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1. (US5678884) Air guide device with air intake openings
Nota: Texto obtenido mediante procedimiento automático de reconocimiento óptico de caracteres.
Solo tiene valor jurídico la versión en formato PDF
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to an air guide device and, more particularly, to an air guide device on the rear of a motor vehicle with an airfoil located between sides thereof.
German Patent document DE-41 02 559 A1 describes an airfoil arrangement for improving the ground adhesion of a motor vehicle. The airfoil is mounted transversely on the top of the rear of the vehicle and is operated upon by the wind blast in such manner that a downward force is produced. The airfoil has an outwardly convex surface facing the rear of the vehicle. In addition, U.S. Pat. No. 4,558,898 teaches an airfoil with sides. The airfoil is supported between supports on a trunk lid of a motor vehicle.
There is therefore needed an improved air guide device for a motor vehicle which, in addition to a downward force, ensures optimum air guidance to the engine as well as a simple installation.
These needs are met according to the invention by an air guide device on the rear of a motor vehicle with an airfoil located between sides thereof. The device includes a spoiler unit located at a distance from the airfoil with an integrated air intake grille in a trunk lid. The spoiler unit is made in one piece with sides to hold the airfoil. Intake openings are provided in each of the sides to admit air to the engine.
The primary advantages achieved with the present invention consist in that the air guide device is removably integrated assemblywise into a trunk lid, resulting in a preassembled module composed of the hood and air guide device. The air guide device is formed by an airfoil arranged transversely with respect to the vehicle as well as a spoiler which, together with sides, forms a one-piece module and is fitted into an opening in the trunk lid and fastened in place by screw fasteners. At the same time, air inlet openings in an intake grille are located in the basic body of the spoiler.
In preferred embodiments, the sides of the air guide device constitute air guide elements and each have intake openings on the inside that allow accumulated air to be fed to the engine. For this purpose, the sides are located approximately at the centers of the fenders and with a lateral spacing from the vehicle body above the belt line so that even the air stream flowing past the vehicle on the sides will be guided by the air guide device.
In further preferred embodiments, between the sides of the air guide, the airfoil assumes a basic position and a position in which it is at an angle. This is so that different downward forces can be generated. In particular, a downward force is produced even when the vehicle is traveling slowly.
In order for the air guide device, especially by virtue of the airfoil in conjunction with the spoiler, to produce an optimum air guidance with correspondingly acting downward force of the wind even at low speeds, the airfoil is made in the form of a supporting surface profile as in an aircraft. When viewed from above, the airfoil is made in the form of a section of a circle. In addition, the airfoil, as viewed from above, is made arcuate.
In certain preferred embodiments, the sides, as seen in the side view, are approximately wedge-shaped like the point of an arrow and have a plurality of sections that together produce an irregular pentagon.
The intake openings in each side are made either funnel-shaped with an elongated mouth opening or triangular in shape, with this triangular mouth opening being made directly without a funnel-shaped intake channel.
Other objects, advantages and novel features of the present invention will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 as a rear view of the air guide device according to the invention;
FIG. 2 is a perspective view of the air guide device;
FIG. 3 is a top view of the air guide device;
FIG. 4 is a side view of one side of the air guide device;
FIG. 5 is a top view of an air intake opening on the side of the air guide device;
FIG. 6 is a central section view through the air guide device with the airfoil, spoiler, and air intake grille;
FIG. 7 is a side view of the airfoil in a basic position and in an adjusted position as indicated by the dashed lines;
FIG. 8 is a schematic diagram of the airfoil with supporting surface profile; and
FIG. 9 is another embodiment of an air intake opening in the side of the air guide device.
DETAILED DESCRIPTION OF THE DRAWINGS
Referring to FIG. 1, an air guide device 1 essentially includes a spoiler unit 3 inserted in a trunk lid 2 with integrated sides 4, 5 and a ventilation grille 6. The spoiler unit 3 consists of a spoiler 7 with an elevated end edge 8 (FIG. 6) and molded sides 4 and 5. Above the spoiler 7 at a vertical distance therefrom, an airfoil 9 is mounted between the sides 4, 5 and is in the shape of a supporting surface profile (FIG. 8) as in an aircraft. The direction of travel of the vehicle is indicated by arrow F in the figures.
The airfoil 9 has its highly positively convex surface 20 (FIG. 6) facing the spoiler 7 and is attached by screws 11 (FIG. 2) to side elements 4, 5. The airfoil 9 can be locked on the side elements 4, 5 in at least two positions, a basic position I and an adjusted position II (FIG. 7). The adjusted position II is inclined relative to the basic position by an angle alpha=10°. The airfoil 9, as viewed from above, forms a section of a circle K as indicated by the dot-dashed lines in FIG. 3. Viewed from the front, the airfoil 9 is arcuate with a slight upward curvature. The airfoil 9 runs approximately parallel to the spoiler 7. The spoiler 7 extends up to the centers of the vehicle fenders so that a space "a" is left between the sides 12 of the vehicle above a belt line GL and the side elements 4, 5 as shown in FIG. 1. Above the fenders, the spoiler 7 has an exposed section "A".
An air intake channel 13, 13a having an intake opening 14, 14a is provided in each of the side elements 4, 5. The air inlet channel 13 according to FIG. 5 has a funnel shape provided in an ear-shaped molding on the side elements 4, 5. According to another embodiment shown in FIG. 9, the intake opening 14a is formed at an end on the elements 4, 5. The intake opening 14a ends approximately at the leading edge 15 of the trunk lid 2.
The side elements 4 and 5, as seen in the side view of FIG. 4, are approximately wedge-shaped having a plurality of sections b to f which together produce an irregular pentagonal element. Sections c and f run approximately parallel to one another. Section c is located at an approximately right angle with respect to section d.
As FIG. 6 shows in greater detail, the positive surface 20 of the airfoil 9 rotated through 180° corresponds approximately in shape to the negative surface 21 of the spoiler 7, so that surfaces 21 and 22 are approximately parallel to one another. The spoiler 7 has a negative surface 21 that ends in front of the free end 22 of the airfoil 9.
Although the invention has been described and illustrated in detail, it is to be clearly understood that the same is by way of illustration and example, and is not to be taken by way of limitation. The spirit and scope of the present invention are to be limited only by the terms of the appended claims.