Patent ID: 7086236

Claim:
A method for venting an interior space of a capsule of a vehicle cryo fuel tank system, the capsule containing at least one of a line, a valve and a storage container for a cryo fuel, comprising the acts of: generating a pressure differential between the capsule interior space and a space exterior to the capsule, where the capsule interior space is a space between a inside wall of the capsule and an outside wall of the storage container therein; applying the pressure differential to a gas in the capsule interior space with a rinsing medium to cause a gas in the capsule interior space to be exhausted from the capsule, wherein the rinsing medium is a vehicle internal combustion engine exhaust gas, wherein the exhaust of gas from the capsule interior space is controlled to extend over a predetermined time; and treating the gas from the capsule interior space to reduce its environmental impact.