EP2960573A2 - Scheinwerfer für fahrzeug mit belüftungsleitung - Google Patents

Scheinwerfer für fahrzeug mit belüftungsleitung Download PDF

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Publication number
EP2960573A2
EP2960573A2 EP15173855.6A EP15173855A EP2960573A2 EP 2960573 A2 EP2960573 A2 EP 2960573A2 EP 15173855 A EP15173855 A EP 15173855A EP 2960573 A2 EP2960573 A2 EP 2960573A2
Authority
EP
European Patent Office
Prior art keywords
housing
air
light device
wall
channeling means
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Withdrawn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
EP15173855.6A
Other languages
English (en)
French (fr)
Other versions
EP2960573A3 (de
Inventor
Christine Roucoules
Jean-Baptiste HEINE
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
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 Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP2960573A2 publication Critical patent/EP2960573A2/de
Publication of EP2960573A3 publication Critical patent/EP2960573A3/de
Withdrawn legal-status Critical Current

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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
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/30—Ventilation or drainage of lighting devices
    • F21S45/33—Ventilation or drainage of lighting devices specially adapted for headlamps

Definitions

  • the invention relates to the field of lighting and / or light signaling, more particularly to the field of lighting and / or light signaling for a motor vehicle. More particularly, the invention relates to a light device, such as a projector, for a motor vehicle.
  • the published patent document DE 196 41 915 A1 discloses a projector whose housing comprises a ventilation air inlet and an outlet of said ventilation air.
  • the outlet port is disposed at the bottom wall of the housing so as to enjoy the air flow caused by the movement of the vehicle. More precisely, this air flow is likely to be accelerated in contact with this wall and, consequently, to generate a depression by application of the Bernoulli principle.
  • the orifice is located at a front portion of the bottom wall, near the bottom of the ice, so that the flow of air thus generated flows along the inner face of the ice.
  • the air inlet port is also located on the bottom wall but at a rear portion thereof.
  • the ventilation air flow thus describes an inverted U-shaped path, that is to say along a first substantially ascending section at the rear of the housing, followed by a second generally horizontal section along the wall. top of the housing and then following a third section along the ice.
  • This ventilation air circulation device is interesting in that it exploits the wind speed generated by the movement of the vehicle. It is therefore economical and in principle reliable.
  • the phenomenon of suction of the air in the housing by acceleration of the air flow along the bottom wall of the housing remains unsatisfactory, especially at reduced speed of the vehicle, especially in the context of urban traffic.
  • the invention aims to overcome at least one drawback of the state of the art, more particularly the state of the art mentioned above. More particularly, the invention aims to provide an effective solution to the problem of ventilation of a light device.
  • the invention relates to a light device, such as a motor vehicle headlight, comprising: a housing with walls defining a volume with an opening; a mirror disposed on the opening of the housing; at least one lighting and / or light-signaling module arranged in the housing and intended for produce a light beam through the ice, along an optical axis of the device and directed forward; the housing comprising at least one ventilation opening through one of its walls; and remarkable in that it further comprises at least one means for channeling air with a guide wall connected to the orifice or one of the orifices of the wall, the channeling means emerging outside the housing and in that the or at least one of the air channeling means, is open towards the front in the direction of emission of the light beam by said device, the guide wall of the air channeling means being arranged to guide a flow of air from outside the housing to the interior of the housing, through said orifice; either opens backwards in the direction of emission of the light beam by said device, the guide wall of the air channeling means being arranged to
  • the channeling means or means open outwards in the direction of emission of the light beam, and are / are arranged in such a way as to be able to collect the dynamic pressure of an air flow. oriented along the optical axis, said dynamic pressure allowing entry and circulation of air in the volume of the housing.
  • the channeling means or means open backwards in the direction of emission of the light beam, so that an air flow along the guide wall or walls and oriented along the optical axis generates a vacuum at the outlet area of the channeling means, said depression forcing an air outlet out of the housing and a flow of air in the housing volume.
  • the device comprises at least one ducting means opening towards the front in the direction of emission of the light beam, and arranged so as to be able to collect the dynamic pressure of an air flow.
  • said dynamic pressure allowing entry and circulation of air in the volume of the housing
  • at least one channeling means opening towards the rear in the direction of emission of the light beam, so as to that an air flow along the guide wall or walls and oriented along the optical axis generates a depression in the emerging zone duct, said depression forcing an air outlet out of the housing and a flow of air in the volume of the housing, said ducting means being arranged to respectively generate an inlet and an outlet of air near the ice .
  • the outer and / or inner surface of the guiding wall of said one or more air channeling means describes a curved surface, for example in the form of a quarter sphere, preferably with a variation of angle between 60 ° and 120 °, more preferably between 70 ° and 110 °, more preferably between 80 ° and 100 °.
  • the guiding wall of the or at least one of the air channeling means comprises an outer surface, this outer surface being convex from the outside of the one or more channelization means. the air and in a direction from the front of the light device to its rear, the curvature of this outer surface extending to the point where the guide means opens.
  • the cross section of the outer surface and / or the passage of the channeling means or at least one of the channeling means is preferably in a semicircle and more preferably circular.
  • the orifices connected to the channeling means are arranged on a portion of the housing corresponding to the front half of said housing, preferably to a quarter front of said housing.
  • the orifices connected to the channeling means are arranged on a lower wall of the housing.
  • the bottom wall is concave outside the housing, the air channeling means being arranged to open up or behind the top of this concavity.
  • the device comprises an auxiliary guide wall extending at a distance from the bottom wall of the housing, the auxiliary guide wall being convex towards the bottom wall of the housing of the housing. in such a way that these two walls form a convergent profile with respect to an air flow oriented along the optical axis, the air channeling means being arranged so as to open upwards or downstream from the place the narrowest of the convergent profile.
  • the guide wall is preferably fixed to the housing.
  • the device comprises one or more additional ventilation orifices on a portion of the housing corresponding to the upper half of said housing, preferably to an upper quarter of said housing.
  • the channeling means or means are one or more baffles and / or one or more air ducts.
  • the cross section of the outer surface and / or the passage inside the or at least one duct is delimited by a closed loop curve viewed from the outside, preferably globally a circle, or an ovoid.
  • the cross section of the outer surface and / or the inner surface of the deflector is delimited by a convex curve seen from the outside, is generally a semicircle or an ovoid, and by the wall of the case.
  • the invention also relates to a motor vehicle comprising: a front bumper; a cap ; and at least one light device disposed between the bumper and the hood; remarkable in that the light device or devices are in accordance with the invention.
  • the ventilation duct or ducts open above an upper wall of the bumper.
  • the upper wall of the bumper is convex towards the bottom wall of the housing so that these two walls form a convergent profile with respect to an air flow caused by the displacement.
  • the vehicle or the air channeling means being arranged so as to open up or downstream of the narrowest point of the convergent profile.
  • the measures of the invention are interesting in that they make it possible to ventilate the light device in an economical and reliable manner. Indeed, the invention exploits optimally the wind created by the movement of the vehicle, by acceleration or deceleration thereof. More particularly, the invention exploits the space usually available between the bottom of the device and the bumper. Ventilation air circulation is more efficient even at low vehicle speeds.
  • the figure 1 illustrates the front of a vehicle 2 according to the invention. More specifically, it illustrates the left front part of the vehicle, it being understood that what will be described in relation to this part of the vehicle is also valid for the right front part of said vehicle.
  • the vehicle 2 comprises, conventionally, a front bumper 4, a cover 6 and a projector 8 disposed between the bumper 4 and the cover 6.
  • the projector 8, and a part of the bumper 4 are illustrated in the figure 2 along the axis of section II-II visible at the figure 1 .
  • the projector 8 shown in the figure 2 corresponds to a first embodiment of the invention. It comprises a housing 10 consisting of several walls 10 1 , 10 2 and 10 3 , in particular.
  • the housing 10 forms a volume with an opening covered by ice 12. This is usually made of mineral or organic glass.
  • the projector 8 comprises, conventionally, one or more modules 14 lighting and / or signaling. It can be the lighting functions of the code type (or low beam) and road type, as well as light-signaling functions such as a direction indicator (flashing) and a lantern (position lights).
  • the optical axis 24 of the lighting functions of the module or modules is represented in FIG. figure 2 .
  • the forward direction corresponds to the right side of the figure and corresponds to the direction of movement of the vehicle forward.
  • the rear direction corresponds to the left side of the figure 2 and is opposed to the forward direction.
  • the lower wall 10 3 of the housing 10 comprises, on its front portion corresponding to the first quarter of its length, a ventilation orifice 16.
  • This orifice 16 is connected directly to a deflector 18 with an inlet 20 opening essentially along the optical axis 24 forward.
  • the deflector 18 connects the orifice 16 to the outlet 20 exclusively, namely that the guide wall, between its inlet 20 and the orifice 16, orients the flow of air coming from the front.
  • the deflector channels the flow between the inlet 20 and the ventilation port 16. With the inlet 20 facing the air flow caused by the displacement of the vehicle, the deflector 18 can convert the speed of the air under pressure, similar to a pitot tube.
  • the pressure that prevails there is thus the total pressure of the air flow, namely the sum of the static pressure and the dynamic pressure of the air flow.
  • the pressure inside the deflector 18 is thus greater than the atmospheric pressure when the vehicle equipped with the projector 8 moves forward. This overpressure generates a start of ventilation air. In this case, this air flow is ascending along the inner face of the window 12.
  • the housing 10 comprises an upper portion, in this case on the upper wall 10 1 , a complementary ventilation orifice 22, intended to allow the evacuation of the air flow outside the housing 10.
  • FIG. figure 1 Although only one ventilation port 16, a single deflector 18 and a single complementary ventilation port are shown in FIG. figure 1 however, many of these elements may be present. It is conceivable to provide several ventilation orifices 16 combined with several deflectors 18 and / or to provide several additional ventilation orifices 22.
  • the deflector 18 preferably has a semicircle or ovoid shape depending on the curved surface and may for example have a circular section. Its section can indeed extend transversely so as to exploit the shape of the space available between the housing 10 and the bumper 4. The deflector can thus also be partitioned.
  • This deflector has the advantage in terms of shape to be molded in the housing 10, or to be attached by a part fixed on the housing 10.
  • a filter may be added by gluing or welding at the orifice 16 in order to limit the entry of dust.
  • FIGS. 4 to 7 are sectional views of a projector, similar to the figure 2 but corresponding however to other embodiments of the invention.
  • the reference numbers of the first embodiment according to the figure 2 are used for identical or corresponding elements, these numbers being however increased by 100, 200, 300 and 400, respectively, in order to clearly distinguish the different embodiments. Specific numbers are used for the specific elements of these different embodiments.
  • the ventilation air flow is descending and no longer ascending as in the first embodiment.
  • the deflector 118 connected to the ventilation opening 116 on the bottom wall 110 3 of the housing is oriented opposite to the first embodiment, namely so as to open in the direction of the air flow caused by the movement of the vehicle.
  • the opening portion 120 of the baffle is no longer an entry but an exit. Indeed, the air flow caused by the movement of the vehicle bypasses the outer surface of the deflector 118.
  • the air in contact with the deflector is accelerated, causing a depression in application of the Bernoulli principle.
  • the depression thus created at the exit 120 causes an air flow by suction.
  • One or more complementary orifices 122 are provided at the housing 110, preferably at an upper part of said housing.
  • a complementary ventilation opening 122 is provided at an upper part of the rear wall 110 2 of the housing. The air flow thus caused descends along the inner face of the ice 112.
  • this deflector has the advantage, in terms of shape, to be molded in the housing 110, or to be attached by a part attached to the housing 110. Similarly a filter can be glued or welded at the orifice 116 to limit the entry of dust.
  • the baffle forms a flow channel that causes a leak-free air outlet between the outlet 120 and the corresponding vent port 116 in the housing wall.
  • This form of deflector makes it possible to draw through the depression at the outlet 120 and to cause air circulation inside the housing.
  • the outlet 120 being disposed downstream of the deflector, is thus positioned directly in the wake of the accelerated air flow zone by the bypass of the deflector 118.
  • the latter can therefore take other forms than that illustrated in FIG. figure 3 (also applicable to figure 5 ). It may indeed have a more contoured outer surface, able to accelerate optimally the flow of air meeting it.
  • the ventilation orifices 116 are preferably arranged on a front portion of the casing so as to form the flow of ventilation air along the ice 112.
  • the figure 5 illustrates a variant of the invention, corresponding to a third embodiment.
  • This third embodiment is a variant of the second embodiment of realization at the figure 4 , it being understood that this variant is particularly applicable also to the first embodiment.
  • the variant illustrated in figure 5 consists in providing a bottom wall 210 3 of the housing which forms a convergent profile capable of accelerating the air flow caused by the movement of the vehicle. It is in this case the wall portion 210 4 which forms a convergent profile.
  • the deflector 218 and more particularly its outlet 220 are ideally arranged downstream or directly at the outlet of the convergent profile in order to optimally exploit the acceleration effect of the fluid. Indeed, the fluid being accelerated, its static pressure decreases, which promotes the suction effect. In addition, the fact that it is initially accelerated means that it will be even faster along the outer wall of the deflector 218 and thus promote the depression associated with this acceleration.
  • the housing 310 of the projector 308 comprises a guide wall 326 extending along the bottom wall 310 3 so as to form a convergent profile capable of accelerating the air flow caused by the movement of the vehicle.
  • the deflector 318 and more particularly its output 320 are ideally arranged downstream or directly at the outlet of the convergent profile in order to optimally exploit the acceleration effect of the fluid.
  • the figure 7 illustrates a further variant of the embodiment of the figure 4 , it being understood that this variant also applies in particular to the embodiments of the figures 2 , 5 and 6 , the deflector figures 2 , 5 and 6 being replaced by one or more conduits 418.
  • This duct 418 may have a substantially constant section. However, it can also vary.
  • the duct 418 is thus projecting from the bottom wall 410 3 .
  • the wall of the duct 418 is closed so as to exclusively connect the ventilation orifice 416 to the outlet 420 of the duct.
  • the conduit 418 is oriented to open in the direction of the air flow caused by the movement of the vehicle.
  • the air flow caused by the movement of the vehicle bypasses the outer surface of the duct 418.
  • the air in contact with the duct is accelerated, which causes a depression in application of the Bernoulli principle.
  • the depression thus created at the level of the outlet 420 causes a suction air flow, similar to the embodiments of the Figures 4 to 6 .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP15173855.6A 2014-06-27 2015-06-25 Scheinwerfer für fahrzeug mit belüftungsleitung Withdrawn EP2960573A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1456099A FR3024764B1 (fr) 2014-06-27 2014-06-27 Projecteur pour vehicule avec conduit de ventilation

Publications (2)

Publication Number Publication Date
EP2960573A2 true EP2960573A2 (de) 2015-12-30
EP2960573A3 EP2960573A3 (de) 2016-01-13

Family

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Application Number Title Priority Date Filing Date
EP15173855.6A Withdrawn EP2960573A3 (de) 2014-06-27 2015-06-25 Scheinwerfer für fahrzeug mit belüftungsleitung

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EP (1) EP2960573A3 (de)
FR (1) FR3024764B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108150962A (zh) * 2016-12-05 2018-06-12 大众汽车有限公司 用于机动车的照明设备
WO2021115608A1 (en) * 2019-12-12 2021-06-17 Toyota Motor Europe Vehicle headlight outer lens

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19641915A1 (de) 1996-10-11 1998-04-16 Bosch Gmbh Robert Scheinwerfer für Kraftfahrzeuge

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2698055B1 (fr) * 1992-11-18 1995-02-03 Peugeot Bloc optique ventilé, notamment pour véhicule automobile.
DE19524163A1 (de) * 1995-07-03 1997-01-30 Daimler Benz Ag Anordnung für eine Kraftfahrzeugleuchte
US6071000A (en) * 1998-09-25 2000-06-06 Valeo Sylvania, L.L.C. Vehicle lamp with ram air vent
JP2002124123A (ja) * 2000-10-17 2002-04-26 Denso Corp 車両用前照灯
US7427152B2 (en) * 2005-12-05 2008-09-23 Visteon Global Technologies, Inc. Headlamp assembly with integrated housing and heat sink
US20090059594A1 (en) * 2007-08-31 2009-03-05 Ming-Feng Lin Heat dissipating apparatus for automotive LED lamp

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19641915A1 (de) 1996-10-11 1998-04-16 Bosch Gmbh Robert Scheinwerfer für Kraftfahrzeuge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108150962A (zh) * 2016-12-05 2018-06-12 大众汽车有限公司 用于机动车的照明设备
WO2021115608A1 (en) * 2019-12-12 2021-06-17 Toyota Motor Europe Vehicle headlight outer lens

Also Published As

Publication number Publication date
FR3024764A1 (fr) 2016-02-12
FR3024764B1 (fr) 2019-04-26
EP2960573A3 (de) 2016-01-13

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