Doff your (gas) cap.
ITW has an answer to this dilemma. It's called the Direct Fueling System (OFS), and replaces the gas cap with a ribbed shutter that pivots out of the way as it guides the nozzle into the receptacle. There the nozzle moves a flapper valve that seals the system out of the way. "The shutter keeps dirt from infiltrating the system," says Parker, adding that even a direct blast from a pressure washer didn't open the port and let contaminants into the system. The demonstration worked: Renault's Megane has a version of the system, as does the Ford GT.
Despite having to accommodate the 4-in. evaporative emission boot mandated for California gas stations, Parker claims the DFS unit can be "significantly smaller" than the 7-in. diameter fuel door commonly used today. And while he admits the design is slightly more expensive than conventional fuel filler systems, he claims the price will fall as volume increases and bring significant cost savings when the DFS is designed as part of the total fuel system. Nevertheless, Parker states that DEMs have shown a keen interest in DFS, and are looking to adopt it on some high-volume vehicle lines.--CAS
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|Publication:||Automotive Design & Production|
|Date:||Jul 1, 2005|
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