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EP0791780B1 - Vehicle headlight with a single light source for dipped and distance light - Google Patents

Vehicle headlight with a single light source for dipped and distance light Download PDF

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Publication number
EP0791780B1
EP0791780B1 EP97400367A EP97400367A EP0791780B1 EP 0791780 B1 EP0791780 B1 EP 0791780B1 EP 97400367 A EP97400367 A EP 97400367A EP 97400367 A EP97400367 A EP 97400367A EP 0791780 B1 EP0791780 B1 EP 0791780B1
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EP
European Patent Office
Prior art keywords
headlight
headlight according
support point
point
respect
Prior art date
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Expired - Lifetime
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EP97400367A
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German (de)
French (fr)
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EP0791780A1 (en
Inventor
Hector Fratty
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Valeo Vision SAS
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Valeo Vision SAS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors

Definitions

  • the present invention relates generally to motor vehicle headlamps.
  • It relates more particularly to a projector likely to emit a passing beam and a road beam.
  • a headlamp with a single source in this case a monofilament lamp, which cooperates with a suitable reflector to tilt around a horizontal axis perpendicular to its optical axis.
  • a projector capable of emitting with a light source single (such as a filament or an arc) and a single mirror these two types of beams.
  • the mirror includes a fixed part and one or more mobile parts, the moving moving parts using actuators suitable for switching from one type of beam to the other.
  • the present invention proposes to achieve the same objective with simpler and less costly means.
  • Another object of the present invention is to provide effectively the marriage of a switching device mirror tipping road crossing and others beam correction devices in the same projector.
  • the present invention firstly provides a motor vehicle headlamp as defined in the claim 1.
  • the invention proposes a set of two left or right projectors as defined in claim 16.
  • the invention proposes a set of two left and right projectors such as defined in claim 17.
  • a projector which comprises, in a housing 30 closed by a glass (not shown), a mirror 20 in which is mounted a lamp 10.
  • the filament or arc lamp defines a source unique light.
  • the mirror is mounted, conventionally per se, on three support points arranged at the three vertices of a right triangle, in order to authorize the modification of the orientation of the beam in elevation (vertically) and in azimuth (horizontally).
  • points of support by example a localized mounting of a rear part of the mirror, on a head forming a ball joint connected to the housing of the projector.
  • the devices CD and CR both intervene at point V, and there are two manual correction devices CM intervening at point H and at point V, respectively.
  • the CD device conventionally allows adjustment dynamic on site, while the CR device, by acting at the fulcrum V, selectively generates the beam F1 or beam F2 illustrated in FIG. 4.
  • the beam F1 is a beam conventional "V" cut, in accordance with European regulations in this area.
  • the mirror 20 is designed to ability to generate this type of cut beam without resorting to a concealment cup, and those skilled in the art will refer to earlier patents in the name of the plaintiff on this topic.
  • the mirror 20 is designed, as also described in the aforementioned patents, to generate a beam having the required width without the using prisms or spreading streaks on the closing glass. This ice can therefore be smooth or very slightly deviating.
  • the beam F2 is simply raised vertically with respect to the beam F1, to illuminate the road at a greater distance in front the vehicle. If necessary, the beam F2 can be completed by a narrower beam F3 and concentrated on the axis of the road. This additional beam can be realized with a second projector. But given the fact that the amount of light it has to provide is very noticeably reduced compared to a conventional road projector, it can be both horizontal and vertical extremely small, and does not clutter the front of the vehicle.
  • a projector complementary having a height and a width of a few centimeters to ten centimeters.
  • Figure 3 schematically illustrates an example of realization of the combination of CM, CD and CR devices at the fulcrum V. It includes a single actuator linear 55 with multiple positions for the functions of CD and CR devices, which control the translation of a rod 51, the front end of which is threaded at 51a. By order linear actuator 55 simultaneously ensures the passing of the passing beam at driving beam and vice versa and, in the mode of crossover, the dynamic correction function based variations in attitude.
  • the manual corrector CM located at point V includes a control button 54 driving a set of sprockets 53 which rotates the rod 51, the latter having at this level a section for example square, and being able to slide axially relative to the pinion with which it is engaged.
  • the threaded part 51a is engaged with a part 52 trapped in a cage 21 provided at the rear of the mirror 20 and simultaneously forming a ball and nut for said threaded part. In this way, we can give the stem threaded 51 and in the mirror a mutual reference position, dynamic correction and crossing-road switching based on this reference.
  • the crossing-road switching takes place at two points, PF and V, so as to obtain, to pass from the passing beam F1 to the driving beam F2, the combination of upward movement and lateral displacement, as shown in figure 8.
  • the beam raising angle is chosen so as to provide road lighting in the distant, with sufficient intensity (typically a 1.5% increase), while the lateral shift angle is chosen so as to center the spot of concentration of the passing beam F1 in the center line of the road. It is necessary know indeed that a classic passing beam has a spot of concentration which is offset towards the side of the road, so as to favor lighting of this aisle, and the purpose of the offset is to bring this spot of concentration in the axis. The value of this angular displacement, which therefore takes place to the left for a right-hand traffic direction, is for example 3%.
  • this is achieved using the CR switching devices so that they cause two different translation values of the support points PF and V, with a larger value at point V.
  • the translation at point PF gives the lateral component of the displacement
  • the difference between translations at points PF and V gives the vertical component of the displacement.
  • the two manual correction devices allow beam reference adjustment both on site (action at point V) only in azimuth (action at point H).
  • the dynamic correction device acts, conventionally, in point V.
  • the crossing-road switching device is remarkable in this embodiment in that it acts at a single point, namely the fixed point PF, to make turn the mirror around an axis passing through the diagonal of the right triangle, which joins the moving points H and V.
  • the left projector has an optical axis x G x G and three support points PF G , H G and V G.
  • the right headlamp has an optical axis x D x D and three support points PF D , H D and V D.
  • the two right triangles whose respective support points define the vertices are symmetrical with respect to a median vertical plane of the vehicle.
  • Figure 14 shows three dots at the bottom support PF, H and V, with two elements of the CR-crossover switching provided respectively for points H and V.
  • the displacement stroke D of the element of CR switch placed at support point H must be important, being able to reach in some cases 20 mm. This implies a possibility of significant movement of the mirror 20 in the housing 30, and therefore an oversizing of the case.
  • this variant provides carry out the crossing-road switching by adding a third element CR 'at the point of support PF, and giving the switching movements at points PF and H of reverse directions but of the same amplitude, namely a amplitude D / 2 equal to half that required at the point H in the embodiment of Figure 14.
  • the dynamic corrector stroke is 8 mm.
  • the travel of the switch CR1 will for example be 4 mm, while the travel of the CR2 switch will be 3 mm.
  • the switching elements road-crossing whose function is that of actuators linear with two discrete positions, can be constituted by two-position electromagnets, by torque-locked motors or by stepper motors.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)

Description

La présente invention a trait d'une façon générale aux projecteurs de véhicules automobiles.The present invention relates generally to motor vehicle headlamps.

Elle concerne plus particulièrement un projecteur susceptible d'émettre un faisceau de croisement et un faisceau de route.It relates more particularly to a projector likely to emit a passing beam and a road beam.

On connaít déjà notamment par le document FR-A-1 461 607 un projecteur comportant une source unique, en l'espèce une lampe monofilament, qui coopère avec un réflecteur apte à basculer autour d'un axe horizontal perpendiculaire à son axe optique.We already know in particular from document FR-A-1 461 607 a headlamp with a single source, in this case a monofilament lamp, which cooperates with a suitable reflector to tilt around a horizontal axis perpendicular to its optical axis.

Dans sa position basculée vers le bas, on réalise un faisceau de croisement non éblouissant, tandis qu'un relèvement du miroir permet d'obtenir un faisceau de route de plus longue portée.In its tilted down position, a non-dazzling passing beam, while a raising the mirror makes it possible to obtain a driving beam longer range.

Ce projecteur connu présente cependant une mise en oeuvre totalement inadaptée aux projecteurs modernes, et notamment ceux pourvus en outre de moyens de correction d'orientation de faisceau en site ou en azimut, manuels ou automatiques.This known projector, however, has an implementation work totally unsuitable for modern projectors, and in particular those provided with correction means beam orientation in elevation or azimuth, manual or automatic.

On connaít également par le document DE-A-44 18 733, un projecteur susceptible d'émettre avec une source lumineuse unique (telle qu'un filament ou un arc) et un miroir unique ces deux types de faisceaux. A cet effet, le miroir comprend une partie fixe et une ou plusieurs parties mobiles, le déplacement des parties mobiles à l'aide d'actuateurs appropriés permettant de passer d'un type de faisceau à l'autre.We also know from document DE-A-44 18 733, a projector capable of emitting with a light source single (such as a filament or an arc) and a single mirror these two types of beams. For this purpose, the mirror includes a fixed part and one or more mobile parts, the moving moving parts using actuators suitable for switching from one type of beam to the other.

Cette approche est cependant désavantageuse en ce qu'elle complique grandement la conception et la fabrication du miroir, et induit dans certains cas, notamment aux interfaces entre partie fixe et partie(s) mobile(s), des pertes de lumière ou des défauts optiques.This approach is, however, disadvantageous in that that it greatly complicates design and manufacturing of the mirror, and induced in certain cases, in particular interfaces between fixed part and mobile part (s), light losses or optical defects.

Enfin le document DE-A-37 22 581, qui enseigne un projecteur conforme au préambule de la revendication 1, prévoit d'utiliser un miroir d'un seul tenant coopérant avec une source unique, et deux organes de déplacement ou davantage pour effectuer le passage d'un faisceau de croisement à un faisceau de route et réciproquement.Finally document DE-A-37 22 581, which teaches a headlamp in accordance with the preamble of claim 1, plans to use a one-piece mirror cooperating with a single source, and two displacement members or more to pass a beam of crossing a road beam and vice versa.

La présente invention se propose d'atteindre le même objectif avec des moyens plus simples et moins coûteux.The present invention proposes to achieve the same objective with simpler and less costly means.

Un autre objet de la présente invention est d'assurer efficacement le mariage d'un dispositif de commutation croisement route à basculement de miroir et d'autres dispositifs de correction de faisceaux dans un même projecteur.Another object of the present invention is to provide effectively the marriage of a switching device mirror tipping road crossing and others beam correction devices in the same projector.

Ainsi la présente invention propose tout d'abord un projecteur de véhicule automobile tel que défini dans la revendication 1.Thus the present invention firstly provides a motor vehicle headlamp as defined in the claim 1.

Des aspects préférés, mais non limitatifs, de ce projecteur sont exposés dans les revendications 2 à 15.Preferred, but not limiting, aspects of this The headlamp are set out in claims 2 to 15.

Selon un deuxième aspect, l'invention propose un ensemble de deux projecteurs gauche ou droit tel que défini dans la revendication 16.According to a second aspect, the invention proposes a set of two left or right projectors as defined in claim 16.

Enfin, selon un troisième aspect, l'invention propose un ensemble de deux projecteurs gauche et droit tel que défini dans la revendication 17.Finally, according to a third aspect, the invention proposes a set of two left and right projectors such as defined in claim 17.

D'autres aspects, buts et avantages de la présente invention apparaítront mieux à la lecture de la description détaillée suivante de formes de réalisation préférées de celle-ci, donnée à titre d'exemple et faite en référence aux dessins annexés, sur lesquels :

  • la figure 1 est une vue schématique en perspective illustrant les trois points d'appui du miroir et l'axe optique d'un projecteur selon une première forme de réalisation de l'invention,
  • la figure 2 est une vue partielle en coupe du projecteur, selon la ligne II-II de la figure 1,
  • la figure 3 est une vue à échelle agrandie d'un détail de la figure 2,
  • la figure 4 illustre schématiquement les contours de deux faisceaux sur un écran de projection, obtenus avec le projecteur des figures 1 à 3,
  • la figure 5 est une vue schématique en perspective illustrant les trois points d'appui du miroir et l'axe optique d'un projecteur selon une deuxième forme de réalisation de l'invention,
  • la figure 6 est une vue partielle en coupe du projecteur, selon la ligne VI-VI de la figure 5,
  • la figure 7 est une vue partielle en coupe du projecteur, selon la ligne VII-VII de la figure 5,
  • la figure 8 illustre schématiquement les contours de deux faisceaux sur un écran de projection, obtenus avec le projecteur des figures 5 à 7,
  • la figure 9 est une vue schématique en perspective illustrant les trois points d'appui du miroir et l'axe optique d'un projecteur selon une troisième forme de réalisation de l'invention,
  • la figure 10 est une vue partielle en coupe du projecteur, selon la ligne X-X de la figure 9,
  • la figure 11 est une vue partielle en coupe du projecteur, selon la ligne XI-XI de la figure 9,
  • la figure 12 illustre schématiquement les contours de deux faisceaux sur un écran de projection, obtenus avec le projecteur des figures 9 à 11,
  • la figure 13 est une vue schématique en perspective illustrant les trois points d'appui des miroirs et les axes optiques de deux projecteurs, gauche et droit, selon une quatrième forme de réalisation de l'invention,
  • la figure 14 illustre schématiquement les trois points d'appui d'un miroir de projecteur selon une cinquième forme de réalisation de l'invention et les contours de deux faisceaux sur un écran de projection, obtenus avec ce projecteur,
  • la figure 15 illustre en vue de dessus le déplacement du miroir obtenu avec la forme de réalisation de la figure 14, et
  • la figure 16 illustre en vue de dessus le déplacement du miroir obtenu avec une variante de cette forme de réalisation.
    • Other aspects, aims and advantages of the present invention will appear better on reading the following detailed description of preferred embodiments thereof, given by way of example and made with reference to the appended drawings, in which:
  • FIG. 1 is a schematic perspective view illustrating the three support points of the mirror and the optical axis of a projector according to a first embodiment of the invention,
  • FIG. 2 is a partial sectional view of the projector, along line II-II of FIG. 1,
  • FIG. 3 is an enlarged view of a detail of FIG. 2,
  • FIG. 4 schematically illustrates the contours of two beams on a projection screen, obtained with the projector from FIGS. 1 to 3,
  • FIG. 5 is a schematic perspective view illustrating the three support points of the mirror and the optical axis of a projector according to a second embodiment of the invention,
  • FIG. 6 is a partial sectional view of the projector, along the line VI-VI of FIG. 5,
  • FIG. 7 is a partial view in section of the headlight, along the line VII-VII of FIG. 5,
  • FIG. 8 schematically illustrates the contours of two beams on a projection screen, obtained with the projector from FIGS. 5 to 7,
  • FIG. 9 is a schematic perspective view illustrating the three support points of the mirror and the optical axis of a projector according to a third embodiment of the invention,
  • FIG. 10 is a partial sectional view of the projector, along line XX of FIG. 9,
  • FIG. 11 is a partial sectional view of the projector, along the line XI-XI of FIG. 9,
  • FIG. 12 schematically illustrates the contours of two beams on a projection screen, obtained with the projector from FIGS. 9 to 11,
  • FIG. 13 is a schematic perspective view illustrating the three support points of the mirrors and the optical axes of two projectors, left and right, according to a fourth embodiment of the invention,
  • FIG. 14 schematically illustrates the three support points of a projector mirror according to a fifth embodiment of the invention and the contours of two beams on a projection screen, obtained with this projector,
  • FIG. 15 illustrates in top view the displacement of the mirror obtained with the embodiment of FIG. 14, and
  • FIG. 16 illustrates in top view the displacement of the mirror obtained with a variant of this embodiment.

    • On notera préliminairement que, d'une forme de réalisation à l'autre, des éléments ou parties identiques ou similaires sont désignés dans la mesure du possible par les mêmes signes de référence, et ne seront pas décrits à nouveau à chaque fois.It will be noted at the outset that, from a form of realization to the other, identical elements or parts or similar are designated as far as possible by same reference signs, and will not be described in new every time.

    En référence tout d'abord aux figures 1 à 3, on a représenté un projecteur qui comprend, dans un boítier 30 fermé par une glace (non représentée), un miroir 20 dans lequel est montée une lampe 10.Referring first to Figures 1 to 3, we have shown a projector which comprises, in a housing 30 closed by a glass (not shown), a mirror 20 in which is mounted a lamp 10.

    La lampe, à filament ou à arc, définit une source lumineuse unique.The filament or arc lamp defines a source unique light.

    Le miroir est monté, de façon conventionnelle en soi, sur trois points d'appui disposés aux trois sommets d'un triangle rectangle, de façon à autoriser la modification de l'orientation du faisceau en site (verticalement) et en azimut (horizontalement). On appelle ici "point" d'appui par exemple un montage localisé d'une partie arrière du miroir, sur une tête formant rotule reliée au boítier du projecteur.The mirror is mounted, conventionally per se, on three support points arranged at the three vertices of a right triangle, in order to authorize the modification of the orientation of the beam in elevation (vertically) and in azimuth (horizontally). We call here "point" of support by example a localized mounting of a rear part of the mirror, on a head forming a ball joint connected to the housing of the projector.

    A cet effet, on trouve un point d'appui fixe, noté PF, un point d'appui mobile H situé à la même hauteur que le point d'appui fixe PF et qui, lorsqu'il est translaté selon une direction essentiellement parallèle à l'axe optique xx du miroir, assure le réglage en azimut du faisceau., et enfin un point d'appui mobile V situé à l'aplomb du point fixe PF et qui, lorsqu'il est translaté selon une direction essentiellement parallèle audit axe optique xx, assure le réglage en site du faisceau.For this purpose, there is a fixed support point, noted PF, a mobile support point H located at the same height as the fixed support point PF and which, when translated according to a direction essentially parallel to the optical axis xx of the mirror, ensures the azimuth adjustment of the beam., and finally a mobile support point V located directly above the fixed point PF and which, when translated in one direction essentially parallel to said optical axis xx, ensures the beam elevation adjustment.

    Le projecteur comporte en outre divers moyens pour déplacer les deux points d'appui mobile afin de modifier l'orientation du faisceau, à savoir :

    • un dispositif de correction manuelle, noté CM, connu en soi et destiné à être manipulé à la main pour donner au faisceau engendré par le miroir une position de référence, ou position zéro, en ayant recours à une instrumentation optique de calibration amenée en face du projecteur alors que le véhicule repose sur un sol horizontal plan; ce réglage manuel est en général un réglage en azimut: et le cas échéant en site;
    • un dispositif dit de correction dynamique, noté CD, également connu en soi et destiné à être commandé de façon automatique en fonction des variations d'assiette du véhicule, par exemple sur la base de signaux fournis par des capteurs au niveau des essieux, pour ajuster la hauteur du faisceau en fonction de la charge du véhicule et/ou des changements d'assiette dûs à l'état de la route;
    • enfin un dispositif de commutation "croisement-route", noté CR, destiné à faire passer le miroir d'une première position, dans laquelle il engendre un faisceau de croisement convenablement positionné en site, c'est-à-dire en général avec orientation de l'axe de référence du miroir inclinée vers le bas de 1%, à une seconde position, dans laquelle le miroir est relevé pour que le faisceau engendré par le miroir, qui dans l'absolu est inchangé, puisse être utilisé comme faisceau de route, le cas échéant avec un faisceau complémentaire comme on le décrira en détail plus loin, et vice-versa.
    The projector also comprises various means for moving the two mobile support points in order to modify the orientation of the beam, namely:
    • a manual correction device, denoted CM, known per se and intended to be manipulated by hand to give the beam generated by the mirror a reference position, or zero position, by using optical calibration instrumentation brought in front of the headlamp while the vehicle is on level horizontal ground; this manual adjustment is generally an azimuth adjustment: and if necessary in elevation;
    • a so-called dynamic correction device, denoted CD, also known per se and intended to be controlled automatically as a function of variations in the attitude of the vehicle, for example on the basis of signals supplied by sensors at the axles, for adjusting the height of the beam as a function of the vehicle load and / or of the attitude changes due to the road condition;
    • finally a "crossing-road" switching device, denoted CR, intended to pass the mirror from a first position, in which it generates a passing beam suitably positioned in elevation, that is to say in general with orientation from the reference axis of the mirror inclined downwards by 1%, to a second position, in which the mirror is raised so that the beam generated by the mirror, which in absolute terms is unchanged, can be used as a beam of route, if necessary with a complementary beam as will be described in detail later, and vice-versa.

    Dans cette forme de réalisation, les dispositifs CD et CR interviennent tous deux au point V, et il est prévu deux dispositifs de correction manuelle CM intervenant au point H et au point V, respectivement.In this embodiment, the devices CD and CR both intervene at point V, and there are two manual correction devices CM intervening at point H and at point V, respectively.

    Ainsi les dispositifs de correction manuelle permettent un réglage de référence aussi bien en site qu'en azimut.Thus the manual correction devices allow a reference setting both in elevation and in azimuth.

    Le dispositif CD permet classiquement un réglage dynamique en site, tandis que le dispositif CR, en agissant au point d'appui V, permet d'engendrer sélectivement le faisceau F1 ou le faisceau F2 illustrés sur la figure 4. The CD device conventionally allows adjustment dynamic on site, while the CR device, by acting at the fulcrum V, selectively generates the beam F1 or beam F2 illustrated in FIG. 4.

    On observera ici que le faisceau F1 est un faisceau conventionnel à coupure dite en "V", conformément aux règlements européens en la matière.We will observe here that the beam F1 is a beam conventional "V" cut, in accordance with European regulations in this area.

    De façon avantageuse, le miroir 20 est conçu pour pouvoir engendrer ce type de faisceau coupé sans recourir à une coupelle d'occultation, et l'homme de l'art se réfèrera aux brevets antérieurs au nom de la demanderesse sur ce sujet.Advantageously, the mirror 20 is designed to ability to generate this type of cut beam without resorting to a concealment cup, and those skilled in the art will refer to earlier patents in the name of the plaintiff on this topic.

    Par ailleurs, il est préférable que le miroir 20 soit conçu, comme également décrit dans les brevets précités, pour engendrer un faisceau ayant la largeur requise sans le recours à des prismes ou à des stries d'étalement sur la glace de fermeture. Cette glace peut donc être lisse ou très faiblement déviatrice.Furthermore, it is preferable that the mirror 20 is designed, as also described in the aforementioned patents, to generate a beam having the required width without the using prisms or spreading streaks on the closing glass. This ice can therefore be smooth or very slightly deviating.

    De cette manière, lorsque le faisceau est déplacé de la position "croisement" (F1) à la position "route" (F2), la glace restant quant à elle immobile, on évite les phénomènes de perturbation qui seraient engendrés si de tels prismes ou stries étaient prévus.In this way, when the beam is moved from the position "crossing" (F1) to position "road" (F2), the ice remaining immobile, we avoid phenomena of disturbance that would be caused if such prisms or streaks were expected.

    Dans cette forme de réalisation, le faisceau F2 est simplement relevé verticalement par rapport au faisceau F1, pour ainsi éclairer la route à plus grande distance devant le véhicule. Si nécessaire, on peut compléter le faisceau F2 par un faisceau F3 moins large et concentré sur l'axe de la route. Ce faisceau additionnel peut être réalisé avec un deuxième projecteur. Mais compte-tenu du fait que la quantité de lumière qu'il a à fournir est très sensiblement réduite par rapport à un projecteur de route classique, il peut être de dimensions tant horizontale que verticale extrêmement réduite, et ne pas encombrer l'avant du véhicule.In this embodiment, the beam F2 is simply raised vertically with respect to the beam F1, to illuminate the road at a greater distance in front the vehicle. If necessary, the beam F2 can be completed by a narrower beam F3 and concentrated on the axis of the road. This additional beam can be realized with a second projector. But given the fact that the amount of light it has to provide is very noticeably reduced compared to a conventional road projector, it can be both horizontal and vertical extremely small, and does not clutter the front of the vehicle.

    A titre d'exemple, on peut utiliser un projecteur complémentaire ayant une hauteur et une largeur de quelques centimètres à une dizaine de centimètres.For example, you can use a projector complementary having a height and a width of a few centimeters to ten centimeters.

    La figure 3 illustre schématiquement un exemple de réalisation de la combinaison des dispositifs CM, CD et CR au point d'appui V. Il comprend un unique actionneur linéaire 55 à positions multiples pour les fonctions des dispositifs CD et CR, qui commande la translation dune tige 51 dont l'extrémité avant est filetée en 51a. Par commande électronique appropriée de l'actionneur linéaire 55, on assure simultanément le passage de faisceau de croisement à faisceau de route et réciproquement et, dans le mode de croisement, la fonction de correction dynamique en fonction des variations d'assiette.Figure 3 schematically illustrates an example of realization of the combination of CM, CD and CR devices at the fulcrum V. It includes a single actuator linear 55 with multiple positions for the functions of CD and CR devices, which control the translation of a rod 51, the front end of which is threaded at 51a. By order linear actuator 55 simultaneously ensures the passing of the passing beam at driving beam and vice versa and, in the mode of crossover, the dynamic correction function based variations in attitude.

    Le correcteur manuel CM situé au point V comprend un bouton de commande 54 attaquant un jeu de pignons 53 qui fait tourner la tige 51, celle-ci présentant à ce niveau une section par exemple carrée, et pouvant coulisser axialement par rapport au pignon avec lequel elle est en prise. La partie filetée 51a est en prise avec une pièce 52 emprisonnée dans une cage 21 ménagée à l'arrière du miroir 20 et formant simultanément rotule et écrou pour ladite partie filetée. De cette manière, on peut donner à la tige filetée 51 et au miroir une position mutuelle de référence, la correction dynamique et la commutation croisement-route s'effectuant à partir de cette référence.The manual corrector CM located at point V includes a control button 54 driving a set of sprockets 53 which rotates the rod 51, the latter having at this level a section for example square, and being able to slide axially relative to the pinion with which it is engaged. The threaded part 51a is engaged with a part 52 trapped in a cage 21 provided at the rear of the mirror 20 and simultaneously forming a ball and nut for said threaded part. In this way, we can give the stem threaded 51 and in the mirror a mutual reference position, dynamic correction and crossing-road switching based on this reference.

    En référence maintenant aux figures 5 à 7, on a représenté un projecteur comportant :

    • au point d'appui fixe PF, un premier élément du dispositif de commutation croisement-route CR;
    • au point d'appui mobile V, un dispositif de correction dynamique CD et le second élément du dispositif de commutation croisement-route CR; et
    • au point d'appui mobile H, un dispositif de correction manuelle CM.
    Referring now to Figures 5 to 7, there is shown a headlamp comprising:
    • at the fixed support point PF, a first element of the crossing-road switching device CR;
    • at the mobile support point V, a dynamic correction device CD and the second element of the crossing-road switching device CR; and
    • at the mobile support point H, a manual correction device CM.

    Dans cette réalisation, la correction manuelle ne concerne donc que le réglage de référence du faisceau en azimut.In this embodiment, manual correction does not therefore concerns that the beam reference setting in azimuth.

    La correction dynamique en site s'effectue ici encore, de façon classique, au point V.The dynamic correction on site is done here again, conventionally, at point V.

    En revanche, la commutation croisement-route s'effectue en deux points, PF et V, de manière à obtenir, pour passer du faisceau de croisement F1 au faisceau de route F2, la combinaison d'un déplacement vers le haut et d'un déplacement latéral, comme le montre la figure 8.On the other hand, the crossing-road switching takes place at two points, PF and V, so as to obtain, to pass from the passing beam F1 to the driving beam F2, the combination of upward movement and lateral displacement, as shown in figure 8.

    Plus précisément, l'angle de relèvement du faisceau est choisi de manière à assurer un éclairage de la route dans le lointain, avec une intensité suffisante (typiquement un relèvement de 1,5%), tandis que l'angle de décalage latéral est choisi de manière à centrer la tache de concentration du faisceau de croisement F1 dans l'axe de la route. Il faut savoir en effet qu'un faisceau de croisement classique possède une tache de concentration qui est décentrée vers le bas-côté de la route, de manière à privilégier l'éclairement de ce bas-côté, et le décalage a pour objet de ramener cette tache de concentration dans l'axe. La valeur de ce déplacement angulaire, qui s'effectue donc vers la gauche pour un sens de circulation à droite, est par exemple de 3%.More specifically, the beam raising angle is chosen so as to provide road lighting in the distant, with sufficient intensity (typically a 1.5% increase), while the lateral shift angle is chosen so as to center the spot of concentration of the passing beam F1 in the center line of the road. It is necessary know indeed that a classic passing beam has a spot of concentration which is offset towards the side of the road, so as to favor lighting of this aisle, and the purpose of the offset is to bring this spot of concentration in the axis. The value of this angular displacement, which therefore takes place to the left for a right-hand traffic direction, is for example 3%.

    Concrètement, ceci est réalisé en utilisant les dispositifs de commutation CR pour qu'ils provoquent deux valeurs de translation différentes des points d'appui PF et V, avec une valeur plus importante au point V. La translation au point PF donne la composante latérale du déplacement, et la différence entre les translations aux points PF et V donne la composante verticale du déplacement.Concretely, this is achieved using the CR switching devices so that they cause two different translation values of the support points PF and V, with a larger value at point V. The translation at point PF gives the lateral component of the displacement, and the difference between translations at points PF and V gives the vertical component of the displacement.

    On comprend ici que ce qu'on appelle le "point fixe" PF n'est pas fixe à proprement parler dans cette réalisation, puisqu'il se déplace lors de la commutation croisement-route. On continue toutefois à l'appeler ainsi car il tient bien lieu de point fixe lors des corrections manuelle et dynamique dans l'une ou l'autre des deux positions.We understand here that what is called the "fixed point" PF is not strictly speaking in this realization, since it moves during the crossing-road switching. However, we continue to call it because it holds instead of fixed point during manual corrections and dynamic in either of the two positions.

    En référence maintenant aux figures 9 à 12, on a représenté un projecteur qui se distingue des précédents, tout d'abord, par le fait que le triangle rectangle des points d'appui est inversé, le point V se trouvant ici au-dessus du point PF, les points PF et H étant permutés et le triangle étant rectangle au point PF.Referring now to Figures 9 to 12, we have depicted a projector that differs from the previous ones, first of all, by the fact that the right triangle of support points are reversed, the point V being here above from point PF, points PF and H being swapped and the triangle being rectangle at point PF.

    On trouve :

    • au point d'appui PF, le dispositif de commutation croisement-route CR;
    • au point d'appui H, un premier dispositif de correction manuelle CM; et
    • au point d'appui V, un second dispositif de correction manuelle CM ainsi que le dispositif de correction dynamique CD.
    We find :
    • at the point of support PF, the crossing-road switching device CR;
    • at the fulcrum H, a first manual correction device CM; and
    • at the fulcrum V, a second manual correction device CM as well as the dynamic correction device CD.

    Les deux dispositifs de correction manuelle permettent un réglage de référence du faisceau aussi bien en site (action au point V) qu'en azimut (action au point H).The two manual correction devices allow beam reference adjustment both on site (action at point V) only in azimuth (action at point H).

    Le dispositif de correction dynamique agit, conventionnellement, au point V.The dynamic correction device acts, conventionally, in point V.

    Le dispositif de commutation croisement-route est remarquable dans cette forme de réalisation en ce qu'il agit en un point unique, à savoir le point fixe PF, pour faire tourner le miroir autour d'un axe passant par la diagonale du triangle rectangle, qui joint les points mobiles H et V.The crossing-road switching device is remarkable in this embodiment in that it acts at a single point, namely the fixed point PF, to make turn the mirror around an axis passing through the diagonal of the right triangle, which joins the moving points H and V.

    De la sorte, on réalise simultanément le décalage vers le haut et latéral du faisceau de croisement F1 pour former le faisceau de route F2.In this way, the shift towards the top and side of the passing beam F1 to form the driving beam F2.

    Plus précisément, si l'angle de l'hypothénuse HV par rapport à l'horizontale est noté α, alors l'angle de la direction de déplacement du faisceau dans le plan de projection sera de cette même valeur α, mais par rapport à la verticale (voir figure 12).Specifically, if the angle of the HV hypotenuse by relation to the horizontal is noted α, then the angle of the direction of movement of the beam in the plane of projection will be of the same value α, but relative to vertical (see Figure 12).

    Ainsi, on choisit l'emplacement des trois points PF, H et V à l'arrière du miroir de manière à obtenir l'obliquité de déplacement souhaitée.Thus, we choose the location of the three points PF, H and V at the back of the mirror so as to obtain the obliquity desired displacement.

    Grâce à cette forme de réalisation, on peut réaliser la commutation croisement-route avec un dispositif CR unique.Thanks to this embodiment, the Crossover-road switching with a single CR device.

    En référence maintenant à la figure 13, on a représenté l'agencement de correcteurs/commutateurs croisement-route sur les projecteurs gauche et droit d'un véhicule.Referring now to Figure 13, there is shown the arrangement of crossover / correctors / switches on the left and right headlights of a vehicle.

    Le projecteur gauche possède un axe optique xGxG et trois points d'appui PFG, HG et VG. Le projecteur droit possède un axe optique xDxD et trois points d'appui PFD, HD et VD. Comme on peut le voir, les deux triangles rectangles dont les points d'appui respectifs définissent les sommets sont symétriques par rapport à un plan vertical médian du véhicule.The left projector has an optical axis x G x G and three support points PF G , H G and V G. The right headlamp has an optical axis x D x D and three support points PF D , H D and V D. As can be seen, the two right triangles whose respective support points define the vertices are symmetrical with respect to a median vertical plane of the vehicle.

    En outre, on prévoit dans cette réalisation :

    • aux points d'appui fixes PFG, PFD, respectivement des dispositifs de correction manuelle,
    • aux points d'appui HG, HD, respectivement des premiers éléments de dispositif de commutation croisement/route CR, et
    • aux points d'appui VG, VD, respectivement des seconds éléments de dispositif de commutation croisement/route CR et des dispositifs de correction dynamique CD.
    In addition, provision is made in this embodiment:
    • at fixed support points PF G , PF D , respectively manual correction devices,
    • at the support points H G , H D , respectively of the first elements of the crossing / road switching device CR, and
    • at the support points V G , V D , respectively of the second elements of the crossing / road switching device CR and of the dynamic correction devices CD.

    Pour que le décalage des faisceaux de croisement en vue de former les faisceaux de route soit identique dans les deux cas, on comprend que les dispositifs de commutation CR situés aux points VG, VD doivent agir dans le même sens, tandis que les correcteurs CR situés aux points HG, HD doivent agir dans des sens opposés.So that the offset of the passing beams in order to form the driving beams is identical in the two cases, it is understood that the switching devices CR located at the points V G , V D must act in the same direction, while the correctors CR located at points H G , H D must act in opposite directions.

    En référence maintenant aux figures 14 à 16, on a représenté une autre variante de réalisation de l'invention.Referring now to Figures 14 to 16, we have shown another alternative embodiment of the invention.

    La figure 14 montre en partie inférieure trois points d'appui PF, H et V, avec deux éléments du dispositif de commutation croisement-route CR prévus respectivement aux points H et V.Figure 14 shows three dots at the bottom support PF, H and V, with two elements of the CR-crossover switching provided respectively for points H and V.

    Dans cette forme de réalisation, comme illustré sur la figure 15, la course de déplacement D de l'élément de commutation CR placé au point d'appui H doit être importante, en pouvant atteindre dans certains cas 20 mm. Ceci implique une possibilité de débattement important du miroir 20 dans le boítier 30, et donc un surdimensionnement du boítier.In this embodiment, as illustrated in the Figure 15, the displacement stroke D of the element of CR switch placed at support point H must be important, being able to reach in some cases 20 mm. This implies a possibility of significant movement of the mirror 20 in the housing 30, and therefore an oversizing of the case.

    Pour atténuer ce problème, cette variante prévoit de réaliser la commutation croisement-route en ajoutant un troisième élément CR' au point d'appui PF, et en donnant aux déplacements de commutation aux points PF et H des directions inverses mais de même amplitude, à savoir une amplitude D/2 égale à la moitié de celle nécessaire au point H dans la forme de réalisation de la figure 14.To alleviate this problem, this variant provides carry out the crossing-road switching by adding a third element CR 'at the point of support PF, and giving the switching movements at points PF and H of reverse directions but of the same amplitude, namely a amplitude D / 2 equal to half that required at the point H in the embodiment of Figure 14.

    De la sorte, et comme illustré sur la figure 16, il en résulte que l'amplitude de déplacement aux points d'appui concernés est réduite, et le surdimensionnement du boítier est moins important.In this way, and as illustrated in FIG. 16, it results in the amplitude of displacement at the support points affected is reduced, and the oversizing of the case is less important.

    On va donner ci-dessous des explications supplémentaires valables pour toutes les formes de réalisation où un dispositif de correction dynamique CD et un élément de commutation croisement-route CR interviennent sur le même point d'appui, en prenant comme exemple le cas où cette combinaison, notée CD+CR1, intervient au point d'appui V, tandis que le point d'appui H dispose d'un autre élément de commutation croisement-route CR2 au point H.We will give explanations below additional valid for all forms of realization where a dynamic correction device CD and a crossing-road switching element CR intervene on the same point of support, taking as an example the case where this combination, denoted CD + CR1, occurs at the point support V, while support point H has another CR2 crossing-road switching element at point H.

    Typiquement, le course du correcteur dynamique est de 8 mm. La course du commutateur CR1 sera par exemple de 4 mm, tandis que la course du commutateur CR2 sera de 3 mm.Typically, the dynamic corrector stroke is 8 mm. The travel of the switch CR1 will for example be 4 mm, while the travel of the CR2 switch will be 3 mm.

    Au passage de faisceau de croisement en faisceau de route, effectué conventionnellement sur le commodo du véhicule, un calculateur électronique est adapté pour :

    • déconnecter obligatoirement les informations de correction dynamique fournies par les capteurs d'assiette du véhicule; le calculateur ne délivre alors au dispositif CD qu'une information statique, pour le figer dans la position à laquelle il se trouve; en effet, la correction dynamique d'assiette dans le mode route n'est pas obligatoire;
    • expédier obligatoirement à l'élément CR1 l'information de déplacement sur 4 mm, et à l'élément CR2 l'information de déplacement sur 3 mm, pour ainsi effectuer à proprement-parler le passage de faisceau de croisement (F1 par exemple sur la figure 8) à faisceau de route (F2 sur cette même figure);
    • le cas échéant, si un projecteur complémentaire est prévu pour la position route (faisceau F3), allumer la lampe de celui-ci; et
    • enfin, dans le cas où la lampe est complétée par un occulteur de faisceau de croisement, formant notamment cache de lumière directe ou encore coupelle d'occultation (du type de celui du filament antérieur d'une lampe normalisée H4) en coopération avec un miroir parabolique, escamoter cet occulteur pour accroítre le flux lumineux.
    When passing from the driving beam to the driving beam, conventionally carried out on the vehicle's commodo, an electronic computer is suitable for:
    • necessarily disconnect the dynamic correction information provided by the attitude sensors of the vehicle; the computer then delivers to the device CD only static information, to freeze it in the position at which it is located; in fact, the dynamic attitude correction in the road mode is not compulsory;
    • obligatorily send to the element CR1 the information of displacement on 4 mm, and to the element CR2 the information of displacement on 3 mm, to thus carry out strictly speaking the passage of passing beam (F1 for example on the Figure 8) main beam (F2 in this same figure);
    • if necessary, if an additional headlamp is provided for the road position (harness F3), switch on the lamp; and
    • finally, in the case where the lamp is completed by a passing beam concealer, in particular forming a cache of direct light or an obscuring cup (of the type of that of the anterior filament of a H4 standard lamp) in cooperation with a mirror parabolic, retract this blackout to increase the luminous flux.

    Naturellement, ces opérations sont effectuées simultanément, et les opérations inverses sont effectuées pour le retour de faisceau de route à faisceau de croisement.Naturally, these operations are carried out simultaneously, and the reverse operations are performed for driving beam return to beam crossing.

    On observera que la combinaison des deux premières opérations décrites ci-dessus permet d'éviter de recourir à une platine séparée pour le montage des dispositifs CD et CR1, qui peuvent être tous deux montés directement sur le boítier et partager le même moteur électrique.We will observe that the combination of the first two operations described above avoids resorting to a separate plate for mounting CD devices and CR1, which can both be mounted directly on the housing and share the same electric motor.

    En revanche, lorsqu'un dispositif de correction manuelle CM et un dispositif de correction dynamique CD sont prévus au même point d'appui, il est nécessaire de fixer le dispositif CM sur le boítier, et de fixer le dispositif CD sur une platine mobile déplacée par le correcteur CM.On the other hand, when a correction device manual CM and a dynamic correction device CD are provided at the same fulcrum, it is necessary to fix the CM device on the case, and fix the CD device on a mobile stage moved by the CM corrector.

    Sur le plan pratique, les éléments de commutation croisement-route, dont la fonction est celle d'actionneurs linéaires à deux positions discrètes, peuvent être constitués par des électro-aimants à deux positions, par des moteurs à couple bloqué ou encore par des moteurs pas à pas.On a practical level, the switching elements road-crossing, whose function is that of actuators linear with two discrete positions, can be constituted by two-position electromagnets, by torque-locked motors or by stepper motors.

    Enfin on observera que le principe de déplacement de faisceau de croisement pour former un faisceau de route conformément à la présente invention peut être également implémenté dans des projecteurs où le montage du miroir sur le boítier s'effectue par des moyens autres qu'un triplet de points d'appui.Finally we will observe that the principle of displacement of passing beam to form a driving beam according to the present invention can also be implemented in projectors where mounting the mirror on the case is carried out by means other than a triplet of support points.

    Claims (17)

    1. Motor vehicle headlight, comprising a single light source (10), a single mirror (20) receiving the lamp and mounted on three support points (PF, H, V) disposed at the three vertices of a triangle, and movement means controlled so as to selectively move in translation at least one of the support points into one from amongst a set limited to two discrete positions, namely a first position corresponding to a dipped beam (F1) and a second position (F2), raised, corresponding to a main beam, characterised in that the movement means comprise a single movement member (CR) acting at a single support point (V; PF).
    2. Headlight according to Claim 1, characterised in that it comprises a member (CR) for moving in translation a support point (V) situated vertically in line with a fixed point (PF).
    3. Headlight according to Claim 2, characterised in that it further comprises at the said support point (V) situated vertically in line with the fixed point (PF), at least one device (CM, CD) for correcting the orientation of the beam with respect to elevation.
    4. Headlight according to Claim 3, characterised in that the said correction device is a manual device (CM).
    5. Headlight according to Claim 3 or 4, characterised in that said correction device is a device for dynamic correction (CD) according to the variations in attitude of the vehicle.
    6. Headlight according to Claim 1, characterised in that the single movement member (CR) is able to raise the beam and to shift it laterally in the opposite direction to the road verge.
    7. Headlight according to Claim 6, characterised in that the single movement member (CR) is situated at a support point (PF) opposite to one side (HV) of the triangle which is oblique with respect to the horizontal and with respect to the vertical.
    8. Headlight according to Claim 7, characterised in that it also comprises a device for dynamic correction (CD) according to variations in attitude of the vehicle, provided at a support point (V) situated vertically in line with the said support point (PF) opposite to an oblique side of the triangle.
    9. Headlight according to one of Claims 7 and 8, characterised in that it also comprises at least one manual beam correction device (CM) situated at a support point (H, V) different from the said support point (PF) opposite to an oblique side of the triangle.
    10. Headlight according to one of Claims 7 to 9, characterised in that the inclination (α) of the said oblique side (HV) of the triangle with respect to the horizontal is chosen so as to be equal to the inclination of the direction of movement of the beam with respect to the vertical.
    11. Headlight according to one of Claims 6 to 10, characterised in that the ratio between the lateral shift angle of the beam and its lift angle is around 2:1.
    12. Headlight according to one of Claims 1 to 11, characterised in that it comprises a mirror (20) able to form by itself a wide dipped beam, and in that the glass is smooth or with little deviation.
    13. Headlight according to Claim 5, characterised in that the movement member (CR) and the dynamic correction device (CD) share the same motor.
    14. Headlight according to one of Claims 1 to 13, characterised in that the movement member (CR) is chosen from the group comprising two-position electromagnets, locked-torque motors and stepping motors.
    15. Headlight according to one of Claims 1 to 14, characterised in that it also comprises means (CD) for making a dynamic correction to the orientation of the mirror according to variations in attitude of the vehicle, and means for inactivating the said means when switching to main beam.
    16. Left or right set of two motor vehicle headlights, characterised in that it comprises a first headlight according to one of Claims 1 to 15, and a second headlight of smaller size, able to be switched on when the beam emitted by the first headlight is brought into its main-beam position (F2).
    17. Set of two left and right motor vehicle headlights, characterised in that it comprises two headlights according to one of Claims 1 to 15, in that the support points (PFG, HG, VG) of a headlight are disposed symmetrically with the support points (PFD, HD, VD) of the other headlight with respect to a vertical mid-plane of the vehicle, and in that the member (CR) for moving in translation a support point (HG) of one of the headlights and the member (CR) for moving in translation a homologous support point (HD) of the other headlight act in opposite directions with respect to each other.
    EP97400367A 1996-02-20 1997-02-19 Vehicle headlight with a single light source for dipped and distance light Expired - Lifetime EP0791780B1 (en)

    Applications Claiming Priority (2)

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    FR9602061A FR2745061B1 (en) 1996-02-20 1996-02-20 MOTOR VEHICLE HEADLIGHT COMPRISING A SINGLE LIGHT SOURCE CAPABLE OF EMITTING A CROSSING BEAM AND A ROAD BEAM
    FR9602061 1996-02-20

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    EP0791780A1 EP0791780A1 (en) 1997-08-27
    EP0791780B1 true EP0791780B1 (en) 2001-12-19

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    EP (1) EP0791780B1 (en)
    JP (1) JPH09315211A (en)
    DE (1) DE69709200T2 (en)
    ES (1) ES2170343T3 (en)
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    Also Published As

    Publication number Publication date
    EP0791780A1 (en) 1997-08-27
    ES2170343T3 (en) 2002-08-01
    DE69709200D1 (en) 2002-01-31
    JPH09315211A (en) 1997-12-09
    FR2745061A1 (en) 1997-08-22
    DE69709200T2 (en) 2002-08-22
    US6238071B1 (en) 2001-05-29
    FR2745061B1 (en) 1998-05-07

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