EP3327335A1 - Phare et procédé de fonctionnement d'un phare - Google Patents

Phare et procédé de fonctionnement d'un phare Download PDF

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Publication number
EP3327335A1
EP3327335A1 EP17198239.0A EP17198239A EP3327335A1 EP 3327335 A1 EP3327335 A1 EP 3327335A1 EP 17198239 A EP17198239 A EP 17198239A EP 3327335 A1 EP3327335 A1 EP 3327335A1
Authority
EP
European Patent Office
Prior art keywords
air
headlight
headlamp
operating situation
critical operating
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
EP17198239.0A
Other languages
German (de)
English (en)
Other versions
EP3327335B1 (fr
Inventor
Bernd Mühlbauer
Markus Kindler
Achim Bathe
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.)
Marelli Automotive Lighting Reutlingen Germany GmbH
Original Assignee
Automotive Lighting Reutlingen GmbH
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 Automotive Lighting Reutlingen GmbH filed Critical Automotive Lighting Reutlingen GmbH
Publication of EP3327335A1 publication Critical patent/EP3327335A1/fr
Application granted granted Critical
Publication of EP3327335B1 publication Critical patent/EP3327335B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • F21S45/40—Cooling of lighting devices
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas
    • 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
    • F21S45/60—Heating of lighting devices, e.g. for demisting

Definitions

  • the invention relates to a headlamp according to the preamble of claim 1 and a method for operating the headlamp according to the preamble of an independent claim.
  • the object of the invention is to ensure an exchange of air with the environment during operation of the vehicle (even when stationary, such as a traffic jam situation). This minimizes the dewing risk and increases the defrosting speed even if the disc is already in beta.
  • An air guide arrangement within the headlight housing comprises a fan operable in dependence on the determined condensation-critical operating situation of the headlight, by means of which air can be conveyed from the air inlet opening for cooling the light module to the air outlet opening.
  • the fan greatly reduces the risk of condensation, in particular the cover.
  • the Enttauungs Republic can be greatly accelerated.
  • an air exchange of the headlamp can be ensured with the ambient air.
  • the arrangement of the air inlet opening and the air outlet opening can be selected within wide limits. A positioning of the aforementioned openings for the generation of a differential pressure is no longer necessary.
  • the respective opening can be arranged on a side of the headlight housing facing the vehicle floor.
  • An advantageous embodiment of the headlamp is characterized in that the condensation-critical operating situation includes a vehicle speed of zero km / h. With the aid of the vehicle speed, a high number of condensation-critical operating situations can advantageously be recorded.
  • An advantageous embodiment of the headlamp is characterized in that a non-condensation-critical operating situation is determined, wherein the fan is turned off in response to the determined non-condensation critical operating situation.
  • a non-condensation-critical operating situation is determined, wherein the fan is turned off in response to the determined non-condensation critical operating situation.
  • An advantageous embodiment of the headlamp is characterized in that the non-condensation-critical operating situation is determined when after a time of determining the condensation-critical operating situation a predetermined period of time has expired. It is thus created a simple way to energy-efficient design of the headlamp.
  • a suction line supplied to the fan comprises a passage opening which connects the interior of the suction line with an interior of the headlight housing in an air-conducting manner. If the suction line is blocked, for example, in the region of a filter in the region of the air inlet opening, then a circulation of air within the headlight can continue to be ensured. In normal operation, about 20% of the circulated volume of air is fresh air. This is achieved by adapting the cross-section of the suction line and the size of the passage opening to the interior and by the air permeability of the filter.
  • a drain line comprises a passage opening which connects the interior of the drain line with an interior of the headlight housing air-conducting. If the drain line is blocked, for example, in the region of a drain opening, then a circulation of air within the spotlight can continue to be ensured.
  • An advantageous embodiment of the headlight is characterized in that an outlet opening of a drain line of a cover, which closes a light exit opening of the headlight housing, facing arranged. This can advantageously ascend warm air on the inside of the cover and effectively prevents or reduces condensation on the cover
  • An air guide arrangement within the headlight housing comprises a ventilator operated as a function of the determined condensation-critical operating situation of the headlamp, by means of which air can be conveyed from the air inlet opening for cooling the light module to the air outlet opening.
  • FIG. 1 shows a schematic sectional view of a headlight 2, the cover 4 closes a light exit opening of a headlight housing 6.
  • the headlight 2 is arranged in a front region of a motor vehicle 1 between body parts 3 and 5.
  • a light module 8 is arranged, which radiates a Abstrahllichtver gutter 10 through the substantially transparent cover 4 through into an area in front of the motor vehicle.
  • the light module 8 comprises at least one light source, for example a semiconductor light source, which during its operation Generates heat energy.
  • a cooling arrangement 12 in the present case comprises a heat sink 14 and a fan 16.
  • the fan 16 is preferably arranged inside the spotlight housing 6.
  • the fan 16 includes, for example, an electric motor and arranged on a rotor of the electric motor rotor blades.
  • the heat sink 14 is thermally conductively connected to the light module 8.
  • the fan 16 ensures that cooling fins of the heat sink 14 are flowed around by air in order to provide heat removal from the heat sink 14 and thus from the light module 8.
  • heat sink 14 and fan 16 may also be arranged at a distance from the light module 8, for example heat pipes for connecting the heat sink 14 to the light module 8 being provided.
  • the heat pipes provide degrees of freedom for the use of the available space in the headlight housing.
  • the fan 16 is connected by means of a suction line 18 leading to air at the bottom of the headlight housing 6 arranged air inlet opening 20, which in the present case comprises an air filter 22, respectively.
  • the air filter 22 may be designed to be changeable.
  • the air inlet opening 20 is preferably spaced apart from a region which is substantially influenced by waste heat of an engine of the motor vehicle 1. This avoids that already heated air is supplied to the light module 8.
  • this intake pipe is preferably arranged at a distance from the region which is substantially influenced by the waste heat of the engine.
  • a control unit 24 operates by means of a signal 26, the fan 16 so that the fan 16 sucks air from an outer space 28 and leads over the heat sink 14. Thus, a dissipation of heat away from the light module 8 and thus cooling of the light module 8 takes place.
  • the control unit 24 comprises a processor unit and a memory unit, wherein a computer program is stored on the memory unit, which executes the method steps described here, as far as it is executed on the processor unit.
  • the air flow flowing past the heat sink 14 or flowing through the heat sink 14 is conducted into an interior space 30 of the spotlight housing 6. Due to the introduced air, a slight overpressure arises within the interior 30, which causes the air in the interior 30 to flow out through an air outlet opening 32 into the exterior space 28 of the spotlight housing 6.
  • the control unit 24, a vehicle speed 34 is supplied.
  • the controller 24 can be supplied to other variables such as an ambient temperature to determine a betau critical operating situation.
  • the control unit 24 determines a condensation-critical operating situation of the headlight 2. If this condensation-critical operating situation prevails, the fan 16 is operated to force circulation of air.
  • the condensation-critical operating situation can take place independently of the operating situation of the light module 8 to generate light. This means that the fan is operated even when the light module 8 is switched off when determining the condensation-critical situation.
  • the control unit 24 determines that the vehicle speed 34 is below a threshold value of, for example, 20 km / h, 10 km / h or even 0 km / h, if the fan 16 is not already operated, the fan 16 becomes one Forced circulation of air switched on. During operation, the fan 16 conveys air from the air inlet opening 20 for cooling the light module 8 past it to the air outlet opening 32. The forced operation of the fan 16 during the condensation-critical operating situation ensures that the probability of condensation of water on the cover pane 4 is high is reduced.
  • the condensation-critical operating situation includes, for example, a temporary parking of the vehicle in a parking lot.
  • Another example of a dew critical operating situation is stopping the vehicle during a traffic jam. In these two condensation-critical operating situations, without forced circulation of air by means of the fan 16, an unnecessary heat input into the interior space 30 of the spotlight housing 6 can take place.
  • the condensation-critical operating situation is determined.
  • the condensation-critical operating situation is present when a temperature determined by means of a temperature sensor arranged outside of the headlight housing 6 falls below a threshold value and a driving state comprises falling below a vehicle speed.
  • the control unit 24 also determines if a non-condensation-critical operating situation of the headlight 2 entry. In the non-condensation-critical operating situation, the control unit 24 releases a shutdown of the fan 16 or turns off the fan 16. However, if the light module 8 is operated to emit light, then it may be necessary for it to continue to be cooled, which is why a shutdown of the fan 16 takes place only after switching off the light module 8.
  • the non-condensation-critical operating situation can be determined, for example, when a predetermined period of time has elapsed after the condensation-critical operating situation has been determined. This causes, for example, when parking the vehicle for parking some wake of the fan 16th
  • the intake pipe 18 includes in its course a passage opening 36, which connects an interior of the intake pipe 18 with the interior 30 of the headlight housing 6.
  • the effective for the air flow cross-section of the passage opening 36 is smaller than the effective for the air flow cross-section of the air inlet opening 20 and just so large that at unintentionally closed air inlet opening 20 still an air flow by means of the fan 16 can be generated.
  • An air guide arrangement within the interior 30 of the headlight 2 comprises the fan 16 and the suction line 18.
  • FIG. 2 shows a further embodiment of the headlamp 2 in a schematic sectional view.
  • Air sucked from the interior 30 by means of the fan 16 disposed within the headlight 2 and guided over the heat sink 14.
  • a drain line 38 connects, in which the guided over the heat sink 14 air to the air outlet opening 32 is feasible.
  • the Drain line 38 has a passage opening 40, which connects an interior of the drain line 38 with the interior 30 of the headlight housing 6 fluidly.
  • the effective for the air flow cross section of the passage opening 40 is smaller than the effective for the air flow cross section of the air outlet opening 32 and just so large that in the unintentionally closed air outlet 32 still an air flow can be generated by means of the fan 16.
  • An air guide assembly within the interior 30 includes the fan 16 and the drain line 38. The operation of the fan 16 by means of the controller 24 is as to FIG. 1 described feasible.
  • FIG. 3 shows a further embodiment of the headlamp 2 in a schematic sectional view.
  • the drain opening 44 is located in a front lower portion of the inner space 30.
  • the outflow line 42 thus ends in the vicinity of the cover 4.
  • the air exiting the outlet opening 44 has previously been heated by the waste heat of the light module 8 and rises along an inner wall of the cover 4 in the inner space 30 and thus ensures a forced circulation of air in Area of the inner wall of the cover 4, which prevents or reduces condensation of water on the inner wall of the cover 4.
  • An air guide assembly within the interior 30 includes the intake conduit 18, the fan 16, and the drain conduit 42. The operation of the fan 16 by means of the controller 24 is as to FIG. 1 described feasible.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP17198239.0A 2016-11-28 2017-10-25 Phare et procédé de fonctionnement d'un phare Active EP3327335B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016122874.5A DE102016122874A1 (de) 2016-11-28 2016-11-28 Scheinwerfer und Verfahren zum Betreiben des Scheinwerfers

Publications (2)

Publication Number Publication Date
EP3327335A1 true EP3327335A1 (fr) 2018-05-30
EP3327335B1 EP3327335B1 (fr) 2022-08-24

Family

ID=60182456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17198239.0A Active EP3327335B1 (fr) 2016-11-28 2017-10-25 Phare et procédé de fonctionnement d'un phare

Country Status (3)

Country Link
US (1) US20180149334A1 (fr)
EP (1) EP3327335B1 (fr)
DE (1) DE102016122874A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3336414B1 (fr) * 2016-12-15 2022-01-26 FCA Italy S.p.A. Désembuage/dégivrage de phare de véhicule automobile
FR3082279B1 (fr) * 2018-06-08 2021-06-11 Valeo Vision Extracteur d'air pour projecteur de vehicule automobile
FR3083180B1 (fr) * 2018-06-29 2022-04-15 Valeo Vision Procede de commande d'un extracteur d'air de projecteur pour un vehicule automobile.
CN111102534B (zh) * 2018-10-29 2021-10-19 长城汽车股份有限公司 一种大灯的散热控制系统、方法及车辆
US10907794B2 (en) 2019-02-27 2021-02-02 Magna Closures Inc. Headlight assembly with lens heater
CZ2019588A3 (cs) * 2019-09-16 2021-03-24 Varroc Lighting Systems, s.r.o. Světelné zařízení pro motorové vozidlo
WO2021230758A1 (fr) * 2020-05-13 2021-11-18 Llerena Lazo Jose Felix Rogelio Dispositif pour éviter la formation de rosée dans les phares de véhicules
EP4217648A1 (fr) 2020-09-28 2023-08-02 HELLA GmbH & Co. KGaA Lentille couvercle pour un dispositif d'éclairage de véhicule
DE102022122285A1 (de) 2022-09-02 2024-03-07 HELLA GmbH & Co. KGaA Kunststoffabschlussscheibe für eine Beleuchtungseinrichtung eines Kraftfahrzeugs und Verfahren zur Herstellung einer Kunststoffabschlussscheibe

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2701756A1 (fr) * 1993-02-17 1994-08-26 Peugeot Bloc optique ventilé notamment pour véhicule automobile.
DE19726328A1 (de) 1997-06-20 1998-12-24 Bosch Gmbh Robert Beleuchtungseinrichtung für Fahrzeuge
DE19962214A1 (de) * 1999-12-22 2001-06-28 Bayerische Motoren Werke Ag Scheinwerferbetauungsschutz-Vorrichtung
JP2002124123A (ja) * 2000-10-17 2002-04-26 Denso Corp 車両用前照灯
EP2020569A2 (fr) * 2007-08-01 2009-02-04 odelo GmbH Système de phare doté d'un dispositif de désembuage commandé et/ou réglé
KR20130052958A (ko) * 2011-11-14 2013-05-23 현대자동차주식회사 헤드램프의 습기제거구조
DE102014106793A1 (de) * 2014-05-14 2015-11-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kraftfahrzeugscheinwerfer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0859188A3 (fr) * 1997-02-12 1999-09-08 Volkswagen Aktiengesellschaft Dispositif pour éviter la formation de la rosée pour projecteur
US7262388B2 (en) * 2005-04-28 2007-08-28 Illinois Tool Works Inc Vehicle light heater
KR101796115B1 (ko) * 2010-10-13 2017-11-13 삼성전자 주식회사 헤드램프조립체 및 이를 구비하는 자동차
DE102016005936B4 (de) * 2016-05-14 2018-04-26 Audi Ag Beleuchtungsvorrichtung für ein Kraftfahrzeug, Kraftfahrzeug und Verfahren zum Kühlen einer Beleuchtungsvorrichtung für ein Kraftfahrzeug

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2701756A1 (fr) * 1993-02-17 1994-08-26 Peugeot Bloc optique ventilé notamment pour véhicule automobile.
DE19726328A1 (de) 1997-06-20 1998-12-24 Bosch Gmbh Robert Beleuchtungseinrichtung für Fahrzeuge
DE19962214A1 (de) * 1999-12-22 2001-06-28 Bayerische Motoren Werke Ag Scheinwerferbetauungsschutz-Vorrichtung
JP2002124123A (ja) * 2000-10-17 2002-04-26 Denso Corp 車両用前照灯
EP2020569A2 (fr) * 2007-08-01 2009-02-04 odelo GmbH Système de phare doté d'un dispositif de désembuage commandé et/ou réglé
KR20130052958A (ko) * 2011-11-14 2013-05-23 현대자동차주식회사 헤드램프의 습기제거구조
DE102014106793A1 (de) * 2014-05-14 2015-11-19 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Kraftfahrzeugscheinwerfer

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Publication number Publication date
DE102016122874A1 (de) 2018-05-30
US20180149334A1 (en) 2018-05-31
EP3327335B1 (fr) 2022-08-24

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