EP2892760A1 - Method and device for controlling a rear fog light of a motor vehicle - Google Patents

Method and device for controlling a rear fog light of a motor vehicle

Info

Publication number
EP2892760A1
EP2892760A1 EP13756632.9A EP13756632A EP2892760A1 EP 2892760 A1 EP2892760 A1 EP 2892760A1 EP 13756632 A EP13756632 A EP 13756632A EP 2892760 A1 EP2892760 A1 EP 2892760A1
Authority
EP
European Patent Office
Prior art keywords
lamp
threshold
temperature
speed
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.)
Withdrawn
Application number
EP13756632.9A
Other languages
German (de)
French (fr)
Inventor
Paul Henry MATHA
Michel Mahe
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP2892760A1 publication Critical patent/EP2892760A1/en
Withdrawn legal-status Critical Current

Links

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
    • B60Q1/30—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 rear of vehicle, e.g. by means of reflecting surfaces
    • 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
    • B60Q1/0076—Switches therefor
    • 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
    • B60Q1/2603—Attenuation of the light according to ambient luminiosity, e.g. for braking or direction indicating lamps
    • 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
    • B60Q1/30—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 rear of vehicle, e.g. by means of reflecting surfaces
    • B60Q1/303—Rear fog lamps
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • 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
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/05—Special features for controlling or switching of the light beam
    • B60Q2300/052—Switching delay, i.e. the beam is not switched or changed instantaneously upon occurrence of a condition change
    • 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
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/30—Indexing codes relating to the vehicle environment
    • B60Q2300/31—Atmospheric conditions

Definitions

  • the invention relates to your motor vehicles, and more particularly to the control of the rear fog lamp (s) of a vehicle. vehicle.
  • the rear fog lamps of a vehicle are large in size because they must ⁇ thermally resist the lighting of the rear fog lamp in daylight when stopped. Indeed, in such a situation, the temperature in the fog lamp rises rapidly to 150 ', and will continue to rise to 180 ° if the fog lamp remains in operation for a certain time. Also, make fire relatively large fog, for example having a surface of about 50 cm 2, allows use *, ia for achieving these fog lights, plastic materials having an industrially reasonable cost while limiting the risk of melting of these plastic materials during the temperature rise of the fog lamps.
  • a method and a device for controlling a rear vehicle fog lamp limiting the risk of melting plastic materials used for this fog lamp, while using plastic materials having an industrially reasonable cost.
  • a method of controlling a rear fog lamp of a motor vehicle whose lamp is to be supplied with a nominal supply voltage comprising in the presence of a control ignition of said lamp, a nominal voltage supply of the lamp of said lamp conditioned by a threshold of temperature e tereu e of the vehicle. Said power supply at full voltage can be further conditioned by a speed threshold of the vehicle.
  • the method may include reducing the supply voltage in the presence of an outside temperature above the temperature threshold.
  • a device for: controlling a rear fog lamp of a motor vehicle whose lamp is to be supplied with a nominal supply voltage comprising a control input for receiving an ignition control of said lamp. , a first input for receiving information relating to the external temperature of the vehicle, and control means configured for, in the presence of an ignition command of said larnpe, supplying the lamp with nominal voltage provided to receive information outside temperature lower than a temperature threshold,
  • the reduced voltage value can be between 0 V and 9 V.
  • FIG. 1 schematically illustrates an embodiment of a device according to the invention
  • Figure 2 schematically illustrates a. mode of implementation of a method according to the invention
  • Figure 3 illustrates tick diagram m has a simplified mode of implementation of the method according to the invention with a voltage reduction to zero.
  • the reference I generally denotes a computer connected to a control unit 2 for the activation of the fog lamp (s).
  • This block 2 can be for example a steering wheel control.
  • the computer 1 is also connected to a device 3 for measuring the speed of the vehicle, for example coupled to the wheel lock computer (ABS).
  • the computer 1 is also coupled to an external temperature probe 4.
  • the calculator 1 comprises means of. command 10, for example a control logic implemented in the form of a software module, and having a control input BC for receiving the command of aetivation of the fog lamp (s) from block 2, a first input El to receive from the probe 4, information relating to the external temperature of the vehicle, and a second input E2 for receiving, from the measuring device 3, information relating to the speed of the vehicle.
  • the control means 10 comprise an output Si delivering a signal activating an electronic switch 6 driving the power delivered to the fog lamp " in the conventional manner, for example by chopping the current (PWM system: Pulse Width Modulation),
  • a method for controlling a rear fog lamp of a motor vehicle whose lamp is intended to be powered with a nominal supply voltage comprising, in the presence of an ignition control of said lamp, a reduction of the supply voltage of the lamp of said lamp in the presence of an outside temperature of the vehicle exceeding a threshold temperature and a vehicle speed less than a threshold speed for a duration at least equal to a threshold duration.
  • the lamp in the presence of said ignition command of said lamp, the lamp is supplied with the nominal voltage in the presence of a vehicle speed greater than or equal to the threshold speed or in the presence of an outside temperature lower than said threshold temperature.
  • Such a command makes it possible to remain regulatory and to reduce the thermal specifications, and thus makes it possible to achieve a considerable economy of size, for example to pass from a surface of the fog lamp of 50 enf to a surface of 30 cm.
  • control means are furthermore configured for, in the presence of an ignition control of said lamp, supplying said lamp with the nominal voltage in the presence of a higher vehicle speed ⁇ ⁇ « ' equal to the threshold speed in the presence of an outside temperature lower than the threshold temperature,
  • Figure 2 illustrates such a mode of implementation.
  • the threshold temperature is taken equal to 20 ° C. Indeed, it is estimated that above 20 ° C, there is normally no fog.
  • control means 10 control the ignition 100% of the lamp 5 fog lamp (step 22), which corresponds to supply the lamp with its nominal supply voltage, for example 13.5 volts.
  • control means 10 test the value of the vehicle speed with respect to a threshold speed (step 23),
  • This threshold speed is chosen here equal to 3 km / hour.
  • control means 10 control 100% ignition of the lamp 5 of the fog lamp (step 22), which is to supply the lamp with its voltage nominal supply, for example 13.5 volts.
  • step 24 the control means 10 ' n-itiaiise a time counter (step 24). In step 25, this time counter is incremented and, in step 26, the control means 10 test whether the time elapsed since the initialization has reached iiae predefined threshold duration T taken here equal to! minute..
  • control means 10 then control the ignition of the lamp S with a reduced power, for example at 46% of the nominal power.
  • control means reduce the supply voltage of the lamp-5 to bring it for example to around 6 volts (step 28).
  • Step 29 the lamp S remains powered with the reduced supply voltage.
  • step 26 as long as the threshold duration T is not reached, the control means test (step 27) the speed of the vehicle) with respect to the threshold speed. As long as this speed remains below the threshold speed, the third counter is incremented. On the other hand, as soon as the speed becomes greater than the threshold speed, it returns to step 2, L
  • This method of. control can reduce the thermal specifications and reduce the size of the fog lamp. We can thus go from a size of 50 cm 2 to a size of 30 cm 2 .
  • FIG. 3 illustrates a control variant of the fog lamp not included in the speed information count.
  • step 31 the lamp 5 is powered at 100% *, i.e. at the rated voltage.
  • the control means then test the value of the outside temperature at the temperature threshold (step 32). It is taken equal to 30 ° C in this mode of implementation.
  • step 36 the lamp is supplied with a supply voltage 'reduced (step 36), which is in this case equal to If 0 Volt, in other-terms, in this example, turn off the lamp 5.

Abstract

Method of controlling a rear fog light of a motor vehicle whose lamp is intended to be powered with a nominal supply voltage, comprising in the presence of a command to turn on (20) said lamp (S), a reduction (28) of the supply voltage of the lamp of said light in the presence of an exterior temperature of the vehicle that is greater than a threshold temperature and possibly of a speed of the vehicle that is below a threshold speed for a duration at least equal to a threshold duration (T).

Description

Procédé et dispositif de commande d'un feu anti-brouillard arrière d'un véhicule automobile  Method and device for controlling a rear fog lamp of a motor vehicle
L'invention concerne tes véhicules automobiles, et plus particulièrement là commande du ou des feu de brouillard arrière d'un te! véhicule. The invention relates to your motor vehicles, and more particularly to the control of the rear fog lamp (s) of a vehicle. vehicle.
Actuellement, les feux de brouillard arrière d'un véhicule, ont une taille importante car ils doivent ■thermiquement résister à l'allumage du feu de brouillard arrière en plein jour à l'arrêt. En effet, dans une telle situation, la température dans le feu de brouillard monte rapidement à 150', et va continuer à monter vers 180° si le feu de brouillard reste en fonctionnement pendant un certain temps. Aussi, réaliser des feu de brouillard de taille relativement importante, par exemple ayant une surface de l'ordre de 50 cm2, permet d* utiliser, pour ia réalisation de ces feux d brouillard, des matériaux plastique ayant un coût industriellement raisonnable tout en limitant le risque de fusion de ces matériaux plastique lors de l'élévation en température des feux de brouillard. Currently, the rear fog lamps of a vehicle are large in size because they must ■ thermally resist the lighting of the rear fog lamp in daylight when stopped. Indeed, in such a situation, the temperature in the fog lamp rises rapidly to 150 ', and will continue to rise to 180 ° if the fog lamp remains in operation for a certain time. Also, make fire relatively large fog, for example having a surface of about 50 cm 2, allows use *, ia for achieving these fog lights, plastic materials having an industrially reasonable cost while limiting the risk of melting of these plastic materials during the temperature rise of the fog lamps.
Cependant, il est souhaitable actuellement de concevoir des feux de brouillard ayant un encombrement plus réduit, ce qui augmente le risque de fusion des matériaux plastique utilisés actuellement.  However, it is currently desirable to design fog lamps with a smaller footprint, which increases the risk of melting plastic materials currently used.
Selon u «iode de mise en œuvre et de réalisation de l'invention, il est proposé un procédé et un dispositif de commande d'un feu de brouillard de véhicule arrière limitant le risque de fusion des matériaux plastique utilisés pour ce feu de brouillard, tout en utilisant des matériaux plastiqué ayant un coût industriellement raisonnable.  According to a iode implementation and embodiment of the invention, there is provided a method and a device for controlling a rear vehicle fog lamp limiting the risk of melting plastic materials used for this fog lamp, while using plastic materials having an industrially reasonable cost.
Selon un aspect de l'invention il est proposé un procédé de commande d'un feu anti-brouillard arriére d'un véhicule automobile dont la lampe est destinée à être alimentée avec une tension d'alimentation nominale, comprenant en présence d'une commande d'allumage de ladite lampe, une alimentation à tension nominal de la lampe du dit feu conditionnée par un seuil de température e térieu e du véhicule. Ladite alimentation à pleine tension peut être conditionnée en outre par un seuil de vitesse du véhicule. According to one aspect of the invention there is provided a method of controlling a rear fog lamp of a motor vehicle whose lamp is to be supplied with a nominal supply voltage, comprising in the presence of a control ignition of said lamp, a nominal voltage supply of the lamp of said lamp conditioned by a threshold of temperature e tereu e of the vehicle. Said power supply at full voltage can be further conditioned by a speed threshold of the vehicle.
Selon un mode de mise en œuvre, en présence de ladite commande d'allumage de ladite lampe, ladite alimentation de ladite lampe avec la tension nominale est validée .en présence d'une vit esse du véhicule supérieure ou égaie au seuil de vitesse ou en présence d'une température extérieure inférieure ou égale au seuil de température.  According to an implementation mode, in the presence of said ignition command of said lamp, said supply of said lamp with the nominal voltage is validated .in presence of a vehicle esse superior or equal to the speed threshold or in presence of an outside temperature lower than or equal to the temperature threshold.
Le procédé peut comprendre «ne réduction de la tension d'alimentation, en présence d'une: température extérieure supérieure au seuil de température.  The method may include reducing the supply voltage in the presence of an outside temperature above the temperature threshold.
Ladite réduction de la tension d'alimentation peut être validée lorsque la -température extérieure est supérieure -au seuil- de température pendant it né- durée au moins égale à une durée seuil..  Said reduction of the supply voltage can be validated when the outside temperature is higher than the temperature threshold during it has a duration at least equal to a threshold duration.
Selon un autre aspect ii est proposé un dispositif de: commande d'un feu anti-brouillard arrière d'un, véhicule automobile dont la lampe est destinée à être alimentée avec une tension d'alimentation nominale, comprenant une entrée de c-o mande pour recevoir' une commande d'allumage de Ladite lampe., une première entrée pour recevoir une information relative à la température, extérieure du véhicule, et des moyens de commande configures pour, en présence d'une commande d'allumage de ladite larnpe, alimenter la lampe à tension nominale à condition de recevoir une information de température extérieure inférieure à un seuil de température, In another aspect, there is provided a device for: controlling a rear fog lamp of a motor vehicle whose lamp is to be supplied with a nominal supply voltage, comprising a control input for receiving an ignition control of said lamp. , a first input for receiving information relating to the external temperature of the vehicle, and control means configured for, in the presence of an ignition command of said larnpe, supplying the lamp with nominal voltage provided to receive information outside temperature lower than a temperature threshold,
Selon un mode de réalisation, le dispositif comprend une deuxième entrée pour recevoir une information relative à la vitesse du véhicule, de façon à alimenter la lampe à tension nominale à condition de recevoir une information de vitesse du véhicule supérieure à un seuil de vitesse.  According to one embodiment, the device comprises a second input for receiving information relating to the speed of the vehicle, so as to supply the nominal voltage lamp provided to receive a vehicle speed information above a speed threshold.
Les moyens de commande peuvent être en outre configurés pour, en présence d'une commande d'allumage de ladite lampe, réduire Sa tension d'alimentation en présence d'une température extérieure supérieure au seuil de température. Les moyens de commande peuvent être es o tre configurés pour réduire la tension d'alimentation lorsque la température extérieure est supérieure au seuil de température pendant une durée au moins égaie à une du ée seuil, par exempte fixée par une temporisation, The control means may be further configured to, in the presence of an ignition control of said lamp, reduce its supply voltage in the presence of an outside temperature above the temperature threshold. The control means may be configured to reduce the supply voltage when the outside temperature is greater than the temperature threshold for a duration at least equal to one of the threshold, for example fixed by a time delay,
La valeur de tension réduite peut être comprise entre 0 V et 9 V . D'antres avantages et caractéristiques de l'invention apparaîtront à l'examen de la description détaillée de modes de mise en œuvre et de réalisation nullement limitatifs, et des dessins annexés sur lesquels :  The reduced voltage value can be between 0 V and 9 V. Other advantages and characteristics of the invention will become apparent on examining the detailed description of embodiments and embodiments that are in no way limitative, and the appended drawings in which:
la figure 1 illustre .scbématiquement un mode de réalisation d'un dispositif selon l'invention,  FIG. 1 schematically illustrates an embodiment of a device according to the invention,
la figure 2 illustre schématiquement un. mode de mise e ii œuvre- d'un procédé selon l'invention, et la figure 3 illustre schéma tique m eut un mode simplifié de mise en œuvre du procédé selon l'invention avec une réduction de tension à zéro. Sur la figure 1, la référence I désigne globalement un calculateur connecté à un bloc 2. de commande d'aetivation du ou des feux de brouillard. Ce bloc 2 peut être par exemple une commande sous volant.  Figure 2 schematically illustrates a. mode of implementation of a method according to the invention, and Figure 3 illustrates tick diagram m has a simplified mode of implementation of the method according to the invention with a voltage reduction to zero. In FIG. 1, the reference I generally denotes a computer connected to a control unit 2 for the activation of the fog lamp (s). This block 2 can be for example a steering wheel control.
Le calculateur 1 est également connecté à un dispositif 3 de mesure de la vitesse du véhicule, par exem le couplé au calculateur d'aati blocage des roués (ABS). Le calculateur l est également couplé à une sonde 4 de température extérieure. Le calculateur 1 comprend des moyens de. commande 10, par exemple une logique de commande réalisée sous forme d'un module logiciel, et comportant une entrée de commande BC pour recevoir la commande d'aetivation du ou des feux de brouillard en provenance du bloc 2, une première entrée El pour recevoir, en provenance de la sonde 4, une information relative à la température, extérieure du véhicule, et une deuxième entrée E2 pour recevoir, en provenance du .dispositif de mesure 3, une information relative à la vitesse du véhicule. Les moyens de commande 10 comportent une sortie Si délivrant un signal activant un commutateur électronique 6 pilotant ia puissance délivrée à la lampe dis feu de brouillard» de façon classique, par exemple par hachage du courant (système PWM : Puise Width Modulat on), The computer 1 is also connected to a device 3 for measuring the speed of the vehicle, for example coupled to the wheel lock computer (ABS). The computer 1 is also coupled to an external temperature probe 4. The calculator 1 comprises means of. command 10, for example a control logic implemented in the form of a software module, and having a control input BC for receiving the command of aetivation of the fog lamp (s) from block 2, a first input El to receive from the probe 4, information relating to the external temperature of the vehicle, and a second input E2 for receiving, from the measuring device 3, information relating to the speed of the vehicle. The control means 10 comprise an output Si delivering a signal activating an electronic switch 6 driving the power delivered to the fog lamp " in the conventional manner, for example by chopping the current (PWM system: Pulse Width Modulation),
Selon un mode de mise en oeuvre de l'invention, il est proposé un procédé de commande d'un feu anti-brouillard arrière d'un véhicule automobile dont la lampe est destinée à être alimentée avec «ne tension d'alimentation nominale, ce procédé comprenant, en présence d'une commande d'allumage de ladite lampe, une réduction de la tension d'alimentation de la lampe dudit feu en présence d'une température extérieure du véhicule supérieure à une température seuil et d'une vitesse du véhicule inférieure à une vitesse-seuil pendant une durée au moins égale à une durée seuil.  According to an embodiment of the invention, there is provided a method for controlling a rear fog lamp of a motor vehicle whose lamp is intended to be powered with a nominal supply voltage, which method comprising, in the presence of an ignition control of said lamp, a reduction of the supply voltage of the lamp of said lamp in the presence of an outside temperature of the vehicle exceeding a threshold temperature and a vehicle speed less than a threshold speed for a duration at least equal to a threshold duration.
Par contre, en présence de ladite commande d'allumage de ladite lampe, on alimente ia lampe avec la tension nominale en présence d'une vitesse du véhicule supérieure ou égals à la vitesse- seuil ou en présence d'une température extérieure inférieure à ladite température seuil.  On the other hand, in the presence of said ignition command of said lamp, the lamp is supplied with the nominal voltage in the presence of a vehicle speed greater than or equal to the threshold speed or in the presence of an outside temperature lower than said threshold temperature.
En d'autres termes, lorsque ia vitesse du véhicule est nulle ou très faible, et dans certaines conditions de température extérieure, on réduit la tension d'alimentation de la lampe du. feu de brouillard afin que celui-ci chauffe moins. Par contre, si le véhicule redémarre, on réalirrienie la lampe avec la tension d'alimentation nominale.  In other words, when the vehicle speed is zero or very low, and under certain outside temperature conditions, the supply voltage of the lamp is reduced. fog fire so that it heats less. On the other hand, if the vehicle restarts, the lamp is realized with the nominal supply voltage.
Une telle commande permet de rester réglementaire et de diminuer le cahier des charges thermique, et permet ainsi de réaliser une économie notable de taille, pour passer par exemple d'une surface du feu antibrouillard de 50 enf à une surface de 30 croA  Such a command makes it possible to remain regulatory and to reduce the thermal specifications, and thus makes it possible to achieve a considerable economy of size, for example to pass from a surface of the fog lamp of 50 enf to a surface of 30 cm.
Sur le plan de la réalisation matérielle, les moyens de commande du dispositif sont configurés pour, en présence d'une commande d'allumage de ladite lampe, réduire la tension d'alimentation de ia lampe en présence d'une température extérieure supérieure à une température seuil ei d'une vitesse du véhicule inférieure à «ne vitesse-seuil pendant une durée au moins égale à «ne durée seuil. In terms of the hardware embodiment, the control means of the device are configured to, in the presence of an ignition control of said lamp, reduce the supply voltage of the lamp in the presence of an outside temperature greater than one. threshold temperature ei of a vehicle speed less than "threshold speed for a duration at least equal to" threshold duration.
El les moyens de commande sont en outre configurés pour, en présence d'une commande d'allumage de ladite lampe, alimenter ladite lampe avec la tension nominale en présence d'une vitesse du véhicule supérieure ·ο«' égale à la vitesse-seuil ois en présence d'une température extérieure inférieure à ladite température seuil, And the control means are furthermore configured for, in the presence of an ignition control of said lamp, supplying said lamp with the nominal voltage in the presence of a higher vehicle speed · ο « ' equal to the threshold speed in the presence of an outside temperature lower than the threshold temperature,
La figure 2 illustre un tel mode de mise en œuvre.  Figure 2 illustrates such a mode of implementation.
Sur cette figure, on voit qu'en présence de la réception 20 d'une commande d" activât i n de la lampe 5 effectué par le conducteur, les moyens de commande 10 testent tout d'abord la température extérieure par rapport à une température seuil dans Mue étape 21.  In this figure, it can be seen that, in the presence of the reception 20 of an activation command of the lamp 5 made by the driver, the control means 10 first test the outside temperature with respect to a threshold temperature in step 21.
Dans l'exemple décrit ici, la température seuil est prise égale à 2Q°C. En effet, on estime qu'au-delà de 20°C, il n'y a normalement pas de brouillard.  In the example described here, the threshold temperature is taken equal to 20 ° C. Indeed, it is estimated that above 20 ° C, there is normally no fog.
Par ailleurs, On estime qu'en présence d'une température extérieure inférieure à 20'9C, le refroidissement du feu de brouillard est suffisant. Furthermore, It is estimated that the presence of an outside temperature of less than 20 '9 C, the fog lamp cooling is sufficient.
Dans ces conditions, si la température extérieure est inférieure à 2Û°C. alors les moyens de commande 10 commandent l'allumage à 100% de la lampe 5 du feu de brouillard (étape 22), ce qui correspond à alimenter la lampe avec sa tension nominale d'alimentation, par exemple 13, 5 volts.  Under these conditions, if the outside temperature is below 20 ° C. then the control means 10 control the ignition 100% of the lamp 5 fog lamp (step 22), which corresponds to supply the lamp with its nominal supply voltage, for example 13.5 volts.
Far contre, si la température extérieure est supérieure à 20°C, alors les moyens de commande 10 testent la valeur de la vitesse d« véhicule par rapport à une vitesse-seuil (étape 23),  For cons, if the outside temperature is greater than 20 ° C, then the control means 10 test the value of the vehicle speed with respect to a threshold speed (step 23),
Cette vitesse-seuil est choisie ici égale à 3 km/heure.  This threshold speed is chosen here equal to 3 km / hour.
Dans le cas où la vitesse est supérieure à 3 km/heure, alors les moyens de commande 10 commandent l'allumage à 100% de la lampe 5 du feu de brouillard (étape 22), ce qui correspond à alimenter la lampe avec sa tension nominale d'alimentation, par exemple 13, 5 volts.  In the case where the speed is greater than 3 km / hour, then the control means 10 control 100% ignition of the lamp 5 of the fog lamp (step 22), which is to supply the lamp with its voltage nominal supply, for example 13.5 volts.
Par contre, si la vitesse est inférieure à 3 km/heure, alors, les moyens de commande 10 i'n-itiaiisent un compteur temporel (étape 24). Dans l'étape 25, ce compteur temporel est incréments et, dans l'étape 26, les moyens de commande 10 testent si la durée écoulée depuis l'initialisation a atteint iiae durée seuil prédéfini T prise égaie ici à ! minute.. On the other hand, if the speed is less than 3 km / hour, then, the control means 10 ' n-itiaiise a time counter (step 24). In step 25, this time counter is incremented and, in step 26, the control means 10 test whether the time elapsed since the initialization has reached iiae predefined threshold duration T taken here equal to! minute..
Dana k cas où la durée dépasse La durée seuil T, les moyens de commande 10 commandent alors l'allumage de la lampe S avec une puissance réduite, par exemple à 46% de la puissance nominale.  In the case where the duration exceeds the threshold duration T, the control means 10 then control the ignition of the lamp S with a reduced power, for example at 46% of the nominal power.
En d'autres termes, les moyens de commande réduisent la tension d'alimentation de la lampe- 5 pour l'amener par exemple aux alentours de 6 volts (étape 28).  In other words, the control means reduce the supply voltage of the lamp-5 to bring it for example to around 6 volts (step 28).
Tant que la vitesse du véhicule reste inférieure à Sa vitesse- seuil (3 km/heure); (étape 29), la lampe S reste alimentée avec la tension d'alimentation réduite.  As long as the vehicle speed remains below its threshold speed (3 km / hour); (Step 29), the lamp S remains powered with the reduced supply voltage.
Par contre, dès que la vitesse devient supérieure -à ia vitesse seuil, on revient à l'étape 21.  On the other hand, as soon as the speed becomes higher than the threshold speed, it returns to step 21.
Par ailleurs, dans l'étape .26, tant que la durée seuil T n'est pas atteinte, les moyens de commande testent (étape 27) la vitesse du véhicule) par rapport à la vitesse- seuil. Tant que cette vitesse reste inférieure à la vitesse seuil, 3e compteur est incrémenié, Par contre, dès que la vitesse devient supérieure à la vitesse seuil, on revient à l'étape 2,L  Furthermore, in step 26, as long as the threshold duration T is not reached, the control means test (step 27) the speed of the vehicle) with respect to the threshold speed. As long as this speed remains below the threshold speed, the third counter is incremented. On the other hand, as soon as the speed becomes greater than the threshold speed, it returns to step 2, L
Et. lors du retour à cette étape 21, si les conditions de température et de- vitesse sont à nouveau réunies, on réaliménte la lampe à la tension nomin le.  And when returning to this step 21, if the temperature and speed conditions are again met, the lamp is brought to life at the nominal voltage.
Ce procédé de. commande permet de diminuer le cahier des charges thermique et de diminuer la taille du feu de brouillard. On peut ainsi passer d'une taille de 50 cm2 à une taille de 30 cm2. This method of. control can reduce the thermal specifications and reduce the size of the fog lamp. We can thus go from a size of 50 cm 2 to a size of 30 cm 2 .
La figure 3 illustre une variante de commande du feu antibrouillard ne nant pas en compte d'information de vitesse.  FIG. 3 illustrates a control variant of the fog lamp not included in the speed information count.
Dans une étape 30, ie compteur temporel (temporisation T) est initial isé à zéro.  In a step 30, the timer (timer T) is initialized to zero.
Dans l'étape 31, la lampe 5 est alimentée à 100%* c'est-à-dire à la tension nominale. Les moyens de commande testent alors la valeur de la température extérieure au seuil de température (étape 32). Celui-ci est pris égal à 30°C dans ce mode de mise en œuvre. In step 31, the lamp 5 is powered at 100% *, i.e. at the rated voltage. The control means then test the value of the outside temperature at the temperature threshold (step 32). It is taken equal to 30 ° C in this mode of implementation.
SI la température extérieure est inférieure ou égale au seuil de température, on. réinitialise le compteur, temporel (étape 33),  If the outside temperature is less than or equal to the temperature threshold, then. resets the counter, time (step 33),
Dasis le cas contraire, on incrémente le compteur (étape 34), ei o« teste si îa valeur du compteur atteint une durée seuil T prise égale ici à 5 iiïi! (étape 35).  In the opposite case, the counter is incremented (step 34), and it tests whether the value of the counter reaches a threshold duration T.sub.0 taken here equal to 5. (step 35).
Sx la durée est supérieure ou égale à T, alors on alimente la lampe avec une tension d'alimentation' réduite (étape 36), qui est dans Se cas présent égale à 0 Volt, En d'autres termes-, dans cet exemple on éteint la lampe 5. Sx duration is greater than or equal to T, then the lamp is supplied with a supply voltage 'reduced (step 36), which is in this case equal to If 0 Volt, in other-terms, in this example, turn off the lamp 5.

Claims

REVENDICATIONS
1. Procédé de commande d'un feu anti-brouillard arrière d'un véhicule automobile dont la lampe est destinée à être alimentée avec une tension d'alimentation nominale, comprenant, en présence d'une commande d'allumage (20) de ladite- lampe (5), une alimentation (22) à tension nominale de la lampe dttdit feu conditionnée (21) par un seuil de température extérieure du véhicule. 1. Method for controlling a rear fog light of a motor vehicle whose lamp is intended to be powered with a nominal supply voltage, comprising, in the presence of an ignition control (20) of said - lamp (5), a power supply (22) at nominal voltage of the dttdit fire lamp conditioned (21) by an exterior temperature threshold of the vehicle.
2, Procédé selon l revendication 1. clans lequel ladite alimentation (22) à pleine tension est conditionnée en outre par uti seuil de vitesse du véhicule. 2, Method according to claim 1. in which said power supply (22) at full voltage is further conditioned by a vehicle speed threshold.
3, Procédé selon la revendication i ou 2, dans lequel en présence de ladite commande d'allumage (20) de ladite lampe (5), ladite alimentation (22) de ladite lampe àvee là tension nominale est validée en présence d'une vitesse du véhicule supérieure ou égaie au seuil de vitesse ou en -présence d'une température extérieure inférieure ou égale au seuil de température. 3, Method according to claim i or 2, in which in the presence of said ignition control (20) of said lamp (5), said power supply (22) of said lamp at the nominal voltage is validated in the presence of a speed of the vehicle greater than or equal to the speed threshold or in the presence of an exterior temperature less than or equal to the temperature threshold.
4, Procédé selon l'une des revendications' précédentes Comprenant une réduction (28) de la tension d'alimentation en présence d'une température extérieure supérieure au seuil de température. 4, Method according to one of the preceding claims comprising a reduction (28) of the supply voltage in the presence of an external temperature greater than the temperature threshold.
5. Procédé selon, la revendication. 4, dans lequel ladite réduction (28) de la tension d'alimentation est validée lorsque la température extérieure est supérieure au seuil de température pendant une durée au moins égale à une durée seuil (T). 5. Method according to claim. 4, in which said reduction (28) of the supply voltage is validated when the outside temperature is higher than the temperature threshold for a duration at least equal to a threshold duration (T).
6. Dispositif de commande d'un feu anti-brouillard arrière d'un véhicule automobile dont la lampe est destinée à être alimentée avec une tension d'alimentation nominale, comprenant une entrée de commande (£C) pour recevoir une commande d'allumage de ladite' lampe, une première entrée (El) pour recevoir une in formation relative, à la température extérieure du véhicule,, et des moyens de commande (10) configurés pour, es présence d'une commande d'allumage de ladite lampe, alimenter la lampe à tension nominale à condition de recevoir une: information de température extérieure inférieure à an seuil de température, 6. Device for controlling a rear fog light of a motor vehicle whose lamp is intended to be powered with a nominal supply voltage, comprising a control input (£C) for receiving an ignition command of said lamp , a first input (El) for receiving information relating to the exterior temperature of the vehicle, and control means (10) configured for the presence of an ignition command for said lamp, power the lamp at nominal voltage provided that receive: exterior temperature information lower than a temperature threshold,
7. Dispositif selon la revendication 6, comprenant une deuxième entrés (E2) pour recevoir u.»e information relative à la vitesse du véhicule, de façon â alimenter la lampe à tension nominale à condition de recevoir «ne information de vitesse du véhicule supérieure à un seul! de vitesse. 7. Device according to claim 6, comprising a second input (E2) for receiving information relating to the speed of the vehicle, so as to power the lamp at nominal voltage on condition of receiving higher vehicle speed information to just one! of speed.
8. Dispositif selon l'une des revendications 6 ou ?, dans lequel les moyens de commande (10) sont en outre configurés pour, en présence d'une commande d'allumage de ladite lampe, réduire la. tension d'alimentation en présence d'une température extérieure supérieure au seuil de température. 8. Device according to one of claims 6 or ?, wherein the control means (10) are further configured to, in the presence of a command to switch on said lamp, reduce the. supply voltage in the presence of an external temperature above the temperature threshold.
9. Dispositif selon la revendication 8, dans lequel Ses moyens de commande (10) sont en outre configurés pour réduire ia tension d'alimentation lorsque là température extérieure est supérieure au seuil de température pendan une durée au moins égale à une durée seuil (T), 9. Device according to claim 8, wherein its control means (10) are further configured to reduce the supply voltage when the external temperature is greater than the temperature threshold for a duration at least equal to a threshold duration (T ),
10. Dispositif selon l'une des revendications 8 on 9, dans lequel les moyens de commande (.10} sont configurés pour réduire la tension d'alimentation à une valeur de tension réduite comprise entre 0 V et 9 V. 10. Device according to one of claims 8 to 9, in which the control means (.10} are configured to reduce the supply voltage to a reduced voltage value of between 0 V and 9 V.
EP13756632.9A 2012-09-07 2013-07-31 Method and device for controlling a rear fog light of a motor vehicle Withdrawn EP2892760A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1258377A FR2995268B1 (en) 2012-09-07 2012-09-07 METHOD AND DEVICE FOR CONTROLLING A REAR FOG LIGHT IN A MOTOR VEHICLE
PCT/FR2013/051845 WO2014037640A1 (en) 2012-09-07 2013-07-31 Method and device for controlling a rear fog light of a motor vehicle

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EP2892760A1 true EP2892760A1 (en) 2015-07-15

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EP (1) EP2892760A1 (en)
JP (1) JP2015527256A (en)
KR (1) KR20150052849A (en)
CN (1) CN104684759A (en)
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WO (1) WO2014037640A1 (en)

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KR20150052849A (en) 2015-05-14
JP2015527256A (en) 2015-09-17
FR2995268B1 (en) 2015-07-17
WO2014037640A1 (en) 2014-03-13
CN104684759A (en) 2015-06-03
US20150224921A1 (en) 2015-08-13
FR2995268A1 (en) 2014-03-14

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