DE1597923B2 - HEADLIGHT SYSTEM FOR MOTOR VEHICLES - Google Patents

Description

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The invention relates to a headlight system for motor vehicles according to the preamble of the main claim. In such headlights, the two end positions of the reflector represent two different angular positions to the road so that it can be illuminated according to the current traffic situation, whereby it is necessary to involve the legal regulations.

In order to meet these requirements it is already, for example, from the French patent specification 90 961, known, the reflector of a headlight pivotable about a horizontal axis in two end positions in its first position to emit the high beam, while in its second position the same full bundle of light is inclined towards the road, which means that it is illuminated over a shorter distance. That The low beam, which does not disturb oncoming traffic, is provided by a fixed step reflector generated by other headlights. However, this shortened high beam, known as transition light, must be used in the Approaching a vehicle on the opposite lane can be switched off in a known manner, so that opposite the high beam / low beam switching that is customary today no longer offers particular advantages for the driver are visible.

The asymmetrical low beam prescribed by law is sufficient, especially in closed areas Locations with the known speed limit of 50 km / h, but its range is Not sufficient, especially on motorways, because the vehicle driver is usually not the driver of the Illumination of the roadway maintains adequate speed, which in the event of unforeseen obstacles conjures up dangerous traffic situations. To have sufficient illumination on motorways or enabling motorway-like routes without the high beam are already different proposals known; However, these did not meet all of the requirements or their feasibility was technically or economically not feasible.

The invention is therefore based on the object of proposing an additional, more far-reaching low beam, without the advantage of a pronounced gradation of brightness in the area of the light-dark border waive.

Starting from a headlight of the type mentioned in the preamble of the main claim, this Object by the arrangement according to the invention with the features characterized in the main claim solved. The arrangement according to the invention has the advantage that the roadway lying in front of the vehicle is sufficiently illuminated both in width and in width, without oncoming road users to hinder more than necessary. Another advantage is the adjustability of the low beam clockwise - with right-hand traffic - because with this measure driving ahead Drivers are much less dazzled by the rearview mirror.

The invention is explained in more detail below with reference to the exemplary embodiments shown in the drawing explained. It shows

F i g. 1 the light distribution of the low beam on one in front of the vehicle perpendicular to its longitudinal axis put up umbrella,

F i g. 2 the corresponding light distribution for motorway dipped beam,

F i g. 3 shows a schematic representation of the suspension of the reflector and that which can be brought about by the adjustment Change of the position of the cut-off line on the screen,

F i g. 4 a diagram with two adjustment directions and with the adjustment direction resulting from these two directions,

F i g. 5 and 6 circuit diagrams for the lighting device according to the invention.

The light distribution for the low beam is shown in FIG. 1, in which 7 the horizontal and 8 the rising branch of the cut-off line is denoted. The glare line 11, on which the driver's eye of the oncoming traffic moves in the beam of light shown, starts from the horizon point 9 (HV). The greatest illuminance is in the brightness focus 12, which decreases more and more towards the outside in accordance with the lines of equal brightness 13 to 17. Line 18 represents the right edge of the road.

According to the invention, the low beam is now also to be used as a motorway low beam by adjusting it can be. To do this, it should first be strengthened by using a halogen lamp happens.

Then it is by pivoting to the left (for right-hand traffic) in the direction of arrow 19 and through Turn clockwise in the direction of arrow 21

changed so that the one shown in Fig.2, for a A light distribution that can be used for dipped headlights is created. It can be seen from this Fig.2 that the Light distribution per se is the same as that in FIG. 1 shown; the picture is only to the side of the Swiveled oncoming traffic and rotated clockwise by about 3 °. Thereafter, the center of gravity 12 should be below the horizontal point 9 and the approximately horizontal branch 7 of the cut-off line is raised so far to the line 7 ' that it runs approximately parallel to the blend line 11. This increases the visibility. In addition, by twisting the light beam, the inclined Branch 8 'of the cut-off line is rotated out of the glare-critical area of point 9.

The twisting and pivoting of the light beam can now be brought about by the fact that the The reflector 22 carrying the light source of the low beam on one side in a movement in all directions Bracket 23 fixedly mounted and on the other opposite side of the reflector 22 by the Movement of a point of application 24 in the direction 25 and / or 26 or 27, the resultant from the the other two movements. This movement on the section 27 can by a Servomotor 32 are effected, which, for example, is connected directly to an adjusting screw with a low pitch, the reflector 22 adjusted in its two end positions so that in the one case a light distribution after F i g. 1 for the low beam and in the other case a light distribution according to FIG. 2 for the motorway dipped beam is achieved. The size of the angle enclosed by the two straight lines 25 and 27 is of depending on the type and size of the reflector.

The circuit diagram shown in Fig. 5 can be used to switch and adjust the headlight will.

The light is switched on by the main switch 28, whereby current from the battery 29 is over the selector switch 31 to the servomotor 32 and to the high-beam / low-beam switch 33 can flow. With the High / low beam switches 33 are either the The filament for the high beam or the low beam is switched on.

After preselection with the selector switch 31, the low beam reflector is set by the servomotor 32 in the End positions for low beam or motorway low beam, each limited by the limit switches 34 and 35 brought so that when you turn on the low beam with the switch 33 depending on the preselected position of the selector switch 31 normal or motorway dipped beam emerges.

In Fig. 6 shows a current junction that is switched in a similar manner with a high-beam / low-beam switch 33 and limit switches 34, 35, however, with a three-stage pull-push switch 36 with a Switch position for "Off" and two other switch positions is provided. In each of these two switch positions the high beam / low beam switch 33 is connected to voltage and with this switch 33 can Fernoder The low beam can be switched on. The type of low beam emitted depends on whether the Pull-push switch by setting the servomotor 32 via contact 37 or contact 38 Electricity is supplied. The end and switch-off positions for the servomotor result in turn from the limit switches 34 or 35. The pull-push switch 36 can also have one or two further switch positions for city and / or parking lights and designed accordingly as a four- or five-position switch be.

For this purpose 2 sheets of drawings

Claims (5)

Patent claims: 1. Headlight system for motor vehicles with two reflectors that can be pivoted into two end positions and in each case a light source fixed therein for at least the low beam, thereby characterized in that the reflector (22) in its first end position is the European asymmetrical Low beam (Fig. 1) and in its second end position a more far-reaching motorway low beam (Fig. 2) emits, with the light bundle of the motorway dipped beam to the side of the oncoming traffic moved and at the same time rotated clockwise in right-hand traffic in such a way that the The center of gravity (12) of the light beam is approximately below the horizontal point (9) and the horizontal branch (7 ') of the cut-off line runs approximately parallel to the glare line (11). 2. Plant according to claim 1, characterized in that the reflector (22) by approximately 3 ° in Is rotatable seen in the direction of travel. 3. Plant according to claim 1 or 2, characterized in that the reflector (22) on a Side stored in a holder (23) and is horizontally and vertically movable on the other side. 4. Installation according to one of claims 1 to 3, characterized in that the low beam headlights a servomotor (32) acting on a reflector (22) adjusts its direction of rotation reverse with a switch (33) and the limit switch (34, 35) in the intended Can be switched off end positions. 5. Plant according to claim 4, characterized in that the changeover switch (33) is part of a three-, four- or five-position switch (36) with the switch positions "high beam / low beam" and "high beam / motorway low beam" is.