Vehicle fueling system using double block and bleed fuel line

The invention is an improved method and system to fuel a vehicle such as a hydrogen-powered vehicle. The present invention vents air into a fuel fill line within the vehicle from a fuel fill receptacle to the vehicle's fuel storage tank. The invention eliminates or reduces inadvertent fuel ignition from electrostatic discharge in and around a vehicle fuel line during fueling. Just prior to fueling, the invention vents the fuel line in between two of a plurality of fuel line check valves closest to the receptacle. The invention can be configured to activate the vent system where a first switch indicates vehicle fueling is imminent (such as a fuel fill door is opened) and a second switch indicates that the receptacle is not attached to a fuel source. The system can also be configured to deactivate if the first switch indicates fueling is not imminent (the fuel door is closed), or the second switch indicates that the receptacle is attached to the fuel source. Additional features can include a calibratable timer to assure enough time has lapsed to assure proper fuel venting has occurred; a disable feature to disable the vent system when the vehicle is powered off; and indicators for the vehicle operator that the venting system is functioning.