EP1806532A1 - Kfz-Scheinwerfer mit drei Funktionen - Google Patents

Kfz-Scheinwerfer mit drei Funktionen Download PDF

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Publication number
EP1806532A1
EP1806532A1 EP06292013A EP06292013A EP1806532A1 EP 1806532 A1 EP1806532 A1 EP 1806532A1 EP 06292013 A EP06292013 A EP 06292013A EP 06292013 A EP06292013 A EP 06292013A EP 1806532 A1 EP1806532 A1 EP 1806532A1
Authority
EP
European Patent Office
Prior art keywords
actuating system
lighting
motor
function
cache
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Withdrawn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
EP06292013A
Other languages
English (en)
French (fr)
Inventor
Boris Wiegand
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 EP1806532A1 publication Critical patent/EP1806532A1/de
Withdrawn legal-status Critical Current

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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
    • 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
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/698—Shaft-shaped screens rotating along its longitudinal axis

Definitions

  • the invention relates to a light projection device for a motor vehicle in which the light beam cut-off cover provides three lighting functions, namely the road function, the code function and a third function.
  • This third function may be the bad weather function or the city lighting function or the motorway lighting function.
  • the invention has applications in the field of motor vehicle lighting and, in particular, in the field of lighting according to the new regulation RXXX which allows the use of additional lighting functions.
  • Such a bifunctional projector generally comprises a removable cover capable of ensuring a cut-off of the light beam.
  • This cover is, for example, a metal flap that can move from a first position to a second position. In the first position, the cover does not obscure the light beam produced by the light source of the projector. In the second position, the cache partially obscures the light beam produced by the light source of the projector. In this second position, it is said that the cache performs a specific cut of the light beam. This specific cutoff corresponds to the cutoff of the light beam needed to obtain the code function.
  • the motor driving the pivot axis is usually a DC motor, that is to say a motor which rotates continuously until reaching a stop.
  • the DC motor has a torque controlled by an electronic circuit, which has the effect that when the motor reaches a certain current, it is in abutment.
  • the engine thus offers two states: the one where it rotates and the one where it is in abutment, which corresponds to two positions of the cache.
  • the cutoff means comprise a single cache. In this case, when the engine is in a first operating state, the cover is in a neutral position where it does not obscure the light beam.
  • the projector is on route.
  • the cache is in its occultation position.
  • the projector is in function code.
  • each cache must include its own pivoting means and its own control means. It is therefore clear that the more caches there are, the more difficult and cumbersome it is to make the projector. In addition, the more caches and the more the displacement of each cache must be precise not to disturb the movement of other caches and the light beam.
  • each of the two covers is mounted on its own pivot axis and actuated by its own DC motor.
  • Each cache therefore has its own actuating means.
  • the covers and their respective actuating means must be placed in the projector so that the code function cover does not interfere with the light beam when the projector is used in its new function, and vice versa.
  • the size due to a cover and its actuating means is at least doubled compared to a bifunctional projector.
  • the invention provides a light projection device for obtaining at least a third lighting function without complicating the control of the covers and limiting the size due to the third function.
  • the light projection device of the invention comprises at least two covers mounted on the same pivot axis, rotated by a single DC motor. It further comprises a linear actuation system providing at least an intermediate blocking of the DC motor, generating at least a third stop of said motor.
  • the invention also relates to a vehicle comprising a light projection device as described above.
  • FIG. 1 represents a perspective view of a motor vehicle headlight cut-off module according to the invention.
  • FIG. 2 represents another perspective view of the cleavage module of FIG. 1.
  • Figure 3 is a schematic representation of the stop member blocking the rotation of the DC motor of the projector according to the invention.
  • FIG. 4 is a schematic representation of a solenoid driving the displacement of the stop element of FIG. 3.
  • FIG. 5 shows examples of curves representative of the electromagnetic force in the solenoid of FIG. 4.
  • the projector of the invention is a trifunctional floodlight providing the driver with at least three lighting functions.
  • This trifunctional projector comprises, like conventional dual-function projectors, a reflector inside which is installed a light source, itself mounted on an electrical connection module.
  • the light source emits a light beam, reflected by the reflector towards an output optic.
  • a breaking module Between the light source and the output optic is mounted a breaking module.
  • This breaking module comprises, on the one hand, means for making a cut-off of the light beam and, on the other hand, a system for actuating these breaking means.
  • the breaking means comprise caches able to partially obscure the light beam emitted by the light source.
  • the breaking means comprise a first cache providing a code-type cutoff of the light beam to perform the code function of the projector and a second cache for performing the third lighting function.
  • FIG. 1 An example of a breaking module according to the invention is shown in FIG. 1.
  • This FIG. 1 shows a breaking module 1 with its breaking means 2, its first actuating system 3 and its second operating system 3. .
  • the breaking means 2 are mounted around a pivot axis 34.
  • This pivot axis 34 constitutes one of the elements of the first actuating system 3.
  • This first actuating system 3 has the role of rotating the means 2.
  • This first actuation system is a rotational system.
  • the pivot axis 34 is rotated by a DC motor 31 connected to a gear 32 - 33.
  • the motor 31 therefore drives, in rotation, a gear element 32 which itself drives a wheel gear 33, in a contrary direction.
  • the pivot axis 34 is fixed to the center of the gear wheel 33 by means of a fixing element 35. In this way, the motor 31 ensures the rotation of the pivot axis 34.
  • the breaking means 2 are mounted on this axis of pivoting 34, the motor 31 causes the pivoting means 2 to pivot.
  • the motor 31 Since the motor 31 is a DC motor, it has an electronically controlled torque. Thus, when the current supplying the motor reaches a given value of the current, the motor is in abutment. The current in the motor being controlled, the motor does not heat up. This motor 31 thus has two states (rotating and abutting), made by controlling the supply current. Each of these states generates a position of the cutoff means.
  • the breaking means comprise at least two covers 23 and 24. These two covers are mounted on the same pivot axis 34. They are distant from each other by an angle of between 90.degree. 180 °.
  • the first cache 23 has a cutout corresponding to the cutoff for the code function.
  • the second cache 24 has a cutout corresponding to the cutoff for the third function.
  • the first or the second cache, or even the two caches can be a double cache, that is to say a cache equipped with two flaps placed in V with respect to each other, to allow to solve problems. chromatic problems due to the specifics of the light spectrum of certain light sources such as xenon sources. It should be noted that a double cache has no influence on the shape of the cut.
  • the breaking means When the motor 31 is in its first state, that is to say out of stop, the breaking means are in the neutral position. In other words, none of the covers obscure the light beam.
  • the breaking means When the motor 31 is in its second state, that is to say in abutment, the breaking means are in a first cut position. In other words, the first cover 23 is in the occultation position of the light beam while the second cover 24 is in the retracted position so as not to interfere with the cutoff of the first cover 23 and thus, not to intercept the light beam from of the light source.
  • the projector of the invention comprises a second actuating system 4 intended to block the rotation of the first system. actuation.
  • This second actuation system 4 is a linear actuation system. It acts by linear displacement of mechanical elements to block the rotary displacement of the first actuating system.
  • the second actuation system 4 comprises a linear actuator 41.
  • This actuator 41 may be, for example, a linear motor, a solenoid or any means of linear motion.
  • This linear actuator 41 is connected, via an actuating arm 42, 43, to an abutment element 44.
  • This actuating arm may comprise, for example, a lower rod 42 fixed at the output of the linear actuator 41 and a high rod 43 fixed on the lower rod 42.
  • This high rod 43 maintains the abutment element 44.
  • This abutment element 44 for example a key, has the role of being inserted into the housing. inside a housing made in the rotary actuating system 3.
  • the first actuating system 3 comprises, at one end of the pivot axis 34 opposite to the gear wheel 33, a decoding wheel 36.
  • This decoding wheel 36 comprises a housing 38 intended to receive the
  • the key 44 is inserted in the decoding wheel 36, blocking the rotation of the pivot axis 34.
  • Rotational actuation 3 is thus locked in a second abutment position, called the intermediate position.
  • This intermediate position is a position between the cutoff position and the neutral position of the cutoff means. This intermediate position corresponds to the occultation position of the second cover 24. When the breaking means are in this intermediate position, then the light beam offers a third lighting function.
  • the motor 31 when the motor 31 is in operation, out of stop, the projector is in road lighting. For the projector to remain in the road position, it is necessary that the motor continues to be supplied with a holding current. If a current of value different from that of the holding current is received by the motor, then the motor reaches its first stop, that is to say that corresponding to the occultation position of the first cover 23. If the element stop 44 is inserted into its housing 28, then the motor reaches its second stop, that is to say that corresponding to the occultation position of the second cover 24.
  • this return spring 22 makes it possible to rotate the breaking means in a safety position, corresponding to the code function, in the event of an electrical problem in the projector.
  • FIG. 2 shows the same breaking module as Figure 1, at a different angle.
  • This FIG. 2 notably shows the actuating arm 42, 43 installed between the decoding wheel 36 and the linear actuator 41.
  • FIG. 3 schematically represents a stop element 44 intended to be inserted in a housing 38 of the decoding wheel 36.
  • This housing 38 may simply be a straight housing, constituted by a bulge 37 forming an L with the surface of the wheel decoding 36 and against which the stop element 44 comes into contact to block the rotation of the rotary actuating system 3.
  • the housing 38 may preferably be a recess 39 made in the immediate vicinity of the bulge 37.
  • This obviously 39 has a shape adapted to the shape of the stop element 44, for example a V-shape when the stop element is a key with a prismatic tip.
  • Such a housing 38 obviously has the advantage of avoiding rebound effects and, thus, to ensure better positioning of the breaking means.
  • the linear actuator 41 is a solenoid.
  • a solenoid is a cylindrical coil consisting of a wire wound in contiguous turns. When the coil is traversed by an electric current, it creates a magnetic field inside the coil. A metal part 41 d installed inside the coil undergoes this magnetic field, which has the effect of moving said metal part inside the coil.
  • the metal piece 41 d, or magnetic core is attached to the lower rod 42 of the actuating arm which has the effect that, when the core moves in the coil, it causes the lower rod 42, which itself drives the high rod 43 and the stop element 44.
  • the solenoid has the advantage of being able to include a glued abutment.
  • This bonded abutment corresponds to the magnetic bonding of the solenoid core against a metal surface on the front of said solenoid.
  • the solenoid 41a is installed inside a metal case 41b.
  • This housing 41b has a metal wall 41c. When the core moves towards the metal wall 41c, under the effect of magnetism, said core sticks magnetically against the metal wall.
  • This metal wall 41c is also the stop of the core. This is called stuck abutment.
  • the lower rod 42 of the actuating arm comprises a flange 45 adapted to be bonded to the solenoid core in bonding phase.
  • FIG. 5 shows examples of holding current curves making it possible to obtain the bonding abutment. These curves are represented in a reference having, as abscissa, the displacement in seconds per millimeter (s / mm) and in ordinate the electrical capacitance per unit of force (F / N); they are given as a percentage of duty cycles per time (PWM). As can be seen in this figure, whatever the value of the holding current, the bonded abutment is obtained at 7 s / mm, for a given solenoid.
  • the bonding effect of the core makes it possible to reduce the value of the holding current, which further limits the rise in temperature of the solenoid.
  • the use of a glued abutment makes it possible to limit the rise in temperature of the solenoid to a temperature of approximately 25 degrees for a static current lower than the holding current.
  • the solenoid comprises a return spring, inside or possibly outside, which has the effect of releasing the rotation, if the supply current of the solenoid becomes zero.
  • the cut-off means return to the safety position, that is to say in the cut-off position.
  • Such a linear actuation system allows the realization of a third lighting function with a second cache operated without additional current. It can also allow the implementation of a road function without using a holding current for the engine.

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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)
EP06292013A 2006-01-05 2006-12-21 Kfz-Scheinwerfer mit drei Funktionen Withdrawn EP1806532A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0600094A FR2895783B1 (fr) 2006-01-05 2006-01-05 Projecteur de lumiere a trois fonctions pour vehicule automobile

Publications (1)

Publication Number Publication Date
EP1806532A1 true EP1806532A1 (de) 2007-07-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06292013A Withdrawn EP1806532A1 (de) 2006-01-05 2006-12-21 Kfz-Scheinwerfer mit drei Funktionen

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EP (1) EP1806532A1 (de)
FR (1) FR2895783B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015019021A1 (fr) * 2013-08-06 2015-02-12 Aml Systems Mécanisme de coupure de faisceau lumineux pour module optique et le module optique

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339226A (en) * 1992-06-03 1994-08-16 Koito Manufacturing Co., Ltd. Projection head lamp for cars
EP0900972A1 (de) * 1997-09-06 1999-03-10 Hella KG Hueck & Co. Scheinwerfer für Fahrzeuge
EP1279893A1 (de) * 2001-07-26 2003-01-29 Valeo Vision Kfz-Scheinwerfer nach dem Projektionprinzip mit um eine Querachse schwenkbaren Blenden
DE10216678A1 (de) * 2002-04-16 2003-12-11 Hella Kg Hueck & Co Projektionsmodul für einen Fahrzeugscheinwerfer
DE10334553A1 (de) * 2003-07-30 2005-06-16 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
DE102004025228A1 (de) * 2004-05-22 2005-12-08 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339226A (en) * 1992-06-03 1994-08-16 Koito Manufacturing Co., Ltd. Projection head lamp for cars
EP0900972A1 (de) * 1997-09-06 1999-03-10 Hella KG Hueck & Co. Scheinwerfer für Fahrzeuge
EP1279893A1 (de) * 2001-07-26 2003-01-29 Valeo Vision Kfz-Scheinwerfer nach dem Projektionprinzip mit um eine Querachse schwenkbaren Blenden
DE10216678A1 (de) * 2002-04-16 2003-12-11 Hella Kg Hueck & Co Projektionsmodul für einen Fahrzeugscheinwerfer
DE10334553A1 (de) * 2003-07-30 2005-06-16 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
DE102004025228A1 (de) * 2004-05-22 2005-12-08 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015019021A1 (fr) * 2013-08-06 2015-02-12 Aml Systems Mécanisme de coupure de faisceau lumineux pour module optique et le module optique
FR3009602A1 (fr) * 2013-08-06 2015-02-13 Aml Systems Mecanisme de coupure de faisceau lumineux pour module optique et le module optique
CN105452761A (zh) * 2013-08-06 2016-03-30 Aml系统公司 用于切断光学模块的光束的机构以及该光学模块
CN105452761B (zh) * 2013-08-06 2018-08-31 Aml系统公司 用于切断光学模块的光束的机构以及该光学模块

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FR2895783A1 (fr) 2007-07-06
FR2895783B1 (fr) 2008-02-01

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