AT517135A1 - Headlights for vehicles, in particular for single-track vehicles - Google Patents

Abstract

Headlamps for vehicles, in particular for single-lane motor vehicles, the headlamp having an apron light module (1), which apron light module (1) emits light to form a first light distribution (2) in a region in front of the apron light module (1) Additional light module (3), which additional light module (3) emits light to form a second light distribution (41, 42) in a region in front of the additional light module (3), wherein the first light distribution (2) is substantially homogeneous, and a rectilinear upper apron HD boundary (5), and wherein the first light distribution (2) adjoins the x-axis (X) from below, and wherein the second light distribution (4) has one, two or more light intensity maxima (LM), wherein at two or more light intensity maxima no two light intensity maxima (LM) coincide.

Description

Headlights for vehicles, in particular for single-track vehicles

The invention relates to a headlamp for vehicles, in particular for single-track motor vehicles, the headlamp having an apron light module, which apron light module radiates light to form a first light distribution in a region in front of the apron light module and an additional light module, which additional light module Emits light to form a second light distribution in a region in front of the additional light module includes.

Furthermore, the invention relates to a vehicle with at least one such headlight.

In order to increase driving safety during evening and night driving, headlights with special functions are used in motor vehicles. As a headlamp with a cornering function (often simple - cornering light) refers to a headlamp whose lighting direction can be adapted to the road. Such an adaptation is particularly advantageous when driving on winding roads, especially as a result of this a better field of view is obtained when cornering.

In single-track vehicles, another factor comes into play, namely the inclination of the motor vehicle when cornering. As is known, a one-lane vehicle, for example, a motorcycle when cornering in the curve, whereby the light emitted by the headlight image is also brought into an oblique position.Herein, it is desirable that in a headlamp for single-lane motor vehicles with a cornering function, and the inclination A roll angle compensation system is advantageous for two reasons: on the one hand, the road is better illuminated for the motorcyclist and, on the other, the oncoming road users are less dazzled, with the advantages of roll compensation systems even at low slopes to the fore.

In the roll angle compensation systems known from the prior art, which have been produced, for example, by BMW, the headlights consist of a very complex dynamic rotary mirror system and, for example, a xenon burner (HID lamp) as the light source. The rotary mirror system is controlled by stepper motors. The complex technical implementation of such mobile systems is disadvantageous and of

Motor vehicle manufacturers often undesirable because of the implementation of a large installation space is needed. However, this is often not the case especially for single-lane motor vehicles, which is why it is necessary to resort to lenses with a small focal length and small diameter and thus the luminous flux on the road can only be achieved by a lower efficiency. In addition, the design is limited by the mirror. Inserting LEDs is also difficult because heavy heatsinks are required for multiple light emitting LEDs.

The described disadvantages of the prior art should be eliminated. It is therefore an object of this invention to provide a headlight, realized with the cornering light function and especially roll angle compensation function and structural and stylistic requirements of customers can be accommodated.

The measurement and analysis of a light image emitted by a headlight is done by a measuring screen arranged perpendicular to the optical axis of the headlight and illuminated by the headlight at a certain distance in front of the headlight. The illumination creates a light distribution on the screen. In order to specify the position of a point on the screen requires a coordinate system. In this specific case (headlamps for single-lane vehicles) a special orthogonal pair of coordinates - x-axis and y-axis - is defined, with the x-axis at the statutory reduction of 0.57 ° (in ECE space and 0.40 ° in the US) is below the usual horizontal or hh line. The point position on the screen is given in degrees. The light intensity values are recorded in the form of a two-dimensional distribution and displayed, for example, as an isolux line diagram (isolux lines). The transitions from brightly lit to dimmed light distribution areas are called light-dark boundaries (HD boundaries).

The above object is achieved with a headlamp mentioned above according to the invention that the first light distribution is substantially homogeneous and has a rectilinear upper apron HD boundary, and wherein the first light distribution adjacent to the x-axis from below, and wherein the second light distribution has one, two or more light intensity maxima, and wherein at two or more light intensity maxima no two light intensity maxima coincide.

The requirement of the homogeneity of the first light distribution is the requirement of a substantially constant luminance in the light image, ie. within the first light distribution, the same. This change can be quantified by gradient values, for example.

It is particularly advantageous that the second light distribution has a high beam distribution and / or a bend light distribution, i. a dimmed, adapted to a specific inclination of the single-track motor vehicle light distribution is.

The term "curve light distribution" refers to a partial light distribution whose at least one maximum light intensity lies at a specific distance away from the y-axis of the straight-ahead motorbike, whereby a classical low-beam distribution is formed in a local coordinate system is at least a few degrees, for example 1 ° -10 °, and can be calculated using the following formula:

where: Au - the distance, h - the installation height of the headlamp, d -screen distance (equal to 25 meters), and a - the cornering of the single-lane vehicle. In addition, the necessary height difference for the installation of the additional additional modules can be calculated so that the horizontal position (lowering) of the light distribution remains constant. Whether the at least one light intensity maximum lies to the right or left of the y-axis depends on the type of cornering. In a left turn, this is at least a light intensity maximum left of the y-axis, in a right turn right.

It is advantageously provided that the additional light module is arranged fixedly and / or immovably in a spotlight housing.

This embodiment has the advantage that the invention is implemented without the use of movable elements. Above all, a space-technical advantage comes to the fore.

The additional light module comprising a primary partial light module which radiates primary partial light module light to form a primary partial light segment, a first secondary partial light module group, which first secondary partial light module group comprises one, two or more secondary partial light modules, and a second secondary partial light module group, which second secondary partial light module group comprises one, two or more secondary partial light modules, each secondary partial light module of the first and / or the second secondary partial light module group having light for forming a secondary partial light Segments radiates, and wherein the primary partial light segment and each secondary sub-light segment each have a maximum light intensity, has proved to be particularly useful.

It is particularly advantageous to ensure that the primary sub-light segment has a straight upper HD boundary and adjacent to the x-axis from below and meets the legal requirements of ECE R113.

It can also be provided that the primary partial light segment has an upper polygon-shaped HD boundary and preferably meets the legal requirements of ECE R112.

In addition, it is expedient that the primary partial light module and each secondary partial light module are individually controllable.

It is particularly advantageous that, when installed in a vehicle state of the additional light module, the switching on / off of the primary partial light module and the individual secondary partial light modules is controllable depending on the tilt of the vehicle.

It has proven to be expedient that the number of secondary partial light modules in the first secondary partial light module group is equal to the number of secondary partial light modules in the second secondary partial light module group.

It is advantageous that the switching on of all the secondary partial light modules of the first and the second secondary partial light module group generates a segmented second light distribution symmetrical with respect to the y axis.

It is advantageous that, when all the partial light modules are switched on, each partial light segment at least partially overlaps all other partial light segments.

In a preferred embodiment of the invention, it is provided that the additional light module is designed and / or associated with the headlamp such that each maximum light intensity is arranged on a measuring screen arranged at a distance from the apron light module perpendicular to the optical axis of the apron light module connected to the HV point determines a half-line, which half-line emanates from the HV point and with the positive x-axis, ie with that "half" of the x-axis extending from the origin in the positive direction (i.e., in the direction of the arrow), an angle between 0 ° and 180 °.

It is expedient that the maximum light intensity of a secondary partial light segment generated by a secondary partial light module of the first secondary partial light module group is connected to a measuring screen arranged at a distance from the apron light module perpendicular to the optical axis of the apron light module with the HV point a half-line determines which half-line emanates from the HV point and with the positive x-axis forms an angle between 0 ° and 90 °.

In addition, it has proven expedient that the maximum light intensity of a secondary partial light segment generated by a secondary partial light module of the second secondary partial light module group be at a distance from the front-end light module perpendicular to the optical axis of the front-end light module arranged measuring screen connected to the HV point determines a half-line, which half-line emanating from the HV point and with the positive x-axis forms an angle between 90 ° and 180 °.

Furthermore, it is advantageously provided that all light intensity maxima on a measuring screen located at a distance from the apron light module perpendicular to the optical axis of the apron light module can be connected by a curve that can be differentiated twice, preferably connectable by a parabola, wherein the Vertex of the parabola lies in the HV point, the y-axis forms the symmetry axis of the parabola and the parabola is open in the positive direction of the y-axis.

At this point it is appropriate to discuss how the above-mentioned roll angle compensation function can be realized. The maxima of the primary sub-light segment and all secondary sub-light segments lie on half-lines, which include different angles with the positive x-axis. Depending on the inclination of the motor vehicle, the primary partial light module and / or one of the secondary partial light module is connected to the apron light module. The light distribution resulting from the overlap of the first light distribution and of the primary and / or one, two or more secondary partial light segments increases the driver's field of view when the motor vehicle is inclined during cornering. To increase the homogeneity of the overall light distribution emitted by the headlamp, the primary and the individual secondary partial light segments are arranged overlapping. Due to the number of secondary partial light modules, the resolution of the second light distribution can be increased.

In the same way, it is also possible to realize a high-beam function with the high-beam distribution "cornered." When the motorcycle is traveling straight ahead (the 0 ° inclination), a conventional high-beam module is switched on, the maximum in the HV In the cornering position (tilt of the motor vehicle at a different angle from 0 °), however, can be realized by the addition of at least one of the secondary partial light modules a high-beam function in that all maxima of the emitted light distribution to the right or left of the If, for example, the inclination of the motor vehicle in the curve is 10 °, then a secondary partial light module is additionally switched on, which would normally only be switched on at 20 °, and thereby radiated effectively the high-beam distribution curve always an additional secondary partial light module as High beam to be switched. In the extreme oblique position, which is for example 25 °, an additional secondary partial light module of the first secondary partial light module group and the second secondary partial light module group is still arranged that makes the high-beam function at the extreme inclination (for example, 25 °) feasible , This allows the driver at all times the maximum visibility in the direction of travel. The dimmed light distribution is adjusted in the same way to the tilt.

It can be provided that the apron light module at least one light source comprises a reflector associated with the at least one light source, preferably a free-form reflector with similarly acting facets.

The facets of a free-form reflector are usually arranged like a matrix. Here, a matrix-like arrangement means that the facets are arranged in n (n = 1, 2, 3, ...) rows and m (m = 1, 2, 3, ...) columns. In this case, each facet can be rectangular, for example.

In addition, it is advantageously provided that the at least one light source is designed as a lamp, for example an incandescent lamp corresponding to the standard ECE-R37, or a gas discharge lamp corresponding to the standard ECE-R99.

Moreover, it is advantageous that the at least one light source is formed from one, two or more LEDs.

It is expedient that the apron light module comprises at least one light source, preferably one, two or more LED light sources, and one lens associated with the at least one light source, preferably a collimator lens, for example a TIR lens body.

Use of this lighting technology concept has the advantage that the emitted light distribution in particular has a high homogeneity.

In a preferred embodiment it is provided that the primary partial light module and the secondary partial light modules each comprise at least one light source and one of the at least one light source to ordered reflector and / or one of the at least one light source associated lens, preferably a free-form reflector.

Furthermore, it is expedient that the at least one light source is designed as a lamp, for example an incandescent lamp corresponding to the standard ECE-R37 or a gas discharge lamp corresponding to the standard ECE-R99.

It has proved to be expedient that the at least one light source is formed from one, two or more LEDs, which LEDs are individually controllable.

The present invention will now be further illustrated by way of preferred non-limiting embodiments with reference to the drawings. It shows:

1 shows a schematic arrangement of the light modules in a headlight housing,

2 shows the homogeneous first light distribution with the straight-line HD boundary,

3 shows an overlap of the first and the second light distribution, wherein the second light distribution is generated by switching on the primary partial light module,

4 shows an overlap of the first and the second light distribution, wherein the second light distribution is generated by switching on the primary partial light module and all the secondary partial light modules,

5 a suitable for cornering in extreme inclination of 25 ° high beam distribution,

6 shows a secondary partial light segment with a light intensity maximum, which forms a half-line with the HV point,

7 shows a connectable by a smooth curve arrangement of light intensity maxima,

8 shows a motorcycle in a left turn position with a switched-on headlight according to the prior art, which headlight dimmers a low beam distribution, and

9 shows a motorcycle in a left-hand bend position with a switched-on headlight according to the invention with a roll-angle compensation function, which headlight dimmers a dipped beam distribution that complies with the curve.

First, reference is made to FIG. 1. 1 shows a schematic arrangement of light modules 1, 3 in a spotlight housing 6. In this case, the additional light module 3 comprises the primary partial light module PL and two secondary partial light module groups STL1, STL2. Each secondary sub-light module group consists of one, two, three or more secondary sub-light modules, which in this specific embodiment is in each case two secondary sub-light modules per secondary sub-light module group. The secondary partial light modules 11, 12 of the first secondary partial light module group STL 1 and the secondary partial light modules 21, 22 of the second secondary partial light module group STL 2 are arranged to form a corresponding light distribution in the left or right inclined position of the motor vehicle.

2 shows first light distribution 2 dimmed by the apron light module 1. The first light distribution 2 has a straight-line HD boundary 5 and is essentially homogeneous. The desired homogeneity of the first light distribution can be achieved, for example, by using TIR lenses mentioned in the introduction.

In order to produce a law-compliant total light distribution, which is designed especially for cornering, the first light distribution is overlapped with the second emitted by the additional light module 3 light distribution. Since the additional light module comprises one, two or more individually controllable light modules, the shape of the second light distribution can vary greatly, depending on which individual light modules of the additional light module are switched on or off. Fig. 3 shows e.g. an overlap of the first and the second light distribution, wherein the second light distribution is generated by switching on the primary partial light module and consists only of a primary partial light segment PTS.

FIG. 4 shows suitable low-beam light distributions for cornering, which are formed by an overlap of the first light distribution 2 and the second light distribution 41. In this case, the second light distribution 41 is generated in FIG. 4 by switching on the primary partial light module PL and all secondary partial light modules 11, 12, 21, 22. In order to adapt the second light distribution 41 of the inclined position of the motor vehicle, some of the individual secondary partial light modules are switched off or dimmed in their intensity. For example, For generating the second light distribution in a right extreme inclination (right turn), the apron light module 1, the primary partial light module PL and all the secondary partial light modules 21, 22 of the second secondary partial light module group are switched on. Due to the overlap of the individual emitted light distributions, the first light distribution 2, the primary partial light segment and the secondary partial light segments 32, 34, the entire (dimmed) light distribution is generated. In addition, FIG. 4 shows different non-colliding light intensity maxima of individual partial light segments.

The above-described process can also be used to generate a high beam distribution with a cornering function. Fig. 5 shows beispielswese a suitable for cornering in the exemplary extreme inclination of 25 ° high beam distribution, which is formed as an overlap of the first light distribution 2 and the second suitable for cornering light distribution 42.

In order to be able to generate the appropriate secondary sub-light segments, care must be taken to ensure that the maximum light intensity of each individual secondary sub-light segment lies apart from the y-axis Y. As a result, every single secondary partial light maximum is placed in the curve when cornering, thus illuminating the curve. FIG. 6 shows a secondary partial light segment with a maximum light intensity LM, which lies to the right of the y-axis Y and forms a half-line S with the HV point HV. The half-line S with the positive x-axis X encloses an angle w. The included angle w is a characteristic of the relevant secondary partial light module and is used depending on the tilt of the motor vehicle to turn the secondary partial light module on or off.

FIG. 7 shows an overlap of the first 2 and the second light distribution formed by a primary partial light segment and a plurality of secondary partial light segments. In this case, the second light distribution with respect to the y-axis Y is symmetrical and has a plurality of light intensity maxima LM. These light intensity maxima LM lie on a smooth, for example twice differentiable, curve 8, preferably on a parabola. Since the inclination of the motor vehicle can be described by such a curve (a movement of the center of mass of the motor vehicle will draw such a curve), the position of the light intensity maxima LM can be adapted to the inclination of the vehicle.

Such an adaptation is discussed in FIGS. 8 and 9. Fig. 8 shows a motorcycle in a left turn position with a switched-on headlamp according to the prior art, which headlights dimming a low beam distribution AL and has no roll angle compensation function. It can be seen that during a left turn a large area DB of the road ahead of the motorcycle remains unlit. In the example shown, the opposite lane for the motorcyclist always remains dark. In Fig. 9, a motorcycle in a left turn position with a switched-on headlamp according to the invention with a roll angle compensation function, which headlights dimming a kurvenfahrtkonforme low-beam distribution shown. In this case, in addition to the apron light module 1, which generates the first light distribution 2, the first secondary partial light module 11 of the first secondary partial light module group STL1 is turned on, which secondary partial light module 11 dimmers a secondary partial light segment 31. By the first light distribution 2 alone, the opposite lane remains dark as well as in a headlamp according to the prior art (FIG. 8). The function of illuminating the opposite lane in a cornering of the motorcycle is taken in this case by switching on the secondary sub-light module 11 of the first secondary sub-light module group STL2, thereby realizing the roll angle compensation function.

The invention has been described with reference to two secondary partial light modules per secondary partial light module group and a primary partial light module, since this embodiment is particularly easy to implement in the existing installation space situation. In principle, the invention but also in connection with a different number (1, 2, 3, 4, 5, 6, etc.) to partial light modules, which includes the additional light module, feasible, creating a finer gradation and an advantageous adaptation to the corresponding skew can be achieved.

Claims (22)

claims 1. Headlight for vehicles, in particular for single-track motor vehicles, wherein the headlight an apron light module (1), which apron light module emits light to form a first light distribution (2) in an area in front of the apron light module, an additional light module ( 3), which additional light module radiates light to form a second light distribution (41, 42) in a region in front of the additional light module, wherein the first light distribution (2) is substantially homogeneous and a rectilinear upper apron HD boundary (5 ), and wherein the first light distribution adjoins the x-axis (X) from below, and wherein the second light distribution (4) has one, two or more light intensity maxima (LM), wherein at two or more light intensity maxima none two light intensity maxima (LM) coincide. 2. Headlight according to claim 1, characterized in that the second light distribution is a high beam distribution (42) and / or a dimmed curve light distribution (41). 3. Headlight according to claim 1 or 2, characterized in that the additional light module (3) is arranged fixed and / or immovable in a headlight housing. 4. Headlight according to one of claims 1 to 3, characterized in that the additional light module (3) comprises a primary partial light module (PL), which primary partial light module emits light to form a primary partial light segment (PTS), a first secondary partial light module group (STL1), which first secondary partial light module group comprises one, two or more secondary partial light modules (11, 12), and a second secondary partial light module group (STL2), which second secondary partial light module Group comprises one, two or more secondary partial light modules (21, 22), wherein each secondary partial light module of the first and / or the second secondary partial light module group light to form a secondary partial light segment (31, 32, 33, 34 ), and wherein the primary sub-light segment and each secondary sub-light segment each have a maximum light intensity. 5. Headlight according to claim 4, characterized in that the primary partial light segment (PTS) has a straight upper HD boundary and adjacent to the x-axis from below and preferably meets the legal requirements of ECE R113. 6. Headlight according to claim 4, characterized in that the primary partial light segment has an upper polygonal-shaped HD boundary and preferably meets the legal requirements of ECE R112. 7. Headlight according to one of claims 4 to 6, characterized in that the primary partial light module (PL) and each secondary partial light module (11, 12, 21, 22) are individually controllable. 7. Headlight according to claim 6, characterized in that when installed in a vehicle state of the additional light module, the switching on / off of the primary partial light module (PL) and the individual secondary partial light modules (11, 12, 21, 22) each is controllable according to tilt of the vehicle. 8. Headlight according to one of claims 4 to 7, characterized in that the number of secondary partial light modules in the first secondary partial light module group (STL1) equal to the number of secondary partial light modules in the second secondary partial light module group (STL2) is. 9. Headlight according to one of claims 4 to 8, characterized in that the switching on of all the secondary partial light modules (11, 12, 21, 22) of the first and the second secondary partial light module group (STL1, STL2) a segmented with respect to the y -Axis (Y) produces symmetrical second light distribution (41). 10. Headlight according to one of claims 4 to 9, characterized in that at the same time switching on all partial light modules each partial light segment overlaps all other partial light segments at least partially. 11. Headlight according to one of claims 1 to 10, characterized in that the additional light module is designed and / or the headlamp is assigned such that each maximum light intensity (LM) on a at a distance from the apron light module perpendicular to the optical axis of the apron light module arranged messschirm connected to the HV point (HV) determines a half-line, which half-line (S) emanating from the HV point and the positive x-axis (X) an angle (w) between 0 ° and 180 °. 12. Headlight according to one of claims 4 to 11, characterized in that the maximum light intensity of a secondary partial light module of the first secondary partial light module group generated secondary partial light segment at a distance from the apron light module perpendicular to the optical axis of the front-end light module arranged Messschirm connected to the HV point a half-line determines which half-straight line from the HV point and with the positive x-axis (X) forms an angle between 0 ° and 90 ° (w). 13. Headlight according to one of claims 4 to 12, characterized in that the maximum light intensity of a secondary partial light module of the second secondary partial light module group generated secondary partial light segment at a distance from the apron light module perpendicular to the arranged optical axis of the apron light module arranged Messschirm connected to the HV point a half-line, which half-line from the HV point and with the positive x-axis (X) forms an angle (w) between 90 ° and 180 °. 14. Headlight according to one of claims 1 to 13, characterized in that all light intensity maxima (LM) on a arranged at a distance from the apron light module perpendicular to the optical axis of the apron light module screen by a twice differentiable curve (8) are connectable, preferably connected by a parabola, wherein the vertex of the parabola in the HV point (HV), the y-axis (Y) forms the axis of symmetry of the parabola and the parabola in the positive direction of the y-axis (Y) open is. 15. Headlight according to one of claims 1 to 14, characterized in that the apron light module (1) comprises at least one light source of the at least one light source associated reflector, preferably a free-form reflector with the same effect facets. 16. Headlight according to claim 15, characterized in that the at least one light source as a lamp, for example, a standard ECE-R37 corresponding incandescent lamp or a standard ECE-R99 corresponding gas discharge lamp is formed. 17. Headlight according to claim 15 or 16, characterized in that the at least one light source is formed from one, two or more LEDs. 18. Headlight according to one of claims 1 to 14, characterized in that the apron light module (1) at least one light source, preferably one, two or more LED light sources, and one of the at least one light source associated lens, preferably a collimator lens, for example a TIR lens body. 19. Headlight according to one of claims 4 to 18, characterized in that the primary partial light module (PL) and the secondary partial light modules (11, 12, 21, 22) in each case at least one light source and the at least one light source associated reflector and / or a lens associated with the at least one light source, preferably a free-form reflector. 20. Headlight according to claim 19, characterized in that the at least one light source as a lamp, for example, a standard ECE-R37 corresponding incandescent lamp or a standard ECE-R99 corresponding gas discharge lamp is formed. 21. Headlight according to claim 19 or 20, characterized in that the at least one light source is formed from one, two or more LEDs, which LEDs are individually controllable. 22. Vehicle with at least one headlight according to one of claims 1 to 21.