Motor vehicle with a rear air deflector and a brake light

Abstract

Motor vehicle (10) with a rear air guide (12) that is movable between a retracted rest position and an extended operating position, and with a brake light (14) that is arranged in the longitudinal direction (X) or in the forward direction of travel of the motor vehicle (10) in front of it and in the vertical direction (Z) of the motor vehicle (10) above the air guide (12) in the retracted rest position. The air guide (12) is divided into multiple sections parallel to the longitudinal direction (X) of the motor vehicle (10) such that it has at least one central section (12a) that overlaps the brake light (14) in the transverse direction (Y) of the motor vehicle (10), and lateral sections (12b, 12c) that do not overlap the brake light (14) in the transverse direction (Y) of the motor vehicle (10).In the extended operating position, the lateral sections (12b, 12c) of the air guide device (12) are extended further than the central section (12a) of the air guide device (12), so that in the extended operating position a rearward perceptible beam angle of the brake light (14) or a rearward perceptible illumination area (B) of the brake light (14) is greater than or corresponds to a predetermined limit value.

Description

[0001] The invention relates to a motor vehicle with a rear air guiding device and a brake light according to the preamble of claim 1.

[0002] EP 0 849 146 B1 discloses a motor vehicle with a rear air deflector and a brake light. The rear air deflector is movable between a retracted rest position and an extended operating position. The brake light is arranged in front of the air deflector in the longitudinal direction of the motor vehicle and, in the vertical direction of the motor vehicle, above the air deflector in the retracted rest position. Such a brake light is also referred to as a high-mounted brake light. In an extended operating position, the air deflector conceals the brake light when viewed from behind, so that the beam angle of the brake light or the illumination range of the brake light visible from behind is severely restricted. Therefore, an additional brake light is integrated into the air deflector, which is switched on depending on the position of the rear air deflector.

[0003] US 5 871 254 A discloses another motor vehicle with a rear air guiding device and a brake light integrated into the rear air guiding device.

[0004] There is a need for a motor vehicle in which, even without a brake light integrated into the air-guiding device, a beam angle or illumination area of ​​the brake light, which is arranged longitudinally in front of the air-guiding device, perceived from the rear is greater than or equal to a predetermined limit value when the air-guiding device assumes the operating position. The object of the invention is to create a novel motor vehicle with a rear-mounted air-guiding device and a brake light. This object is achieved by a motor vehicle according to claim 1.

[0005] According to the invention, the air guiding device is divided several times in or parallel to the longitudinal direction of the motor vehicle, such that it has at least one central section which extends in the transverse direction of the motor vehicle, overlapping the brake light, and lateral sections which extend in the transverse direction of the motor vehicle, non-overlapping the brake light. In the extended operating position, the lateral sections of the air guiding device are extended further than the central section thereof, so that in the extended operating position, a beam angle of the brake light perceptible from behind or an illumination area of ​​the brake light perceptible from behind is greater than or corresponds to a predetermined limit value.

[0006] The invention makes it possible to provide a sufficiently large perceptible beam angle or an exceptionally large perceptible illumination area for the brake light positioned longitudinally in front of the air guide device, without the need for a brake light integrated into the air guide device, even when the air guide device is shifted into the operating position to provide a desired rear axle downforce. According to the invention, the air guide device is divided into at least three sections parallel to the longitudinal direction of the motor vehicle, namely at least a central section and lateral sections.The invention is based on the finding that, in order to provide a sufficiently large beam angle perceptible from the rear or a sufficiently large illumination range of the brake light perceptible from the rear while simultaneously providing a sufficiently large rear axle downforce, the central section and the lateral sections of the air guiding device should assume an operating position that is extended upwards to different extents in the vertical direction of the motor vehicle. Thus, the beam angle perceptible from the rear or the illumination range of the brake light perceptible from the rear is primarily defined by the central section of the air guiding device, while a sufficiently large rear axle downforce is primarily provided by the lateral sections of the air guiding device.

[0007] According to a first development of the invention, the motor vehicle has a first drive for displacing at least the central section of the air guiding device and a second drive for displacing exclusively the lateral sections of the air guiding device. This development of the invention is structurally preferred in order to provide the differently extended operating position for the central section and the lateral sections of the air guiding device.

[0008] Preferably, according to the first development of the invention, the first drive displaces the central section and the lateral sections of the air guiding device together to a first extended position, wherein the second drive displaces exclusively the lateral sections of the air guiding device from this first extended position into a second, even further extended position.In particular, for this purpose the air guiding device has a continuous lower shell and an upper shell divided into central and lateral sections, wherein a first kinematics engages the lower shell, via which the first drive displaces the lower shell as well as the central section and the lateral sections of the upper shell and thus of the air guiding device together up to the first extended position, wherein the second drive is mounted on the lower shell and can be displaced together with the lower shell, and wherein a second kinematics is mounted on the lower shell, which engages the lateral sections of the upper shell and via which the second drive displaces the lateral sections of the upper shell and thus of the air guiding device together up to the second extended position. This structural embodiment of the first development of the invention is simple and therefore particularly preferred.

[0009] Alternatively, according to the first refinement, the first drive moves only the center section, and the second drive moves only the side sections of the air guide device, independently of the center section. This also allows a sufficiently large beam angle or illumination area of ​​the brake light to be provided, visible from the rear, with sufficiently large rear axle downforce.

[0010] According to a second development, the motor vehicle has a common drive for displacing the central section and the lateral sections of the air guiding device, furthermore a first transmission connected between the drive and the central section, and a second transmission connected between the drive and the lateral sections, wherein the first transmission and the second transmission have different transmission ratios or reduction ratios in order to displace the central section and the lateral sections by different distances from the rest position into the respective extended operating position via the common drive. The second development requires a single drive for displacing the sections of the air guiding device.

[0011] Preferred developments of the invention will become apparent from the dependent claims and the following description. Exemplary embodiments of the invention are explained in more detail, without being limited thereto, with reference to the drawings. Herein: Fig. 1 a perspective view obliquely from above and rear of a rear area of ​​a motor vehicle according to the invention; Fig. 2 a perspective view from diagonally above the front of the rear area of ​​the Fig. 1; Fig. 3 a view from behind of the rear area of ​​the Fig. 1; Fig. 4 a top view of the rear area of ​​the Fig. 1.

[0012] The invention relates to a motor vehicle 10, in particular a passenger car designed as a sports car. Fig. 1 to 4 show different views of a rear area 11 of a motor vehicle 10, wherein the motor vehicle 10, namely the rear area 11 thereof, has a rear-side air guiding device 12 which is displaceable between a retracted rest position and an extended operating position. Fig. 1 to 4 show the rear air guiding device 12 in the extended operating position.

[0013] The rear-end air guiding device 10 is arranged in the longitudinal direction X and thus in the forward direction of travel of the motor vehicle 10 behind a rear body structure, designed in particular as a trunk lid 13, wherein the trunk lid 13 accommodates a brake light 14 of the motor vehicle 10. The brake light 14 is arranged in the longitudinal direction X and thus in the forward direction of travel of the motor vehicle 10 in front of the rear-end air guiding device 12, wherein the brake light 14 is arranged above the air guiding device 12 in the vertical direction Z of the motor vehicle 10 in the retracted rest position of the air guiding device 12. Such a brake light 14 is also referred to as a high-mounted brake light.

[0014] In the retracted rest position of the air guiding device 12, further rear lights 15 can be arranged below the air guiding device 12 in the vertical direction Z of the motor vehicle 10.

[0015] The air guiding device 12 is divided into several sections in or parallel to the longitudinal direction X of the motor vehicle 10, namely at least into a central section 12a and lateral sections 12b, 12c. These sections 12a, 12b, 12c are arranged next to one another in the transverse direction Y. In the transverse direction Y, the central section 12a of the air guiding device 12 extends so as to overlap the brake light 14, which is arranged in front of the rear air guiding device 12 in the longitudinal direction X and thus in the forward direction of travel of the motor vehicle 10. The lateral sections 12b, 12c of the air guiding device 12 extend in the transverse direction Y of the motor vehicle 10 so as to not overlap the brake light 14, which is arranged in front of the rear air guiding device 12 in the longitudinal direction X and thus in the forward direction of travel of the motor vehicle 10.

[0016] In the extended operating position, the lateral sections 12b, 12c of the air guiding device 12 are extended further upwards in the vertical direction Z of the motor vehicle 10 than the central section 12b of the air guiding device 12, so that in the extended operating position a beam angle of the brake light 14 perceptible from the rear or an illumination area B of the brake light 14 perceptible from the rear is greater than or corresponds to a predetermined limit value, specifically providing a rear axle output which is greater than or corresponds to a predetermined limit value.

[0017] The specified limit value for the beam angle of the brake light 14 or the illumination range B of the brake light 14 is in particular a legally specified limit value in order to comply with safety regulations.

[0018] In the Fig. 1 to 4, the motor vehicle 10 has a first drive 16 for displacing at least the central section 12a of the air guiding device 12 and a second drive 17 for displacing exclusively the lateral sections 12b, 12c of the air guiding device 12. In the exemplary embodiment shown, the first drive 16 displaces the central section 12a and the lateral sections 12b, 12c of the air guiding device 12 together up to a first extended position, wherein the second drive 17 displaces exclusively the lateral sections 12b, 12c of the air guiding device 12 from this first extended position into a second, even further extended position, so that the lateral sections 12b, 12c are then displaced further upwards in the vertical direction Z of the motor vehicle 10 than the central section 12a.In the preferred embodiment shown, the first drive 16 is fixed to the body, wherein the second drive 17 can be displaced into the first extended position together with the sections 12a, 12b and 12c of the air guiding device 12.

[0019] In the preferred embodiment shown, the air guiding device 12 has a continuous lower shell 18 and an upper shell 19 divided into sections 12a, 12b and 12c. A first kinematics 20 engages the lower shell 18, via which the first drive 16 displaces the lower shell 18 and, together with the lower shell 18, the upper shell 19, namely all sections 12a, 12b and 12c, into the first extended position, specifically together with the second drive 17. The second drive 17 is mounted on the lower shell 18, with a second kinematics 21 engaging the lower shell 18 and the lateral sections 12b, 12c of the upper shell 19, via which the second drive 17 displaces the lateral sections 12b, 12c of the air guiding device 12 together to the second extended position.

[0020] According to Fig. 3, the first drive 16 is coupled to the first kinematics 20 via a shaft 22, the second drive 17 is coupled to the second kinematics 21 via a shaft 23. Fig. 4 schematically shows pivot axes 24 about which the lateral sections 12b, 12c of the air guiding device 12 can be pivoted in order to displace them relative to the central section 12a, namely driven by the second drive 17.

[0021] In the example of Fig. 1 to 4, all sections 12a, 12b, 12c of the air guiding device 12 can be displaced jointly between the retracted rest position and the first extended operating position via the first drive 16. In order to further displace the lateral sections 12b, 12c upward in the vertical direction Z into the second extended position, these lateral sections 12b, 12c can be displaced from the first position via the separate second drive 17.

[0022] In contrast to the illustrated embodiment, it is also possible for a first drive to move exclusively the central section 12a and a second drive to move exclusively the lateral sections 12b, 12c. In this embodiment, the lateral sections 12b, 12c can then be moved between the retracted position and the extended position completely independently of the central section 12a.

[0023] In a further alternative, it is possible to provide a common drive for displacing the central section 12a and the lateral sections 12b, 12c, wherein this common drive is then operatively connected to the central section 12a via a first gear and to the lateral sections 12b, 12c via a second gear. The two gears then differ in their transmission ratios or reduction ratios in order to displace the lateral sections 12b, 12c and the central section 12a differently, namely into a respective operating position with different extensions.

[0024] The invention makes it possible to dispense with a brake light integrated into the air guiding device 12. Even when the air guiding device 12 is relocated to its operating position, a sufficiently large beam angle perceptible from the rear or a sufficiently large illumination area B of the brake light 14 perceptible from the rear is provided. Furthermore, a sufficiently large rear axle downforce can be provided when the air guiding device 12 is extended.

Claims

[1] Motor vehicle (10), with a rear air guiding device (12) which can be moved between a retracted rest position and an extended operating position, with a brake light (14) which is arranged in the longitudinal direction (X) or in the forward direction of travel of the motor vehicle (10) in front of and in the vertical direction (Z) of the motor vehicle (10) in the retracted rest position of the air guiding device (12) above the air guiding device (12), characterized by , that the air guiding device (12) is divided several times parallel to the longitudinal direction (X) of the motor vehicle (10), such that it has at least one central section (12a) which runs in the transverse direction (Y) of the motor vehicle (10) overlapping the brake light (14), and lateral sections (12b, 12c) which run in the transverse direction (Y) of the motor vehicle (10) non-overlapping the brake light (14), in the extended operating position, the lateral sections (12b, 12c) of the air guiding device (12) are extended further than the central section (12a) of the air guiding device (12), so that in the extended operating position a beam angle of the brake light (14) perceptible from behind or an illumination area (B) of the brake light (14) perceptible from behind is greater than or corresponds to a predetermined limit value. [2] Motor vehicle (10) according to claim 1, characterized by a first drive (16) for displacing at least the central section (12a) of the air guiding device (12), a second drive (17) for displacing only the lateral sections (12b, 12c) of the air guiding device (12). [3] Motor vehicle (10) according to claim 2, characterized by , that the first drive (16) moves the central section (12a) and the lateral sections (12b, 12c) of the air guiding device (12) together to a first extended position, the second drive (17) displaces exclusively the lateral sections (12b, 12c) of the air guiding device (12) from this first extended position into a second, even further extended position. [4] Motor vehicle (10) according to claim 3, characterized by , that the first drive (16) is fixed to the body, the second drive (17) can be displaced into the first extended position together with the sections (12a, 12b, 12c) of the air guiding device. [5] Motor vehicle (10) according to claim 3 or 4, characterized by , that the air guiding device (12) has a continuous lower shell (18) and an upper shell (19) divided into sections (12a, 12b, 12c), a first kinematics (20) acts on the lower shell (18), via which the first drive (16) displaces the lower shell (18) as well as the central section (12a) and the lateral sections (12b, 12c) of the upper shell (19) together to the first extended position, the second drive (17) is mounted on the lower shell (18) and is movable together with the lower shell (18), a second kinematics (21) is mounted on the lower shell (18), which engages the lateral sections (12b, 12c) of the upper shell (19) and via which the second drive (17) displaces the lateral sections (12b, 12c) of the air guiding device (12) together to the second extended position. [6] Motor vehicle (10) according to claim 2, characterized by , that the first drive only displaces the central section (12a) of the air guiding device (12), the second drive displaces exclusively the lateral sections (12b, 12c) of the air guiding device (12) independently of the central section (12a). [7] Motor vehicle (10) according to claim 1, characterized by a common drive for displacing the central section (12a) and the lateral sections (12b, 12c) of the air guiding device (12). a first gear connected between the drive and the middle section (12a), a second gear which is connected between the drive and the lateral sections (12b, 12c), wherein the first gear and the second gear have different transmission ratios or reduction ratios in order to displace the central section (12a) and the lateral sections (12b, 12c) from the rest position to different distances into the respective extended operating position via the common drive.

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