DE202011005504U1 - Vehicle with air guiding device - Google Patents

Abstract

Vehicle (5) with an air guiding device (1), the vehicle (5) comprising a body-fixed base on an underside side area between a front wheel and a rear wheel, characterized in that the air guiding device (1) is attached to the body-fixed base, and the The air guiding device (1) comprises a guiding element (2) which extends in the longitudinal direction of the vehicle and which can be adjusted between a retracted rest position and an extended operating position by means of an actuating mechanism (6).

Description

The invention relates to a vehicle with an air guiding device according to the preamble of claim 1.

So far vehicles are provided in the lower side area only with a permanently installed vehicle rocker, which is designed according to aerodynamic and optical aspects and legal requirements.

Due to the specifications that are incorporated into the design of the vehicle rocker, compromises must be made from an aerodynamic point of view. In particular, the ground clearance is considered in the design of the vehicle sill. However, these standard ground clearance values are taken into account, above all, for low speeds, which results in a non-optimal aerodynamic air flow under the vehicle for higher speeds.

In particular, influencing the flow conditions below the vehicle has significant effects on the flow around the entire vehicle and thus on the flow coefficient. Furthermore, the underbody flow has a considerable influence on the road grip of the vehicle.

As described above, the design of the vehicle rocker takes priority with respect to low speed. Reasons for this are, for example, different areas of the vehicle at low and high speeds. Thus, a vehicle will travel at low speeds, especially during parking, near curbs or other elevations, whereas when operating at higher speeds, such obstacles are unlikely to be anticipated.

In this respect, the specifications that are observed in the design of the vehicle rocker due to operation at low speeds, at theoretical higher speeds should not be considered to this extent. In other words, this means that the design of the vehicle's rocker can differ from the design of the vehicle rocker at low speeds when operating the vehicle at higher speeds in order to ensure optimal aerodynamic flow around the vehicle in both speed ranges.

The invention is therefore based on the object to provide a vehicle with an air guiding device, which allows both in low speed ranges and in high speed ranges optimal aerodynamic flow around the vehicle sub-area and thus the entire vehicle.

This object is achieved by the vehicle with spoiler with the features of claim 1.

According to the invention, therefore, a vehicle with an air guiding device is proposed, wherein the vehicle comprises a body-mounted base on a lower side region between a front wheel and a rear wheel and the air guiding device is fastened to the body-mounted base, and the air guiding device comprises a guide element extending in the vehicle longitudinal direction, which by means of an actuating mechanism between a retracted rest position and a flared operating position is adjustable.

The essence of the invention therefore consists in that the air guiding device can be adapted to different driving situations on the underside side region of a vehicle as a result of an adjustment of the guide element between a rest position and an issued operating position. Thus, the rest position can be assumed, for example, at low speeds, and the issued operating position can be assumed, for example, at higher speeds.

Thus, at low speeds, it becomes possible to meet the ground clearance requirements of the underside side of the vehicle by assuming the retracted home position and, secondly, to optimize the aerodynamic flow below the vehicle at higher speeds by assuming the deployed operating position.

Particularly at higher speeds, the flow coefficient of the vehicle, which is also significantly influenced by the underbody flow of the vehicle, is very significant. Therefore, it is of particular advantage, at higher speeds by changing the spoiler in the lower side region of the vehicle to influence the flow coefficient of the vehicle accordingly positive. This is done by the issued operating position of the spoiler. In addition, influencing the underbody flow can influence the vehicle's traction.

The exhibited operating position, for example, can be reasonably assumed at about 140 km / h, because from this speed range, a non-optimal vehicle underbody flow has a particularly negative effect on the flow coefficient of the vehicle. The actuation of the Air guiding device and adjustment in the issued operating position can be done automatically at about the said speed value of 140 km / h, or can be activated manually by the driver.

Also, especially at these higher speed ranges, in which the issued operating position is assumed to be less obstacles to expect, which would require a high ground clearance.

Thus, the vehicle is at low speeds, such as parking, in the vicinity of curbs, which require a high ground clearance, whereas in a highway ride is not expected to be such obstacles.

Thus, if the guide element of the spoiler is in flared operating position, so that the guide has a small distance from the road and thus largely shields the underbody area under the vehicle against further influx of air from the outside under the vehicle. As a result, the desired negative pressure under the vehicle can develop better than the conventional distance of the vehicle rocker to the level of the road.

In other words, therefore, the guide element of the air guiding device located in the deployed operating position reduces the distance between the vehicle rocker and the level of the roadway. Another advantage of this measure is an improvement in the traction of the vehicle.

In an advantageous embodiment of the vehicle with air guiding device, the adjustment between the retracted rest position of the guide element and the issued operating position of the guide element is effected by parallel displacement and / or angular displacement of the guide element. This allows a particularly flexible adjustment of the guide element.

Also, this allows a stepless control of the resistance, which the guide element opposes to the air flow. Depending on the set angle or depending on the extent of the parallel shift, the resistance continuously increases or decreases more smoothly.

In parallel displacement - ie linear movement - of the guide element, for example, the guide element could be guided out of a gap in the vehicle sill and moved out as needed in the issued operating position. Under certain circumstances, it may be necessary to seal a gap or transition between the vehicle sill and the guide element with a sealing element. Otherwise, the flow conditions could be disturbed at this point and cause a worse flow coefficient.

According to a further advantageous embodiment, the guide element comprises a joint which can be fastened to the vehicle and whose pivot axis extends in the vehicle longitudinal direction. As a result, a structurally simple realization of an angular adjustment of the guide element is possible.

In this variant, the guide element is fastened indirectly via the pivot axis on the vehicle, particularly advantageously on the vehicle sill. As a result, the guide element is mounted pivotably about the axis on the vehicle or on the vehicle sill as a result. The pivot axis is expediently arranged in the vehicle longitudinal direction.

According to a further advantageous embodiment, the guide element can be adjusted by rotation about the pivot axis between the retracted rest position and the issued operating position.

In particular, in the arrangement of the pivot axis in the vehicle longitudinal direction so that the retracted rest position of the guide element can be adjusted so that the guide element lies flat in this position on the underbody or on the sill of the vehicle.

By rotation about the pivot axis, the guide element can then be moved from the retracted rest position to the issued operating position. In particular, in the arrangement of the pivot axis in the vehicle longitudinal direction, the guide element is thereby brought from the position lying flat on the underbody in a vertically downwardly projecting position, which corresponds to the issued operating position.

By this from the underbody or sills of the vehicle downwardly projecting position of the guide element of the distance to the roadway is reduced.

The transfer of the guide element from the retracted rest position in the issued operating position is particularly advantageous in the speed range of about 140 km / h.

According to a further advantageous embodiment, the actuating mechanism comprises a crank mechanism. By this crank mechanism, the guide element, which is fastened via the pivot axis in the vehicle longitudinal direction, are particularly easy to operate.

According to a further advantageous embodiment, the actuating mechanism comprises a spindle drive. By the spindle drive any number and selectable flexible intermediate positions are possible. The spindles can also replace individual or all handlebars of a multi-joint mechanism.

According to a further advantageous embodiment, the actuating mechanism comprises a link drive. As a result, the number and position of the intermediate positions can be determined structurally.

According to a further advantageous embodiment, the actuating mechanism comprises a multi-joint mechanism. This makes it possible to constructively realize a movement of the guide element in all dimensions.

Further advantages and advantageous embodiments of the subject invention are the description, the drawings and claims removed.

An embodiment of a vehicle according to the invention formed with air guiding device is shown schematically simplified in the drawing and will be explained in more detail in the following description. It shows:

1 a vehicle with an air guiding device and a guide element in flared operating position in a schematic side view;

2 a section through a sill area of a vehicle with air guiding device and a guide element in the retracted rest position; and

3 a 2 corresponding view, but with a guide element in flared operating position.

1 shows a vehicle 5 with air guiding device 1 and a guide element 2 in flared operating position in a schematic side view. The guiding element 2 Here is designed as a hinged strip, which between front wheel 10 and rear wheel 11 is arranged.

2 shows a vehicle in a lower side area with a spoiler 1 and a guide element 2 that's about a pivot axis 3 with a sill 4 of a vehicle 5 connected is. Furthermore, the guide element 2 over a crank loop 6 and a lever hinged on its inside 9 driven. The lever 9 is rotatably on the outside with the guide element 2 connected. The guiding element 2 is designed here as a strip sheet.

In the in 2 shown position is the guide element 2 in retracted rest position. This retracted rest position is characterized in that the guide element 2 flat under the vehicle floor. The distance between the vehicle sills 4 and the roadway 7 corresponds here to the distance known from the prior art and allows an unimpeded inflow of air in the direction of the arrow 8th from outside under the vehicle.

3 shows the guide element 2 in flared operating position. The crank loop 6 has this in accordance with the retracted rest position 2 located guide element 2 moved to the issued operating position.

In the issued operating position forms the guide element 2 a vertical extension down towards the roadway 7 , In other words, so will the sill 4 through the guide element 2 extended in the issued operating position down towards the road and thus the distance to the road 7 reduced.

By this additional foreclosure of the vehicle underbody space through the guide 2 in the issued operating position the in 2 illustrated air flow 8th inhibited and inhibited the influx of air under the vehicle.

LIST OF REFERENCE NUMBERS

1

spoiler device

2

vane

3

swivel axis

4

sill

5

vehicle

6

A crank slide

7

roadway

8th

air flow direction

9

lever

10

front

11

rear wheel

Claims (8)

Vehicle ( 5 ) with an air guiding device ( 1 ), where the vehicle ( 5 ) comprises on a lower side region between a front wheel and a rear wheel a body-fixed base, characterized in that the air guiding device ( 1 ) is attached to the body-mounted base, and the air guiding device ( 1 ) extending in the vehicle longitudinal direction guide element ( 2 ), which by means of an actuating mechanism ( 6 ) is adjustable between a retracted rest position and a flared operating position. Vehicle ( 5 ) according to claim 1, characterized in that the adjustment between the retracted rest position of the guide element ( 2 ) and the issued operating position of the guide element ( 2 ) by parallel displacement and / or angular displacement of the guide element ( 2 ) he follows. Vehicle ( 5 ) according to claim 1 or 2, characterized in that the guide element ( 2 ) a joint ( 3 ), which on the vehicle ( 5 ) is fastened and the pivot axis extends in the vehicle longitudinal direction. Vehicle ( 5 ) according to claim 3, characterized in that the guide element ( 2 ) by rotation about the pivot axis ( 3 ) can be adjusted between the retracted rest position and the issued operating position. Vehicle ( 5 ) according to one of claims 1 to 4, characterized in that the actuating mechanism comprises a crank mechanism. Vehicle ( 5 ) according to one of claims 1 to 4, characterized in that the actuating mechanism comprises a spindle drive. Vehicle ( 5 ) according to one of claims 1 to 4, characterized in that the actuating mechanism comprises a sliding drive. Vehicle ( 5 ) according to one of claims 1 to 4, characterized in that the actuating mechanism comprises a multi-joint mechanism.

Images