Motor vehicle

Abstract

The invention relates to a motor vehicle (100), wherein the motor vehicle (100) is a single-track motor vehicle or a multi-track motor vehicle with tilting technology, the motor vehicle (100) having a longitudinal axis (x) and a transverse axis (y), the longitudinal axis (x) corresponding to the direction of travel of the motor vehicle (100) when the motor vehicle (100) is travelling in a straight line and the transverse axis (y) corresponding to the direction of extension of the motor vehicle (100) perpendicular to the longitudinal axis (x) along the carriageway, the motor vehicle (100) comprising a headlamp (1) for producing a predefined light distribution (LV) in front of the motor vehicle (100) and a first sensor device (2) for detecting the speed (v) of the motor vehicle (100) and a second sensor device (3) for detecting the tilt (<) of the motor vehicle (100) about its longitudinal axis (x). A control device (4) is provided in the motor vehicle in order to control the headlamp (1) in operation such that the position of the centre of intensity (LS) of the predefined light distribution (LV) is changed in dependence on the detected speed (v) and the detected tilt (<) of the motor vehicle (100) relative to the motor vehicle (100), the centre of intensity (LS) moving along the transverse axis (y) in the direction in which the motor vehicle (100) is tilted as the speed (v) of the motor vehicle (100) decreases when the tilt (<) of the motor vehicle (100) is constant and the centre of intensity (LS) moving along the transverse axis (y) in the direction of the tilt of the motor vehicle (100) as the tilt of the motor vehicle (100) increases when the speed of the motor vehicle (100) is constant.

Description

Technical Field

[0001] This invention relates to a motor vehicle, wherein the motor vehicle is a single-track motor vehicle, such as a motorcycle, or a multi-track, and especially double-track, motor vehicle with tilting technology. The motor vehicle with tilting technology is characterized in that, when traveling on a curve, it tilts about its longitudinal axis in a manner similar to a single-track vehicle. Background Technology

[0002] As is known in the prior art, the light distribution of a motorcycle headlight is adjusted based on the motorcycle's tilt position (see, for example, documents EP3187399B1 and DE102018209061A1). By adjusting the light distribution, improved illumination of curves traversed by the motorcycle is achieved. The speed at which the motorcycle travels around the curve is not considered here. Summary of the Invention

[0003] The objective of this invention is to provide a single-track motor vehicle or a multi-track motor vehicle with tilting technology, wherein the headlights ensure improved illumination when driving on curves.

[0004] This task is accomplished by a motor vehicle as described in claim 1. Improvements to the invention are defined in the dependent claims.

[0005] The motor vehicle according to the invention is a single-track motor vehicle, and preferably a motorcycle. Alternatively, the motor vehicle according to the invention can also be a multi-track motor vehicle with tilting technology, and preferably a double-track motor vehicle. The motor vehicle according to the invention has a longitudinal axis and a transverse axis, wherein, when the motor vehicle is traveling in a straight line, the longitudinal axis corresponds to the direction of travel of the motor vehicle, and the transverse axis corresponds to the direction of extension of the motor vehicle along the lane perpendicular to the longitudinal axis. The longitudinal axis and the transverse axis, as well as the vertical axis described below, are determined with respect to the motor vehicle, i.e., they have a fixed position relative to the motor vehicle and follow the movement of the motor vehicle.

[0006] The motor vehicle includes headlights for generating a predetermined light distribution in front of the motor vehicle, a first sensor device for detecting the speed of the motor vehicle, and a second sensor device for detecting the tilt or rotation (i.e., roll angle) of the motor vehicle about its longitudinal axis.

[0007] A control device is provided in the motor vehicle according to the invention to manipulate the headlights during operation such that the position of the center of gravity of the predetermined light distribution intensity changes relative to the detected speed and tilt of the motor vehicle. In other words, both the speed and tilt of the motor vehicle are taken into account when adjusting the light distribution. Here, when the tilt of the motor vehicle is constant, the center of gravity of the predetermined light distribution intensity moves along the lateral axis in the direction of the vehicle's tilt as the speed of the motor vehicle decreases. Furthermore, when the speed of the motor vehicle is constant, the center of gravity moves along the lateral axis in the direction of the vehicle's tilt as the tilt of the motor vehicle increases.

[0008] This invention is based on the understanding that, for optimized illumination of curves using a vehicle's headlights, not only the vehicle's tilt position but also its speed is relevant. In particular, according to this invention, curves are well illuminated even when the turning radius (i.e., narrow curves) is small.

[0009] In a particularly preferred embodiment, the change in the position of the center of gravity of the predetermined light distribution intensity is further designed such that, when the vehicle's tilt is constant, the center of gravity moves upward along the vertical axis extending perpendicular to the vehicle's longitudinal and transverse axes as the vehicle's speed decreases, and when the vehicle's speed is constant, the center of gravity moves upward along the vertical axis as the vehicle's tilt increases. This provides particularly efficient illumination for the driver of the vehicle.

[0010] In another preferred embodiment, the control device for a motor vehicle according to the invention is designed such that the control device calculates the turning radius of a curve traveled by the motor vehicle from the detected speed and detected tilt of the motor vehicle, and determines the driver's perspective based on the turning radius, wherein the perspective is the displacement angle of the center of gravity of the light distribution relative to the longitudinal axis of the motor vehicle.

[0011] In a particularly preferred variant of the above embodiment, a sight distance is predetermined for the predetermined light distribution. This sight distance describes the time required for the vehicle, traveling at a detected speed, to reach a focal point along the direction of the viewing angle. The focal point corresponds to a point on the curve traveled by the vehicle along the direction of the viewing angle. The control device is designed such that it determines the driver's viewing angle from the sight distance and the turning radius. Determining an appropriate sight distance is a matter of professional operation. For example, 2 seconds might be defined as the sight distance. If necessary, the sight distance can also be adjusted based on current driving parameters or the resulting current driving conditions. Furthermore, if necessary, the sight distance can be adjusted based on the type of predetermined light distribution produced by the headlights.

[0012] Depending on the design, the predetermined light distribution generated by the headlights of the motor vehicle can be different. For example, the predetermined light distribution can be high beam or low beam, or implementations of these light types. Such implementations are, for example, combinations of high beam or low beam with city lights or rural road lights or highway lights.

[0013] In another embodiment, the pre-defined light distribution in the motor vehicle can be switched between multiple light distributions, for example, between high beam and low beam as described above, or between different embodiments of high beam and / or low beam. Preferably, the width of the light distribution about the horizontal axis of the motor vehicle is different among the multiple light distributions.

[0014] According to the design, different techniques can be used to modify the light distribution of the headlights of the motor vehicle according to the invention. In a preferred variant, the headlights are matrix headlights composed of multiple light sources, wherein the position of the center of gravity of the intensity of the predetermined light distribution is changed by altering the brightness of the light sources. Attached Figure Description

[0015] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0016] in: Figure 1 A schematic top view of a motorcycle according to an embodiment of the present invention is shown; Figure 2 Shown by Figure 1 A diagram illustrating the curves traveled by a motorcycle, to illustrate the amount of displacement of the center of gravity used in calculating the intensity of light distribution according to one embodiment of the invention; and Figures 3 to 6 Demonstrates different speeds and inclines Figure 1 A diagram illustrating the light distribution generated by the headlights of a motorcycle. Detailed Implementation

[0017] Figure 1 An embodiment of the motorcycle according to the invention is shown from above in a schematic top view. Figure 1 The figures also show a Cartesian coordinate system, where the x-axis represents the longitudinal axis of the motorcycle, the y-axis represents the transverse axis, and the z-axis represents the vertical axis. These axes are defined relative to the motorcycle and move with it. The direction of the longitudinal axis corresponds to the motorcycle's direction of travel when traveling in a straight line.

[0018] The motorcycle 100 includes a front wheel 101, a rear wheel 102, and a frame 103. Furthermore, the motorcycle includes a headlight 1, the light distribution of which depends not only on the motorcycle's tilt or angled position about its longitudinal axis. (That is, the angle of rotation about the longitudinal axis relative to the transverse axis when traveling in a straight line without tilt) varies, and depends on the speed v of the motorcycle. The light distribution of the high beam of the motorcycle is exemplarily considered below.

[0019] In the embodiment described herein, a matrix headlight is used as headlight 1. The matrix headlight includes multiple LEDs, wherein the light distribution can be altered according to the motorcycle's speed and tilt position by changing the brightness of the LEDs or by selectively switching specific LEDs on and off. A sensor device 2 is provided to detect the motorcycle's speed v, and to detect tilt... Sensor device 3 is provided. The two sensor devices are shown only schematically. Similarly, the control device 4 of the motorcycle 100, which depends on speed v and tilt, is also shown only schematically. The light distribution generated by the headlight 1 is appropriately adjusted.

[0020] An important aspect of the present invention is that the center of gravity of the intensity of the light distribution generated by the headlight 1 depends not only on the velocity v but also on the tilt. To achieve an appropriate displacement. To determine this displacement, the control device 4 calculates the viewing angle α, which in particular depends on the turning radius of the curve traveled by the motorcycle, as follows... Figure 2 As explained.

[0021] Figure 2 The turning radius *r* of the curve traveled by the motorcycle 100 is shown from above in a top-down view. The motorcycle is only schematically represented here as a dashed rectangle. When traveling through the curve, gravity acts on the motorcycle, as given below: .

[0022] Here, m represents the mass of the motorcycle, and g corresponds to the acceleration due to gravity.

[0023] Additionally, the centripetal force acts towards the center of the curve being traveled. This centripetal force is given as follows: .

[0024] Here, v represents the currently detected speed of the motorcycle, m corresponds to the mass of the motorcycle, and r is the turning radius, which is in... Figure 2 It is shown as a dashed line in the middle.

[0025] By establishing a proportional relationship between the above quantities, the following quantities are obtained: .

[0026] Here, This represents the tilt or tilt position angle of the motorcycle. By transforming the above formula (3), the current turning radius is obtained as follows: .

[0027] Using the above formula, the control device 4 uses the detected speed v and the detected tilt. Calculate the turning radius.

[0028] In the next step, the control device 4 determines the point on the driving line (i.e., the curve being traveled) where the driver's focus FP is located. Here, a predetermined sight distance BW is taken into consideration, which describes the time required for the motorcycle to reach the focus FP while traveling at the current speed. Properly determining the sight distance is a matter of professional operation. For example, the sight distance BW can be determined as 2 seconds. If necessary, the sight distance can be determined based on driving conditions.

[0029] The line-of-sight distance (BW) is closely related to the observation direction (BR), which is the direct distance from the motorcycle's current position to the focal point (FP). Figure 2 The observation direction BR is presented in the image. The observation direction is equal to the product of the motorcycle's current speed v and the line-of-sight distance BW, i.e., applicable to: .

[0030] The angle α can be calculated in a known manner from the observation direction BR and the turning radius r. Figure 2 The aforementioned perspective is also presented in this context. Specifically, the following relationship applies to this: .

[0031] Therefore, using the formula (6) above, the viewing angle α is obtained from the previously calculated turning radius r and the viewing direction BR, wherein the viewing direction is derived from the motorcycle's speed v and the line-of-sight distance BW. In the embodiment described here, the viewing angle α corresponds to an angle at which the center of gravity of the light distribution (i.e., the intensity center of gravity) shifts inward toward the curve (i.e., toward the motorcycle's tilt direction) when the motorcycle is in a tilted position or traveling in a curve.

[0032] exist Figures 3 to 6 The diagram illustrates an example of the high beam light distribution (LV) of the motorcycle at different speeds and tilt positions in the driver's line of sight. Polygonal segments (SG) are shown in all the figures, indicated only partially by the reference numerals for clarity. These segments correspond to individual groups of LEDs in the matrix headlight. Each group of LEDs is individually controlled by the control device 4 to change its brightness. Therefore, different brightness values ​​are produced for each segment (SG). Figures 3 to 6 In the diagram, the brightness of each segment SG is represented by points within that segment, with higher point density within a segment indicating greater brightness. Furthermore, the centroid LS of the light distribution LV is indicated by white dots.

[0033] Figure 3 This shows the motorcycle traveling at a speed of 30 km / h in a straight line (i.e., without tilt and therefore...). =0°) Light distribution LV during driving. In this case, the center of gravity LS of the light distribution LV is located at the center of the motorcycle.

[0034] Figure 4 This shows the angle when the motorcycle is at a speed of v=30km / h. The situation at a tilt of 20°. As can be seen, compared to... Figure 3 In contrast, the center of gravity of the light distribution LV shifts significantly to the right and inwards towards the curve. This is because a small speed results in a small turning radius or a narrow curve, causing the center of gravity of the light to shift further inwards towards the curve.

[0035] Figure 5 The angle at the tilt position is the same at a speed of v=100km / h. Light distribution at 20° (LV). Due to the high speed, the turning radius is... Figure 4 Compared to a larger size, this causes the light distribution to move more towards the center of the motorcycle.

[0036] exist Figure 6 In the middle, at the same tilt angle, At a radius of 20°, the motorcycle's speed v further increases to 150 km / h. As can be seen, this causes the light distribution to shift further towards the center of the motorcycle.

[0037] according to Figures 3 to 6 The relationship defined in claim 1 is derived, according to which, when the motorcycle's tilt is constant, the position of the center of gravity of the light distribution intensity shifts along the horizontal axis toward the direction of the motorcycle's tilt as the motorcycle's speed decreases. Furthermore, the light distribution is adjusted such that, when the motorcycle's speed is constant, the center of gravity of the light distribution intensity shifts toward the direction of the motorcycle's tilt as the motorcycle's tilt increases.

[0038] To ensure exceptionally good illumination of the driving lane, according to Figures 3 to 6 When the motorcycle's tilt is constant, the center of gravity of the light distribution intensity shifts upward along the motorcycle's vertical axis (i.e., the z-axis) as the speed decreases. Similarly, when the motorcycle's speed is constant, the center of gravity of the light distribution intensity shifts upward along the vertical axis as the motorcycle's tilt increases.

[0039] The embodiments of the invention described above have a number of advantages. In particular, the optimized light distribution for the motorcycle is determined not only based on the motorcycle's tilt position but also taking into account the motorcycle's speed. It is considered that, at low speeds and in narrow curves, the center of gravity of the light distribution intensity should shift significantly into the curve in order to efficiently illuminate it.

[0040] List of reference numerals

[0041] 100 motorcycle

[0042] 101 motorcycle front wheel

[0043] The rear wheel of the 102 motorcycle

[0044] Frame of 103 motorcycle

[0045] 1 headlight

[0046] 2. First sensor device (speed sensor)

[0047] 3. Second sensor device (tilt sensor)

[0048] 4 Control equipment

[0049] x-axis

[0050] y-axis

[0051] z-axis

[0052] v speed

[0053] tilt

[0054] alpha perspective

[0055] Turning radius

[0056] BR observation direction

[0057] BW sight distance

[0058] FP Focus

[0059] LV light distribution

[0060] The centroid of intensity of LS light distribution

[0061] SG section

Claims

1. Motor vehicles (100), of which, The motor vehicle is a single-track motor vehicle or a multi-track motor vehicle with tilting technology. The motor vehicle (100) has a longitudinal axis (x) and a transverse axis (y). When the motor vehicle (100) is traveling in a straight line, the longitudinal axis (x) corresponds to the direction of travel of the motor vehicle (100), and the transverse axis (y) corresponds to the direction of extension of the motor vehicle (100) along the driving lane perpendicular to the longitudinal axis (x). The motor vehicle (100) includes a headlight (1) for generating a predetermined light distribution (LV) in front of the motor vehicle (100), a first sensor device (2) for detecting the speed (v) of the motor vehicle (100), and a device for detecting the tilt of the motor vehicle (100) about its longitudinal axis (x). The second sensor device (3), Its features are, A control device (4) is provided to manipulate the headlights (1) during operation, such that the position of the center of gravity (LS) of the intensity of the pre-given light distribution (LV) depends on the detected speed (v) and detected tilt (v) of the vehicle (100). The tilt of the motor vehicle (100) relative to the motor vehicle (100) is changed. When the speed (v) of the vehicle (100) is constant, the center of gravity (LS) moves along the horizontal axis (y) in the direction in which the vehicle (100) is tilted as the speed (v) of the vehicle (100) decreases. And when the speed of the vehicle (100) is constant, the center of gravity (LS) moves along the horizontal axis (y) in the direction in which the vehicle (100) is tilted as the tilt of the vehicle (100) increases.

2. The motor vehicle according to claim 1, characterized in that, The center of gravity (LS) is further determined by the tilt of the vehicle (100). Under constant conditions, as the speed (v) of the motor vehicle (100) decreases, the center of gravity (LS) moves upward along the vertical axis (z) of the motor vehicle, which extends perpendicularly to the longitudinal axis (x) and the transverse axis (y). Furthermore, under constant speed (v) of the motor vehicle (100), the center of gravity (LS) shifts upward with the tilt of the motor vehicle (100). As the value increases, it moves upward along the vertical axis (z).

3. The motor vehicle according to claim 1 or 2, characterized in that, The control device (4) is designed such that the control device is controlled by the speed (v) and tilt (v) detected by the motor vehicle (100). The turning radius (r) of the curve traveled by the motor vehicle (100) is calculated, and the angle of view (α) of the driver of the motor vehicle (100) is obtained based on the turning radius (r), the angle of view (α) being the displacement angle of the center of gravity (LS) of the light distribution (LV) relative to the longitudinal axis (x).

4. The motor vehicle according to claim 3, characterized in that, For the pre-given light distribution (LV), a viewing distance (BW) is pre-given, which describes the time required for the motor vehicle (100) to travel along the direction of the viewing angle (α) to the focal point (FP) while traveling at a detected speed (v), the focal point (FP) corresponding to a point on the curve traveled by the motor vehicle (100) along the direction of the viewing angle (α), and the control device (4) is designed such that the control device determines the viewing angle (α) of the driver of the motor vehicle (100) from the viewing distance (BW) and the turning radius (r).

5. The motor vehicle according to any one of the preceding claims, characterized in that, The pre-defined light distribution (LV) is either high beam, low beam, or city light.

6. The motor vehicle according to any one of the preceding claims, characterized in that, In the motor vehicle (100), the pre-defined light distribution (LV) can be switched between multiple light distributions.

7. The motor vehicle according to claim 6, characterized in that, The width of the light distribution (LV) about the horizontal axis (y) is different among the plurality of light distributions.

8. The motor vehicle according to any one of the preceding claims, characterized in that, The headlight (1) is a matrix headlight composed of multiple light sources, and the position of the centroid (LS) of the intensity of the pre-given light distribution (LV) is changed by changing the brightness of the light sources.

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