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Teflon inner hose counters RME
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01/04/2007
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The trend towards alternative fuels is challenging automotive fuel-line designers. Some diesel fuels already have a 5% rape seed methyl ester (RME) content that is more aggressive than mineral diesel and known to attack plastic fuel lines.
ContiTech Fluid Technology has been tracking the problems and has designed new stainless steel lines with corrugated Teflon (PTFE) inner hoses to solve the problem.
The corrugated element gives the fuel line the flexibility needed for installation in compact engine compartments. The PTFE material used is resistant to RME inside and out. And since no soldering is involved, the problem of leaky joints is avoided.
“The RME content in diesel fuels is sure to grow, if for no other than ecological reasons,” said Herbert Kohn, sales and marketing manager for the truck segment at ContiTech Fluid Technology. An early user of the technology is DaimlerChrysler for its EvoBus.
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Author
Robert Bishop
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