Patent Application
20070243818
The present invention relates to the field of air management in a vehicular front end. More specifically, the present invention relates to an air guide for front end cooling.
A motor vehicle, such as an automobile, truck, and the like, typically has an engine compartment located at the front of the vehicle. In general, an internal front end support structure bridges the front of the engine compartment and supports a radiator that is part of the engine's cooling system. When the vehicle is equipped with air conditioning, a condenser mounts in front of the radiator. The condenser and radiator are cooled by air that passes through them. The air may be forced through the condenser and radiator by ram air effect when the vehicle is in forward motion, and/or by being drawn through the condenser and radiator by a cooling fan typically located directly behind the radiator.
In some vehicles the front end support structure is known as a front-end carrier, and is one component of a front end module. The front end module integrates the front-end carrier and several components, including the radiator, air conditioning condenser, electric fan, motor, and air duct into one unit. The functions of the various components are integrated in a front end module to create better performance, and to enhance installation efficiency during vehicle assembly.
The duct, also known as an air guide, is typically integrated with and positioned in front of the front-end carrier. The air guide functions to introduce outside air into the condenser and radiator, while limiting recirculation of hot air from the engine compartment. The vehicle fascia and bumper are located in front of the air guide so that the air guide interfaces with the vehicle fascia and bumper. The vehicle fascia is an aesthetically pleasing component, while offering advantages of stylization freedom, impact resistance, less expense to replace than their metal equivalents, and so forth. The majority of modern plastic car bumper system fascias are made of thermoplastic olefins (TPOs), polycarbonates, polyesters, polypropylene, polyurethanes, polyamides, or blends of these with, for instance, glass fibers for strength and structural rigidity.
A typical air guide is relatively stiff, and some design requirements call for a-gap between the air guide and vehicle fascia. This gap is required so that the relatively stiff air guide does not come into contact with the vehicle fascia which can make vehicle fascia assembly difficult and which can potentially damage the vehicle fascia and/or the air guide during assembly. Unfortunately, this gap allows warm air to recirculate, thus reducing performance of the heating, ventilation, and air conditioning (HVAC) system of the vehicle.
In some instances, a material such as, thermoplastic elastomer, thermoplastic vulcanizate, and other rubber or foam materials, is attached to the edge of the air guide to provide a soft contact to the vehicle fascia. This material also serves to close or fill the aforementioned gap. Unfortunately, addition of a material onto the air guide increases the cost of the air guide in terms of both materials and labor. Moreover, this material may eventually disintegrate or become disengaged from the air guide so that the gap once again becomes problematic in terms of reducing performance of the HVAC system.
Yet another problem with some prior art air guides is that compression of the air guide by the vehicle fascia during assembly can cause the air guide to twist inboard thus reducing the open surface area in front of the condenser/radiator. Of course, any blockage restricts the amount of air that is able to flow through the condenser/radiator thereby further reducing HVAC system performance.
Accordingly, it is an advantage of the present invention that an air guide for a vehicle is provided.
It is another advantage of the present invention that an air guide is provided that produces a tight seal between a front end support structure and a vehicle component.
Another advantage of the present invention is that an air guide is provided that is resistant to twisting during compression.
Yet another advantage of the present invention is that an air guide is provided that is cost effectively produced and installed onto a front end support structure of a vehicle.
The above and other advantages of the present invention are carried out in one form by an air guide system for a vehicle. The air guide system includes a body attachable to a front end structure of the vehicle, and a serpentine compression section having a first end coupled to the body and a second end displaced from the body.
The above and other advantages of the present invention are carried out in another form by an air guide system for a vehicle. The air guide system includes a body attachable to a front end structure of the vehicle, the body exhibiting a first thickness. The air guide system further includes a serpentine compression section having a first curved portion and a second curved portion. The first curved portion has a first end coupled to the body. The second curved portion is spaced from the first curved portion in a radial direction and has a second end displaced from the body. The serpentine compression section exhibits a second thickness, the second thickness being less than the first thickness.
A more complete understanding of the present invention may be derived by referring to the detailed description and claims when considered in connection with the Figures, wherein like reference numbers refer to similar items throughout the Figures, and:
Front end module 22 includes a front end structure typically known as a front-end carrier 28, a cooling module 30 assembled to a rearward facing side 31 of front-end carrier 28, and an air guide system 32 assembled to and projecting from a frontward facing side 33 of front-end carrier 28. Cooling module 30 includes a radiator, and may optionally include an air conditioning condenser. Front end module 22 can include additional components, not illustrated herein for simplicity, such as an electric fan, motor, and the like known to those skilled in the art.
Air guide system 32 includes a first air guide 34 and a second air guide 36 formed as mirror image of first air guide 34. First and second air guides 34 and 36, respectively, are shaped to accommodate placement of front bumper 24. Each of air guides 32 couples to a periphery 38 about central openings 39 of front-end carrier 28 and projects toward vehicle fascia 26 to form a seal between front-end carrier 28 and vehicle fascia 26. Air is guided by air guide system 32 through central openings 39 of front-end carrier 28 and is forced through cooling module 30 by ram air effect when the vehicle is in forward motion, and/or by being drawn through cooling module 30 by a cooling fan (not shown) typically located directly behind cooling module 30.
Referring to
First air guide 34 includes a body 40 having clips 42 attachable of periphery 38 (
In a preferred embodiment, serpentine compression section 44 is an S-shaped member that includes a first curved portion 50 having first edge 46 and a second curved portion 52 having second edge 48. More descriptively, first curved portion 50 exhibits a first concave surface 54. Second curved portion 52 exhibits a second concave surface 56 arranged in opposing relation (i.e., facing) first concave surface and spaced from first curved portion 50 in a radial direction 58.
The term “serpentine” used in connection with compression section 44 signifies the wave-like or zigzag profile of compression section 44. The serpentine shape of compression section 44 enables compression section 44 to collapse behind vehicle fascia 26 (
Although the S-shaped profile of serpentine compression section 44 only includes two curved portions, i.e., first curved portion 50 and second curved portion 52, it should be understood that in an alternative embodiment, serpentine compression section 44 may include more than two contiguous curved portions, or may include a zigzag pattern of multiple reversing acute angles.
First curved portion 50 includes a third edge 60, and second curved portion 52 includes a fourth edge 62. First and third edges 46 and 60, respectively, of first curved portion 50 are generally aligned with second and fourth edges 48 and 62, respectively, of second curved portion 52 and a transverse dimension 63 of body 40 to facilitate the non-twisting compression attribute of serpentine compression section 44.
First curved portion 50 of serpentine compression section 44 exhibits a first depth 64 and a first width 66. Similarly, second curved portion 52 of serpentine compression section 44 exhibits a second depth 68 and a second width 70. In this exemplary embodiment, first depth 64 is substantially equivalent to first width 66, and second depth 68 is substantially equivalent to second width 70. Moreover, second depth 68 is greater than first depth 64 (approximately twice as deep) and second width 70 is greater than first width 66 (again approximately twice as wide). These dimensions enhance the compressibility of serpentine compression section 44 without expanding wide enough during its collapse to block central openings 39 (
Body 40 exhibits a first thickness 72, and serpentine compression section 44 exhibits a second thickness 74 that is less than first thickness 72. For example, first thickness 72 may be one and a half millimeters, and second thickness 74 may be only one millimeter. This reduction of material thickness between body 40 and serpentine compression section 44 advantageously enables significant collapse of serpentine compression section 44 when assembling vehicle fascia 26 (
First air guide 34 may further optionally include relief cuts 76 to soften first air guide 34 locally. When there is interference with vehicle fascia 26, the ready collapse and soft contact of serpentine compression section 44 eliminates the need for a gap between the air guide and vehicle fascia. Moreover, a seal is created without the need for the attachment of additional material to the edge of first air guide 34 to provide a soft contact to the vehicle fascia. Consequently, the single piece construction, decreases materials and labor costs for assembly.
In summary, the present invention teaches of an air guide for a vehicle. The air guide includes a serpentine compression section that readily collapses when there is an interference with a vehicle component, such as the vehicle fascia, to produce a tight seal between a vehicular front end support structure and the vehicle component. Moreover, the wave-like or zigzag cross-sectional shape of serpentine compression section and the thinner profile of compression section relative to the body cause the compression section to readily collapse with very little twist. The one-piece construction of the air guide can be cost effectively produced and installed onto a front-end carrier of a vehicle.
Although the preferred embodiments of the invention have been illustrated and described in detail, it will be readily apparent to those skilled in the art that various modifications may be made therein without departing from the spirit of the invention or from the scope of the appended claims.
