Spoiler for a motor vehicle

Abstract

Spoilers, especially rear spoilers, for a motor vehicle, with a spoiler body (14) for deflecting an airflow to provide an aerodynamic effect and a multi-joint actuating kinematics (34) for relocating the spoiler body (14) between a storage position and a usage position, wherein the spoiler body (14) has a main spoiler (16) having a main surface (21) and an auxiliary spoiler (18) having an auxiliary surface (62) which is movable relative to the main spoiler (16) by means of the actuating kinematics (34), wherein the auxiliary surface (62) of the auxiliary spoiler (18) in the storage position is positioned outside the main spoiler (16) at least partially in the direction of gravity below the main spoiler (16) and the auxiliary surface (62) of the auxiliary spoiler (18) in the use position is positioned substantially in a common plane with the main surface (21), wherein the auxiliary spoiler (18) can be moved past the main spoiler (16) by the actuating kinematics (34) during a movement between the storage position and the operating position outside the main spoiler (16). characterized by the fact that the actuating kinematics (34) has a drive link (40) which is displaceable and / or pivotable by a drive unit, wherein a first connecting link (42) and a second connecting link (44) are articulated to the drive link (40), wherein a connecting link (46) connected to the main spoiler (16) is articulated to the first connecting link (42) and to the second connecting link (44).

Description

[0001] The invention relates to a spoiler, in particular a rear spoiler, for a motor vehicle, with the aid of which an aerodynamic effect, for example an increase in contact pressure by deflecting the airstream, can be provided.

[0002] EP 1 118 529 A2 discloses a rear spoiler comprising a spoiler body that can be displaced between a storage position and a use position by means of a translationally extendable adjustment unit. The spoiler body comprises a main spoiler that can be displaced by the adjustment unit and an auxiliary spoiler accommodated in a cavity of the main spoiler. The auxiliary spoiler can be extended from the main spoiler along a linear guide by means of a lever drive provided within the main spoiler.

[0003] From FR 2 874 579 A1, a spoiler is known which can be linearly displaced between a storage position and a use position by means of a lifting piston, wherein an actuating kinematics is coupled to the lifting piston, which can extend an auxiliary spoiler provided on an underside of the spoiler in order to increase the aerodynamically effective surface in the use position.

[0004] There is a constant need to improve the aerodynamic effect of a spoiler through easily implemented design measures.

[0005] The object of the invention is to show measures that enable a structurally simple spoiler with a good aerodynamic effect.

[0006] The object is achieved according to the invention by a spoiler having the features of claim 1. Preferred embodiments of the invention are specified in the subclaims, which may each individually or in combination represent an aspect of the invention.

[0007] According to the invention, a spoiler, in particular a rear spoiler, is provided for a motor vehicle, comprising a spoiler body for deflecting an air flow to provide an aerodynamic effect and multi-joint actuating kinematics for displacing the spoiler body between a storage position and a use position, wherein the spoiler body comprises a main spoiler having a main surface and an auxiliary spoiler having an auxiliary surface that is movable relative to the main spoiler with the aid of the actuating kinematics, wherein the auxiliary surface of the auxiliary spoiler is positioned outside the main spoiler in the storage position at least partially below the main spoiler in the direction of gravity, and the auxiliary surface of the auxiliary spoiler is positioned in the use position substantially in a common plane with the main surface,wherein the auxiliary spoiler is movable past the main spoiler by the actuating kinematics during a movement between the storage position and the use position outside the main spoiler, wherein the actuating kinematics comprises a drive link that can be displaced and / or pivoted by a drive unit, wherein a first connecting link and a second connecting link are articulated to the drive link, wherein a connecting link connected to the main spoiler is articulated to the first connecting link and to the second connecting link.

[0008] The main spoiler and the auxiliary spoiler can essentially be designed as separate structural units of the spoiler body. In particular, it is essentially unnecessary to adapt the main spoiler to the geometry of the auxiliary spoiler or vice versa. In particular, it is not necessary to provide space within the main spoiler to accommodate the auxiliary spoiler and / or kinematics for displacing the auxiliary spoiler relative to the main spoiler. This allows the main spoiler and the auxiliary spoiler to be constructed in a simpler manner and dimensioned to save space. The movement of the main spoiler relative to the auxiliary spoiler is coupled entirely outside the spoiler body by a suitable kinematic connection of the main spoiler and the auxiliary spoiler to the actuating kinematics.In this respect, the spoiler body is designed in at least two parts, with the main spoiler and the auxiliary spoiler in particular always being separated from each other by a gap. By means of links that are suitably articulated to the main spoiler or the auxiliary spoiler, which are articulated to the actuating kinematics, a relative movement of the links of the actuating kinematics can be translated into a relative movement of the auxiliary spoiler to the main spoiler. This allows the auxiliary spoiler to be moved past the main spoiler without colliding with the main spoiler, in order to increase the surface area of ​​the spoiler body exposed to airflow in the use position. The separate and essentially independent coupling of the main spoiler and the auxiliary spoiler to the actuating kinematics enables a structurally simple spoiler with a good aerodynamic effect.

[0009] Furthermore, a guide link can be provided that can be pivoted to the vehicle body and is connected in particular to the first connecting link or to the second connecting link in an articulated manner. This allows a defined pivoting movement of the respective links to be specified when the actuating kinematics are actuated with the aid of the drive link. The actuating kinematics can thus have a main kinematics for displacing the main spoiler relative to the vehicle body, which is designed in particular as a seven-bar linkage.The drive link, the first connecting link, the second connecting link, and the connecting link can be connected to one another in an articulated manner essentially in the manner of a rectangle. A non-parallel movement of the connecting link relative to the drive link, in particular with a pivoting component, can be achieved, in particular, by a different effective length between the articulation points of the respective connecting link and / or a non-parallel arrangement of the connecting links. This allows for a streamlined reception of the spoiler body in the vehicle body in the storage position, and a suitable angle of attack of the spoiler body in the use position.

[0010] In the use position, the auxiliary surface and the main surface are arranged in relation to one another in such a way that the flow caused by airstream is prevented from breaking off at the surface of the spoiler body. An excessively large separation gap between the auxiliary spoiler and the main spoiler and / or an excessively large height offset of the auxiliary surface from the main surface can be avoided. The common plane in which the auxiliary surface and the main surface lie can be a straight or a curved plane, which is in particular continuous, preferably continuously differentiable. For example, the surface of the spoiler body composed of the auxiliary surface and the main surface can have a curved profile lying in this plane in the direction of travel, for example in order to redirect airstream away from the ground in order to increase the contact pressure on the ground.

[0011] The actuating kinematics can move the spoiler body between the storage position, in which the spoiler body is inserted into the upper side of a motor vehicle body, and the use position, in which the spoiler body provides an aerodynamic effect. The main spoiler and the auxiliary spoiler follow different paths during this movement. For example, the main spoiler can be displaced opposite to the direction of travel of the motor vehicle in the use position compared to the storage position, while the auxiliary spoiler can be displaced in the direction of travel of the motor vehicle in the use position compared to the storage position.

[0012] The actuating kinematics can, for example, comprise a linkage with interconnected links, wherein the actuating kinematics is designed, in particular, as a seven-bar linkage with seven spherical bearings. The actuating kinematics can comprise a drive link that can be displaced and / or rotated by a drive unit in order to move the spoiler body between the storage position and the use position and, if necessary, to rotate it. In particular, the actuating kinematics can also be used to move intermediate positions between the storage position and the use position.

[0013] In the stowed position, a portion of the auxiliary surface can be covered by the main spoiler, so that at least a portion of the auxiliary surface is not exposed to airflow in the stowed position. In the use position, at least a portion of the previously covered surface, preferably the entire covered surface, can be exposed and exposed to airflow. In particular, the main spoiler has a larger airflow surface in the use position than the auxiliary spoiler.

[0014] Preferably, an auxiliary drive link and an auxiliary guide link are articulated to the connecting link, wherein an auxiliary connecting link connected to the auxiliary spoiler is articulated to the auxiliary drive link and to the auxiliary guide link. The actuating kinematics can thus have auxiliary kinematics for displacing the auxiliary spoiler relative to the main spoiler, which is designed in particular as a four-bar linkage. With the aid of the auxiliary guide link, the auxiliary connecting link can be pivoted about the articulated connection of the auxiliary guide link to the connecting link, wherein the auxiliary drive link can perform an additional rotation of the auxiliary connecting link about the articulated connection of the auxiliary guide link to the auxiliary connecting link by means of an articulated connection on the auxiliary connecting link that is spaced apart from the articulated connection of the auxiliary guide link to the auxiliary connecting link.This allows the auxiliary spoiler to be moved between a position below the main spoiler in the storage position and the position of the auxiliary spoiler to the side of the main spoiler in the use position, past the main spoiler, using a structurally simple auxiliary kinematics.

[0015] Particularly preferably, the auxiliary drive link is articulated to the first connecting link or to the second connecting link. This allows the auxiliary kinematics to be automatically actuated upon movement of the main kinematics, eliminating the need to provide a separate drive and / or additional guide for the movement of the auxiliary spoiler.

[0016] The articulated connections of the actuating kinematics are implemented, in particular, via a spherical bearing formed with the components to be articulated. The respective articulated connections, in particular the spherical bearings, are preferably different from one another and spaced apart to enable a corresponding pivoting movement.

[0017] In particular, a laterally open receiving pocket for at least partially receiving the auxiliary spoiler is formed between the actuating kinematics and the main spoiler, in particular between a connecting link connected to the main spoiler and a main underside of the main spoiler facing away from the main surface. The connecting link can, in particular, be substantially L-shaped on the side facing the main spoiler in order to provide the receiving pocket between the legs of the imaginary L. This results in a compact and space-saving arrangement of the spoiler in the storage position.

[0018] Preferably, in the use position, the auxiliary surface merges into the main surface in the direction of flow via a separation gap, essentially seamlessly. The separation gap can, in particular, be selected to be sufficiently small to prevent flow separation. Furthermore, it is possible to select the separation gap sufficiently large to prevent the auxiliary spoiler from striking the main spoiler during a relative movement of the auxiliary spoiler to the main spoiler.

[0019] Particularly preferably, the spoiler body in the use position has a greater extension in the direction of travel provided by the main spoiler and the auxiliary spoiler than in the stowed position. The main spoiler and the auxiliary spoiler can be pivoted relative to one another during a movement from the stowed position to the use position along or against the direction of travel, so that the distance over which the airflow flows along the spoiler body can be increased. Preferably, the auxiliary spoiler is positioned in the use position in front of the main spoiler in the direction of travel, like a front spoiler for the main spoiler, so that airflow first hits the auxiliary spoiler and subsequently the main spoiler.

[0020] The invention further relates to a motor vehicle with a motor vehicle body, wherein the motor vehicle body has an air-permeable upper surface facing away from an interior, and a spoiler hinged to the motor vehicle body, which spoiler can be designed and developed as described above, wherein the air-permeable surface of the spoiler body is integrated into the shape of the upper side of the motor vehicle body in the stowed position. The separate and essentially independent coupling of the main spoiler and the auxiliary spoiler to the actuating kinematics enables a structurally simple spoiler with a good aerodynamic effect for the motor vehicle.

[0021] The invention will be explained below by way of example with reference to the accompanying drawings using preferred embodiments, wherein the features presented below can represent an aspect of the invention both individually and in combination. They show: Fig. 1: a schematic side view of a spoiler in a storage position and Fig. 2: a schematic side view of the spoiler from Fig. 1 in a use position.

[0022] The Fig. 1, a spoiler 10 designed as a rear spoiler is recessed into a motor vehicle body 12 of a motor vehicle. The spoiler 10 has a spoiler body 14, which has an upper main spoiler 16 and an auxiliary spoiler 18 pivotable relative to the main spoiler 16. The spoiler body 14 has an outwardly facing airflow surface 20, which in the Fig. 1 is formed exclusively by a main surface 21 of the main spoiler 16, while the auxiliary spoiler 18 is positioned largely below the main spoiler 16. In the storage position, the surface 20 of the spoiler body 14 can be integrated into the shape of an outer side 22 of the motor vehicle body 12 facing outward from a passenger compartment of the motor vehicle.

[0023] The spoiler body 14 is connected to an actuating kinematics 34, with the aid of which the spoiler body 14 is moved from the Fig. 1 shown storage position into the Fig. 2 shown useful position can be moved. The actuating kinematics 34 has a main kinematics 36 designed as a seven-bar linkage for displacing the main spoiler 16 relative to the motor vehicle body 12 and an auxiliary kinematics 38 connected to the main kinematics 36 and designed as a four-bar linkage for displacing the auxiliary spoiler 18 relative to the main spoiler 16. As shown in particular in Fig. As can be seen in Figure 2, the main kinematics 36 has a drive link 40 that can be displaced and / or pivoted by a drive unit and is articulated to a first connecting link 42 and a second connecting link 44. The first connecting link 42 and the second connecting link 44 are in turn articulated to a connecting link 46 connected to the main spoiler 16. The first connecting link 42 is additionally articulated to a guide link 48 that is articulated to the motor vehicle body 12. The auxiliary kinematics 38 is articulated to the connecting link 46. For this purpose, an auxiliary drive link 50 and an auxiliary guide link 52 are articulated to the connecting link 46, wherein the auxiliary drive link 50 and the auxiliary guide link 52 are also articulated to an auxiliary connecting link 54 connected to the auxiliary spoiler 18.

[0024] Between the connecting link 46 and a main underside 55 of the main spoiler 16 pointing away from the main surface 21, a receiving pocket 56 is formed, in which the auxiliary spoiler 18 is accommodated in the Fig. 1 shown storage position can be positioned in a space-saving manner and from which the auxiliary spoiler 18 can be moved into the position shown in Fig.2 can be moved laterally out of the auxiliary kinematics 38 until the auxiliary spoiler 18 is positioned in front of the main spoiler 16 in the direction of travel 60, spaced apart from the main spoiler 16 only by a small separating gap 58. The main surface 21 of the main spoiler 16 and an auxiliary surface 62 of the auxiliary spoiler 18 can thus be positioned in a common plane, so that the surface 20 of the spoiler body 14 against which the airstream flows is composed of both the main surface 21 and the auxiliary surface 62 and is correspondingly larger compared to the storage position.

Claims

[1] Spoiler, in particular rear spoiler, for a motor vehicle, with a spoiler body (14) for deflecting an air flow to provide an aerodynamic effect and a multi-joint actuating kinematics (34) for displacing the spoiler body (14) between a storage position and a use position, wherein the spoiler body (14) has a main spoiler (16) having a main surface (21) and an auxiliary spoiler (18) having an auxiliary surface (62) which is movable relative to the main spoiler (16) by means of the actuating kinematics (34), wherein the auxiliary surface (62) of the auxiliary spoiler (18) is positioned in the storage position outside the main spoiler (16) at least partially in the direction of gravity below the main spoiler (16) and the auxiliary surface (62) of the auxiliary spoiler (18) is positioned in the use position substantially in a common plane with the main surface (21), wherein the auxiliary spoiler (18) can be moved past the main spoiler (16) by the actuating kinematics (34) during a movement between the storage position and the use position outside the main spoiler (16) characterized by , that the actuating kinematics (34) has a drive link (40) that can be displaced and / or pivoted by a drive unit, wherein a first connecting link (42) and a second connecting link (44) are articulatedly connected to the drive link (40), wherein a connecting link (46) connected to the main spoiler (16) is articulatedly connected to the first connecting link (42) and to the second connecting link (44). [2] Spoiler according to claim 1 characterized bythat an auxiliary drive link (50) and an auxiliary guide link (52) are articulated to the connecting link (46), wherein an auxiliary connecting link (54) connected to the auxiliary spoiler (18) is articulated to the auxiliary drive link (50) and to the auxiliary guide link (52). [3] Spoiler according to claim 2 characterized by that the auxiliary drive link (50) is articulated to the first connecting link (42) or to the second connecting link (44). [4] Spoiler according to one of claims 1 to 3 characterized by that between the actuating kinematics (34) and the main spoiler (16), in particular between a connecting link (46) connected to the main spoiler (16) and a main underside (55) of the main spoiler (16) pointing away from the main surface (21), a laterally open receiving pocket (56) for at least partially receiving the auxiliary spoiler (18) is formed. [5] Spoiler according to one of claims 1 to 4 characterized bythat in the use position the auxiliary surface (62) merges into the main surface (21) in the direction of flow via a separating gap (58) essentially without a step. [6] Spoiler according to one of claims 1 to 5 characterized by that the spoiler body (14) in the use position has a greater extension in the direction of travel (60) provided by the main spoiler (16) and the auxiliary spoiler (18) than in the storage position. [7] Motor vehicle with a motor vehicle body (12), wherein the motor vehicle body (12) has an upper side (22) which can be subjected to air flow and points away from an interior space, and a spoiler (10) which is articulated on the motor vehicle body (12) according to one of claims 1 to 6, wherein the surface (20) of the spoiler body (14) which can be subjected to air flow is integrated into the shape of the upper side (22) of the motor vehicle body (12) in the storage position.

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