage des capteurs va donc résulter d'un compromis entre rapidité et fiabilité. On ne pourra d'ailleurs pas éviter complètement que les feux-stop s'allument parfois sans nécessité lorsque le conducteur ayant l'intention de freiner et dont le pied a commencé à pivoter se ravise avant que son pied ait atteint la pédale de frein. Quelque chose d'analogue se produit déjà actuellement lorsque le conducteur pose légèrement son pied sur la pédale de frein et l'enlève aussitôt après. II en résulte une mise en garde du conducteur du véhicule qui suit et ceci n'est pas préjudiciable à la sécurité. The sooner the sensor detects the movement of the foot to the left, the greater the time saved when the brake lights are switched on. On the other hand, the more sensitive the system, the greater the risk of inadvertent triggering. The adjustment of the sensors will therefore result from a compromise between speed and reliability. We can not completely prevent the stop lights sometimes come on unnecessarily when the driver intending to brake and whose foot has started to pivot changes before his foot has reached the brake pedal. Something similar is already happening when the driver puts his foot lightly on the brake pedal and takes it off immediately. This results in a warning from the driver of the vehicle which follows and this is not detrimental to safety.
Un problème peut survenir si le conducteur porte de grosses chaussures telles que des après-skis. Ces chaussures risquent d'agir sur le capteur en permanence. II convient donc de prévoir sur le tableau de bord un signal d'allumage des feux-stop et un commutateur de désactivation temporaire du dispositif. A problem can arise if the driver wears large shoes such as après-ski. These shoes may act on the sensor permanently. It is therefore advisable to provide on the dashboard a signal for the brake lights and a switch for temporarily deactivating the device.
Si le dispositif fait gagner par exemple entre un vingtième et un dixième de seconde à l'allumage des feux-stop d'un unique véhicule, il en fait gagner davantage dans le cas d'un ralentissement en chaine d'une file de voitures munies du dispositif. If the device saves, for example, between one twentieth and one tenth of a second when the brake lights of a single vehicle are switched on, it saves more in the event of a chain slowing down of a line of cars equipped of the device.
Le dispositif selon l'invention s'applique à tous les véhicules automobiles. The device according to the invention applies to all motor vehicles.
voitures, camions, autobus, etc. cars, trucks, buses, etc.
La figure 1 représente un dispositif selon l'invention faisant appel à des cellules photoélectriques. (1) est la pédale d'accélérateur. (2) est la pédale de frein. (3) est la position du pied sur l'accélérateur. (4) est la position du pied sur le frein. (5) est l'emplacement des faisceaux lumineux qui éclairent les cellules photoélectriques. FIG. 1 represents a device according to the invention using photoelectric cells. (1) is the accelerator pedal. (2) is the brake pedal. (3) is the position of the foot on the accelerator. (4) is the position of the foot on the brake. (5) is the location of the light beams which illuminate the photocells.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9700716A FR2758775A1 (en) | 1997-01-24 | 1997-01-24 | Activation of motor vehicle brake warning lights in anticipation of braking |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9700716A FR2758775A1 (en) | 1997-01-24 | 1997-01-24 | Activation of motor vehicle brake warning lights in anticipation of braking |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2758775A1 true FR2758775A1 (en) | 1998-07-31 |
Family
ID=9502927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9700716A Withdrawn FR2758775A1 (en) | 1997-01-24 | 1997-01-24 | Activation of motor vehicle brake warning lights in anticipation of braking |
Country Status (1)
Country | Link |
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FR (1) | FR2758775A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2358460A (en) * | 2000-01-20 | 2001-07-25 | Autoliv Dev | Motor vehicle brake-light arrangement |
FR2833227A1 (en) | 2001-12-06 | 2003-06-13 | Renault | Automobile with braking control anticipation comprises braking system having means of estimating emergency situation and means of estimating driver's intention and braking anticipation sensor controlling braking system |
FR2835221A1 (en) | 2002-01-29 | 2003-08-01 | Renault | Emergency brake operation predictor for motor vehicle braking circuit, senses time taken to move foot to brake pedal to initiate braking action |
-
1997
- 1997-01-24 FR FR9700716A patent/FR2758775A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2358460A (en) * | 2000-01-20 | 2001-07-25 | Autoliv Dev | Motor vehicle brake-light arrangement |
WO2001053133A1 (en) * | 2000-01-20 | 2001-07-26 | Autoliv Development Ab | Improvements in or relating to a brake-light arrangement |
FR2833227A1 (en) | 2001-12-06 | 2003-06-13 | Renault | Automobile with braking control anticipation comprises braking system having means of estimating emergency situation and means of estimating driver's intention and braking anticipation sensor controlling braking system |
FR2835221A1 (en) | 2002-01-29 | 2003-08-01 | Renault | Emergency brake operation predictor for motor vehicle braking circuit, senses time taken to move foot to brake pedal to initiate braking action |
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