DE10314874B4 - Headlight swivel device for a motor vehicle - Google Patents

Abstract

Headlight swivel device for a Motor vehicle with a control unit for detection and adjustment a desired swivel angle one over a certain angle range pivotable headlamp, wherein the control unit is configured such that at a determined target swivel angle (SW1), outside the Angular range, the set nominal swivel angle (SW2) can be reduced when the determined target swivel angle (SW1) is smaller, characterized in that the set desired swivel angle (SW2) according to a Ramp is reducible, the slope of the ramp set in such a way is that the characteristic curve (2) is always a straight line between the current operating point (b) and the zero position (0).

Description

The The invention relates to a headlight pivoting device for a Motor vehicle according to claim 1.

Headlamp swivel devices have long been known. Such a device is, for example, from the EP 0 780 823 A1 known. Here, the orientation of the headlamp is controlled by a controller that receives satellite-based information about the current location of the vehicle, information about the course and / or location of the road. Depending on this information, the headlights are controlled according to the curve of the road, so that the driver can easily see the road in the dark.

The Headlights are usually designed so that they only within a certain angle range can be adjusted. Does that drive Drivers in a strong turn, the headlights are to the edge adjusted by the adjustable angle range. When deflecting from the Curve the headlights are only panned again when the swivel preset in the angular range.

In the post-published DE 102 46 390 A1 a headlamp swivel device is disclosed, wherein the control device is configured such that at a determined target swivel angle, which is outside the angular range, the set target swivel angle is differently reduced depending on the steering speed.

For further technical environment is supplemented on the also subsequently published DE 102 46 356 A1 and DE 102 46 387 A1 directed.

task The invention is to improve a headlight pivoting device.

These The object is achieved by a Device solved according to claim 1. Advantageous developments are the objects the dependent Claims.

at the headlight pivoting device according to the invention for a Motor vehicle with a control unit for detection and adjustment a desired swivel angle one over a certain angle range swiveling headlamp is that control unit configured in such a way that at a determined target swivel angle, the outside of the adjustable angle range is the set target swivel angle can be reduced with decreasing determined target swivel angle is.

The control unit can either stand alone be or else be integrated into another controller. The target swivel angle can be determined in various ways, for example, depending on the steering wheel angle or calculated. As long as the determined target swivel angle is in the pivotable angle range of the headlamp, this target swivel angle set. If the control unit detects, e.g. in a tight corner a desired swivel angle, the outside of the angular range is an adjustment of this target swivel angle not possible anymore. As soon as the determined target swivel angle becomes smaller again, but still outside the adjustable angle range is, the set target swivel angle can be reduced.

advantageously, is the set target swivel angle reducible according to a ramp, wherein the slope of the ramp is set so that in the Zero position of the determined and set target swivel angle together fall.

is For example, the determined target swivel angle twice as large as the maximum setpoint swivel angle, the set swivel angle is set in the way that reduces at a reduction of the determined Target swivel angle by 2 degrees of the set target swivel angle 1 angle degree is reduced. Thus fall in the zero position, at the There is no deflection of the headlights, the determined and set Target swivel angle together again.

advantageously, is the set target swivel angle according to a predetermined map reducible. The map can be stored in the control unit. In the map is for every relationship from determined and set target swivel angle a ramp to reduce the set target swivel angle with decreasing determined target swivel angle specified.

Becomes reaches an upper limit of the determined target swivel angle, the to be many times bigger can, as the adjustable angle range is, remains the set Target swivel angle first are at its maximum nominal swivel angle, until the upper limit of the determined target swivel angle falls below again is. Then, the set target swivel angle in accordance with a characteristic from the map be reduced.

In the drawing, an embodiment of the invention is shown. The figure shows a map for setting the target swivel angle.

In the map is on the right value axis of the determined target swivel angle SW1 and on the high-value axis of the set target pivot angle SW2 shown.

The characteristic 1 provides an already known approach at z. B. a slight curve of the road. At the beginning (in a straight Straßenver-run) are determined and set target swivel angle SW1 and SW2 approximately in the zero position 0 , When turning into a slight curve, the determined target swivel angle SW1 increases. As long as the determined target swivel angle SW1 is smaller than a lower limit SW1 min, the target swivel angle SW2 becomes the characteristic 1 set. When deflecting from the curve from point c, the determined target swivel angle SW1 becomes smaller again. The set target swivel angle SW2 follows the characteristic curve 1 , until the setpoint value SW1 and SW2 determined and set back again in the starting position or zero position 0 are.

In the characteristic 2 , For example, in a stronger curve of the road, the set target swivel angle SW2 initially also follows the determined target swivel angle SW1 along the curve 1 until at point a it reaches an upper limit of the angular range for which the headlamp is pivotable. If the determined target swivel angle SW1 becomes even greater, the setpoint swivel angle SW2 can no longer follow. He stays at his maximum SW2max. The determined target swivel angle SW1 continues to rise up to the point b. At point b, the deflection process begins, the determined target swivel angle SW1 decreases again. The set target swivel angle SW2 is in accordance with the characteristic curve 2 reducible. The slope of the characteristic behaves in such a way that in the zero position 0 the determined and set target swivel angle SW1 and SW2 coincide.

Regardless of the even active operating point within the map, it is always ensured that when reducing the determined target swivel angle SW1, ie when returning, the characteristic always a straight line between the current operating point, z. B. at point b and the zero position 0 represents.

Will when returning before reaching the zero position 0 , For example, at point d, again directed into a curve, the target pivot angle is increased again, which is due to the characteristic 3 is shown. In this case, the target swivel angle corresponding to the characteristic 3 set. At point e, the set target swivel angle can no longer be increased, it goes into the curve 2 above. The headlight movement thus always follows the actual course of the curve.

Claims (2)

Headlamp swivel device for a motor vehicle with a control unit for determining and setting a desired swivel angle of a headlight which can be swiveled over a certain angular range, wherein the control device is configured such that at a determined desired swivel angle (SW1), which is outside the angular range, the set target swivel angle (SW2) can be reduced as the determined target swivel angle (SW1) becomes smaller, characterized in that the set desired swivel angle (SW2) can be reduced according to a ramp, wherein the slope of the ramp is set such that the adjusting characteristic ( 2 ) always a straight line between the current operating point (b) and the zero position ( 0 ). Device according to claim 1, characterized that the set target swivel angle (SW2) according to a given map is reducible.