EP0256930A1 - Nebelscheinwerfer für Kraftfahrzeuge mit einer Transversalwendel - Google Patents

Nebelscheinwerfer für Kraftfahrzeuge mit einer Transversalwendel Download PDF

Info

Publication number
EP0256930A1
EP0256930A1 EP87401810A EP87401810A EP0256930A1 EP 0256930 A1 EP0256930 A1 EP 0256930A1 EP 87401810 A EP87401810 A EP 87401810A EP 87401810 A EP87401810 A EP 87401810A EP 0256930 A1 EP0256930 A1 EP 0256930A1
Authority
EP
European Patent Office
Prior art keywords
filament
reflector
axis
horizontal
projector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87401810A
Other languages
English (en)
French (fr)
Other versions
EP0256930B1 (de
Inventor
Bernard Luciani
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.)
Valeo Vision SAS
Original Assignee
Cibie Projecteurs SA
Valeo Vision 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 Cibie Projecteurs SA, Valeo Vision SAS filed Critical Cibie Projecteurs SA
Publication of EP0256930A1 publication Critical patent/EP0256930A1/de
Application granted granted Critical
Publication of EP0256930B1 publication Critical patent/EP0256930B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/323—Optical layout thereof the reflector having two perpendicular cross sections having regular geometrical curves of a distinct nature
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17—Discharge light sources
    • F21S41/173—Fluorescent light sources

Definitions

  • the present invention relates to a headlight for a motor vehicle, making it possible to fulfill the fog light function.
  • the beam corresponding to such an illumination is a short-range beam, limited upwards by a substantially horizontal cutting plane, very spread out laterally and comprising no rising rays capable of giving rise to undesirable optical phenomena with the droplets of water in mist suspension.
  • the fog lights of the prior art mostly have an axially oriented filament, that is to say in the axis of the projector.
  • the first consists of providing a reflector in the form of a paraboloid of revolution, the focus of which is located at the front end of the filament (in the direction of emission). A slightly divergent beam is thus obtained, the spokes of the upper half of which are folded down by means of deflecting elements provided on the closing glass.
  • the reflector has a surface discontinuity at the point of connection between the two half-paraboloids: these, focused at different points, necessarily have either different vertices, either different focal distances, and consequently have different profiles along a connection plane; because of this characteristic, a reflector manufactured according to these teachings is, in practice, imperfect at the connection, which results in an emission of parasitic light rays above the cut.
  • the beam generated by the lower half-paraboloid is spread laterally in a satisfactory manner only in the zone situated just below the cut. This non-uniform spreading of the beam goes against the aim sought in a fog beam, which is to obtain a relatively uniform lateral spreading.
  • an axial filament with a reflector of this type necessarily causes the appearance of filament images which are large and oriented vertically, or with a slight inclination relative to the vertical. Such images must be subject to significant lateral spreading, and this must be done on the closing glass with appropriate prisms or streaks.
  • a second disadvantage of this type of projector is that, still due to the existence of these vertical images, the beam has a greater thickness than that which is required in practice, the lower part of it not contributing to comfort. visual, and can even be annoying by lighting the road too close to the vehicle.
  • fog lamps comprising a horizontal filament lamp transverse to the axis of the projector, associated with a reflector in the form of a paraboloid of revolution, the focus of which is located in the center of the filament.
  • the beam does not contain large images of the filament, but it remains necessary to effect, by prisms formed on the closing glass, a folding of the images in the vertical direction, with a risk of emission of parasitic rays. up at the spoils of these prisms.
  • the present invention aims to overcome the drawbacks of the prior art and to propose a fog light in which none, or essentially no vertical deflection of the light rays has to be carried out by the closing glass, and in which the beam obtained is of 'a good homogeneity in its width as in its height.
  • the invention relates to a fog light for a motor vehicle, of the type comprising a transverse horizontal filament lamp, a reflector the axis of which passes directly above the center of the filament, and a closing window, characterized in that that the surface of the reflector is a surface without discontinuity forming images of the filament, all the points of which are situated below a horizontal cut and in a horizontal strip of essentially constant height situated under said cut.
  • the fog lamp of the invention shown diagrammatically in FIGS. 2 and 3, comprises a lamp (not shown) provided with a filament 10, a reflector 20 and a distribution glass 30 closing the projector.
  • the filament is arranged in a horizontal plane and oriented transversely to the axis Ox of the reflector, more precisely, in the present example, the filament, modeled in the form of a cylinder of length 2 l and of radius r, is shifted towards the top with respect to the horizontal plane xOy by a distance equal to its radius, so that its emissive surface is tangent to said plane. It is also arranged, in the direction y ⁇ Oy, so that its center is perpendicular to a point F0 located on the axis Ox. The distance from the top of the reflector to this point F0 is noted f0.
  • the position of the filament may vary slightly from the position indicated above, without departing from the scope of the invention.
  • the surface of the reflector is a surface without discontinuity, chosen so as to form the images of the filament, all the points of which are situated below a horizontal cut passing through the axis of the projector (denoted h ⁇ Hh in FIGS. 4a, 4b, and 5), and in a horizontal strip of essentially constant height delimited at the top by said cut.
  • all of these images have their highest point situated on the cut, or in the very close vicinity thereof.
  • absence of discontinuity is meant continuity guaranteed at the first order at any point on the surface of the reflector, and at the second order at any point on the surface with the exception of two localized defects as explained below, manifested by very slight breaks in the curve.
  • a second order continuity means that at any point of a line drawn on the surface, the tangent planes are the same on both sides of this line.
  • FIG. 1 represents the distribution of the images for a reflector projector with a complex surface without discontinuity associated with an axial filament.
  • the distribution of the images below the cut, in particular in the horizontal direction is here of very good uniformity, more precisely, it can be observed that the images of the filament, progressively that they rotate around their center from horizontal to vertical, see their length progressively reduced.
  • FIG. 5 which represents, by a series of isocandela curves C of decreasing values from the inside towards the outside, the illumination provided by the whole of the reflector, one can observe the sharpness of the upper horizontal cutout h ⁇ Hh, the large width of the beam with a practically constant thickness, and the concentration point P located below the cut h ⁇ Hh and centered on the vertical v ⁇ Hv.
  • the closing glass can optionally provide additional lateral spreading of the beam.
  • additional lateral spreading of the beam is already obtained by the very nature of the reflector, and there will be no need to provide significant extra thicknesses on the closing glass: it will therefore be easy to mold, whether made of glass or made of plastic.
  • Figure 6a shows, in schematic front view without closing glass, a projector whose reflector has a width y1 approximately equal to twice its height z1.
  • Figure 6b these proportions have been reversed, the height z2 being approximately equal to twice the width y2.
  • the luminous flux (in lumens) obtained was measured as a function of the inclination (in degrees) at which one places oneself below the cut-off.
  • FIG. 7 represents the curves ⁇ 1 and ⁇ 2 obtained respectively with the projectors of FIGS. 6a and 6b.
  • the filament is located at a distance z3 below the upper edge of the reflector, distance which is about one tenth of the total height z2 of the reflector, and in figure 8b, the filament is at a distance z4, substantially equal to z3, above the lower edge of the reflector.
  • the surfaces of the two reflectors are equal.
  • the invention can be implemented with any contours of reflectors and any filament / reflector positions in a given contour, the height of the headlamp can advantageously be increased as far as possible, to the detriment of its width, and shift the lamp upwards.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP87401810A 1986-08-04 1987-08-04 Nebelscheinwerfer für Kraftfahrzeuge mit einer Transversalwendel Expired - Lifetime EP0256930B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8611263A FR2602305B1 (fr) 1986-08-04 1986-08-04 Projecteur antibrouillard a filament transversal pour vehicule automobile
FR8611263 1986-08-04

Publications (2)

Publication Number Publication Date
EP0256930A1 true EP0256930A1 (de) 1988-02-24
EP0256930B1 EP0256930B1 (de) 1990-12-19

Family

ID=9338006

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87401810A Expired - Lifetime EP0256930B1 (de) 1986-08-04 1987-08-04 Nebelscheinwerfer für Kraftfahrzeuge mit einer Transversalwendel

Country Status (6)

Country Link
US (1) US4827367A (de)
EP (1) EP0256930B1 (de)
JP (1) JP2631980B2 (de)
DD (1) DD261400A5 (de)
DE (1) DE3766774D1 (de)
FR (1) FR2602305B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4225370B4 (de) * 1992-07-31 2004-02-05 Robert Bosch Gmbh Nebelscheinwerfer für Fahrzeuge

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2642145B1 (fr) * 1989-01-23 1993-04-09 Valeo Vision Projecteur de vehicule automobile comportant une source lumineuse unique et engendrant deux faisceaux differents
DE3930746A1 (de) * 1989-09-14 1991-03-28 Hella Kg Hueck & Co Scheinwerfer, insbesondere fuer kraftfahrzeuge
FR2664363B1 (fr) * 1990-07-03 1992-12-31 Valeo Vision Projecteur a plusieurs fonctions, en particulier pour vehicule automobile, adapte a ameliorer l'eclairement d'elements de signalisation routiere.
GB2284658B (en) * 1993-12-09 1997-07-16 Koito Mfg Co Ltd Headlamp for an automobile
EP0847894B1 (de) 1996-12-16 2003-05-02 Valeo Vision Fahrzeugscheinwerfer mit Einstelleinrichtung des Reflektors
FR2767904B1 (fr) * 1997-09-03 1999-11-26 Valeo Vision Miroir de projecteur de vehicule automobile pour virages, et projecteur l'incorporant
FR2776366B1 (fr) 1998-03-19 2000-06-30 Valeo Vision Projecteur de virage pour vehicule automobile, susceptible d'emettre des faisceaux differents
FR2769687B1 (fr) 1997-10-13 2000-03-03 Valeo Vision Ensemble de projecteurs gauche et droit de vehicule automobile, a proprietes photometriques ameliorees
FR2774150B1 (fr) 1998-01-28 2000-04-14 Valeo Vision Projecteur a source transversale pour vehicule automobile, susceptilble d'emettre un faisceau a coupure nette
FR2774149B1 (fr) 1998-01-28 2000-04-14 Valeo Vision Projecteur de vehicule automobile, comportant une source transversale et apte a engendrer un faisceau a coupure non rectiligne
FR2774151B1 (fr) 1998-01-28 2000-04-14 Valeo Vision Projecteur de vehicule automobile a source lumineuse virtuelle
FR2775057B1 (fr) 1998-02-17 2000-05-05 Valeo Vision Projecteur a source transversale pour vehicule automobile, avec un moyen d'occultation de la lumiere directe
FR2775640B1 (fr) 1998-03-04 2000-05-26 Valeo Vision Projecteur de vehicule automobile a miroir dote d'au moins une joue laterale
FR2804495B1 (fr) 2000-01-31 2002-06-07 Valeo Vision Projecteur de vehicule automobile, comportant une source transversale et apte a engendrer un faisceau a coupure non rectiligne
FR2819042B1 (fr) 2000-12-28 2003-03-14 Valeo Vision Projecteur pour vehicule, comprenant un reflecteur et une source lumineuse horizontale orientee transversalement a un axe optique du reflecteur
FR2837908B1 (fr) 2002-03-28 2004-06-11 Valeo Vision Projecteur d'eclairage equipe d'un reflecteur elliptique pivotant et d'une lentille fixe pour la realisation d'un faisceau de virage
FR2877421B1 (fr) * 2004-11-04 2007-04-13 Valeo Vision Sa Projecteur lumineux, pour vehicule automobile, donnant un faisceau a coupure
FR2883359B1 (fr) * 2005-03-15 2007-05-11 Valeo Vision Sa Projecteur lumineux pour vehicule automobile, de faible encombrement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1309130A (fr) * 1962-01-05 1962-11-09 Philips Nv Phare d'automobile
FR1319105A (fr) * 1961-04-04 1963-02-22 Philips Nv Projecteur pour véhicules à moteur
FR2536503A1 (fr) * 1982-11-19 1984-05-25 Cibie Projecteurs Projecteur antibrouillard pour vehicule automobile

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1898167A (en) 1930-05-06 1933-02-21 Ivan L Bean Reflector
US4246631A (en) * 1978-05-23 1981-01-20 Lucas Industries Limited Vehicle headlamp
US4303965A (en) * 1978-10-16 1981-12-01 Westinghouse Electric Corp. Single-mode vehicular headlamp system
US4520433A (en) * 1982-06-09 1985-05-28 General Electric Company Motor vehicle headlamp
JPS5931702U (ja) * 1982-08-24 1984-02-28 市光工業株式会社 車輌用補助灯
FR2566878B1 (fr) * 1984-06-27 1986-07-18 Cibie Projecteurs Perfectionnements aux projecteurs automobiles emettant un faisceau coupe, notamment un faisceau de croisement
DE3515493A1 (de) * 1985-04-30 1986-10-30 Robert Bosch Gmbh, 7000 Stuttgart Scheinwerfer fuer abblendlicht oder nebellicht von kraftfahrzeugen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1319105A (fr) * 1961-04-04 1963-02-22 Philips Nv Projecteur pour véhicules à moteur
FR1309130A (fr) * 1962-01-05 1962-11-09 Philips Nv Phare d'automobile
FR2536503A1 (fr) * 1982-11-19 1984-05-25 Cibie Projecteurs Projecteur antibrouillard pour vehicule automobile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4225370B4 (de) * 1992-07-31 2004-02-05 Robert Bosch Gmbh Nebelscheinwerfer für Fahrzeuge

Also Published As

Publication number Publication date
FR2602305A1 (fr) 1988-02-05
DD261400A5 (de) 1988-10-26
EP0256930B1 (de) 1990-12-19
JPS6343201A (ja) 1988-02-24
FR2602305B1 (fr) 1990-03-23
JP2631980B2 (ja) 1997-07-16
DE3766774D1 (de) 1991-01-31
US4827367A (en) 1989-05-02

Similar Documents

Publication Publication Date Title
EP0256930B1 (de) Nebelscheinwerfer für Kraftfahrzeuge mit einer Transversalwendel
EP0373065B1 (de) Scheinwerfer für ein Kraftfahrzeug, versehen mit einem komplexen Spiegel mit geänderten Zwischenzonen
EP0581679B1 (de) Kfz-Scheinwerfer mit einer Zweifaden-Glühlampe zur selektiven Erzeugung von Nebel- und Fernlicht
FR3012867A1 (fr) Element optique primaire, module lumineux et projecteur pour vehicule automobile
FR2944578A1 (fr) Module et dispositif d'eclairage pour vehicule avec fonction route amelioree
EP0250313B1 (de) Zusatzscheinwerfer für Abblendscheinwerfer von Kraftfahrzeugen
FR2769071A1 (fr) Projecteur de type elliptique a faisceau variable, notamment pour vehicule automobile
FR2536503A1 (fr) Projecteur antibrouillard pour vehicule automobile
FR2621679A1 (fr) Projecteur de route de faible hauteur a grande recuperation de flux pour vehicule automobile
EP0645578B1 (de) Scheinwerfer mit glatter Scheibe, insbesondere für Kraftfahrzeuge, und Verfahren zum Herstellen des Reflektors eines solchen Scheinwerfers
EP0684420B1 (de) Scheinwerfer mit einer Zweifadenlampe zur Erzeugung eines Abblendlicht- und eines Fernlichtbündels
FR2704044A1 (fr) Projecteur du genre elliptique pour véhicule automobile.
FR2609146A1 (fr) Projecteur de vehicule automobile comportant un reflecteur parabolique a fond modifie
EP0933585A1 (de) Kfz-Scheinwerfer mit einer querliegenden Lichtquelle und zum Erzeugen von einer scharfen Lichtbegrenzung
EP0258116B1 (de) Scheinwerfer für Abblendlicht und Fernlicht mit zwei Transversalwendeln für Kraftfahrzeuge
FR2793542A1 (fr) Projecteur du genre elliptique a deux fonctions d'eclairage pour vehicule automobile
FR2773604A1 (fr) Projecteur du genre elliptique pour vehicule automobile
FR2797029A1 (fr) Projecteur du genre elliptique pour vehicule automobile, susceptible d'engendrer un faisceau lumineux a deux fonctions
FR2808867A1 (fr) Projecteur bi-fonction a source lumineuse unique et occulteur mobile pour vehicule automobile
EP0493257A1 (de) KFZ-Scheinwerfer mit Lichtleitern
EP0736726B1 (de) Kfz-Scheinwerfer, der ein durch 2 in der Höhe versetzte Ebenen begrenztes Lichtmuster erzeugt
FR2774149A1 (fr) Projecteur de vehicule automobile, comportant une source transversale et apte a engendrer un faisceau a coupure non rectiligne
EP1096196A1 (de) Platzsparender Kraftfahrzeugsscheinwerfer, insbesondere Abblendlichtscheinwerfer
FR2751051A1 (fr) Projecteur de vehicule automobile comportant un cache de lumiere directe a bras support vertical et un miroir adapte
FR2782149A1 (fr) Projecteur de vehicule automobile pourvu d'une lampe a deux filaments et d'un miroir perfectionnes

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE IT

17P Request for examination filed

Effective date: 19880606

17Q First examination report despatched

Effective date: 19890914

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VALEO VISION

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE IT

REF Corresponds to:

Ref document number: 3766774

Country of ref document: DE

Date of ref document: 19910131

ITF It: translation for a ep patent filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050804

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20050805

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070301