Patent Description:
Various lighting systems for vehicles that lean, bank or otherwise undergo significant changes in driving position are known. Such vehicles may include motorcycles, scooters, mopeds, etc. One of the problems commonly associated with driving e.g. a motorcycle is limited use when the light is needed to illuminate the road. For example, as a rider turns and thereby tilts the motorcycle, the light no longer lights the ideal path for the rider, which has negative impact on the safety of driving the motorcycle. Accordingly, although great strides have been made in the area of motorcycle lighting systems, many shortcomings remain. Problems with existing solutions for adapting the light as the motorcycle's position varies in relation to the road include complex and expensive solutions, which are also cumbersome to fit or retrofit to headlight assemblies of modern motorcycles which often are compact and have a great design variability. TWM 492260U discloses a LED lamp body connected to a drive motor. The motor has a headlight mount with extensions forming a bracket typical for a frame mount of a vehicle. <CIT> discloses a headlamp having a reflector unit in a lamp body. The reflector unit includes a light source bulb and a driving mechanism. The driving mechanism supports the light source bulb in such that it is rotatable about an optical axis. The reflector is not rotatable. When the vehicle body rolls the bulb driving mechanism rotates the light source bulb in the direction opposite to the rolling direction. In <CIT> both the light source and the reflector are rotatable around the motor's rotation axis, but the this axis is perpendicular to the optical axis of the light source.

It is an object of the invention to at least partly overcome one or more limitations of the prior art. In particular, it is an object to provide an improved lighting system for leaning vehicles, such as motorcycles, in particular allowing for a facilitated fit or retrofit to a wider range of headlight assemblies, while being less complex and costly to manufacture. According to the invention, this is achieved by the lighting system described in claim <NUM>, by the method of lighting control described in claim <NUM> and by the method of providing lighting for a leaning vehicle described in claim <NUM>.

Further examples of the invention are defined in the dependent claims.

Having a pivot frame configured to be fixed to a light emitting and to a light reflective device, a mount configured to be fixed to a light fitting of a leaning vehicle, a motor attached to the pivot frame and the mount to rotate the pivot frame relative to the mount in response to sensor data of a leaning angle (v) of the leaning vehicle provides a compact and less complex light system that facilitates fit or retrofit to a wide range of headlight assemblies for vehicles such as motorcycles, scooters, mopeds, etc. ATV's, watercrafts, and three-wheelers.

Embodiments of the invention will now be described, by way of example, with reference to the accompanying schematic drawings.

Embodiments of the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all, embodiments of the invention are shown. The invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

<FIG> is a schematic illustration of a lighting system <NUM> for a leaning vehicle <NUM>, such as a motorcycle, exemplified in <FIG>. The lighting system <NUM> comprises a pivot frame <NUM> configured to be fixed to a light emitting and to a light reflective device <NUM>, <NUM>', <NUM>", as described further in relation to <FIG>, <FIG>, <FIG>, <FIG> and <FIG> In the example of <FIG>, the pivot frame <NUM> is fixed to the light reflective device <NUM>". The light emitting device <NUM> is also attached to the pivot frame <NUM> in <FIG>, while <FIG> shows an example that does not fall under the scope of the invention where the pivot frame <NUM> is attached to the light reflective device <NUM>", and not the light emitting device <NUM>. In all examples as schematically illustrated in <FIG>, <FIG>, <FIG>, <FIG>, <FIG>, <FIG>, it is conceivable that the light reflective device <NUM>" and/or the light emitting device <NUM>, <NUM>', is removably attachable to the pivot frame <NUM>. Such removable attachment may be provided by threads, screws, bolts, clamps, connectors, pins, or other engagement mechanisms. Thus, the light reflective device <NUM>" and the light emitting device <NUM>, <NUM>', are fixed to the pivot frame <NUM> by attachment thereto. The light reflecting device <NUM>" may comprise different types and combinations of reflecting surfaces for directing the light from the light emitting device <NUM>, <NUM>, according to a desired pattern. The light reflecting device <NUM>" may also comprise lens or projection elements (not shown) for projecting the light from the light emitting device <NUM>, <NUM>', according to a desired illumination pattern on the road surface (R). The light reflecting device <NUM>" is only schematically illustrated in <FIG>, <FIG>, <FIG>, <FIG>, <FIG> and it should be understood that the light reflecting device <NUM>" may have various shapes and configurations while being fixed to the pivot frame <NUM>. The lighting system <NUM> provides for the advantageous benefits as described in the present disclosure for any such variations of the light reflecting device <NUM>". The light emitting device <NUM>, <NUM>', may comprise a luminescent light source such as a LED or laser light source, or a gas-discharge lamp, such as xenon lamp, or an electrical gas-discharge lamp, such as a high-intensity discharge lamp (HID lamp), or any combination thereof. The lighting system <NUM> provides for the advantageous benefits as described in the present invention for any such variations of the light emitting device <NUM>.

The lighting system <NUM> comprises a mount <NUM> configured to be fixed to a light fitting <NUM> of a leaning vehicle, such as a motorcycle <NUM>. The example of <FIG> shows only a schematic light fitting or connector <NUM>. The mount <NUM> may be configured to engage with such fitting <NUM> e.g. by a connecting element comprising threads, screws, bolts, clamps, connectors, pins, or other engagement mechanisms, to provide a fixed position of the mount <NUM> relative the leaning vehicle <NUM>. The mount <NUM> may be configured for removably attaching the lighting system <NUM> to the light fitting <NUM> of a headlight assembly <NUM> of the leaning vehicle <NUM>, e.g. by any of the mentioned engagement mechanisms. The mount <NUM> may comprise a threaded rod in some examples for a facilitated mounting, by screwing the threaded rod into a corresponding female threaded opening of the fitting <NUM>. It is conceivable that the lighting system <NUM> can be mounted in a wide range of headlight assemblies <NUM> and also be utilized as any other light source on the vehicle <NUM> for improving driver safety, such as an auxiliary light source mounted to the vehicle <NUM>. Any plurality of the lighting system <NUM> as described in the present invention may be combined in a plurality of light sources, such as a plurality of headlight assemblies and/or a plurality of auxiliary lights.

The lighting system <NUM> comprises a motor <NUM> attached to the pivot frame <NUM> and the mount <NUM>. The motor <NUM> is configured to provide rotational movement of the pivot frame <NUM> relative to the mount <NUM>, as schematically indicated with opposing arrows at the motor <NUM> in <FIG>. The light emitting device <NUM> and the light reflective device <NUM>" are thus able to rotate relative to the mount <NUM>. The lighting system <NUM> comprises a controller <NUM> in electrical communication with the motor <NUM>. The controller <NUM> is configured to receive sensor data of a leaning angle (v) of the leaning vehicle <NUM>, such as indicated for the leaning motorcycle in <FIG>. The sensor data may be provided by motion sensor components already connected to the electrical system <NUM> of the motorcycle, and/or the sensor data may be provided by a motion sensor <NUM> connected to the lighting system <NUM> as described further below with reference to e.g. <FIG>. It is conceivable that the sensor data is communicated to the controller <NUM> through a wired connection or via wireless data transmission over various electromagnetic communication frequencies. The controller <NUM> may be integrated with the motor <NUM> or connected to the mount <NUM>, or the pivot frame <NUM>. Alternatively, the controller <NUM> may be attached to any component of the leaning vehicle <NUM> and configured to communicate with the motor <NUM> through a wired or wireless connection. In the latter case, the motor <NUM> may comprise a receiver (not shown) to receive control instructions from the controller <NUM>. The controller <NUM> is thus configured to control the motor <NUM> to rotate the pivot frame <NUM> to a desired angle relative to the mount <NUM> based on the leaning angle (v). The controller <NUM> may be configured to rotate the pivot frame <NUM> angle relative to the mount <NUM> so that a defined level position of the pivot frame <NUM> relative the road surface (R) is maintained. Hence, if the level position is defined at v = <NUM> degrees, relative a normal (N) of the surface (R) in the example of <FIG>, the controller <NUM> may be configured to rotate the pivot frame <NUM> relative the mount <NUM> with an angle (v') that cancels out any deviation from such level position, e.g. by rotating the pivot frame <NUM> with an angle v' = -v if the motorcycle <NUM> leans with an angle v from the level position. The mount <NUM> is assumed to have a fixed relationship to the motorcycle <NUM>. It is conceivable however that the controlled <NUM> may be configured to apply any off-set value (W) to the angle (v') by which the pivot frame <NUM> is rotated relative the mount <NUM> for any given angle (v) by which the motorcycle <NUM> leans; e.g. v' = -v ± W. For example, it may be desired to overcompensate or undercompensate the leaning motion of the motorcycle <NUM> in some applications or situations. It is further conceivable that such compensation may be a linear or non-linear function (f) of the leaning angle (v), i.e. v' = f(v), where the function (f) may in addition take into account any motion characteristics (m) of the leaning vehicle <NUM>, such as speed and acceleration in three dimensions; v' = f(v,m). The controller <NUM> may thus be configured to determine the desired angle (v') as a function of the leaning angle (v) and motion characteristics of the leaning vehicle <NUM>. It is also conceivable that the controller <NUM> is configured to determine the angle v' based on other sensor data such as environmental or ambient data, e.g. ambient light conditions when driving the vehicle <NUM>, to provide for further optimization of the illumination of the road to the driving conditions.

Hence, since the light emitting device <NUM> and the light reflective device <NUM>" are attached to the pivot frame <NUM> when the lighting system <NUM> is mounted to the motorcycle <NUM>, and rotate along with the rotation angle (v') of the pivot frame <NUM>, the light pattern and characteristics may be optimized for the driver regardless of the leaning angle (v) of the vehicle <NUM>. Having a pivot frame <NUM> configured to be fixed to the light emitting and to the light reflective devices <NUM>, <NUM>" a mount <NUM> configured to be fixed to a light fitting <NUM> of a leaning vehicle <NUM>, and a motor <NUM> attached to the pivot frame <NUM> and the mount <NUM> to rotate the pivot frame <NUM> relative to the mount <NUM> in response to sensor data of a leaning angle (v) of the leaning vehicle <NUM> provides for a particularly compact light system <NUM> with few components, which facilitates fit or retrofit to a wide range of headlight assemblies. As described, the lighting system <NUM> provides for a highly adaptable light which allows for taking into account a wide range of driving- and vehicle characteristics.

The pivot frame <NUM> is configured to be fixed to a light emitting device <NUM> configured to emit light along an optical axis <NUM>. The pivot frame <NUM> is rotatable around a pivot axis <NUM> relative to the mount <NUM>. The embodiment of <FIG> illustrates an optical axis <NUM> of the light emitting device <NUM> and a pivot axis <NUM> of the pivot frame <NUM>. The pivot axis <NUM> is parallel with the optical axis <NUM>. This provides for an effective manipulation of the light pattern over a wide range of driving conditions, while fit or retrofit to a wide range of headlight assemblies may be facilitated.

The optical axis <NUM> is concentric with the pivot axis <NUM>, as exemplified in <FIG>. This provides for a compact lighting system <NUM> with a minimized footprint in the vertical direction, perpendicular to the pivot axis <NUM>. This may be particularly advantageous in small headlight assemblies where mounting space is limited.

In another example that does not fall under the scope of the invention, the optical axis <NUM>, <NUM>', is off-set from the pivot axis <NUM> with an off-set distance (d<NUM>, d<NUM>) in a direction perpendicular to the pivot axis <NUM>, as seen in <FIG>. Providing for an off-set optical axis <NUM> as exemplified in <FIG> allows for utilizing the adaptable lighting of the lighting system <NUM> as explained above for a wider range of optical configurations and headlight assemblies. This also facilitates utilizing a plurality of light emitting devices <NUM>, <NUM>', for such adaptive lighting. This is exemplified in <FIG> where two light emitting devices <NUM>, <NUM>', and associated optical axes <NUM>, <NUM>', are arranged with respective off-set distances (d<NUM>, d<NUM>) from the pivot axis <NUM>. It is conceivable that any plurality of light emitting devices <NUM>, <NUM>', may be utilized in this manner.

Although the aforementioned examples show the optical axis <NUM>, <NUM>', arranged in parallel with the pivot axis <NUM>, it is conceivable that in some applications it may be advantageous to arrange the optical <NUM>, <NUM>', with an angle from the pivot axis <NUM>.

The lighting system <NUM> comprises a sensor <NUM> configured to detect the aforementioned leaning angle (v) of the leaning vehicle <NUM> and sends the sensor data to the controller <NUM>. The sensor <NUM> may be integrated with the lighting system <NUM> which provides for a facilitated retrofitting to existing headlight assemblies as well as a more compact and robust lighting system <NUM>. The sensor <NUM> may be integrated with the lighting system <NUM> by being attached to the pivot frame <NUM> or the mount <NUM> as shown in <FIG>, or to the motor <NUM> itself. The sensor <NUM> being integrated with the lighting system <NUM> may also be construed as the controller <NUM> being in communication with a dedicated sensor <NUM> providing the aforementioned sensor data to the controller <NUM>, hence facilitating replacement of standard non-adaptive lights with the lighting system <NUM>.

The sensor <NUM> may be attached to the pivot frame <NUM>, as schematically shown in the example of <FIG>. This provides for a compact lighting system <NUM> and facilitated retrofit as elucidated above. Having the sensor <NUM> attached to the pivot frame <NUM> may be particularly advantageous in installations where the available space around the mount <NUM> is limited. The sensor <NUM> may thus rotate along with the pivot frame <NUM>. This may provide for improved sensor performance <NUM> in some situations, since the sensor <NUM> may be kept at the defined level. It is further conceivable that the sensor <NUM> may comprise multiple sensors such as an ambient sensor, or a sensor for speed and acceleration detection, in addition to detection of leaning angle (v). The performance of such sensor may in some applications be improved if the sensor is kept level during driving the vehicle <NUM>. The sensor <NUM> in communication with the controller <NUM> may thus be configured to compare its current leaning angle with a desired angle, e.g. a horizontal level position, and send instructions to the motor <NUM> to rotate the pivot frame <NUM> and the sensor <NUM> attached thereto, so that the sensor <NUM> assumes a position corresponding to the desired angle.

Alternatively, the sensor <NUM> may be attached to the mount <NUM>, as schematically shown in <FIG>. The sensor <NUM> may also be integrated with the motor <NUM>, either to the portion of the motor rotating with the pivot frame <NUM>, or to the portion of the motor rotating with the mount <NUM>.

The mount <NUM> may comprise a connector <NUM> configured for attachment to the light emitting device <NUM>. An example which does not fall under the scope of the invention is illustrated in <FIG>. It shows that the connector <NUM> extends from the light emitting device <NUM> to the portion of the mount <NUM> engaging with the fitting <NUM> of the vehicle <NUM>. Thus, in this example, the light emitting device <NUM> has a fixed position in relation to the vehicle <NUM>. The pivot frame <NUM> is configured to be fixed to the light reflective device <NUM>". The light reflective device <NUM>" is thus rotatable relative the light emitting device <NUM> by the motor <NUM>. This may provide for a facilitated integration with some headlight assemblies when fitting or retrofitting the lighting system <NUM> thereto. A stationary light emitting device <NUM> may for example facilitate the electrical connection to the electrical system of the vehicle <NUM>.

The connector <NUM> may be concentrically aligned with the pivot axis <NUM> of the pivot frame <NUM>, as exemplified in <FIG>. This provides for a compact lighting system <NUM> as described above.

The lighting system <NUM> may comprise a secondary light emitting device <NUM>' fixed to the pivot frame <NUM>, as shown in the example of <FIG> which does not fall under the scope of the invention. It is to be understood that any plurality of light emitting devices <NUM>, <NUM>', may be fixed to the pivot frame <NUM> as described above.

The lighting system <NUM> comprises the aforementioned light reflective device <NUM>". The light reflective device <NUM>" is attached to the pivot frame <NUM>. The light reflective device <NUM>" may be integrated with the pivot frame <NUM>, which may provide for a particularly robust and compact lighting system <NUM>. The pivot frame <NUM> is configured to be fixed to the light emitting device <NUM>. The light emitting device <NUM> and the light reflective device <NUM>" are thus rotatable relative the mount <NUM> by the motor <NUM>.

The lighting system <NUM> comprises an electrical connection interface <NUM> configured to connect to an electrical system <NUM> of the leaning vehicle <NUM> for communication between the electrical system <NUM> and the controller <NUM> to receive the aforementioned sensor data, as described above and schematically illustrated in <FIG>. The sensor data may thus be received via sensors already connected to the electrical system <NUM> of the vehicle <NUM>.

The electrical connection interface <NUM> may also be configured to allow for communication between the electrical system <NUM> and the light emitting device <NUM>, <NUM>', i.e. to control the power to the light emitting device <NUM>, <NUM>'. In one example, the controller <NUM> may be configured to control the power output to the light emitting device <NUM>, <NUM>', e.g. to vary the amount of light in dependence on the sensor data. It may be desirable for example to increase the light output momentarily as the motorcycle leans into a curve in the road. The controller may thus be configured to control a power output to the light emitting device <NUM>, <NUM>', based on the leaning angle (v).

<FIG> is a schematic diagram of a lighting system <NUM> according to an example. The sensor <NUM> and the motor <NUM> are in communication with the controller <NUM>. An electrical connection interface <NUM> may connect to an electrical system <NUM> of the leaning vehicle <NUM>, to allow for electrical communication with the controller <NUM> and/or the light emitting device <NUM>, <NUM>'. The controller <NUM> may also communicate with the light emitting device <NUM>, <NUM>', as mentioned above.

The motor <NUM> is be concentrically arranged with respect to the pivot frame <NUM>. A width (w<NUM>) of the motor <NUM>, in a direction perpendicular to the pivot axis <NUM> of the pivot frame <NUM> may be at the most <NUM>% wider than a width (w<NUM>) of the pivot frame <NUM> and/or a light emitting device <NUM> connected to the pivot frame <NUM>. This provides for a compact lighting system <NUM> for facilitated integration in a wide range of different headlight assemblies <NUM>.

The width (w<NUM>) of the motor <NUM>, in a direction perpendicular to a pivot axis <NUM> of the pivot frame <NUM>, may correspond essentially to, or be less than, the width (w<NUM>) of the pivot frame <NUM> and/or a light emitting device <NUM> connected to the pivot frame <NUM>. The example in <FIG> shows the width (w<NUM>) of the motor <NUM> corresponding essentially to the width (w<NUM>) of the pivot frame <NUM> and/or a light emitting device <NUM>. This provides for a particularly facilitated integration in various headlight assemblies <NUM>. The lighting system <NUM> may thus readily replace standard, non-adaptive lighting by removal of the standard light source in the headlight assembly <NUM> and connecting the mount <NUM> of the lighting system <NUM> in the standard light source fitting <NUM>. The width of the motor <NUM> may in one example be at the most <NUM> for such facilitated retrofit, or facilitated integration in the manufacturing of a wide range of compact headlight assemblies <NUM>.

The motor <NUM> may be a gimbal motor. It is conceivable that various types of motors <NUM> may be arranged to connect the mount <NUM> and the pivot frame <NUM>, such as stepper or servo motors. The motor <NUM> may be a brushless motor optimized for quick response and instant changes in rotational direction. The compact arrangement realized by the lighting system <NUM>, particularly in the examples where the optical axis <NUM> is aligned with the pivot axis <NUM>, allows for minimizing the required torque, i.e. the weight that needs to be pulled by the motor <NUM> for the pivoting motion. This allows the use of a compact gimbal motor <NUM>, which further adds to the compactness of the lighting system <NUM>. The gimbal motor <NUM> may be optimized for rapid and accurate response within a defined angular interval relevant to the level adjustment of the vehicle <NUM>.

The lighting system <NUM> may comprise the light emitting device <NUM>, <NUM>'. The light emitting device <NUM>, <NUM>', may be attached to the pivot frame <NUM> and in electrical communication with the electrical connection interface <NUM> via an electrical connector attached to the pivot frame <NUM>. The light emitting device <NUM>, <NUM>', may be a long-life light source such as a LED, attached to the pivot frame <NUM>, and which may have a permanently connection to the connection interface <NUM>, to be connected to the electrical system <NUM> of the vehicle <NUM>. This provides for a particular compact and light-weight lighting system <NUM>. It is however conceivable that such light emitting device <NUM>, <NUM>', and its connection interface <NUM> may be removable attached to the pivot frame <NUM> to allow for a facilitated exchange to e.g. LED's with different illumination level output. In one example, the light emitting device <NUM>, <NUM>', comprises a light source configured to be connected to a socket of an electrical connector attached to the pivot frame <NUM>, in which case the light emitting device <NUM>, <NUM>', is removably attached to such electrical socket.

<FIG> are illustrations of further examples of the lighting system <NUM>. <FIG> shows a mount <NUM> comprising a threaded rod to be fixed to a corresponding fitting <NUM> of a vehicle <NUM>. The mount <NUM> is connected to the motor <NUM> which is connected at its other side to the pivot frame <NUM>. A rotatable interior <NUM>' of the motor <NUM> is indicated. The reflector <NUM>" is attached to the pivot frame <NUM> to allow for rotation of the reflector <NUM>" relative the mount <NUM>. Wires of the electrical connection interface <NUM> are arranged through the mount <NUM>, i.e. in the interior of the rod. The compact arrangement of the mount <NUM>, motor <NUM> and pivot frame <NUM> provides for a facilitated mounting of the lighting system <NUM> to a wide range of existing headlight assemblies. The mount <NUM> may be varied to fit a plurality of different motorcycles <NUM>. <FIG> shows another view of the lighting system <NUM>, where the reflector <NUM>" has been rotated slightly relative the mount <NUM>, compared to the illustration in <FIG>. Although element <NUM>" is referred to as a reflector or light reflective device <NUM>" it is to be understood that various outside housing components may be arranged to enclose the actual light directing elements of the light reflective device <NUM>". <FIG>, and <FIG> show examples of such housing components. The illustration in <FIG> shows an example of a housing of a headlight assembly <NUM> in which the lighting system <NUM> may be mounted. The mount <NUM> may comprise a plate <NUM>' arranged to facilitate a secure fit of the lighting system <NUM>. As mentioned above, the light reflective device <NUM>" may comprise any reflective or optical components to direct the light from the light emitting element <NUM>, <NUM>', to the road surface with a desired illumination pattern. The light reflective device <NUM>" may e.g. comprise a lens or light projecting element 201a, as illustrated in the view in <FIG>, which accordingly is rotated relative the mount <NUM> as described above.

<FIG> is a flowchart of a method <NUM> of lighting control in a lighting system <NUM> for a leaning vehicle <NUM>. The lighting system <NUM> comprises a pivot frame <NUM> configured to be fixed to a light emitting and to a light reflective devices <NUM>, <NUM>", a mount <NUM> configured to be fixed to a light fitting <NUM> of a leaning vehicle <NUM>, and a motor <NUM> attached to the pivot frame <NUM> and the mount <NUM>. The motor <NUM> is configured to provide rotational movement of the pivot frame <NUM> relative to the mount <NUM>, as explained above. The method <NUM> comprises receiving <NUM> sensor data of a leaning angle (v) of the leaning vehicle <NUM>, and rotating <NUM> the pivot frame <NUM> to a desired angle (v') relative to the mount <NUM> based on the leaning angle (v). The method <NUM> thus provides for the advantageous benefits as described above for the lighting system <NUM> and <FIG>, <FIG>, <FIG>, <FIG>, <FIG>, <FIG>.

Claim 1:
A lighting system (<NUM>) for a leaning vehicle (<NUM>), comprising:
a pivot frame (<NUM>) configured to be fixed to a light emitting device (<NUM>) and to a light reflective device (<NUM>"),
a mount (<NUM>) configured to be fixed to a light fitting (<NUM>) of a leaning vehicle,
a motor (<NUM>) attached to the pivot frame (<NUM>) and the mount (<NUM>), wherein the motor is configured to provide rotational movement of the pivot frame (<NUM>) relative to the mount (<NUM>) around a rotational axis of the motor, whereby the rotational axis is a pivot axis (<NUM>) being concentric with an optical axis (<NUM>) of the light emitting device (<NUM>), and
a controller (<NUM>) in electrical communication with the motor (<NUM>) and being configured to receive sensor data of a leaning angle (v) of the leaning vehicle (<NUM>), and
wherein the controller (<NUM>) is configured to control the motor (<NUM>) to rotate the pivot frame (<NUM>) to a desired angle (v') relative to the mount (<NUM>) based on the leaning angle,
whereby the light emitting device (<NUM>) and the light reflective device (<NUM>") are rotatable by the motor (<NUM>) relative the mount (<NUM>), characterized in that the motor (<NUM>) is concentrically arranged with respect to the pivot frame (<NUM>), and
wherein the pivot frame and the mount are connected at opposite sides of the motor and the mount comprising a connecting element configured for removably attaching the lighting system to a corresponding light fitting of an existing headlight assembly (<NUM>) of the leaning vehicle.