Patent Application
20080231082
1. Field of the Invention
The subject invention relates to a vehicle including a wheel housing liner, and more specifically, to a vehicle including a wheel housing liner for absorbing sound and vibrations.
2. Description of the Prior Art
Vehicles generally include at least one wheel housing defining a wheel well. A wheel is disposed in the wheel well, and typically, a liner is also disposed in the wheel well to prevent moisture and debris from entering the vehicle. The liner is generally spaced from the wheel. Most conventional liners are injection molded of a polymeric material and include at least one fastener disposed on the liner for securing the liner to the vehicle. An example of such a wheel well liner for a vehicle is disclosed in U.S. Pat. No. 6,155,624 to Bienenstein.
It is necessary that such prior art polymeric wheel housing liners be sufficiently rigid to maintain structural integrity and to withstand the impact of debris propelled by the wheel of the vehicle. It is also desirable that such liners absorb sound generated by the wheel and forces generated by debris propelled by the wheel. To provide sufficient rigidity, the prior art wheel housing liners comprise sufficiently dense, or high density, polymers. While such liners are able to maintain their form and are able to withstand the impact of debris propelled by the wheel of the vehicle, such liners are less sound and impact absorptive because of the denser materials.
Accordingly, there is always a need to improve a polymeric wheel housing liner in sound absorption and impact absorption properties.
In addition to the structure described above, the present invention includes a rubber dispersed in the polymer for absorbing sound generated by the wheel and for absorbing forces generated by debris propelled by the wheel.
Accordingly, the tensile properties of rubber improve the sound absorption and impact absorption properties of the liner and the overall sound absorption and impact absorption effectiveness of the liner is improved.
Other advantages of the present invention will be readily appreciated, as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein:
Referring to the Figures, wherein like numerals indicate corresponding parts throughout the several views, a vehicle 20 is generally shown in
The vehicle 20 comprises at least one wheel housing 22 defining a wheel well 24 and includes a wheel 26 disposed in the wheel well 24. In an embodiment of the vehicle 20, as shown in
A liner 32 is generally shown in
The liner 32 is generally comprised of a polymer. Polymers such as polypropylene or high-density polyethylene may be used, however, those skilled in the art appreciate other polymers may also be used. The liner 32 is preferably injection molded and defines closed cells impermeable to water. A closed cell structure improves flexibility of the liner 32.
At least one fastener 38 is disposed on the liner 32 for securing the liner 32 to the vehicle 20. The fastener 38 can be molded on the liner 32 or snapped on the liner 32 to secure the liner 32 to the vehicle 20.
In an embodiment of the invention, the liner 32 includes a reinforcing material dispersed in the polymer. The reinforcing material is more rigid than the polymer for increasing the tensile strength of the liner 32. The reinforcing material is preferably either a mineral or fiber, or a combination thereof. Minerals suitable for such a purpose include, but are not limited to, Talc and CaCO3. Fibers suitable for such a purpose include, but are not limited to, glass, polymer fiber, aramid fiber, and carbon fiber.
In an embodiment of the invention, the liner 32 includes a flame retardant dispersed in the polymer for inhibiting flammability of the liner 32.
In an embodiment of the invention, the liner 32 includes an adhesion promoter for adhering the polymer to dispersions therein. An adhesion promoter such as MOH, or any other adhesion or compatibleness promoter commonly known in the art, is suitable for such a purpose.
In an embodiment of the invention, a foaming agent is added to the liner 32 to create a plurality of pockets throughout the liner 32. Chemical foaming agents being exothermic or endothermic or physical blowing agents such as nitrogen or carbon dioxide are suitable for such a purpose.
The process of producing the liner 32 may produce an unpleasant odor. To eliminate or reduce such an odor, a functionalized olefin modifier can be added to the liner 32 for scenting the liner 32. In additional embodiments, a fragrance concentrate or a fragrance oil can be added to the liner 32 in addition to, or in lieu of, the functionalized olefin modifier for scenting the liner 32.
The liner 32 in the vehicle 20 is characterized by the liner 32 including a rubber dispersed in the polymer for absorbing sound generated by the wheel 26 and for absorbing forces generated by debris propelled by the wheel 26. The rubber generally consists of a plurality of rubber particulates 40 preferably having a mesh size in the range of 1 to 200 mesh. Cryogenically ground tire rubber is suitable for such a purpose.
The liner 32 is further characterized by including at least one rib 42 for deflecting debris propelled by the wheel 26 away from the fender 28 and the vehicle 20. The rib 42 preferably extends longitudinally along the liner 32 between the longitudinal inner and outer side edges 36 and in an arcuate path about and spaced radially from the wheel 26. In an embodiment of the invention as shown in
Obviously, many modifications and variations of the present invention are possible in light of the above teachings and may be practiced otherwise than as specifically described while within the scope of the appended claims. That which is prior art in the claims precedes the novelty set forth in the “characterized by” clause. The novelty is meant to be particularly and distinctly recited in the “characterized by” clause whereas the antecedent recitations merely set forth the old and well-known combination in which the invention resides. These antecedent recitations should be interpreted to cover any combination in which the inventive novelty exercises its utility. The use of the word “said” in the apparatus claims refers to an antecedent that is a positive recitation meant to be included in the coverage of the claims whereas the word “the” precedes a word not meant to be included in the coverage of the claims. In addition, the reference numerals in the claims are merely for convenience and are not to be read in any way as limiting.
This application claims the benefit of application Ser. No. 60/896,010 filed Mar. 21, 2007.
| Number | Date | Country | |
|---|---|---|---|
| 60896010 | Mar 2007 | US |
