| Popis: |
The addition of varying amounts of bioethanol to gasoline in order to create so-called flex fuels changes the properties of the fuel. Consequently, all sealing components that come in contact with the fuel — such as valve stem seals, radial shaft seals (Simmer rings), and O-rings — must be resistant to ethanol. The flex fuels’ aggressive combustion products and blow-by products must also be taken into consideration. Freudenberg Dichtungs- und Schwingungstechnik has developed and successfully tested special fluororubber (FKM) compounds for flex fuel seals. These sealing elastomers have been optimized in such a way that they neither swell significantly nor do their mechanical properties, like elongation at break and tensile strength, change when they come in contact with E 22, E 85, and E 100. These sealing materials meet the automobile industry’s requirements for use in flex fuel vehicles. |
Full text from SpringerLink