APPARATUS FOR IMPROVING THE AERODYNAMICS ON A COMMERCIAL VEHICLE

Abstract

The invention exhibits an apparatus for improving the aerodynamics of a commercial vehicle having a cab with doors and below-situated footboards for climbing in and out, and having a front panel in which air inlets are present, wherein the air inlets are connected, via air ducts in or on the panel, to the front wheel case of the commercial vehicle and to an air outlet, wherein the at least one footboard of the cab can be folded away and has at least one through-flow region in the vehicle longitudinal direction.

Claims

1. Apparatus for improving the aerodynamics of a commercial vehicle having a cab with doors and below-situated footboards for climbing in and out, and having a front panel in which air inlets are present, wherein the air inlets are connected, via air ducts in or on the front panel, to the front wheel case of the commercial vehicle and to an air outlet, wherein the at least one footboard of the cab can be folded away and has at least one through-flow region in the vehicle longitudinal direction.

2. Apparatus according to claim 1, wherein the at least one footboard, in the folded-away state, fits into a set-back region of the front panel.

3. Apparatus according to claim 1, wherein the at least one footboard, in the folded-away state, constitutes in terms of its contour a continuation of the outer contour of the vehicle or front panel.

4. Apparatus according to claim 1, wherein the at least one through-flow region extends along the vehicle longitudinal axis.

5. Apparatus according to claim 1, wherein the air inlets are placed in the front panel of the commercial vehicle in the XZ-plane.

Description

DRAWINGS

[0019] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0020] FIG. 1 shows a schematic representation of a commercial vehicle,

[0021] FIG. 2 shows a sectional image through the apparatus according to the invention,

[0022] FIG. 3 shows a view in the front region of the commercial vehicle,

[0023] FIG. 4 shows a detail from the side region of the commercial vehicle,

[0024] FIG. 5 shows a view of the side region of the commercial vehicle with footboards,

[0025] FIG. 6 shows a first embodiment of the pivotable footboards,

[0026] FIG. 7 shows a second embodiment.

DESCRIPTION OF THE INVENTION

[0027] FIG. 1 shows by way of example a commercial vehicle, in this case a tractor unit 1, having a cab 2. The cab has externally visible panels, which are formed, for instance, inter alia, by a bumper 12 and by mudguards 6. By front panel 20 are understood all components of the front and sides of the vehicle which are fitted on the body shell.

[0028] The cab 2 has side doors 4. In order to get into the vehicle, footboards 8 are provided in the front panel 20.

[0029] Embedded in the front panel 20 of the cab 2 are front headlamps 10. In order to attain the flow around the front wheel 13, in the panel 20 are made air inlets 9, into which the incident air infiltrates during running of the vehicle. In FIG. 1 can be seen, by way of example, an air inlet which extends close to the front headlamps 10.

[0030] Such an air inlet 9 would extend symmetrically also on the other side of the vehicle next to the headlamps. The air inlet 9 can have different sizes and, in terms of layout, is optimized to the air flow that is to be obtained.

[0031] In principle, the air inlets 9 should be located in the front region in the X-Z plane in order to use the incident air as efficiently as possible for improving the aerodynamics.

[0032] In FIG. 2 is shown, in a section along the vehicle longitudinal direction Y, how the inflowing air is distributed. Located next to the front headlamp 10, in a part of the panel 20, is an air inlet 9. The panel 20 has an inner structure in the form of an air duct 23 and, in the region of the side door 4, which in this drawing extends out of the plane of the paper, the panel 20 exhibits a region 20A, which is set back in the X-direction. The outer contour 24 has a continuous path without interstices and gaps, so that small turbulences are generated. In this region 20A, the footboards 8 are configured. Via an air outlet 11 located in the region of a wheel case 14, the air flows in the direction of the wheel 13.

[0033] In FIG. 3, the front headlamp 10 in the panel 20 is represented schematically. In this example, the air inlet 9 extends along the entire structural height of the front headlamp.

[0034] In FIG. 4 can be seen, in a view onto the side region of the cab 2, how said sad side region extends beneath the side door 4. This concerns that region 20A of the front panel 20 that is set back inwards from the outer contour 24. In this illustrative embodiment can be seen, in sketch form, two footboards 8, and axles 21 to which these footboards 8 are attached pivotably about the vehicle longitudinal axis y.

[0035] In FIG. 5, the embodiment is represented once again. The footboard 8A applied to the front panel 20 can be seen, as well as, schematically, the view onto the end face of the opened-out footboard 8B. In the folded-away state of the footboard 8A, the structured tread surface 8C of the footboards 8 can be seen.

[0036] In FIGS. 6 and 7, two illustrative embodiments of the pivotable footboards 8 are represented. In the folded-away state 8A, the footboard disappears fully into the set-back region 20 A of the panel 20. By pivoting about the axle 21, the footboard 8 is pivoted perpendicular to the vehicle and to the front panel 20 and can be used as a climb-up aid. The footboard here has either a single or a plurality of through-flow region(s) 22. In the illustrative embodiment of FIG. 6, the footboard 8 is formed by a honeycomb structure or lattice structure. It exhibits a multiplicity of honeycomb cells, which serve as through-flow regions 22.

[0037] By contrast, in the illustrative embodiment of FIG. 7, the through-flow region is the entire inner region of the hollow-made footboard 8.

[0038] In the folded-away state of the footboard 8A, the through-flow regions serve to ensure that the airflow, as indicated in FIG. 2 by the arrows, can flow in a problem-free manner through the footboard.

[0039] Depending on the structural arrangement, a footboard or a plurality of footboards are provided. The footboards 8 have an outer contour, which blends harmoniously into the set-back region 20 A, wherein the outer contour 24 of the vehicle along the panel and the footboards is realized without offsets.

[0040] The through-flow regions 22 extend along the vehicle longitudinal axis Y and the entire structural length of the footboard 8.

REFERENCE SYMBOL LIST

[0041] 1 tractor unit [0042] 2 cab [0043] 3 side door [0044] 6 mudguard [0045] 8 footboard [0046] 8A footboard folded away [0047] 8B footboard opened out [0048] 8C tread surface [0049] 9 air inlet [0050] 0 headlamp [0051] 11 air outlet [0052] 12 bumper [0053] 13 wheel [0054] 14 wheel case [0055] 15 front panel [0056] 21 axle [0057] 22 through-flow region [0058] 23 air-conducting device [0059] 24 outercontour [0060] 20A set-back region