DE19615556A1 - Rear wind spoiler for road and water borne vehicles - Google Patents

Abstract

The spoiler comprises tail wind responsive slats positioned on the vehicle. When in motion, and with a tail wind speed greater than the specified head-on relative wind speed, a proportional energy saving propulsive force is imparted to the vehicle. When the head-on wind is stronger, the spoiler presents only a slight inherent resistance to it. The spoiler has a number of slat panels which can be vertically pivoted and which have horizontally extending pivot points eccentrically offset.

Description

The invention relates to a rear wind bollard for road and water vehicles.

Pneumatically effective spoilers are especially useful for high-speed road vehicles known, but their effectiveness is limited to the pressure of the Vehicle - proportional to the driving speed - on the road surface, or it modulate the oncoming airstream for other purposes.

The invention is therefore based on the object, a spoiler for predominantly to construct slow-moving road / water vehicles in such a way that in Driving the potential tailwind the vehicle a proportional can give energy-saving propulsive force (thrust) without in turn opposite directional wind to offer a significant resistance to the same.

This object is achieved by the features in claim 1.

Advantageous embodiments of the invention are in the claims below featured.

In the rear wind spoiler according to the invention, when driving, there is potential Rear wind if its speed is higher than the prevailing one Driving speed, the vehicle a specifically wind-proportional, energy-saving Driving power conferred.

For this purpose it is the same as the tailwind accessible on road / water vehicles positioned, designed as a laminated blind spoiler, one above the other arranged, vertically swiveling slats when driving with dominant Tail wind closed to each other with the product of a flow-tight layer will.

With a dominant wind resistance (cw), on the other hand, these blind slats, their horizontally running swivel axes to a specifically defined dimension off-center - with respect to the lamella cross-section - almost pivoted backwards into the horizontal position without wind resistance.

This effect is based on the same principle with only one - accordingly larger areas - spoiler lamella possible, but their swivel radius requires a rel. large area to be kept permanently clear, and their weight and area would be for fast and sensitive pneumatic ventilation is unsuitable.

The blind slat (s) and their vertical support flanks on both sides are also aerodynamically contoured so that these elements with a dominant headwind encounter extremely little resistance. In the vertical support flanks there are specifically positioned stop bolts, which are functional Interaction with the cams of the slat axes the defined 90 ° swivel angle grant / limit as such.

The detailed explanation of the structure and function of the illustrated invention is then carried out using the drawings.

It shows Fig. Ventiliermodus of the spoiler of the same 1 ride / tailwind control in multiple laminations,

Fig. 2 testify potential spoiler positioning in road and water driving; Spoiler blade fan mode diagram - selective -

Fig. 3 driving / tailwind control of the spoiler ventilation mode with monolamellations the same.

In FIG. 1, the ride / tailwind control of the spoiler Ventiliermodus is shown the same in multiple lamination.

On the left you can see the spoiler - here laminated 7 times - as it Watercraft could be locked (see screw / rivet holes), in which the the vehicle underneath while driving is receiving tailwind, it but a higher speed, at which then of course the Head wind predominates (see head wind <tail wind).

Since the slat pivot axis "a" each to a specifically defined dimension off-center - with respect to the lamella cross-section - in the direction of the one on the left here long front is slightly offset, all of them pivot independently pivoting spoiler slats almost in these wind conditions without wind resistance (due to the "minor" axis offset) in the precise horizontal position shown here, these spoiler blind slats are exactly at 90 ° swivel angle through the respective axis cams "a" to the specific ones positioned stop pin "b" limited in their swivel range. This Stop bolts and cams should be as low as possible Wind resistance should only be positioned on a vertical spoiler flank if possible. Now the road / watercraft drives slower than that again Tail wind speed (see headwind <tailwind), or has the same compared to the driving speed increased by several km / h or knots the vehicle now has a specific propulsive force or a thrust, which the Tail wind strength is proportional, because even at congruent driving speed in Relation to tail wind speed through the aforementioned specific Rotary axis offset the heavier rear slat segments thereby Rotate / swivel the mutually sealing slats to the vertical position and thus the rear wind attack area automatically according to the right spoiler display produce. The respective axle cams "a" hit the same for this specifically positioned stop pin "c" and thus prevent axial Keep turning. The aerodynamic, inexpensive, cross-sectional shape of both these blind slats and their Vertical support flanks.

This is necessary so that the wind resistance (cw) of these spoiler elements horizontally twisted / set slats only to a rel. acceptable, but not adding an unacceptable sum.  

In Fig. 2, the potential spoiler positioning in road and water vehicles, as well as the scheme of the spoiler blade ventilation mode is selectively shown. On the left side, this Venetian blind spoiler, as it could be locked on the car body superstructures, for example, is visible. According to this illustration, the blind slats are pivoted into the vertical locking position due to the always desirable rear wind dominance, and the vehicle now receives the wind-proportional, energy-saving propulsion. Decisive for this rear wind propulsion force is of course the area dimension of the blind slats, which z. B. when used in geographically near sea / sea or mountainous landscapes, the ratio shown here: vehicle / spoiler should at least take into account, in order to be able to use the ubiquitous wind energy in the rear in a rationally energy-saving manner (especially with slow-moving electric vehicles).

On the top right is this rear wind energy spoiler, like the one on watercraft - like here e.g. B. on a sea yacht - could be positioned accessible to the tail wind, being for the same time embodies a "ventilation sail", shown as an example.

According to this representation, the lamellae, which are also the vertical support flanks (Spoiler frame) made of light, elastic, but also break-resistant Plastics or carbon fiber materials should be made, also by the "aft" dominant wind swung into the vertical closed position. Thereby will of course also be a wind / spoiler surface proportional energy savings.

This "ventilation sail" blocks in this pneumatic flow - in the direction of travel - not even significantly the backward linear gaze area, since below the lowest slat up to the ship's floor planks a specific Rear view field recess is provided, which for the already flat "lake views" certainly enough. Below this illustration is the diagram of the spoiler slat Ventilation mode again selectively, with regard to the specific Flow direction control shown.

On the basis of the schematic "A" the swivel movement and the definitive position shown a louvre slat, which almost the same with dominant wind takes up no wind resistance. The square recess represents the possible one Driver hole out (milling), in which the Slat swivel axis segments with the same square cross-section non-rotatably are anchored (e.g. glued in, pressed in, etc.) so that the one-sided, Axis cams "a" that limit the angle of rotation can each function. The implied Marking to the right of this points to the real cross-sectional center of the Slat, which makes the specific swivel axis offset plausible.

The horizontal arrow segments illustrate the oncoming one Airstream flow, which this aerodynamically most aerodynamically favorable contour (s) of this Spoiler lamella (s) are unlikely to significantly counteract turbulence that acts as a brake. On the right next to it you can finally see the schematic "B", which the Panning movement and definitive position of the blind slats represents the same with dominant flow speed in the rear automatically due to the take specific swivel axis offset.  

The radial arrow segments point to the axial locking pivot movement, the horizontal, on the other hand, to the rear-engaging, energy-saving Direction of flow of the rear wind.

However, there must be an extremely small gap between the Slat segments (approx. 2-3 mm) should be present so that there are none Swivel blocking can come from potential clamping points.  

In FIG. 3, the drive-control tailwind is the spoiler shown Ventiliermodus thereof at Monolamellierung.

There is only one between the two vertical support flanks of the spoiler Slat, which, however, congruent with the area of the sum of the effective becoming slat surfaces of the aforementioned version.

The advantage of this monolamination, whose pneumatic swivel / control mode in The principle of the aforementioned version is the same, probably based mainly on the robust construction and the completely dense, rear wind attack surface. The specifically - as with multiple lamination - offset pivot axis "a" lies here however at the upper end of the spoiler support flanks on both sides.

The stop bolts of the vertical support flanks are designated by "b" / "c" which the potentially axial swivel range is also limited to 90 °, and "a" homogeneously designates the stop cam which strikes it radially. With stronger Execution of a vertical spoiler support flank and the axis of rotation or their bearing would only be one of these projecting slightly beyond the pivot axis Support flanks, which have the stop elements, can potentially be constructed. Also applies the construction and positioning of the stop elements shown here is not imperative, but only exemplary.

Claims (4)

1. Rear wind spoiler for road and water vehicles, characterized in that a Venetian blind spoiler positioned on the back of wind / water vehicles, gives a proportional, energy-saving propulsive force to the vehicle when driving at a higher rear wind speed compared to the driving speed-specific headwind resistance (cw), in turn with a stronger headwind itself offers only slight own wind resistance. 2. Rear wind spoiler for road and water vehicles Claim 1 characterized, that the driving / tailwind specific effect according to claim 1 through a large number of stacked vertically swiveling blind slats is realized horizontally running swivel axes to a specific defined dimension off-center - with regard to the slat cross-section - are offset, which means that they dominate in the dominant wind almost automatically without resistance - in horizontal position swinging - open, but with a prevailing tail wind be swiveled immediately into the vertical position and thereby the propulsive force to each other Guarantee claim 1. 3. Rear wind spoiler for road and water vehicles Claims 1 and 2, characterized, that both the blind slats and their mutual Vertical support flanks according to their cross section are aerodynamically contoured so that these elements dominating headwind the same extremely low To oppose resistance. 4. Rear wind spoiler for road and water vehicles Claims 1 and 2, characterized,  that this pneumatic ventilation in relation to driving / Tail wind also from a single, accordingly Larger slats according to the same principle (however reaction carriers) can be controlled.