| 摘要 |
Disclosed is a vent system for fuel tanks which prevents fuel leakage when automobile is overturned. This system utilizes a fuel leakage prevention device that is operated by the liquid pressure between the vent pipe and fuel tank. On top of the fuel tank(10) are 2 holes(11,12) at intervals, and these holes are connected by U pipe(13) in which are a large piston(14) and a small piston(15) that operate through holes(11,12) respectively. An incompressible liquid is filled inside of U pipe(13); the smaller piston(15) is supported by coil spring(16) on hole(12) which is connected with vent pipe(17) on which the 2-way valve(18) is installed. Vehicle safety is secured by preventing fuel leakage.
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