motor vehicle, in particular motor car
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- BAYERISCHE MOTOREN WERKE AG
- Filing Date
- 2023-02-08
- Publication Date
- 2026-07-23
AI Technical Summary
Existing motor vehicles face challenges in achieving advantageous noise behavior and driving comfort, particularly in electric vehicles without internal combustion engines, while minimizing weight and cost through additional insulation materials.
The design of a motor vehicle with wheel arch liners attached to the wheel suspension, bypassing the body, creating a large air gap between overlapping wheel arch shells to absorb noise without additional weight-intensive insulation materials.
Achieves effective acoustic insulation and improved driving comfort by maximizing the cavity volume between wheel arch shells, reducing noise without excessive weight or cost.
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
[0001] The invention relates to a motor vehicle, in particular a motor vehicle, according to the preamble of patent claim 1.
[0002] US 5 681 072 A1 and EP 0 677 429 B1 disclose a sound absorber for motor vehicles in the form of a double-walled, flat resonator, wherein the sound absorber is designed as a wheel house lining. Furthermore, DE 10 2015 008 728 A1 discloses a motor vehicle body with a longitudinal member and a wheel assembly supported thereon, comprising at least two shells. Furthermore, a vehicle body is known from EP 2 399 806 B1.
[0003] The object of the present invention is to create a motor vehicle so that a particularly advantageous noise behavior can be realized.
[0004] This object is achieved according to the invention by a motor vehicle having the features of patent claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.
[0005] The invention relates to a motor vehicle, also simply referred to as a vehicle and preferably designed as a motor vehicle, in particular a passenger car, whose interior, also referred to as a passenger cell or passenger compartment, is formed by a body of the motor vehicle, preferably designed as a self-supporting body. While the motor vehicle is traveling, persons such as the driver of the motor vehicle can remain in the interior. The motor vehicle has at least one vehicle wheel, also simply referred to as a wheel, which is articulated to the body via a wheel suspension of the motor vehicle and is thus held on the body so as to be movable relative to the body, at least in the vertical direction of the motor vehicle.For example, the motor vehicle has at least or exactly two axles arranged consecutively and thus one behind the other in the longitudinal direction of the motor vehicle, also referred to as vehicle axles. Each vehicle axle has at least or exactly two vehicle wheels of the motor vehicle, whereby the vehicle wheels are also simply referred to as wheels. One of the vehicle wheels is the aforementioned at least one vehicle wheel. When reference is made above and below to the wheel or the vehicle wheel, this means, unless otherwise stated, the at least one vehicle wheel which is articulated to the body via the wheel suspension. The respective vehicle wheel of the motor vehicle is a respective ground contact element of the motor vehicle, which can be or is supported on a ground downwards in the vertical direction of the motor vehicle via the respective ground contact element.If the motor vehicle is driven along the ground while being supported vertically and downwards by the respective ground contact element, the respective ground contact element rolls, in particular directly, on the ground. The vehicle wheel can perform compression and rebound movements in the vertical direction of the vehicle and relative to the body, since the vehicle wheel is connected to the body in an articulated manner. In particular, the wheel suspension comprises a spring and / or damper element, via which the vehicle wheel is supported on the body in a spring-loaded and / or damped manner.
[0006] The motor vehicle additionally has at least one wheel house, also referred to as a wheel arch or wheel installation, which delimits, in particular directly delimits, a receiving area in which the vehicle wheel is at least partially arranged. The wheel house, also referred to, for example, as a wheel house lining or wheel shell lining, has a first wheel house shell facing the vehicle wheel. Furthermore, the wheel house has a second wheel house shell, which is arranged on a side of the first wheel house shell facing away from the vehicle wheel. Thus, for example, the first wheel house shell is arranged on a side of the second wheel house shell facing the vehicle wheel and the first wheel house shell. Very particularly, the wheel house shells are formed separately from one another. At least respective partial regions of the wheel house shells overlap one another.Preferably, the respective partial region is at least a predominant partial region of the respective wheel house liner, i.e., more than half of the respective wheel house liner, so that the wheel house liners, also referred to simply as shells, preferably overlap one another at least predominantly, i.e., at least more than half or completely. The mutually overlapping partial regions of the wheel house liners are spaced apart from one another over their respective, at least predominant, in particular over their respective, complete, extent, forming a cavity arranged between the wheel house liners, filled with air and also referred to as an intermediate space or air gap.Thus, for example, the cavity is delimited in a first direction, in particular directly, by the second, outer wheel house shell in a first direction pointing away from the vehicle wheel and from the first, into a wheel house shell and pointing towards the outer, second wheel house shell, and for example, the cavity is delimited in a second direction opposite to the first direction, pointing away from the outer, second wheel house shell and pointing towards the first, inner wheel house shell and towards the vehicle wheel, in particular directly, by the first wheel house shell.
[0007] In order to be able to achieve particularly advantageous noise behavior and thus particularly high driving comfort, particularly for persons staying in the interior of the motor vehicle, also referred to as occupants, it is provided according to the invention that the first, inner wheel house shell is designed as a wheel-side wheel house shell which is fastened to the wheel suspension, in particular bypassing the second wheel house shell, and is thus movable with the vehicle wheel at least in the vertical direction of the vehicle relative to the body and relative to the second wheel house shell.The feature that the first wheel house liner is preferably attached to the wheel suspension bypassing the second wheel house liner means that the first wheel house liner is not attached to the wheel suspension via the second wheel house liner, but rather the first wheel house liner is attached to the wheel suspension without being attached to the wheel suspension via the second wheel house liner. If, for example, the vehicle wheel performs compression and rebound movements in the vertical direction of the vehicle and relative to the body while the motor vehicle is traveling, the first wheel house liner moves with the vehicle wheel, so that the first wheel house liner also carries out the compression and rebound movements of the vehicle wheel, at least in the vertical direction of the vehicle and relative to the body, and thus moves with the vehicle wheel in the vertical direction of the vehicle relative to the body, in particular moves back and forth.Since, for example, the vehicle wheel is part of a vehicle axle, also referred to as the axle, of the motor vehicle, the first wheel house liner is also referred to as the axle-side wheel house liner. By attaching the first wheel house liner to the wheel suspension, the first wheel house liner is connected to the wheel suspension, in particular bypassing the second wheel house liner. By connecting the first wheel house liner to the wheel suspension in this way, it is possible to advantageously arrange the wheel house liners of the wheel house widely spaced from one another, whereby a particularly large width or height of the cavity running in the first direction or in the second direction, and thus a particularly large volume of the cavity, can be realized.As a result, the wheelhouse can provide particularly good acoustic insulation, thus providing particularly advantageous acoustic insulation, without the need for additional, weight- and cost-intensive insulation materials, or without the need for an excessively large number or quantity of such additional insulation materials. The background to the invention is, in particular, that with the increasing electrification of motor vehicles and rising demands for comfort, it is becoming increasingly challenging to achieve advantageous and comfortable noise behavior in the interior, thus creating pleasant, comfortable interior acoustics. In this regard, the use of insulation material with which wheelhouses could be lined would be possible.This allows for the attenuation or insulation of noises caused by the vehicle wheel during a journey, particularly by a tire rolling on the road, for passengers in the interior. Noises resulting from objects such as stones being thrown from the vehicle wheel and against the wheel house during a journey can also be attenuated or insulated. As the increasing electrification of motor vehicles eliminates noises caused by an internal combustion engine powering the respective vehicle during a journey, since vehicles are no longer equipped with internal combustion engines, achieving favorable noise levels in the interior is becoming increasingly challenging.However, the use of additional insulating material can result in excessive weight and excessive cost for the motor vehicle. The invention now makes it possible to arrange the wheel house liners particularly far apart from one another, thus creating a particularly large cavity volume. This allows for acoustic, and therefore noise-related, air gap insulation, which can prevent unpleasant and / or excessively loud noises in the interior. This can be made possible by the invention without providing the wheel house with an excessively large number or quantity of additional insulating material and / or without using an excessively thick and thus excessively costly and weight-intensive insulating material with which the wheel house is provided and which is arranged, for example, in the cavity.Thus, the invention makes it possible to realize advantageous noise behavior in a cost- and weight-effective manner, particularly in the interior of the motor vehicle.
[0008] In order to be able to realize a particularly large volume of the cavity and thus a particularly advantageous noise behavior in a particularly cost- and weight-effective manner, it is provided in one embodiment of the invention that the second, body-side wheel house liner is a part, thus a component, of the body.
[0009] It has also proven particularly advantageous if the second, body-side wheel house liner is designed separately from the body and secured to the body. This allows for a particularly large cavity volume to be realized in a particularly cost- and weight-efficient manner, thus achieving particularly good interior acoustics.
[0010] In a further, particularly advantageous embodiment of the invention, the wheel suspension has a wheel carrier on which the vehicle wheel is rotatably mounted relative to the wheel carrier, in particular about a wheel rotation axis. The wheel suspension also has at least one check arm, which is also referred to as a wheel control arm, guide arm or control arm. The wheel carrier and thus the vehicle wheel are connected to the body via the check arm so that they can move relative to the body at least in the vertical direction of the vehicle. In other words, the check arm allows movements in the vertical direction of the vehicle and relative to the body, such as the aforementioned compression and rebound movements of the vehicle wheel and the wheel carrier. For this purpose, for example, the check arm is connected to the body at least indirectly and pivotably.
[0011] It has proven particularly advantageous if the first wheel housing liner is attached to the control arm, bypassing the wheel carrier, so that the wheel housing liner is not attached to the control arm, or is not attached solely via the wheel carrier. This allows the wheel housing liners to be spaced particularly far apart, allowing for a particularly large cavity volume and thus particularly favorable noise behavior.
[0012] A further embodiment is characterized by the fact that the first wheel housing liner is attached to the wheel carrier bypassing the check rail, i.e., not or not only via the check rail, allowing the wheel housing liners to be spaced particularly far apart. As a result, a particularly large cavity volume and thus particularly favorable noise behavior can be ensured.
[0013] In a further, particularly advantageous embodiment of the invention, it is provided that the wheel house has at least one inlet opening, also referred to as the first through-flow opening, which opens at one end into the surroundings of the motor vehicle and at the other end into the cavity, and through which air flowing towards the motor vehicle when the motor vehicle is traveling forward and thus resulting from the airstream can flow, whereby the air can be introduced into the cavity via the inlet opening. On the one hand, this can, for example, achieve particularly advantageous noise behavior. On the other hand, this can, for example, make it possible to use the cavity, also referred to as the intermediate space, aerodynamically in order to, for example, avoid excessive soiling and / or to achieve advantageously low air resistance for the motor vehicle as a whole.
[0014] It has proven particularly advantageous if the wheel house has at least one outlet opening, one end of which opens into the surroundings of the motor vehicle and the other end into the cavity, spaced from the inlet opening, provided in addition to the inlet opening, and also referred to as a second throughflow opening. Air from the cavity can flow through this outlet opening, so that the air from the cavity can be discharged into the surroundings via the outlet opening. On the one hand, this can achieve particularly advantageous noise behavior. On the other hand, it can, for example, make aerodynamically advantageous use of the intermediate space (cavity).
[0015] Finally, it has proven particularly advantageous if the motor vehicle is designed as an electric vehicle, in particular as a battery-electric vehicle (BEV). The background to this embodiment is that, particularly in electric vehicles, achieving advantageous noise behavior in the interior is very challenging, since the electric vehicle does not have an internal combustion engine intended to drive the motor vehicle and thus causes noise while the motor vehicle is traveling that can mask other unpleasant noises. Despite the omission of such an internal combustion engine intended to drive the motor vehicle, the invention can achieve particularly advantageous acoustic insulation of the interior in a cost- and weight-effective manner, thus ensuring particularly advantageous noise behavior for people inside the interior.
[0016] Further details of the invention will become apparent from the following description of a preferred embodiment with the accompanying drawings. In the drawings: Fig. 1 is a schematic perspective view of a motor vehicle designed as an electric vehicle and a passenger car; Fig. 2 a schematic and sectional side view of a wheel house of the motor vehicle; and Fig. 3 a schematic rear view of a wheel suspension and a vehicle wheel of the motor vehicle.
[0017] In the figures, identical or functionally identical elements are provided with the same reference numerals.
[0018] Fig. 1 shows a schematic perspective view of a motor vehicle 1, also referred to simply as a vehicle, whose interior 2, also referred to as a passenger cell or passenger compartment, is formed by a structure 3 of the motor vehicle 1 designed as a self-supporting body. Fig. In the exemplary embodiment shown in Figure 1, the motor vehicle 1 is a passenger car, the motor vehicle 1 is an electric vehicle, in particular a battery-electric vehicle (BEV). This means that the motor vehicle 1 is free of an internal combustion engine provided for driving the motor vehicle 1. The motor vehicle 1 has, in this case precisely, two vehicle axles arranged one after the other in the longitudinal direction of the motor vehicle and thus spaced from one another, simply also referred to as axles, namely a first vehicle axle 4 and a second vehicle axle 5. The second vehicle axle 5 is arranged behind the vehicle axle 4 in the longitudinal direction of the motor vehicle 1. The longitudinal direction of the motor vehicle 1 is illustrated by a double arrow 6. The respective vehicle axle 4, 5 has, in this case precisely, two vehicle wheels, which are also referred to as wheels.The respective vehicle wheels of the respective vehicle axle 4, 5 are arranged on opposite sides of the motor vehicle 1 in the transverse direction of the vehicle, wherein the transverse direction of the vehicle is illustrated by a double arrow 7. In . Fig. 1 shows one of the vehicle wheels of axle 4 and is labelled 8. In addition, Fig. 1 of one of the vehicle wheels of the vehicle axle 5 can be seen and designated by 9. In the following, reference is made to the vehicle wheel 8, whereby the following and previous statements regarding the vehicle wheel 8 can also be readily transferred to the vehicle wheel 9 and the other vehicle wheels of the motor vehicle 1 and vice versa. The vehicle wheels of the motor vehicle 1 are ground contact elements of the motor vehicle 1, which are mounted downwards in the vertical direction of the motor vehicle 1 on a Fig. 1 is supported or supported on the floor 10, which is illustrated particularly schematically. The vertical direction of the motor vehicle 1 is illustrated by a double arrow 11. If the motor vehicle 1 is driven along the floor 10 while the motor vehicle 1 is supported downwards in the vertical direction of the motor vehicle 1 via the ground contact elements on the floor 10, the ground contact elements roll, in particular directly, on the floor 10.
[0019] Using the example of the vehicle wheel 8, it can be seen and described below that the motor vehicle 1 has a wheel house 12 associated with the vehicle wheel 8, also referred to as a wheel housing or wheel shell. The wheel house 12 defines a receiving area 22 in which the vehicle wheel 8 is at least partially received. The wheel house 12 is in Fig. 2 in a schematic and sectional side view. From Fig. 2 that the wheel house 12 has an inner wheel house shell 13 facing the vehicle wheel and a second, outer wheel house shell 14 which is arranged on a side S1 of the first, inner wheel house shell 13 facing away from the vehicle wheel 8. At least respective partial regions of the wheel house shells 13 and 14 overlap one another. In the exemplary embodiment shown in the figures, it is provided that the wheel house shells 13 and 14 completely overlap one another. The mutually overlapping partial regions of the wheel house shells 13 and 14 or - in the exemplary embodiment shown in the figuresshown embodiment - the mutually overlapping wheel house shells 13 and 14 are arranged at a distance from one another over their respective, at least predominant, in this case complete, extent, forming a cavity 15 arranged between the wheel house shells 13 and 14, also referred to as an intermediate space, which is, in particular, completely filled with air and is therefore also referred to as an air gap or air space.
[0020] Out of Fig. 3 that the motor vehicle 1 has a wheel suspension 16 assigned to the vehicle wheel 8, via which the vehicle wheel 8 is articulatedly connected to the body 3, i.e., is articulatedly coupled to the body 3, whereby the vehicle wheel 8 is movable at least in the vertical direction of the motor vehicle 1 relative to the body 3 and can thus execute compression and rebound movements in the vertical direction relative to the body 3. For this purpose, the wheel suspension 16 comprises a wheel carrier 17, on which the vehicle wheel 8 is mounted so as to be rotatable about a wheel rotation axis 18 relative to the wheel carrier 17. If the motor vehicle 1 is driven along the ground 10 while the motor vehicle 1 is supported downwards in the vertical direction of the vehicle via the vehicle wheel 8 on the ground 10, the vehicle wheel 8 rolls, in particular directly, on the ground 10, and the vehicle wheel 8 rotates about the wheel rotation axis 18 relative to the wheel carrier 17 and also relative to the body 3.The wheel rotation axis 18 runs, for example, obliquely or perpendicularly to the vehicle's vertical direction when the motor vehicle 1 is stationary. The wheel suspension 16 also comprises wheel check arms 19 and 20, via which the wheel carrier 17 and thus the vehicle wheel 8 are connected to the body 3 so as to be movable, at least in the vehicle's vertical direction, relative to the body 3. For this purpose, the respective wheel check arm 19, 20 is coupled to the body 3 so as to be pivotable about a respective first pivot axis SA1 relative to the body 3. On the other hand, the respective wheel check arm 19, 20 is coupled to the wheel carrier 17 so as to be pivotable about a respective second pivot axis SA2 spaced from the respective first pivot axis SA1 relative to the wheel carrier 17.If the vehicle wheel 8 executes the movements in the vehicle's vertical direction relative to the body 3, in particular the compression and rebound movements, the respective wheel guide 19, 20 is pivoted about the respective pivot axis SA1 relative to the body 3 and about the respective pivot axis SA2 relative to the wheel carrier 17. This can be seen in . Fig. 3 is also that the wheel suspension 16 has, for example, a damping element 21 designed as a hydraulic shock absorber, by means of which the movements of the wheel carrier 17 and the vehicle wheel 8 in the vehicle vertical direction and relative to the body 3 are damped.
[0021] In order to realize a particularly large volume of the cavity 15 and thus advantageously insulate or dampen noises caused by the vehicle wheel 8 during a respective journey of the motor vehicle 1 and emitted by the vehicle wheel 8 and consequently to ensure a particularly advantageous noise behavior in the interior 2, the first wheel housing liner 13 is designed as a wheel-side wheel housing liner, which, in particular bypassing the outer, second wheel housing liner 14, is fastened to the wheel suspension 16 and is thus movable with the vehicle wheel 8 at least in the vehicle vertical direction relative to the body 3 and relative to the second wheel housing liner 14. Fig.3 shows that in the exemplary embodiment shown in the figures, the first wheel housing liner 13 is attached to the check arm 19, bypassing the wheel carrier 17 and also bypassing the wheel housing liner 14, and is thus movable with the check arm 19. Alternatively, the wheel housing liner 13 could be attached to the wheel carrier 17, in particular bypassing the check arms 19 and 20, or the wheel housing liner 13 could, for example, be attached to the check arm 20, bypassing the wheel carrier 17 and bypassing the check arm 19.
[0022] The second, outer wheel house liner 14 is a body-side wheel house liner, which in a first variant is part of the body 3 and thus a body component. In the second variant, the second, body-side wheel house liner 14 is formed separately from the body 3 and is attached at least indirectly, in particular directly, to the body 3, in particular in such a way that relative movements between the body 3 and the wheel house liner 14 are prevented. List of reference symbols 1 motor vehicle 2 Interior 3 Structure 4 vehicle axles 5 vehicle axle 6 double arrow 7 Double arrow 8 vehicle wheel 9 Vehicle wheel 10 Floor 11 Double arrow 12 wheel house 13 Wheel house liner 14 wheel house liner 15 cavity 16 Wheel suspension 17 wheel carriers 18 Wheel rotation axis 19 wheel controls 20 wheel handlebars 21 Damper element 22 Recording area S1 page SA1 first swivel axis SA2 second swivel axis QUOTES CONTAINED IN THE DESCRIPTION
[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature
[0000] US 5681072 A1
[0002] EP 0677429 B1
[0002] DE 102015008728 A1
[0002] EP 2399806 B1
[0002]
Claims
[1] Motor vehicle (1), with an interior space (2) formed by a body (3) of the motor vehicle (1), with at least one vehicle wheel (8) which is connected to the body (3) in an articulated manner via a wheel suspension (16) and is thereby movable relative to the body (3) at least in the vertical direction (11) of the vehicle, and with at least one wheel house (12) which delimits a receiving area (22) in which the vehicle wheel (8) is at least partially arranged, said wheel house having a first wheel house shell (13) facing the vehicle wheel (8) and a second wheel house shell (14) arranged on a side (S1) of the first wheel house shell (13) facing away from the vehicle wheel (8), wherein at least respective partial areas of the wheel house shells (13, 14) overlap one another and are arranged at a distance from one another at least over their respective, at least predominant extent, forming an air-filled cavity (15) arranged between the wheel house shells (13, 14). are, characterized bythat the first, wheel-side wheel housing liner (13) is fastened to the wheel suspension (16) and is thereby movable with the vehicle wheel (8) at least in the vehicle vertical direction (11) relative to the body (3) and relative to the second wheel housing liner (14). [2] Motor vehicle (1) according to claim 1, characterized by that the second, body-side wheel house liner (14) is part of the body (3). [3] Motor vehicle (1) according to claim 1, characterized by that the second, body-side wheel house liner (14) is formed separately from the body (3) and held on the body (3). [4] Motor vehicle (1) according to one of the preceding claims, characterized by that the wheel suspension (16) has: - a wheel carrier (17) on which the vehicle wheel (8) is rotatably mounted; and - at least one wheel guide (19), via which the wheel carrier (18) and thereby the vehicle wheel (8) are connected to the body (3) so as to be movable at least in the vehicle vertical direction (11) relative to the body (3). [5] Motor vehicle (1) according to claim 4, characterized by that the first wheel housing liner (13) is fastened to the wheel guide (19) bypassing the wheel carrier (17). [6] Motor vehicle (1) according to claim 4 or 5, characterized by that the first wheel housing liner (13) is fastened to the wheel carrier (18) bypassing the wheel guide (19). [7] Motor vehicle (1) according to one of the preceding claims, characterized by in that the wheel house (12) has at least one inlet opening which opens at one end into the surroundings of the motor vehicle (1) and at the other end into the cavity (15), through which air flowing towards the motor vehicle (1) when the motor vehicle (1) is traveling forward can flow and which can be introduced into the cavity (15) via the inlet opening. [8] Motor vehicle (1) according to claim 7, characterized by that the wheel house (12) has at least one outlet opening which opens at one end into the surroundings of the motor vehicle (1) and at the other end into the cavity (15), is spaced from the inlet opening and is provided in addition to the inlet opening, through which the air from the cavity (15) can flow, from which the air can be discharged into the surroundings via the outlet opening. [9] Motor vehicle (1) according to one of the preceding claims, characterized by that the motor vehicle (1) is designed as an electric vehicle.