motor vehicle

Abstract

motor vehicle with a chassis, wherein the chassis comprises a chassis (12) as well as longitudinal control arms (25u) and transverse control arms (24u) for connecting wheels (10) to the chassis (12), with a body structure having an underbody and / or underbody paneling (13) which leaves the control arms (24u, 25u) of the wheel suspensions (11) free, with fairing parts (14) for the handlebars (24u, 25u) of the wheel suspensions (11), wherein the longitudinal control arms (25u) and the transverse control arms (24u) of the respective wheel suspension (11) are covered by a single, separate fairing part (14) in the area of ​​the respective wheel suspension, wherein the respective fairing part (14) has a recess (20) through which air can be supplied to a brake (17) assigned to the respective wheel (10) for cooling, characterized in that Viewed in the direction of airflow, upstream of the respective separate fairing part (14) a flow guidance element (22) connected to the underbody or underbody fairing (13) is arranged, which divides the airflow together with the fairing part (14), namely into a first airflow, which can be directed upstream of the recess (20) via a first flow channel (23) of the fairing part (14) to a first area of ​​the respective brake (17), wherein the first flow channel (23) of the respective fairing part (14) communicates with the flow guide element (22) arranged in the direction of airflow upstream of the respective separate fairing part (14) and an opening (29) formed between an upstream edge (28) of the respective fairing part (14) and the flow guide element (22) arranged in the direction of airflow upstream of the respective separate fairing part (14), and into a second airflow, which can be directed via the recess (20) of the respective fairing part (14) and via a second flow channel (21) of the fairing part (14) to a second area of ​​the respective brake (17), wherein the second flow channel (21) of the respective fairing part (14) communicates with the recess (20) of the respective fairing part (14), the respective first flow channel (23) and the respective second flow channel (21) together with the respective cladding part (14) are designed as a one-piece, monolithic assembly.

Description

[0001] The invention relates to a motor vehicle according to the preamble of claims 1 and 4.

[0002] The basic structure of motor vehicles is familiar from practical experience. Among other things, motor vehicles have a chassis and a body structure.

[0003] The chassis of a motor vehicle has a chassis and wheel suspensions that connect wheels to the chassis.

[0004] The body structure has an underbody and / or underbody paneling.

[0005] From DE 10 2013 112 466 A1, it is known that a wheel suspension comprises a wheel carrier for a wheel, which engages a subframe via wishbones and trailing arms of the wheel suspension. Another wheel suspension with upper and lower trailing arms and upper and lower wishbones is known from DE 10 2012 102 436 A1.

[0006] DE 10 2010 004 532 A1 discloses a motor vehicle in which a steering arrangement, which serves to pivotably connect a vehicle wheel to a chassis, has a plurality of steering arms. Such a steering arrangement comprises a pivoting means by which the vehicle wheel can be pivoted. A trim panel engages this pivoting means. The trim panel is movable together with the pivoting means. The trim panel has a recess or opening through which air can be supplied to a brake assigned to the vehicle wheel for cooling purposes, if necessary.

[0007] EP 2 435 288 B1 discloses a motor vehicle whose body structure has an underbody. Air deflectors are provided in the area of ​​a rear axle of the vehicle's chassis, which are mounted on a wishbone of the corresponding wheel suspension. These air deflectors serve to direct cooling air toward a fuel tank of the vehicle.

[0008] DE 10 2013 103 380 A1 discloses a wheel suspension for connecting the wheels of a motor vehicle. It features trailing arms and wishbones. A first air duct is attached to a trailing arm, and a separate second air duct is attached to a wishbone. Air can be directed toward a wheel carrier via both air ducts, each of which is attached to different control arms of the wheel suspension.

[0009] DE 10 2012 102 436 A1 discloses an independent wheel suspension for a motor vehicle without any details of cooling a brake.

[0010] DE 36 30 334 A1 discloses a motor vehicle with a recess in the area of ​​an underbody or underbody paneling. The air flowing through the recess enters a flow duct consisting of several rigid duct sections connected by flexible intermediate sections. In the area of ​​the last rigid duct section, viewed in the direction of air flow, two openings are formed that divide the air flow at the downstream end of the air duct in the area of ​​the duct section.

[0011] All designs known from the state of the art, which either cover the trailing arms and wishbones of a wheel suspension or which direct cooling air towards a wheel carrier or a brake, have either aerodynamic disadvantages or limited options for cooling the brake assigned to the respective wheel carrier or wheel.

[0012] The object of the invention is to create a novel motor vehicle with improved aerodynamics and improved brake cooling.

[0013] According to a first aspect of the invention, this object is achieved by a motor vehicle according to claim 1.

[0014] According to the first aspect of the invention, a flow guide element connected to the underbody and to the underbody paneling of the underbody is arranged upstream of the respective separate paneling part, as seen in the flow direction of the cooling air, which flow guide element, together with the paneling part, divides the air flow, namely into a first air flow which can be fed upstream of the recess of the respective paneling part via a first flow channel of the paneling part to a first region of the respective brake for cooling, and into a second air flow which can be fed via the recess of the respective paneling part and via a second flow channel of the paneling part to a second region of the respective brake for cooling.

[0015] According to the first aspect of the invention, a flow guide element is arranged in front of the respective separate covering part, which serves to cover the longitudinal control arms and transverse control arms of the respective wheel suspension, which flow guide element is connected to the underbody or the underbody covering of the underbody.

[0016] According to the first aspect of the invention, the cooling air flow is divided by the separate fairing part in interaction with the flow guide element arranged upstream of the same, namely into the first cooling air flow, which can be fed upstream of the recess of the respective fairing part via a first flow channel of the fairing part to a first region of the respective wheel or wheel carrier and thus to the brake, and into the second cooling air flow, which can be fed via the recess of the respective fairing part and via a second flow channel of the fairing part to a second region of the respective wheel or wheel carrier and thus to the brake.

[0017] By covering the control arms of the respective wheel suspension with the separate fairing part and the flow guidance element positioned in front of the separate fairing part and connected to the underbody and the underbody panel, optimal aerodynamics in the area of ​​the underbody and the wheel suspension can be ensured on the one hand, and optimal wheel cooling on the other, in particular optimal cooling of a brake assigned to the respective wheel or wheel carrier. Neither the respective separate fairing part nor the flow guidance element positioned in front of it impairs the aerodynamics in the area of ​​the underbody or the wheel suspension. The divided cooling air can be guided towards different areas of the respective wheel and thus the brake via the two flow channels provided by the fairing part, thus ensuring optimal cooling.

[0018] The first and second flow channels, together with the fairing, form a one-piece, monolithic assembly. The fact that both flow channels are provided by the respective fairing allows for particularly simple connection of the assemblies to the wheel suspension. Furthermore, aerodynamics and cooling are further improved.

[0019] According to a preferred development of the first aspect of the invention, the second flow channel of the respective trim part runs downstream of the first flow channel as seen in the flow direction of the cooling air, wherein the second cooling air flow guides air to the second region of the respective wheel and thus the brake, which is arranged behind the first region of the respective wheel and thus the brake as seen in the flow direction of the cooling air.

[0020] According to a second aspect of the invention, the object is achieved by a motor vehicle according to claim 4.

[0021] According to the second aspect of the invention, the respective separate covering part is, on the one hand, movable or flexible on a lower wishbone of the respective wheel suspension and, on the other hand, is rigidly or firmly attached to a lower longitudinal arm of the respective wheel suspension in order, on the one hand, to be movable together with these arms of the respective wheel suspension relative to the underbody and / or the underbody covering and, on the other hand, to allow a relative movement between these arms of the respective wheel suspension.

[0022] With a single fairing part in the area of ​​each wheel suspension, good aerodynamics and, on the other hand, good cooling of the wheel or wheel carrier brake can be ensured. Because each separate fairing part is mounted on the control arms either fixedly or rigidly, or movable or flexible, relative movement between the control arm and the trailing arm is possible despite the fairing part being connected to two control arms—namely, a trailing arm and a wishbone.

[0023] According to a preferred development of the second aspect of the invention, the movable or flexible fastening is effected via a rubber-elastic suspension. With such a rubber-elastic suspension, the flexible or movable fastening of the trim part can be particularly advantageously provided, preferably on the lower wishbone of the respective wheel suspension.

[0024] Preferably, both aspects of the invention are used in combination with one another on a motor vehicle in order to jointly enable improved aerodynamics and improved cooling of the brake of the respective wheel.

[0025] 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 shows a section of a motor vehicle according to the invention in the area of ​​a wheel and an underbody paneling, viewed from below; Fig. 2 shows a section of a motor vehicle according to the invention in the area of ​​a wheel carrier and a brake, viewed obliquely from above; Fig. 3 a section of a motor vehicle according to the invention analogous to Fig. 1 but without wheel; Fig. 4 the section of the Fig. 3 in a perspective view; Fig. 5 a separate panel part of the motor vehicle in a view from below; and Fig. 6 the separate covering part of the Fig. 5 in a perspective view.

[0026] The invention relates to a motor vehicle. Fig. 1 shows a section of a motor vehicle from below in the area of ​​a wheel 10 of the motor vehicle.

[0027] The Fig. 1 visible wheel 10 is connected to a chassis 12 of the motor vehicle via a wheel suspension 11, which has a wheel carrier 15 as well as lower trailing arms 25u and upper trailing arms as well as lower wishbones 24u and upper wishbones. The wheel carrier 15 as well as the trailing arms 25u and wishbones 24u are in Fig. 1 not visible, but especially in Fig. 3 and Fig. 4.

[0028] Chassis 12 and wheel suspension 11 are part of a so-called running gear of the motor vehicle.

[0029] The terms "lower trailing arms," ​​"lower wishbones," and "upper trailing arms" and "upper wishbones" refer to the installation of the trailing arms 25u and wishbones 24u on the vehicle. Lower arms 24u and 25u are positioned closer to the road surface than upper arms. The lower arms 24u and 25u can also be referred to as "first arms," ​​and the upper arms as "second arms." The upper arms are not shown in the figures for clarity.

[0030] Fig. 1, Fig. 3 and Fig. 4 further show an underbody panel 13 of the motor vehicle, which covers the underbody of a body structure of the motor vehicle. This underbody panel 13 exposes the wheel suspension 11 of the wheel 10, in particular the trailing arms 25u and transverse arms 24u of the respective wheel suspension 11, which together form a control arm arrangement.

[0031] The control arm arrangement or the longitudinal control arms 25u and transverse control arms 24u of the respective wheel suspension 11 are according to Fig. 1, Fig. 3 and Fig. 4 covered by a separate covering part 14.

[0032] Fig. 2, Fig. 4 each show a detail of the arrangement of the Fig. 1 in a view obliquely from above, where in Fig. 2 the separate covering part 14 as well as a wheel carrier 15 for the wheel 10 and a spring-damper system 16 for the wheel 10 are shown. Fig. 2 further shows components of a brake 17 associated with the respective wheel carrier 15 of the wheel 10, namely a brake calliper 18 and a brake disc 19 of the brake 17. In Fig. 4 the longitudinal control arms 25u and transverse control arms 24u are particularly visible.

[0033] The covering part 14 has a recess 20 in a flow-guiding surface 30, through which air or cooling air can be supplied to the wheel 10 or the wheel suspension 15 of the wheel 10 and thus to the brake 17 associated with the wheel 10 or wheel suspension 15. This recess 20 communicates with a flow channel 21 of the covering part 14, which has a curved or bent contour and according to Fig. 2 a first cooling air flow leads towards the brake 17.

[0034] The flow-guiding surface 30 of the covering part 14, into which the recess 20 is made, faces a roadway in the installed situation and extends in the plane or approximately in the plane of the underbody or the underbody covering 13.

[0035] Viewed in the direction of air flow or cooling air, a flow guide element 22 connected to the underbody or underbody panel 13 is arranged upstream of the separate panel part 14. This flow guide element 22, together with an upstream edge 28 of the respective panel part 14, divides the air flow or cooling air flow.

[0036] A first air flow or cooling air flow, which is branched off upstream of the recess 20 of the covering part 14 between the covering part 14 and the flow guide element 22, can be fed via a first flow channel 23 of the covering part 14 to a first region of the respective wheel and thus to the brake 17, in particular to the brake caliper 18 of the brake 17.

[0037] Between the upstream edge 28 of the covering part 14 and the flow guide element 22 positioned upstream thereof, an opening 29 is formed, via which the first air flow or cooling air flow can be fed to the first flow channel 23 of the covering part 14.

[0038] How best Fig. 2, Fig. 3 and Fig. 4, the flow guide element 22 defines a ramp-like flow guide surface, specifically such that, viewed in the flow direction of the air or cooling air, the distance between the ramp-like flow guide surface of the flow guide element 22 and the underbody paneling 13 increases. The ramp-like flow guide surface of the flow guide element 22 forms an inlet funnel for the first flow channel 23 of the paneling part 14.

[0039] The aforementioned air flow or cooling air flow guided via the recess 20 of the respective trim part 14, which is referred to below as the second air flow or cooling air flow, can be fed via the aforementioned flow channel 21, which is referred to below as the second flow channel 21, to a second region of the respective wheel and thus to the brake 17, preferably to a region of the brake disc 19 of the brake 17.

[0040] Both flow channels 21 and 23 are integral components of the trim part 14. Both flow channels 21 and 23 are formed on a side of the trim part 14 opposite the flow-guiding surface 30. Both flow channels 21 and 23 of the trim part 14 each have a curved contour. The second flow channel 21, which communicates with the recess 20, runs downstream of the first flow channel 23, as seen in the flow direction. The first flow channel 23 communicates with the flow guide element 22 and the opening 29 between the flow guide element 22 and the trim part 14.

[0041] The first flow guide channel 23, which communicates with the flow guide element 22, guides the first air flow or cooling air flow into the area of ​​the Fig. 2 shown brake caliper 18 of the brake 17.

[0042] The second flow channel 21, which communicates with the recess 20 of the covering part 14, guides the second air flow or cooling air flow to a region of the brake disc 19 of the brake 17 spaced therefrom.

[0043] In the area of Fig. Accordingly, two interacting assemblies are positioned on the wheel 10 shown in Figure 1, which, on the one hand, optimize the aerodynamics in the area of ​​the respective wheel 10 and, on the other hand, the cooling air flow. The control arms 25 and the longitudinal control arms 24 of the respective wheel suspension 11 are aerodynamically covered by the cover part 14. The flow guide element 22, connected to the underbody panel 13 or the underbody, is positioned upstream of this cover part 14.

[0044] The flow guide element 22, together with the covering part 14, divides the air flow or cooling air flow, namely into the first air flow or cooling air flow, which is supplied to the first region of the brake 17 upstream of the recess 20 of the covering part 14 via the first flow channel 23 of the covering part 14, and into the second air flow or cooling air flow, which is supplied to a second region of the brake 17 via the recess 20 of the covering part 14 and the second flow channel 21.

[0045] The two flow channels 21 and 23 are an integral part of the covering part 14. Only two assemblies have to be installed in the area of ​​the respective wheel 10, namely the respective covering part 14 and the respective flow guide element 22 as a component of the underbody covering.

[0046] The respective trim part 14 is mounted on the control arm assembly of the respective wheel suspension 11 and the respective flow guide element 22 is mounted on the underbody or the underbody trim 13 or is a component thereof or is integrated into it.

[0047] The invention therefore enables a simple covering of chassis components and improves aerodynamics. Furthermore, it improves the ventilation and thus cooling of the respective brakes with minimal impact on aerodynamics.

[0048] As already explained, the respective trim part 14 is connected to the control arm assembly of the respective wheel suspension 11 of the respective wheel 10. The respective trim part 14 is attached, on the one hand, to a transverse control arm 25 of the respective wheel suspension 11 and, on the other hand, to a longitudinal control arm 24 of the respective wheel suspension 11.

[0049] The respective trim part 14 is attached to one of these links in a fixed or rigid manner and to another of these links in a movable or flexible manner. This allows the trim part 14, together with the links 24, 25 of the respective wheel suspension 11, to move relative to the underbody of the underbody panel 13. This also allows relative movement between the links 24u, 25u of the wheel suspension 11, i.e., between the trailing arm and the transverse arm.

[0050] The respective trim part 14 is movably or flexibly attached to a lower wishbone 24u of the respective wheel suspension 11 and is fixedly or rigidly attached to a lower trailing arm 25u of the respective wheel suspension 11. The movable or flexible attachment of the respective trim part 14 to the lower wishbone 24u of the respective wheel suspension 11 is preferably effected via a rubber-elastic suspension 26.

[0051] The two flow channels 21 and 23, which guide air to different areas of the respective brake 17, are an integral part of the respective cover part 14, which also forms the flow-guiding surface 30, wherein this flow-guiding surface 30 covers the respective wheel suspension 11. The respective cover part 14 is attached to two control arms 24u, 25u of the respective wheel suspension 11, which move relative to each other. This allows for advantageous aerodynamic coverage of the respective wheel suspension 11 and cooling of the respective brake 17.

Claims

[1] Motor vehicle, with a chassis, wherein the chassis comprises a chassis (12) and wheel suspensions (11) comprising longitudinal control arms (25u) and transverse control arms (24u) for connecting wheels (10) to the chassis (12), with a body structure comprising an underbody and / or an underbody panel (13), which and / or which leaves the control arms (24u, 25u) of the wheel suspensions (11) free, with covering parts (14) for the control arms (24u, 25u) of the wheel suspensions (11), wherein the longitudinal control arms (25u) and the transverse control arms (24u) of the respective wheel suspension (11) are covered by a respective single, separate covering part (14) in the area of the respective wheel suspension, wherein the respective covering part (14) has a recess (20) through which air can be supplied to a brake (17) assigned to the respective wheel (10) for cooling purposes, characterized by , that viewed in the direction of air flow, upstream of the respective separate trim part (14) there is arranged a flow guide element (22) connected to the underbody or the underbody trim (13), which divides the air flow together with the trim part (14), namely into a first air flow, which can be fed upstream of the recess (20) via a first flow channel (23) of the covering part (14) to a first region of the respective brake (17), wherein the first flow channel (23) of the respective covering part (14) communicates with the flow guide element (22) arranged in front of the respective separate covering part (14) as seen in the direction of air flow, and with an opening (29) formed between an upstream edge (28) of the respective covering part (14) and the flow guide element (22) arranged in front of the respective separate covering part (14) as seen in the direction of air flow, and into a second air flow, which can be fed to a second region of the respective brake (17) via the recess (20) of the respective trim part (14) and via a second flow channel (21) of the trim part (14), wherein the second flow channel (21) of the respective trim part (14) communicates with the recess (20) of the respective trim part (14), the respective first flow channel (23) and the respective second flow channel (21) together with the respective cladding part (14) are designed as a one-piece, monolithic assembly. [2] Motor vehicle according to claim 1, characterized bythat the second flow channel (21) of the respective covering part (14) runs downstream of the first flow channel (23) of the respective covering part (14) as seen in the direction of air flow and the second air flow leads to the second region of the respective brake (17), which is arranged downstream of the first region of the respective brake (17) as seen in the direction of air flow. [3] Motor vehicle claim 1 or 2, characterized by that the same is designed in the sense of one of claims 4 to 5. [4] Motor vehicle, with a chassis, wherein the chassis comprises a chassis (12) and wheel suspensions (11) comprising longitudinal control arms (25u) and transverse control arms (24u) for connecting wheels (10) to the chassis (12), with a body structure having an underbody and / or an underbody panel (13) which leaves the control arms (24u, 25u) of the wheel suspensions (11) free, with covering parts (14) for the control arms (24u, 25u) of the wheel suspensions (11), wherein the longitudinal control arms (25u) and the transverse control arms (24u) of the respective wheel suspension (11) are covered by a respective single, separate covering part (14) in the area of the respective wheel suspension, wherein the respective covering part (14) has a recess (20) through which air can be supplied to a brake (17) assigned to the respective wheel (10) for cooling purposes, characterized by , that the respective separate covering part (14) is, on the one hand, movable or flexible to a lower wishbone (24u) of the respective wheel suspension (11) and, on the other hand, is fixed or rigidly attached to a lower longitudinal control arm (25u) of the respective wheel suspension (11) in order, on the one hand, to be movable together with these control arms of the respective wheel suspension (11) relative to the underbody and / or the underbody covering (13) and, on the other hand, to allow a relative movement between these control arms of the respective wheel suspension (11). [5] Motor vehicle according to claim 4, characterized by that the movable or flexible fastening is effected via a rubber-elastic suspension (26).

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